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Glycolic acid induces keratinocyte proliferation in a skin equivalent model via TRPV1 activation.

Abstract：

BACKGROUND:Glycolic acid (GA) is the most commonly used alpha-hydroxy acid (AHA) for dermatologic applications, and is considered as a versatile superficial peeling agent for facial rejuvenation. Its therapeutic effect includes acceleration of epidermal turnover without apparent inflammation, and its action is pH-dependent. However, little is known about the molecular mechanism of GA-induced peeling. OBJECTIVE:To investigate the effects of topical application of GA on cell proliferation using a skin equivalent model and to examine the molecular mechanisms of GA-induced peeling. METHODS:GA solution was applied on the surface of a skin equivalent model, and cell proliferation was measured by means of BrdU-incorporation and immunohistochemical methods. Release of chemical mediators such as ATP into the medium was examined. The effects of antagonists of ion channels were also analyzed. RESULTS:At 24h after GA application, BrdU-incorporation into basal keratinocytes was significantly increased. Induction of keratinocyte proliferation was pH-dependent, and was inhibited by antagonists of TRPV1, an acid-sensitive ion channel. Furthermore, transient ATP release was detected in the culture medium after GA stimulation, and this was also suppressed by TRPV1 antagonists. CONCLUSION:These results suggest that one of the mechanisms of GA-induced epidermal proliferation is a growth response of basal keratinocytes to the local elevation of H(+)-ion concentration by infiltrated GA. This response is mediated by TRPV1 activation and ATP release. Activation of P2 receptors by the released ATP may also be involved.

journal_name

J Dermatol Sci

journal_title

Journal of dermatological science

authors

Denda S,Denda M,Inoue K,Hibino T

doi

10.1016/j.jdermsci.2009.11.007

subject

Has Abstract

pub_date

2010-02-01 00:00:00

pages

108-13

issue

2

eissn

0923-1811

issn

1873-569X

pii

S0923-1811(09)00361-2

journal_volume

57

pub_type

杂志文章

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