Effect of novel mixed ETA/ETB antagonists on responses to ET-1 in human small muscular pulmonary arteries.


Selective ETA and ETB receptor antagonists do not fully inhibit responses to ET-1 in human small pulmonary arteries. Here, we have compared the influence of the novel mixed ETA/ETB antagonists SB/217242, SB/234551 and SB/209670 on ET-1-mediated vasoconstriction in these vessels. ET-1 was a potent vasoconstrictor (pEC50: 8.14+/-0.05, n=5) and the… (More)


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