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- W4313384032 abstract "Abstract Tumor necrosis factor related apoptosis-inducing ligand (TRAIL) regulates cellular apoptosis and inflammation, and growing evidence indicates a key role in antiviral defense. Cytomegalovirus (CMV, a b-herpesvirus) establishes a lifelong persistent/latent infection that depends upon viral subversion of host innate and adaptive defenses. We have shown that both human and mouse CMV inhibit signaling by the TRAIL death receptors (DR) through the use of specific viral proteins. MCMV m166 blocks TRAIL-DR expression and promotes early viral replication by evading TRAIL-mediated natural killer (NK) cell defenses. After one week of systemic replication, MCMV spreads to the salivary glands (SG), the major mucosal organ responsible for horizontal transmission of the virus. We show that a MCMVΔm166 mutant replicates at lower absolute levels in the SG, but, surprisingly, persists for much longer times. Recent evidence suggests a role of type 1 Innate Lymphoid cells (ILC1) in control/clearance of MCMV. We investigated the role of the 2 main ILC1 populations (conventional and tissue resident (tr) NK cells) in controlling MCMV SG persistence. Depleting ILC1 prior to infection, or infection of TRAIL−/− mice, restored MCMVΔm166 SG replication to normal levels. In addition, SG trNK cells display a unique phenotype and express high levels of TRAIL during MCMV infection when compared to their conventional counterparts. Together our data reveal a key role for m166 inhibition of TRAIL-DR expression in promoting viral persistence by blocking ILC1 effector functions mediated by TRAIL, highlighting this TNF-family cytokine as an important factor regulating innate defenses in mucosal tissues." @default.
- W4313384032 created "2023-01-06" @default.
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- W4313384032 date "2018-05-01" @default.
- W4313384032 modified "2023-10-14" @default.
- W4313384032 title "Cytomegalovirus blockade of TRAIL-mediated type 1 ILC defenses regulates viral persistence" @default.
- W4313384032 doi "https://doi.org/10.4049/jimmunol.200.supp.126.3" @default.
- W4313384032 hasPublicationYear "2018" @default.
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