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Mar. Drugs 2015, 13(11), 7040-7054; doi:10.3390/md13117040

Characterization of a Newly Isolated Marine Fungus Aspergillus dimorphicus for Optimized Production of the Anti-Tumor Agent Wentilactones

1
Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China
2
College of Earth Science, University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing 100049, China
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Peer B. Jacobson
Received: 27 September 2015 / Accepted: 13 November 2015 / Published: 19 November 2015
View Full-Text   |   Download PDF [1738 KB, uploaded 19 November 2015]   |  

Abstract

The potential anti-tumor agent wentilactones were produced by a newly isolated marine fungus Aspergillus dimorphicus. This fungus was derived from deep-sea sediment and identified by polyphasic approach, combining phenotypic, molecular, and extrolite profiles. However, wentilactone production was detected only under static cultures with very low yields. In order to improve wentilactone production, culture conditions were optimized using the response surface methodology. Under the optimal static fermentation conditions, the experimental values were closely consistent with the prediction model. The yields of wentilactone A and B were increased about 11-fold to 13.4 and 6.5 mg/L, respectively. The result was further verified by fermentation scale-up for wentilactone production. Moreover, some small-molecule elicitors were found to have capacity of stimulating wentilactone production. To our knowledge, this is first report of optimized production of tetranorlabdane diterpenoids by a deep-sea derived marine fungus. The present study might be valuable for efficient production of wentilactones and fundamental investigation of the anti-tumor mechanism of norditerpenoids. View Full-Text
Keywords: Aspergillus dimorphicus; anti-tumor agent; wentilactones; optimization Aspergillus dimorphicus; anti-tumor agent; wentilactones; optimization
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Xu, R.; Xu, G.-M.; Li, X.-M.; Li, C.-S.; Wang, B.-G. Characterization of a Newly Isolated Marine Fungus Aspergillus dimorphicus for Optimized Production of the Anti-Tumor Agent Wentilactones. Mar. Drugs 2015, 13, 7040-7054.

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