Abstract West Nile virus (WNV) is an emerging neurotropic flavivirus that has recently spread to America and Southern Europe via an enzootic/epizootic bird-mosquito-bird transmission cycle. The virus can occasionally infect humans through mosquito bites, and man-to-man transmission has also been reported via infected blood or organ donation. In the human host, WNV causes asymptomatic infection in about 70%-80% of cases, while < 1% of clinical cases progress to severe neuroinvasive disease; long-term neurological sequelae are common in more than 50% of these severe cases. The pathogenesis of the neuroinvasive form of WNV infection remains incompletely understood, and risk factors for developing severe clinical illness are largely unknown. The innate immune response plays a major role in the control of WNV replication, which is supported by the fact that the virus has developed numerous mechanisms to escape the control of antiviral interferons. However, exaggerated inflammatory responses lead to pathology, mainly involving the central nervous system. This brief review presents the salient features of innate host responses, WNV immunoevasion strategies, and WNV-induced immunopathology.

Innate host responses to West Nile virus: Implications for central nervous system immunopathology / Rossini G;Landini MP;Gelsomino F;Sambri V;Varani S. - In: WORLD JOURNAL OF VIROLOGY. - ISSN 2220-3249. - ELETTRONICO. - 2:2(2013), pp. 49-56. [10.5501/wjv.v2.i2.49]

Innate host responses to West Nile virus: Implications for central nervous system immunopathology.

LANDINI, MARIA PAOLA;SAMBRI, VITTORIO;VARANI, STEFANIA
2013

Abstract

Abstract West Nile virus (WNV) is an emerging neurotropic flavivirus that has recently spread to America and Southern Europe via an enzootic/epizootic bird-mosquito-bird transmission cycle. The virus can occasionally infect humans through mosquito bites, and man-to-man transmission has also been reported via infected blood or organ donation. In the human host, WNV causes asymptomatic infection in about 70%-80% of cases, while < 1% of clinical cases progress to severe neuroinvasive disease; long-term neurological sequelae are common in more than 50% of these severe cases. The pathogenesis of the neuroinvasive form of WNV infection remains incompletely understood, and risk factors for developing severe clinical illness are largely unknown. The innate immune response plays a major role in the control of WNV replication, which is supported by the fact that the virus has developed numerous mechanisms to escape the control of antiviral interferons. However, exaggerated inflammatory responses lead to pathology, mainly involving the central nervous system. This brief review presents the salient features of innate host responses, WNV immunoevasion strategies, and WNV-induced immunopathology.
2013
Innate host responses to West Nile virus: Implications for central nervous system immunopathology / Rossini G;Landini MP;Gelsomino F;Sambri V;Varani S. - In: WORLD JOURNAL OF VIROLOGY. - ISSN 2220-3249. - ELETTRONICO. - 2:2(2013), pp. 49-56. [10.5501/wjv.v2.i2.49]
Rossini G;Landini MP;Gelsomino F;Sambri V;Varani S
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/265922
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