Viral pathogenesis in mice is similar for West Nile virus derived from mosquito and mammalian cells.
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-alpha/beta) 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-alpha/beta. 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.
Lim
Pei-Yin
PY
Wadsworth Center, New York State Department of Health, P.O. Box 509, Albany, NY 12201, USA.
Louie
Karen L
KL
Styer
Linda M
LM
Shi
Pei-Yong
PY
Bernard
Kristen A
KA
D000330:Aedes; D000818:Animals; D002460:Cell Line; D002522:Chlorocebus aethiops; D006224:Cricetinae; D003713:Dendritic Cells / Q000276:immunology / Q000821:virology; D005260:Female; D054884:Host-Pathogen Interactions; D007370:Interferon Type I / Q000096:biosynthesis; D051379:Mice; D008810:Mice, Inbred C57BL; D013045:Species Specificity; D014709:Vero Cells; D014776:Virus Cultivation; D014779:Virus Replication; D014901:West Nile Fever / Q000276:immunology / Q000821:virology; D014902:West Nile virus / Q000302:isolation & purification / Q000472:pathogenicity* / Q000502:physiology
D007370:Interferon Type I