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International Journal of Medicinal Mushrooms
IF: 1.423 5-Year IF: 1.525 SJR: 0.433 SNIP: 0.661 CiteScore™: 1.38

ISSN Print: 1521-9437
ISSN Online: 1940-4344

International Journal of Medicinal Mushrooms

DOI: 10.1615/IntJMedMushr.v15.i1.40
pages 29-38

Aqueous Extract from a Chaga Medicinal Mushroom, Inonotus obliquus (Higher Basidiomyetes), Prevents Herpes Simplex Virus Entry Through Inhibition of Viral-Induced Membrane Fusion

Hong-hui Pan
Guangdong Institute of Microbiology; Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application; Guangdong Open Laboratory of Applied Microbiology; State Key Laboratory of Applied Microbiology, South China, Guangzhou, China
Xiong-tao Yu
Guangdong Institute of Microbiology; Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application; Guangdong Open Laboratory of Applied Microbiology; State Key Laboratory of Applied Microbiology, South China, Guangzhou, China
Ting Li
State Key Laboratory of Respiratory Diseases, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
Hong-ling Wu
State Key Laboratory of Respiratory Diseases, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
Chun-wei Jiao
Guangdong Yuewei Edible Fungi Technology Co. Ltd, Guangzhou, China
Mian-hua Cai
Guangdong Yuewei Edible Fungi Technology Co. Ltd, Guangzhou, China
Xiang-min Li
Guangdong Institute of Microbiology; Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application; Guangdong Open Laboratory of Applied Microbiology; State Key Laboratory of Applied Microbiology, South China, Guangzhou, China
Yizhen Xie
Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangzhou, China; Yuewei Edible Fungi Technology Co. Ltd., Guangzhou, China
Yi Wang
State Key Laboratory of Respiratory Diseases, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences; South China United Vaccine Institute
Tao Peng
State Key Laboratory of Respiratory Diseases, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences; South China United Vaccine Institute

ABSTRACT

Chaga medicinal mushroom, Inonotus obliquus, a popular prescription in traditional medicine in Europe and Asia, was used to reduce inflammation in the nasopharynx and to facilitate breathing. The aqueous extract from I. obliquus (AEIO) exhibited marked decrease in herpes simplex virus (HSV) infection (the 50% inhibitory concentration was 3.82 μg/mL in the plaque reduction assay and 12.29 μg/mL in the HSV-1/blue assay) as well as safety in Vero cells (the 50% cellular cytotoxicity was > 1 mg/mL, and selection index was > 80). Using a time course assay, effective stage analysis, and fusion inhibition assay, the mechanism of anti-HSV activity was found against the early stage of viral infection through inhibition of viral-induced membrane fusion. Therefore, AEIO could effectively prevent HSV-1 entry by acting on viral glycoproteins, leading to the prevention of membrane fusion, which is different from nucleoside analog antiherpetics.


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