Frontiers in Microbiology (Feb 2023)

Inhibitory effects of Patchouli alcohol on the early lifecycle stages of influenza A virus

  • Yaohua Fan,
  • Yaohua Fan,
  • Qiong Zhang,
  • Wen Zhang,
  • Yanni Lai,
  • Haishan Long,
  • Huiting Huang,
  • Shaofeng Zhan,
  • Xiaohong Liu,
  • Jielan Lai,
  • Zhongde Zhang,
  • Pan Pan,
  • Ziren Su,
  • Geng Li

DOI
https://doi.org/10.3389/fmicb.2022.938868
Journal volume & issue
Vol. 13

Abstract

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BackgroundThe antiviral activity and underlying mechanism of Patchouli alcohol remain unclear.MethodsThis study evaluated the cytotoxicity, optimal methods for drug administration, anti-influenza A activity of Patchouli alcohol. The antiviral mechanism of Patchouli alcohol was also assessed via qRT-PCR, western blot, hemagglutination inhibiting (HAI) assay, and hemolysis inhibiting assay.ResultsPatchouli alcohol was shown to have low cytotoxicity and its strongest antiviral effect was associated with premixed administration. Patchouli alcohol inhibited virus replication during the early lifecycle stages of influenza A virus infection and specifically prevented expression of the viral proteins, HA and NP. In both the HAI and hemolysis inhibiting assays, Patchouli alcohol was able to block HA2-mediated membrane fusion under low pH conditions. Patchouli alcohol had lower binding energy with HA2 than HA1.ConclusionThese findings suggest that Patchouli alcohol could be a promising membrane fusion inhibitor for the treatment of influenza A infection.

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