Virus Research (Mar 2024)

Mechanisms of antiviral action and toxicities of ipecac alkaloids: Emetine and dehydroemetine exhibit anti-coronaviral activities at non-cardiotoxic concentrations

  • Viktoriya S. Sidorenko,
  • Ira Cohen,
  • Kunchok Dorjee,
  • Conceição A. Minetti,
  • David P. Remeta,
  • Junyuan Gao,
  • Irina Potapova,
  • Hong Zhan Wang,
  • Janet Hearing,
  • Wan-Yi Yen,
  • Hwan Keun Kim,
  • Keiji Hashimoto,
  • Masaaki Moriya,
  • Kathleen G. Dickman,
  • Xingyu Yin,
  • Miguel Garcia-Diaz,
  • Rajesh Chennamshetti,
  • Radha Bonala,
  • Francis Johnson,
  • Amanda L. Waldeck,
  • Ramesh Gupta,
  • Chaoping Li,
  • Kenneth J. Breslauer,
  • Arthur P. Grollman,
  • Thomas A. Rosenquist

Journal volume & issue
Vol. 341
p. 199322

Abstract

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The emergence of highly infectious pathogens with their potential for triggering global pandemics necessitate the development of effective treatment strategies, including broad-spectrum antiviral therapies to safeguard human health. This study investigates the antiviral activity of emetine, dehydroemetine (DHE), and congeneric compounds against SARS-CoV-2 and HCoV-OC43, and evaluates their impact on the host cell. Concurrently, we assess the potential cardiotoxicity of these ipecac alkaloids. Significantly, our data reveal that emetine and the (-)-R,S isomer of 2,3-dehydroemetine (designated in this paper as DHE4) reduce viral growth at nanomolar concentrations (i.e., IC50 ∼ 50–100 nM), paralleling those required for inhibition of protein synthesis, while calcium channel blocking activity occurs at elevated concentrations (i.e., IC50 ∼ 40–60 µM). Our findings suggest that the antiviral mechanisms primarily involve disruption of host cell protein synthesis and is demonstrably stereoisomer specific. The prospect of a therapeutic window in which emetine or DHE4 inhibit viral propagation without cardiotoxicity renders these alkaloids viable candidates in strategies worthy of clinical investigation.

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