期刊
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
卷 498, 期 1, 页码 99-104出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.bbrc.2018.02.205
关键词
Harmine; Anticancer effect; DNA damage response; Autophagy; Apoptosis
资金
- National 111 Project of China [B13038]
- National Institutes of Health [R01163214]
- American Cancer Society [ACS RSG-15-042 DMC]
Harmine and its analogs have long been considered as anticancer agents. In vitro analyses suggested that intercalating DNA or inhibiting topoisomerase might contribute to the cytotoxic effect of this class of compound. However, this idea has not been rigorously tested in intact cells. By synthesizing novel derivatives, here we demonstrate that harmines did not activate the DNA damage response, a cellular signaling commonly induced by agents that intercalate DNA or inhibit topoisomerase. These findings suggest that mechanisms other than DNA intercalating or topoisomerase inhibiting contribute to the toxicity of harmines in vivo. Using a novel N-2-benzyl and N-9-arylated alkyl compound 10f that has good solubility and stability as the model, we show that harmines strongly inhibited the growth of cancer cells originated from breast, lung, bone and pancreas, but not that of normal fibroblasts. We further show that 10f induced apoptosis and inhibited autophagy in a dose and time-dependent manner. An apoptosis inhibitor suppressed 10f-induced cell death. Together, our results reveal previously unidentified insights into the anticancer mechanism of harmines, supporting future development of this compound class in the treatment of human cancers. (C) 2018 Elsevier Inc. All rights reserved.
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