A photoaffinity label for corticotropin (ACTH) receptors was prepared by selective chemical modification of the single tryptophan residue in the hormone by reaction with 2-nitro-5-azidophenylsulfenyl chloride. The photoreactive derivative, [(2-nitro-5-azidophenylsulfenyl)-Trp9]ACTH (2,5-NAPS-ACTH), stimulated corticosterone synthesis to 60% of the maximal rate induced by ACTH in isolated rat ad...

Immunocytochemical detection of ACTH using the protein A-gold method was performed in the adult male rat anterior pituitary gland after simple glutaraldehyde fixation and double fixation with glutaraldehyde and osmium tetroxide. Immunoreactive ACTH cells of the rat anterior pituitary can be classified into two groups: typical and atypical ACTH cells. The typical ACTH cells are small stellate ce...

An intrinsic hypoglycaemic activity has been attributed to ACTH. This action of ACTH is essentially mediated by increased insulin secretion. In the present study, the direct action of ACTH on glucose uptake by pigeon hepatocytes has been studied by in vitro technique. The results have shown that ACTH has a direct influence on glucose uptake and this action is not additive in presence of insulin...

Adenylate cyclase responses to pituitary hormones including adrenocorticotropic hormone (ACTH), biogenetic amines, prostaglandin E1 (PGE1), angiotensin II, and glucagon were evaluated in adrenocortical tumors and hyperplastic adrenal tissues, obtained from patients with Cushing's syndrome at surgery, and in normal adrenals. The adenylate cyclase of two normal adrenals was activated only by ACTH...

Opsoclonus-myoclonus syndrome is one of a few corticotropin (ACTH)-responsive central nervous system disorders of childhood. We measured cerebrospinal fluid ACTH and cortisol in 69 children with opsoclonus-myoclonus and 25 age- and sex-matched control subjects to determine endogenous levels and look for hypothesized differential hormonal effects of ACTH and corticosteroid treatment. Cerebrospin...

PURPOSE We reviewed our experience with ACTH for the treatment of intractable generalized seizures other than spasms. METHODS Efficacy and adverse effects of ACTH against intractable generalized seizures other than spasms were retrospectively investigated in 15 patients treated between 1991 and 2003. The median age of the patients at ACTH therapy was 42 months. The targeted type of seizure wa...

High molecular weight forms of immunoreactive ACTH (IR-ACTH) were studied in a human pituitary gland and 4 ectopic ACTH-producing tumors in man. Both the pituitary and tumor extracts contained "big" IR-ACTH, which eluted near the void volume, and a small amount of "intermediate" IR-ACTH components, which eluted between the void volume and 125I-alpha h1-39 ACTH, in addition to "little" ACTH whic...

An adrenocorticotropic hormone (ACTH)-secreting mouse pituitary tumor cell line was used to investigate the structure of the smallest glycoprotein form of ACTH. AtT-20/D16v cells were incubated with a “H-amino acid or “H-sugar; “H-labeled ACTH was prepared by double-antibody immunoprecipitation of culture medium with affinity purified (~(1-24) ACTH antiserum. Immunoprecipitates were solubilized...

  ABSTRACT In order to evaluate time course of changes in serum concentration of thyroid hormones, cortisol and ACTH in patients exposed to chemical weapons containing sulfur mustard, we measured serum concentrations of hormones on the first, third and fifth week following injury in 13 soldiers and compared them to the results obtained from 34 control men. Free T4 and T3 indices were decrease...