NATURAL PRODUCT RESEARCH AND DEVELOPMENT ›› 2021, Vol. 33 ›› Issue (1): 48-56.doi: 10.16333/j.1001-6880.2021.1.007

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Study on the secondary metabolites of polar region-derived fungus Geomyces pannorum SA3-2-YM

ZHOU Xiao-yi1,MA Gang-hua1,CHEN Jia-ying1,LI Yi-ming1,LIU Xiao-yu2*,ZHANG Liu-qiang1*   

  1. 1School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; 2Department of Marine Biomedicine and Polar Medicine, Naval Specialty Medical Center, Shanghai 200433, China
  • Online:2021-01-28 Published:2021-01-28

Abstract:

By means of various kinds of column chromatography and semi-preparative high performance liquid chromatography (SP-HPLC), thirteen compounds were obtained from the fermentation of polar region-derived fungus Geomyces pannorum (SA3-2-YM).Their structures were identified as cyclo-(L-Trp-L-Pro)(1),cyclo-(L-Trp-L-Tyr)(2),cyclo-(Gly-L-Trp)(3),cyclo-(L-Trp-L-Phe)(4),cyclo-(L-Trp-L-Ser)(5),cyclo-(L-Tyr-L-Pro)(6),cyclo-(L-Trp-L-Ile)(7),cyclo-(D-Ala-D-Trp)(8),ergosterol(9),(22E)-5α,8α-epidioxyergosta-6,22-dien-3β-ol(10),anicequol(11),indazole(12),p-hydroxybenzaldehyde(13) on the basis of NMR and MS spectroscopic data.Compounds 1-9,11-13 were isolated from the genus Geomyces for the first time.The antimicrobial activities showed that compound 9 showed weak antibacterial activities against Escherichia coli,Staphylococcus aureus and Bacillus subtilis with minimum inhibitory concentration (MIC) value of 90 μg/mL,respectively.The cytotoxic activities against four tumor cell lines of 13 compounds were evaluated by cell counting kit-8 (CCK-8) assay,compounds 1-13 showed different degrees of inhibitory activities against HeLa,HepG2,MCF-7 and SMMC-7721.Among them,the inhibition rates of cyclodipeptide compound 8 against HeLa and compound 10 containing peroxy group against SMMC-7721 were 62.28% and 68.13%,respectively.

Key words: polar region-derived fungus, Geomyces, secondary metabolites, cyclic dipeptides, bioactivities

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