Newly synthesized bis-benzimidazole derivatives exerting anti-tumor activity through induction of apoptosis and autophagy
摘要:
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.
Practical and Efficient Synthesis of 4,4′-Dihydroxy-3,3′-dinitrodiphenyl Ether and 1,3-<i>bis</i>(4-Hydroxy-3-nitrophenoxy)benzene in Aqueous Alkaline Medium
3′-dinitrodiphenyl ether (4) and 1,3-bis(4-hydroxy-3-nitrophenoxy) benzene (9) are valuable precursors of 3,3′-diamino-4,4′-dihydroxydiphenyl ether1 (5) and 1,3-bis(3-amino-4-hydroxyphenoxy)benzene2 (10) respectively. The latter two compounds are interesting because of their amphoteric properties in acid-base behavior3 and as precursors of symmetrical bisphenolic Mannich derivatives of biological interest
Photoresist compositions and methods are provided for preparing photoresist films that are stable and impermeable to a broad range of organic solvents. Photoresist films provided herein may be photopatterned by selectively applying light, and may be stripped from a surface using unreactive agents. Photopatterned films may be used, for example, to selectively direct organic reagents to a solid support for the purpose of performing regionally selective solid-phase chemical synthesis with micron-scale resolution.
A new series of bis-benzimidazole derivatives were designed and synthesized. In vitro cytotoxicity evaluation showed that these compounds exhibited high activity against the selected tumor cells. Among them, compound 9 owned the best potential, its IC50 values being 5.95 mu mol/L (mononuclear tumor cell line (U937)) and 5.58 mu mol/L (cervical cancer cell (HeLa)). Fluorescence and UV-vis studies showed that compound 9 could bind into the minor groove of DNA. (C) 2014 Ming-Li Yang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.