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- W1834533906 endingPage "532" @default.
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- W1834533906 abstract "The effects on cellular proliferation and Ca2+ mobilization of analogues of cyclic AMP (cAMP) and cyclic GMP (cGMP) and of agents that elevate the intracellular concentrations of cyclic nucleotides were compared in closely similar preparations of first-passage rabbit aortic vascular smooth-muscle cells. Proliferation induced by foetal-bovine serum was inhibited by 78% by 1 mM-8-bromo cAMP and by 42% by 1 mM-8-bromo cGMP. In the presence of 100 microM-isobutylmethylxanthine, 100 microM-forskolin increased intracellular cAMP concentration 5-fold and inhibited proliferation by 87%, but did not affect cGMP concentration or cell viability (ATP concentration). Similarly in the presence of 100 microM-isobutylmethylxanthine, 1 mM-SIN-1 (3-morpholinosydnonimine) elevated cGMP concentration 4-fold and inhibited proliferation by 48%, but did not affect cAMP or ATP concentration. Isobutylmethylxanthine (1 mM) elevated cAMP concentration by 3-fold and cGMP concentration by 20-fold and inhibited proliferation by 81%. Concentrations of 8-bromo cAMP, 8-bromo cGMP, forskolin or SIN-1 that inhibited proliferation did not affect the elevation of intracellular free Ca2+ concentration caused by 2% (v/v) foetal-bovine serum, 100 nM-5-hydroxytryptamine or 10 nM-angiotensin II. The results demonstrate that elevation of intracellular cAMP and cGMP concentrations both independently inhibit vascular smooth-muscle cell proliferation, but these effects on proliferation are not mediated by inhibition of Ca2+ mobilization." @default.
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- W1834533906 date "1992-12-01" @default.
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- W1834533906 title "Inhibition of proliferation, but not of Ca2+ mobilization, by cyclic AMP and GMP in rabbit aortic smooth-muscle cells" @default.
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- W1834533906 doi "https://doi.org/10.1042/bj2880527" @default.
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