Receptor binding profile of cyclazosin, a new alpha 1B-adrenoceptor antagonist.
D Giardinà, M Crucianelli, C Melchiorre, C Taddei, R Testa
文献索引:Eur. J. Pharmacol. 287 , 13-16, (1995)
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摘要
The binding profile of cyclazosin, a new prazosin-related alpha 1-adrenoceptor antagonist, at alpha 1-, alpha 2-adrenoceptors, dopamine D2 and 5-HT1A receptors was compared to that of 5-methylurapidil, spiperone, risperidone and other prazosin-related ligands. In addition, cyclazosin was investigated at native and cloned alpha 1-adrenoceptor subtypes. Cyclazosin showed high specificity for alpha 1-adrenoceptors and a 10-15-fold selectivity for alpha 1B (alpha 1b)-adrenoceptors with respect to the alpha 1A (alpha 1a) subtype (pKi values of 9.23-9.57 and 8.18-8.41, respectively). However, it failed to discriminate between cloned alpha 1b and alpha 1d-adrenoceptors (pKi values of 9.23 and 9.28, respectively).
相关化合物
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1996-11-08
[J. Med. Chem. 39 , 4602, (1996)]