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Hydroxychloroquine-inhibited dengue virus is associated with host defense machinery #MMPMID25321315
Wang LF; Lin YS; Huang NC; Yu CY; Tsai WL; Chen JJ; Kubota T; Matsuoka M; Chen SR; Yang CS; Lu RW; Lin YL; Chang TH
J Interferon Cytokine Res 2015[Mar]; 35 (3): 143-56 PMID25321315show ga
Hydroxychloroquine (HCQ) is an antimalarial drug also used in treating autoimmune diseases. Its antiviral activity was demonstrated in restricting HIV infection in vitro; however, the clinical implications remain controversial. Infection with dengue virus (DENV) is a global public health problem, and we lack an antiviral drug for DENV. Here, we evaluated the anti-DENV potential of treatment with HCQ. Immunofluorescence assays demonstrated that HCQ could inhibit DENV serotype 1-4 infection in vitro. RT-qPCR analysis of HCQ-treated cells showed induced expression of interferon (IFN)-related antiviral proteins and certain inflammatory cytokines. Mechanistic study suggested that HCQ activated the innate immune signaling pathways of IFN-beta, AP-1, and NFkappaB. Knocking down mitochondrial antiviral signaling protein (MAVS), inhibiting TANK binding kinase 1 (TBK1)/inhibitor-kappaB kinase varepsilon (IKKvarepsilon), and blocking type I IFN receptor reduced the efficiency of HCQ against DENV-2 infection. Furthermore, HCQ significantly induced cellular production of reactive oxygen species (ROS), which was involved in the host defense system. Suppression of ROS production attenuated the innate immune activation and anti-DENV-2 effect of HCQ. In summary, HCQ triggers the host defense machinery by inducing ROS- and MAVS-mediated innate immune activation against DENV infection and may be a candidate drug for DENV infection.
|Adaptor Proteins, Signal Transducing/metabolism[MESH]