Abstract
A new aaptamine class alkaloid, designated 2-methoxy-3-oxoaaptamine (1), together with seven known aaptamines (2–8) were isolated from a marine sponge of Aaptos sp. as anti-mycobacterial substances against active and dormant bacilli. The chemical structure of 1 was determined on the basis of spectroscopic analysis. Compound 1 was anti-mycobacterial against Mycobacterium smegmatis in both active growing and dormancy-inducing hypoxic conditions with a minimum inhibitory concentration (MIC) of 6.25 μg/ml, and compounds 2, 5, 6, and 7 showed anti-mycobacterial activities under hypoxic condition selectively, with MIC values of 1.5–6.25 μg/ml.
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This study was financially supported by the Hoansha Foundation and Grant-in-Aid for scientific research from the Ministry of Education, Culture, Sports, Science, and Technology of Japan.
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Arai, M., Han, C., Yamano, Y. et al. Aaptamines, marine spongean alkaloids, as anti-dormant mycobacterial substances. J Nat Med 68, 372–376 (2014). https://doi.org/10.1007/s11418-013-0811-y
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DOI: https://doi.org/10.1007/s11418-013-0811-y