Abstract
The endoplasmic reticulum (ER) is crucial for maintaining cellular homeostasis, and synthesis and folding of proteins and lipids. The ER is sensitive to stresses including viral infection that perturb the intracellular energy level and redox state, and accumulating unfolded/misfolded proteins. Viruses including Japanese encephalitis virus (JEV) activates unfolded protein response (UPR) causing ER stress in host immune cells and promotes inflammation and apoptotic cell death. The chemokine receptor CXCR3 has been reported to play important role in the accumulation of inflammatory immune cells and neuronal cell death in several disease conditions. Recently we described the involvement of CXCR3 in regulating inflammation and JEV infection in mice brain. Supplementation with a CXCR3 antagonist AMG487 significantly reduced JEV infection in the mice brain in conjunction with the downregulation of UPR pathway via PERK:eIF2α:CHOP, and decreased mitochondrial ROS generation, inflammation and apoptotic cell death. Alongside, AMG487 treatment improved interferon (IFN)-α/β synthesis in JEV-infected mice brain. Thus, suggesting a potential therapeutic role of CXCR3 antagonist against JEV infection.
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