Genome-wide CRISPR/Cas9 Screen Identifies Host Factors Essential for Influenza Virus Replication

Overview

Journal Cell Rep

Publisher Cell Press

Specialties Biology
Cell Biology
Molecular Biology

Date 2018 Apr 12

PMID 29642015

Citations 143

Authors

Julianna Han

Jasmine T Perez

Cindy Chen

Yan Li

Asiel Benitez

Matheswaran Kandasamy

Yoontae Lee

Jorge Andrade

Benjamin tenOever

Balaji Manicassamy

Affiliations

Soon will be listed here.

Abstract

The emergence of influenza A viruses (IAVs) from zoonotic reservoirs poses a great threat to human health. As seasonal vaccines are ineffective against zoonotic strains, and newly transmitted viruses can quickly acquire drug resistance, there remains a need for host-directed therapeutics against IAVs. Here, we performed a genome-scale CRISPR/Cas9 knockout screen in human lung epithelial cells with a human isolate of an avian H5N1 strain. Several genes involved in sialic acid biosynthesis and related glycosylation pathways were highly enriched post-H5N1 selection, including SLC35A1, a sialic acid transporter essential for IAV receptor expression and thus viral entry. Importantly, we have identified capicua (CIC) as a negative regulator of cell-intrinsic immunity, as loss of CIC resulted in heightened antiviral responses and restricted replication of multiple viruses. Therefore, our study demonstrates that the CRISPR/Cas9 system can be utilized for the discovery of host factors critical for the replication of intracellular pathogens.

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