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Title: MAVS mediates a protective immune response in the brain to Rift Valley fever virus

Journal Article · · PLoS Pathogens

Rift Valley fever virus (RVFV) is a highly pathogenic mosquito-borne virus capable of causing hepatitis, encephalitis, blindness, hemorrhagic syndrome, and death in humans and livestock. Upon aerosol infection with RVFV, the brain is a major site of viral replication and tissue damage, yet pathogenesis in this organ has been understudied. Here, we investigated the immune response in the brain of RVFV infected mice. In response to infection, microglia initiated robust transcriptional upregulation of antiviral immune genes, as well as increased levels of activation markers and cytokine secretion that is dependent on mitochondrial antiviral-signaling protein (MAVS) and independent of toll-like receptors 3 and 7. In vivo , Mavs -/- mice displayed enhanced susceptibility to RVFV as determined by increased brain viral burden and higher mortality. Single-cell RNA sequence analysis identified defects in type I interferon and interferon responsive gene expression within microglia in Mavs -/- mice, as well as dysregulated lymphocyte infiltration. The results of this study provide a crucial step towards understanding the precise molecular mechanisms by which RVFV infection is controlled in the brain and will help inform the development of vaccines and antiviral therapies that are effective in preventing encephalitis.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
17-LW-038; 22-ERD-038; AC52-07NA27344
OSTI ID:
2217367
Alternate ID(s):
OSTI ID: 1868569; OSTI ID: 1874547
Report Number(s):
LLNL-JRNL-829758; 10.1371/journal.ppat.1010231
Journal Information:
PLoS Pathogens, Journal Name: PLoS Pathogens Vol. 18 Journal Issue: 5; ISSN 1553-7374
Publisher:
Public Library of Science (PLoS)Copyright Statement
Country of Publication:
United States
Language:
English

References (66)

The risk of Rift Valley fever virus introduction and establishment in the United States and European Union journal January 2013
Innate Immune Sensing of Viruses and Its Consequences for the Central Nervous System journal January 2021
IPS-1 Is Essential for the Control of West Nile Virus Infection and Immunity journal February 2010
Sex- and Development-Dependent Responses of Rat Microglia to Pro- and Anti-inflammatory Stimulation journal November 2018
Perforin and granzymes: function, dysfunction and human pathology journal May 2015
The pathogenesis of Rift Valley fever virus in the mouse model journal November 2010
IFIT1 is an antiviral protein that recognizes 5′-triphosphate RNA journal June 2011
CD4 T Cells, CD8 T Cells, and Monocytes Coordinate To Prevent Rift Valley Fever Virus Encephalitis journal December 2018
Nitric Oxide-Dependent Pathways as Critical Factors in the Consequences and Recovery after Brain Ischemic Hypoxia journal July 2021
STAR: ultrafast universal RNA-seq aligner journal October 2012
Toll-Like Receptor 3 Has a Protective Role against West Nile Virus Infection journal August 2008
Factors Associated with Severe Human Rift Valley Fever in Sangailu, Garissa County, Kenya journal March 2015
IL-27 enhances IL-15/IL-18-mediated activation of human natural killer cells journal July 2019
Rift Valley Fever Epidemic in Saudi Arabia: Epidemiological, Clinical, and Laboratory Characteristics journal October 2003
The brain parenchyma has a type I interferon response that can limit virus spread journal December 2016
OASL1 inhibits translation of the type I interferon–regulating transcription factor IRF7 journal February 2013
Origin, fate and dynamics of macrophages at central nervous system interfaces journal May 2016
Borrelia burgdorferi induces inflammatory mediator production by murine microglia journal September 2002
Neuroinflammation in Parkinson's disease: Its role in neuronal death and implications for therapeutic intervention journal March 2010
featureCounts: an efficient general purpose program for assigning sequence reads to genomic features journal November 2013
A Genome-Wide RNA Interference Screen Identifies a Role for Wnt/β-Catenin Signaling during Rift Valley Fever Virus Infection journal August 2016
MAVS Expressed by Hematopoietic Cells Is Critical for Control of West Nile Virus Infection and Pathogenesis journal August 2016
Association of Symptoms and Severity of Rift Valley Fever with Genetic Polymorphisms in Human Innate Immune Pathways journal March 2015
Innate Immunity in the CNS: Redefining the Relationship between the CNS and Its Environment journal April 2013
Cytokine response in mouse bone marrow derived macrophages after infection with pathogenic and non-pathogenic Rift Valley fever virus journal July 2015
IL-27 stimulates human NK-cell effector functions and primes NK cells for IL-18 responsiveness: Immunomodulation journal December 2014
Comprehensive Integration of Single-Cell Data journal June 2019
Single-Cell RNA Sequencing of Microglia throughout the Mouse Lifespan and in the Injured Brain Reveals Complex Cell-State Changes journal January 2019
Rift Valley Fever Virus Strain MP-12 Enters Mammalian Host Cells via Caveola-Mediated Endocytosis journal September 2012
The natural killer cell response to West Nile virus in young and old individuals with or without a prior history of infection journal February 2017
Single Cell Transcriptome Analysis of Niemann–Pick Disease, Type C1 Cerebella journal July 2020
Type I Interferon Receptor Signaling of Neurons and Astrocytes Regulates Microglia Activation during Viral Encephalitis journal October 2018
Rift Valley Fever Virus Encephalitis Is Associated with an Ineffective Systemic Immune Response and Activated T Cell Infiltration into the CNS in an Immunocompetent Mouse Model journal June 2014
edgeR: a Bioconductor package for differential expression analysis of digital gene expression data journal November 2009
CD8 + T Cells Require Perforin To Clear West Nile Virus from Infected Neurons journal January 2006
Risk Factors for Severe Rift Valley Fever Infection in Kenya, 2007 journal August 2010
CSF1R antagonism limits local restimulation of antiviral CD8+ T cells during viral encephalitis journal January 2019
IRF8 Is a Critical Transcription Factor for Transforming Microglia into a Reactive Phenotype journal April 2012
Microglia influence host defense, disease, and repair following murine coronavirus infection of the central nervous system journal May 2020
Normalization of RNA-seq data using factor analysis of control genes or samples journal August 2014
Toll-like Receptor 7 Mitigates Lethal West Nile Encephalitis via Interleukin 23-Dependent Immune Cell Infiltration and Homing journal February 2009
T cell engagement of cross-presenting microglia protects the brain from a nasal virus infection journal June 2020
Highly Sensitive and Broadly Reactive Quantitative Reverse Transcription-PCR Assay for High-Throughput Detection of Rift Valley Fever Virus journal November 2007
Innate antiviral signalling in the central nervous system journal February 2014
Isolation and culture of adult neurons and neurospheres journal June 2007
RNA Helicase Signaling Is Critical for Type I Interferon Production and Protection against Rift Valley Fever Virus during Mucosal Challenge journal May 2013
The Interferon-Stimulated Gene Ifi27l2a Restricts West Nile Virus Infection and Pathogenesis in a Cell-Type- and Region-Specific Manner journal March 2016
Ultrastructural study of Rift Valley fever virus in the mouse model journal September 2012
Encephalitis due to emerging viruses: CNS innate immunity and potential therapeutic targets journal July 2012
Expression of functional NK-1 receptors in murine microglia journal February 2002
ToppGene Suite for gene list enrichment analysis and candidate gene prioritization journal May 2009
Rift Valley Fever Virus Clearance and Protection from Neurologic Disease Are Dependent on CD4 + T Cell and Virus-Specific Antibody Responses journal June 2013
IFN-γ Regulation of Class II Transactivator Promoter IV in Macrophages and Microglia: Involvement of the Suppressors of Cytokine Signaling-1 Protein journal February 2001
A Single-Cell RNA Sequencing Study Reveals Cellular and Molecular Dynamics of the Hippocampal Neurogenic Niche journal December 2017
Update on T cells in the virally infected brain: friends and foes journal January 2020
Microglia retard dengue virus-induced acute viral encephalitis journal June 2016
Transcription factor IRF1 is responsible for IRF8-mediated IL-1β expression in reactive microglia journal August 2015
Aerosol Exposure to Rift Valley Fever Virus Causes Earlier and More Severe Neuropathology in the Murine Model, which Has Important Implications for Therapeutic Development journal April 2013
The challenging management of Rift Valley Fever in humans: literature review of the clinical disease and algorithm proposal journal January 2020
Neutrophil and macrophage influx into the central nervous system are inflammatory components of lethal Rift Valley fever encephalitis in rats journal June 2019
A molecular atlas of cell types and zonation in the brain vasculature journal February 2018
A privileged brain journal October 2021
Microbiome Influences Prenatal and Adult Microglia in a Sex-Specific Manner journal January 2018
Generation of a microglial developmental index in mice and in humans reveals a sex difference in maturation and immune reactivity: HANAMSAGAR et al. journal June 2017
Microglia in Alzheimer’s Disease: A Target for Therapeutic Intervention journal November 2021
Rift Valley fever virus ( Bunyaviridae: Phlebovirus ): an update on pathogenesis, molecular epidemiology, vectors, diagnostics and prevention journal May 2010