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. WaldeckRamesh Gupta, Chaoping Li, Kenneth J. Breslauer, Arthur P. Grollman, Thomas A. Rosenquist

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageAmerican English
Article number199322
JournalVirus Research
Volume341
DOIs
StatePublished - Mar 2024

ASJC Scopus subject areas

  • Virology
  • Infectious Diseases
  • Cancer Research

Keywords

  • Antiviral
  • Coronoviruses
  • Dehydroemetine
  • Emetine
  • SARS-CoV-2

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