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  • Title: Control of sebaceous gland function in the rat by alpha-melanocyte-stimulating hormone.
    Author: Thody AJ, Shuster S.
    Journal: J Endocrinol; 1975 Mar; 64(3):503-10. PubMed ID: 1133539.
    Abstract:
    The effect of alpha-MSH on sebum secretion and preputial gland weight was examined in intact, castrated and hypophysectomized male rats and in hypophysectomized rats receiving treatment with either testosterone propionate (TP) or progesterone. After treatment with alpha-MSH for 2 weeks, increases in sebum secretion occurred in intact, castrated and hypophysectomized rats, but larger responses were found in the hypophysectomized rats that had received treatment with either TP or progesterone, suggesting that alpha-MSH acts synergistically with TP and progesterone to stimulate sebum secretion. Alpha-Melanocyte-stimulating hormone also increased preputial gland weight in intact rats, but there was no response after castration and only a small response after hypophysectomy. However, when the hypophysectomized rats received simultaneous treatment with either TP or progesterone, alpha-MSH increased preputial gland weight. It is suggested that alpha-MSH acts directly on the sebaceous glands to stimulate lipogenesis and, together with steroid hormones, may have an important role in controlling sebaceous glandd function in the rat and other hairy mammals. With the evolution of hair, certain of the MSH peptides may have lost their significance as pigmentary hormones and have developed a sebotrophic function. For this reason, it might be more appropriate to refer to these peptides as the 'sebotrophins'.
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