CA2218116C - Pulmonary delivery of aerosolized medicaments - Google Patents
Pulmonary delivery of aerosolized medicaments Download PDFInfo
- Publication number
- CA2218116C CA2218116C CA002218116A CA2218116A CA2218116C CA 2218116 C CA2218116 C CA 2218116C CA 002218116 A CA002218116 A CA 002218116A CA 2218116 A CA2218116 A CA 2218116A CA 2218116 C CA2218116 C CA 2218116C
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- CA
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- Prior art keywords
- composition
- dry powder
- macromolecule
- interleukin
- particles
- Prior art date
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- A61K9/007—Pulmonary tract; Aromatherapy
- A61K9/0073—Sprays or powders for inhalation; Aerolised or nebulised preparations generated by other means than thermal energy
- A61K9/0075—Sprays or powders for inhalation; Aerolised or nebulised preparations generated by other means than thermal energy for inhalation via a dry powder inhaler [DPI], e.g. comprising micronized drug mixed with lactose carrier particles
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- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2202/00—Special media to be introduced, removed or treated
- A61M2202/06—Solids
- A61M2202/064—Powder
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/02—General characteristics of the apparatus characterised by a particular materials
- A61M2205/0233—Conductive materials, e.g. antistatic coatings for spark prevention
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/07—General characteristics of the apparatus having air pumping means
- A61M2205/071—General characteristics of the apparatus having air pumping means hand operated
- A61M2205/073—Syringe, piston type
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2799/00—Uses of viruses
- C12N2799/02—Uses of viruses as vector
- C12N2799/021—Uses of viruses as vector for the expression of a heterologous nucleic acid
- C12N2799/022—Uses of viruses as vector for the expression of a heterologous nucleic acid where the vector is derived from an adenovirus
Abstract
According to the subject invention, dispersible dry powder pharmaceutical- based compositions are provided, including methods for their manufacture and dry powder dispersion devices. A dispersible dry power pharmaceutical-based composition is one having a moisture content of less than about 10 % by weight (%w) water, usually below about 5 %w and preferably less than about 3 %w; a particle size of about 1.0-5.0 .mu.m mass median diameter (MMD), usually 1.0-4.0 .mu.m MMD, a nd preferably 1.0-3.0 .mu.m MMD; a delivered dose of about >30 %, usually >40 %, preferably >50 %, and most preferred >60 %; and a n aerosol particle size distribution of about 1.0-5.0 .mu.m mass median aerodynamic diameter (MMAD), usually 1.5-4.5 .mu.m MMAD, and preferably 1.5- 4.0 .mu.m MMAD. Such composistions are of pharmaceutical grade purity.
Description
PULMONARY DELIVERY OF AEROSOLIZED MEDICAMENTS
BACKGROUND OF THE INVENTION
1. Field of the Invention.
The present invention relates generally to methods and compositions for the dry powder formulation of pharmaceuticals, including macromolecules, for pulmonary delivery.
Over the years, certain drugs have been sold in compositions suitable for forming a drug dispersion for oral inhalation (pulmonary delivery) to treat various conditions in humans. Such pulmonary drug delivery compositions are designed to be delivered by inhalation by the patient of a drug dispersion so that the active drug within the dispersion can reach the lung. It has been found that certain drugs=
delivered to the lung are readily absorbed through the alveolar region directly into blood circulation. Pulmonary delivery is particularly promising for the delivery of macromolecules (proteins, polypeptides and nucleic acids) which are difficult to deliver by other routes of administration. Such pulmonary delivery can be effective both for systemic delivery and for localized delivery to treat diseases of the lungs.
Pulmonary drug delivery can itself be achieved by different approaches, including liquid nebulizers, aerosol-based metered dose inhalers (MDI's), and dry powder dispersion devices. Aerosol-based MDI's are losing favor because they rely on the use of chlorofluorocarbons (CFC's), which are being banned because of their adverse effect on the ozone layer. Dry powder dispersion devices, which do not rely on CFC aerosol technology, are promising for delivering drugs that may be readily formulated as dry powders. Many otherwise labile macromolecules may be stably stored as lyophilized or spray-dried powders by themselves or in combination with suitable powder carriers. The ability to deliver pharmaceutical compositions as dry powders, however, is problematic in certain respects. The dosage of many pharmaceutical compositions is often critical so it is necessary that any dry powder delivery system be able to accurately, precisely, and reliably deliver the intended amount of drug. Moreover, many pharmaceutical compositions are quite expensive. Thus, the ability to efficiently deliver the dry powders with a minimal loss of drug is critical. It is also essential that the powder be readily dispersible prior to inhalation by the patient in order to assure adequate distribution and systemic absorption.
A particularly promising approach for the pulmonary delivery of dry powder drugs utilizes a hand-held device with a hand pump for providing a source of pressurized gas. The pressurized gas is abruptly released through a powder dispersion device, such as a venturi nozzle, and the dispersed powder made available for patient inhalation. While advantageous in many respects, such hand-held devices are problematic in a number of other respects. The particles being delivered are less than 10 m in size, usually in the range from igm to 5 m, making powder handling and dispersion more difficult than with larger particles. The problems are exacerbated by the relatively small volumes of pressurized gas, which are available using hand-actuated pumps. In particular, venturi dispersion devices are unsuitable for difficult-to-disperse powders when only small volumes of pressurized gas are available. Another requirement for hand-held and other powder delivery devices is efficiency. it is important that the concentration of drug in the bolus of gas be relatively high to reduce the number of breaths required to achieve a total dosage. The ability to achieve both adequate dispersion and small dispersed volumes is a significant technical challenge that requires in part that each unit dosage of the powdered composition be readily and reliably dispersible.
SUMMARY OF THE INVENTION
According to the subject invention, dispersible dry powder pharmaceutical-based compositions are provided, including methods for their manufacture and dry powder dispersion devices. A dispersible dry powder pharmaceutical-based composition is one having a moisture content of less than about 10% by weight (ow) water, usually below about 5 sw and preferably less than about 3%w; a particle size of about 1.0-5.0 m mass median diameter (MMD), usually 1.0-4.0 m MMD, and preferably 1.0-3.0 m MMD; a delivered dose of about >300, usually >400, preferably >50%, and most preferred >600; and an aerosol particle size distribution of about 1.0-5.0 fcm mass median aerodynamic diameter (MMAD), usually 1.5-4.5 m MMAD, and preferably 1.5-4.0 m MMAD. Such compositions are of pharmaceutical grade purity.
DESCRIPTION OF SPECIFIC EMBODIMENTS
The present invention is based at least in part on the dispersibility characteristics of the pharmaceutical-based dry powder compositions produced according to the present invention. The dispersibility characteristics of the subject pharmaceutical-based compositions means that they are more suitable for use in pulmonary delivery devices than compositions prepared by other methods. The compositions of the invention are readily aerosolized and rapidly absorbed through the lungs of a host when delivered by a dry powder inhaler.
DEFINITIONS
In interpreting the claims to the various aspects of this invention, there are several important definitions that should be considered.
The term "dispersibility" or "dispersible" means a dry powder having a moisture content of less than about 10a by weight (ow) water, usually below about 5ow and preferably less than about 3~;w; a particle size of about 1.0-5.0 m mass median diameter (MMD), usually 1.0-4.0 m MMD, and preferably 1.0-3.0 m MMD; a delivered dose of about >300, usually >40%, preferably >500, and most preferred >600; and an aerosol particle size distribution of about 1.0-5.0 m mass median aerodynamic diameter (MMAD), usually 1.5-4.5 Am MMAD, and preferably 1.5-4.0 m MMAD.
The term "powder" means a composition that consists of finely dispersed solid particles that are free flowing and capable of being readily dispersed in an inhalation device and subsequently inhaled by a subject so that the particles reach the lungs to permit penetration into the alveoli. Thus, the powder is said to be "respirable." Preferably the average particle size is less than about 10 microns ( m) in diameter with a relatively uniform spheroidal shape distribution. More preferably the diameter is less than about 7.5 m and most preferably less than about 5.0 m. Usually the particle size distribution is between about 0.1 m and about 5 m in diameter, particularly about 0.3 m to about 5 f,r.m.
The term "dry" means that the composition has a moisture content such that the particles are readily dispersible in an inhalation device to form an aerosol. This moisture content is generally below about 10a by weight (%w) water, usually below about 5%w and preferably less than about 3%~w.
The term "therapeutically effective amount" is the amount present in the composition that is needed to provide the desired level of drug in the subject to be treated to give the anticipated physiological response. This amount is determined for each drug on a case-by-case basis. Guidelines are given hereafter.
The term "physiologically effective amount" is that amount delivered to a subject to give the desired palliative or curative effect. This amount is specific for each drug and its ultimate approved dosage level. Guidelines are given hereafter.
The term "pharmaceutically acceptable carrier" means that the carrier can be taken into the lungs with no significant adverse toxicological effects on the lungs.
BACKGROUND OF THE INVENTION
1. Field of the Invention.
The present invention relates generally to methods and compositions for the dry powder formulation of pharmaceuticals, including macromolecules, for pulmonary delivery.
Over the years, certain drugs have been sold in compositions suitable for forming a drug dispersion for oral inhalation (pulmonary delivery) to treat various conditions in humans. Such pulmonary drug delivery compositions are designed to be delivered by inhalation by the patient of a drug dispersion so that the active drug within the dispersion can reach the lung. It has been found that certain drugs=
delivered to the lung are readily absorbed through the alveolar region directly into blood circulation. Pulmonary delivery is particularly promising for the delivery of macromolecules (proteins, polypeptides and nucleic acids) which are difficult to deliver by other routes of administration. Such pulmonary delivery can be effective both for systemic delivery and for localized delivery to treat diseases of the lungs.
Pulmonary drug delivery can itself be achieved by different approaches, including liquid nebulizers, aerosol-based metered dose inhalers (MDI's), and dry powder dispersion devices. Aerosol-based MDI's are losing favor because they rely on the use of chlorofluorocarbons (CFC's), which are being banned because of their adverse effect on the ozone layer. Dry powder dispersion devices, which do not rely on CFC aerosol technology, are promising for delivering drugs that may be readily formulated as dry powders. Many otherwise labile macromolecules may be stably stored as lyophilized or spray-dried powders by themselves or in combination with suitable powder carriers. The ability to deliver pharmaceutical compositions as dry powders, however, is problematic in certain respects. The dosage of many pharmaceutical compositions is often critical so it is necessary that any dry powder delivery system be able to accurately, precisely, and reliably deliver the intended amount of drug. Moreover, many pharmaceutical compositions are quite expensive. Thus, the ability to efficiently deliver the dry powders with a minimal loss of drug is critical. It is also essential that the powder be readily dispersible prior to inhalation by the patient in order to assure adequate distribution and systemic absorption.
A particularly promising approach for the pulmonary delivery of dry powder drugs utilizes a hand-held device with a hand pump for providing a source of pressurized gas. The pressurized gas is abruptly released through a powder dispersion device, such as a venturi nozzle, and the dispersed powder made available for patient inhalation. While advantageous in many respects, such hand-held devices are problematic in a number of other respects. The particles being delivered are less than 10 m in size, usually in the range from igm to 5 m, making powder handling and dispersion more difficult than with larger particles. The problems are exacerbated by the relatively small volumes of pressurized gas, which are available using hand-actuated pumps. In particular, venturi dispersion devices are unsuitable for difficult-to-disperse powders when only small volumes of pressurized gas are available. Another requirement for hand-held and other powder delivery devices is efficiency. it is important that the concentration of drug in the bolus of gas be relatively high to reduce the number of breaths required to achieve a total dosage. The ability to achieve both adequate dispersion and small dispersed volumes is a significant technical challenge that requires in part that each unit dosage of the powdered composition be readily and reliably dispersible.
SUMMARY OF THE INVENTION
According to the subject invention, dispersible dry powder pharmaceutical-based compositions are provided, including methods for their manufacture and dry powder dispersion devices. A dispersible dry powder pharmaceutical-based composition is one having a moisture content of less than about 10% by weight (ow) water, usually below about 5 sw and preferably less than about 3%w; a particle size of about 1.0-5.0 m mass median diameter (MMD), usually 1.0-4.0 m MMD, and preferably 1.0-3.0 m MMD; a delivered dose of about >300, usually >400, preferably >50%, and most preferred >600; and an aerosol particle size distribution of about 1.0-5.0 fcm mass median aerodynamic diameter (MMAD), usually 1.5-4.5 m MMAD, and preferably 1.5-4.0 m MMAD. Such compositions are of pharmaceutical grade purity.
DESCRIPTION OF SPECIFIC EMBODIMENTS
The present invention is based at least in part on the dispersibility characteristics of the pharmaceutical-based dry powder compositions produced according to the present invention. The dispersibility characteristics of the subject pharmaceutical-based compositions means that they are more suitable for use in pulmonary delivery devices than compositions prepared by other methods. The compositions of the invention are readily aerosolized and rapidly absorbed through the lungs of a host when delivered by a dry powder inhaler.
DEFINITIONS
In interpreting the claims to the various aspects of this invention, there are several important definitions that should be considered.
The term "dispersibility" or "dispersible" means a dry powder having a moisture content of less than about 10a by weight (ow) water, usually below about 5ow and preferably less than about 3~;w; a particle size of about 1.0-5.0 m mass median diameter (MMD), usually 1.0-4.0 m MMD, and preferably 1.0-3.0 m MMD; a delivered dose of about >300, usually >40%, preferably >500, and most preferred >600; and an aerosol particle size distribution of about 1.0-5.0 m mass median aerodynamic diameter (MMAD), usually 1.5-4.5 Am MMAD, and preferably 1.5-4.0 m MMAD.
The term "powder" means a composition that consists of finely dispersed solid particles that are free flowing and capable of being readily dispersed in an inhalation device and subsequently inhaled by a subject so that the particles reach the lungs to permit penetration into the alveoli. Thus, the powder is said to be "respirable." Preferably the average particle size is less than about 10 microns ( m) in diameter with a relatively uniform spheroidal shape distribution. More preferably the diameter is less than about 7.5 m and most preferably less than about 5.0 m. Usually the particle size distribution is between about 0.1 m and about 5 m in diameter, particularly about 0.3 m to about 5 f,r.m.
The term "dry" means that the composition has a moisture content such that the particles are readily dispersible in an inhalation device to form an aerosol. This moisture content is generally below about 10a by weight (%w) water, usually below about 5%w and preferably less than about 3%~w.
The term "therapeutically effective amount" is the amount present in the composition that is needed to provide the desired level of drug in the subject to be treated to give the anticipated physiological response. This amount is determined for each drug on a case-by-case basis. Guidelines are given hereafter.
The term "physiologically effective amount" is that amount delivered to a subject to give the desired palliative or curative effect. This amount is specific for each drug and its ultimate approved dosage level. Guidelines are given hereafter.
The term "pharmaceutically acceptable carrier" means that the carrier can be taken into the lungs with no significant adverse toxicological effects on the lungs.
5 COMPOSITIONS OF TFiE INVENTION
One aspect of this invention is a dispersible pharmaceutical-based dry powder composition for pulmonary delivery, the composition comprising a therapeutically effective amount of a pharmaceutical in combination with a pharmaceutically acceptable carrier.
In general, the compositions of this invention have a suitable for pulmonary delivery because of their dispersibility characteristics. Such compositions were not previously known in the art. In the dry state, the pharmaceutical may be in crystalline or amorphous form. Some examples of pharmaceutical compositions suitable for formulation into dispersible dry powders are listed in Table 1. These include macromolecule and non-macromolecule-based pharmaceuticals, usually macromolecules, with insulin, interleukin-1 receptor, parathyroid hormone (PTH-34), alpha-i antitrypsin, calcitonin, low molecular weight heparin, heparin, interferon, and nucleic acids being preferred.
A therapeutically effective amount of active pharmaceutical will vary in the composition depending on the biological activity of the drug employed and the amount needed in a unit dosage form. Because the subject compounds are dispersible, it is highly preferred that they be manufactured in a unit dosage form in a manner that allows for ready manipulation by the formulator and by the consumer. This generally means that a unit dosage will be between about 0.5 mg and 15 mg of total material in the dry powder composition, ' preferably between about 2 mg and 10 mg. Generally, the amount of drug in the composition will vary from about 0.05%w to about 99.02W. Most preferably the composition will be about 0.2% to about 97.0%w drug.
The amount of the pharmaceutically acceptable carrier is that amount needed to provide the necessary stability, dispersibility, consistency and bulking characteristics to ensure a uniform pulmonary delivery of the composition to a subject in need thereof. Numerically the amount may be from about 0.05%w to about 99.95%w, depending on the activity of the drug being employed. Preferably about 5%w to about 95%w will be used.
The carrier may be one or a combinatior.. of two or more pharmaceutical excipients, but will generally be substantially free of any "penetration enhancers."
Penetration enhancers are surface active compounds which promote penetration of a drug through a mucosal membrane or lining and are proposed for use in intranasal, intrarectal, and intravaginal drug formulations. Exemplary penetration enhancers include bile salts, e.g., taurocholate, glycocholate, and deoxycholate; fusidates, e.g., taurodehydrofusidate; and biocompatible detergents, e.g., TweensTM,Laureth-9, and the like. The use of penetration enhancers in formulations for the lungs, however, is generally undesirable because the epithelial blood barrier in the lung can be adversely affected by such surface active compounds.
The dry powder compositions of the present invention are readily absorbed in the lungs without the need to employ penetration enhancers.
The types of pharmaceutical excipients that are useful as carriers in this invention include stabilizers such as human serum albumin (HSA), bulking agents such as carbohydrates, amino acids and polypeptides; pH adjusters or buffers; salts such as sodium chloride; and the like. These carriers may be in a crystalline or amorphous form or may be a mixture of the two.
It has been found that liSA is particularly valuable as a carrier in that it provides improved dispersibility.
Bulking agents that are particularly valuable include compatible carbohydrates, polypeptides, amino acids or combinations thereof. Suitable carbohydrates include monosaccharides such as galactose, D-mannose, sorbose, and the like; disaccharides, such as lactose, trehalose, and the like;
cyclodextrins, such as 2-hydroxypropyl-g-cyclodextrin; and polysaccharides, such as raffinose, maltodextrins, dextrans, and the like; alditols, such as mannitol, xylitol, and the like. A preferred group of carbohydrates includes lactose, trehalose, raffinose maltodextrins, and mannitol. Suitable polypeptides include aspartame. Amino acids include alanine and glycine, with glycine being preferred.
Additives, which are minor components of the composition of this invention, may be included for conformational stability during spray drying and for improving dispersibility of the powder. These additives include hydrophobic amino acids such as tryptophan, tyrosine, leucine, phenylalanine, and the like.
Suitable pH adjusters or buffers include organic salts prepared from organic acids and bases, such as sodium citrate, sodium ascorbate, and the like; sodium citrate is preferred.
The unit dosage form, method of treatment, and process of preparation of this invention are described hereafter.
Unit Dosage Form.
Another aspect of this invention is a unit dosage form for pulmonary delivery of dispersible dry powder pharmaceutical-based compositions, which dosage form comprises a unit dosage receptacle containing a pharmaceutical-based dry powder composition, which composition comprises a therapeutically effective amount of a pharmaceutical in combination with a pharmaceutically acceptable carrier.
In this aspect of the invention, the composition of this invention (as discussed hereinbefore) is placed within a suitable dosage receptacle in an amount sufficient to provide a subject with drug for a unit dosage treatment. The dosage receptacle is one that fits within a suitable inhalation device to allow for the aerosolization of the interferon-based dry powder composition by dispersion into a gas stream to form an aerosol and then capturing the aerosol so produced in a chamber having a mouthpiece attached for subsequent inhalation by a subject in need of treatment. Such a dosage receptacle includes any container enclosing the composition known in the art such as gelatin or plastic capsules with a removable portion that allows a stream of gas (e.g., air) to be directed into the container to disperse the dry powder composition.
Such containers are exemplified by those shown in U.S. Patents 4,227,522 issued October 14, 1980; 4,192,309 issued March il, 1980; and 4,105,027 issued August 8, 1978. Suitable containers also include those used in conjunction with Glaxo's Ventolin Rotohaler brand powder inhaler or Fison's Spinhaler brand powder inhaler. Another suitable unit-dose container which provides a superior moisture barrier is formed from an aluminum foil plastic laminate. The pharmaceutical-based powder is filled by weight or by volume into the depression in the formable foil and hermetically sealed with a covering foil-plastic laminate. Such a container for use with a powder inhalation device is described in U.S. Patent 4,778,054 and is used with Glaxo's Diskhaler (U.S. Patents 4,627,432;
4,811,731; and 5,035,237).
Method of Treatina a Disease State.
Another aspect of this invention is a method of treating a condition responsive to treatment by a pharmaceutical of interest, which method comprises pulmonarily administering to a subject in need thereof a physiologically effective amount of a dispersible pharmaceutical-based dry powder composition that comprises a therapeutically effective amount of drug in combination with a pharmaceutically acceptable carrier.
Conditions that may be treated by the compositions of this are described in Table 1.
The physiologically effective amount needed to treat a particular condition or disease state will depend on the individual, the condition, length of treatment, the regularity of treatment, the type of drug, and other factors, but can be determined by one of ordinary skill in the medicinal arts.
It is presently believed that the effective absorption by a host of dry powder composition according to the present invention results from a rapid dissolution in the ultra-thin (<0.1 (m) fluid layer of the alveolar lining of the lung. The particles of the present invention thus have a mean size which is from 10 to 50 times larger than the lung fluid layer, making it unexpected that the particles are dissolved and the interferon systemically absorbed in a rapid manner for either local lung or systemic treatment. An understanding of the precise mechanism, however, is not necessary for practicing the present invention as described herein.
The aerosolized pharmaceutical-based dry powders of this invention are particularly useful in place of parenteral delivery. Thus, the methods and compositions of the present invention will be particularly valuable in chronic treatment protocols where a patient can self-medicate. The patient can achieve a desired dosage by inhaling an appropriate amount of drug, as just described. The efficiency of systemic delivery via the method as just described will typically be in the range from about 15% to 50%.
Method for Aerosolizina the Powder.
Still another aspect of this invention is a device and method for aerosolizing a pharmaceutical-based dry powder composition that comprises a therapeutically effective amount of drug in combination with a pharmaceutically acceptable carrier, which method comprises dispersing an amount of the dry powder composition in a gas stream to form an aerosol and capturing the aerosol in a chamber having a mouthpiece for subsequent inhalation by a patient.
A further detailed description of this method is found in U.S. Patent Nos. 5,458,135 and 5,997,848.
prenarina the Compositions Still another aspect of this invention is a method for preparing a dispersible pharmaceutical-based dry powder composition of this invention that comprises spray drying an aqueous mixture of the drug and a pharmaceutically acceptable carrier under conditions to provide a respirable dry powder composition.
Spray drying is a process in which a homogeneous aqueous mixture of drug and the carrier is introduced via a 5 nozzle (e.g., a two fluid nozzle), spinning disc or an equivalent device into a hot gas stream to atomize the solution to form fine droplets. The aqueous mixture may be a solution, suspension, slurry, or the like, but needs to be homogeneous to ensure uniform distribution of the components 10 in the mixture and ultimately the powdered composition.
Preferably the aqueous mixture is a solution. The solvent, generally water, rapidly evaporates from the droplets producing a fine dry powder having particles 1 to 5 m in diameter. Surprisingly, the drug is not degraded when it is exposed to the hot drying gas, and the interferon powders can be prepared having sufficient purity for pharmaceutical use.
An acceptable purity is defined as less than 5% degradation products and contaminates, preferably less than 3a and most preferably less than lo.
The spray drying is done under conditions that result in substantially amorphous powder of homogeneous constitution having a particle size that is respirable, a low moisture content and flow characteristics that allow for ready aerosolization. Preferably the particle size of the resulting powder is such that more than about 98% of the mass is in particles having a diameter of about 10 m or less with about 90% of the mass being in particles having a diameter less than 5 m. Alternatively, about 950 of the mass will have particles with a diameter of less than 10 Am with about 800 of the mass of the particles having a diameter of less than 5 m.
The solutions may then be sprayed dried in conventional spray drying equipment from commercial suppliers, such as Buchi, Niro, Yamato Chemical Co., Okawara Kakoki Co., and the like, resulting in a substantially amorphous particulate product.
For the spraying process, such spraying methods as rotary atomization, pressure atomization and two-fluid atomization can be used. Examples of the devices used in these processes include "Parubisu [phonetic rendering]
Mini-Spray GA-32" and "Parubisu Spray Drier DL-41", manufactured by Yamato Chemical Co., or "Spray Drier CL-8,"
"Spray Drier L-8," "Spray Drier FL-12," "Spray Drier FL-16" or "Spray Drier FL-20," manufactured by Okawara Kakoki Co., can be used for the method of spraying using rotary-disk atomizer.
While no special restrictions are placed on the nozzle of the atomizer used in the process of spraying, it is recommended to use a nozzle which can produce a spray-dry composition with a grain diameter suitable for nasal, pharyngeal or pulmonary administration. For example, nozzle types "lA," "1," "2A," "2," "3" and the like, manufactured by Yamato Chemical Co., can be used for the above-mentioned spray-drier, manufactured by the same company. In addition, disks type "MC-50," "MC-65" or "MC-85," manufactured by Okawara Kakoki Co., can be used as rotary disks of the, spray-drier atomizer, manufactured by the same company.
While no particular restrictions are placed on the gas used to dry the sprayed material, it is recommended to use air, nitrogen gas or an inert gas. The temperature of the inlet of the gas used to dry the sprayed materials such that it does not cause heat deactivation of the sprayed material.
The range of temperatures may vary between about 50 C to about 200 C, preferably between about 50 C and 100 C. The temperature of the outlet gas used to dry the sprayed material, may vary between about 0 C and about 150 , preferably between 0 C and 90 C, and even more preferably between 0 C and 60 C. The fact that inlet and outlet temperatures above about 55 C can be used is surprising in view of the fact that most macromolecule-based drugs deactivate at that temperature, with nearly complete deactivation occurring at about 70 C.
The dispersible pharmaceutical-based dry powders of the present invention may optionally be combined with pharmaceutical carriers or excipients which are suitable for respiratory and pulmonary administration. Such carriers may serve simply as bulking agents when it is desired to reduce the interferon concentration in the powder which is being delivered to a patient, but may also serve to enhance the stability of the interferon compositions and to improve the dispersibility of the powder within a powder dispersion device in order to provide more efficient and reproducible delivery of the interferon and to improve handling characteristics of the interferon such as flowability and consistency to facilitate manufacturing and powder filling.
Such carrier mater-ials may be combined with the drug prior to spray drying, i.e., by adding the carrier material to the purified bulk solution. In that way, the carrier particles will be formed simultaneously with the drug particles to produce a homogeneous powder. Alternatively, the carriers may be separately prepared in a dry powder form and combined with the dry powder drug by blending. The powder carriers will usually be crystalline (to avoid water absorption), but might in some cases be amorphous or mixtures of crystalline and amorphous. The size of the carrier particles may be selected to improve the flowability of the drug powder, typically being in the range from 25 m to 100 m. A preferred carrier material is crystalline lactose having a size in the above-stated range.
Alternatively, dry powder compositions may be prepared by other processes such as lyophilization and jet milling as disclosed in WO 91/16038.
One aspect of this invention is a dispersible pharmaceutical-based dry powder composition for pulmonary delivery, the composition comprising a therapeutically effective amount of a pharmaceutical in combination with a pharmaceutically acceptable carrier.
In general, the compositions of this invention have a suitable for pulmonary delivery because of their dispersibility characteristics. Such compositions were not previously known in the art. In the dry state, the pharmaceutical may be in crystalline or amorphous form. Some examples of pharmaceutical compositions suitable for formulation into dispersible dry powders are listed in Table 1. These include macromolecule and non-macromolecule-based pharmaceuticals, usually macromolecules, with insulin, interleukin-1 receptor, parathyroid hormone (PTH-34), alpha-i antitrypsin, calcitonin, low molecular weight heparin, heparin, interferon, and nucleic acids being preferred.
A therapeutically effective amount of active pharmaceutical will vary in the composition depending on the biological activity of the drug employed and the amount needed in a unit dosage form. Because the subject compounds are dispersible, it is highly preferred that they be manufactured in a unit dosage form in a manner that allows for ready manipulation by the formulator and by the consumer. This generally means that a unit dosage will be between about 0.5 mg and 15 mg of total material in the dry powder composition, ' preferably between about 2 mg and 10 mg. Generally, the amount of drug in the composition will vary from about 0.05%w to about 99.02W. Most preferably the composition will be about 0.2% to about 97.0%w drug.
The amount of the pharmaceutically acceptable carrier is that amount needed to provide the necessary stability, dispersibility, consistency and bulking characteristics to ensure a uniform pulmonary delivery of the composition to a subject in need thereof. Numerically the amount may be from about 0.05%w to about 99.95%w, depending on the activity of the drug being employed. Preferably about 5%w to about 95%w will be used.
The carrier may be one or a combinatior.. of two or more pharmaceutical excipients, but will generally be substantially free of any "penetration enhancers."
Penetration enhancers are surface active compounds which promote penetration of a drug through a mucosal membrane or lining and are proposed for use in intranasal, intrarectal, and intravaginal drug formulations. Exemplary penetration enhancers include bile salts, e.g., taurocholate, glycocholate, and deoxycholate; fusidates, e.g., taurodehydrofusidate; and biocompatible detergents, e.g., TweensTM,Laureth-9, and the like. The use of penetration enhancers in formulations for the lungs, however, is generally undesirable because the epithelial blood barrier in the lung can be adversely affected by such surface active compounds.
The dry powder compositions of the present invention are readily absorbed in the lungs without the need to employ penetration enhancers.
The types of pharmaceutical excipients that are useful as carriers in this invention include stabilizers such as human serum albumin (HSA), bulking agents such as carbohydrates, amino acids and polypeptides; pH adjusters or buffers; salts such as sodium chloride; and the like. These carriers may be in a crystalline or amorphous form or may be a mixture of the two.
It has been found that liSA is particularly valuable as a carrier in that it provides improved dispersibility.
Bulking agents that are particularly valuable include compatible carbohydrates, polypeptides, amino acids or combinations thereof. Suitable carbohydrates include monosaccharides such as galactose, D-mannose, sorbose, and the like; disaccharides, such as lactose, trehalose, and the like;
cyclodextrins, such as 2-hydroxypropyl-g-cyclodextrin; and polysaccharides, such as raffinose, maltodextrins, dextrans, and the like; alditols, such as mannitol, xylitol, and the like. A preferred group of carbohydrates includes lactose, trehalose, raffinose maltodextrins, and mannitol. Suitable polypeptides include aspartame. Amino acids include alanine and glycine, with glycine being preferred.
Additives, which are minor components of the composition of this invention, may be included for conformational stability during spray drying and for improving dispersibility of the powder. These additives include hydrophobic amino acids such as tryptophan, tyrosine, leucine, phenylalanine, and the like.
Suitable pH adjusters or buffers include organic salts prepared from organic acids and bases, such as sodium citrate, sodium ascorbate, and the like; sodium citrate is preferred.
The unit dosage form, method of treatment, and process of preparation of this invention are described hereafter.
Unit Dosage Form.
Another aspect of this invention is a unit dosage form for pulmonary delivery of dispersible dry powder pharmaceutical-based compositions, which dosage form comprises a unit dosage receptacle containing a pharmaceutical-based dry powder composition, which composition comprises a therapeutically effective amount of a pharmaceutical in combination with a pharmaceutically acceptable carrier.
In this aspect of the invention, the composition of this invention (as discussed hereinbefore) is placed within a suitable dosage receptacle in an amount sufficient to provide a subject with drug for a unit dosage treatment. The dosage receptacle is one that fits within a suitable inhalation device to allow for the aerosolization of the interferon-based dry powder composition by dispersion into a gas stream to form an aerosol and then capturing the aerosol so produced in a chamber having a mouthpiece attached for subsequent inhalation by a subject in need of treatment. Such a dosage receptacle includes any container enclosing the composition known in the art such as gelatin or plastic capsules with a removable portion that allows a stream of gas (e.g., air) to be directed into the container to disperse the dry powder composition.
Such containers are exemplified by those shown in U.S. Patents 4,227,522 issued October 14, 1980; 4,192,309 issued March il, 1980; and 4,105,027 issued August 8, 1978. Suitable containers also include those used in conjunction with Glaxo's Ventolin Rotohaler brand powder inhaler or Fison's Spinhaler brand powder inhaler. Another suitable unit-dose container which provides a superior moisture barrier is formed from an aluminum foil plastic laminate. The pharmaceutical-based powder is filled by weight or by volume into the depression in the formable foil and hermetically sealed with a covering foil-plastic laminate. Such a container for use with a powder inhalation device is described in U.S. Patent 4,778,054 and is used with Glaxo's Diskhaler (U.S. Patents 4,627,432;
4,811,731; and 5,035,237).
Method of Treatina a Disease State.
Another aspect of this invention is a method of treating a condition responsive to treatment by a pharmaceutical of interest, which method comprises pulmonarily administering to a subject in need thereof a physiologically effective amount of a dispersible pharmaceutical-based dry powder composition that comprises a therapeutically effective amount of drug in combination with a pharmaceutically acceptable carrier.
Conditions that may be treated by the compositions of this are described in Table 1.
The physiologically effective amount needed to treat a particular condition or disease state will depend on the individual, the condition, length of treatment, the regularity of treatment, the type of drug, and other factors, but can be determined by one of ordinary skill in the medicinal arts.
It is presently believed that the effective absorption by a host of dry powder composition according to the present invention results from a rapid dissolution in the ultra-thin (<0.1 (m) fluid layer of the alveolar lining of the lung. The particles of the present invention thus have a mean size which is from 10 to 50 times larger than the lung fluid layer, making it unexpected that the particles are dissolved and the interferon systemically absorbed in a rapid manner for either local lung or systemic treatment. An understanding of the precise mechanism, however, is not necessary for practicing the present invention as described herein.
The aerosolized pharmaceutical-based dry powders of this invention are particularly useful in place of parenteral delivery. Thus, the methods and compositions of the present invention will be particularly valuable in chronic treatment protocols where a patient can self-medicate. The patient can achieve a desired dosage by inhaling an appropriate amount of drug, as just described. The efficiency of systemic delivery via the method as just described will typically be in the range from about 15% to 50%.
Method for Aerosolizina the Powder.
Still another aspect of this invention is a device and method for aerosolizing a pharmaceutical-based dry powder composition that comprises a therapeutically effective amount of drug in combination with a pharmaceutically acceptable carrier, which method comprises dispersing an amount of the dry powder composition in a gas stream to form an aerosol and capturing the aerosol in a chamber having a mouthpiece for subsequent inhalation by a patient.
A further detailed description of this method is found in U.S. Patent Nos. 5,458,135 and 5,997,848.
prenarina the Compositions Still another aspect of this invention is a method for preparing a dispersible pharmaceutical-based dry powder composition of this invention that comprises spray drying an aqueous mixture of the drug and a pharmaceutically acceptable carrier under conditions to provide a respirable dry powder composition.
Spray drying is a process in which a homogeneous aqueous mixture of drug and the carrier is introduced via a 5 nozzle (e.g., a two fluid nozzle), spinning disc or an equivalent device into a hot gas stream to atomize the solution to form fine droplets. The aqueous mixture may be a solution, suspension, slurry, or the like, but needs to be homogeneous to ensure uniform distribution of the components 10 in the mixture and ultimately the powdered composition.
Preferably the aqueous mixture is a solution. The solvent, generally water, rapidly evaporates from the droplets producing a fine dry powder having particles 1 to 5 m in diameter. Surprisingly, the drug is not degraded when it is exposed to the hot drying gas, and the interferon powders can be prepared having sufficient purity for pharmaceutical use.
An acceptable purity is defined as less than 5% degradation products and contaminates, preferably less than 3a and most preferably less than lo.
The spray drying is done under conditions that result in substantially amorphous powder of homogeneous constitution having a particle size that is respirable, a low moisture content and flow characteristics that allow for ready aerosolization. Preferably the particle size of the resulting powder is such that more than about 98% of the mass is in particles having a diameter of about 10 m or less with about 90% of the mass being in particles having a diameter less than 5 m. Alternatively, about 950 of the mass will have particles with a diameter of less than 10 Am with about 800 of the mass of the particles having a diameter of less than 5 m.
The solutions may then be sprayed dried in conventional spray drying equipment from commercial suppliers, such as Buchi, Niro, Yamato Chemical Co., Okawara Kakoki Co., and the like, resulting in a substantially amorphous particulate product.
For the spraying process, such spraying methods as rotary atomization, pressure atomization and two-fluid atomization can be used. Examples of the devices used in these processes include "Parubisu [phonetic rendering]
Mini-Spray GA-32" and "Parubisu Spray Drier DL-41", manufactured by Yamato Chemical Co., or "Spray Drier CL-8,"
"Spray Drier L-8," "Spray Drier FL-12," "Spray Drier FL-16" or "Spray Drier FL-20," manufactured by Okawara Kakoki Co., can be used for the method of spraying using rotary-disk atomizer.
While no special restrictions are placed on the nozzle of the atomizer used in the process of spraying, it is recommended to use a nozzle which can produce a spray-dry composition with a grain diameter suitable for nasal, pharyngeal or pulmonary administration. For example, nozzle types "lA," "1," "2A," "2," "3" and the like, manufactured by Yamato Chemical Co., can be used for the above-mentioned spray-drier, manufactured by the same company. In addition, disks type "MC-50," "MC-65" or "MC-85," manufactured by Okawara Kakoki Co., can be used as rotary disks of the, spray-drier atomizer, manufactured by the same company.
While no particular restrictions are placed on the gas used to dry the sprayed material, it is recommended to use air, nitrogen gas or an inert gas. The temperature of the inlet of the gas used to dry the sprayed materials such that it does not cause heat deactivation of the sprayed material.
The range of temperatures may vary between about 50 C to about 200 C, preferably between about 50 C and 100 C. The temperature of the outlet gas used to dry the sprayed material, may vary between about 0 C and about 150 , preferably between 0 C and 90 C, and even more preferably between 0 C and 60 C. The fact that inlet and outlet temperatures above about 55 C can be used is surprising in view of the fact that most macromolecule-based drugs deactivate at that temperature, with nearly complete deactivation occurring at about 70 C.
The dispersible pharmaceutical-based dry powders of the present invention may optionally be combined with pharmaceutical carriers or excipients which are suitable for respiratory and pulmonary administration. Such carriers may serve simply as bulking agents when it is desired to reduce the interferon concentration in the powder which is being delivered to a patient, but may also serve to enhance the stability of the interferon compositions and to improve the dispersibility of the powder within a powder dispersion device in order to provide more efficient and reproducible delivery of the interferon and to improve handling characteristics of the interferon such as flowability and consistency to facilitate manufacturing and powder filling.
Such carrier mater-ials may be combined with the drug prior to spray drying, i.e., by adding the carrier material to the purified bulk solution. In that way, the carrier particles will be formed simultaneously with the drug particles to produce a homogeneous powder. Alternatively, the carriers may be separately prepared in a dry powder form and combined with the dry powder drug by blending. The powder carriers will usually be crystalline (to avoid water absorption), but might in some cases be amorphous or mixtures of crystalline and amorphous. The size of the carrier particles may be selected to improve the flowability of the drug powder, typically being in the range from 25 m to 100 m. A preferred carrier material is crystalline lactose having a size in the above-stated range.
Alternatively, dry powder compositions may be prepared by other processes such as lyophilization and jet milling as disclosed in WO 91/16038.
SELECTED MACROMOLECULE DRUGS
FOR SYSTEMIC APPLICATIONS
DRUG INDICATIONS
.
Calcitonin Osteoporosis Prophylaxis Paget's Disease Hypercalcemia Erthropoetin (EPO) Anemia Factor IX Hemophilia B
Granulocyte Colony Stimulating Neutropenia Factor (G-CSF) Granulocyte Macrophage Colony Bone Marrow Engraftment/Transplant Failure Stimulating Factor (GM-CSF) Growth Hormone Short Stature Renal Failure Heparin Blood Clotting Heparin (Low Molecular Weight) Blood Clotting Insulin Type I and Type II Diabetes Interferon Alpha Hepatitis B and C
Hairy Cell Leukemia Kaposi's Sarcoma Interferon Beta Multiple Sclerosis Interferon Gamma Chronic Granulomatous Disease Interleukin-2 Renal Cancer Luteinizing Hormone Releasing Prostate Cancer Hormone (LHRH) Endometriosis Somatostatin Analog Gastrointestinal Cancers Vasopressin Analog Diabetes Insipidus Bed Wetting Follicle Stimulating Hormone (FSH) Fertility Amylin Type I Diabetes Ciliary Neurotrophic Factor Lou Gehrig's Disease Growth Hormone Releasing Factor (GRF) Short Stature Insulin-Like Growth Factor Osteoporosis Nutritional Support Insulinotropin Type II Diabetes Interferon Beta Hepatitis B and C
Interferon Gamma Rheumatoid Arthritis Interleukin-1 Receptor Antagonist Rheumatoid Arthritis Interleukin-3 Adjuvant to Chemotherapy Interleukin-4 Immunodeficiency Disease Interleukin-6 Thrombocytopenia TABLE 1 - Continued SELECTED MACROMOLECULE DRUGS
FOR SYSTEMIC APPLICATIONS
DRUG INDICATIONS
Macrophage Colony Stimulating Fungal Disease Factor (M-CSF) Cancer Hypercholesterolemia Nerve Growth Factor Peripheral Neuropathies Parathyroid Hormone Osteoporosis Somatostatin Analog Refractory Diarrheas Thymosin Alpha 1 Hepatitis B and C
IIb/IIIa Inhibitor Unstable Angina Alpha-1 Antitrypsin Cystic Fibrosis Anti-RSV Antibody Respiratory Syncytial Virus Cystic Fibrosis Transmembrane Cystic Fibrosis Regulator (CFTR) Gene Deoxyribonuclease (DNase) Chronic Bronchitis Heparin Asthma Bactericidal/Permeability Adult Respiratory Distress Syndrome (ARDS) Increasing Protein (BPI) Anti-CMV Antibody Cytomegalovirus Interleukin-1 Receptor Asthma SELECTED NON-MACROMOLECULE DRUGS FOR SYSTEMIC
AND LOCAL LUNG APPLICATIONS
DRUG INDICATIONS
Pentaniidine isethiouate Pneumocystis carini pneumonia Albuterol sulfate Bronchospasm Metaproterenol sulfate Bronchial asthma Beclomethasone diprepionate Triamcinolone acetamide Budesonide acetonide Ipratropium bromide Flunisolide Cromolyn sodium Ergotamine Tartrate Migraines The following examples are offered by way of illustration and not limitation.
EXPERIMENTAL
According the subject invention, the following dispersible dry powder formulations were prepared as described. All compositions produced according to the present 5 invention meet the strict specifications for content and purity required of pharmaceutical products.
EXAMPLE I
10 20.0% INSIILIN FORMULATION FOR PULMONARY DELIVERY
A. Formulation.
Bulk crystalline human zinc insulin, was obtained from Eli Lilly and Company, Indianapolis, IN. A 209i; insulin 15 formulation was achieved by combining 1.5 mg insulin per 1.0 mL deionized water with 4.96 mg/mL USP mannitol and 1.04 mg/mL
citrate buffer (sodium citrate dihydrate USP and citric acid monohydrate USP) for a total solids concentration of 7.5 mg/mL
at pH 6.7 0.3.
B . Spray Drying.
A dry powder of the 20o insulin formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 2-8 C
Inlet temperature 120-122 C
Feed rate 5.3 mL/min Outlet temperature 80-81 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at < 80 C for about 10 minutes by slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The above 2091; insulin dry powder composition contained 66.1% mannitol and 13.9% citrate. The composition was found to contain 1.1 to 2.0a moisture as measured by a columbic Karl Fischer method using a Mitsubishi CA-06 Moisture Meter.
The particle size distribution of the composition was measured by liquid centrifugal sedimentation in a Horiba CAPA-700 Particle Size Analyzer following dispersion of the powder on Sedisperse A-11 (Micrometrics, Norcross, GA) and was determined to be 1.3 m to 1.5 m MMD.
The delivered dose of the insulin powder composition was measured by collecting the aerosol powder produced by a dry powder dispersion device, similar to devices described in co-pending U.S. Application Serial Numbers 07/910,048;
08/313,707; 08/309,691 and PCT/US92/05621, the disclosures of which are hereby incorporated by reference, on a filter placed over the device mouthpiece. The delivered dose of the insulin powder composition was determined to be 563 16 g or 60 to 64's of the total powder (5.0 mg) loaded into the device.
The aerosol particle size distribution, measured using a cascade impactor (California Measurements IMPAQ-6), was determined to be 2.0 Am MMAD, with 86o to 900 of the particles < 5.0 E.cm in diameter.
The insulin content of the powder, measured by reverse phase HPLC (rpHPLC) was determined to be 197 g/mg powder, accounting for 99% of the expected insulin. No degradation peaks were detected in the chromatogram.
EXAMPLE II
5.0% PARATHYROID HORMONE FORMULATION FOR PULMONARY DELIVERY
A. Formulation.
Bulk 34 amino acid active fragment of parathyroid hormone, PTH (1-34), was obtained from BACHEM CALIFORNIA, Torrance, CA. A 5.0o PTH (1-34) formulation was achieved by combining 0.375 mg PTH (1-34) per 1.0 mL deionized water with 6.06 mg/mL mannitol USP and 1.04 mg/mL citrate buffer (sodium citrate dihydrate USP and citric acid monohydrate USP) for a total solids concentration of 7.48 mg/mL at pH 6.3.
FOR SYSTEMIC APPLICATIONS
DRUG INDICATIONS
.
Calcitonin Osteoporosis Prophylaxis Paget's Disease Hypercalcemia Erthropoetin (EPO) Anemia Factor IX Hemophilia B
Granulocyte Colony Stimulating Neutropenia Factor (G-CSF) Granulocyte Macrophage Colony Bone Marrow Engraftment/Transplant Failure Stimulating Factor (GM-CSF) Growth Hormone Short Stature Renal Failure Heparin Blood Clotting Heparin (Low Molecular Weight) Blood Clotting Insulin Type I and Type II Diabetes Interferon Alpha Hepatitis B and C
Hairy Cell Leukemia Kaposi's Sarcoma Interferon Beta Multiple Sclerosis Interferon Gamma Chronic Granulomatous Disease Interleukin-2 Renal Cancer Luteinizing Hormone Releasing Prostate Cancer Hormone (LHRH) Endometriosis Somatostatin Analog Gastrointestinal Cancers Vasopressin Analog Diabetes Insipidus Bed Wetting Follicle Stimulating Hormone (FSH) Fertility Amylin Type I Diabetes Ciliary Neurotrophic Factor Lou Gehrig's Disease Growth Hormone Releasing Factor (GRF) Short Stature Insulin-Like Growth Factor Osteoporosis Nutritional Support Insulinotropin Type II Diabetes Interferon Beta Hepatitis B and C
Interferon Gamma Rheumatoid Arthritis Interleukin-1 Receptor Antagonist Rheumatoid Arthritis Interleukin-3 Adjuvant to Chemotherapy Interleukin-4 Immunodeficiency Disease Interleukin-6 Thrombocytopenia TABLE 1 - Continued SELECTED MACROMOLECULE DRUGS
FOR SYSTEMIC APPLICATIONS
DRUG INDICATIONS
Macrophage Colony Stimulating Fungal Disease Factor (M-CSF) Cancer Hypercholesterolemia Nerve Growth Factor Peripheral Neuropathies Parathyroid Hormone Osteoporosis Somatostatin Analog Refractory Diarrheas Thymosin Alpha 1 Hepatitis B and C
IIb/IIIa Inhibitor Unstable Angina Alpha-1 Antitrypsin Cystic Fibrosis Anti-RSV Antibody Respiratory Syncytial Virus Cystic Fibrosis Transmembrane Cystic Fibrosis Regulator (CFTR) Gene Deoxyribonuclease (DNase) Chronic Bronchitis Heparin Asthma Bactericidal/Permeability Adult Respiratory Distress Syndrome (ARDS) Increasing Protein (BPI) Anti-CMV Antibody Cytomegalovirus Interleukin-1 Receptor Asthma SELECTED NON-MACROMOLECULE DRUGS FOR SYSTEMIC
AND LOCAL LUNG APPLICATIONS
DRUG INDICATIONS
Pentaniidine isethiouate Pneumocystis carini pneumonia Albuterol sulfate Bronchospasm Metaproterenol sulfate Bronchial asthma Beclomethasone diprepionate Triamcinolone acetamide Budesonide acetonide Ipratropium bromide Flunisolide Cromolyn sodium Ergotamine Tartrate Migraines The following examples are offered by way of illustration and not limitation.
EXPERIMENTAL
According the subject invention, the following dispersible dry powder formulations were prepared as described. All compositions produced according to the present 5 invention meet the strict specifications for content and purity required of pharmaceutical products.
EXAMPLE I
10 20.0% INSIILIN FORMULATION FOR PULMONARY DELIVERY
A. Formulation.
Bulk crystalline human zinc insulin, was obtained from Eli Lilly and Company, Indianapolis, IN. A 209i; insulin 15 formulation was achieved by combining 1.5 mg insulin per 1.0 mL deionized water with 4.96 mg/mL USP mannitol and 1.04 mg/mL
citrate buffer (sodium citrate dihydrate USP and citric acid monohydrate USP) for a total solids concentration of 7.5 mg/mL
at pH 6.7 0.3.
B . Spray Drying.
A dry powder of the 20o insulin formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 2-8 C
Inlet temperature 120-122 C
Feed rate 5.3 mL/min Outlet temperature 80-81 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at < 80 C for about 10 minutes by slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The above 2091; insulin dry powder composition contained 66.1% mannitol and 13.9% citrate. The composition was found to contain 1.1 to 2.0a moisture as measured by a columbic Karl Fischer method using a Mitsubishi CA-06 Moisture Meter.
The particle size distribution of the composition was measured by liquid centrifugal sedimentation in a Horiba CAPA-700 Particle Size Analyzer following dispersion of the powder on Sedisperse A-11 (Micrometrics, Norcross, GA) and was determined to be 1.3 m to 1.5 m MMD.
The delivered dose of the insulin powder composition was measured by collecting the aerosol powder produced by a dry powder dispersion device, similar to devices described in co-pending U.S. Application Serial Numbers 07/910,048;
08/313,707; 08/309,691 and PCT/US92/05621, the disclosures of which are hereby incorporated by reference, on a filter placed over the device mouthpiece. The delivered dose of the insulin powder composition was determined to be 563 16 g or 60 to 64's of the total powder (5.0 mg) loaded into the device.
The aerosol particle size distribution, measured using a cascade impactor (California Measurements IMPAQ-6), was determined to be 2.0 Am MMAD, with 86o to 900 of the particles < 5.0 E.cm in diameter.
The insulin content of the powder, measured by reverse phase HPLC (rpHPLC) was determined to be 197 g/mg powder, accounting for 99% of the expected insulin. No degradation peaks were detected in the chromatogram.
EXAMPLE II
5.0% PARATHYROID HORMONE FORMULATION FOR PULMONARY DELIVERY
A. Formulation.
Bulk 34 amino acid active fragment of parathyroid hormone, PTH (1-34), was obtained from BACHEM CALIFORNIA, Torrance, CA. A 5.0o PTH (1-34) formulation was achieved by combining 0.375 mg PTH (1-34) per 1.0 mL deionized water with 6.06 mg/mL mannitol USP and 1.04 mg/mL citrate buffer (sodium citrate dihydrate USP and citric acid monohydrate USP) for a total solids concentration of 7.48 mg/mL at pH 6.3.
B. Spray Dryincr.
A dry powder of the 5.0% PTH (1-34) formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 2-8 C
Inlet temperature 122-124 C
Feed rate 5.2 mL/min Outlet temperature 73-74 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at < 80 C for about 5 minutes by slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in Example I unless indicated otherwise.
The above 5.0% PTH (1-34) dry powder composition contained 81.0% mannitol and 13.9% citrate. The formulation contained 0.5% moisture.
The particle size distribution of the composition was determined to be 2.4 Am and 2.7 m MMD in separate measurements.
The delivered dose of the PTH (1-34) powder was determined to be 161 g or 64.5% and 175 g or 69.2% in separate measurements.
The PTH (1-34) content of the powder, measured by rpHPLC was determined to be 48.5 g/mg powder, accounting for 97% of the expected value. No degradation peaks were detected in the chromatogram.
A dry powder of the 5.0% PTH (1-34) formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 2-8 C
Inlet temperature 122-124 C
Feed rate 5.2 mL/min Outlet temperature 73-74 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at < 80 C for about 5 minutes by slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in Example I unless indicated otherwise.
The above 5.0% PTH (1-34) dry powder composition contained 81.0% mannitol and 13.9% citrate. The formulation contained 0.5% moisture.
The particle size distribution of the composition was determined to be 2.4 Am and 2.7 m MMD in separate measurements.
The delivered dose of the PTH (1-34) powder was determined to be 161 g or 64.5% and 175 g or 69.2% in separate measurements.
The PTH (1-34) content of the powder, measured by rpHPLC was determined to be 48.5 g/mg powder, accounting for 97% of the expected value. No degradation peaks were detected in the chromatogram.
EXAMPLE III
0.7% INTERLEUKIN-1 RECEPTOR FORMULATION FOR PULMONARY DELIVERY
A. Formulation.
Bulk interleukin-1 receptor, IL-1 receptor, was obtained from Immunex Corporation, Seattle, WA. A 0.7o IL-i receptor formulation was achieved by combining 0.053 mg IL-i receptor per 1.0 mL deionized water with 7.07 mg/mL raffinose (Pfanstiehl, Waukegan, IL) and 0.373 mg/mL Tris buffer at pH
7.18.
B. Spray Drying.
A dry powder of the 0.7o IL-i receptor formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 2-8 C
Inlet temperature 135-137 C
Feed rate 4.9 mL/min Outlet temperature 92-93 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at 90 C for about 15 minutes by slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in Example I unless indicated otherwise.
The above 0.715 IL-1 receptor dry powder composition contained 94.395 raffinose and 5.0% Tris. The formulation contained 1.84 0.25o moisture.
The particle size distribution of the composition was determined to be 1.95 Am MMD with 1000 of the particles <
5.0 E.cm.
The delivered dose of the IL-1 receptor powder was determined to be 22.3 2.0 gg or 53.4 4.70.
WO 96/32149 PCTlUS96/05070 The aerosol particle size distribution, was determined to be 3.2 /cm MMAD, with 77!k of the particles < 5.0 m in diameter.
The IL-1 receptor content of the powder as measured by rpHPLC was determined to be 8.4 g/mg, accounting for 120%
of the expected IL-1 receptor. No degradation peaks were detected in the chromatogram.
EXAMPLE IV
5.0% INTERLEUKIN-1 RECEPTOR FORMULATION FOR PULMONARY DELIVERY
A. Formulation.
Bulk interleukin-1 receptor, IL-1 receptor, was obtained from Immunex Corporation, Seattle, WA. A 5.001 IL-i receptor formulation was achieved by combining 0.375 mg IL-1 receptor per 1.0 mL deionized water with 6.77 mg/mL raffinose and 0.351 mg/mL Tris buffer at pH 7.35.
B. Snrav Drying.
A dry powder of the 5.0% IL-i receptor formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 2-8 C
Inlet temperature 138 C
Feed rate 4.9 mL/min Outlet temperature 91 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at 90 C for about 15 minutes by slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in Example I unless indicated otherwise.
The above 5.0o IL-i receptor dry powder composition contained 90.3% raffinose and 4.7% Tris. The formulation contained 1.75 0.26% moisture.
The particle size distribution of the composition 5 was determined to be 2.74 m MMD with 970 of the particles <
5.0 m.
The delivered dose of the IL-1 receptor powder was determined to be 123.4 24.5 g or 49.3 9.80.
The aerosol particle size distribution, was 10 determined to be 4.1 m MMAD, with 640 of the particles < 5.0 um in diameter.
The IL-1 receptor content of the powder as measured by rpHPLC was determined to be 52.7 1.8 gg/mg, accounting for 105a of the expected IL-i receptor. No degradation peaks 15 were detected in the chromatogram.
EXAMPLE V
26.7% HUMAN CALCITONIN FORMULATION FOR PULMONARY DELIVERY
A. Formulation.
Bulk human calcitonin was obtained from Ciba-Geigy.
A 26.7% human calcitonin formulation was achieved by combining 1.9 mg human calcitonin per 1.0 mL deionized water with 4.3 mg/mL mannitol and 0.9 mg/mL citrate buffer at pH 3.85.
B. Spray Drying.
A dry powder of the 26.7o human calcitonin formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 4 C
Inlet temperature 119 C
Feed rate 5.5 mL/min Outlet temperature 78 C
Atomizer coolant temperature 0-5 C
Cyclone coolant temperature 25-30 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at 80 C for about 10 minutes by slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in Example I unless indicated otherwise.
The above 26.7o human calcitonin dry powder composition contained 60o mannitol and 13.311 citrate. The formulation contained 0.71% moisture.
The particle size distribution of the composition was determined to be 1.33 0.63 m MMD.
The delivered dose of the human calcitonin powder was determined to be 76.8 6.7%.
The human calcitonin content of the powder as measured by rpHPLC was determined to be 272.0 g/mg, accounting for 102 1.70 of the expected human calcitonin. -No degradation peaks were detected in the chromatogram.
EXAMPLE VI
90% ALPHA-1 ANTITRYPSIN FORMULATION FOR PULMONARY DELIVERY
A. Formulation.
Bulk alpha-i antitrypsin, AlA, was obtained from Armour Pharmaceutical Company, Kankakee, IL. A 90o AlA
formulation was achieved by combining 4.89 mg AlA per 1.0 mL
deionized water with 0.54 mg/mL citrate buffer at pH 6Ø
B. Spray Drying.
A dry powder of the 90o A1A formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 4 C
Inlet temperature 98-101 C
Feed rate 5.0 mL/min Outlet temperature 65 C
Atomizer coolant temperature 2-8 C
Cyclone coolant temperature 30 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at 69 C for about 10 minutes by slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in Example I unless indicated otherwise.
The above 90% AlA dry powder composition contained 10.0% citrate. The formulation contained 4.79% moisture.
The particle size distribution of the composition was determined to be 1.71 0.87 m MMD.
The delivered dose of the 90% AlA powder was determined to be 67.0 5.0%.
The aerosol particle size distribution, was determined to be 1.0 m MMAD, with 90% of the particles < 5.0 m in diameter.
The AlA content of the powder as measured by rpHPLC
was determined to be 80% of the expected value. No degradation peaks were detected in the chromatogram. The activity after spray drying was determined to be 74 1%
EXAMPLE VII
0.3% BETA INTERFERON FORMULATION FOR PULMONARY DELIVERY
CONTAINING HUMAN SERUM ALBUMIN
A. Formulation.
Bulk beta interferon, IFN-(3, was obtained from Toray Industries, Inc., Tokyo, Japan. A 0.3% IFN-(3 formulation was achieved by combining 0.025 mg IFN-(3 per 1.0 mL deionized water with 5.54 mg/mL human serum albumin (HSA), 2.3 mg/mL
citrate buffer and 0.345 mg/mL of NaCl at pH 4.5.
B. Sprav Dryincr.
A dry powder of the 0.3o IFN-0 formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 2-8 C
Inlet temperature 93 C
Feed rate 2.7 mL/min Outlet temperature 62 C
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in Example I unless indicated otherwise.
The above 0.3% IFN-(3 dry powder composition contained 66.0% HSA, 27.4% citrate, 4.1o NaCl. The formulation contained 4.22% moisture.
The particle size distribution of the composition was determined to be 1.62 m MMD with 94.80 of the particles <
5 m.
The delivered dose of the 0.3% IFN-0 powder was determined to be 9.9 g/mg or 66.0 4.00.
The aerosol particle size distribution, was determined to be 2.0 um MMAD, with 850 of the particles < 5.0 m in diameter.
The IFN-0 activity of the powder as measured by IFN-P enzyme immunoassay (Toray-Fuji Bionics) and was determined to be 109 80 of the expected activity.
EXAMPLE VIII
0.3% BETA INTERFERON FORMULATION FOR PULMONARY DELIVERY
CONTAINING RAFFINOSE
A. Formulation.
Bulk beta interferon, IFN-0, was obtained from Toray Industries, Inc., Tokyo, Japan. A 0.3% IFN-0 formulation was achieved by combining 0.025 mg IFN-A per 1.0 mL deionized water with 4.7 mg/mL raffinose, 1.0 mg/mL human serum albumin (HSA), 2.3 mg/mL citrate buffer and 0.3 mg/mL of NaCl at pH
4.5.
~
B. Srnray Drying.
A dry powder of the 0.3% IFN-6 formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 2-8 C
Inlet temperature 145 C
Feed rate 5.0 mL/min Outlet temperature 87 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at 97 C for about 5 minutes by slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in Example I unless indicated otherwise.
The above 0.315 IFN-9 dry powder composition contained 56.49,; raffinose, 11.911; HSA, 27.4o citrate, 3.5%
NaCl. The formulation contained 0.69% moisture.
The particle size distribution of the composition -was determined to be 2.06 m MMD with 88.90 of the particles <
5 m.
The delivered dose.of the 0.3o IFN-g powder was determined to be 10.2 g/mg or 68.0 2.0%.
The aerosol particle size distribution, was determined to be 2.5 Am MMAD, with 84% of the particles < S.0 m in diameter.
The IFN-g activity of the powder as measured by IFN-(3 enzyme immunoassay (Toray-Fuji Bionics) and was determined to be 109 8% of the expected activity.
EXAMPLE IX
93% LOW MOLECULAR WEIGHT HEPARIN FORMULATION
FOR PULMONARY DELIVERY
5 A. Formulation.
Bulk low molecular weight heparin sodium salt (Av.
Mol. Wt.: Approx. 6000) from porcine intestinal mucosa, heparin (LMW), was obtained from Sigma Chemical, St. Louis, MO.. A 93o heparin (LMW) formulation was achieved by 10 combining 6.9 mg heparin (LMW) per 1.0 mL deionized water with 0.5 mg/mL HSA at pH 6.9.
B. Spray Drying.
A dry powder of the 932k heparin (LMW) formulation described above was produced by spray drying the aqueous 15 mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 2-8 C
Inlet temperature 140 C
Feed rate 3.8 mL/min 20 Outlet temperature 85 C
Atomizer coolant temperature 2-8 C
Cyclone coolant temperature 20 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at 80 C for about 10 minutes by 25 slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in Example I unless indicated otherwise.
The above 93% heparin (LMW) dry powder composition contained 7.0o HSA.
The delivered dose of the 93% heparin (LMW) powder was determined to be 60.0 1.0a.
The aerosol particle size distribution, was determined to be 3.5 N.m MMAD, with 70% of the particles < 5.0 ~um in diameter.
EXAMPLE X
97% UNFR.ACTIONATED HEPARIN FORMULATION FOR PULMONARY DELIVERY
t A. Formulation.
Bulk unfractionated heparin sodium salt from porcine intestinal mucosa, heparin, was obtained from Sigma Chemical, St. Louis, MO. A 97% heparin formulation was achieved by combining 7.0 mg heparin per 1.0 mL deionized water with 0.25 mg/mL HSA at pH 6.55.
B. Snrav Drying.
A dry powder of the 97% heparin formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 2-8 C
Inlet temperature 150 C
Feed rate 4.0 mL/min Outlet temperature 85 C
Atomizer coolant temperature 2-8 C
Cyclone coolant temperature 20 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at 80 C for about 10 minutes by slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in Example I unless indicated otherwise.
The above 97% heparin dry powder composition contained 3.0o HSA. The formulation contained 5.11o moisture.
The particle size distribution of the composition was determined to be 2.0 to 2.5 E.r.m MMD.
The delivered dose of the 97% heparin powder was determined to be 79.0 6.0%.
WO 96/32149 PCTlUS96/05070 The aerosol particle size distribution, was determined to be 3.2 m MMAD, with 70% of the particles < 5.0 m in diameter.
.
EXAMPLE XI
LIPID VECTOR GENE FORMULATION FOR PULMONARY DELIVERY
A. Formulation.
Bulk pCMVP DNA:Lipid vector was obtained from Genzyme Corporation, Cambridge, MA. A 0.71% DNA:Lipid vector formulation was achieved by combining 0.005:0.03 mg DNA:Lipid vector per 1.0 mL deionized water with 5.3 mg/mL glycine (J.T.
Baker) 0.3 mg/mL HSA at pH 6.4.
B. Spray Drying.
A dry powder of the DNA:Lipid vector formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 2-8 C
Inlet temperature 120 C
Feed rate 3.8 mL/min Outlet temperature 71 C
Atomizer coolant temperature 2-8 C
Cyclone coolant temperature 2-8 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at 65 C for about 5 minutes by slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in Example I unless indicated otherwise.
The above 0.71% DNA:Lipid vector dry powder composition contained 93.97o glycine, and 5.32% HSA.
The particle size distribution of the composition was determined to be 2.0 m MMD.
The delivered dose of the 9715 heparin (HMW) powder was determined to be 64.0 1.00.
The aerosol particle size distribution, was determined to be 2.4 gm MMAD, with 75% of the particles < 5.0 m in diameter.
Activity after spray drying was determined to be 160% of the expected value.
EXAMPLE XII
ADENOVIRAL VECTOR GENE FORMULATION FOR PULMONARY DELIVERY
A. Formulation.
Bulk pCMV/3 DNA:Adenovirous vector was obtained from Genzyme Corporation, Cambridge, MA. A DNA:adenovirous vector formulation was achieved by combining 108 PFU/mL DNA:Lipid vector per 1.0 mL deionized water with 6.1 mg/mL glycine J.T.
Baker) 2.5 mg/mL HSA, 1.9 mg/mL phosphate buffer at pH 7.4.
B. Sprav Drying.
A dry powder of the DNA:Lipid vector formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 2-8 C
Inlet temperature 105 C
Feed rate 2.9 mL/min Outlet temperature 72 C
Atomizer coolant temperature 2-8 C
Cyclone coolant temperature 20 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at 70 C for about 10 minutes by slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in ExamDle I unless indicated otherwise.
The above DNA:adenovirous vector dry powder composition contained 58% glycine, and 24% HSA and 18%
phosphate buffer.
The particle size distribution of the composition was determined to be 2.3 gm MMD.
The delivered dose of the 97 s heparin (HMW) powder was determined to be 51.0 1.0a.
The aerosol particle size distribution, was determined to be 1.8 um MMAD, with 80% of the particles < 5.0 m in diameter.
Activity after spray drying was determined to be 760 of the expected value.
The invention now being fully described, it will be apparent to one of ordinary skill in the art that many changes and modifications can be made thereto without departing from the spirit or scope of the appended claims.
0.7% INTERLEUKIN-1 RECEPTOR FORMULATION FOR PULMONARY DELIVERY
A. Formulation.
Bulk interleukin-1 receptor, IL-1 receptor, was obtained from Immunex Corporation, Seattle, WA. A 0.7o IL-i receptor formulation was achieved by combining 0.053 mg IL-i receptor per 1.0 mL deionized water with 7.07 mg/mL raffinose (Pfanstiehl, Waukegan, IL) and 0.373 mg/mL Tris buffer at pH
7.18.
B. Spray Drying.
A dry powder of the 0.7o IL-i receptor formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 2-8 C
Inlet temperature 135-137 C
Feed rate 4.9 mL/min Outlet temperature 92-93 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at 90 C for about 15 minutes by slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in Example I unless indicated otherwise.
The above 0.715 IL-1 receptor dry powder composition contained 94.395 raffinose and 5.0% Tris. The formulation contained 1.84 0.25o moisture.
The particle size distribution of the composition was determined to be 1.95 Am MMD with 1000 of the particles <
5.0 E.cm.
The delivered dose of the IL-1 receptor powder was determined to be 22.3 2.0 gg or 53.4 4.70.
WO 96/32149 PCTlUS96/05070 The aerosol particle size distribution, was determined to be 3.2 /cm MMAD, with 77!k of the particles < 5.0 m in diameter.
The IL-1 receptor content of the powder as measured by rpHPLC was determined to be 8.4 g/mg, accounting for 120%
of the expected IL-1 receptor. No degradation peaks were detected in the chromatogram.
EXAMPLE IV
5.0% INTERLEUKIN-1 RECEPTOR FORMULATION FOR PULMONARY DELIVERY
A. Formulation.
Bulk interleukin-1 receptor, IL-1 receptor, was obtained from Immunex Corporation, Seattle, WA. A 5.001 IL-i receptor formulation was achieved by combining 0.375 mg IL-1 receptor per 1.0 mL deionized water with 6.77 mg/mL raffinose and 0.351 mg/mL Tris buffer at pH 7.35.
B. Snrav Drying.
A dry powder of the 5.0% IL-i receptor formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 2-8 C
Inlet temperature 138 C
Feed rate 4.9 mL/min Outlet temperature 91 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at 90 C for about 15 minutes by slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in Example I unless indicated otherwise.
The above 5.0o IL-i receptor dry powder composition contained 90.3% raffinose and 4.7% Tris. The formulation contained 1.75 0.26% moisture.
The particle size distribution of the composition 5 was determined to be 2.74 m MMD with 970 of the particles <
5.0 m.
The delivered dose of the IL-1 receptor powder was determined to be 123.4 24.5 g or 49.3 9.80.
The aerosol particle size distribution, was 10 determined to be 4.1 m MMAD, with 640 of the particles < 5.0 um in diameter.
The IL-1 receptor content of the powder as measured by rpHPLC was determined to be 52.7 1.8 gg/mg, accounting for 105a of the expected IL-i receptor. No degradation peaks 15 were detected in the chromatogram.
EXAMPLE V
26.7% HUMAN CALCITONIN FORMULATION FOR PULMONARY DELIVERY
A. Formulation.
Bulk human calcitonin was obtained from Ciba-Geigy.
A 26.7% human calcitonin formulation was achieved by combining 1.9 mg human calcitonin per 1.0 mL deionized water with 4.3 mg/mL mannitol and 0.9 mg/mL citrate buffer at pH 3.85.
B. Spray Drying.
A dry powder of the 26.7o human calcitonin formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 4 C
Inlet temperature 119 C
Feed rate 5.5 mL/min Outlet temperature 78 C
Atomizer coolant temperature 0-5 C
Cyclone coolant temperature 25-30 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at 80 C for about 10 minutes by slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in Example I unless indicated otherwise.
The above 26.7o human calcitonin dry powder composition contained 60o mannitol and 13.311 citrate. The formulation contained 0.71% moisture.
The particle size distribution of the composition was determined to be 1.33 0.63 m MMD.
The delivered dose of the human calcitonin powder was determined to be 76.8 6.7%.
The human calcitonin content of the powder as measured by rpHPLC was determined to be 272.0 g/mg, accounting for 102 1.70 of the expected human calcitonin. -No degradation peaks were detected in the chromatogram.
EXAMPLE VI
90% ALPHA-1 ANTITRYPSIN FORMULATION FOR PULMONARY DELIVERY
A. Formulation.
Bulk alpha-i antitrypsin, AlA, was obtained from Armour Pharmaceutical Company, Kankakee, IL. A 90o AlA
formulation was achieved by combining 4.89 mg AlA per 1.0 mL
deionized water with 0.54 mg/mL citrate buffer at pH 6Ø
B. Spray Drying.
A dry powder of the 90o A1A formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 4 C
Inlet temperature 98-101 C
Feed rate 5.0 mL/min Outlet temperature 65 C
Atomizer coolant temperature 2-8 C
Cyclone coolant temperature 30 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at 69 C for about 10 minutes by slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in Example I unless indicated otherwise.
The above 90% AlA dry powder composition contained 10.0% citrate. The formulation contained 4.79% moisture.
The particle size distribution of the composition was determined to be 1.71 0.87 m MMD.
The delivered dose of the 90% AlA powder was determined to be 67.0 5.0%.
The aerosol particle size distribution, was determined to be 1.0 m MMAD, with 90% of the particles < 5.0 m in diameter.
The AlA content of the powder as measured by rpHPLC
was determined to be 80% of the expected value. No degradation peaks were detected in the chromatogram. The activity after spray drying was determined to be 74 1%
EXAMPLE VII
0.3% BETA INTERFERON FORMULATION FOR PULMONARY DELIVERY
CONTAINING HUMAN SERUM ALBUMIN
A. Formulation.
Bulk beta interferon, IFN-(3, was obtained from Toray Industries, Inc., Tokyo, Japan. A 0.3% IFN-(3 formulation was achieved by combining 0.025 mg IFN-(3 per 1.0 mL deionized water with 5.54 mg/mL human serum albumin (HSA), 2.3 mg/mL
citrate buffer and 0.345 mg/mL of NaCl at pH 4.5.
B. Sprav Dryincr.
A dry powder of the 0.3o IFN-0 formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 2-8 C
Inlet temperature 93 C
Feed rate 2.7 mL/min Outlet temperature 62 C
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in Example I unless indicated otherwise.
The above 0.3% IFN-(3 dry powder composition contained 66.0% HSA, 27.4% citrate, 4.1o NaCl. The formulation contained 4.22% moisture.
The particle size distribution of the composition was determined to be 1.62 m MMD with 94.80 of the particles <
5 m.
The delivered dose of the 0.3% IFN-0 powder was determined to be 9.9 g/mg or 66.0 4.00.
The aerosol particle size distribution, was determined to be 2.0 um MMAD, with 850 of the particles < 5.0 m in diameter.
The IFN-0 activity of the powder as measured by IFN-P enzyme immunoassay (Toray-Fuji Bionics) and was determined to be 109 80 of the expected activity.
EXAMPLE VIII
0.3% BETA INTERFERON FORMULATION FOR PULMONARY DELIVERY
CONTAINING RAFFINOSE
A. Formulation.
Bulk beta interferon, IFN-0, was obtained from Toray Industries, Inc., Tokyo, Japan. A 0.3% IFN-0 formulation was achieved by combining 0.025 mg IFN-A per 1.0 mL deionized water with 4.7 mg/mL raffinose, 1.0 mg/mL human serum albumin (HSA), 2.3 mg/mL citrate buffer and 0.3 mg/mL of NaCl at pH
4.5.
~
B. Srnray Drying.
A dry powder of the 0.3% IFN-6 formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 2-8 C
Inlet temperature 145 C
Feed rate 5.0 mL/min Outlet temperature 87 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at 97 C for about 5 minutes by slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in Example I unless indicated otherwise.
The above 0.315 IFN-9 dry powder composition contained 56.49,; raffinose, 11.911; HSA, 27.4o citrate, 3.5%
NaCl. The formulation contained 0.69% moisture.
The particle size distribution of the composition -was determined to be 2.06 m MMD with 88.90 of the particles <
5 m.
The delivered dose.of the 0.3o IFN-g powder was determined to be 10.2 g/mg or 68.0 2.0%.
The aerosol particle size distribution, was determined to be 2.5 Am MMAD, with 84% of the particles < S.0 m in diameter.
The IFN-g activity of the powder as measured by IFN-(3 enzyme immunoassay (Toray-Fuji Bionics) and was determined to be 109 8% of the expected activity.
EXAMPLE IX
93% LOW MOLECULAR WEIGHT HEPARIN FORMULATION
FOR PULMONARY DELIVERY
5 A. Formulation.
Bulk low molecular weight heparin sodium salt (Av.
Mol. Wt.: Approx. 6000) from porcine intestinal mucosa, heparin (LMW), was obtained from Sigma Chemical, St. Louis, MO.. A 93o heparin (LMW) formulation was achieved by 10 combining 6.9 mg heparin (LMW) per 1.0 mL deionized water with 0.5 mg/mL HSA at pH 6.9.
B. Spray Drying.
A dry powder of the 932k heparin (LMW) formulation described above was produced by spray drying the aqueous 15 mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 2-8 C
Inlet temperature 140 C
Feed rate 3.8 mL/min 20 Outlet temperature 85 C
Atomizer coolant temperature 2-8 C
Cyclone coolant temperature 20 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at 80 C for about 10 minutes by 25 slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in Example I unless indicated otherwise.
The above 93% heparin (LMW) dry powder composition contained 7.0o HSA.
The delivered dose of the 93% heparin (LMW) powder was determined to be 60.0 1.0a.
The aerosol particle size distribution, was determined to be 3.5 N.m MMAD, with 70% of the particles < 5.0 ~um in diameter.
EXAMPLE X
97% UNFR.ACTIONATED HEPARIN FORMULATION FOR PULMONARY DELIVERY
t A. Formulation.
Bulk unfractionated heparin sodium salt from porcine intestinal mucosa, heparin, was obtained from Sigma Chemical, St. Louis, MO. A 97% heparin formulation was achieved by combining 7.0 mg heparin per 1.0 mL deionized water with 0.25 mg/mL HSA at pH 6.55.
B. Snrav Drying.
A dry powder of the 97% heparin formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 2-8 C
Inlet temperature 150 C
Feed rate 4.0 mL/min Outlet temperature 85 C
Atomizer coolant temperature 2-8 C
Cyclone coolant temperature 20 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at 80 C for about 10 minutes by slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in Example I unless indicated otherwise.
The above 97% heparin dry powder composition contained 3.0o HSA. The formulation contained 5.11o moisture.
The particle size distribution of the composition was determined to be 2.0 to 2.5 E.r.m MMD.
The delivered dose of the 97% heparin powder was determined to be 79.0 6.0%.
WO 96/32149 PCTlUS96/05070 The aerosol particle size distribution, was determined to be 3.2 m MMAD, with 70% of the particles < 5.0 m in diameter.
.
EXAMPLE XI
LIPID VECTOR GENE FORMULATION FOR PULMONARY DELIVERY
A. Formulation.
Bulk pCMVP DNA:Lipid vector was obtained from Genzyme Corporation, Cambridge, MA. A 0.71% DNA:Lipid vector formulation was achieved by combining 0.005:0.03 mg DNA:Lipid vector per 1.0 mL deionized water with 5.3 mg/mL glycine (J.T.
Baker) 0.3 mg/mL HSA at pH 6.4.
B. Spray Drying.
A dry powder of the DNA:Lipid vector formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 2-8 C
Inlet temperature 120 C
Feed rate 3.8 mL/min Outlet temperature 71 C
Atomizer coolant temperature 2-8 C
Cyclone coolant temperature 2-8 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at 65 C for about 5 minutes by slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in Example I unless indicated otherwise.
The above 0.71% DNA:Lipid vector dry powder composition contained 93.97o glycine, and 5.32% HSA.
The particle size distribution of the composition was determined to be 2.0 m MMD.
The delivered dose of the 9715 heparin (HMW) powder was determined to be 64.0 1.00.
The aerosol particle size distribution, was determined to be 2.4 gm MMAD, with 75% of the particles < 5.0 m in diameter.
Activity after spray drying was determined to be 160% of the expected value.
EXAMPLE XII
ADENOVIRAL VECTOR GENE FORMULATION FOR PULMONARY DELIVERY
A. Formulation.
Bulk pCMV/3 DNA:Adenovirous vector was obtained from Genzyme Corporation, Cambridge, MA. A DNA:adenovirous vector formulation was achieved by combining 108 PFU/mL DNA:Lipid vector per 1.0 mL deionized water with 6.1 mg/mL glycine J.T.
Baker) 2.5 mg/mL HSA, 1.9 mg/mL phosphate buffer at pH 7.4.
B. Sprav Drying.
A dry powder of the DNA:Lipid vector formulation described above was produced by spray drying the aqueous mixture using a Buchi Laboratory Spray Dryer under the following conditions:
Temperature of aqueous mixture 2-8 C
Inlet temperature 105 C
Feed rate 2.9 mL/min Outlet temperature 72 C
Atomizer coolant temperature 2-8 C
Cyclone coolant temperature 20 C
Once the aqueous mixture was consumed, the outlet temperature was maintained at 70 C for about 10 minutes by slowly decreasing the inlet temperature to provide a secondary drying.
C. Characterization.
The following characterization of the dry powder formulation described above was carried out using the methods described in ExamDle I unless indicated otherwise.
The above DNA:adenovirous vector dry powder composition contained 58% glycine, and 24% HSA and 18%
phosphate buffer.
The particle size distribution of the composition was determined to be 2.3 gm MMD.
The delivered dose of the 97 s heparin (HMW) powder was determined to be 51.0 1.0a.
The aerosol particle size distribution, was determined to be 1.8 um MMAD, with 80% of the particles < 5.0 m in diameter.
Activity after spray drying was determined to be 760 of the expected value.
The invention now being fully described, it will be apparent to one of ordinary skill in the art that many changes and modifications can be made thereto without departing from the spirit or scope of the appended claims.
Claims (53)
1. A method for preparing a dry powder composition for pulmonary administration, which method comprises:
(a) providing an aqueous mixture comprising a pharmaceutically active macromolecule and a pharmaceutically acceptable carrier; and (b) spray drying the aqueous mixture from step (a) at a temperature in the range from 50°C to 200°C to provide a dry powder composition for pulmonary administration comprising a therapeutically effective amount of said pharmaceutically active macromolecule and said pharmaceutically acceptable carrier, wherein said pharmaceutically active macromolecule retains its activity upon spray drying, and wherein said pharmaceutically active macromolecule is neither insulin nor an interferon.
(a) providing an aqueous mixture comprising a pharmaceutically active macromolecule and a pharmaceutically acceptable carrier; and (b) spray drying the aqueous mixture from step (a) at a temperature in the range from 50°C to 200°C to provide a dry powder composition for pulmonary administration comprising a therapeutically effective amount of said pharmaceutically active macromolecule and said pharmaceutically acceptable carrier, wherein said pharmaceutically active macromolecule retains its activity upon spray drying, and wherein said pharmaceutically active macromolecule is neither insulin nor an interferon.
2. The method of claim 1, wherein the macromolecule is selected from the group consisting of erythropoietin, factor IX, G-CSF, GM-CSF, growth hormone, interleukin-2, LHRH, somatostatin analog, vasopressin analog, FSH, amylin, ciliary neurotophic factor, interleukin-3, interleukin-4, M-CSF, nerve growth factor, thymosin alpha-1, IIb/IIIa inhibitor, alpha-1 antitrypsin, anti-RSV antibody, CFTR
gene, DNase, BPI protein, anti-CMV antibody, growth hormone releasing factor, insulin-like growth factor, insulinotropin, interleukin-1 receptor antagonist, parathyroid hormone, interleukin 1 receptor, heparin, low molecular weight heparin, and calcitonin.
gene, DNase, BPI protein, anti-CMV antibody, growth hormone releasing factor, insulin-like growth factor, insulinotropin, interleukin-1 receptor antagonist, parathyroid hormone, interleukin 1 receptor, heparin, low molecular weight heparin, and calcitonin.
3. The method of claim 1 or 2, further comprising the step of:
(c) dispersing an amount of said composition in a gas stream to form an aerosol.
(c) dispersing an amount of said composition in a gas stream to form an aerosol.
4. The method of any one of claims 1 to 3, wherein the carrier is substantially free from penetration enhancers.
5. The method of any one of claims 1 to 4, wherein said carrier is selected from the group consisting of (i) human serum albumin, (ii) carbohydrates selected from the group consisting of monosaccharides, disaccharides, cyclodextrins, maltodextrins, raffinose and alditols, (iii) amino acids and (iv) polypeptides.
6. The method of any one of claims 1 to 4, wherein said carrier is selected from the group consisting of galactose, D-mannose, sorbose, lactose, trehalose, 2-hydroxypropyl-.beta.-cyclodextrin, raffinose, mannitol, and xylitol.
7. The method of claim 5, wherein the carrier comprises human serum albumin.
8. The method of claim 6, wherein the carbohydrate is mannitol.
9. The method of any one claims 1 to 8, wherein the composition further comprises a hydrophobic amino acid as an additive.
10. The composition of claim 9, wherein said hydrophobic amino acid is selected from the group consisting of tryptophan, tyrosine, leucine and phenylalanine.
11. The method of any one of claims 1 to 10, wherein the composition has a moisture content below 10% by weight.
12. The method of claim 11, wherein the composition has a moisture content below 5% by weight.
13. The method of any one of claims 1 to 12, wherein 95% of the mass of the composition has a particle size less than 10 µm.
14. The method of any one of claims 1 to 13, wherein 80% of the mass of the composition has a particle size less than 5 µm.
15. The method of any one of claims 1 to 14, wherein the aqueous mixture is a homogeneous aqueous mixture.
16. The method of claim 15, wherein the aqueous mixture is a solution.
17. The method of any one of claims 1 to 16, wherein the composition contains less than 5% macromolecule degradation products.
18. The method of any one of claims 1 to 17, wherein the composition comprises particles having an aerosol particle size distribution of 1-5 µm MMAD.
19. The method of any one of claims 1 to 18, wherein the composition is non-liposomal.
20. The method of any one of claims 1 to 19, wherein the composition is aerosolizable in a dry powder inhaler.
21. The method of any one of claims 1 to 20, wherein the aqueous solution consists essentially of water as the solvent.
22. The method of any one of claims 1 to 21, wherein the pharmaceutically active macromolecule retains at least about 74% of its activity upon spray drying.
23. A spray-dried, dispersible dry powder composition for pulmonary delivery, said composition comprising particles comprised of a therapeutically effective amount of a pharmaceutically active macromolecule in combination with a pharmaceutically acceptable carrier with the proviso that the macromolecule is neither insulin nor an interferon, wherein the spray-dried, dispersible dry powder composition is prepared according to the method defined in any one of claims 1 to 22.
24. The composition of claim 23, wherein said macromolecule is selected from the group consisting of erythropoietin, factor IX, G-CSF, GM-CSF, growth hormone, interleukin-2, LHRH, somatostatin analog, vasopressin analog, amylin, ciliary neurotophic factor, interleukin-3, interleukin-4, M-CSF, nerve growth factor, parathyroid hormone, thymosin alpha-1, IIb/IIIa inhibitor, alpha-1 antitrypsin, anti-RSV antibody, CFTR gene, DNase, BPI protein, anti-CMV antibody, growth hormone releasing factor, insulin-like growth factor, insulinotropin, interleukin-1 receptor antagonist, interleukin 1 receptor, heparin, low molecular weight heparin, and calcitonin.
25. The composition of claim 23 or 24, wherein said macromolecule is selected from the group consisting of interleukin 1 receptor, heparin, low molecular weight heparin, and calcitonin.
26. The composition of claim 23, wherein the macromolecule is a nucleic acid.
27. The composition of any one of claims 23 to 26, wherein said carrier is selected from the group consisting of (i) human serum albumin, (ii) carbohydrates selected from the group consisting of monosaccharides, disaccharides, cyclodextrins, maltodextrins, raffinose and alditols, (iii) amino acids and (iv) polypeptides.
28. The composition of any one of claims 23 to 27, wherein said carrier is selected from the group consisting of galactose, D-mannose, sorbose, lactose, trehalose, 2-hydroxypropyl-.beta.-cyclodextrin, raffinose, mannitol, and xylitol.
29. The composition of any one of claims 23 to 27, wherein said carrier is an amino acid.
30. The composition of any one of claims 23 to 29, wherein the composition is substantially free from penetration enhancers.
31. The composition of any one of claims 23 to 30, wherein said composition further comprises a hydrophobic amino acid as an additive.
32. The composition of claim 31, wherein said hydrophobic amino acid is selected from the group consisting of tryptophan, tyrosine, leucine and phenylalanine.
33. The composition of any one of claims 23 to 32, comprising particles having a uniform distribution of the macromolecule and carrier.
34. The composition of any one of claims 23 to 33, wherein the moisture content is less than about 10% by weight of water.
35. The composition of any one of claims 23 to 34, wherein about 95% of the mass of the composition comprises particles having a particle size less than 10 µm.
36. The composition of any one of claims 23 to 35, comprising particles of a size ranging from 1.0 to 5.0 microns mass median diameter (MMD).
37. The composition of any one of claims 23 to 36, comprising particles having a particle size ranging from 1.0 to 4.0 microns mass median diameter (MMD).
38. The composition of any one of claims 23 to 37, comprising particles having an aerosol particle size distribution ranging from 1.0 to 5.0 microns mass median aerodynamic diameter (MMAD).
39. The composition of any one of claims 23 to 38, comprising particles having an aerosol particle size distribution ranging from 1.5 to 4.0 microns mass median aerodynamic diameter (MMAD).
40. The composition of any one of claims 23 to 39, comprising particles characterized by a delivered dose greater than 30%.
41. The composition of any one of claims 23 to 40, characterized by a delivered dose of greater than 60%.
42. The composition of any one of claims 23 to 41, having a homogenous constitution.
43. The composition of any one of claims 23 to 42, comprising less than 5%
degradation products.
degradation products.
44. The composition of any one of claims 23 to 43, wherein the composition is for pulmonary administration to a subject to permit dissolution of the composition in the fluid layer of the alveolar lining in the lung.
45. The composition of any one of claims 23 to 44, having a moisture content below 10% by weight.
46. The composition of any one of claims 23 to 45, wherein said macromolecule is for administration by inhalation to permit systemic absorption of said macromolecule in a rapid manner.
47. An aerosolized form of the dry powder composition defined in any one of claims 23 to 46.
48. A unit dosage form for pulmonary delivery of a pharmaceutically active macromolecule, which dosage form comprises a unit dosage receptacle containing the dispersible dry powder composition defined in any one of claims 23 to 46.
49. A method for aerosolizing a dry powder composition, which method comprises:
dispersing an amount of a dry powder composition defined in any one of claims 23 to 46 in a gas stream to form an aerosol; and capturing the aerosol in a chamber for subsequent inhalation of the aerosol by a patient.
dispersing an amount of a dry powder composition defined in any one of claims 23 to 46 in a gas stream to form an aerosol; and capturing the aerosol in a chamber for subsequent inhalation of the aerosol by a patient.
50. The method of any one of claims 1-22, wherein the macromolecule is neither insulin nor an interferon.
51. The method of any one of claims 1 to 22, wherein the spray-dried respirable powder produced in said spray-drying step is for pulmonary administration to a patient in need thereof to permit the systemic absorption of the macromolecule in a rapid manner.
52. A use of a physiologically effective amount of the dispersible pharmaceutical-based dry powder composition defined in any one of claims 23 to 46 for treating a disease state responsive to treatment by a pharmaceutical.
53. A use of a physiologically acceptable amount of a dispersible pharmaceutical-based dry powder composition defined in any one of claims 23 to 46 for the production of a medicament for treating a disease state responsive to treatment by a pharmaceutical.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/423,515 | 1995-04-14 | ||
| US08/423,515 US6582728B1 (en) | 1992-07-08 | 1995-04-14 | Spray drying of macromolecules to produce inhaleable dry powders |
| PCT/US1996/005070 WO1996032149A1 (en) | 1995-04-14 | 1996-04-12 | Pulmonary delivery of aerosolized medicaments |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2218116A1 CA2218116A1 (en) | 1996-10-17 |
| CA2218116C true CA2218116C (en) | 2009-12-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002218116A Expired - Fee Related CA2218116C (en) | 1995-04-14 | 1996-04-12 | Pulmonary delivery of aerosolized medicaments |
Country Status (11)
| Country | Link |
|---|---|
| US (10) | US6582728B1 (en) |
| EP (2) | EP1428524A1 (en) |
| JP (2) | JPH11503731A (en) |
| KR (1) | KR100466486B1 (en) |
| AT (1) | ATE261742T1 (en) |
| AU (1) | AU702150B2 (en) |
| CA (1) | CA2218116C (en) |
| DE (1) | DE69631881T2 (en) |
| ES (1) | ES2215191T3 (en) |
| MX (1) | MX9707855A (en) |
| WO (1) | WO1996032149A1 (en) |
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-
1995
- 1995-04-14 US US08/423,515 patent/US6582728B1/en not_active Expired - Lifetime
-
1996
- 1996-04-12 EP EP04075809A patent/EP1428524A1/en not_active Ceased
- 1996-04-12 AU AU54827/96A patent/AU702150B2/en not_active Ceased
- 1996-04-12 CA CA002218116A patent/CA2218116C/en not_active Expired - Fee Related
- 1996-04-12 ES ES96911738T patent/ES2215191T3/en not_active Expired - Lifetime
- 1996-04-12 KR KR1019970707278A patent/KR100466486B1/en not_active IP Right Cessation
- 1996-04-12 AT AT96911738T patent/ATE261742T1/en not_active IP Right Cessation
- 1996-04-12 EP EP96911738A patent/EP0825885B1/en not_active Revoked
- 1996-04-12 JP JP8531213A patent/JPH11503731A/en not_active Withdrawn
- 1996-04-12 MX MX9707855A patent/MX9707855A/en not_active IP Right Cessation
- 1996-04-12 WO PCT/US1996/005070 patent/WO1996032149A1/en active IP Right Grant
- 1996-04-12 DE DE69631881T patent/DE69631881T2/en not_active Revoked
-
1999
- 1999-11-22 US US09/447,753 patent/US6372258B1/en not_active Expired - Fee Related
-
2002
- 2002-02-01 US US10/066,106 patent/US20020127188A1/en not_active Abandoned
- 2002-02-08 US US10/072,430 patent/US6797258B2/en not_active Expired - Fee Related
- 2002-09-13 US US10/242,714 patent/US7097827B2/en not_active Expired - Lifetime
- 2002-12-06 US US10/313,961 patent/US20030198601A1/en not_active Abandoned
-
2003
- 2003-01-31 US US10/355,578 patent/US6921527B2/en not_active Expired - Fee Related
- 2003-03-14 US US10/388,814 patent/US20030185765A1/en not_active Abandoned
-
2006
- 2006-06-27 US US11/426,927 patent/US20070042048A1/en not_active Abandoned
-
2007
- 2007-01-26 US US11/627,884 patent/US20070122418A1/en not_active Abandoned
-
2008
- 2008-01-28 JP JP2008016775A patent/JP2008163033A/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| US6921527B2 (en) | 2005-07-26 |
| US6582728B1 (en) | 2003-06-24 |
| EP0825885A4 (en) | 1998-08-26 |
| US20030198601A1 (en) | 2003-10-23 |
| DE69631881D1 (en) | 2004-04-22 |
| US20030068279A1 (en) | 2003-04-10 |
| JP2008163033A (en) | 2008-07-17 |
| EP0825885B1 (en) | 2004-03-17 |
| KR100466486B1 (en) | 2005-06-16 |
| ATE261742T1 (en) | 2004-04-15 |
| CA2218116A1 (en) | 1996-10-17 |
| AU5482796A (en) | 1996-10-30 |
| US20030129141A1 (en) | 2003-07-10 |
| KR19980703878A (en) | 1998-12-05 |
| WO1996032149A1 (en) | 1996-10-17 |
| US20020117170A1 (en) | 2002-08-29 |
| MX9707855A (en) | 1998-02-28 |
| US20020127188A1 (en) | 2002-09-12 |
| JPH11503731A (en) | 1999-03-30 |
| US6797258B2 (en) | 2004-09-28 |
| EP1428524A1 (en) | 2004-06-16 |
| US20070122418A1 (en) | 2007-05-31 |
| EP0825885A1 (en) | 1998-03-04 |
| ES2215191T3 (en) | 2004-10-01 |
| US6372258B1 (en) | 2002-04-16 |
| US7097827B2 (en) | 2006-08-29 |
| US20030185765A1 (en) | 2003-10-02 |
| DE69631881T2 (en) | 2004-08-19 |
| AU702150B2 (en) | 1999-02-18 |
| US20070042048A1 (en) | 2007-02-22 |
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| EEER | Examination request | ||
| MKLA | Lapsed |