TY - JOUR
T1 - Mechanisms of antiviral action and toxicities of ipecac alkaloids
T2 - Emetine and dehydroemetine exhibit anti-coronaviral activities at non-cardiotoxic concentrations
AU - Sidorenko, Viktoriya S.
AU - Cohen, Ira
AU - Dorjee, Kunchok
AU - Minetti, Conceição A.
AU - Remeta, David P.
AU - Gao, Junyuan
AU - Potapova, Irina
AU - Wang, Hong Zhan
AU - Hearing, Janet
AU - Yen, Wan Yi
AU - Kim, Hwan Keun
AU - Hashimoto, Keiji
AU - Moriya, Masaaki
AU - Dickman, Kathleen G.
AU - Yin, Xingyu
AU - Garcia-Diaz, Miguel
AU - Chennamshetti, Rajesh
AU - Bonala, Radha
AU - Johnson, Francis
AU - Waldeck, Amanda L.
AU - Gupta, Ramesh
AU - Li, Chaoping
AU - Breslauer, Kenneth J.
AU - Grollman, Arthur P.
AU - Rosenquist, Thomas A.
N1 - Publisher Copyright: © 2024 The Authors
PY - 2024/3
Y1 - 2024/3
N2 - 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.
AB - 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.
KW - Antiviral
KW - Coronoviruses
KW - Dehydroemetine
KW - Emetine
KW - SARS-CoV-2
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U2 - 10.1016/j.virusres.2024.199322
DO - 10.1016/j.virusres.2024.199322
M3 - Article
C2 - 38228190
SN - 0168-1702
VL - 341
JO - Virus Research
JF - Virus Research
M1 - 199322
ER -