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2250327 
Technical Report 
Cyclic AMP as a mediator of the relaxing action of papaverine, nitroglycerine, diazoxide and hydralazine in intestinal and vascular smooth muscle 
Andersson, R 
1973 
Yes 
Acta Pharmacologica et Toxicologica
ISSN: 0001-6683 
IPA/74/121082 
Toxicol 
REF 33 
321-336 
eng 
IPA COPYRIGHT: ASHP The role of cyclic AMP in mediating in drug-induced smooth muscle relaxation and vasodilation is discussed. Relaxation of rabbit colon muscle, by papaverine and nitroglycerin, and bovine mesenteric artery, by diazoxide and hydralazine, correlated well with an increased muscle content of cyclic AMP and decreased ATP content of the respective sections. These actions were found to be calcium dependent and involved inhibition of phosphodiesterase activity in calcium-binding microsomal fractions like mitochondria.