Biological and Pharmaceutical Bulletin
Online ISSN : 1347-5215
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Cyclohexanediol Bis-Ethylhexanoate Inhibits Melanogenesis of Murine B16 Melanoma and UV-Induced Pigmentation in Human Skin
Joo Hyuck LimSo-Hyun ParkMyoung Rae KimByoung-Sam YooJae Chan YangIn Woo CheongJung Hyun KimJin Hun Cho
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2013 Volume 36 Issue 3 Pages 346-351

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Abstract

The role of cyclohexane diester analogues in the formation of melanin has been recently reported. In the present study, we investigated the inhibitory effect of cyclohexanediol bis-ethylhexanoate (CHEH) on melanogenesis in B16 melanoma cells and on UV-B-induced pigmentation in human skin. CHEH significantly reduced the melanin content in a dose-dependent manner, without cytotoxic effects at the effective concentrations. Moreover, CHEH dose-dependently inhibited tyrosinase activity in B16 melanoma cells, as confirmed by Western blot analysis of the tyrosinase protein levels. However, tyrosinase transcript levels remained unchanged under the same experimental conditions. These results indicate that CHEH inhibited melanogenesis in B16 melanoma cells by regulating tyrosinase activity at the post-transcriptional level. On the other hand, in a cell-free system, CHEH did not inhibit tyrosinase activity. This indicated that CHEH suppressed the pigmentation of melanocytes by indirectly regulating tyrosinase activity. Finally, in a clinical trial, a cream containing 1.0% CHEH showed good whitening effect on UV-induced pigmented human skin without adverse effects. In conclusion, we suggest that CHEH may be an effective inhibitor of melanogenesis and useful effects in the treatment of hyperpigmented disorders.

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© 2013 The Pharmaceutical Society of Japan
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