FASEB J.
2016 May;30(5):1757-66. doi: 10.1096/fj.15-281410. Epub 2016 Jan 26.
The VP3 structural protein of foot-and-mouth disease virus inhibits the IFN-β signaling pathway.
Li D
1,
Yang W
1,
Yang F
1,
Liu H
1,
Zhu Z
1,
Lian K
1,
Lei C
2,
Li S
2,
Liu X
1,
Zheng H
3,
Shu H
4.
- 1State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, National Foot and Mouth Diseases Reference Laboratory, Chinese Academy of Agricultural Sciences, Lanzhou, China; and.
- 2Collaborative Innovation Center for Viral Immunology, Medical Research Institute, Wuhan University, Wuhan, China.
- 3State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, National Foot and Mouth Diseases Reference Laboratory, Chinese Academy of Agricultural Sciences, Lanzhou, China; and haixuezheng@163.com.
- 4Collaborative Innovation Center for Viral Immunology, Medical Research Institute, Wuhan University, Wuhan, China. shuh@whu.edu.cn.
Abstract
Foot-and-mouth disease is a frequently occurring disease of cloven-hoofed animals that is caused by infection with the foot-and-mouth virus (FMDV). FMDV circumvents the type-I IFN response by expressing proteins that antagonize cellular innate immunity, such as leader protease and 3C protease. We identified the FMDV structural protein VP3 as a negative regulator of the virus-triggered IFN-β signaling pathway. Expression of FMDV VP3 inhibited the Sendai virus-triggered activation of IFN regulatory factor-3 and the expression of retinoic acid-inducible gene-I/melanoma differentiation-associated protein-5. Transient transfection and coimmunoprecipitation confirmed that the structural protein VP3 interacts with virus-induced signaling adapter (VISA), which is dependent on the C-terminal aa 111-220 of VP3. In addition, we found that FMDV VP3 inhibits the expression of VISA by disrupting its mRNA. Taken together, our findings reveal a novel strategy used by the structural VP3 protein of FMDV to evade host innate immunity.-Li, D., Yang, W., Yang, F., Liu, H., Zhu, Z., Lian, K., Lei, C., Li, S., Liu, X., Zheng, H., Shu, H. The VP3 structural protein offoot-and-mouth disease virus inhibits the IFN-β signaling pathway.
© FASEB.
KEYWORDS:
Aphthovirus; innate immunity; pathogen
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