Dengue Virus Induces NK Cell Activation through TRAIL Expression during Infection.

Abstract:

:Dengue is an acute febrile illness with a wide spectrum of signs and symptoms ranging from mild to severe forms characterized by plasma leakage that can be fatal. NK cells are one of the main effectors in early infection and may play an important role in dengue pathogenesis. We investigated NK cell involvement during dengue infection. A higher frequency of NK cell subsets and TRAIL+NK cells was found in mild DF cases when compared to that in severe cases or healthy donors. NK activation markers such as CD107a and TLR3 were upregulated in patients' cells compared to those in healthy donors. In addition, IL12 related to NK cell activation were upregulated in mild DF cases. In vitro PBMC culture models show that DENV-stimulated and IFNα-stimulated NK cells were able to express TRAIL, suggesting an indirect activation of cells, regarding TRAIL expression. Type I IFN receptor blockage on DENV-stimulated PBMCs showed TRAIL expression on NK cells is partially IFNα dependent. In addition, during PBMC stimulation, TRAIL expression on NK cells was inversely correlated with DENV-positive monocytes. Therefore, we observed DENV-induced activation of NK cell populations. A higher activation of NK cells would promote limited viral spread, resulting in decreased inflammatory response, contributing to protection against dengue severity.

journal_name

Mediators Inflamm

authors

Gandini M,Petitinga-Paiva F,Marinho CF,Correa G,De Oliveira-Pinto LM,de Souza LJ,Cunha RV,Kubelka CF,de Azeredo EL

doi

10.1155/2017/5649214

subject

Has Abstract

pub_date

2017-01-01 00:00:00

pages

5649214

eissn

0962-9351

issn

1466-1861

journal_volume

2017

pub_type

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