Cosmetic and/or pharmaceutical composition comprising a relieving peptidic hydrolyzate

1. A method for soothing sensitive skin, the method comprising:

providing a composition comprising a peptidic hydrolyzate comprising a bioactive peptide comprising 4 to 6 amino acids comprising at least one glycine residue, one leucine residue, and one glutamic acid residue; as an active principle agent activating 3-hydroxy-3-methylglutaryl-Coenzyme A (HMG-CoA) reductase; and

topically applying the composition to the skin to be treated.

2. The method of claim 1 , wherein the composition further comprises a suitable medium selected from the group consisting of water, glycerol, ethanol, propylene glycol, butylene glycol, dipropylene glycol, ethoxylated or propoxylated diglycols, cyclic polyols, vaseline, a vegetable oil, and combinations thereof; and the peptidic hydrolyzate reinforces the barrier function of the epidermis.

3. The method of claim 1 , wherein said bioactive peptide has general formula (I):

X 1 -[Gly,Glu,Leu]-X 2 -X 3

in which,

X 1 is alanine, valine, isoleucine or absent,

X 2 is serine or threonine,

X 3 is leucine, isoleucine or absent.

4. The method of claim 3 , wherein said bioactive peptide is selected from the group consisting of:

(SEQ ID NO: 1)

Ala-Glu-Gly-Leu-Ser-Ile,

(SEQ ID NO: 2)

Leu-Gly-Glu-Ser-Leu,

(SEQ ID NO: 3)

Val-Gly-Glu-Leu-Thr,

(SEQ ID NO: 4)

Ile-Gly-Glu-Leu-Ser,

(SEQ ID NO: 5)

Ala-Gly-Glu-Leu-Ser,

(SEQ ID NO: 6)

Gly-Glu-Leu-Thr-Ile, and

(SEQ ID NO: 7)

Gly-Glu-Leu-Ser.

5. The method of claim 1 , wherein said peptidic hydrolyzate originates from the hydrolysis of plants selected from the group consisting of einkorn ( Triticum monococum ), potato ( Solanum tuberosum ), corn ( Zea mayz L.), barley ( Hordeum vulgare L.), and rapeseed ( Brassica napus ).

6. The method of claim 1 , wherein said peptidic hydrolyzate contains said bioactive peptide in the range of 0.5 to 5.5 g/l.

7. The method of claim 1 , wherein said peptidic hydrolyzate is present in a quantity representing 0.0001% to 20% of the total composition weight.

8. The method of claim 1 , wherein the peptidic hydrolyzate is present in a quantity representing from 0.05% to 5% of the total weight of the composition.

9. The method according to claim 1 , further comprising dissolving said peptidic hydrolyzate in one or more solvents selected from the group consisting of water, glycerol, ethanol, propylene glycol, butylene glycol, dipropylene glycol, ethoxylated or propoxylated diglycols, cyclic polyols, vaseline, a vegetable oil, and combinations thereof.

10. The method of claim 1 , wherein the composition is present in a form suitable for topical application.

11. The method of claim 1 , wherein the composition further comprises at least one first active principle agent promoting the action of said peptidic hydrolyzate selected from the group consisting of other peptide active agents, plant extracts, healing agents, anti-ageing agents, anti-wrinkle agents, soothing agents, free radical scavengers, antioxidizing agent, ultraviolet (UV) screens, agents stimulating the synthesis of dermal macromolecules or energy metabolism, moisturizers, antibacterial agents, antifungal agents, anti-inflammatory agents, anaesthetics, agents modulating skin differentiation or pigmentation or skin depigmentation, and agents stimulating the growth of the nails or hair.

12. The method of claim 1 , wherein the composition further comprises at least one second active principle selected from the group consisting of glycolic acid, lactic acid, malic acid, citric acid, tartaric acid, mandelic acid, salicylic acid, ascorbic acid or vitamin C, retinol, retinal, retinoic acid, minoxidil, lithium salts, para-phenylene diamine (p-PDA), N-phenyl p-PDA and toluene 2,5-diamine sulphate, meta-phenylene diamine (m-PDA), toluene, 3,4-diamine, ortho-phenylene diamine (o-PDA), fragrancing alcoholic solutions, aluminum salts, thiols, ammonia, and hydroquinone, the second active principle providing a secondary irritant effect.

13. The method of claim 1 , the method comprising:

providing a composition comprising a bioactive peptide selected from the group consisting of:

(SEQ ID NO: 1)

Ala-Glu-Gly-Leu-Ser-Ile,

(SEQ ID NO: 2)

Leu-Gly-Glu-Ser-Leu,

(SEQ ID NO: 3)

Val-Gly-Glu-Leu-Thr,

(SEQ ID NO: 4)

Ile-Gly-Glu-Leu-Ser,

(SEQ ID NO: 5)

Ala-Gly-Glu-Leu-Ser,

(SEQ ID NO: 6)

Gly-Glu-Leu-Thr-Ile,

and

(SEQ ID NO: 7)

Gly-Glu-Leu-Ser,

wherein the composition treats skin irritations.

14. The method of claim 1 , the method comprising:

providing a composition comprising a bioactive peptide selected from the group consisting of:

(SEQ ID NO: 1)

Ala-Glu-Gly-Leu-Ser-Ile,

(SEQ ID NO: 2)

Leu-Gly-Glu-Ser-Leu,

(SEQ ID NO: 3)

Val-Gly-Glu-Leu-Thr,

(SEQ ID NO: 4)

Ile-Gly-Glu-Leu-Ser,

(SEQ ID NO: 5)

Ala-Gly-Glu-Leu-Ser,

(SEQ ID NO: 6)

Gly-Glu-Leu-Thr-Ile,

and

(SEQ ID NO: 7)

Gly-Glu-Leu-Ser,

wherein the composition limits the effects of external stresses chosen from ultraviolet (UV) radiation or oxidizing agents on skin.

15. The method of claim 1 , the method comprising:

providing a composition comprising a bioactive peptide selected from the group consisting of:

(SEQ ID NO: 1)

Ala-Glu-Gly-Leu-Ser-Ile,

(SEQ ID NO: 2)

Leu-Gly-Glu-Ser-Leu,

(SEQ ID NO: 3)

Val-Gly-Glu-Leu-Thr,

(SEQ ID NO: 4)

Ile-Gly-Glu-Leu-Ser,

(SEQ ID NO: 5)

Ala-Gly-Glu-Leu-Ser,

(SEQ ID NO: 6)

Gly-Glu-Leu-Thr-Ile,

and

(SEQ ID NO: 7)

Gly-Glu-Leu-Ser,

wherein the composition is a pharmaceutical composition that treats skin inflammation, or pruritus, hives, insect bites, allergies or alopecia in its inflammatory phases.