Ifit2 deficiency restricts microglial activation and leukocyte migration following murine coronavirus (m-CoV) CNS infection.
PLoS Pathog
; 16(11): e1009034, 2020 11.
Article
in English
| MEDLINE | ID: covidwho-950851
ABSTRACT
The interferon-induced tetratricopeptide repeat protein (Ifit2) protects mice from lethal neurotropic viruses. Neurotropic coronavirus MHV-RSA59 infection of Ifit2-/- mice caused pronounced morbidity and mortality accompanied by rampant virus replication and spread throughout the brain. In spite of the higher virus load, induction of many cytokines and chemokines in the brains of infected Ifit2-/- mice were similar to that in wild-type mice. In contrast, infected Ifit2-/- mice revealed significantly impaired microglial activation as well as reduced recruitment of NK1.1 T cells and CD4 T cells to the brain, possibly contributing to the lack of viral clearance. These two deficiencies were associated with a lower level of microglial expression of CX3CR1, the receptor of the CX3CL1 (Fractalkine) chemokine, which plays a critical role in both microglial activation and leukocyte recruitment. The above results uncovered a new potential role of an interferon-induced protein in immune protection.
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Virus Replication
/
Cell Movement
/
RNA-Binding Proteins
/
Coronavirus Infections
/
Murine hepatitis virus
/
Apoptosis Regulatory Proteins
/
Leukocytes
Type of study:
Prognostic study
Limits:
Animals
Language:
English
Journal:
PLoS Pathog
Year:
2020
Document Type:
Article
Affiliation country:
Journal.ppat.1009034
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