Discovery of 1,2,4-thiadiazolidine-3,5-dione analogs that exhibit unusual and selective rapid cell death kinetics against acute myelogenous leukemia cells in culture
作者:Shama Nasim、Monica L. Guzman、Craig T. Jordan、Peter A. Crooks
DOI:10.1016/j.bmcl.2011.06.027
日期:2011.8
4-Benzyl-2-methyl-1,2,4-thiadiazolidine-3,5-dione (TDZD-8) was previously identified as an antileukemic agent exhibiting no evident toxicity toward normal hematopoietic cells. An SAR study has been carried out to examine the effect of varying the C-2 and C-4- substituents on the thiadiazolidinone ring of TDZD-8 on antileukemic activity. These studies resulted in the identification of more druglike analogs that exhibited comparable potency to TDZD-8 in killing acute myelogenous leukemia (AML) cells in culture. Surprisingly, the cell death kinetics induced by several of these novel analogs on MV-411 cells were extremely fast, with commitment to death occurring within 30 min. At a concentration of 10 mu M, 3f (LD50 = 3.5 mu M) completely eradicated cell viability of MV-411 cells within 2 h, while analog 3e (LD50 = 2.0 mu M) decimated cell viability within 30 min at a concentration of 10 mu M and effectively abolished cell viability at 5 mu M within 1-2 h. (C) 2011 Elsevier Ltd. All rights reserved.