Saliva of Ixodes ricinus enhances TBE virus replication in dendritic cells by modulation of pro-survival Akt pathway.
Virology
; 514: 98-105, 2018 01 15.
Article
em En
| MEDLINE
| ID: mdl-29156399
ABSTRACT
It has been suggested that tick saliva facilitates transmission of tick-borne encephalitis virus (TBEV) to vertebrates. The mechanism of this facilitation has not been elucidated yet. Since dendritic cells (DCs) are among first cells attacked by the virus, we examined the amount of virus and changes induced by saliva in TBEV-infected DCs. We found that virus replication was significantly increased by saliva of Ixodes ricinus tick. Next, saliva-induced enhancement of Akt pathway activation was observed in TBEV-infected DCs. Akt mediated pathway is known for its anti-apoptotic and pro-survival effects. Accordingly, apoptosis of TBEV-infected DCs was declined and cellular viability increased in the presence of tick saliva. Saliva-induced enhancement of STAT1 and NF-κB was also observed in TBEV-infected DCs. In conclusion, we suggest that tick saliva provides pro-survival and anti-apoptotic signals to infected DCs via upregulation of Akt, which may have positive consequences for TBEV replication and transmission.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Saliva
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Células Dendríticas
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Ixodes
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Encefalite Transmitida por Carrapatos
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Vírus da Encefalite Transmitidos por Carrapatos
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Proteínas Proto-Oncogênicas c-akt
Limite:
Animals
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Female
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Humans
Idioma:
En
Revista:
Virology
Ano de publicação:
2018
Tipo de documento:
Article