Host-Level Susceptibility and IRF1 Expression Influence the Ability of IFN-γ to Inhibit KSHV Infection in B Lymphocytes

Overview

Journal Viruses

Publisher MDPI

Specialty Microbiology

Date 2022 Oct 27

PMID 36298850

Authors

Nedaa Alomari

Jennifer Totonchy

Affiliations

Soon will be listed here.

Abstract

Kaposi's sarcoma-associated herpesvirus (KSHV) is associated with vascular endothelial cell tumor, Kaposi's sarcoma (KS) and lymphoproliferative disorder, multicentric Castleman's disease (MCD), primary effusion lymphoma (PEL) and KSHV inflammatory cytokine syndrome (KICS). Dysregulation of proinflammatory cytokines is found in most KSHV associated diseases. However, little is known about the role of host microenvironment in the regulation of KSHV establishment in B cells. In the present study, we demonstrated that IFN-γ has a strong inhibitory effect on KSHV infection but only in a subset of tonsil-derived lymphocyte samples that are intrinsically more susceptible to infection, contain higher proportions of naïve B cells, and display increased levels of IRF1 and STAT1-pY701. The effect of IFN-γ in responsive samples was associated with increased frequencies of germinal center B cells (GCB) and decreased infection of plasma cells, suggesting that IFN-γ-mediated modulation of viral dynamics in GC can inhibit the establishment of KSHV infection.

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