PMID- 36211339 OWN - NLM STAT- MEDLINE DCOM- 20221011 LR - 20221014 IS - 1664-3224 (Electronic) IS - 1664-3224 (Linking) VI - 13 DP - 2022 TI - Herpes simplex virus type 2 inhibits TNF-alpha-induced NF-kappaB activation through viral protein ICP22-mediated interaction with p65. PG - 983502 LID - 10.3389/fimmu.2022.983502 [doi] LID - 983502 AB - Herpes simplex virus type 2 (HSV-2) is a prevalent human pathogen and the main cause of genital herpes. After initial infection, HSV-2 can establish lifelong latency within dorsal root ganglia by evading the innate immunity of the host. NF-kappaB has a crucial role in regulating cell proliferation, inflammation, apoptosis, and immune responses. It is known that inhibition of NF-kappaB activation by a virus could facilitate it to establish infection in the host. In the current study, we found that HSV-2 inhibited TNF-alpha-induced activation of NF-kappaB-responsive promoter in a dose-dependent manner, while UV-inactivated HSV-2 did not have such capability. We further identified the immediate early protein ICP22 of HSV-2 as a vital viral element in inhibiting the activation of NF-kappaB-responsive promoter. The role of ICP22 was confirmed in human cervical cell line HeLa and primary cervical fibroblasts in the context of HSV-2 infection, showing that ICP22 deficient HSV-2 largely lost the capability in suppressing NF-kappaB activation. HSV-2 ICP22 was further shown to suppress the activity of TNF receptor-associated factor 2 (TRAF2)-, IkappaB kinase alpha (IKK alpha)-, IKK beta-, IKK gamma-, or p65-induced activation of NF-kappaB-responsive promoter. Mechanistically, HSV-2 ICP22 inhibited the phosphorylation and nuclear translocation of p65 by directly interacting with p65, resulting in the blockade of NF-kappaB activation. Furthermore, ICP22 from several alpha-herpesviruses could also inhibit NF-kappaB activation, suggesting the significance of ICP22 in herpesvirus immune evasion. Findings in this study highlight the importance of ICP22 in inhibiting NF-kappaB activation, revealing a novel mechanism by which HSV-2 evades the host antiviral responses. CI - Copyright (c) 2022 Hu, Fu, Li, Zhang, Li, Hu and Zhang. FAU - Hu, Huimin AU - Hu H AD - State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China. AD - Savaid Medical School, University of Chinese Academy of Sciences, Beijing, China. FAU - Fu, Ming AU - Fu M AD - State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China. AD - Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China. FAU - Li, Chuntian AU - Li C AD - State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China. AD - Savaid Medical School, University of Chinese Academy of Sciences, Beijing, China. FAU - Zhang, Binman AU - Zhang B AD - State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China. AD - Savaid Medical School, University of Chinese Academy of Sciences, Beijing, China. FAU - Li, Yuncheng AU - Li Y AD - State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China. AD - Savaid Medical School, University of Chinese Academy of Sciences, Beijing, China. FAU - Hu, Qinxue AU - Hu Q AD - State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China. AD - Institute for Infection and Immunity, St George's, University of London, London, United Kingdom. FAU - Zhang, Mudan AU - Zhang M AD - State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China. LA - eng PT - Journal Article DEP - 20220923 PL - Switzerland TA - Front Immunol JT - Frontiers in immunology JID - 101560960 RN - 0 (Antiviral Agents) RN - 0 (ICP22 protein, human herpesvirus 1) RN - 0 (Immediate-Early Proteins) RN - 0 (NF-kappa B) RN - 0 (TNF Receptor-Associated Factor 2) RN - 0 (Tumor Necrosis Factor-alpha) RN - 0 (Viral Proteins) RN - EC 2.7.11.10 (I-kappa B Kinase) SB - IM MH - Antiviral Agents MH - *Herpesvirus 1, Human/metabolism MH - Herpesvirus 2, Human/metabolism MH - Humans MH - I-kappa B Kinase/metabolism MH - *Immediate-Early Proteins/genetics/metabolism MH - NF-kappa B/metabolism MH - TNF Receptor-Associated Factor 2/metabolism MH - Tumor Necrosis Factor-alpha/metabolism MH - Viral Proteins/metabolism PMC - PMC9538160 OTO - NOTNLM OT - HSV-2 OT - ICP22 OT - NF-kappaB OT - immune evasion OT - p65 COIS- The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2022/10/11 06:00 MHDA- 2022/10/12 06:00 PMCR- 2022/01/01 CRDT- 2022/10/10 03:52 PHST- 2022/07/01 00:00 [received] PHST- 2022/09/06 00:00 [accepted] PHST- 2022/10/10 03:52 [entrez] PHST- 2022/10/11 06:00 [pubmed] PHST- 2022/10/12 06:00 [medline] PHST- 2022/01/01 00:00 [pmc-release] AID - 10.3389/fimmu.2022.983502 [doi] PST - epublish SO - Front Immunol. 2022 Sep 23;13:983502. doi: 10.3389/fimmu.2022.983502. eCollection 2022.