Viral pathogenesis in mice is similar for West Nile virus derived from mosquito and mammalian cells

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• 作者：Pei-Yin Lim ; Karen L. Louie ; Linda M. Styer ; Pei-Yong Shi ; Kristen A. Bernard
• 关键词：West Nile virus ; Flavivirus ; Virus– ; host interaction ; Pathogenesis ; Type I interferon ; Dendritic cells ; Skin ; Mosquito ; Mice
• 刊名：Virology
• 出版年：2010
• 出版时间：25 April 2010
• 年：2010
• 卷：400
• 期：1
• 页码：93-103
• 全文大小：1193 K

文摘

West Nile virus (WNV) is a mosquito-borne pathogen. During replication, WNV acquires different carbohydrates and lipid membranes, depending on its mosquito or vertebrate hosts. Consequently, WNV derived from mosquito and vertebrate cell lines differ in their infectivity for dendritic cells (DCs) and induction of type I interferon (IFN-α/β) in vitro. We evaluated the pathogenesis of WNV derived from mosquito (WNV^C6/36) and vertebrate (WNV^BHK) cell lines in mice. The tissue tropism, infectivity, clinical disease, and mortality did not differ for mice inoculated with WNV^C6/36 or WNV^BHK, and there were only minor differences in viral load and serum levels of IFN-α/β. The replication kinetics of WNV^C6/36 and WNV^BHK were equivalent in primary DCs and skin cells although primary DCs were more susceptible to WNV^C6/36 infection than to WNV^BHK infection, suggesting that less virus is produced per infected cell for WNV^C6/36. In conclusion, viral source has minimal effect on WNV pathogenesis in vivo.