Alpha-melanocyte-stimulating hormone suppresses antigen-induced lymphocyte proliferation in humans independently of melanocortin 1 receptor gene status.

Abstract excerpt

Studies in mice indicate that alpha-melanocyte-stimulating hormone (alphaMSH) is immunosuppressive, but it is not known whether alphaMSH suppresses human immune responses to exogenous Ags. Human PBMCs, including monocytes, express the melanocortin 1 receptor (MC1R), and it is thought that the ability of alphaMSH to alter monocyte-costimulatory molecule expression and IL-10 release is mediated by this receptor....

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