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  • Title: Hormonal activation of adenylate cyclase and its role in cyclic AMP mediated regulation of RNA synthesis in the mouse mammary gland.
    Author: Chomczynski P, Zwierzchowski L.
    Journal: Acta Biochim Pol; 1978; 25(1):29-36. PubMed ID: 208333.
    Abstract:
    The activity of adenylate cyclase (EC 4.6.1.1) in the mouse mammary gland increases during late pregnancy and reaches its maximum value at one day pre partum. In the mouse mammary gland explant culture the adenylate cyclase activity is stimulated by a cooperative action of insulin, prolactin and hydrocortisone. The effect of these hormones can be demonstrated in intact cells, but not in a cell-free system. In the explants, RNA synthesis is stimulated by dibutyryl cyclic AMP, insulin and prolactin. The effects of both protein hormones and cyclic AMP are additive. The results obtained suggest that insulin and prolactin in cooperation with hydrocortisone are involved in the regulation of RNA synthesis in the mammary gland by activation of the adenylate cyclase system, independently of their effect on this process not mediated by cyclic AMP.
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