The present invention relates to peptidic compounds of general formula (I): R1&mdash；X1-Arg-Lys-Gly-X2&mdash；R2. In addition, the present invention relates to, on the one hand, a cosmetic or pharmaceutical composition comprising at least one peptide of general formula (I), in a cosmetically or pharmaceutically acceptable medium and, on the other hand, its utilization to prevent or treat the cutaneous signs of aging and photo-aging and to protect the skin from aggressions due to UV radiation. Lastly, the invention applies to a cosmetic treatment process intended to prevent and/or combat the cutaneous signs of aging and photo aging.
