Discovery and Extensive <i>in Vitro</i> Evaluations of NK-HDAC-1: A Chiral Histone Deacetylase Inhibitor as a Promising Lead
作者:Jingli Hou、Zhonghua Li、Qinghong Fang、Congran Feng、Hanwen Zhang、Weikang Guo、Huihui Wang、Guoxian Gu、Yinping Tian、Pi Liu、Ruihua Liu、Jianping Lin、Yi-kang Shi、Zheng Yin、Jie Shen、Peng George Wang
DOI:10.1021/jm201496g
日期:2012.4.12
Herein, further SAR studies of lead compound NSC746457 (Shen, J.; Woodward, R.; Kedenburg, J. P.; Liu, X. W.; Chen, M.; Fang, L. Y.; Sun; D. X.; Wang. P. G. J. Med. Chem. 2008, SI, 7417-7427) were performed, including the replacement of the trans-styryl moiety with a 2-substituted benzo-hetero aromatic ring and the introduction of a substituent onto the central methylene carbon. A promising chiral lead, S-(E)-3-(1-(1-(benzo[d]oxazol-2-yl)-2-methylpropyl)-1H-1,2,3-triazol-4-yl)-N-hydroxyacrylamide (12, NK-HDAC-1), was discovered and showed about 1 order of magnitude more potency than SAHA in both enzymatic and cellular assays. For the in vitro safety tests, NK-HDAC-1 was far less toxic to nontransformed cells than tumor cells and showed no significant inhibition activity against CYP-3A4. The pharmaceutical properties (LogD, solubility, liver micrsomal stability (t1/2), plasma stability (t1/2), and apparent permeability) strongly suggested that NK-HDAC-1 might be superior to SAHA in bioavailability and in vivo half-life.