Covid-19 virus blocks innate immunity to cause infection: Study

Prashasti Awasthi Updated - January 22, 2021 at 03:19 PM.

The study was published in the US-based Journal of Interferon & Cytokine Research

A healthcare worker uses a pipette to process Covid-19 test samples at the SpiceHealth Genome Sequencing Laboratory set up at the Indira Gandhi International Airport in New Delhi, India, on Thursday, Jan. 14, 2021. SpiceHealth, founded by the promoters of low-cost carrier SpiceJet Ltd., have set up the lab to receive all positive Covid-19 samples from international travellers that arrive at the airport in order to identify and contain any new mutant variants of the virus. Photographer T. Narayan/Bloomberg

A new study has found that Covid-19 blocks the processes of innate immune activation that normally directs the production and/or signaling of Type I interferon (IFN-I) by the infected cell and tissues.

IFN-I is a key component of host innate immunity that is responsible for eliminating the virus at the early stage of infection.

The study, published in the

Journal of Interferon & Cytokine Research (JICR), revealed that by suppressing innate immunity, the virus replicates and spreads in the body unchecked.

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“SARS-CoV-2 utilises various approaches to evade host IFN-I response, including suppression of IFN-I production and IFN-I signaling,” said Hongjie Xia and Pei-Yong Shi, University of Texas Medical Branch at Galveston.

He added: “Viruses defective in antagonising IFN-I response, in combination with replication-defective mutations, could potentially be developed as live attenuated vaccine candidates.”

Enhancing antviral immunity

“Targetting innate immunity is highly attractive for therapeutic and vaccine strategies aimed at controlling SARS-CoV-2 infection and protecting against Covid-19. By revealing how the virus blocks innate immune programs we can then build approaches to restore these processes and enhance antiviral immunity,” said Michael Gale Jr, Editor-in-Chief of JICR.

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The authors of the study concluded that routine intravenous immunoglobulin therapy may provide some protective effects to patients with primary immunodeficiency.

Published on January 22, 2021 04:45