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Use of Viral Entry Assays and Molecular Docking Analysis for the Identification of Antiviral Candidates against Coxsackievirus A16
06:03

Use of Viral Entry Assays and Molecular Docking Analysis for the Identification of Antiviral Candidates against Coxsackievirus A16

Published on: July 15, 2019

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Small molecules targeting coxsackievirus A16 capsid inactivate viral particles and prevent viral binding

Chien-Ju Lin1, Ching-Hsuan Liu2,3, Jonathan Y Wang4

  • 1School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan.

Emerging Microbes & Infections
|September 27, 2018
PubMed

Insights

Chebulagic acid and punicalagin disrupt Coxsackievirus A16 infection by blocking viral entry. These natural tannins show promise as antiviral candidates for hand, foot, and mouth disease.

Area of Science:

  • Virology
  • Natural Product Chemistry
  • Drug Discovery

Background:

  • Coxsackievirus A16 (CVA16) causes hand, foot, and mouth disease (HFMD) in children, with potential for severe outcomes.
  • Current lack of specific antivirals and vaccines necessitates novel therapeutic strategies against CVA16.

Purpose of the Study:

  • To identify small molecules that inhibit CVA16 infection.
  • To investigate the antiviral potential of tannins against CVA16.

Main Methods:

  • Screening of natural compounds for CVA16 antiviral activity.
  • Cell-based assays to assess viral infectivity and cytotoxicity.
  • Molecular docking to predict binding interactions with the CVA16 capsid.

Main Results:

  • Chebulagic acid (CHLA) and punicalagin (PUG) significantly reduced CVA16 infectivity at micromolar concentrations.
  • CHLA and PUG demonstrated no apparent cytotoxicity in human rhabdomyosarcoma cells.
  • Mechanistic studies indicated inhibition of viral entry, including particle inactivation and binding inhibition.
  • Molecular docking identified the viral capsid's fivefold axis canyon as a target region.

Conclusions:

  • CHLA and PUG are effective antagonists of CVA16 entry.
  • These tannins represent promising candidates for developing new treatments against CVA16 infections.

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