title: Structure-activity studies with ACTH/alpha-MSH fragments on corticosteroid secretion of isolated zona glomerulosa and fasciculata cells.
abstract: The steroidogenic action of ACTH/alpha-MSH fragments was studied on isolated zona glomerulosa and zona fasciculata cells dispersed by collagenase. ACTH-(4-7), ACTH-(6-10), ACTH-(4-10) and ACTH-(11-13) stimulated corticosterone production of the zona fasciculata and aldosterone production of the zona glomerulosa cells. ACTH-(7-10) was ineffective. ACTH-(4-7) appeared to be the most potent peptide of the tested fragments. None of the fragments affected the steroidogenic action of ACTH-(1-39). It is suggested that similar to the melanotropic effect of alpha-MSH two 'message' sequences for adrenocortical stimulation exist in the alpha-MSH part of the ACTH molecule.
mesh_terms: D000302:Adrenal Cortex / Q000187:drug effects / Q000378:metabolism*; D000324:Adrenocorticotropic Hormone / Q000031:analogs & derivatives* / Q000494:pharmacology*; D000450:Aldosterone / Q000378:metabolism*; D000818:Animals; D003345:Corticosterone / Q000378:metabolism*; D066298:In Vitro Techniques; D007700:Kinetics; D008297:Male; D009074:Melanocyte-Stimulating Hormones / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains; D013329:Structure-Activity Relationship
chemical_list: D000450:Aldosterone; D000324:Adrenocorticotropic Hormone; D009074:Melanocyte-Stimulating Hormones; D003345:Corticosterone