Discovery of a tetrahydroisoquinoline-based HDAC inhibitor with improved plasma stability
作者:Nan Zhou、Yugang Yan、Chunxi Liu、Jinning Hou、Wenfang Xu、Yingjie Zhang
DOI:10.1016/j.bmc.2017.06.039
日期:2017.9
Histone deacetylase inhibitors with desirable pharmacokinetic profiles which can be delivered to solid tumor tissues in large amount might be promising to treat solid tumor effectively. Herein, structural modification of a previously reported tetrahydroisoquinoline-based HDAC inhibitor 1 was carried out to improve its plasma stability for more feasible drug delivery. Among three newly synthesized analogs, the in vitro rat plasma stability of compound 2 (t(1/2) = 630 min) was over 5-fold improved than its parent 1 (t(1/2) = 103 min). In vitro activity evaluation showed that compound 2 and 1 exhibited similar HDACs inhibitory activity, which was validated by western blot analysis and antiproliferative assay. Moreover, compared with 1, compound 2 exhibited comparable, if not higher, in vivo antitumor activity in a human breast carcinoma (MDA-MB-231) xenograft model. (C) 2017 Elsevier Ltd. All rights reserved.