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XB-ART-29085
Proc Natl Acad Sci U S A 1985 Sep 01;8217:6001-5.
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Acetylcholine and phorbol esters inhibit potassium currents evoked by adenosine and cAMP in Xenopus oocytes.

Dascal N , Lotan I , Gillo B , Lester HA , Lass Y .


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In Xenopus laevis oocytes, adenosine and other purinergic agonists induce a K+-conductance increase that is fully mimicked by intracellular application of cAMP. Acetylcholine suppresses the K+-conductance increase caused by adenosine, by the phosphodiesterase inhibitor 3-isobutyl-1-methylxanthine, or by intracellular injection of cAMP. This effect of acetylcholine is not mimicked by intracellular injection of Ca2+ or of the Ca-mobilizing agent inositol 1,4,5-trisphosphate. However, adenosine and cAMP responses are inhibited by 4 beta-phorbol 12,13-dibutyrate and 4 beta-phorbol 12-myristate 13-acetate. These results suggest that, in Xenopus oocytes, the muscarinic inhibition of purinergic and cAMP responses is mediated through the activation of the phospholipid-dependent, Ca-activated protein kinase (protein kinase C).

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Genes referenced: camp

References [+] :
Beavo, Identification and properties of cyclic nucleotide phosphodiesterases. 1982, Pubmed