A compound of general formula (I): R1-Wn-Xm-AA1-AA2-AA3-AA4-AA5-AA6-AA7-AA8-AA9-Yp-Zq-R2 (I) its stereoisomers, mixtures thereof and / or its cosmetically or pharmaceutically acceptable salts, characterized in that: (i) AA1 is selected from the group consisting of -Arg-, -His-, -Lys, -Gln-, -Asn-, -Glu- and -Asp-； AA2 is selected from the group consisting of -Arg-, -His-, -Lys-, -Gln-, -Asn- and -Asp-； AA3 is selected from the group consisting of -Glu- and -Phe-； AA4 is -His-； AA5 is selected from the group consisting of -Arg-, -His-, -Lys-, -Gln- and -Asn-； AA6 is -Lys-； AA7 is selected from the group consisting of -Met-, -MetO- and -MetO2-； AA8 is -Asp-； AA9 is a link； or (ii) AA1 is selected from the group consisting of -Gln-, -Asn-, -Glu- and -Asp-； AA2 is selected from the group consisting of -Gln-, -Asn- and -Asp-； AA3 is selected from the group consisting of -Glu- and -Leu-； AA4 is -Glu-； AA5 is selected from the group consisting of -Arg-, -His-, -Lys-, -Gln- and -Asn-； AA6 is -Ile-； AA7 is selected from the group consisting of -Met-, -MetO- and -MetO2-； AA8 is -Asp-； and AA9 is selected from the group consisting of -Gln- and -Asn-； and W, X, Y, Z are amino acids and are independently selected from each other； n, m, p and q are independently selected from each other and have a value of 0 or 1； n + m + p + q is less than or equal to 2； R1 is selected from the group consisting of H, a polymer derived from polyethylene glycol, a substituted or unsubstituted non-cyclic aliphatic group, substituted or unsubstituted alicyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted heteroaryl alkyl, substituted or unsubstituted aryl, aralkyl substituted or unsubstituted and R5-CO-, wherein R5 is selected from the group consisting of H, a substituted or unsubstituted non-cyclic aliphatic group, substituted or unsubstituted alicyclyl, substituted or unsubstituted aryl, substituted or unsubstituted aralkyl, substituted or unsubstituted heterocyclyl and
