title: The anomalous effect of some ACTH-fragments missing the amino acid sequence 1-10 on the corticosteroidogenesis in purified isolated rat adrenal cells.
abstract: The corticosteroidogenicity of ACTH-derived peptides was tested in a purified isolated rat adrenal cell system. The activity was related to the activity of standard ACTH (synthetic hACTH; potency fixed at 100). The peptides ACTH NH2 and ACTH showed steroidogenicity at pharmacological doses (potencies: 0.00067 and 0.00032, respectively). None of the peptides tested inhibited or potentiated the ACTH-induced steroidogenesis at low doses (0.5-50 000 pg). The results suggest the presence of a second center within the ACTH molecule capable of inducing steroidogenesis.
mesh_terms: D000302:Adrenal Cortex / Q000187:drug effects*; D000305:Adrenal Cortex Hormones / Q000096:biosynthesis*; D000324:Adrenocorticotropic Hormone / Q000031:analogs & derivatives* / Q000494:pharmacology; D000595:Amino Acid Sequence; D000818:Animals; D002478:Cells, Cultured; D010446:Peptide Fragments / Q000494:pharmacology; D051381:Rats; D013329:Structure-Activity Relationship
chemical_list: D000305:Adrenal Cortex Hormones; D010446:Peptide Fragments; D000324:Adrenocorticotropic Hormone