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Journal of Chinese Pharmaceutical Sciences ›› 2021, Vol. 30 ›› Issue (7): 570-577.DOI: 10.5246/jcps.2021.07.045

• Original articles • Previous Articles     Next Articles

Isolation of endophytic fungi with anti-inflammatory effect in vitro from Zanthoxylum armatum

Aihong Zhao1,#, Tianxia Wang1,#, Xiaoyan Liu2, Weihong Zhao1, Jianping Ma1, Xiuwei Yang2, Tao Guo3,*(), Youbo Zhang2,*()   

  1. 1 Key Laboratory of Herbal-Tebitan Drug Screening and Deep Processing of Gansu Province, Lanzhou University of Technology, Lanzhou 730050, China
    2 State Key Laboratory of Natural and Biomimetic Drugs and Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
    3 School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, China
  • Received:2020-12-15 Revised:2021-02-10 Accepted:2021-02-16 Online:2021-07-27 Published:2021-07-27
  • Contact: Tao Guo, Youbo Zhang
  • About author:
    # These authors contributed equally to this work.

Abstract:

Endophytic fungus is a rich source of bioactive metabolites with multiple activities. In the present study, eight endophytic fungal strains (Z-1 to Z-8) from Zanthoxylum armatum DC. were isolated and identified, and the anti-inflammatory effect of their extracts was evaluated in vitro. The results showed that four endophytic fungal extracts (Fusarium oxysporum Schlecht. (Z-1), Alternaria arborescens E.G Simmons (Z-3), Mucor fragilis Bainier (Z-4) and Aspergillus terreus Thom (Z-6)) displayed good activities in inhibition of excessive production of nitric oxide in lipopolysaccharide-activated mouse macrophage RAW264.7 cells. Among them, the extracts of Fusarium oxysporum Schlecht showed the maximum inhibition activity with a half maximal inhibitory concentration of 174.0 μg/mL. The underlying mechanism of the anti-inflammatory effect of Fusarium oxysporum Schlecht extract was associated with its inhibition on the release of several inflammatory factors. The mRNA expression of interleukin 1β, interleukin 6, inducible nitric oxide synthase in lipopolysaccharide-activated mouse macrophage RAW264.7 cells were all inhibited by Z-1 extract detected by real-time polymerase chain reaction. In summary, several endophytic fungal from Zanthoxylum armatum have good anti-inflammatory activity and Fusarium oxysporum Schlecht possesses a promising potential to be developed to a novel anti-inflammatory agent.

Key words: Endophytic fungi, Zanthoxylum armatum, Anti-inflammation, Real-time polymerase chain reaction

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