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Melanocytes present at the basement layer of the epidermis and respond to various factors secreted by underlying dermal fibroblasts in the dermis to regulate the function of the skin.<\/jats:p><\/jats:sec><jats:sec><jats:title>Objective<\/jats:title><jats:p>Therefore the study was planned to check the expression of fibroblast\u2010derived factor neuregulin1 (NRG1) in vitiligo skin and its effect on melanocytes.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>For this study, relative gene expression at mRNA level of NRG1 in the vitiligo skin was analyzed by qRT\u2010PCR, and protein analysis was done by immunohistochemistry. Effect of different concentrations of NRG1 was checked on the cultured melanocytes by melanin content assay, proliferation assay, and tyrosinase (TYR) assay. The effect of NRG1 was also checked on the level of melanocyte regulatory genes (MITF, c\u2010KIT, TYR, DCT).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Expression of NRG1 was significantly less in lesional dermis of vitiligo patients as compared to nonlesional and healthy control dermis both at mRNA as well as protein level. NRG1 treatment showed significant increase in proliferation, melanin content, TYR level, and gene expression level of melanocyte specific genes.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Treatment of NRG1 to the cultured melanocytes increases proliferation and pigmentation. Lower expression of NRG1 in the lesional dermis of vitiligo patients inhibits the melanocyte growth. Therefore this study hypothesized that low expression of NRG1 in lesional skin of vitiligo patients might have a possible role in the melanocyte loss and vitiligo pathogenesis.<\/jats:p><\/jats:sec>","DOI":"10.1111\/ijd.14161","type":"journal-article","created":{"date-parts":[[2018,8,7]],"date-time":"2018-08-07T05:23:07Z","timestamp":1533619387000},"page":"242-249","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Decreased expression of neuregulin1 in the lesional skin of vitiligo patients"],"prefix":"10.1111","volume":"58","author":[{"given":"Seema","family":"Rani","sequence":"first","affiliation":[{"name":"Department of Zoology Panjab University Chandigarh India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Uma","family":"Kumari","sequence":"additional","affiliation":[{"name":"Department of Zoology Panjab University Chandigarh 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