It is intended to provide a substance having an effect of shrinking pores by analyzing the mechanism of making pores perceptible and compositions such as a skin preparation for external use which exerts the above effect to thereby make pores imperceptible. As means for solving these problems, there are provided a parakeratosis inhibitor and a pore-shrinking agent comprising an antagonist to an excitatory cell receptor, for example, a glutamate receptor such as N-methyl-D-aspartic acid receptor or an ATP receptor such as P2X receptor, or an agonist to an inhibitory cell receptor such as a γ-aminobutyrate receptor such as bicuculline-sensitive receptor having the Cl-channel therein or glycine receptor, as well as a skin preparation for external use aiming at inhibiting parakeratosis and a skin preparation for external use aiming at shrinking pores each containing such an antagonist to an excitatory cell receptor or an agonist to an inhibitory cell receptor as described above. Owing to the effects of inhibiting parakeratosis and shrinking pores, the skin can be maintained in a healthy state without perceptible pores.
本发明旨在提供一种通过分析使毛孔可感知的机理而具有收缩毛孔效果的物质,以及可发挥上述效果从而使毛孔不可感知的外用皮肤制剂等组合物。作为解决这些问题的方法,提供了一种角化
抑制剂和毛孔收缩剂,其中包括兴奋性细胞受体的拮抗剂,例如谷
氨酸受体,如
N-甲基-D-天冬氨酸受体或
ATP 受体,如 P2X 受体、或抑制性细胞受体的激动剂,如γ-
氨基
丁酸受体,如具有 Cl-通道的双谷
氨酸敏感受体或甘
氨酸受体,以及旨在抑制角化不全的外用皮肤制剂和旨在收缩毛孔的外用皮肤制剂,每种制剂都含有上述兴奋性细胞受体的拮抗剂或抑制性细胞受体的激动剂。由于具有抑制角化不全和收缩毛孔的作用,皮肤可以保持健康状态,不会出现明显的毛孔。