Journal
JOURNAL OF ANTIBIOTICS
Volume 67, Issue 3, Pages 253-260Publisher
JAPAN ANTIBIOTICS RESEARCH ASSOC
DOI: 10.1038/ja.2013.129
Keywords
antitrypanosomal activity; Lechevalieria aerocolonigenes; mangromicins; mangrove sediment; physicochemical screening
Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan
- institute for Fermentation (IFO), Osaka, Japan
- Grants-in-Aid for Scientific Research [26350969] Funding Source: KAKEN
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Two new cyclopentadecane antibiotics, named mangromicins A and B, were separated out from the culture broth of Lechevalieria aerocolonigenes K10-0216 by Diaion HP-20, silica gel and ODS column chromatography, and were finally purified by HPLC. The chemical structures of the two novel compounds were elucidated by instrumental analyses, including various NMR, MS and X-ray crystallography. Mangromicins A and B consist of cyclopentadecane skeletons with a tetrahydrofuran unit and a 5,6-dihydro-4-hydroxy-2-pyrone moiety. Mangromicins A and B showed in vitro antitrypanosomal activity with IC50 values of 2.4 and 43.4 mu g ml(-1), respectively. The IC50 values of both compounds were lower than those of cytotoxicity against MRC-5 human fetal lung fibroblast cells.
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