WO2024089076A1 - Complexes glutamine - acide tannique et leur utilisation dans le traitement de taches pigmentaires - Google Patents
Complexes glutamine - acide tannique et leur utilisation dans le traitement de taches pigmentaires Download PDFInfo
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- WO2024089076A1 WO2024089076A1 PCT/EP2023/079728 EP2023079728W WO2024089076A1 WO 2024089076 A1 WO2024089076 A1 WO 2024089076A1 EP 2023079728 W EP2023079728 W EP 2023079728W WO 2024089076 A1 WO2024089076 A1 WO 2024089076A1
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- glutamine
- tannic acid
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
- A61K8/44—Aminocarboxylic acids or derivatives thereof, e.g. aminocarboxylic acids containing sulfur; Salts; Esters or N-acylated derivatives thereof
- A61K8/442—Aminocarboxylic acids or derivatives thereof, e.g. aminocarboxylic acids containing sulfur; Salts; Esters or N-acylated derivatives thereof substituted by amido group(s)
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/185—Acids; Anhydrides, halides or salts thereof, e.g. sulfur acids, imidic, hydrazonic or hydroximic acids
- A61K31/19—Carboxylic acids, e.g. valproic acid
- A61K31/195—Carboxylic acids, e.g. valproic acid having an amino group
- A61K31/197—Carboxylic acids, e.g. valproic acid having an amino group the amino and the carboxyl groups being attached to the same acyclic carbon chain, e.g. gamma-aminobutyric acid [GABA], beta-alanine, epsilon-aminocaproic acid or pantothenic acid
- A61K31/198—Alpha-amino acids, e.g. alanine or edetic acid [EDTA]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/70—Carbohydrates; Sugars; Derivatives thereof
- A61K31/7024—Esters of saccharides
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
- A61K8/0241—Containing particulates characterized by their shape and/or structure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/60—Sugars; Derivatives thereof
- A61K8/602—Glycosides, e.g. rutin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P17/00—Drugs for dermatological disorders
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q19/00—Preparations for care of the skin
- A61Q19/02—Preparations for care of the skin for chemically bleaching or whitening the skin
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
- C07H13/00—Compounds containing saccharide radicals esterified by carbonic acid or derivatives thereof, or by organic acids, e.g. phosphonic acids
- C07H13/02—Compounds containing saccharide radicals esterified by carbonic acid or derivatives thereof, or by organic acids, e.g. phosphonic acids by carboxylic acids
- C07H13/08—Compounds containing saccharide radicals esterified by carbonic acid or derivatives thereof, or by organic acids, e.g. phosphonic acids by carboxylic acids having the esterifying carboxyl radicals directly attached to carbocyclic rings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
- A61K2800/41—Particular ingredients further characterized by their size
- A61K2800/412—Microsized, i.e. having sizes between 0.1 and 100 microns
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
- A61K2800/58—Metal complex; Coordination compounds
Definitions
- This patent application concerns a glutamine - tannic acid complex, as well as a pharmaceutical or cosmetic composition comprising said complex.
- the present invention also relates to said complex as well as said composition for use in the prevention and/or treatment of dermatological lesions in a patient, as well as its use in a cosmetic method for the prevention and/or treatment of pigment spots in a subject. .
- Glutamine L-glutamine
- glutamine is the most abundant amino acid in free form in human plasma. Although classified as a non-essential amino acid, glutamine can become so under conditions of severe stress in which intracellular and plasma glutamine concentrations can decrease by more than 50% and 30%, respectively (Kovacevic Z., McGivan J. Mitochondrial metabolism of glutamine and glutamate and its physiological significance. Physiol Rev. 1983;
- Glutamine is also known to play an important role in the treatment of dermatological conditions, and notably participates in the synthesis of collagen. In this context, glutamine accelerates and promotes the restructuring of skin cells when they are damaged, thus ensuring its good health.
- glutamine is unstable in solution, which limits its use in topical formulations, whether for cosmetic or therapeutic purposes.
- the present invention relates to a glutamine - tannic acid complex, in which the molar ratio of tannic acid: glutamine is between 1: 1 and 1: 6.
- the glutamine - tannic acid complex according to the invention has a tannic acid: glutamine molar ratio of between 1:1 and 1:5.
- the present invention relates to a glutamine - tannic acid complex, in in which the molar ratio of tannic acid: glutamine is between 1:1 and 1:5.
- the glutamine - tannic acid complex according to the invention has a tannic acid: glutamine molar ratio of between 1: 3 and 1: 6.
- the present invention relates to a glutamine - tannic acid complex , in which the molar ratio of tannic acid: glutamine is between 1: 3 and 1: 6.
- the glutamine - tannic acid complex according to the invention has a tannic acid: glutamine molar ratio of 1: 5.
- the present invention relates to a glutamine - tannic acid complex, in which the molar ratio of tannic acid: glutamine is 1:5.
- the present invention relates to a composition
- a composition comprising a therapeutically or cosmetically active quantity of the glutamine - tannic acid complex according to any one of the preceding claims and at least one pharmaceutically or cosmetically acceptable excipient.
- the present invention also relates to a non-therapeutic use of the glutamine - tannic acid complex or of the composition comprising said complex, for the treatment or prevention of pigment spots.
- the present invention relates to the glutamine - tannic acid complex or to the composition comprising said complex for use as a medication, in particular in the treatment and/or prevention of dermatological lesions in a patient. detailed description of the invention
- composition comprising A and B
- the scope of the expression "a composition comprising A and B” should not be limited to the composition composed only of A and B. This means that, in the context of the present invention, the only relevant elements are A and B Consequently, the terms “comprising” and “including” encompass the more restrictive terms “consisting essentially of” and “consisting of”.
- glucose and “L-glutamine” are used interchangeably to refer to the alpha amino acid used in protein biosynthesis.
- tannin also known as tannin, gallotannin, gallotannic acid or digallic acid
- Tannic acid is in the form of a yellow to brownish amorphous powder, having an approximate composition corresponding to the formula C76H52O46 and a molecular weight of approximately 1701 grams/mole.
- tannic acid is typically extracted from gall nuts, it can be produced from the bark and fruits of many plants. Tannic acid is very soluble in water, glycerin and alcohol. Tannic acid can be obtained either by extraction from natural products or by chemical synthesis.
- the terms “patient” and “subject” include humans as well as other animals.
- the term "therapeutically active quantity” designates the quantity of a pharmaceutically active ingredient which will elicit the biological or medical response in a tissue or system, animal or human, as sought by a researcher, a doctor, veterinarian or other clinical stakeholder (for example, reduction of dermatological lesions).
- the term “cosmetically active quantity” designates the quantity of a cosmetically active ingredient which will elicit the cosmetic response in a tissue or system, animal or human, as sought by a researcher, doctor, veterinarian or other clinical or aesthetic practitioner (for example, reduction of pigment spots).
- composition refers to both crude compositions and individual dosage units comprising the active ingredient and at least one excipient, for example glutamine - tannic acid complex and at least one (for example two) excipient(s).
- excipient for example glutamine - tannic acid complex
- excipient(s) for example glutamine - tannic acid complex
- prevent or “prevention” refer to the administration of a compound or composition before the appearance of symptoms.
- the present invention relates to a glutamine - tannic acid complex, in which the molar ratio of tannic acid: glutamine is between 1: 1 and 1: 6.
- the glutamine - tannic acid complex according to the invention has a tannic acid: glutamine molar ratio of between 1:1 and 1:5.
- the present invention relates to a glutamine - tannic acid complex, in in which the tannic acid: glutamine molar ratio is between 1:1 and 1:5.
- the glutamine - tannic acid complex according to the invention has a tannic acid: glutamine molar ratio of between 1: 3 and 1: 6.
- the present invention relates to a glutamine - tannic acid complex , in which the molar ratio of tannic acid: glutamine is between 1: 3 and 1: 6.
- the glutamine - tannic acid complex according to the invention has a tannic acid: glutamine molar ratio of 1: 5.
- the present invention relates to a glutamine - tannic acid complex, in which the molar ratio of tannic acid: glutamine is 1:5.
- the glutamine - tannic acid complex is in solid form.
- the glutamine - tannic acid complex is a complex suitable for use in non-therapeutic cosmetic methods for the treatment and/or prevention of pigment spots in a subject. Furthermore, the glutamine - tannic acid complex, as described above, is also suitable for use as a medicine, in particular in the treatment and/or prevention of dermatological lesions in a patient.
- the inventors have surprisingly discovered that the glutamine - tannic acid complex, as described above, has great stability allowing an extended shelf life, in particular in aqueous solvents. This property makes it possible to formulate glutamine in cosmetic and pharmaceutical preparations for industrial use.
- the inventors are of the opinion that the glutamine - tannic acid complex according to the invention is composed on average of five glutamine molecules associated by Van der Waals type interactions (non-covalent) with the five hydrogens. tannic acid labiles.
- the molar ratio of tannic acid: glutamine in the complex according to the invention varies between 1: 1 and 1: 6, preferably between 1: 3 and 1: 6.
- the glutamine - tannic acid complex according to invention presents a tannic acid: glutamine molar ratio of between 1:1 and 1:6, preferably between 1:3 and 1:6, preferably between 1:4 and 1:6, even more preferably of approximately 1:5, even more preferably 1:5.
- the molar ratio of tannic acid: glutamine in the complex according to the invention is between 1:1 and 1:5.
- the molar ratio of tannic acid: glutamine in the complex according to the invention is 1: 5.
- the glutamine - tannic acid complex is in essentially dry form.
- the expression "essentially dry" in connection with a complex means that said complex does not comprise ingredients in liquid form in an amount greater than 10% by weight, preferably not in an amount greater than 7%, even more preferably not in an amount greater than 5% relative to the total weight of said complex.
- the complex developed by the inventors also has significant solubility in aqueous solvents, thus allowing the formulation of acceptable pharmaceutical or cosmetic compositions with high doses of glutamine.
- Such formulations are advantageous in that they make it possible to reduce the number of daily doses and thus ensure better compliance of the patient or the subject treated with the treatment.
- the complex according to the invention is advantageously soluble in distilled water at a temperature of 20 ° C in an amount of 100 g/L, preferably in an amount of 150 g/L, even more preferably in a quantity of 200 g/L.
- the present invention further relates to a composition
- a composition comprising a therapeutically or cosmetically active amount of the glutamine complex - tannic acid according to the invention and at least one pharmaceutically or cosmetically acceptable excipient.
- the excipients provide the composition according to the invention with optimal physical and (bio-)chemical properties.
- the present invention therefore relates to a composition comprising a therapeutically active quantity of the glutamine - tannic acid complex according to the invention and at least one pharmaceutically acceptable excipient. Furthermore, the present invention also relates to a composition comprising a cosmetically active quantity of the glutamine - tannic acid complex according to the invention and at least one cosmetically acceptable excipient.
- the composition according to the invention comprises from 0.5 to 10.0% by weight of the glutamine - tannic acid complex according to the invention, more advantageously from 1.5 to 8.0%, even more advantageously from 2.0 at 6.0% by weight of said complex relative to the total weight of said composition.
- composition according to the invention comprises several pharmaceutically or cosmetically acceptable excipients.
- the excipients allow the composition according to the invention to acquire certain beneficial properties in order to achieve the desired therapeutic or cosmetic effects.
- composition according to the invention further comprises a pharmaceutically or cosmetically acceptable quantity of an additional active ingredient.
- composition according to the invention comprises several additional active ingredients.
- the composition according to the present invention comprises a solubilizing agent.
- the solubilizing agent according to the invention makes it possible to increase the bioaccessibility of the active ingredients present in the composition.
- a solubilizing agent is advantageously a polar organic solvent miscible in water, preferably a glycol ether, even more preferably the humectant is diethylene glycol monoethyl ether (DEGEE).
- DEGEE diethylene glycol monoethyl ether
- a solubilizing agent such as the product known under the trade name Transcutol® CG.
- said composition comprises from 1.0 to 10.0% by weight of said solubilizing agent, more advantageously from 1.5 to 5.0%, even more advantageously from 2.0 to 4.0% by weight of said solubilizing agent. solubilization relative to the total weight of said composition.
- the composition according to the invention comprises a humectant.
- the humectant according to the invention is a hygroscopic compound allowing the composition according to the invention to have moisturizing properties.
- a humectant is advantageously an organic alcohol, preferably one glycol, even more preferably a butylene glycol.
- a solubilizing agent such as the product known under the trade name Greendiol®.
- said composition comprises from 1.0 to 20.0% by weight of said humectant, more preferably from 2.0 to 10.0%, even more advantageously from 3.0 to 7.0% by weight of said humectant. relating to the total weight of said composition.
- the composition according to the invention comprises a thickening agent.
- the thickening agent according to the invention makes it possible to increase the viscosity of the composition according to the invention so as to improve its attractiveness and its texture.
- a thickening agent is advantageously a polysaccharide, preferably a branched polysaccharide, even more preferably a xanthan gum.
- a thickening agent such as the product known under the trade name Xanthan gum FNCSP-PC® will be used.
- said composition comprises from 0.01 to 2.0% by weight of said thickening agent, more advantageously from 0.05 to 1.0%, even more advantageously from 0.1 to 0.7% by weight of said thickening agent. relating to the total weight of said composition.
- the composition according to the invention comprises an antifungal agent.
- the antifungal agent according to the invention makes it possible to avoid the development of fungal contamination in the composition.
- Such an antifungal agent is advantageously a salt of an organic acid, preferably a salt of benzoic acid, even more preferably the preservative is sodium benzoate.
- said composition comprises from 0.05 to 2.0% by weight of said antifungal agent, more advantageously from 0.1 to 1%, even more advantageously from 0.2 to 0.5% by weight of said antifungal agent relating to the total weight of said composition.
- the composition according to the invention comprises an antibacterial agent.
- the antibacterial agent according to the invention makes it possible to avoid the development of bacterial contamination in the composition.
- Such an antibacterial agent is advantageously a mixture of organic acids of plant origin and their salts, preferably a mixture comprising a salt of levulinic acid (CeHsCh), preferably sodium levulinate.
- an antibacterial agent such as the product known under the trade name Dermosoft® 700B.
- said composition comprises from 0.1 to 10.0% by weight of said antibacterial agent, more preferably from 0.2 to 5.0%, even more advantageously from 0.5 to 3.0% by weight of said antibacterial agent relative to the weight. total of said composition.
- the composition according to the invention comprises hyaluronic acid or one of its salts.
- Hyaluronic acid or one of its salts according to the invention has numerous benefits, in particular for the hydration and cohesion of tissues, the control of angiogenesis, inflammatory processes as well as healing.
- the hyaluronic acid or one of its salts according to the invention is sodium hyaluronate.
- the composition according to the invention comprises at least two types of sodium hyaluronate having different molecular weights.
- the composition according to the invention comprises sodium hyaluronate having an average molecular weight of approximately 50 kDa as well as sodium hyaluronate having an average molecular weight of approximately 300 kDa.
- said composition comprises from 0.01 to 2% by weight of said hyaluronic acid or one of its salts, more advantageously from 0.05 to 1%, even more advantageously from 0.1 to 0.5% by weight. of said hyaluronic acid or one of its salts relative to the total weight of said composition.
- composition according to the invention is intended for topical administration, preferably on the skin.
- composition according to the invention can be in solid form or in liquid form.
- said composition is in the form of a solution, a gel, a lotion, a cream, an ointment, a foam, an emulsion, a microemulsion, a milk, a serum, an aerosol, a spray, a dispersion or a soap.
- the composition according to the invention is in the form of a serum, preferably a serum based on water and polyols.
- the composition according to the invention therefore comprises water.
- the composition according to the invention comprises at least 50.0% by weight of water, preferably at least 60.0%, more preferably at least 70.0%, preferably at least 80.0% of water relative to the total weight of said composition.
- the composition according to the invention comprises, relative to the total weight of the composition: from 0.5 to 10.0% by weight of the glutamine - tannic acid complex according to the invention; from 1.0 to 10.0% by weight of a solubilizing agent; from 1.0 to 20.0% by weight of a humectant; from 0.01 to 2.0% by weight of a thickening agent; from 0.05 to 2.0% by weight of an antifungal agent; from 0.1 to 10.0% by weight of an antibacterial agent; from 0.01 to 2.0% by weight of hyaluronic acid or one of its salts; and at least 50.0% water.
- the composition according to the invention comprises, relative to the total weight of the composition: from 0.5 to 10.0% by weight of the glutamine - tannic acid complex according to the invention; from 1.0 to 10.0% by weight of diethylene glycol monoethyl ether (DEGEE); from 1.0 to 20.0% by weight of butylene glycol; 0.01 to 2.0% by weight of xanthan gum; from 0.05 to 2% by weight of sodium benzoate; from 0.1 to 10.0% by weight of a mixture of organic acids and their salts comprising sodium levulinate; from 0.01 to 2.0% by weight of sodium hyaluronate; and at least 50.0% water.
- DEGEE diethylene glycol monoethyl ether
- the composition according to the invention is a serum comprising, relative to the total weight of the composition: from 2.0 to 6.0% by weight of the glutamine - tannic acid complex according to the invention; from 2.0 to 4.0% by weight of diethylene glycol monoethyl ether (DEGEE); 3.0 to 7.0% by weight of butylene glycol; from 0.1 to 0.7% by weight of xanthan gum; from 0.2 to 0.5% by weight of sodium benzoate; from 0.5 to 3.0% by weight of a mixture of organic acids and their salts comprising sodium levulinate; from 0.1 to 0.5% by weight of sodium hyaluronate; and at least 80.0% water.
- DEGEE diethylene glycol monoethyl ether
- butylene glycol from 0.1 to 0.7% by weight of xanthan gum
- sodium benzoate from 0.5 to 3.0% by weight of a mixture of organic acids and their salts comprising sodium levulinate
- from 0.1 to 0.5% by weight of sodium hyaluronate and at
- the pH of the composition according to the invention is between 3.0 and 8.0, preferably between 4.0 and 7.0, even more preferably between 5.0 and 6.0, preferably the pH of the composition according to the invention is approximately 5.5.
- the present invention relates to the complex according to the invention and/or the composition according to the invention for use as a medicine.
- the complex according to the invention or the composition according to the invention is used in the treatment and/or prevention of dermatological lesions in a patient.
- the present invention therefore relates to the glutamine - tannic acid complex according to the invention for use in the treatment and/or prevention of dermatological lesions in a patient. Furthermore, the present invention also relates to the composition according to the invention for use in the treatment and/or prevention of dermatological lesions in a patient.
- Non-limiting examples of dermatological lesions include bruises, preferably post-operative bruises, vascular disorders of the skin, spider veins, varicosities, spots on the face, purpura on the skin. face, body or legs, telangiectasias, irritation following a chemical peel, Schamberg's disease, radiodermatitis, rosacea, progressive pigmentary dermatitis or a mixture of these.
- the complex according to the invention or the composition according to the invention is used in the treatment and/or prevention of dermatological lesions caused by treatment by sclerotherapy and/or by laser, for example by vascular laser.
- sclerotherapy treatment and (vascular) laser have been used in the treatment of spider veins and varicose veins for many years.
- many patients who have undergone this type of treatment experience bruising around the treated area.
- the inventors have surprisingly discovered that such lesions can be treated effectively by the complex or composition according to the invention.
- the present invention relates to the non-therapeutic, cosmetic use of the complex according to the invention or the composition according to the invention for the treatment or prevention of pigment spots.
- the inventors have in fact surprisingly discovered that the general appearance of a subject can be improved following the use of the complex or the composition according to the invention thanks to the treatment or prevention of pigment spots.
- the complex according to the invention or the composition according to the invention is used in the treatment or prevention of pigment spots on the face, body or legs, preferably in the treatment or prevention of dark circles.
- dark circles are difficult to treat, in particular because their etiology depends on genetic factors and phototypes.
- the present invention therefore relates to the non-therapeutic use of the glutamine - tannic acid complex according to the invention for the treatment and/or prevention of dark circles in a subject. Furthermore, the present invention also relates to a non-therapeutic cosmetic method for the treatment and/or prevention of dark circles comprising the administration of the composition according to the invention to a subject.
- the present invention further relates to a method for producing the glutamine - tannic acid complex according to the invention, comprising reacting tannic acid and glutamine in a solvent so as to obtain a solution and, optionally, recovering said complex from said solution by drying.
- the solvent is an aqueous solvent, preferably water.
- the tannic acid and the glutamine are dissolved in a molar ratio of tannic acid: glutamine of between 1:1 and 1:6, preferably in a molar ratio of tannic acid: glutamine included between 1: 3 and 1: 6, preferably in a tannic acid: glutamine molar ratio of between 1: 1 and 1: 5, more preferably in a tannic acid: glutamine molar ratio of approximately 1: 5, more preferably still, in a tannic acid: glutamine molar ratio of 1:5.
- the reaction step is carried out, at least partially, at a temperature of at least 35°C.
- said complex is recovered from said solution by drying, preferably by lyophilization, spray drying or vacuum drying, preferably by lyophilization.
- An aqueous solution of tannic acid was prepared by dissolving 222.22 g of tannic acid (10% H2O) in 1000 mL of MilliQ water. The pH of the solution is 3.08. The aqueous solution of tannic acid is heated to 50 °C and the L-glutamine (95.45 g) is added with stirring in successive portions of 10 g until complete dissolution. The aqueous solution obtained is homogeneous and has a brown color. Once this solution has returned to room temperature, the pH is measured at 4.08. 30 mL of an antibacterial agent (Dermasoft® Eco 1338) are added to the solution and the pH is measured at 4.47.
- an antibacterial agent Dermata 1338
- the solution thus obtained is then stirred at room temperature for 48 hours before being filtered to remove residual solid residues.
- the aqueous solution of the glutamine - tannic acid complex thus obtained has a volume of 1210 mL and a weight of 1382.7 g.
- the glutamine - tannic acid complex is isolated by freeze-drying this solution.
- An aqueous solution of tannic acid was prepared by dissolving 2888.96 g of tannic acid in 1300 L of demineralized water at 30 °C, in portions of 500 g. The pH of the solution is 3.00. L-glutamine (1240.85 g) is then added with stirring to the aqueous solution of tannic acid in portions of 500 g. After adding all of the L-glutamine, the solution is heated to 45°C. After 7 hours of incubation with stirring, 390 g of an antibacterial agent (Dermasoft® Eco 1338) are added. The solution thus obtained is then stirred at room temperature for 12 hours before being filtered to remove residual solid residues. The pH of the solution is measured at 4.16. The aqueous solution of the glutamine-tannic acid complex thus obtained has a density of 1.0969. The glutamine - tannic acid complex is isolated by freeze-drying this solution.
- the stability of the glutamine-tannic acid complex thus obtained is evaluated over a period of 6 months in an aqueous environment.
- the quantities of impurities (degradation products) as well as the quantity of L-glutamine are measured at regular intervals.
- the stability of the complex is evaluated under normal storage conditions (25 °C, 60% relative humidity) at a concentration of 10 mM in distilled water. The result of this study is that the complex presents a consistent quantity of L-glutamine (> 95%) over the entire duration of stability, i.e. 6 months.
- the complex according to the present invention therefore allows excellent stability in aqueous environments over a period of at least 6 months.
- Example 4 Preparation of a composition comprising the glutamine - tannic acid complex.
- a composition according to the invention was prepared by mixing the different ingredients listed in Table 1, below.
- the composition of the composition is detailed below and comes in the form of a serum.
- Example 5 Evaluation of the stability of the composition according to the invention.
- the stability of the composition described in Example 4 is evaluated over a period of 6 months in an aqueous media.
- the quantities of impurities (degradation products) as well as the quantity of L-glutamine are measured at regular intervals.
- the stability of the complex is evaluated under normal storage conditions (25°C, 60% relative humidity). The result of this study is that the composition presents a consistent quantity of L-glutamine (> 95%) over the entire duration of stability, i.e. 6 months.
- the composition according to the present invention therefore allows excellent stability over a period of at least 6 months. Evaluation of activity of the composition according to invention in a non-therapeutic use for the treatment of periocular dark circles.
- the subjects are over 18 years old, male or female, and have a phenotype 2 to 4.
- the exclusion criteria are the continuation of cosmetic surgery treatment, being pregnant, sensitivity to one of the active ingredients , the use of depigmenting products, skin diseases (skin infections, eczema, psoriasis, rosacea, herpes, etc.) and severe allergies.
- Subjects are evaluated 2, 4, 8 and 12 weeks after the start of treatment.
- the doctor performs chromametry using a colorimeter (Dermacatch®).
- a numerical evaluation is carried out according to the following scale:
- composition according to the invention leads to a marked reduction in periocular dark circles. 7: Evaluation of activity of the composition according to invention in therapeutic use for the treatment of dermatological lesions.
- Spider veins are typically treated with sclerotherapy or vascular laser treatment. However, many patients experience tingling, bruising and hemosiderin deposits around the treated area. Other side effects of this type of treatment are depigmentation of the skin, discomfort and the appearance of raised red areas around the injection areas.
- This study aims to evaluate the activity of the composition described in Example 4, above, on the treatment of dermatological lesions caused by the treatment of varicose veins by serotherapy or by vascular laser.
- the activity of the composition is evaluated for its activity on bruises in the treated areas.
- the patients are over 18 years old, women, and present a phenotype 1 to 4.
- the exclusion criteria are being pregnant, sensitivity to one of the active ingredients, use of depigmenting products, diseases of the skin (skin infections, eczema, psoriasis, rosacea, herpes, etc.) and severe allergies.
- the subjects receive a 15 mL vial containing the composition described in Example 4, above.
- the composition is applied only in the morning and evening on bruises present on the legs.
- the quantity of composition applied is adjusted for good penetration.
- the duration of treatment is 8 weeks.
- Subjects are evaluated 0, 4 and 8 weeks after the start of treatment.
- the doctor performs chromametry using a colorimeter (Dermacatch®).
- a numerical evaluation is carried out according to the following scale:
- compositions according to the invention leads to a marked reduction in lesions.
- Example 8 Evaluation of the homogeneous nature of compositions comprising glutamine - tannic acid complexes having different tannic acid: glutamine molar ratios.
- compositions shown in Table 2 below were formulated by dissolving glutamine - tannic acid complexes in water having different tannic acid: glutamine molar ratios.
- the homogeneous nature of the solutions obtained that is to say the presence or absence of a precipitate, was determined.
- compositions according to the present invention that is to say the compositions for which the tannic acid: glutamine molar ratio is between 1: 1 and 1: 6, in particular for which the molar ratio tannic acid: glutamine is between 1:1 and 1:5, are homogeneous (no presence of precipitate).
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Abstract
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23798169.1A EP4608391A1 (fr) | 2022-10-26 | 2023-10-25 | Complexes glutamine - acide tannique et leur utilisation dans le traitement de taches pigmentaires |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE20225871A BE1030448B1 (fr) | 2022-10-26 | 2022-10-26 | Complexe glutamine acide - tannique |
| BEBE2022/5871 | 2022-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024089076A1 true WO2024089076A1 (fr) | 2024-05-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2023/079728 Ceased WO2024089076A1 (fr) | 2022-10-26 | 2023-10-25 | Complexes glutamine - acide tannique et leur utilisation dans le traitement de taches pigmentaires |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4608391A1 (fr) |
| BE (1) | BE1030448B1 (fr) |
| WO (1) | WO2024089076A1 (fr) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001064155A (ja) * | 1999-08-30 | 2001-03-13 | Shiga Yoko | 新美白料素材 |
| CN106265429A (zh) * | 2016-08-24 | 2017-01-04 | 王志英 | 一种含有依兰精油的美白护肤乳液 |
| US20200009034A1 (en) * | 2016-12-21 | 2020-01-09 | Conopco, Inc., D/B/A Unilever | Topical skin lightening additive and composition with amino acids and ppar activating fatty acids |
-
2022
- 2022-10-26 BE BE20225871A patent/BE1030448B1/fr active IP Right Grant
-
2023
- 2023-10-25 EP EP23798169.1A patent/EP4608391A1/fr active Pending
- 2023-10-25 WO PCT/EP2023/079728 patent/WO2024089076A1/fr not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001064155A (ja) * | 1999-08-30 | 2001-03-13 | Shiga Yoko | 新美白料素材 |
| CN106265429A (zh) * | 2016-08-24 | 2017-01-04 | 王志英 | 一种含有依兰精油的美白护肤乳液 |
| US20200009034A1 (en) * | 2016-12-21 | 2020-01-09 | Conopco, Inc., D/B/A Unilever | Topical skin lightening additive and composition with amino acids and ppar activating fatty acids |
Non-Patent Citations (3)
| Title |
|---|
| DATABASE GNPD [online] MINTEL; 1 September 2020 (2020-09-01), ANONYMOUS: "Instant Glow Serum", XP093050338, retrieved from https://www.gnpd.com/sinatra/recordpage/8022145/ Database accession no. 8022145 * |
| KOVACEVIC Z.MCGIVAN J.: "Mitochondrial metabolism of glutamine andglutamate andits physiological significance", PHYSIOL REV, vol. 63, 1983, pages 547 - 605 |
| MENDEL MARTA ET AL: "Phytogenic feed additives as potential gut contractility modifiers-A review", ANIMAL FEED SCIENCE AND TECHNOLOGY, ELSEVIER, AMSTERDAM, NL, vol. 230, 13 May 2017 (2017-05-13), pages 30 - 46, XP085113758, ISSN: 0377-8401, DOI: 10.1016/J.ANIFEEDSCI.2017.05.008 * |
Also Published As
| Publication number | Publication date |
|---|---|
| BE1030448B1 (fr) | 2023-11-10 |
| EP4608391A1 (fr) | 2025-09-03 |
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