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- Title
Divergolides T–W with Apoptosis-Inducing Activity from the Mangrove-Derived Actinomycete Streptomyces sp. KFD18.
- Authors
Zhou, Li-Man; Kong, Fan-Dong; Xie, Qing-Yi; Ma, Qing-Yun; Hu, Zhong; Zhao, You-Xing; Luo, Du-Qiang
- Abstract
Four new ansamycins, named divergolides T–W (1–4), along with two known analogs were isolated from the fermentation broth of the mangrove-derived actinomycete Streptomyces sp. KFD18. The structures of the compounds, including the absolute configurations of their stereogenic carbons, were determined by spectroscopic data and single-crystal X-ray diffraction analysis. Compounds 1–4 showed cytotoxic activity against the human gastric cancer cell line SGC-7901, the human leukemic cell line K562, the HeLa cell line, and the human lung carcinoma cell line A549, with 1 being the most active while compounds 5 and 6 were inactive against all the tested cell lines. Compounds 1 and 3 showed very potent and specific cytotoxic activities (IC50 2.8 and 4.7 µM, respectively) against the SGC-7901 cells. Further, the apoptosis-inducing effect of 1 and 3 against SGC-7901 cells was demonstrated by two kinds of staining methods for the first time.
- Subjects
APOPTOSIS; ACTINOMYCETALES; STREPTOMYCES; ANSAMYCINS; STOMACH cancer
- Publication
Marine Drugs, 2019, Vol 17, Issue 4, p219
- ISSN
1660-3397
- Publication type
Article
- DOI
10.3390/md17040219