US20100331258A1 - memory in subjects with mini-mental state examination of 24-26 - Google Patents

memory in subjects with mini-mental state examination of 24-26 Download PDF

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Publication number
US20100331258A1
US20100331258A1 US12/666,611 US66661108A US2010331258A1 US 20100331258 A1 US20100331258 A1 US 20100331258A1 US 66661108 A US66661108 A US 66661108A US 2010331258 A1 US2010331258 A1 US 2010331258A1
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composition
uridine
subject
vitamin
per
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US12/666,611
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Patrick Joseph Gerardus Hendrikus Kamphuis
Martine Groenendijk
Anke Bongers
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Nutricia NV
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Nutricia NV
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Priority claimed from PCT/NL2007/050307 external-priority patent/WO2009002146A1/en
Priority claimed from PCT/NL2007/050306 external-priority patent/WO2009002145A1/en
Priority claimed from PCT/NL2007/050310 external-priority patent/WO2009002148A1/en
Priority claimed from PCT/NL2008/050124 external-priority patent/WO2009082203A1/en
Application filed by Nutricia NV filed Critical Nutricia NV
Assigned to N.V. NUTRICIA reassignment N.V. NUTRICIA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BONGERS, ANKE, GROENENDIJK, MARTINE, KAMPHUIS, PATRICK JOSEPH GERARDUS HENDRIKUS
Publication of US20100331258A1 publication Critical patent/US20100331258A1/en
Abandoned legal-status Critical Current

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/185Acids; Anhydrides, halides or salts thereof, e.g. sulfur acids, imidic, hydrazonic or hydroximic acids
    • A61K31/19Carboxylic acids, e.g. valproic acid
    • A61K31/20Carboxylic acids, e.g. valproic acid having a carboxyl group bound to a chain of seven or more carbon atoms, e.g. stearic, palmitic, arachidic acids
    • A61K31/202Carboxylic acids, e.g. valproic acid having a carboxyl group bound to a chain of seven or more carbon atoms, e.g. stearic, palmitic, arachidic acids having three or more double bonds, e.g. linolenic
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L33/00Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L33/00Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
    • A23L33/10Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L33/00Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
    • A23L33/10Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
    • A23L33/115Fatty acids or derivatives thereof; Fats or oils
    • A23L33/12Fatty acids or derivatives thereof
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L33/00Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
    • A23L33/10Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
    • A23L33/15Vitamins
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L33/00Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
    • A23L33/10Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
    • A23L33/16Inorganic salts, minerals or trace elements
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L33/00Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
    • A23L33/40Complete food formulations for specific consumer groups or specific purposes, e.g. infant formula
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/13Amines
    • A61K31/14Quaternary ammonium compounds, e.g. edrophonium, choline
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/33Heterocyclic compounds
    • A61K31/335Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
    • A61K31/35Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom
    • A61K31/352Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom condensed with carbocyclic rings, e.g. methantheline 
    • A61K31/3533,4-Dihydrobenzopyrans, e.g. chroman, catechin
    • A61K31/355Tocopherols, e.g. vitamin E
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61K31/33Heterocyclic compounds
    • A61K31/335Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
    • A61K31/365Lactones
    • A61K31/375Ascorbic acid, i.e. vitamin C; Salts thereof
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61K31/33Heterocyclic compounds
    • A61K31/395Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/435Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
    • A61K31/44Non condensed pyridines; Hydrogenated derivatives thereof
    • A61K31/4415Pyridoxine, i.e. Vitamin B6
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/557Eicosanoids, e.g. leukotrienes or prostaglandins
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/70Carbohydrates; Sugars; Derivatives thereof
    • A61K31/7042Compounds having saccharide radicals and heterocyclic rings
    • A61K31/7052Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides
    • A61K31/706Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom
    • A61K31/7064Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines
    • A61K31/7068Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines having oxo groups directly attached to the pyrimidine ring, e.g. cytidine, cytidylic acid
    • A61K31/7072Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines having oxo groups directly attached to the pyrimidine ring, e.g. cytidine, cytidylic acid having two oxo groups directly attached to the pyrimidine ring, e.g. uridine, uridylic acid, thymidine, zidovudine
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/70Carbohydrates; Sugars; Derivatives thereof
    • A61K31/7135Compounds containing heavy metals
    • A61K31/714Cobalamins, e.g. cyanocobalamin, i.e. vitamin B12
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K33/00Medicinal preparations containing inorganic active ingredients
    • A61K33/04Sulfur, selenium or tellurium; Compounds thereof
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K45/00Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
    • A61K45/06Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00Drugs for disorders of the nervous system
    • A61P25/28Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23VINDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2002/00Food compositions, function of food ingredients or processes for food or foodstuffs

Definitions

  • the invention relates to the use of a composition for improving memory function, in a subject with a mini-mental state examination of 24-26.
  • Memory impairment is a serious shortcoming in many humans, particularly those suffering from Alzheimer's disease and/or elderly. Such impairments often have serious consequences, such as reduced quality of life, difficulties in performing the activities of daily living, potentially resulting in hospitalization or institutionalization.
  • Nutritional therapy is particularly desired in subjects who have relatively mild symptoms of memory impairment, i.e. subjects with a mini-mental state examination score (MMSE) of 24 to 26.
  • MMSE mini-mental state examination score
  • the present inventors have recognized that in this particular subgroup memory improvement has enormous effect for the subject activities of daily living and quality of life.
  • This subgroup of subjects is distinct in that the pathological pathways have just started to develop.
  • any score of 27 or higher is effectively normal.
  • 20-26 indicates mild dementia, 10-19 moderate dementia, and below 10 severe dementia. It was the present inventors' belief that within the group of 20-26, the memory impairment in the sub-group of 24-26 may even be reversible, as the pathological pathways have just started to develop.
  • the subgroup of subjects with a MMSE score of 24 to 26 comprises two populations. Firstly, it comprises those subjects who do not receive medication for memory impairment, i.e. the drug na ⁇ ve subjects.
  • the treatment of this subgroup is particularly preferred as in these subjects the balance between side effects and benefits of pharmaceutical intervention is still negative. Providing nutritional therapy to these subjects is desired because of the relative lack of negative side effects.
  • the subgroup of subjects with a MMSE score of 24 to 26 comprises a population of subjects with a very mild form of Alzheimer's Disease. Memory improvement through nutritional therapy is particularly desired in subjects with a very mild form of Alzheimer's Disease. If improvement of memory function could be achieved pharmaceutical intervention could be reduced or even postponed if significant improvements are observed.
  • the present inventors surprisingly found, through clinical study, that administration of a composition containing (a) uridine or uridine phosphate; and (b) docosahexaenoic acid and/or eicosapentaenoic acid showed a significant improvement of memory function in subjects with a MMSE of 24 to 26. Compliance and tolerability were very high and side effects were relatively low. It was particularly surprising that the present clinical data showed an actual improvement in memory function, more than just a reduction in the rate of decline in memory function. Additionally it was found that in this subgroup the delayed recall function was significantly improved. The results of the clinical study are summarized in the examples.
  • composition comprising:
  • the present invention relates to subjects with a mini-mental state examination of 24, 25 or 26, i.e. of 24-26.
  • the mini-mental state examination is a brief 30-point questionnaire test that is used to assess cognition. In the time span of about 10 minutes it samples various functions including memory and orientation.
  • the MMSE test includes simple questions and problems in a number of areas: the time and place of the test, repeating lists of words, language use and comprehension, and basic motor skills. Any score of 27 or higher (out of 30) is effectively normal; 20-26 indicates mild dementia; 10-19 moderate dementia, and below 10 severe dementia.
  • the MMSE is a standardized test.
  • the subjects as treated in the present invention have a mini-mental state examination score of 24-26 and are preferably drug na ⁇ ve and/or suffer from a very mild form of Alzheimer's disease, preferably drug na ⁇ ve subjects with a very mild Alzheimer's disease and a MMSE of 24-26.
  • drug na ⁇ ve refers to subjects who do not ingest one or more of cholinesterase inhibitors, N-methyl-D-aspartate (NMDA) antagonists and ginkgo biloba. In the clinical study presented here, it was found that the present composition is effective in drug na ⁇ ve subjects.
  • the subject is preferably a human, preferably an elderly human, preferably at least 50 years of age.
  • the present invention relates to use of the present composition for (i) the improvement of memory and/or (ii) treatment and/or prevention of impaired memory function.
  • the present invention provides a method for (i) the improvement of memory and/or (ii) treatment and/or prevention of impaired memory function in a subject in need thereof, said method comprising the administration of the present composition to said subject.
  • the present invention relates to the treatment of an impaired memory function. It was found that the memory function actually improved when the present composition was administered to the subject.
  • the memory function of a human subject can suitably be determined using the (modified) ADAS-cog, Wechsler Memory Scale, WMS revised.
  • Delayed recall function can be measured by a prose recall task 30-minute delay interval. Delayed recall of a prose passage is not a measure to differentiate clearly between very mild dementia of the Alzheimer type and normal ageing.
  • the present composition can also advantageously help subjects not (yet) suffering from Alzheimer's disease in improving the delayed recall function.
  • the invention provides a method for improving delayed recall and/or the treatment and/or prevention of an impaired delayed recall function.
  • the present composition comprises uridine and/or uridine phosphate.
  • the present composition comprises one or more uridine phosphates selected from uridine monophosphate (UMP), uridine diphosphate (UDP) and uridine triphosphate (UTP).
  • UMP uridine monophosphate
  • UDP uridine diphosphate
  • UDP uridine triphosphate
  • the present composition comprises UMP.
  • at least 50 wt. % of the uridine in the present composition is provided by UMP, more preferably at least 75 wt. %, most preferably at least 95 wt. %.
  • the present method preferably comprises the administration of uridine (the cumulative amount of uridine, deoxyuridine, uridine phosphates, uracil and acylated uridine derivatives) in an amount of 0.08-3 g per day, preferably 0.1-2 g per day, more preferably 0.2-1 g per day.
  • the present method preferably comprises the administration of a composition comprising uridine in an amount of 0.08-3 g UMP per 100 ml liquid product, preferably 0.1-2 g UMP per 100 ml liquid product, more preferably 0.2-1 g per 100 ml liquid product.
  • a composition comprising uridine in an amount of 0.08-3 g UMP per 100 ml liquid product, preferably 0.1-2 g UMP per 100 ml liquid product, more preferably 0.2-1 g per 100 ml liquid product.
  • 1-37.5 mg UMP per kilogram body weight is administered per day.
  • the required dosages of the equivalents on a weight base can be calculated from the dose for UMP by taking equimolar amounts using the molecular weight of the equivalent and of UMP, the latter being 324 Dalton.
  • the present composition preferably comprises at least docosahexaenoic acid (22:6 ⁇ -3; DHA) and/or eicosapentaenoic acid (20:5 ⁇ -3; EPA), preferably DHA and EPA.
  • DHA and/or EPA is preferably provided as triglycerides, diglycerides, monoglycerides, free fatty acids or their salts or esters, phospholipids, lysophospholipids, glycerol ethers, lipoproteins, ceramides, glycolipids or combinations thereof.
  • the present composition comprises at least DHA in triglyceride form.
  • the present method preferably comprises the administration of 400-5000 mg (DHA+EPA) per day, more preferably 500-3000 mg per day, most preferably 1000-2500 mg per day.
  • the proportion of (DHA+EPA) of the total fatty acids present in the composition is preferably 5-50 wt. %, more preferably 10-45 wt. %, most preferably 15-40 wt. %.
  • the present method preferably comprises the administration of DHA, preferably in an amount of 300-4000 mg per day, more preferably 500-2500 mg per day.
  • the present composition preferably contains a very low amount of arachidonic acid (AA).
  • the weight ratio DHA/AA in the present composition is at least 5, preferably at least 10, more preferably at least 15, preferably up to e.g. 60 or up to 30.
  • the present method preferably comprises the administration of a composition comprising less than 5 wt. % arachidonic acid based on total fatty acids, more preferably below 2.5 wt. %, e.g. down to 0.5 wt %.
  • the ratio omega-6/omega-3 fatty acids in the present product is preferably below 0.5, more preferably below 0.2, e.g. down to 0.05 or to 0.1.
  • the ratio ⁇ -6/ ⁇ -3 fatty acids (C 20 and higher) in the present product is preferably below 0.3, more preferably below 0.15, e.g. down to 0.03 or to 0.06.
  • an amount per day as described herein means an amount in a daily dosage unit provided by the composition of the invention. Such a daily dosage unit may be a single dosage, but it may also be divided over two or three, or even more daily servings. If the composition, as according to a preferred embodiment, is intended for administration as a single unit, the amounts per day as described herein, are preferably the amounts present in the (preferably packaged) composition unit. Treatment preferably involves administration once, twice or three times per day, more preferably once per day for a period of at least 3 weeks.
  • the present composition preferably comprises 1-40 wt. % DHA based on total fatty acids, preferably 3-36 wt. % DHA based on total fatty acids, more preferably 10-30 wt. % DHA based on total fatty acids.
  • the present composition preferably comprises 0.5-20 wt. % EPA based on total fatty acids, preferably 2-10 wt. % EPA based on total fatty acids, more preferably 5-10wt. % EPA based on total fatty acids.
  • the above-mentioned amounts take into account and optimise several aspects, including taste (e.g. too high LCP levels reduce taste, resulting in a reduced compliance).
  • the present composition preferably contains at least one oil selected from fish oil, algae oil and eggs lipids.
  • the present composition contains fish oil comprising DHA and EPA.
  • the present composition preferably comprises saturated and/or mono-unsaturated fatty acids.
  • the amount of saturated fatty acids is preferably 6-60 wt. % based on total fatty acids, preferably 12-40 wt. %, more preferably 20-40 wt. % based on total fatty acids.
  • the amount of C14:0 (myristic acid)+C16:0 (palmitic acid) is preferably 5-50 wt. %, preferably 8-36, more preferably 15-30 wt. % wt. % based on total fatty acids.
  • the total amount of monounsaturated fatty acids, such as oleic acid and palmitoleic acid is preferably between 5 and 40 wt. %, more preferably between 15 and 30 wt. %. A composition with these preferred amounts was found to be very effective.
  • the present composition preferably comprises phospholipids, preferably 0.1-50 wt. % phospholipids based on total weight of lipids, more preferably 0.5-20 wt. %, more preferably between 1 and 10% wt. %, most preferably between 1 and 5 wt. % based on total weight of lipids.
  • the total amount of lipids is preferably between 10 and 30 wt. % on dry matter, and/or between 2 and 10 g lipid per 100 ml for a liquid composition.
  • the composition preferably comprises between 0.01 and 1 gram lecithin per 100 ml, more preferably between 0.05 and 0.5 gram lecithin per 100 ml. A composition with these preferred amounts was found to be very effective.
  • the present composition contains choline and/or phosphatidylcholine.
  • the present method preferably comprises the administration of more than 50 mg choline per day, preferably 80-2000 mg choline per day, more preferably 120-1000 mg choline per day, most preferably 150-600 mg choline per day.
  • the present composition preferably comprises 50 mg to 3 gram choline per 100 ml of the liquid formula, preferably 200 mg-1000 mg choline/100 ml.
  • the composition may advantageously contain vitamins, preferably vitamin C, vitamin E and B vitamins, more preferably vitamin C, vitamin E, vitamin B6, vitamin B12 and folic acid.
  • vitamin B12 and folate are included.
  • the present composition preferably comprises 50-1000 ⁇ g folic acid, more preferably 150-750 ⁇ g, most preferably 200-500 ⁇ g folic acid, per 100 ml liquid product.
  • the present method preferably comprises the administration of 50-1000 ⁇ g folic acid per day, more preferably 150-750 ⁇ g, most preferably 200-500 ⁇ g folic acid per day.
  • the present composition preferably comprises 0.5-15 ⁇ g vitamin B12, more preferably 1-10 ⁇ g, most preferably 1.5-5 ⁇ g vitamin B12, per 100 ml liquid product.
  • the present method preferably comprises the administration 0.5-15 ⁇ g vitamin B12 per day, more preferably 1-10 ⁇ g, most preferably 1.5-5 ⁇ g vitamin B12 per day.
  • the present composition comprises one or more of phospholipids, choline, vitamin E, vitamin C, selenium, vitamin B12, vitamin B6 and folic acid, more preferably phospholipids, choline, vitamin E, vitamin C, selenium, vitamin B12, vitamin B6 and folic acid.
  • the present composition is preferably a ready-to-use liquid, solid, or semi-liquid product.
  • the present composition is preferably enterally administered, more preferably orally. Most preferably the present composition is administered through a straw.
  • the daily liquid amount is preferably between 75 and 200 ml per day or per unit, most preferably between 90 and 150 ml/day.
  • the present composition is preferably provided in the form of a drink capable of being ingested through a straw.
  • the composition according to the invention preferably has a low viscosity, preferably a viscosity between 1 and 2000 mPa.s measured at a shear rate of 100 sec ⁇ 1 at 20° C., more preferably a viscosity between 1 and 100 mPa.s measured at a shear rate of 100 sec ⁇ 1 at 20° C. More preferably, the present composition is provided in the form of a drink capable of being ingested through a straw which makes the product even easier to ingest and improves compliance.
  • the present composition has a viscosity of 1-80 mPas at a shear rate of 100 per sec at 20° C., more preferably of 1-40 mPas at a shear rate of 100 per sec at 20° C.
  • These viscosity measurements may for instance be performed using plate and cone geometry.
  • the present composition preferably has an osmolality of 300 to 800 mOsm/kg.
  • the energy density of the product is preferably not so high that it interferes with normal eating habits.
  • the present product preferably contains between 0.2 and 3 kcal/ml, more preferably between 0.5 and 2, between 0.7 and 1.5 kcal/ml.
  • the present composition contains digestible carbohydrates.
  • the present composition preferably contains between 1 and 50 gram digestible carbohydrates per 100 ml of a liquid product, more preferably between 5 and 30 grams per 100 ml, more preferably 10-30 grams carbohydrates per 100 ml.
  • the total amount of digestible carbohydrates is preferably between 25 and 80 wt. % on dry matter, preferably 40-80 wt. % based on dry matter.
  • the present composition may further comprise protein, preferably 0.5-10 g protein per 100 ml, more preferably 1-6 gram protein per 100 ml, most preferably 2-6 gram protein/100 ml.
  • protein preferably 0.5-10 g protein per 100 ml, more preferably 1-6 gram protein per 100 ml, most preferably 2-6 gram protein/100 ml.
  • the present composition contain at least 80 wt. % milk derived protein (e.g. whey and/or casein) based on total protein. Proteins enable the manufacturing of palatable products, especially for frail elderly.
  • Fat includes 1.5 g DHA+EPA, and 106 mg phospholipids (soy lecithin); Choline 400 mg; UMP (uridine monophosphate) 625 mg; Vitamin E 40 mg ⁇ -TE; Vitamin C 80 mg; Selenium 60 ⁇ g; Vitamin B12 3 ⁇ g; Vitamin B6 1 mg; Folic acid 400 ⁇ g.
  • AD Alzheimer's disease
  • Drug na ⁇ ve very mild AD subjects with a MMSE of 24-26 were randomly allocated in a double-blind 12 weeks study to receive a 125 ml (125 kcal) once-a-day milk-based drink with: (a) the formula according to example 1 (active product) or (b) an iso-caloric control drink according to example 1, but without EPA, DHA, phospholipids, choline, UMP, vitamin E, vitamin C, selenium, vitamin B12, vitamin B6 and folic acid (control product).
  • Outcome measure was a (delayed) verbal memory task (derived from Wechsler Memory Scale-revised).

Abstract

The invention thus pertains to the use of a composition comprising: (a) uridine or uridine phosphate; and (b) docosahexaenoic acid and/or eicosapentaenoic acid, for improving memory and/or the treatment or prevention of impaired memory function, in a subject with a mini-mental state examination of 24-26, wherein said composition is enterally administered to the subject. In the MMSE test, any score of 27 or higher (out of 30) is effectively normal. In the patients with dementia, 20-26 indicates mild dementia, 10-19 moderate dementia, and below 10 severe dementia. It was the present inventors' belief that within the group of 20-26, the memory impairment in the sub-group of 24-26 may even be reversible, as the pathological pathways have just started to develop. In this group of subjects the pathological pathways have just started to develop. Clinical studies show excellent results for this subgroup.

Description

    FIELD OF THE INVENTION
  • The invention relates to the use of a composition for improving memory function, in a subject with a mini-mental state examination of 24-26.
  • BACKGROUND OF THE INVENTION
  • Memory impairment is a serious shortcoming in many humans, particularly those suffering from Alzheimer's disease and/or elderly. Such impairments often have serious consequences, such as reduced quality of life, difficulties in performing the activities of daily living, potentially resulting in hospitalization or institutionalization.
  • Several treatments have been suggested for the improvement of memory function in subjects. However, very few have been proven effective. Moreover, the administration of several nutritional ingredients has also been suggested.
  • SUMMARY OF THE INVENTION
  • Nutritional therapy is particularly desired in subjects who have relatively mild symptoms of memory impairment, i.e. subjects with a mini-mental state examination score (MMSE) of 24 to 26. The present inventors have recognized that in this particular subgroup memory improvement has enormous effect for the subject activities of daily living and quality of life. This subgroup of subjects is distinct in that the pathological pathways have just started to develop. In the MMSE test, any score of 27 or higher (out of 30) is effectively normal. In the patients with dementia, 20-26 indicates mild dementia, 10-19 moderate dementia, and below 10 severe dementia. It was the present inventors' belief that within the group of 20-26, the memory impairment in the sub-group of 24-26 may even be reversible, as the pathological pathways have just started to develop. It would be highly desired to improve the memory function of this subgroup of subjects, as this may delay the need or reduce the dosage of treatment with pharmaceutical drugs. Moreover, improvements in subjects with a MMSE of 24 to 26 can postpone the need for a subject to be hospitalized or institutionalized, enable a longer independent living, improve the quality of life or improve the ability to perform daily activities.
  • The subgroup of subjects with a MMSE score of 24 to 26 comprises two populations. Firstly, it comprises those subjects who do not receive medication for memory impairment, i.e. the drug naïve subjects. The treatment of this subgroup is particularly preferred as in these subjects the balance between side effects and benefits of pharmaceutical intervention is still negative. Providing nutritional therapy to these subjects is desired because of the relative lack of negative side effects. For subjects with a MMSE of 24 to 26 who are drug naïve, it is particularly important to develop a therapy which delays the point in time where pharmaceutical drugs have to be administered.
  • Secondly, the subgroup of subjects with a MMSE score of 24 to 26 comprises a population of subjects with a very mild form of Alzheimer's Disease. Memory improvement through nutritional therapy is particularly desired in subjects with a very mild form of Alzheimer's Disease. If improvement of memory function could be achieved pharmaceutical intervention could be reduced or even postponed if significant improvements are observed.
  • It is however particularly difficult to find a (nutritional) composition which effectively improves memory function in the group with a MMSE of 24 to 26 as the pathological pathways have only started to develop and symptoms are very mild. Detecting differences between control and treatment group is particularly difficult, and hence effective treatment requires intensive testing.
  • The present inventors surprisingly found, through clinical study, that administration of a composition containing (a) uridine or uridine phosphate; and (b) docosahexaenoic acid and/or eicosapentaenoic acid showed a significant improvement of memory function in subjects with a MMSE of 24 to 26. Compliance and tolerability were very high and side effects were relatively low. It was particularly surprising that the present clinical data showed an actual improvement in memory function, more than just a reduction in the rate of decline in memory function. Additionally it was found that in this subgroup the delayed recall function was significantly improved. The results of the clinical study are summarized in the examples.
  • DETAILED DESCRIPTION OF THE INVENTION
  • The invention thus pertains to the use of a composition comprising:
      • a. uridine or uridine phosphate; and
      • b. docosahexaenoic acid and/or eicosapentaenoic acid
        for improving memory and/or the treatment or prevention of impaired memory function, in a subject with a mini-mental state examination of 24-26, wherein said composition is enterally administered to the subject.
    Subjects
  • The present invention relates to subjects with a mini-mental state examination of 24, 25 or 26, i.e. of 24-26. The mini-mental state examination (MMSE) is a brief 30-point questionnaire test that is used to assess cognition. In the time span of about 10 minutes it samples various functions including memory and orientation. The MMSE test includes simple questions and problems in a number of areas: the time and place of the test, repeating lists of words, language use and comprehension, and basic motor skills. Any score of 27 or higher (out of 30) is effectively normal; 20-26 indicates mild dementia; 10-19 moderate dementia, and below 10 severe dementia. The MMSE is a standardized test. Copyrights prevent the inventors from including a copy of the questionnaire into the specification, but it is readily accessible on the internet and available through copyright owner Psychological Assessment Resources (PAR). It is first introduced by Folstein et al. (Psych Res 12:189, 1975), and is widely used with small modifications to assess cognition.
  • The subjects as treated in the present invention have a mini-mental state examination score of 24-26 and are preferably drug naïve and/or suffer from a very mild form of Alzheimer's disease, preferably drug naïve subjects with a very mild Alzheimer's disease and a MMSE of 24-26. The term “drug naïve” as used in the present invention refers to subjects who do not ingest one or more of cholinesterase inhibitors, N-methyl-D-aspartate (NMDA) antagonists and ginkgo biloba. In the clinical study presented here, it was found that the present composition is effective in drug naïve subjects. The subject is preferably a human, preferably an elderly human, preferably at least 50 years of age.
  • Memory
  • The present invention relates to use of the present composition for (i) the improvement of memory and/or (ii) treatment and/or prevention of impaired memory function. Alternatively, the present invention provides a method for (i) the improvement of memory and/or (ii) treatment and/or prevention of impaired memory function in a subject in need thereof, said method comprising the administration of the present composition to said subject. Particularly, the present invention relates to the treatment of an impaired memory function. It was found that the memory function actually improved when the present composition was administered to the subject. The memory function of a human subject can suitably be determined using the (modified) ADAS-cog, Wechsler Memory Scale, WMS revised.
  • It was particularly found that in these subjects the delayed recall function was improved. Delayed recall function can be measured by a prose recall task 30-minute delay interval. Delayed recall of a prose passage is not a measure to differentiate clearly between very mild dementia of the Alzheimer type and normal ageing. Hence, the present composition can also advantageously help subjects not (yet) suffering from Alzheimer's disease in improving the delayed recall function. Hence, in a preferred embodiment the invention provides a method for improving delayed recall and/or the treatment and/or prevention of an impaired delayed recall function.
  • Uridine
  • Preferably the present composition comprises uridine and/or uridine phosphate. Preferably the present composition comprises one or more uridine phosphates selected from uridine monophosphate (UMP), uridine diphosphate (UDP) and uridine triphosphate (UTP).
  • Most preferably the present composition comprises UMP. Preferably at least 50 wt. % of the uridine in the present composition is provided by UMP, more preferably at least 75 wt. %, most preferably at least 95 wt. %. The present method preferably comprises the administration of uridine (the cumulative amount of uridine, deoxyuridine, uridine phosphates, uracil and acylated uridine derivatives) in an amount of 0.08-3 g per day, preferably 0.1-2 g per day, more preferably 0.2-1 g per day. The present method preferably comprises the administration of a composition comprising uridine in an amount of 0.08-3 g UMP per 100 ml liquid product, preferably 0.1-2 g UMP per 100 ml liquid product, more preferably 0.2-1 g per 100 ml liquid product. Preferably 1-37.5 mg UMP per kilogram body weight is administered per day. The required dosages of the equivalents on a weight base can be calculated from the dose for UMP by taking equimolar amounts using the molecular weight of the equivalent and of UMP, the latter being 324 Dalton.
  • Docosahexaenoic Acid and/or Eicosapentaenoic Acid
  • The present composition preferably comprises at least docosahexaenoic acid (22:6 ω-3; DHA) and/or eicosapentaenoic acid (20:5 ω-3; EPA), preferably DHA and EPA. The DHA and/or EPA is preferably provided as triglycerides, diglycerides, monoglycerides, free fatty acids or their salts or esters, phospholipids, lysophospholipids, glycerol ethers, lipoproteins, ceramides, glycolipids or combinations thereof. Preferably, the present composition comprises at least DHA in triglyceride form.
  • The present method preferably comprises the administration of 400-5000 mg (DHA+EPA) per day, more preferably 500-3000 mg per day, most preferably 1000-2500 mg per day. The proportion of (DHA+EPA) of the total fatty acids present in the composition is preferably 5-50 wt. %, more preferably 10-45 wt. %, most preferably 15-40 wt. %. The present method preferably comprises the administration of DHA, preferably in an amount of 300-4000 mg per day, more preferably 500-2500 mg per day.
  • The present composition preferably contains a very low amount of arachidonic acid (AA). Preferably the weight ratio DHA/AA in the present composition is at least 5, preferably at least 10, more preferably at least 15, preferably up to e.g. 60 or up to 30. The present method preferably comprises the administration of a composition comprising less than 5 wt. % arachidonic acid based on total fatty acids, more preferably below 2.5 wt. %, e.g. down to 0.5 wt %. The ratio omega-6/omega-3 fatty acids in the present product is preferably below 0.5, more preferably below 0.2, e.g. down to 0.05 or to 0.1. The ratio ω-6/ω-3 fatty acids (C 20 and higher) in the present product is preferably below 0.3, more preferably below 0.15, e.g. down to 0.03 or to 0.06.
  • An amount per day as described herein means an amount in a daily dosage unit provided by the composition of the invention. Such a daily dosage unit may be a single dosage, but it may also be divided over two or three, or even more daily servings. If the composition, as according to a preferred embodiment, is intended for administration as a single unit, the amounts per day as described herein, are preferably the amounts present in the (preferably packaged) composition unit. Treatment preferably involves administration once, twice or three times per day, more preferably once per day for a period of at least 3 weeks.
  • The present composition preferably comprises 1-40 wt. % DHA based on total fatty acids, preferably 3-36 wt. % DHA based on total fatty acids, more preferably 10-30 wt. % DHA based on total fatty acids. The present composition preferably comprises 0.5-20 wt. % EPA based on total fatty acids, preferably 2-10 wt. % EPA based on total fatty acids, more preferably 5-10wt. % EPA based on total fatty acids. The above-mentioned amounts take into account and optimise several aspects, including taste (e.g. too high LCP levels reduce taste, resulting in a reduced compliance).
  • The present composition preferably contains at least one oil selected from fish oil, algae oil and eggs lipids. Preferably the present composition contains fish oil comprising DHA and EPA.
  • Saturated and Monounsaturated Fatty Acids
  • The present composition preferably comprises saturated and/or mono-unsaturated fatty acids. The amount of saturated fatty acids is preferably 6-60 wt. % based on total fatty acids, preferably 12-40 wt. %, more preferably 20-40 wt. % based on total fatty acids. In particular the amount of C14:0 (myristic acid)+C16:0 (palmitic acid) is preferably 5-50 wt. %, preferably 8-36, more preferably 15-30 wt. % wt. % based on total fatty acids. The total amount of monounsaturated fatty acids, such as oleic acid and palmitoleic acid, is preferably between 5 and 40 wt. %, more preferably between 15 and 30 wt. %. A composition with these preferred amounts was found to be very effective.
  • Phospholipids
  • Preferably, the present composition preferably comprises phospholipids, preferably 0.1-50 wt. % phospholipids based on total weight of lipids, more preferably 0.5-20 wt. %, more preferably between 1 and 10% wt. %, most preferably between 1 and 5 wt. % based on total weight of lipids. The total amount of lipids is preferably between 10 and 30 wt. % on dry matter, and/or between 2 and 10 g lipid per 100 ml for a liquid composition. The composition preferably comprises between 0.01 and 1 gram lecithin per 100 ml, more preferably between 0.05 and 0.5 gram lecithin per 100 ml. A composition with these preferred amounts was found to be very effective.
  • Choline
  • Preferably the present composition contains choline and/or phosphatidylcholine. The present method preferably comprises the administration of more than 50 mg choline per day, preferably 80-2000 mg choline per day, more preferably 120-1000 mg choline per day, most preferably 150-600 mg choline per day. The present composition preferably comprises 50 mg to 3 gram choline per 100 ml of the liquid formula, preferably 200 mg-1000 mg choline/100 ml.
  • Vitamins
  • The composition may advantageously contain vitamins, preferably vitamin C, vitamin E and B vitamins, more preferably vitamin C, vitamin E, vitamin B6, vitamin B12 and folic acid. Advantageously, vitamin B12 and folate are included. The present composition preferably comprises 50-1000 μg folic acid, more preferably 150-750 μg, most preferably 200-500 μg folic acid, per 100 ml liquid product. The present method preferably comprises the administration of 50-1000 μg folic acid per day, more preferably 150-750 μg, most preferably 200-500 μg folic acid per day. The present composition preferably comprises 0.5-15 μg vitamin B12, more preferably 1-10 μg, most preferably 1.5-5 μg vitamin B12, per 100 ml liquid product. The present method preferably comprises the administration 0.5-15 μg vitamin B12 per day, more preferably 1-10 μg, most preferably 1.5-5 μg vitamin B12 per day.
  • Preferably the present composition comprises one or more of phospholipids, choline, vitamin E, vitamin C, selenium, vitamin B12, vitamin B6 and folic acid, more preferably phospholipids, choline, vitamin E, vitamin C, selenium, vitamin B12, vitamin B6 and folic acid.
  • Product
  • The present composition is preferably a ready-to-use liquid, solid, or semi-liquid product. The present composition is preferably enterally administered, more preferably orally. Most preferably the present composition is administered through a straw. When it is a ready-to-use liquid, the daily liquid amount is preferably between 75 and 200 ml per day or per unit, most preferably between 90 and 150 ml/day.
  • The subjects that can benefit from the method and composition of the invention often experience problems with eating. Their sensory capabilities and/or control of muscles can become imparted, as well as in some instances their ambition to apply proper eating habits. Swallowing and/or mastication may be problematic. Hence, the present composition is preferably provided in the form of a drink capable of being ingested through a straw.
  • The composition according to the invention preferably has a low viscosity, preferably a viscosity between 1 and 2000 mPa.s measured at a shear rate of 100 sec−1 at 20° C., more preferably a viscosity between 1 and 100 mPa.s measured at a shear rate of 100 sec−1 at 20° C. More preferably, the present composition is provided in the form of a drink capable of being ingested through a straw which makes the product even easier to ingest and improves compliance. In a preferred embodiment the present composition has a viscosity of 1-80 mPas at a shear rate of 100 per sec at 20° C., more preferably of 1-40 mPas at a shear rate of 100 per sec at 20° C. These viscosity measurements may for instance be performed using plate and cone geometry.
  • To be optimally accepted by the subject, the present composition preferably has an osmolality of 300 to 800 mOsm/kg. However, the energy density of the product is preferably not so high that it interferes with normal eating habits. When in liquid form, the present product preferably contains between 0.2 and 3 kcal/ml, more preferably between 0.5 and 2, between 0.7 and 1.5 kcal/ml.
  • Advantageously the present composition contains digestible carbohydrates. The present composition preferably contains between 1 and 50 gram digestible carbohydrates per 100 ml of a liquid product, more preferably between 5 and 30 grams per 100 ml, more preferably 10-30 grams carbohydrates per 100 ml. The total amount of digestible carbohydrates is preferably between 25 and 80 wt. % on dry matter, preferably 40-80 wt. % based on dry matter.
  • The present composition may further comprise protein, preferably 0.5-10 g protein per 100 ml, more preferably 1-6 gram protein per 100 ml, most preferably 2-6 gram protein/100 ml. Preferably the present composition contain at least 80 wt. % milk derived protein (e.g. whey and/or casein) based on total protein. Proteins enable the manufacturing of palatable products, especially for frail elderly.
  • EXAMPLES Example 1
  • Packaged composition for the comprising per 125 ml:
  • Energy 125 kcal; Protein 3.9 g; Carbohydrate 16.5 g; Fat 4.9 g.
  • Fat includes 1.5 g DHA+EPA, and 106 mg phospholipids (soy lecithin); Choline 400 mg; UMP (uridine monophosphate) 625 mg; Vitamin E 40 mg α-TE; Vitamin C 80 mg; Selenium 60 μg; Vitamin B12 3 μg; Vitamin B6 1 mg; Folic acid 400 μg.
  • Minerals and trace elements: Sodium 125 mg; Potassium 187.5 mg; Chloride 156.3 mg; Calcium 100 mg; Phosphorus 87.5 mg; Magnesium 25 mg; Iron 2 mg; Zinc 1.5 mg; Copper 225 μg; Manganese 0.41 mg; Molybdenum 12.5 μg; Chromium 8.4 μg; Iodine 16.3 μg. Vitamins: Vit. A 200 μg-RE; vit. D3 0.9 μg; vit. K 6.6 μg; Thiamin (B1) 0.19 mg; Riboflavin (B2) 0.2 mg; Niacin (B3) 2.25 mg-NE; Pantothenic acid (B5) 0.66 mg; Biotin 5 μg.
  • Example 2 Clinical study
  • Increasing evidence shows a role of nutrients in subjects with impaired memory function. The present study was done to assess the effect of an intervention with a medical food on memory in drug naïve, very mild Alzheimer's disease (AD) subjects. Drug naïve very mild AD subjects with a MMSE of 24-26 were randomly allocated in a double-blind 12 weeks study to receive a 125 ml (125 kcal) once-a-day milk-based drink with: (a) the formula according to example 1 (active product) or (b) an iso-caloric control drink according to example 1, but without EPA, DHA, phospholipids, choline, UMP, vitamin E, vitamin C, selenium, vitamin B12, vitamin B6 and folic acid (control product).
  • Outcome measure was a (delayed) verbal memory task (derived from Wechsler Memory Scale-revised).
  • Results:
  • At baseline, there was no significant difference between the group treated with the active product and the group treated with the control product. However, there was a significant difference between the two groups in the change in the delayed verbal memory task (derived from Wechsler Memory scale-revised (WMS-r)) between baseline and after 12 weeks of treatment. The group receiving control product (n=66) had an average decline of −0.164 with a 95% confidence interval including zero (−0.938 to 0.610) whereas the group receiving active product (n=60) had an average improvement of 0.983 points on the delayed verbal memory scale derived from WMS-r with a 95% confidence interval above zero (0.214 to 1.752).
  • This study demonstrates that intervention with the active product for 12 weeks improves memory, particularly delayed recall function in subjects with MMSE of 24-26 (see table 1).
  • TABLE 1
    Delayed verbal memory score
    Group Subjects with MMSE 24-26 (WMS-r)
    Control 66 −0.164
    Treatment 60 +0.983

Claims (16)

1.-7. (canceled)
8. An enteral composition comprising:
a. uridine or uridine phosphate; and
b. docosahexaenoic acid and/or eicosapentaenoic acid.
9. The composition according to claim 8, further comprising phospholipids, choline, vitamin E, vitamin C, selenium, vitamin B12, vitamin B6 and folic acid.
10. The composition according to claim 8, comprising 0.1-2 g uridine, calculated as uridine monophosphate, per daily dosage unit.
11. The composition according to claim 8, comprising 400-5000 mg of the sum of DHA and EPA per daily dosage unit.
12. The composition according to claim 10, comprising 400-5000 mg of the sum of DHA and EPA per daily dosage unit.
13. The composition according to claim 8, comprising 1-50 gram digestible carbohydrates per 100 ml.
14. The composition according to claim 8, comprising 0.5-10 g protein per 100 ml.
15. The composition according to claim 8, comprising 0.2-3 kcal/ml.
16. The composition according to claim 8, comprising 1-50 gram digestible carbohydrates per 100 ml, 0.5-10 g protein per 100 ml, and 0.2-3 kcal/ml.
17. The composition according to claim 8, being a liquid product, having a viscosity between 1 and 100 mPa.s as measured at a shear rate of 100 s−1 at 20° C.
18. A method for (i) improving delayed recall function and/or (ii) the treatment and/or prevention of an impaired delayed recall function of a subject, comprising enterally administering to the subject a composition comprising:
a. uridine or uridine phosphate; and
b. docosahexaenoic acid and/or eicosapentaenoic acid.
19. The method according to claim 18, wherein the subject has a mini-mental state examination of 24-26.
20. The method according to claim 18, wherein the composition is enterally administered to the subject at least one time per day for a period of at least 3 weeks.
21. A method for improving memory and/or treatment or prevention of impaired memory function in a subject with a mini-mental state examination of 24 or 25, comprising enterally administering to the subject a composition comprising:
a. uridine or uridine phosphate; and
b. docosahexaenoic acid and/or eicosapentaenoic acid.
22. The method according to claim 21, wherein the composition is enterally administered to the subject at least one time per day for a period of at least 3 weeks.
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