A peptide according to the present invention can perform a function identical or similar to the function of natural CTLA-4 and has an excellent degree of skin penetration due to a small size. The peptide according to the present invention effectively binds to antigen presenting cell surface proteins (CD80 and CD86) to inhibit activity of T cells and thus is capable of inhibiting the expression of inflammatory cytokines (for example, IL-2 and IFN-γ). As a result, a composition comprising the peptide according to the present invention exhibits excellent effects in terms of preventing, treating, or improving Th1-mediated immune diseases. Therefore, the superior activity and stability of the peptide according to the present invention can be useful when applied to medicine, quasi-drugs, and cosmetics.
根据本发明的肽能够执行与天然CT
LA-4相同或类似的功能,并且由于体积小,具有出色的皮肤渗透性。根据本发明的肽有效地结合到抗原呈递细胞表面蛋白(CD80和CD86)上,以抑制T细胞的活性,从而能够抑制炎症细胞因子(例如I
L-2和IFN-γ)的表达。因此,包含根据本发明的肽的组合物在预防、治疗或改善Th1介导的免疫性疾病方面表现出优异效果。因此,根据本发明的肽的优越活性和稳定性在应用于药物、准药物和化妆品时可能非常有用。