Abstract: Process for the treatment of, e.g., visible and/or tactile irregularities of human skin, by applying topically, to the skin, a composition containing, in a physiologically acceptable medium, at least 5% by weight of one or more surfactants comprising at least one alkyl chain having from 6 to 16 carbon atoms.

Abstract: The present invention relates to the cosmetic use of dedifferentiated plant cells of a plant of the Rosa sp. genus, or of an extract or a lyophilizate of said cells, as an active agent for caring for aged skin or aged hair. It also relates to rose dedifferentiated cells, in particular Lancôme rose dedifferentiated cells.

Abstract: The present invention relates to a process for evaluating in vitro at least one active agent capable of preserving the functionality of epithelial stem cells, in particular of maintaining or stimulating the growth and/or the density and/or the renewal of a keratin material, consisting in determining the ability of the active agent(s) to mimic a hypoxic state in the keratin material, the active agent(s) being capable of increasing the expression of at least carbonic anhydrase IX as biological marker of hypoxia, in the keratin material treated with the active agent(s) compared with the keratin material not treated with the active agent(s). It also relates to the use of such a process.

Abstract: The present invention relates to a process for evaluating in vitro at least one active agent capable of preserving the functionality of epithelial stem cells, in particular of maintaining or stimulating the growth and/or the density and/or the renewal of a keratin material, consisting in determining the ability of the active agent(s) to mimic a hypoxic state in the keratin material, the active agent(s) being capable of increasing the expression of at least carbonic anhydrase IX as biological marker of hypoxia, in the keratin material treated with the active agent(s) compared with the keratin material not treated with the active agent(s). It also relates to the use of such a process.

Abstract: The present invention relates to the cosmetic use of dedifferentiated plant cells of a plant of the Rosa sp. genus, or of an extract or a lyophilisate of said cells, as an active agent for caring for aged skin or aged hair. It also relates to rose dedifferentiated cells, in particular Lancôme rose dedifferentiated cells.

Abstract: Process for the treatment of, e.g., visible and/or tactile irregularities of human skin, by applying topically, to the skin, a composition containing, in a physiologically acceptable medium, at least 5% by weight of one or more surfactants comprising at least one alkyl chain having from 6 to 16 carbon atoms.

Abstract: Process for the treatment of human skin, by applying topically onto the skin a composition containing in a physiologically acceptable medium (i) at least one hydroxy acid selected from the ?-hydroxy acids, ?-hydroxy acids, ?-keto acids, ?-keto acids and mixtures thereof, and (ii) at least 5% by weight, relative to the total weight of the composition, of one or more surfactants containing an alkyl chain having from 6 to 16 carbon atoms.