Abstract
Summary
“Dopa oxidase” activity was absent in melanocytes of telogen hair follicles of non-irradiated mice. Following partial-body exposure to 200 r week of X-radiation for 3 or 4 weeks, numerous dopa reactive dendritic cells were observed in the epithelial germ regions of irradiated quiescent hair follicles. Cells of the dermal papillae in irradiated and non-irradiated telogen hair follicles failed to exhibit “dopa oxidase” activity. The results thus support the view that melanocytes normally are restricted to the epithelial germ regions of hair follicles during telogen stage of hair growth cycle.
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