Method to protect skin from ultraviolet radiation using novel peptides involved in the improvement of microparasol organization in keratinocytes

1. A cosmetic method for improving microparasol organization in keratinocytes, the method comprising applying a composition comprising a peptide compound having one of the following sequences:

(SEQ ID NO: 1)

Ser-Cys-Arg-Asp-Leu-Lys-Lys-Thr-NH 2 ;

or

(SEQ ID NO: 2)

Asn-Ser-Ser-Lys-Asp-Leu-Lys-Lys-Phe-Val-Ala-NH 2 ;

or

(SEQ ID NO: 4)

Gln-Thr-Arg-Asp-Leu-Lys-Lys-Ser-Pro-Lys-Val-NH 2 ;

or

(SEQ ID NO: 5)

Asn-Lys-Asp-Leu-Lys-Lys-Pro-Met;

or

(SEQ ID NO: 6)

His-Asp-Leu-Lys-Lys-Tyr-NH 2 ;

or

(SEQ ID NO: 7)

Asp-Leu-Lys-Lys-NH 2 ;

and

a cosmetically acceptable medium to the appendages or to the affected skin of a subject in need thereof.

2. The method of claim 1 , wherein applying the composition comprises either before ultraviolet radiation exposure or after ultraviolet radiation exposure.

3. The method of claim 1 , wherein applying the composition protects the treated skin or the treated skin appendages against ultraviolet radiation.

4. The method of claim 1 , wherein applying the composition decreases DNA damages caused by ultraviolet radiation in keratinocytes and melanocytes.

5. The method of claim 1 , wherein applying the composition attenuates age-related pigmentation defects and the effects of photoaging on the skin.

6. The method of claim 1 , wherein applying the composition attenuates age-related pigmentation defects.

7. The method of claim 1 , wherein applying the composition decreases skin tone irregularities and unifies skin tone.

8. The method of claim 1 , wherein the composition comprises said peptide compound solubilized in one or more physiologically acceptable solvents, selected from the group consisting of water, glycerol, ethanol, propanediol, butylene glycol, dipropylene glycol, ethoxylated or propoxylated diglycols, cyclic polyols, or any mixture of these solvents.

9. The method of claim 1 , wherein the composition comprises said peptide compound at a concentration of between approximately 0.01 and 5 parts per million (ppm).

10. The method of claim 1 , wherein the composition comprises, in addition to the said peptide compound, one or more other active ingredients selected from the group consisting of sunscreens, ultraviolet and Infrared screens, anti-free radical agents, DHEA (dehydroepiandrosterone), vitamin A, retinoic acid, retinol, retinol proprionate retinol palmitate, vitamin B3, niacinamide, niconitate of tocopherol, vitamin B5, vitamin B6, vitamin B12, panthenol, vitamin C, ascorbyl glucoside, ascorbyl tetrapalmitate, magnesium, sodium ascorbyl phosphate, vitamin E, vitamin F, vitamin H, vitamin K, vitamin PP, coenzyme Q10, metalloproteinase inhibitors, activators of TIMP, arginine, ornithine, hydroxyproline, hydroxyproline dipalmitate, palmitoylglycine, hydroxylysine, methionine and its derivatives, Nacylated aminoacids, natural or synthetic peptides, including, di-, tri-, tetra-, penta- and hexapeptides and their lipophilic derivatives, isomers and complex of peptides with metallic ions and notably copper, zinc, manganese or magnesium, peptidic plant extracts obtained by hydrolysis or any other methods, yeast extract, artemia salina extract, dehydroacetic acid (DHA), natural or synthetic phystosterols, alpha- and beta-hydroxyacids, silanols, sugar amines, glucosamine, D-glucosamine, N-acetyl-glucosamine, N-acetyl-D-glucosamine, mannosamine, N-acetyl mannosamine, galactosamine, N-acetyl galactosamine, polyphenols, isoflavones, flavonoids, polyphenolic grape polyphenolic extract, pine extract, polyphenolic olive extract, ceramides, phospholipids, squalenes, squalanes, almond oil, coconut oil, castor oil, jojoba oil, olive oil, rapeseed oil, peanut oil, sunflower oil, wheat germ oil, corn germ oil, soybean oil, cotton oil, alfalfa oil, poppy oil, pumpkin seed oil, evening primrose oil, millet oil, barley oil, rye oil, safflower oil, passion oil, hazelnut oil, palm oil, apricot kernel oil, avocado oil, calendula oil, ethoxylated vegetable oils, and shea butter.