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Bioactive components of endophytic fungi from two Hainan mangrove plants(PDF)

Journal of Shenzhen University Science and Engineering[ISSN:1000-2618/CN:44-1401/N]

2022 Vol.39 No.3(237-362)
Research Field:


Bioactive components of endophytic fungi from two Hainan mangrove plants
CHEN Biting12WU Weicheng2ZHOU Dongdong1DENG Xiaolin1ZHANG Shiqing2YUAN Jingzhe2 XU Jing1and GUO Zhikai23
1) School of Chemical Engineering and Technology, Hainan University, Haikou 570228, Hainan Province, P. R. China
2) Hainan Key Laboratory of Tropical Microbe Resources, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, Hainan Province, P. R. China
3) Hainan Key Laboratory of Conservation and Utilization of Tropical Agricultural Bioresources, Hainan Institute of Tropical Agricultural Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, Hainan Province, P. R. China
marine chemistry natural products mangrove endophytic fungus secondary metabolites benzofuranone-type natural compound cerebroside-type natural product immunosuppressive activity
Mangrove endophytic fungi are one of the important sources for discovering natural drug leads. In order to obtain natural compounds with novel structures, the metabolites of two mangrove endophytic fungi Phomopsis sp. DHS11 and Aspergillus fumigatus JRJ111048 were studied. As a result, nine compounds (1-9) were isolated from their fermentation extract by comprehensive silica gel, reverse phase silica gel, Sephadex LH20 column chromatography and high performance liquid chromatography (HPLC). The structures of these compounds were identified as norpestaphthalide C (1), norpestaphthalide A (2-a), norpestaphthalide B (2-b), 7-hydroxy-3-(2-hydroxy-propyl)-5-methyl-isochromen-1-one (3), alternaroside B (4), cytochalasin B (5), cerevisterol (6), 5-hydroxymethyl-furaldehyde (7), N-(4-hydroxyphenethyl) acetamide (8), 3,5-dihydroxybenzoic acid (9) by using high resolution electrospray mass spectrometry (HRESIMS), nuclear magnetic resonance spectroscopy (NMR), optical rotation, ultraviolet, infrared spectroscopy techniques and comparing with reported data. Among them, compound 1 was a new benzofuranone-type natural compound discovered for the first time, and the compound 4 was a cerebroside-type natural product reported for the first time from Phomopsis sp. The immunosuppressive activity, antitumor activity and anti-Alzheimer’s activity of compounds 1-9 were evaluated. The result showed that compound 5 displayed good immunosuppressive activity. The research results provide new clues for the in-depth exploration of new bioactive substances in mangrove endophytes.


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