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- W131442372 abstract "The cAMP enhancing-vasodilator isoproterenol has been shown previously to decrease endothelial permeability in vitro. This effect may not be unique to cAMP-enhancing agents. The authors have shown that thrombin at a concentration of 2 pM, a level which relaxes aortic vessel strips in association with increased levels of cGMP, reduces endothelial permeability. In this study, the permeability effect of cAMP and cGMP analogues were assessed by measuring the clearance of {sup 125}I-albumin across bovine pulmonary artery endothelial cell monolayers. The experiments were divided into baseline and experimental periods so that each monolayer served as its own control. The cAMP and cGMP analogues, 8-bromo-cAMP (1 mM) and 8-bromo-cGMP (1 mM), decreased clearance form a vehicle control value of 1.3{+-}0.2 (mean {+-}SD of experimental/baseline clearance, n=15 cell monolayers) to 0.7{+-}0.2 and 1.0{+-}0.2, respectively, although cGMP did not decrease clearance from its own baseline value. Coincubation of these analogues with thrombin (0.1 uM) also decreased the thrombin-induced increase in albumin clearance from 2.2{+-}0.5 to 0.8{+-}0.2 (cAMP) and 1.5{+-}0.2 (cGMP). The data indicate that in vitro both cAMP and cGMP-enhancing vasodilators would reduce endothelial permeability and that cAMP-enhancing agents would be more effective." @default.
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- W131442372 date "1990-02-26" @default.
- W131442372 modified "2023-09-24" @default.
- W131442372 title "Reduction of endothelial permeability in vitro by cAMP and cGMP" @default.
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