Cosmetic or dermatological preparations containing oligo-peptides to lighten the skin of age spots, or to prevent skin tanning, in particular skin tanning caused by UV radiation

摘要

Cosmetic or pharmaceutical compositions comprise one or more monomeric- or homo- or hetero- dimeric-, trimeric- or tetrameric- oligopeptides where the oligopeptides are based upon the sequence Val-Val-Arg-Pro. Cosmetic or pharmaceutical compositions comprise one or more monomeric- or homo- or hetero- dimeric-, trimeric- or tetrameric- oligopeptides where the oligopeptides: (a) are based upon monomers of formula (I) in which a Val may be replaced by Gly, Leu, Ile, Ser, Thr, Met or especially Ala; or (b) are based upon monomers of formula H2N-R-Val-Val-Arg-Pro-R'-COOH (II); or (c) have a molecular weight of 0.5-100 kDa and are based upon single or repeated units of (I) or (II); or (d) are acylated at the N-terminal and are of formula R1-C(=O)-NH-R-Val-Val-Arg-Pro-R'-COOH (III); or (e) are amidated at the C-terminus and are of formula H2N-R-Val-Val-Arg-Pro-R'-C(=O)N(R2)2 (IV); (f) are amidated at the C-terminus and acylated at the N-terminus and are of formula R-C(=O)-NH-R-Val-Val-Arg-Pro-R'-C(=O)-N(R2)2 (V); or (g) are of formula (II)-(V), containing 1-25 Val-Val-Arg-Pro units and where R = a bond or an amino acid sequence with up to 5 amino acid units and R' = an amino acid sequence of up to 15 amino acid units. R, R' = amino acid sequences of 0-5 amino acid units; R1 = hydrocarbon group (especially 1-30C alkyl); R2 = H or R1. An Independent claim is included for use of the above oligopeptides for treatment of unwanted skin-pigmentation.