Matrix metalloproteinase 3 promotes cellular anti-dengue virus response via interaction with transcription factor NFκB in cell nucleus

• Published in: PloS one Vol. 9; no. 1; p. e84748
• Main Authors: Zuo, Xiangyang, Pan, Wen, Feng, Tingting, Shi, Xiaohong, Dai, Jianfeng
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 2014; Public Library of Science (PLoS)
• Subjects: Active Transport, Cell Nucleus; Alzheimer's disease; Alzheimers disease; Animals; Antiviral agents; Apoptosis; Aquatic insects; Biology; Cell Line; Cell Nucleus - metabolism; Chemokines; Cytokines; Cytokines - genetics; Cytoplasm - metabolism; Dengue fever; Dengue hemorrhagic fever; Dengue virus; Dengue Virus - physiology; Down-Regulation; Endopeptidase; Endopeptidases; Fever; Gene expression; Gene Silencing; Global health; Hemopexin; Humans; Immunoglobulins; Immunomodulation; Immunoprecipitation; Infections; Inflammation; Ischemia; Laboratories; Ligands; Localization; Matrix metalloproteinase; Matrix Metalloproteinase 3 - chemistry; Matrix Metalloproteinase 3 - deficiency; Matrix Metalloproteinase 3 - genetics; Matrix Metalloproteinase 3 - metabolism; Medicine; Metalloproteinase; Mice; NF-kappa B - metabolism; NF-κB protein; Nuclei; Nuclei (cytology); Plasmids; Polymerase chain reaction; Protein Binding; Protein Structure, Tertiary; RNA, Small Interfering - genetics; siRNA; Stromelysin; Stromelysin 1; Transcription factors; Up-Regulation; Vaccines; Vector-borne diseases; Viral diseases; Viral infections; Viruses; West Nile virus
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0084748

Dengue virus (DENV), the causative agent of human Dengue hemorrhagic fever, is a mosquito-borne virus of immense global health importance. Characterization of cellular factors promoting or inhibiting DENV infection is important for understanding the mechanism of DENV infection. In this report, MMP3 (stromelysin-1), a secretory endopeptidase that degrades extracellular matrices, has been shown promoting cellular antiviral response against DENV infection. Quantitative RT-PCR and Western Blot showed that the expression of MMP3 was upregulated in DENV-infected RAW264.7 cells. The intracellular viral loads were significantly higher in MMP3 silenced cells compared with controls. The expression level of selective anti-viral cytokines were decreased in MMP3 siRNA treated cells, and the transcription factor activity of NFκB was significantly impaired upon MMP3 silencing during DENV infection. Further, we found that MMP3 moved to cell nucleus upon DENV infection and colocalized with NFκB P65 in nucleus. Co-immunoprecipitation analysis suggested that MMP3 directly interacted with NFκB in nucleus during DENV infection and the C-terminal hemopexin-like domain of MMP3 was required for the interaction. This study suggested a novel role of MMP3 in nucleus during viral infection and provided new evidence for MMPs in immunomodulation.