Abstract: The present invention relates to a method for the in vitro prognosis and/or diagnosis of a common alopecic state of the scalp in a subject, comprising at least one step a) of measuring the expression level, in a biological sample from an area suspected of being an alopecic area or of becoming an alopecic area in said subject, of at least one gene involved in the intercellular junctions of the scalp and/or of the hair follicle chosen from CDH1, ACTB, ACTBL2, TUBB, TUBB2A, GSN, MYO3B, MYO5B, MYO6, DSG2, DSG3, DSG4, DSC2, GJB2, GJA1, GJB6, GJA3, TJP2, CLDN8, CLDN10, CLDN19, and optionally of at least one gene chosen from CTNNB1 and CTNND2, wherein said common alopecic state is chosen from androgenetic alopecia, traction alopecia, female pattern hair loss, cicatricial alopecia, telogen effluvium, stress-related alopecia, seasonal alopecia, age-related alopecia and micro-inflammatory alopecia.

Abstract: The invention relates to the use of matrix cells for obtaining a micro hair follicle and to the use thereof for evaluating the effect of cosmetic, pharmaceutical or dermatological products and also for the prophylactic or therapeutic treatment of a state of reduced pilosity.

Abstract: The invention relates to a process for the in vitro preparation of a dermal papilla equivalent from fibroblasts derived from the dermal papilla and/or from the connective tissue sheath; to a process for the in vitro preparation of a hair follicle equivalent by culturing proliferative epithelial cells on said dermal papillae thus obtained; to the in vitro dermal papilla and hair follicle equivalents produced by means of the abovementioned processes, and to the uses thereof for treating alopecia and for evaluating the effect of cosmetic, pharmaceutical or dermatological products.

Abstract: The invention relates to the use of germ cells for obtaining a micro hair follicle and to the use thereof for evaluating the effect of cosmetic, pharmaceutical or dermatological products and also for the prophylactic or therapeutic treatment of a state of reduced pilosity.

Abstract: The invention relates to a reconstructed scalp model, to the process for preparing it and to its use for evaluating the effect of cosmetic, pharmaceutical or dermatological topical products. The reconstructed scalp according to the invention may also be used for the preparation of the grafts intended for treating cutaneous scalp disorders.

Abstract: The invention relates to the use of matrix cells for obtaining a micro hair follicle and to the use thereof for evaluating the effect of cosmetic, pharmaceutical or dermatological products and also for the prophylactic or therapeutic treatment of a state of reduced pilosity.

Abstract: Epidermis equivalents capable of pigmentation include cells derived from the differentiation of matrix cells; reconstructed skins comprised thereof, optionally containing hair follicles, are useful for evaluating the effect of topical cosmetic, pharmaceutical or dermatological products and may also be used for the preparation of grafts suited to be transplanted on mammals, more particularly on human patients such as victims of third-degree burns.

Abstract: The invention relates to a reconstructed scalp model, to the process for preparing it and to its use for evaluating the effect of cosmetic, pharmaceutical or dermatological topical products. The reconstructed scalp according to the invention may also be used for the preparation of the grafts intended for treating cutaneous scalp disorders.

Abstract: Epidermis equivalents capable of pigmentation include cells derived from the differentiation of matrix cells; reconstructed skins comprised thereof, optionally containing hair follicles, are useful for evaluating the effect of topical cosmetic, pharmaceutical or dermatological products and may also be used for the preparation of grafts suited to be transplanted on mammals, more particularly on human patients such as victims of third-degree burns.

Abstract: Composition for slowing down the loss of hair and for inducing and stimulating its growth, comprising a compound of formula: ##STR1## in which: R.sub.1 and R.sub.2 denote H or an alkyl and do not simultaneously denote H;R.sub.3 and R.sub.4 denote H, an alkyl or a heterocyclic ring with the nitrogen in position 6 and do not simultaneously denote H;X denotes H or a halogen;Y denotes O or OSO.sub.3 ;and their addition salts of physiologically acceptable acids.