Benzo[<i>c</i>]quinolizin-3-ones: A Novel Class of Potent and Selective Nonsteroidal Inhibitors of Human Steroid 5α-Reductase 1
作者:Antonio Guarna、Fabrizio Machetti、Ernesto G. Occhiato、Dina Scarpi、Alessandra Comerci、Giovanna Danza、Rosa Mancina、Mario Serio、Kimber Hardy
DOI:10.1021/jm000945r
日期:2000.10.1
potency (IC(50) from 7.6 to 20 nM). Compounds 39 and 40, having K(i) values of 5.8+/-1.8 and 2.7+/-0.6 nM, respectively, toward 5alphaR-1 expressed in CHO cells, were also tested toward native 5alphaR-1 in human scalp and 5alphaR-2 in human prostate homogenates, in comparison with finasteride and the known 5alphaR-1-selective inhibitor LY191704, and their mechanism of inhibition was determined. They
报道了一系列新型的,选择性的人5α-还原酶(5alphaR)(EC 1.3.99.5)同工酶抑制剂的合成和生物学评估。抑制剂是4aH-(19-29)或1H-四氢苯并[c]喹诺嗪-3-酮(35-47),分别在位置1、4、5和6为甲基,在位置8为氢,甲基或氯原子。对所有这些化合物进行了针对CHO细胞中表达的5alphaR-1和5alphaR-2的测试(分别为CHO 1827和CHO 1829),产生了1型同工酶的选择性抑制剂,抑制力(IC(50))范围为7.6至9100 nM。通常,在1,2位具有双键的4aH系列抑制剂的活性低于在A环上在4,4a位具有双键的1H系列抑制剂的活性。与位置8的取代基相关的位置4(如化合物39-40和45-47)中甲基的存在确定了最高的抑制能力(IC(50)从7.6至20 nM)。对于在CHO细胞中表达的5alphaR-1,分别具有5.8 +/- 1.8和2.7 +/-