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1

Hubei Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang 443002, China

2

The First College of Clinical Medical Science, China Three Gorges University, Yichang 443002, China





*

Authors to whom correspondence should be addressed.



Academic Editor: Derek J. McPhee

Abstract Seeking a strategy for triggering the cryptic natural product biosynthesis to yield novel compounds in the plant-associated fungus Xylaria sp., the effect of culture conditions on metabolite production was investigated. A shift in the production of five known cytochalasin-type analogues 1–5 to six new α-pyrone derivatives, xylapyrones A–F compounds 6–11, from a solid to a liquid medium was observed. These compounds were identified by analysis of 1D and 2D NMR and HRMS data. Compounds 1–3 showed moderate cytotoxicity against HepG2 and Caski cancer cell lines with IC50 values ranging from 25 to 63 μM and compounds 4–11 were found to be inactive, with IC50 values >100 μM. View Full-Text

Keywords: Xylaria sp.; cryptic natural product; cytochalasin; α-pyrone; xylapyrones; cytotoxicity Xylaria sp.; cryptic natural product; cytochalasin; α-pyrone; xylapyrones; cytotoxicity





Autor: Hongqi Zhang 1, Zhangshuang Deng 1,* , Zhiyong Guo 1, Yan Peng 2, Nianyu Huang 1, Haibo He 1, Xuan Tu 1 and Kun Zou 1,*

Fuente: http://mdpi.com/



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