Induction of Innate Immune Response by TLR3 Agonist Protects Mice against SARS-CoV-2 Infection.
Viruses
; 14(2)2022 01 19.
Article
in English
| MEDLINE | ID: covidwho-1625815
ABSTRACT
SARS-CoV-2, a member of the coronavirus family, is the causative agent of the COVID-19 pandemic. Currently, there is still an urgent need in developing an efficient therapeutic intervention. In this study, we aimed at evaluating the therapeutic effect of a single intranasal treatment of the TLR3/MDA5 synthetic agonist Poly(IC) against a lethal dose of SARS-CoV-2 in K18-hACE2 transgenic mice. We demonstrate here that early Poly(IC) treatment acts synergistically with SARS-CoV-2 to induce an intense, immediate and transient upregulation of innate immunity-related genes in lungs. This effect is accompanied by viral load reduction, lung and brain cytokine storms prevention and increased levels of macrophages and NK cells, resulting in 83% mice survival, concomitantly with long-term immunization. Thus, priming the lung innate immunity by Poly(IC) or alike may provide an immediate, efficient and safe protective measure against SARS-CoV-2 infection.
Keywords
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Poly I-C
/
Toll-Like Receptor 3
/
SARS-CoV-2
/
COVID-19
/
Immunity, Innate
Type of study:
Experimental Studies
/
Prognostic study
Limits:
Animals
/
Female
/
Humans
Language:
English
Year:
2022
Document Type:
Article
Affiliation country:
V14020189
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