Logo image
Frontline Science: CD40 signaling restricts RNA virus replication in Mϕs, leading to rapid innate immune control of acute virus infection
Journal article   Peer reviewed

Frontline Science: CD40 signaling restricts RNA virus replication in Mϕs, leading to rapid innate immune control of acute virus infection

Kai J Rogers, Olena Shtanko, Laura L Stunz, Laura N Mallinger, Tina Arkee, Megan E Schmidt, Dana Bohan, Bethany Brunton, Judith M White, Steve M Varga, …
Journal of leukocyte biology, Vol.109(2), pp.309-325
02/2021
DOI: 10.1002/JLB.4HI0420-285RR
PMCID: PMC7774454
PMID: 32441445

View Online

Abstract

Many acute viral infections target tissue Mϕs, yet the mechanisms of Mϕ-mediated control of viruses are poorly understood. Here, we report that CD40 expressed by peritoneal Mϕs restricts early infection of a broad range of RNA viruses. Loss of CD40 expression enhanced virus replication as early as 12-24 h of infection and, conversely, stimulation of CD40 signaling with an agonistic Ab blocked infection. With peritoneal cell populations infected with the filovirus, wild-type (WT) Ebola virus (EBOV), or a BSL2 model virus, recombinant vesicular stomatitis virus encoding Ebola virus glycoprotein (rVSV/EBOV GP), we examined the mechanism conferring protection. Here, we demonstrate that restricted virus replication in Mϕs required CD154/CD40 interactions that stimulated IL-12 production through TRAF6-dependent signaling. In turn, IL-12 production resulted in IFN-γ production, which induced proinflammatory polarization of Mϕs, protecting the cells from infection. These CD40-dependent events protected mice against virus challenge. CD40 mice were exquisitely sensitive to intraperitoneal challenge with a dose of rVSV/EBOV GP that was sublethal to CD40 mice, exhibiting viremia within 12 h of infection and rapidly succumbing to infection. This study identifies a previously unappreciated role for Mϕ-intrinsic CD40 signaling in controlling acute virus infection.
Signal Transduction Acute Disease Animals CD40 Antigens - metabolism CD40 Ligand - metabolism Ebolavirus - physiology Glycoproteins - immunology Humans Immunity, Innate Interferon-gamma - metabolism Interleukin-12 - biosynthesis Macrophages - immunology Macrophages - virology Mice, Inbred C57BL Models, Biological Peritoneum - pathology Peritoneum - virology RNA Viruses - physiology TNF Receptor-Associated Factor 6 - metabolism Virus Diseases - immunology Virus Diseases - virology Virus Replication - physiology

Details

Metrics

Logo image