Novel c-glycoside derivatives and use

Cosmetic use of a C-glycoside derivative corresponding to the following formula (I): in which, - S represents D-xylose - the S-CH2X bond represents a bond of C-anomeric nature, - X represents a selected group between: -CO-, -CH (OH), -CH (NR1R2) -, -CHR'-, -C (> = CHR ') -, - R represents a linear or branched, saturated or branched, perfluoroalkyl, hydrofluoroalkyl chain unsaturated, a cycloalkyl, cycloperfluoroalkyl, cyclohydrofluoroalkyl ring, comprising from 1 to 18 carbon atoms, a phenyl or benzyl radical, said chain, said ring or said radical being possibly interrupted by one or several heteroatoms selected from oxygen, sulfur, nitrogen, silicon, and eventually substituted by at least one radical selected from -OR'1, -SR "1, -NR '" 1R'2, -COOR "2, -CONHR"' 2, -CN, halogen, perfluoroalkyl, hydrofluoroalkyl and / or at least one optionally substituted cycloalkyl, aryl, heterocyclic radical, - R ', R1 , R2, identical or different, have the same definition as that given for R, and may equally represent a hydrogen and a hydroxyl radical, - R'1, R'2, R "1, R" 2, R '"1, R "'2, identical or different, represent a hydrogen atom, a radical selected from an alkyl, hydroxyl, perfluoroalkyl and / or hydrofluoroalkyl, linear or branched, saturated or unsaturated radical, comprising from 1 to 30 carbon atoms, as well as their physiologically acceptable salts, and their optical isomers, or of a composition comprising, in a physiologically acceptable medium, said C-glycoside derivative of formula (I), to stimulate the synthesis of glycosaminoglycans containing a D-glucosamine and / or Nacetyl residue -D-glucosamine, and / or proteoglycans, by fibroblasts and / or keratinocytes.