Newly synthesized bis-benzimidazole derivatives exerting anti-tumor activity through induction of apoptosis and autophagy
作者:Xiu-Jun Wang、Na-Ying Chu、Qin-He Wang、Chao Liu、Chun-guo Jiang、Xiao-Yu Wang、Takashi Ikejima、Mao-Sheng Cheng
DOI:10.1016/j.bmcl.2012.06.102
日期:2012.10
In this study, a new series of bis-benzimidazole derivatives were designed and synthesized. Most of these new compounds showed significant anti-tumor activity in vitro compared to Hoechst 33258. Among them, the most potent compound 8 had the IC50 values of 0.56 mu M for HL60 (Human promyelocytic leukemia cells) tumor cell line and 0.58 mu M for U937 (Human leukemic monocyte lymphoma cells) tumor cell line. Subsequent toxicity study on human peripheral blood mononuclear cells (PBMC) showed that compound 8 exhibited less toxicity than 5-FU. We also found that apoptosis and autophagy were simultaneously induced by compound 8 in HL60 cells, and inhibition of autophagy by 3-MA decreased compound 8-induced apoptosis, indicating that they acted in synergy to exert tumor cell death. (C) 2012 Elsevier Ltd. All rights reserved.