A novel tamoxifen derivative, ridaifen-F, is a nonpeptidic small-molecule proteasome inhibitor
作者:Makoto Hasegawa、Yukari Yasuda、Makoto Tanaka、Kenya Nakata、Eri Umeda、Yanwen Wang、Chihiro Watanabe、Shoko Uetake、Tatsuki Kunoh、Masafumi Shionyu、Ryuzo Sasaki、Isamu Shiina、Tamio Mizukami
DOI:10.1016/j.ejmech.2013.11.009
日期:2014.1
In a survey of nonpeptide noncovalent inhibitors of the human 20S proteasome, we found that a novel tamoxifen derivative, RID-F (compound 6), inhibits all three protease activities of the proteasome at submicromolar levels. Structure activity relationship studies revealed that a RID-F analog (RID-F-S*4, compound 25) is the smallest derivative compound capable of inhibiting proteasome activity, with a potency similar to that of RID-F. Kinetic analyses of the inhibition mode and competition experiments involving biotin-belactosin A (a proteasome inhibitor) binding indicated that the RID-F derivatives interact with the protease subunits in a different manner. Culturing of human cells with these compounds resulted in accumulation of ubiquitinated proteins and induction of apoptosis. Thus, the RID-F derivatives may be useful lead chemicals for the generation of a new class of proteasome inhibitors. (C) 2013 Elsevier Masson SAS. All rights reserved.