Abstract
The number of epidermal melanocytes positive to the dopa reaction increased when skin explants from newborn mice were cultured with MSH or dbc-AMP. These agents seem to induce melanogenesis in the pre-existing melanoblasts. This hormone-induced melanogenesis is suppressed by actinomycin D or cycloheximide, suggesting that the initiation of melanogenesis in the epidermal melanoblasts requires de novo transcription and translation.
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