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  • Title: Regulation of cyclic AMP and cyclic GMP levels by adrenocorticotropic hormone in cultured neurons.
    Author: Anglard P, Zwiller J, Vincendon G, Louis JC.
    Journal: Biochem Biophys Res Commun; 1985 Nov 27; 133(1):286-92. PubMed ID: 3000376.
    Abstract:
    The effect of adrenocorticotropic hormone (ACTH) on the intracellular concentration of cyclic nucleotides was studied in cultures of neurons from embryonic chick cerebral hemispheres. Incubation of neurons with ACTH(1-24) in the presence of phosphodiesterase inhibitor isobutylmethylxanthine resulted in a sustained increase in cyclic AMP while rise in cyclic GMP level was transient. The values obtained for half-maximal stimulation were 0.5 microM and 0.03 nM for cyclic AMP and cyclic GMP respectively. Concomitantly, ACTH(1-24) stimulated guanylate cyclase activity (half-maximal stimulation at 0.02 nM). These results suggest the existence of two distinct populations of ACTH receptors in neurons and provide the first evidence that cyclic GMP does mediate the action of ACTH in neurons.
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