Article(id=1238813310288711956, tenantId=1146029695717560320, journalId=1192105938417971205, issueId=1238813307784712441, articleNumber=null, orderNo=null, doi=10.13343/j.cnki.wsxb.20250765, pmid=null, cstr=null, oa=null, hot=1, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1760284800000, receivedDateStr=2025-10-13, revisedDate=null, revisedDateStr=null, acceptedDate=1765814400000, acceptedDateStr=2025-12-16, onlineDate=1773285709210, onlineDateStr=2026-03-12, pubDate=1772553600000, pubDateStr=2026-03-04, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1773285709210, onlineIssueDateStr=2026-03-12, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1773285709210, creator=13701087609, updateTime=1775797808660, updator=13701087609, issue=Issue{id=1238813307784712441, tenantId=1146029695717560320, journalId=1192105938417971205, year='2026', volume='66', issue='3', pageStart='961', pageEnd='1466', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1773285708614, creator=13701087609, updateTime=1773291912509, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1238839328915378858, tenantId=1146029695717560320, journalId=1192105938417971205, issueId=1238813307784712441, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1238839328915378859, tenantId=1146029695717560320, journalId=1192105938417971205, issueId=1238813307784712441, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=1225, endPage=1235, ext={EN=ArticleExt(id=1238813310674587941, articleId=1238813310288711956, tenantId=1146029695717560320, journalId=1192105938417971205, language=EN, title=Upregulation of Kelch-like ECH-associated protein 1 represses the replication of herpes simplex virus type 1, columnId=1192149543992045670, journalTitle=Acta Microbiologica Sinica, columnName=Research Article, runingTitle=null, highlight=null, articleAbstract=

Objective To investigate the effect of Kelch-like ECH-associated protein 1 (KEAP1) on the replication of herpes simplex virus type 1 (HSV-1) and thus provide theoretical support for anti-herpes simplex virus research. Methods The mRNA and protein levels of molecules in the KEAP1-NRF2 signaling pathway and viral molecules in ARPE-19 cells infected with HSV-1 were determined by qPCR and Western blotting, respectively. KEAP1-silenced and overexpressing ARPE-19 cell lines were constructed, and Western blotting was employed to assess the effects of KEAP1 silencing and overexpression on the nuclear factor erythroid 2-related factor 2 (NRF2) signaling pathway. The KEAP1-silenced and overexpressing cell lines were subsequently infected with HSV-1. Changes in viral mRNA expression were detected via qPCR, while immunofluorescence and Western blotting were used to evaluate alterations in viral protein expression. Additionally, a plaque formation assay was conducted to measure variations in viral titer. Western blotting was performed on KEAP1-silenced cell lines infected with HSV-1 to assess the expression levels of NRF2 signaling pathway and viral proteins at different time points. Results Silencing of KEAP1 activated the NRF2 signaling pathway and promoted HSV-1 replication, whereas KEAP1 overexpression downregulated the NRF2 signaling pathway and inhibited HSV-1 replication. These findings contradict previous studies suggesting that upregulation and activation of the NRF2 signaling pathway can suppress HSV-1 replication. Further investigation revealed that KEAP1 silencing-induced NRF2 upregulation was significantly inhibited following HSV-1 infection. Conclusion KEAP1 plays a crucial role in the host cell resistance to HSV-1 infection, and its interaction with NRF2 exerts complex biological functions in antiviral immune responses.

, correspAuthors=Lizu XIAO, Rongzhen LI, authorNote=null, correspAuthorsNote=
*E-mail: LI Rongzhen,
XIAO Lizu,
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#These authors contributed equally to this work.

, authorsList=Songbin WU, Lingfeng YE, Pengtao HU, Donglin XIONG, Lizu XIAO, Rongzhen LI), CN=ArticleExt(id=1238813313329582467, articleId=1238813310288711956, tenantId=1146029695717560320, journalId=1192105938417971205, language=CN, title=上调KelchECH相关蛋白1 (KEAP1)抑制单纯疱疹病毒1型复制, columnId=1192149544164012138, journalTitle=微生物学报, columnName=研究报告, runingTitle=null, highlight=null, articleAbstract=

目的 探讨Kelch样ECH相关蛋白1 (Kelch-like ECH-associated protein 1, KEAP1)对单纯疱疹病毒1型(herpes simplex virus type 1, HSV-1)复制的影响,为抗单纯疱疹病毒研究提供理论依据。 方法 通过qPCR和Western blotting试验检测人视网膜色素上皮细胞(ARPE-19细胞)感染HSV-1后KEAP1-NRF2信号通路及病毒分子的mRNA和蛋白表达情况。构建KEAP1沉默和过表达的ARPE-19细胞株,采用Western blotting检测KEAP1沉默和过表达对核因子红细胞2相关因子2 (nuclear factor erythroid 2-related factor 2, NRF2)信号通路的影响。用KEAP1沉默和过表达细胞株感染HSV-1,采用qPCR检测病毒mRNA表达变化,采用免疫荧光和Western blotting检测病毒蛋白表达变化,采用空斑形成试验检测病毒滴度变化。用KEAP1沉默细胞株感染HSV-1,采用Western blotting检测不同时间点NRF2信号通路和病毒蛋白的表达情况。 结果 KEAP1沉默可激活NRF2信号通路,促进HSV-1的复制;KEAP1过表达可下调NRF2信号通路,抑制HSV-1的复制。这一结果与先前研究中关于NRF2信号通路上调及活化可抑制HSV-1复制的结论相矛盾。进一步研究发现,KEAP1沉默诱导的NRF2上调在HSV-1感染后受到显著抑制。 结论 KEAP1在宿主细胞抗HSV-1感染过程中发挥重要作用,其与NRF2的相互作用在抗病毒免疫应答中具有复杂的生物学功能。

, correspAuthors=肖礼祖, 李容珍, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=vzOT0NpptgY1Y1XkucOZeg==, magXml=NJxSmY/aNEe099H0Xqhl5Q==, pdfUrl=null, pdf=PGWIslGVodBDRNrlcGQv5A==, pdfFileSize=2339410, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=CyAo5iSifBg2YSDWKnuqlw==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=9NiLPxNnHlPztzsckx8wng==, mapNumber=null, authorCompany=null, fund=null, authors=

作者贡献声明

吴松斌:实验操作、数据处理与分析、论文撰写与修改;叶凌风:获取基金、协助实验操作、数据处理;胡鹏涛:协助实验操作;熊东林:参与文章编辑和审阅;肖礼祖:提供资源、论文讨论、监督管理;李容珍:获取基金、研究构思与设计、论文撰写与修改。

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Herpes simplex virus 1-induced ferroptosis contributes to viral encephalitis[J]. mBio, 2023, 14(1): e0237022., articleTitle=Herpes simplex virus 1-induced ferroptosis contributes to viral encephalitis, refAbstract=null)], funds=[Fund(id=1238891101055144436, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, awardId=NS2023041, language=EN, fundingSource=Science and Technology Major Project of Shenzhen Nanshan District Health System(NS2023041), fundOrder=null, country=null), Fund(id=1238891101168390655, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, awardId=NS2023041, language=CN, fundingSource=深圳市南山区技术研发和创意设计项目(NS2023041), fundOrder=null, country=null), Fund(id=1238891101290025480, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, awardId=NS2024033, language=EN, fundingSource=Science and Technology Major Project of Shenzhen Nanshan District Health System(NS2024033), fundOrder=null, country=null), Fund(id=1238891101428437524, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, awardId=NS2024033, language=CN, fundingSource=深圳市南山区技术研发和创意设计项目(NS2024033), fundOrder=null, country=null), Fund(id=1238891101516517917, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, awardId=NSZD2024029, language=EN, fundingSource=Shenzhen Nanshan District Healthcare System Science and Technology Key Project(NSZD2024029), fundOrder=null, country=null), Fund(id=1238891101629764134, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, awardId=NSZD2024029, language=CN, fundingSource=深圳市南山区卫生健康系统科技重大项目(NSZD2024029), fundOrder=null, country=null), Fund(id=1238891101763981877, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, awardId=null, language=EN, fundingSource=Municipal Financial Subsidy of Shenzhen Medical Key Discipline Construction, fundOrder=null, country=null), Fund(id=1238891101906588221, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, awardId=null, language=CN, fundingSource=深圳市医学重点学科建设项目(市级财政补贴), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1238891094801436824, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, xref=null, ext=[AuthorCompanyExt(id=1238891094809825433, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, companyId=1238891094801436824, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Department of Pain Medicine and Shenzhen Municipal Key Laboratory for Pain Medicine, Shenzhen Nanshan People’s Hospital, Shenzhen, Guangdong, China), AuthorCompanyExt(id=1238891094818214042, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, companyId=1238891094801436824, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=深圳市南山区人民医院疼痛科,深圳市疼痛学重点实验室,广东 深圳)])], figs=[ArticleFig(id=1238891099318702440, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, language=EN, label=Figure 1, caption=HSV-1 infection inhibits KEAP1 expression.A: mRNA levels of KEAP1, NRF2, HO-1, ICP0, US4 and LAT after HSV-1 infection; B: Protein levels of KEAP1, NRF2, HO-1, ICP0 and gB after HSV-1 infection. **: P<0.01, ***: P<0.001, ****: P<0.000 1 vs. mock group (not infected with HSV-1), ns indicates no significant difference., figureFileSmall=ay+eT4vVSWJXOB9+DPPH1g==, figureFileBig=ip0DqR6BcnDj06OjBwRdlA==, tableContent=null), ArticleFig(id=1238891099461308788, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, language=CN, label=图1, caption=HSV-1感染抑制KEAP1表达。A:HSV-1感染后,KEAP1NRF2HO-1ICP0US4LAT的mRNA水平;B:HSV-1感染后,KEAP1、NRF2、HO-1、ICP0和gB的蛋白水平。与mock组(无HSV-1感染)相比,**:P<0.01,***:P<0.001,****:P<0.000 1,ns表示无显著差异。, figureFileSmall=ay+eT4vVSWJXOB9+DPPH1g==, figureFileBig=ip0DqR6BcnDj06OjBwRdlA==, tableContent=null), ArticleFig(id=1238891099591332230, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, language=EN, label=Figure 2, caption=The effect of KEAP1 silencing on HSV-1 replication. A: ARPE-19 cells were transfected with KEAP1 shRNA or empty plasmid, and the expression of KEAP1 gene was detected by qPCR; B: After silencing KEAP1 using shRNAs that specifically targeted KEAP1, Western blotting was used to detect the protein level of KEAP1; C: KEAP1 silenced and control cells were infected with HSV-1 for a period of 24 h, and qPCR experiments were performed to detect the expression of virus genes ICP0, US4 and LAT; D: ICP0 and gB localization was determined by immunofluorescence assays using a fluorescence microscope to preliminarily determine the replication level of the virus; E: The expression of virus proteins ICP0 and gB were identified by Western blotting; F: Detection of viral titer in the supernatants of KEAP1 silenced cell group and control cell group by plaque assay. **: P<0.01, ***: P<0.001, ****: P<0.000 1 vs. shcontrol group., figureFileSmall=wie9bY8B7g9nDFE/qaYLYw==, figureFileBig=sKlE93FMdGhfGYVFW7LSRQ==, tableContent=null), ArticleFig(id=1238891099700384144, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, language=CN, label=图2, caption=KEAP1沉默对HSV-1复制的影响, figureFileSmall=wie9bY8B7g9nDFE/qaYLYw==, figureFileBig=sKlE93FMdGhfGYVFW7LSRQ==, tableContent=null), ArticleFig(id=1238891099826213271, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, language=EN, label=Figure 3, caption=The effect of KEAP1 overexpression on HSV-1 replication. A: ARPE-19 cells were transfected with KEAP1 plasmid or empty vector plasmid, and the expression of the KEAP1 gene was detected by qPCR; B: Western blotting was used to detect the protein level of KEAP1 after overexpression of KEAP1; C: KEAP1 overexpressing and control cells were infected with HSV-1 for a period of 24 h, and qPCR experiments were performed to detect the expression of virus genes ICP0, US4 and LAT; D: ICP0 and gB localization was determined by immunofluorescence assays using a fluorescence microscope to preliminarily determine the replication level of the virus; E: The expression of virus proteins ICP0 and gB were identified by Western blotting; F: Detection of viral titer in the supernatants of KEAP1 overexpressing cell group and control cell group by plaque assay. *: P<0.05, **: P<0.01, ***: P<0.001, ****: P<0.000 1 vs. vector group., figureFileSmall=HnJq2P/tLUjGTaGasAMw6Q==, figureFileBig=3PRe5NXKi+ybXJsfnRLHKg==, tableContent=null), ArticleFig(id=1238891099943653797, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, language=CN, label=图3, caption=KEAP1过表达对HSV-1复制的影响, figureFileSmall=HnJq2P/tLUjGTaGasAMw6Q==, figureFileBig=3PRe5NXKi+ybXJsfnRLHKg==, tableContent=null), ArticleFig(id=1238891100019151276, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, language=EN, label=Figure 4, caption=The effect of KEAP1 silencing or overexpression on the expression of NRF2 and HO-1. A: Protein levels of KEAP1, NRF2 and HO-1 after KEAP1 silencing; B: Protein levels of KEAP1, NRF2 and HO-1 after KEAP1 overexpression. *: P<0.05, **: P<0.01, ***: P<0.001, ****: P<0.000 1 vs. shcontrol or vector group., figureFileSmall=ej4oJDiBwbyO7+5JIhqWaQ==, figureFileBig=YOOdU8TWYnyZD8+n3WmbPQ==, tableContent=null), ArticleFig(id=1238891100174340533, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, language=CN, label=图4, caption=KEAP1沉默或过表达对NRF2HO-1表达的影响。A:KEAP1沉默后,KEAP1、NRF2和HO-1的蛋白水平;B:过表达KEAP1后,KEAP1、NRF2和HO-1的蛋白水平。*:P<0.05,**:P<0.01,***:P<0.001,****:P<0.000 1 vs.对照组。, figureFileSmall=ej4oJDiBwbyO7+5JIhqWaQ==, figureFileBig=YOOdU8TWYnyZD8+n3WmbPQ==, tableContent=null), ArticleFig(id=1238891100442776002, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, language=EN, label=Figure 5, caption=HSV-1 infection suppresses NRF2 expression in shKEAP1 cell lines. Protein levels of NRF2, HO-1, ICP0, and gB in shKEAP1 cell lines following HSV-1 infection. **: P<0.01, ***: P<0.001, ****: P<0.000 1 vs. control group (not infected with HSV-1), ns indicates no significant difference., figureFileSmall=/pORkW8NBqDQTs9B021flA==, figureFileBig=RaHhTMMl39eGvyZvCJX0Mw==, tableContent=null), ArticleFig(id=1238891100585382346, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, language=CN, label=图5, caption=HSV-1感染抑制shKEAP1细胞株中NRF2表达。shKEAP1细胞株感染HSV-1后,NRF2、HO-1、ICP0和gB的蛋白水平。**:P<0.01,***:P<0.001,****:P<0.000 1 vs.对照组(无HSV-1感染),ns表示无显著差异。, figureFileSmall=/pORkW8NBqDQTs9B021flA==, figureFileBig=RaHhTMMl39eGvyZvCJX0Mw==, tableContent=null), ArticleFig(id=1238891100707017172, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, language=EN, label=Table 1, caption=

Sequence of the primer for qPCR

, figureFileSmall=null, figureFileBig=null, tableContent=
GeneForward primers (5′→3′)Reverse primers (5′→3′)
KEAP1CTGGAGGATCATACCAAGCAGGGGATACCCTCAATGGACACCAC
NRF2TTCCCGGTCACATCGAGAGTCCTGTTGCATACCGTCTAAATC
HO-1AAGACTGCGTTCCTGCTCAACAAAGCCCTACAGCAACTGTCG
ICP0GGTCGCCCTGTCGCCTTAGGTCGCCATGTTTCCCGT
US4TGGACACCCTCTTCGCAGGCACACGTAACG
LATCGCCTTTCCTGTTCTCGCTACGCGGCGTCTTTGTTGA
GAPDHTGGCCTTCCGTGTTCCTACGAGTTGCTGTTGAAGTCGCA
), ArticleFig(id=1238891100816069089, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1238813310288711956, language=CN, label=表1, caption=

qPCR引物序列

, figureFileSmall=null, figureFileBig=null, tableContent=
GeneForward primers (5′→3′)Reverse primers (5′→3′)
KEAP1CTGGAGGATCATACCAAGCAGGGGATACCCTCAATGGACACCAC
NRF2TTCCCGGTCACATCGAGAGTCCTGTTGCATACCGTCTAAATC
HO-1AAGACTGCGTTCCTGCTCAACAAAGCCCTACAGCAACTGTCG
ICP0GGTCGCCCTGTCGCCTTAGGTCGCCATGTTTCCCGT
US4TGGACACCCTCTTCGCAGGCACACGTAACG
LATCGCCTTTCCTGTTCTCGCTACGCGGCGTCTTTGTTGA
GAPDHTGGCCTTCCGTGTTCCTACGAGTTGCTGTTGAAGTCGCA
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上调KelchECH相关蛋白1 (KEAP1)抑制单纯疱疹病毒1型复制
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吴松斌 , 叶凌风 , 胡鹏涛 , 熊东林 , 肖礼祖 * , 李容珍 *
微生物学报 | 研究报告 2026,66(3): 1225-1235
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微生物学报 | 研究报告 2026, 66(3): 1225-1235
上调KelchECH相关蛋白1 (KEAP1)抑制单纯疱疹病毒1型复制
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吴松斌, 叶凌风, 胡鹏涛, 熊东林, 肖礼祖* , 李容珍*
作者信息
  • 深圳市南山区人民医院疼痛科,深圳市疼痛学重点实验室,广东 深圳
Upregulation of Kelch-like ECH-associated protein 1 represses the replication of herpes simplex virus type 1
Songbin WU, Lingfeng YE, Pengtao HU, Donglin XIONG, Lizu XIAO* , Rongzhen LI*
Affiliations
  • Department of Pain Medicine and Shenzhen Municipal Key Laboratory for Pain Medicine, Shenzhen Nanshan People’s Hospital, Shenzhen, Guangdong, China
出版时间: 2026-03-04 doi: 10.13343/j.cnki.wsxb.20250765
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目的 探讨Kelch样ECH相关蛋白1 (Kelch-like ECH-associated protein 1, KEAP1)对单纯疱疹病毒1型(herpes simplex virus type 1, HSV-1)复制的影响,为抗单纯疱疹病毒研究提供理论依据。 方法 通过qPCR和Western blotting试验检测人视网膜色素上皮细胞(ARPE-19细胞)感染HSV-1后KEAP1-NRF2信号通路及病毒分子的mRNA和蛋白表达情况。构建KEAP1沉默和过表达的ARPE-19细胞株,采用Western blotting检测KEAP1沉默和过表达对核因子红细胞2相关因子2 (nuclear factor erythroid 2-related factor 2, NRF2)信号通路的影响。用KEAP1沉默和过表达细胞株感染HSV-1,采用qPCR检测病毒mRNA表达变化,采用免疫荧光和Western blotting检测病毒蛋白表达变化,采用空斑形成试验检测病毒滴度变化。用KEAP1沉默细胞株感染HSV-1,采用Western blotting检测不同时间点NRF2信号通路和病毒蛋白的表达情况。 结果 KEAP1沉默可激活NRF2信号通路,促进HSV-1的复制;KEAP1过表达可下调NRF2信号通路,抑制HSV-1的复制。这一结果与先前研究中关于NRF2信号通路上调及活化可抑制HSV-1复制的结论相矛盾。进一步研究发现,KEAP1沉默诱导的NRF2上调在HSV-1感染后受到显著抑制。 结论 KEAP1在宿主细胞抗HSV-1感染过程中发挥重要作用,其与NRF2的相互作用在抗病毒免疫应答中具有复杂的生物学功能。

Kelch样ECH相关蛋白1  /  单纯疱疹病毒1型  /  核因子红细胞2相关因子2  /  病毒复制

Objective To investigate the effect of Kelch-like ECH-associated protein 1 (KEAP1) on the replication of herpes simplex virus type 1 (HSV-1) and thus provide theoretical support for anti-herpes simplex virus research. Methods The mRNA and protein levels of molecules in the KEAP1-NRF2 signaling pathway and viral molecules in ARPE-19 cells infected with HSV-1 were determined by qPCR and Western blotting, respectively. KEAP1-silenced and overexpressing ARPE-19 cell lines were constructed, and Western blotting was employed to assess the effects of KEAP1 silencing and overexpression on the nuclear factor erythroid 2-related factor 2 (NRF2) signaling pathway. The KEAP1-silenced and overexpressing cell lines were subsequently infected with HSV-1. Changes in viral mRNA expression were detected via qPCR, while immunofluorescence and Western blotting were used to evaluate alterations in viral protein expression. Additionally, a plaque formation assay was conducted to measure variations in viral titer. Western blotting was performed on KEAP1-silenced cell lines infected with HSV-1 to assess the expression levels of NRF2 signaling pathway and viral proteins at different time points. Results Silencing of KEAP1 activated the NRF2 signaling pathway and promoted HSV-1 replication, whereas KEAP1 overexpression downregulated the NRF2 signaling pathway and inhibited HSV-1 replication. These findings contradict previous studies suggesting that upregulation and activation of the NRF2 signaling pathway can suppress HSV-1 replication. Further investigation revealed that KEAP1 silencing-induced NRF2 upregulation was significantly inhibited following HSV-1 infection. Conclusion KEAP1 plays a crucial role in the host cell resistance to HSV-1 infection, and its interaction with NRF2 exerts complex biological functions in antiviral immune responses.

Kelch-like ECH-associated protein 1  /  herpes simplex virus type 1  /  nuclear factor erythroid 2-related factor 2  /  virus replication
吴松斌, 叶凌风, 胡鹏涛, 熊东林, 肖礼祖, 李容珍. 上调KelchECH相关蛋白1 (KEAP1)抑制单纯疱疹病毒1型复制. 微生物学报, 2026 , 66 (3) : 1225 -1235 . DOI: 10.13343/j.cnki.wsxb.20250765
Songbin WU, Lingfeng YE, Pengtao HU, Donglin XIONG, Lizu XIAO, Rongzhen LI. Upregulation of Kelch-like ECH-associated protein 1 represses the replication of herpes simplex virus type 1[J]. Acta Microbiologica Sinica, 2026 , 66 (3) : 1225 -1235 . DOI: 10.13343/j.cnki.wsxb.20250765
单纯疱疹病毒1型(herpes simplex virus type 1, HSV-1)是一种人类嗜神经双链DNA病毒,隶属于疱疹病毒科α病毒亚科,可引发多种疾病[1]。据报道,HSV-1感染中枢神经系统可引发单纯疱疹脑炎(herpes simplex encephalitis, HSE),其死亡率和致残率均较高[2]。越来越多的研究表明,HSV-1感染与阿尔茨海默病(Alzheimer’s disease, AD)等神经退行性疾病的发生发展存在关联[3]。此外,HSV-1感染引发的角膜炎致盲率在各类角膜病中位居首位[4]。截至目前,尽管全球研究者付出了巨大努力,但尚未找到彻底治愈HSV-1的方法[5]
Kelch样ECH相关蛋白1 (Kelch-like ECH-associated protein 1, KEAP1)是一种E3泛素连接酶的底物衔接蛋白,能够介导核因子红细胞2相关因子2 (nuclear factor erythroid 2-related factor 2, NRF2)的泛素化,并促使其随后发生蛋白酶体降解[6]。此前,大量研究聚焦于KEAP1与NRF2的相互作用,探讨其如何调控细胞的氧化还原稳态,进而影响病毒复制[7-9]。近年来,KEAP1独立于NRF2的抗病毒功能受到越来越多的关注。Burns等[10]研究发现,KEAP1可通过募集G9a-GLP和NF kappa-B p50抑制仙台病毒诱导的基因转录,且这一过程不依赖NRF2。此外,一种新发现的环状RNA被报道可通过调节miR-24-3p/KEAP1轴抑制伪狂犬病病毒复制[11]。然而,KEAP1在HSV-1感染中的作用尚不明确。本研究旨在探讨KEAP1与HSV-1感染的相互作用机制,为抗单纯疱疹病毒研究提供理论支持。
人视网膜上皮细胞(ARPE-19)、非洲绿猴肾细胞(Vero)、单纯疱疹病毒1型(herpes simplex virus type Ⅰ) (KOS株),ATCC;DMEM细胞培养基、胎牛血清、胰酶,Gibco公司;TRIzon,Life Technologies公司;反转录试剂盒,山东思科捷生物技术有限公司;NRF2、KEAP1抗体,CST公司;ICP0、gB抗体,Abcam公司;HO-1、GAPDH抗体,武汉三鹰生物技术有限公司;RealStar Fast SYBR qPCR Mix (Low ROX)、Lipofectamine 2000,北京康润诚业生物科技有限公司;puromycin、DAPI、polybrene,翌圣生物科技(上海)股份有限公司;pLVX-GFP-PURO-KEAP1 (KEAP1过表达)、pLKO-CMV-copGFP-PURO-shKEAP1 (沉默KEAP1)质粒、相应的空载质粒,北京擎科生物科技股份有限公司。
使用Lipofectamine 2000、慢病毒载体(2 μg)、包装质粒pMD2.G (1 μg)和psPAX2 (1 μg)转染HEK 293T细胞以制备慢病毒颗粒。转染24 h至48 h后,收集细胞培养基,4 ℃、4 000 r/min离心10 min取上清液。为获得稳定沉默或过表达KEAP1的细胞株,将ARPE-19细胞接种于6孔细胞培养板中,每孔4×105个细胞。待细胞贴壁后,将含有8 μg/mL polybrene的慢病毒悬液加入ARPE-19细胞中。慢病毒感染24 h后,在荧光显微镜下观察细胞表达荧光标签蛋白的情况,随后弃去原培养液,更换为含有2 μg/mL puromycin的新鲜培养液以筛选阳性细胞株。持续培养2周后,更换为不含puromycin的完全培养基,采用qPCR和Western blotting检测细胞株中KEAP1的表达情况,最终获得的稳转细胞株将用于后续实验。
使用TRIzon试剂提取细胞总RNA,并通过反转录试剂盒获得cDNAs。qPCR检测采用北京康润诚业生物科技有限公司的2×RealStar Fast SYBR qPCR Mix (Low ROX)进行,以GAPDH作为内参,目的基因的相对表达水平采用2-ΔΔCt法分析计算。所有引物序列均由北京擎科生物科技股份有限公司合成,引物序列如表1所示。
不同处理组的细胞用RIPA细胞裂解液在冰上裂解30 min,5 000 r/min离心10 min收集上清液,并使用BCA蛋白检测试剂盒测定上清液中的总蛋白浓度。蛋白质经SDS-PAGE分离后转移到PVDF膜上,然后使用5%脱脂牛奶室温封闭2 h,一抗于4 ℃孵育过夜,二抗室温孵育1 h后进行ECL法曝光以获得目的蛋白条带。利用ImageJ软件分析蛋白条带灰度并进行定量。
将分别转染KEAP1过表达载体、KEAP1沉默载体及对照空载载体的ARPE-19细胞株接种于12孔板中,待细胞贴壁后,加入HSV-1 (MOI=0.02)吸附2 h后弃上清液,用PBS洗涤细胞3次后加入新鲜培养基,置于细胞培养箱培养。24 h后弃上清液,用4% PFA固定细胞,随后加入免疫荧光封闭液室温封闭1 h,弃封闭液后向细胞中加入ICP0或gB抗体于4 ℃孵育过夜。第2天,用PBS洗涤细胞3次后,孵育Alexa Fluor 594 (红色)偶联山羊抗小鼠IgG H&L二抗,最后用DAPI染色8 min后置于荧光显微镜下拍照。
将分别转染KEAP1过表达载体、KEAP1沉默载体及对照空载载体的ARPE-19细胞株按每孔2×105个接种于6孔板,待细胞完全贴壁后,加HSV-1 (MOI=0.02)吸附2 h后弃上清液,更换新鲜培养基后置于细胞培养箱培养,24 h后收集上清液。将收集的病毒上清液作连续6个梯度的稀释(100 μL病毒液加到400 μL培养基中),每个稀释度设置3孔,重复3次。将不同稀释梯度的病毒液加入长满单层的Vero细胞中,37 ℃吸附2 h后弃病毒液,用PBS轻轻洗涤细胞3遍并吸尽,加入甲基纤维-DMEM混合物,48 h后,用4% PFA固定20 min,1%结晶紫染色30 min,拍照并计数空斑。病毒滴度计算如公式(1)所示。
病毒滴度=(x1+x2+......+xn )/(n×vd
式中:n表示复孔个数,v表示病毒量(mL),d表示稀释倍数。x1x2xn 表示同一稀释度在不同培养孔板中获得的空斑数。
使用Excel软件进行数据整理,使用GraphPad Prism 8.0软件进行统计学分析和绘图。计量资料采用均值±标准差表示,两组间比较采用t检验,多组比较运用one‐way ANOVA分析,P<0.05表示差异具有统计学意义。
使用MOI=0.02的HSV-1感染ARPE-19细胞,待病毒感染24 h和36 h后收集细胞,通过qPCR检测不同时间点KEAP1-NRF2信号通路和病毒基因的表达情况。结果显示,HSV-1感染后KEAP1表达显著降低,NRF2HO-1表达无显著差异、病毒即刻早期(IE)基因ICP0[12]、糖蛋白g编码基因US4[13]和潜伏期相关基因LAT[14]表达显著增加(图1A)。为了进一步探究HSV-1感染对KEAP1-NRF2信号通路和病毒蛋白表达的影响,通过Western blotting检测HSV-1感染后KEAP1、NRF2、HO-1、病毒即刻早期蛋白ICP0和包膜糖蛋白gB的表达水平。结果显示,HSV-1感染后病毒蛋白ICP0和gB表达显著增加,KEAP1蛋白表达显著降低,NRF2和HO-1蛋白表达无显著差异(图1B)。
为了探究KEAP1下调对HSV-1复制的影响,设计了3个特异性靶向KEAP1的shRNAs来沉默KEAP1,并通过qPCR和Western blotting验证KEAP1的敲低水平(图2A2B),最终选择敲低效率最高的细胞株shKEAP1(1)开展后续实验。shcontrol与shKEAP1(1)细胞株分别感染HSV-1 24 h后,采用qPCR检测细胞中病毒mRNA表达水平。结果显示,shKEAP1(1)组ICP0US4LAT的转录水平显著高于shcontrol组(图2C)。进一步使用免疫荧光和Western blotting探究病毒蛋白表达情况,结果表明KEAP1敲低促进了HSV-1蛋白ICP0和gB表达(图2D2E)。随后收集病毒感染24 h后的shcontrol组和shKEAP1(1)组细胞的上清,利用DMEM培养基梯度稀释后感染Vero细胞,通过细胞病变形成的空斑数量探究所释放的子代病毒颗粒数量。结果显示,shKEAP1(1)组病毒滴度与shcontrol组比较显著增加(图2F)。上述结果表明,抑制KEAP1可以促进HSV-1病毒复制。
为了进一步探究KEAP1在HSV-1复制中的功能,构建了KEAP1过表达ARPE-19细胞株,并通过qPCR和Western blotting进行KEAP1表达验证(图3A-3B)。与对照组(vector)相比,KEAP1过表达可显著下调病毒基因ICP0US4LAT的转录水平(图3C)。免疫荧光和Western blotting实验显示,与对照组相比,KEAP1过表达显著抑制病毒蛋白ICP0和gB的表达(图3D-3E)。利用空斑实验进一步评估HSV-1感染后对照组和KEAP1过表达组细胞上清中病毒粒子释放情况,结果显示KEAP1过表达组病毒滴度显著低于对照组(图3F)。上述结果表明KEAP1在细胞中参与抗HSV-1感染。
NRF2是动物细胞氧化还原稳态的关键调节因子[15]。在正常生理条件下,NRF2与细胞质中的KEAP1结合,最终被蛋白酶体降解。在应激状态下,NRF2从KEAP1释放并易位至细胞核,与肌腱膜纤维肉瘤(musculoaponeurotic fibrosarcoma, MAF)蛋白形成异源二聚体,NRF2-MAF复合物进一步与抗氧化反应元件(antioxidant response elements, ARE)结合,启动细胞保护基因的转录,如血红素氧合酶-1 (heme oxygenase-1, HO-1)[16]。有研究报道,NRF2-HO-1通路可通过激活干扰素抑制HSV-1感染[7];最新研究也证实,NRF2过表达能够抑制HSV-1复制,且发现NRF2介导的抗HSV-1作用不依赖HO-1[17]。因此,本研究进一步探究了KEAP1沉默和过表达对NRF2和HO-1表达的影响,结果显示KEAP1沉默上调NRF2和HO-1表达(图4A),促进HSV-1复制(图2C-2F);而KEAP1过表达抑制NRF2和HO-1表达(图4B),抑制HSV-1复制(图3C-3F)。这与之前研究报道的NRF2、HO-1上调抑制HSV-1的现象相矛盾。因此,推测KEAP1介导的抗HSV-1作用不依赖于NRF2-HO-1信号通路。
为进一步探究KEAP1介导的抗HSV-1作用是否独立于NRF2-HO-1信号通路,本研究在KEAP1沉默细胞株(具有高基础NRF2表达水平)中建立了HSV-1感染模型,并检测了感染后不同时间点NRF2蛋白的动态变化。实验结果表明,HSV-1感染后原本显著升高的NRF2蛋白水平迅速下调(图5),提示病毒可能通过某种机制降解NRF2,从而逃逸宿主的抗氧化与固有免疫应答。在病毒感染条件下,尽管NRF2表达被显著抑制,但HO-1的表达水平并未受到明显影响(图5)。据此推测KEAP1-NRF2信号通路在抗病毒免疫中可能发挥复杂的调控作用。
KEAP1是一种E3泛素连接酶的底物衔接物,能够介导NRF2泛素化并使其降解[6]。本研究发现HSV-1感染抑制了ARPE-19细胞中KEAP1的表达(图1),但KEAP1在HSV-1感染过程中的作用尚不明确。因此,本研究探究了KEAP1与HSV-1复制之间的相互作用。
为了探究KEAP1对HSV-1病毒复制的影响,本研究构建了KEAP1沉默和过表达的ARPE-19细胞株,并使其感染HSV-1。结果显示,KEAP1抑制可以显著促进HSV-1病毒复制和释放(图2),而KEAP1过表达可以抑制HSV-1病毒复制和释放(图3)。此外,研究发现KEAP1过表达显著抑制病毒蛋白gB的表达,对病毒蛋白ICP0的抑制作用不强(图3D3E)。ICP0蛋白是一种即刻早期蛋白,可使宿主内在防御蛋白失活并刺激病毒转录[18]。gB是HSV-1的主要包膜糖蛋白,在gD和gH/gL复合物的辅助下,通过介导病毒与细胞或细胞膜的融合促进HSV-1的侵袭和核衣壳的释放[19]。这些实验结果表明,KEAP1可能主要通过调控HSV-1包膜糖蛋白gB表达来干扰HSV-1的复制和释放,具体机制有待进一步研究。
大量研究报道了KEAP1-NRF2信号通路参与病毒感染,如KEAP1通过识别HBX蛋白激活NRF2/ARE信号通路,进而抑制乙型肝炎病毒的复制[20];马尔堡病毒VP24蛋白与KEAP1相互作用,调控NRF2信号通路,进而激活细胞保护性抗氧化反应途径[21]。NRF2是一种调节抗氧化基因表达的转录因子[22]。NRF2过表达或者激活被报道可以抑制HSV-1病毒复制[7],Wu等[17]的研究中也得到了一致的结果。NRF2可以易位进入细胞核并与ARE结合,启动细胞保护基因的转录,如HO-1[16]。然而,ARPE-19细胞感染HSV-1后,NRF2及其下游效应物HO-1的表达并未出现显著变化(图1),表明在ARPE-19细胞中HSV-1感染对NRF2的表达或核转移无显著影响。进一步的研究发现,KEAP1沉默上调NRF2及其下游通路表达,KEAP1过表达抑制NRF2及其下游通路表达(图4)。然而KEAP1过表达表现出抗HSV-1特性的同时却抑制了NRF2通路活性,KEAP1沉默促进HSV-1复制(图2图3)的同时又激活NRF2通路。据此推测KEAP1介导的抗HSV-1效果可能独立于NRF2-HO-1信号通路。
为探究KEAP1介导的抗HSV-1效应是否独立于NRF2-HO-1信号通路,研究继续在KEAP1沉默细胞模型中进行了HSV-1感染实验,并检测了NRF2信号通路关键分子的表达变化。结果显示,HSV-1感染能够显著抑制由KEAP1沉默所引起的NRF2表达上调(图5),而对NRF2下游蛋白HO-1的表达无显著影响(图5),提示HSV-1可能通过靶向NRF2实现免疫逃逸。值得注意的是,这一结果与图1所示数据,即HSV-1感染对正常ARPE-19细胞中NRF2表达未产生显著影响存在不一致之处。进一步对Western blotting结果进行分析发现,在KEAP1沉默条件下诱导上调的NRF2蛋白分子量约为100 kDa,而在未经KEAP1干预的ARPE-19细胞中NRF2主要呈现为约75 kDa的条带。这一现象表明,细胞内NRF2可能以不同分子量形式存在,且不同形式的NRF2在HSV-1感染过程中可能承担不同的生物学功能。
  • 深圳市南山区技术研发和创意设计项目(NS2023041)
  • 深圳市南山区技术研发和创意设计项目(NS2024033)
  • 深圳市南山区卫生健康系统科技重大项目(NSZD2024029)
  • 深圳市医学重点学科建设项目(市级财政补贴)
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2026年第66卷第3期
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doi: 10.13343/j.cnki.wsxb.20250765
  • 接收时间:2025-10-13
  • 首发时间:2026-03-12
  • 出版时间:2026-03-04
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  • 收稿日期:2025-10-13
  • 录用日期:2025-12-16
基金
Science and Technology Major Project of Shenzhen Nanshan District Health System(NS2023041)
深圳市南山区技术研发和创意设计项目(NS2023041)
Science and Technology Major Project of Shenzhen Nanshan District Health System(NS2024033)
深圳市南山区技术研发和创意设计项目(NS2024033)
Shenzhen Nanshan District Healthcare System Science and Technology Key Project(NSZD2024029)
深圳市南山区卫生健康系统科技重大项目(NSZD2024029)
Municipal Financial Subsidy of Shenzhen Medical Key Discipline Construction
深圳市医学重点学科建设项目(市级财政补贴)
作者信息
    深圳市南山区人民医院疼痛科,深圳市疼痛学重点实验室,广东 深圳

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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
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栓菌属 Trametes 5 2.39
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