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Melatonin Receptor MT1 is Expressed in Mouse Skin and <em>In vitro</em> Melatonin Treatment Enhances Whisker Growth | OMICS International | Abstract
ISSN: 2155-9554

Journal of Clinical & Experimental Dermatology Research
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Research Article

Melatonin Receptor MT1 is Expressed in Mouse Skin and In vitro Melatonin Treatment Enhances Whisker Growth

Yukie Yoshida1,2*

1Department of Dermatology, Tsuruoka Municipal Shonai Hospital, Japan

2Department of Dermatology, Yamagata University Faculty of Medicine, Japan

*Corresponding Author:
Yukie Yoshida
Department of Dermatology, Tsuruoka Municipal Hospital
Japan, Izumi-machi 4-20, Tsuruoka city
Yamagata, Japan
Tel:0235 26 5111
Fax: 0235 26 5110
Email: [email protected]

Received date: July 04, 2013; Accepted date: October 01, 2013; Published date: October 07, 2013

Citation: Yoshida Y (2013) Melatonin Receptor MT1 is Expressed in Mouse Skin and In vitro Melatonin Treatment Enhances Whisker Growth. J Clin Exp Dermatol Res 4: 189. doi:10.4172/2155-9554.1000189

Copyright: © 2013 Yoshida Y. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


Melatonin is an amine derivative produced in the pineal body and retina, and is present in all vertebrates. Melatonin production and secretion are regulated by sunlight sensed by the eyes and control circadian rhythms. It mediates its effects through the melatonin receptors MT1 and MT2, expressed in the central nervous system and retina. Recent studies describing the expression of melatonin in mouse skin, binding to epidermal cells and epithelial hair follicles, and positive melatonin receptor antibody staining in human epidermis suggest the presence of melatonin receptors in the skin. However, the exact localization of melatonin receptor expression in the epidermal tissue and hair follicles is unclear. The aim of this study was to determine the precise location of MT1 in mouse skin, hair and whiskers, and to study the growth effects of melatonin on mouse whiskers in vitro. MT1 localization in mouse skin and whiskers was examined immunohistochemically. In addition, organ cultures of mouse whiskers were grown in media containing different concentrations of melatonin, and its effects on whisker growth were evaluated. MT1 was present in the granular layer of mouse epidermal keratinocytes and in the outer root sheath, and in vitro treatment of melatonin enhanced whisker growth. Thus, the effects of melatonin on keratinization suggest it may be useful as a drug for promoting hair growth.


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