Stimulates the adrenal cortex to secrete cortisol, corticosterone, aldosterone, and other weakly androgenic substances. Steroidogenic and trophic effects of corticotropin are mediated by activation of adenylate cyclase and increased production of cAMP. Corticotropin also stimulates growth of adrenal cortex and may possess extra-adrenal effects (i.e. melanocyte stimulation, tissue lipase activation). Primary physiologic and pharmacologic effects are secondary to secretion of cortisol. In pharmacologic doses, cortisol decreases inflammation and suppresses the immune response by a variety of mechanisms. The role of corticotropin decreasing infantile spasms may be explained by reducing CRH release.