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Phoxalone, a novel macrolide from Sorangium cellulosum: structure identification and its anti-tumor bioactivity in
1Department of Pharmaceutical, School of Biotechnology, Southern Yangtze University, Wuxi, Jiangsu 214122, PR China.
Abstract:
A novel macrolide, isolated from the myxobacteria Sorangium cellulosum WXNXJ-C, was identified as 1,7,12,13-tetrahydroxy-14-methoxy-8,10-dimethyl-6-phenyl-5,15-dioxa-bicyclo[9.3.1]pentadecan-4-one, "Phoxalone". It had minimum IC(50) values of 0.24, 6.9, 10.3, 0.98 and 4 microg/ml, respectively, against tumour cell lines: B16, Bel7402, H446, MCF-7, and SGC7901. In addition, it had less cytotoxicity to normal human liver L02 cell lines (286 microg/ml, 24 h). A cytotoxic bioactivity study on H446 cell line in vitro suggested that Phoxalone arrested the mitosis in the G2/M phase.
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