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Article

Local Epidermal Endocrine Estrogen Protects Human Melanocytes against Oxidative Stress, a Novel Insight into Vitiligo Pathology

1
Department of Pigmentation Research and Therapeutics, Graduate School of Medicine, Osaka City University, Osaka 545-0051, Japan
2
Department of Dermatology, Graduate School of Medicine, Osaka City University, Osaka 545-0051, Japan
3
Biological Science Laboratories, Kao Corporation, Kanagawa 250-0002, Japan
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2021, 22(1), 269; https://doi.org/10.3390/ijms22010269
Received: 29 November 2020 / Revised: 22 December 2020 / Accepted: 25 December 2020 / Published: 29 December 2020
As the outermost barrier of the body, skin is a major target of oxidative stress. In the brain, estrogen has been reported synthesized locally and protects neurons from oxidative stress. Here, we explored whether estrogen is also locally synthesized in the skin to protect from oxidative stress and whether aberrant local estrogen synthesis is involved in skin disorders. Enzymes and estrogen receptor expression in skin cells were examined first by quantitative real-time PCR and Western blot analyses. Interestingly, the estrogen synthesis enzyme was mainly localized in epidermal keratinocytes and estrogen receptors were mainly expressed in melanocytes among 13 kinds of cultured human skin cells. The most abundant estrogen synthesis enzyme expressed in the epidermis was 17β-hydroxysteroid dehydrogenase 1 (HSD17β1) localized in keratinocytes, and the most dominant estrogen receptor expressed in the epidermis was G protein-coupled estrogen receptor 1 (GPER1) in melanocytes. To investigate whether keratinocyte-derived estradiol could protect melanocytes from oxidative stress, cultured human primary epidermal melanocytes (HEMn-MPs) were treated with H2O2 in the presence or absence of 17β estradiol or co-cultured with HSD17β1 siRNA-transfected keratinocytes. Keratinocyte-derived estradiol exhibited protective effects against H2O2-induced cell death. Further, reduced expression of HSD17β1 in the epidermis of skin from vitiligo patients was observed compared to the skin from healthy donors or in the normal portions of the skin in vitiligo patients. Our results suggest a possible new target for interventions that may be used in combination with current therapies for patients with vitiligo. View Full-Text
Keywords: estrogen; vitiligo; oxidative stress; keratinocyte; melanocyte estrogen; vitiligo; oxidative stress; keratinocyte; melanocyte
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MDPI and ACS Style

Yamamoto, A.; Yang, L.; Kuroda, Y.; Guo, J.; Teng, L.; Tsuruta, D.; Katayama, I. Local Epidermal Endocrine Estrogen Protects Human Melanocytes against Oxidative Stress, a Novel Insight into Vitiligo Pathology. Int. J. Mol. Sci. 2021, 22, 269. https://doi.org/10.3390/ijms22010269

AMA Style

Yamamoto A, Yang L, Kuroda Y, Guo J, Teng L, Tsuruta D, Katayama I. Local Epidermal Endocrine Estrogen Protects Human Melanocytes against Oxidative Stress, a Novel Insight into Vitiligo Pathology. International Journal of Molecular Sciences. 2021; 22(1):269. https://doi.org/10.3390/ijms22010269

Chicago/Turabian Style

Yamamoto, Asako, Lingli Yang, Yasutaka Kuroda, Jiao Guo, Lanting Teng, Daisuke Tsuruta, and Ichiro Katayama. 2021. "Local Epidermal Endocrine Estrogen Protects Human Melanocytes against Oxidative Stress, a Novel Insight into Vitiligo Pathology" International Journal of Molecular Sciences 22, no. 1: 269. https://doi.org/10.3390/ijms22010269

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