Abstract
Four new alkaloids, including two new meleagrin analogs, meleagrin D (1) and E (2), and two new diketopiperazines, roquefortine H (3) and I (4), were isolated from a deep ocean sediment-derived fungus Penicillium sp. Meleagrin D (1) and E (2) possess unprecedented acetate–mevalonate-derived side chains on the imidazole moiety. These new meleagrins showed weak cytotoxicity against the A-549 cell line, whereas meleagrin B (5) and meleagrin (6), which were isolated previously from the same strain, induced HL-60 cell apoptosis or arrested the cell cycle through G2/M phase, respectively. The results indicate that the distinct substitutions on the imidazole ring significantly influence the cytotoxicity of the meleagrin alkaloids.
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This work was funded by the Chinese Ocean Mineral Resource R & D Association (DY105-2-04).
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Du, L., Feng, T., Zhao, B. et al. Alkaloids from a deep ocean sediment-derived fungus Penicillium sp. and their antitumor activities. J Antibiot 63, 165–170 (2010). https://doi.org/10.1038/ja.2010.11
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DOI: https://doi.org/10.1038/ja.2010.11
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