- Innate immunity to enteric virus infection by IFN?-stimulated-gene expression Antiviral immunity in the intestine and other mucosal surfaces faces a distinct challenge: clearance of viral infection while maintaining barrier function and tolerance of the bacterial microbiome. To maintain this balance, immune mechanisms with specificity to mucosal surfaces have evolved. Interferon lambda (IFN?) stimulates antiviral responses in intestinal epithelial cells (IECs) and is a critical component of intestinal immunity in mouse models of norovirus (MNV) and rotavirus (MRV) infection; this requirement for IFN? in control of these enteric virus infections distinguishes it from other interferon types. Additionally, the bacterial microbiome promotes MNV infection in an IFN? receptor- (IFNLR) dependent manner, suggesting that the microbiome alters the IFN?-stimulated antiviral response. This proposal aims to close the gap in our understanding regarding transcriptional programs unique to IFN?, the effect of the bacterial microbiome on those transcriptional programs, and the specific interferon stimulated genes (ISGs) required for viral control.
Specific Aim 1 will comprehensively characterize the transcriptional response in IECs and identify the genes necessary for cell-intrinsic control of rotavirus infection.
Specific Aim 2 will use novel intestinal macrophage and IEC co- culture system to identify mechanisms by which IFN? stimulates cell-extrinsic clearance of MNV.
Specific Aim 3 will determine the role of the commensal microbiome in regulation of IFN?-stimulated antiviral responses. The long-term goal of this work is to discover novel aspects of IFN biology and its regulation in the intestine that will aid in rational development of antivirals and immunotherapies.

Public Health Relevance

- Innate immunity to enteric virus infection by IFN?-stimulated-gene expression IFN? is an antiviral cytokine that is necessary for the intestinal antiviral response. This proposal aims to discover novel gene expression programs stimulated by IFN? and their regulation by the bacterial microbiome.

Agency
National Institute of Health (NIH)
Institute
National Institute of Allergy and Infectious Diseases (NIAID)
Type
Research Project (R01)
Project #
5R01AI130055-04
Application #
9918845
Study Section
Innate Immunity and Inflammation Study Section (III)
Program Officer
Singleton, Kentner L
Project Start
2017-05-09
Project End
2022-04-30
Budget Start
2020-05-01
Budget End
2021-04-30
Support Year
4
Fiscal Year
2020
Total Cost
Indirect Cost
Name
Oregon Health and Science University
Department
Other Basic Sciences
Type
Schools of Medicine
DUNS #
096997515
City
Portland
State
OR
Country
United States
Zip Code
97239
Van Winkle, Jacob A; Robinson, Bridget A; Peters, A Mack et al. (2018) Persistence of Systemic Murine Norovirus Is Maintained by Inflammatory Recruitment of Susceptible Myeloid Cells. Cell Host Microbe 24:665-676.e4
Nice, Timothy J; Robinson, Bridget A; Van Winkle, Jacob A (2018) The Role of Interferon in Persistent Viral Infection: Insights from Murine Norovirus. Trends Microbiol 26:510-524