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• • 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
  • A61K31/192—Carboxylic acids, e.g. valproic acid having aromatic groups, e.g. sulindac, 2-aryl-propionic acids, ethacrynic acid 
• • 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
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
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• • 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
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  • A61P17/00—Drugs for dermatological disorders
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• • A—HUMAN NECESSITIES
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  • A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P3/00—Drugs for disorders of the metabolism
  • A61P3/08—Drugs for disorders of the metabolism for glucose homeostasis
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P3/00—Drugs for disorders of the metabolism
  • A61P3/08—Drugs for disorders of the metabolism for glucose homeostasis
  • A61P3/10—Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
  • A61P31/12—Antivirals
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P35/00—Antineoplastic agents
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P37/00—Drugs for immunological or allergic disorders
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P37/00—Drugs for immunological or allergic disorders
  • A61P37/08—Antiallergic agents
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00

Definitions

• the present invention relates to the use of particular retinoids in the preparation of a pharmaceutical composition in order to increase the rate of apoptosis.
• retinoids can also be used in cosmetic compositions with a view in particular to preventing and / or combating photoinduced or chronological aging of the skin.
• necrosis There are two types of mechanism involved in cell death. The first of the classic type is called necrosis. Morphologically, necrosis is characterized by swelling of the mitochondria and the cytoplasm and by nuclear alteration, followed by the destruction of the cell and its autolysis, this being accompanied by an inflammation phenomenon. Necrosis occurs passively and incidentally. Tissue necrosis is usually caused by physical trauma to the cells or a chemical poison, for example.
• apoptosis The other form of cell death is called apoptosis [Kerr, J.F.R. and Wyllie, A.H., Br. J. Cancer, 265. 239 (1972)], but unlike necrosis apoptosis does not cause inflammation. It is described that apoptosis can be carried out under different physiological conditions. It is a highly selective form of cell suicide which is characterized by easily observable morphological and biochemical phenomena. Thus, we observe in particular a condensation of the chromatin associated or not with an endonuclease activity, the formation of apoptic bodies and a fragmentation of deoxyribonucleic acid (A.D.N.) by the activation of endonucleases into fragments of A.D.N. 180-200 base pairs (these fragments can be observed by agarose gel electrophoresis).
• A.D.N. deoxyribonucleic acid
• Apoptosis can be considered as a programmed death of cells involved in tissue development, differentiation and renewal. It is also considered that the differentiation, growth and maturation of cells are closely linked to apoptosis and that the substances capable of playing a role in the differentiation, growth and maturation of cells are also linked to the phenomenon of apoptosis.
• a voluntary modulation of apoptosis by inducing or suppressing it can make it possible to treat many diseases, more particularly diseases linked to hyperproliferation cellular, such as in the case of cancer, autoimmune diseases or allergies, or on the contrary the diseases linked to a cellular disappearance, such as in the cases of the immunodeficiency syndrome of the human immunodeficiency virus (HIV), neurodegenerative diseases (Alzheimer's disease) or excessive damage induced during myocardial infarction.
• diseases more particularly diseases linked to hyperproliferation cellular, such as in the case of cancer, autoimmune diseases or allergies, or on the contrary the diseases linked to a cellular disappearance, such as in the cases of the immunodeficiency syndrome of the human immunodeficiency virus (HIV), neurodegenerative diseases (Alzheimer's disease) or excessive damage induced during myocardial infarction.
• HAV human immunodeficiency virus
• Alzheimer's disease excessive damage induced during myocardial infar
• anticancer drugs such as dexamethasone, cyclophosphamide and cisplatin, are capable of inducing apoptosis.
• any product which induces the mechanism of apoptosis is a product capable of preventing and / or combating the appearance of aging and existing signs of aging, such as wrinkles and fine lines.
• all-trans retinoic acid is a powerful modulator (ie an inhibitor or, on the contrary, a stimulator, depending on the nature of the cells treated) for the differentiation and proliferation of many cell types normal or processed. For example, it inhibits the differentiation of epithelial cells, such as the keratinocytes of the epidermis. It also inhibits the proliferation of many transformed cells such as melanoma cells.
• RARs Retinoic Acid Receptors
• RXRs The natural ligand of RXRs is 9-c / s- acid retinoic RXRs are considered as "master regulatory proteins" because they interact with other members of the steroid / thyroid receptor superfamily to form heterodimers, as with RARs, such as the vitamin D3 receptor (VDR), trnodothyroxme receptor (TR) and PPARs (Peroxisome Proliferator Activated Receptors)
• RXRs can interact with specific response elements (RXRE) in the form of homodimers
• retinoids Numerous synthetic structural analogues of all-trans retinoic acid or of 9-c / s-ret ⁇ no ⁇ que acid, commonly called “retinoids”, have been described to date in the literature. Some of these molecules are capable of binding and specifically activate the RARs or, on the contrary, the RXRs. In addition, certain analogs can bind and activate a particular RAR receptor subtype ( ⁇ , ⁇ or ⁇ ). Other analogues, finally, do not exhibit any activity.
• a given substance or ligand is said specific for a given receptor family (respectively vis-à-vis a particular receptor of this family) when said substance has an affinity for all of the receptors of this family (respectively for the particular receptor of this family) more stronger than that which it presents elsewhere for all the receivers of any other family (respectively for all the other receivers, of this same family or not)
• 9-c / s retinoic acid and all-trans retinoic acid are modulators of apoptosis (activator or inhibitor of apoptosis in particular depending on the cell type) and that 9- c / s retinoic is the most active of these two modulators, this can be explained by the fact that it activates both RARs and RXRs unlike all-trans retinoic acid which activates only RARs
• the subject of the present invention is the use of at least one agonist ligand specific for RAR- ⁇ type receptors in the preparation of a pharmaceutical composition intended to increase the rate of apoptosis in at least one cell population for which apoptosis can be induced by activation of RAR- ⁇ type receptors
• It also relates to the use of at least one agonist ligand specific for RAR- ⁇ type receptors in a cosmetic composition as an inducer of apoptosis of at least one cell population of the skin for which apoptosis can be induced by activation of RAR- ⁇ type receptors
• this composition can make it possible to prevent and / or fight against photoinduced or chronological aging of the skin, in particular by elimination by apoptosis of the skin cells which have a deficiency in their repairing function and which accumulate over time.
• the pharmaceutical or cosmetic composition according to the invention comprises a physiologically acceptable medium
• agonist ligand specific for RAR- ⁇ type receptors is understood to mean, according to the invention, any agonist ligand having a ratio R of the dissociation constant of this ligand for RAR- ⁇ receptors to the dissociation constant of this ligand for RAR- ⁇ type receptors greater than or equal to 10 and inducing the differentiation of F9 cells
• the dissociation constants are determined by means of tests conventional for those skilled in the art. These tests are described in particular in the following references: (1) “Selective Synthetic Ligands for Nuclear Retinoic Acid Receptor Subtypes” in RETINOIDS, Progress in Research and Clinical Applications, Chapter 19 (pp 261-267), Marcel Dekker Ine, edited by Maria A. Consa and Lester Packer; (2) “Synthetic Retinoids: Receptor Selectivity and Biological Activity” in Pharmacol Skin, Basel, Karger, 1993, Volume. 5, pp 117-127; (3) “Selective Synthetic Ligands for Human Nuclear Retinoic Acid Receptors” in Skin Pharmacology, 1992, Vol.
• the present invention uses agonist ligands specific for RAR- ⁇ type receptors which have an R ratio greater than or equal to 50.
• agonist ligands specific for RAR- ⁇ type receptors which have an R ratio greater than or equal to 50.
• the pharmaceutical composition comprising the specific agonist ligand for receptors of the RAR- ⁇ type will be able to be used when an increase in the rate of apoptosis is necessary.
• this effect will only be obtained in cell populations for which apoptosis can be induced by the activation of receptors of the RAR- ⁇ type and therefore in particular where receptors of the RAR- ⁇ type are present, such as more particularly in cells coming from the thymus.
• An increase in the rate of apoptosis may be necessary in mainly two cases.
• the first concerns diseases or disorders linked to an insufficient rate of apoptosis.
• the second concerns the treatments necessary during a transplant to reduce the rejection effects of the transplanted organ. Indeed, one might think that immunotolerance to the transplanted organ can be increased by decreasing the immune response of T cells by induction of their apoptosis rate.
• disorders due to precancerous conditions or cancers which may be the consequence of a proliferation of certain populations.
• cell autoimmune diseases, allergies or inflammatory reactions, in which there are too many cells causing damage, or in certain viral infections in which virus proteins have an anti-apoptotic effect.
• autoimmune diseases there may be mentioned more particularly msulin-dependent diabetes, chronic active hepatitis, rheumatoid arthritis, pemphigus, multiple sclerosis, myasthenia gravis, systemic lupus erythema, Crohn's disease and psoriasis
• actinic keratosis In the case of cancer, we can more particularly cite lymphomas, carcinomas, such as cancer of the ENT sphere, and hormone-dependent tumors, such as ovarian cancers
• herpes viruses, adenoviruses and smallpox viruses (pox viru ses) Among allergies or inflammatory reactions, we can mention contact eczema, atopic eczema, asthma and hives
• composition according to the invention can be carried out by enteral, parenteral, topical or ocular route.
• pharmaceutical composition is packaged in a form suitable for application by a systemic route (for injection or infusion).
• the composition By enteral route, the composition, more particularly the pharmaceutical composition, can be in the form of tablets, capsules, dragees, syrups, solution suspensions, powders, granules, emulsions, microspheres or nanospheres or lipid or polymeric vesicles allowing controlled release
• the composition may be in the form of solutions or suspensions for infusion or for injection
• the agonist ligands specific for the RAR- ⁇ type receptors used according to the invention are generally administered at a daily dose of approximately 0.01 mg / kg to 100 mg / kg in body weight in 1 to 3 doses.
• the pharmaceutical or cosmetic composition according to the invention is more particularly intended for the treatment of the skin and mucous membranes and can be in the form of ointments, creams, milks, ointments, powders, soaked tampons , solutions, gels, sprays, lotions or suspensions It can also be in the form of microspheres or nanospheres or lipid or polymeric vesicles or of polymeric patches and hydrogels allowing controlled release
• This topical composition can be presented either in anhydrous form or in aqueous form
• the agonist ligands specific for RAR- ⁇ type receptors are used topically or ocularly at a concentration generally between 0.001% and 10% by weight, preferably between 0.1 and 1% by weight, relative to the total weight of the composition
• the present invention finally relates to a process for preventing and / or combating photoinduced or chronological aging of the skin, characterized in that a cosmetic composition inducing apoptosis as described above is applied to the skin, it is that is to say comprising in a cosmetically acceptable medium at least one hgand agonist specific to receptors of the RAR- ⁇ type
• compositions as described above can of course also contain inert or even pharmacodynamically active additives or combinations of these additives, and in particular wetting agents, depigmenting agents such as hydroquinone, azelaic acid, caffeic acid or kojic acid, emollients, hydrating agents such as glycerol, PEG 400, thiamorpholinone, and its derivatives or even urea, antiseborrheic or antiacneic agents, such as S-carboxymethylcysteine, S-benzyl -cysteamine, their salts or their derivatives, or benzoyl peroxide, antifungal agents such as ketoconazole or polymethylene-4,5 ⁇ soth ⁇ azol ⁇ dones-3, antibacterials, carotenoids and, in particular, ⁇ -carotene, anti agents -psonatics such as anthralin and its derivatives, and finally e ⁇ cosa-5,8,11, 14-tetray
• compositions may also contain flavor enhancers, preservatives such as parahydroxybenzoic acid esters, stabilizers, moisture regulators, pH regulators, osmotic pressure modifiers , emulsifying agents, UV-A and UV-B filters, antioxidants, such as ⁇ -tocopherol, butylhydroxyanisole or butylhydroxytoluene
• mice 4 week NMRI male mice (sold by the company LATI, Godollo, Hungary) were used For the induction of apoptosis in the thymus, these male mice were treated by single injection with either 0.5 mg of dexamethasone , or with 0.5 mg of 6-3- (1-Adamantyl) -4-hydroxyphenyl) -2-naphthano ⁇ que acid, dissolved in a mixture of 0.8 ml of physiological saline and 0.2 ml of ethanol
• Dexamethasone is a well-known inducer of apoptosis.
• an involution of the thymus is observed, decrease in the weight of the thymus by approximately 75%, 48 hours after the treatment indicated above. It is the same with the acid 6- 3- (1-Adama ⁇ tyl) ⁇ 4- hydroxyphenyl) -2-naphtano ⁇ que for which there is a decrease in the weight of the thymus of about 60%, 48 hours after treatment
• thymus samples were taken from untreated animals or treated at different times after the treatment. After washing and homogenization, the transglutaminase activity was determined by detecting
• transglutaminase is calculated in nmoles of [Hjputrescine incorporated into the protein per hour
• Tissue transglutaminase is described as one of the effector elements of apoptosis [Piacentini, M et al (1994) Apoptosis The Molecular Basis of Apoptosis m
• This example demonstrates the efficacy in vitro as an inducer of apoptosis of an agonist ligand specific for RAR ⁇ compared to other types of retinoids.
• Thymocyte suspensions are prepared from the thymus glands of male 4 week NMRI mice (sold by the company LATI, G ⁇ d ⁇ llo, Hungary) untreated.
• the medium used is Sigma RPMI 1640 medium supplemented with Gibco fetal calf serum, 2 mM glutamine, 100 IU of penicillin and 100 ⁇ g of streptomycin / ml.
• the thymocytes are then washed and diluted to obtain a final concentration of 10 cells / ml, before incubation at 37 ⁇ C in an humidified incubator under an atmosphere of 5% C0 2 and 95% air. Cell death is measured by taking trypan blue.
• Thymocytes are incubated in 24 wells with various test compounds at different concentrations. After 6 hours of incubation, 0.8 ml of cell suspensions were lysed by addition of 0.7 ml of lysis buffer containing 0.5% (v / v) of Triton X-100, 10mM Tris, 20mM EDTA, pH 8.0, before centrifugation for 15 minutes at 13000g.
• ATRA is all-trans retinoic acid
• 9-cisRA is 9-cis retinoic acid
• CD437 is 6-3- (1-Adamantyl) -4-hydroxyphenyl) -2-naphtanoic acid
• CD666 is (E) -4- (1-hydroxy-1- (5,6,7,8-tetrahydro-5,5,8,8-tetramethyl-2naphthyl) -2-propenyl) benzoic acid,
• CD2325 is 4 - [(E) -2- (3- (1-adamantyl) -4-hydroxyphenyl) -1-propenyl] benzoic acid,
• CD2019 is 6- (3- (1-methylcyclohexyl) -4-methoxyphenyl) -2-naphthanoic acid
• the percentage of DNA fragment in this table corresponds to the difference in percentage of DNA fragment obtained in treated thymocytes and the percentage DNA fragment obtained in untreated thymocytes (basal rate of apoptosis of these thymocytes).

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