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Learn MoreZika virus (ZIKV) is an emerging, mosquito-borne pathogen associated with a widespread 20152016 epidemic in the Western Hemisphere and a proven cause of microcephaly and other fetal brain defects in infants born to infected mothers. ZIKV infections have been also linked to other neurological illnesses in infected adults and children, including Guillain-Barr syndrome (GBS), acute flaccid paralysis (AFP) and meningoencephalitis, but the viral pathophysiology behind those conditions remains poorly understood. Here we investigated ZIKV infectivity in neuroblastoma SH-SY5Y cells, both undifferentiated and following differentiation with retinoic acid. We perform RNA seq, and global trancriptome analysis to corroborate the effect of retinoic acid in SH-SY5Y cells. Then we analyze the virus infection in differentiated and undifferntiated cells. We found that multiple ZIKV strains, representing both the prototype African and contemporary Asian epidemic lineages, were able to replicate in SH-SY5Y cells. Differentiation with resultant expression of mature neuron markers increased infectivity in these cells, and the extent of infectivity correlated with degree of differentiation. Enhanced ZIKV infectivity in a neural cell line following differentiation may contribute to viral neuropathogenesis in the developing or mature central nervous system. SOURCE: Charles Chiu (charles.chiu@ucsf.edu) - Chiu Laboratory University of California, San Francisco
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