Péptidos que tienen actividades del factor de crecimiento epidérmico y sus usos

Un péptido que tiene la actividad de crecimiento celular del factor de crecimiento epidérmico (EGF), quecomprende la secuencia de aminoácidos representada por la siguiente fórmula 1: Cys-Met-Tyr-Ile-Glu-Ligador-Arg-Gly-Asp (1) en la que el ligador está representado por Xaa(n), Xaa es cualquier aminoácido y n es un número entero de 2-18. The present invention relates to peptides comprising the amino acid sequence represented by the following formula 1 and having the activities of epidermal growth factor and their uses: Cys-Met-Tyr-Ile-Glu-Linker-Arg-Gly-Asp (1) The EGF-mimicking peptides of the present invention possess identical functions or activities to natural-occurring human EGF and are able to promote the generation of autocrine EGF in cells. In addition the peptides of the present invention are much higher stability and skin penetration potency than natural-occurring EGF. Therefore, the composition containing the peptide exhibits excellent treatment and prevention efficacies on diseases or conditions demanding EGF activities, and can be advantageously applied to pharmaceutical compositions, quasi-drugs and cosmetics.