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Japanese encephalitis viral infection modulates proinflammatory cyto/chemokine profile in primary astrocyte and cell line of astrocytic origin
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Japanese encephalitis viral infection modulates proinflammatory cyto/chemokine profile in primary astrocyte and cell line of astrocytic origin
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Journal Article
Japanese encephalitis viral infection modulates proinflammatory cyto/chemokine profile in primary astrocyte and cell line of astrocytic origin
2022
Overview
Japanese Encephalitis Virus (JEV) is a neurotropic virus that invades Central Nervous System (CNS) and causes severe neuroinflammation. Given the abundance and the position of astrocytes in the CNS, we speculate that they might play a critical role in the process of neuroinflammation. Unfortunately, the role of astrocytes in JEV-mediated neuroinflammation has long been understated. In this study, we have attempted to assess the role of astrocyte-mediated neuroinflammation upon JEV infection. Mouse model of JEV infection, generated by intraperitoneal injection, showed severe reactive astrogliosis. To further address our hypothesis, we employed immortalized astrocytic cell line (in vitro) and primary astrocyte-enriched culture (ex vivo) as experimental models. JEV infection in the astrocytes induces proinflammatory cytokines like MCP1/CCL2 and IL6 in both ex vivo and in vitro cultures as observed from the cytometric bead array analysis. A significantly altered cytokine profile was observed using PCR analysis in in vitro and ex vivo models upon infection, with respect to control, validating our previous results. We also show that there exists a major inconsistency in the viral replication kinetics, wherein the cell line showed a robust rate of replication whereas the primary astrocyte-enriched culture showed negligibly low number of plaques, underlining the importance of the selection of appropriate experimental model system. In conclusion, we claim that astrocytes significantly contribute to JEV-mediated neuroinflammation, despite not being a CNS immune cell.
Publisher
Springer Nature B.V
