期刊
BIOORGANIC & MEDICINAL CHEMISTRY
卷 18, 期 4, 页码 1456-1463出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmc.2010.01.018
关键词
Xanthene; Xanthone; Cytotoxicity; Cancer cells; MCF-7; DU-145; HeLa; SAR; Topoisomerase; DNA binding; Intercalation; Drug design; Molecular modeling
A series of substituted xanthenes was synthesized and screened for activity using DU-145, MCF-7, and HeLa cancer cell growth inhibition assays. The most potent compound, 9g ([N, N-diethyl]-9-hydroxy-9( 3-methoxyphenyl)-9H-xanthene-3-carboxamide), was found to inhibit cancer cell growth with IC50 values ranging from 36 to 50 mu M across all three cancer cell lines. Structure-activity relationship (SAR) data is presented that indicates additional gains in potency may be realized through further derivatization of the compounds (e. g., the incorporation of a 7-fluoro substituent to 9g). Results are also presented that suggest the compounds function through a unique mechanism of action as compared to that of related acridine and xanthone anticancer agents (which have been shown to intercalate into DNA and inhibit topoisomerase II activity). A structural comparison of these compounds suggests the differences in function may be due to the structure of the xanthene heterocycle which adopts a nonplanar conformation about the pyran ring. (C) 2010 Elsevier Ltd. All rights reserved.
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