Analysis of Porcine RIG-I Like Receptors Revealed the Positive Regulation of RIG-I and MDA5 by LGP2.
Analysis of Porcine RIG-I Like Receptors Revealed the Positive Regulation of RIG-I and MDA5 by LGP2.
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猪 RIG-I 样受体分析揭示 LGP2 对 RIG-I 和 MDA5 的正向调节
DOI:
10.3389/fimmu.2021.609543
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发表时间:
2021
影响因子:
7.3
通讯作者:
Zhu J
中科院分区:
文献类型:
--
作者:
Li S;Yang J;Zhu Y;Wang H;Ji X;Luo J;Shao Q;Xu Y;Liu X;Zheng W;Meurens F;Chen N;Zhu J
The RLRs play critical roles in sensing and fighting viral infections especially RNA virus infections. Despite the extensive studies on RLRs in humans and mice, there is a lack of systemic investigation of livestock animal RLRs. In this study, we characterized the porcine RLR members RIG-I, MDA5 and LGP2. Compared with their human counterparts, porcine RIG-I and MDA5 exhibited similar signaling activity to distinct dsRNA and viruses, via similar and cooperative recognitions. Porcine LGP2, without signaling activity, was found to positively regulate porcine RIG-I and MDA5 in transfected porcine alveolar macrophages (PAMs), gene knockout PAMs and PK-15 cells. Mechanistically, LGP2 interacts with RIG-I and MDA5 upon cell activation, and promotes the binding of dsRNA ligand by MDA5 as well as RIG-I. Accordingly, porcine LGP2 exerted broad antiviral functions. Intriguingly, we found that porcine LGP2 mutants with defects in ATPase and/or dsRNA binding present constitutive activity which are likely through RIG-I and MDA5. Our work provided significant insights into porcine innate immunity, species specificity and immune biology.
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影响因子:
4.8
作者:
Li P;Zhang X;Cao W;Yang F;Du X;Shi Z;Zhang M;Liu X;Zhu Z;Zheng H
通讯作者:
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3.8
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4.8
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