Potent Tetracyclic Guanine Inhibitors of PDE1 and PDE5 Cyclic Guanosine Monophosphate Phosphodiesterases with Oral Antihypertensive Activity
作者:Ho-Sam Ahn、Ana Bercovici、George Boykow、Alan Bronnenkant、Samuel Chackalamannil、Jason Chow、Renee Cleven、John Cook、Michael Czarniecki、Carol Domalski、Ahmad Fawzi、Michael Green、Asli Gündes、Ginny Ho、Malvina Laudicina、Neil Lindo、Ke Ma、Mahua Manna、Brian McKittrick、Bita Mirzai、Terry Nechuta、Bernard Neustadt、Chester Puchalski、Kathryn Pula、Lisa Silverman、Elizabeth Smith、Andrew Stamford、Richard P. Tedesco、Hsingan Tsai、Deen Tulshian、Henry Vaccaro、Robert W. Watkins、Xiaoyu Weng、Joseph T. Witkowski、Yan Xia、Hongtao Zhang
DOI:10.1021/jm9608467
日期:1997.7.1
Tetracyclic guanines have been shown to be potent and selective inhibitors of the cGMP-hydrolyzing enzymes PDE1 and PDE5. In general, these compounds are inactive or only weakly active as inhibitors of PDE3, which is a major isozyme involved in cAMP hydrolysis. Structure-activity relationships are developed at N-1, C-2, N-3, and N-5 on the core nucleus. Compound 31, with an IC50 of 70 pM, is the most potent inhibitor of PDE1, while 50, with an IC50 of 4 nM, is the most potent inhibitor of PDE5. Compounds 20, 22, 30, and 50 are potent dual inhibitors with IC50 values below 30 nM for both PDE1 and PDE5. Compounds 12, 20, and 28 reduced blood pressure by more than 45 mmHg when administered orally at 10 mg/kg to the spontaneously hypertensive rat (SHR).