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Learn MoreThe role of astrocytes in innate immunity during viral infections of the central nervous system (CNS) remains to be fully elucidated. Here, we demonstrate that type I interferon (IFN) receptor (IFNAR) signaling in astrocytes regulates blood-brain barrier permeability and protects the cerebellum from infection and immunopathology. Mice with astrocytes lacking IFNAR signaling showed decreased survival after West Nile virus infection that was not due to expanded viral tropism or increased replication. Pattern recognition receptors and IFN-stimulated genes (ISGs) had higher basal and IFN-induced expression in human and mouse cerebellar astrocytes compared to cerebral cortical astrocytes. Our data identify cerebellar astrocytes as key responders to viral infection and highlight distinct innate immune programs in astrocytes from evolutionarily disparate regions of the CNS. SOURCE: Michael Gale, Jr (data@ciiid.washington.edu) - University of Washington
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