Article(id=1307013309065089741, tenantId=1146029695717560320, journalId=1306274286668972124, issueId=1307013104081068276, articleNumber=null, orderNo=null, doi=10.11843/j.issn.0366-6964.2026.02.031, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1748275200000, receivedDateStr=2025-05-27, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1789545856013, onlineDateStr=2026-09-16, pubDate=1771776000000, pubDateStr=2026-02-23, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1789545856013, onlineIssueDateStr=2026-09-16, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1789545856013, creator=13701087609, updateTime=1789545856013, updator=13701087609, issue=Issue{id=1307013104081068276, tenantId=1146029695717560320, journalId=1306274286668972124, year='2026', volume='57', issue='2', pageStart='569', pageEnd='1176', issueExtLink='null', onlineDate='null', pubDate='1771776000000', pubDateStr='2026-02-23', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1789545807142, creator='13701087609', updateTime=1789609910854, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1307281975350419753, tenantId=1146029695717560320, journalId=1306274286668972124, issueId=1307013104081068276, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1307281975350419754, tenantId=1146029695717560320, journalId=1306274286668972124, issueId=1307013104081068276, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=945, endPage=954, ext={EN=ArticleExt(id=1307013309270610638, articleId=1307013309065089741, tenantId=1146029695717560320, journalId=1306274286668972124, language=EN, title=Functional Analysis of lncRNA663 Regulating CLDN10 Expression and Porcine Epidemic Diarrhea Virus Replication, columnId=1307007432299930010, journalTitle=Acta Veterinaria et Zootechnica Sinica, columnName=PREVENTIVE VETERINARY MEDICINE, runingTitle=null, highlight=null, articleAbstract=

Porcine epidemic diarrhea virus (PEDV) is a coronavirus that causes acute diarrhea, vomiting, and dehydration in piglets, among other clinical signs, and has caused severe economic losses to the global swine farming industry. More and more studies have reported that long non-coding RNAs (lncRNAs) play important regulatory roles in porcine coronaviruses, however, the role and mechanism of lncRNA 663 in PEDV infection remain unclear. Based on prior transcriptome sequencing, we identified a co-expression pattern between lncRNA 663 and the tight junction protein CLDN10. This study aimed to explore their roles and regulatory relationship during PEDV infection. The qRT-PCR and Western blot results showed that the expression levels of lncRNA 663 and CLDN10 were up-regulated after PEDV infection of IPEC-J2 cells (P<0.05), DSS treatment significantly reduced the expression levels of lncRNA 663 and CLDN10 (P<0.05). Subcellular localization prediction revealed that lncRNA 663 was mainly localized in the cytoplasm, and RPISeq prediction revealed that lncRNA663 and CLDN10 were highly interoperable (SVM: 0.98, RF: 0.8). Functional experiments demonstrated that siRNA-mediated knockdown of lncRNA 663 led to a significant decrease in both CLDN10 expression and PEDV replication (P<0.05). Furthermore, structure prediction using AlphaFold3 and ChimeraX revealed potential hydrogen bond interactions between CLDN10 and the PEDV spike (S) protein, suggesting a role in viral entry or infection. Collectively, these results suggest that lncRNA 663 may promote PEDV replication by regulating CLDN10 expression. These findings expand our understanding of PEDV-host interactions and provide a theoretical basis for future antiviral strategies targeting host non-coding RNAs.

, authors=Zuolin WU, Haijiang LIANG, Zheyu WU, Songbai YANG, Ayong ZHAO, Weiyun QIN, authorsList=Zuolin WU, Haijiang LIANG, Zheyu WU, Songbai YANG, Ayong ZHAO, Weiyun QIN, authorCompany=null, correspAuthors=Weiyun QIN, authorNote=null, correspAuthorsNote=
QIN Weiyun, E-mail:
, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1307013310696674011, articleId=1307013309065089741, tenantId=1146029695717560320, journalId=1306274286668972124, language=CN, title=lncRNA663调控CLDN10表达及猪流行性腹泻病毒复制的功能分析, columnId=1307007432459313564, journalTitle=畜牧兽医学报, columnName=预防兽医, runingTitle=null, highlight=null, articleAbstract=

猪流行性腹泻病毒(porcine epidemic diarrhea virus, PEDV)是一种引起仔猪急性腹泻、呕吐及脱水等临床症状的冠状病毒,对全球猪养殖业造成了严重的经济损失。越来越多的研究报道长链非编码RNA(lncRNA)在猪冠状病毒中发挥着重要的调控作用,然而,关于lncRNA663在PEDV感染中的调控作用和机制研究尚未有相关报道。基于前期高通量转录组数据分析,笔者发现lncRNA 663与紧密连接蛋白CLDN10具有共表达趋势,因此本研究以lncRNA 663和CLDN10为试验对象,探索其在PEDV感染中的调控作用。本研究qRT-PCR和Western blot结果显示,PEDV感染IPEC-J2细胞后上调了lncRNA 663和CLDN10的表达水平(P<0.05),DSS处理则显著降低了lncRNA 663和CLDN10的表达水平(P<0.05)。亚细胞定位预测发现lncRNA 663主要定位于细胞质,RPISeq预测发现lncRNA663和CLDN10高度互作(SVM:0.98,RF:0.8);功能试验结果显示,siRNAs敲低lncRNA 663后,CLDN10的mRNA和蛋白表达水平显著下降,PEDV复制水平亦同步降低(P<0.05)。进一步通过AlphaFold3和ChimeraX进行结构预测,发现CLDN10可能与PEDV S蛋白形成7个氢键结合位点,提示其可能参与病毒侵染过程。综上所述,本研究初步揭示lncRNA 663通过调控CLDN10表达促进PEDV复制的可能机制,为深入解析病毒与宿主非编码RNA互作关系及干预靶点提供参考。

, authors=吴作林, 梁海江, 吴哲豫, 杨松柏, 赵阿勇, 钦伟云, authorsList=吴作林, 梁海江, 吴哲豫, 杨松柏, 赵阿勇, 钦伟云, authorCompany=null, correspAuthors=钦伟云, authorNote=

吴作林,主要从事猪抗病育种研究,E-mail:

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钦伟云,主要从事猪抗病育种研究,E-mail:
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A,et al.Long noncoding RNAs (lncRNAs) dynamics evidence immunomodulation during ISAV-Infected Atlantic salmon (Salmo salar)[J].Sci Rep,2016,6:22698., articleTitle=null, refAbstract=null), Reference(id=1307282330696044753, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013309065089741, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[28], rfOrder=41, authorNames=null, journalName=null, refType=null, unstructuredReference=张富豪.基于序列的蛋白质结合位点预测方法研究 [D].长沙:中南大学,2023., articleTitle=null, refAbstract=null), Reference(id=1307282330813485266, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013309065089741, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[28], rfOrder=42, authorNames=null, journalName=null, refType=null, unstructuredReference=ZHANG F H.Sequence-based predictors for protein binding sites[D].Changsha:Central South University,2023.(in Chinese), articleTitle=null, refAbstract=null)], funds=[Fund(id=1307282324844990630, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013309065089741, awardId=ZCLQN25C1702, language=CN, fundingSource=浙江省自然科学基金青年科学基金项目(ZCLQN25C1702), fundOrder=null, country=null), Fund(id=1307282324937265319, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013309065089741, awardId=2024LFR035, language=CN, fundingSource=浙江农林大学人才启动项目(2024LFR035), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1307282317114888303, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013309065089741, xref=null, ext=[AuthorCompanyExt(id=1307282317186191472, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013309065089741, companyId=1307282317114888303, language=EN, country=null, province=null, city=null, postcode=null, 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A. Transcription level of lncRNA663 at different time points after PEDV treatment; B. Transcription level of CLDN10 at different time points after PEDV treatment; C. Western blot analysis of CLDN10 expression levels 24 h after PEDV infection; D. Transcription level of lncRNA663 at different time points after DSS treatment; E. Transcription level of CLDN10 at different time points after DSS treatment; F. Western blot analysis of CLDN10 expression levels 24 h after DSS treatment

, figureFileSmall=Iwi4H0RDalfi56GzWUHuyQ==, figureFileBig=wnX59oh8gNW9+k0RcHddcQ==, tableContent=null), ArticleFig(id=1307282321942532249, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013309065089741, language=CN, label=图1, caption=PEDV感染和DSS处理猪小肠上皮细胞中lncRNA 663和CLDN10的表达水平变化

A. PEDV处理不同时间点lncRNA663的转录水平;B. PEDV处理不同时间点CLDN10的转录水平;C. Western blot检测PEDV感染24 h后CLDN10的表达水平;D. DSS处理不同时间点lncRNA663的转录水平;E. DSS处理不同时间点CLDN10的转录水平;F. Western blot检测DSS处理24 h后CLDN10的表达水平

, figureFileSmall=Iwi4H0RDalfi56GzWUHuyQ==, figureFileBig=wnX59oh8gNW9+k0RcHddcQ==, tableContent=null), ArticleFig(id=1307282322047389850, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013309065089741, language=EN, label=Fig.2, caption=Prediction of subcellular localization of lncRNA 663 and interaction with CLDN10

A. Prediction of subcellular localization of lncRNA663; B. Interaction prediction of lncRNA663 and CLDN10

, figureFileSmall=sAi5RvwrYF3OaKr/K9VE6w==, figureFileBig=YT6rqnrb84fYOTYK3L1GfA==, tableContent=null), ArticleFig(id=1307282322127081627, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013309065089741, language=CN, label=图2, caption=lncRNA663亚细胞定位预测和与CLDN10互作预测

A. lncRNA亚细胞定位预测;B. lncRNA663和CLDN10互相作用预测

, figureFileSmall=sAi5RvwrYF3OaKr/K9VE6w==, figureFileBig=YT6rqnrb84fYOTYK3L1GfA==, tableContent=null), ArticleFig(id=1307282322202579100, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013309065089741, language=EN, label=Fig.3, caption=Real-time PCR was used to detect lncRNA interference efficiency

The same letters indicate no significant difference (P>0.05),different letters indicate significant difference (P<0.05). The same as below

, figureFileSmall=WbXR2/TCIzY92BhzAoJ24g==, figureFileBig=uKlzATLOvI3y+/4R7I9gvA==, tableContent=null), ArticleFig(id=1307282322273882269, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013309065089741, language=CN, label=图3, caption=实时荧光定量PCR检测lncRNA干扰效率

相同字母表示差异不显著(P>0.05),不同字母表示差异显著(P<0.05)。下同

, figureFileSmall=WbXR2/TCIzY92BhzAoJ24g==, figureFileBig=uKlzATLOvI3y+/4R7I9gvA==, tableContent=null), ArticleFig(id=1307282322361962654, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013309065089741, language=EN, label=Fig.4, caption=The effect of lncRNA663 interference on CLDN10 expression and PEDV infection

A. Relative transcription levels of CLDN10 after interference; B. Relative transcription levels of PEDV M after interference; C. Changes in the expression of CLDN10 and PEDV N protein after interference

, figureFileSmall=w7iuBGTPtE3t3mfamIPE7Q==, figureFileBig=Vt5c7rbCkodnSKJqGRlapA==, tableContent=null), ArticleFig(id=1307282324069044383, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013309065089741, language=CN, label=图4, caption=lncRNA663干扰对CLDN10表达和PEDV 感染的影响

A.干扰后CLDN10相对转录水平;B.干扰后PEDV M相对转录水平;C.干扰后CLDN10和PEDV N蛋白的表达变化

, figureFileSmall=w7iuBGTPtE3t3mfamIPE7Q==, figureFileBig=Vt5c7rbCkodnSKJqGRlapA==, tableContent=null), ArticleFig(id=1307282324152930464, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013309065089741, language=EN, label=Fig.5, caption=Prediction of hydrogen bonding sites for CLDN10 protein and PEDV S protein

A. Three-dimensional visualization of the AlphaFold-predicted protein complex using ChimeraX 1.9; B. Zoomed-in view of the hydrogen bond interactions between key residues. CLDN10 for pink, PEDV S for blue

, figureFileSmall=G/HntZ5LzZkXNxA+UClWGQ==, figureFileBig=IclhuEJl3UZlfUeJ1jylQQ==, tableContent=null), ArticleFig(id=1307282324232622241, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013309065089741, language=CN, label=图5, caption=CLDN10蛋白质和PEDV S蛋白质氢键结合位点预测

A. 利用ChimeraX 1.9对AlphaFold预测的蛋白复合物整体结构进行三维可视化;B.预测关键残基之间的氢键相互作用。粉色为CLDN10;蓝色为PEDV S

, figureFileSmall=G/HntZ5LzZkXNxA+UClWGQ==, figureFileBig=IclhuEJl3UZlfUeJ1jylQQ==, tableContent=null), ArticleFig(id=1307282324333285538, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013309065089741, language=EN, label=Table 1, caption=

Real-time fluorescent quantitative PCR primer sequence

, figureFileSmall=null, figureFileBig=null, tableContent=

基因

Genes

引物序列(5'→3')

Primer sequences

产物长度/bp

Length

lncRNA663

F: GGACCTCCGGAGCTGTTTTA

R: CTTGTGCGTCGCAAACCAA

123
PEDV M

F:AGGTCTGCATTCCAGTGCTT

R:GGACATAGAAAGCCCAACCA

216
CLDN10

F: ACGGCGTCGGAGATCATTG

R: ATGCCTGGATATAACCGTCCAG

226
GAPDH

F: ACATCATCCCTGCTTCTACTGG

R: CTCGGACGCCTGCTTCAC

188
), ArticleFig(id=1307282324425560227, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013309065089741, language=CN, label=表1, caption=

实时荧光定量PCR引物序列

, figureFileSmall=null, figureFileBig=null, tableContent=

基因

Genes

引物序列(5'→3')

Primer sequences

产物长度/bp

Length

lncRNA663

F: GGACCTCCGGAGCTGTTTTA

R: CTTGTGCGTCGCAAACCAA

123
PEDV M

F:AGGTCTGCATTCCAGTGCTT

R:GGACATAGAAAGCCCAACCA

216
CLDN10

F: ACGGCGTCGGAGATCATTG

R: ATGCCTGGATATAACCGTCCAG

226
GAPDH

F: ACATCATCCCTGCTTCTACTGG

R: CTCGGACGCCTGCTTCAC

188
), ArticleFig(id=1307282324530417828, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013309065089741, language=EN, label=Table 2, caption=

Sequence information of siRNAs

, figureFileSmall=null, figureFileBig=null, tableContent=
siRNAs

序列(5′→3′)

Sequences

siRNA-1

F: GGAUCGAGCUGCUCAUCAUTT

R: AUGAUGAGCAGCUCGAUCCTT

siRNA-2

F: CCUUCUCACCUCUGUUUAUTT

R: AUAAACAGAGGUGAGAAGGTT

siRNA-3

F: GCGACACUCGUGAAACUAATT

R: UUAGUUUCACGAGUGUCGCTT

NC

F: UUCUCCGAAACGUGUCACGUTT

R: ACGUGACACGUUCGGAGAATT

), ArticleFig(id=1307282324643664037, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013309065089741, language=CN, label=表2, caption=

siRNAs序列信息

, figureFileSmall=null, figureFileBig=null, tableContent=
siRNAs

序列(5′→3′)

Sequences

siRNA-1

F: GGAUCGAGCUGCUCAUCAUTT

R: AUGAUGAGCAGCUCGAUCCTT

siRNA-2

F: CCUUCUCACCUCUGUUUAUTT

R: AUAAACAGAGGUGAGAAGGTT

siRNA-3

F: GCGACACUCGUGAAACUAATT

R: UUAGUUUCACGAGUGUCGCTT

NC

F: UUCUCCGAAACGUGUCACGUTT

R: ACGUGACACGUUCGGAGAATT

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lncRNA663调控CLDN10表达及猪流行性腹泻病毒复制的功能分析
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吴作林 , 梁海江 , 吴哲豫 , 杨松柏 , 赵阿勇 , 钦伟云
畜牧兽医学报 | 预防兽医 2026,57(2): 945-954
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畜牧兽医学报 |预防兽医 2026 , 57 (2) : 945 -954
lncRNA663调控CLDN10表达及猪流行性腹泻病毒复制的功能分析
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吴作林 , 梁海江, 吴哲豫, 杨松柏, 赵阿勇, 钦伟云
作者信息
  • 浙江农林大学动物科技学院·动物医学院,杭州 311300
通讯作者:
钦伟云,主要从事猪抗病育种研究,E-mail:
作者简介:

吴作林,主要从事猪抗病育种研究,E-mail:

Functional Analysis of lncRNA663 Regulating CLDN10 Expression and Porcine Epidemic Diarrhea Virus Replication
Zuolin WU , Haijiang LIANG, Zheyu WU, Songbai YANG, Ayong ZHAO, Weiyun QIN
Affiliations
  • College of Animal Science and Technology·College of Veterinary Medicine,Zhejiang A&F University,Hangzhou 311300,China
  • Corresponding Author:
    QIN Weiyun, E-mail:
出版时间: 2026-02-23 doi: 10.11843/j.issn.0366-6964.2026.02.031
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猪流行性腹泻病毒(porcine epidemic diarrhea virus, PEDV)是一种引起仔猪急性腹泻、呕吐及脱水等临床症状的冠状病毒,对全球猪养殖业造成了严重的经济损失。越来越多的研究报道长链非编码RNA(lncRNA)在猪冠状病毒中发挥着重要的调控作用,然而,关于lncRNA663在PEDV感染中的调控作用和机制研究尚未有相关报道。基于前期高通量转录组数据分析,笔者发现lncRNA 663与紧密连接蛋白CLDN10具有共表达趋势,因此本研究以lncRNA 663和CLDN10为试验对象,探索其在PEDV感染中的调控作用。本研究qRT-PCR和Western blot结果显示,PEDV感染IPEC-J2细胞后上调了lncRNA 663和CLDN10的表达水平(P<0.05),DSS处理则显著降低了lncRNA 663和CLDN10的表达水平(P<0.05)。亚细胞定位预测发现lncRNA 663主要定位于细胞质,RPISeq预测发现lncRNA663和CLDN10高度互作(SVM:0.98,RF:0.8);功能试验结果显示,siRNAs敲低lncRNA 663后,CLDN10的mRNA和蛋白表达水平显著下降,PEDV复制水平亦同步降低(P<0.05)。进一步通过AlphaFold3和ChimeraX进行结构预测,发现CLDN10可能与PEDV S蛋白形成7个氢键结合位点,提示其可能参与病毒侵染过程。综上所述,本研究初步揭示lncRNA 663通过调控CLDN10表达促进PEDV复制的可能机制,为深入解析病毒与宿主非编码RNA互作关系及干预靶点提供参考。

猪流行性腹泻病毒  /  长链非编码RNA  /  CLDN10  /  肠道屏障

Porcine epidemic diarrhea virus (PEDV) is a coronavirus that causes acute diarrhea, vomiting, and dehydration in piglets, among other clinical signs, and has caused severe economic losses to the global swine farming industry. More and more studies have reported that long non-coding RNAs (lncRNAs) play important regulatory roles in porcine coronaviruses, however, the role and mechanism of lncRNA 663 in PEDV infection remain unclear. Based on prior transcriptome sequencing, we identified a co-expression pattern between lncRNA 663 and the tight junction protein CLDN10. This study aimed to explore their roles and regulatory relationship during PEDV infection. The qRT-PCR and Western blot results showed that the expression levels of lncRNA 663 and CLDN10 were up-regulated after PEDV infection of IPEC-J2 cells (P<0.05), DSS treatment significantly reduced the expression levels of lncRNA 663 and CLDN10 (P<0.05). Subcellular localization prediction revealed that lncRNA 663 was mainly localized in the cytoplasm, and RPISeq prediction revealed that lncRNA663 and CLDN10 were highly interoperable (SVM: 0.98, RF: 0.8). Functional experiments demonstrated that siRNA-mediated knockdown of lncRNA 663 led to a significant decrease in both CLDN10 expression and PEDV replication (P<0.05). Furthermore, structure prediction using AlphaFold3 and ChimeraX revealed potential hydrogen bond interactions between CLDN10 and the PEDV spike (S) protein, suggesting a role in viral entry or infection. Collectively, these results suggest that lncRNA 663 may promote PEDV replication by regulating CLDN10 expression. These findings expand our understanding of PEDV-host interactions and provide a theoretical basis for future antiviral strategies targeting host non-coding RNAs.

porcine epidemic diarrhea virus  /  long chain non-coding RNA  /  CLDN10  /  intestinal barrier
吴作林, 梁海江, 吴哲豫, 杨松柏, 赵阿勇, 钦伟云. lncRNA663调控CLDN10表达及猪流行性腹泻病毒复制的功能分析. 畜牧兽医学报, 2026 , 57 (2) : 945 -954 . DOI: 10.11843/j.issn.0366-6964.2026.02.031
Zuolin WU, Haijiang LIANG, Zheyu WU, Songbai YANG, Ayong ZHAO, Weiyun QIN. Functional Analysis of lncRNA663 Regulating CLDN10 Expression and Porcine Epidemic Diarrhea Virus Replication[J]. Acta Veterinaria et Zootechnica Sinica, 2026 , 57 (2) : 945 -954 . DOI: 10.11843/j.issn.0366-6964.2026.02.031
猪流行性腹泻(porcine epidemic diarrhea, PED)是由猪流行性腹泻病毒(porcine epidemic diarrhea virus, PEDV)引起的一种急性、高度接触性传染的肠道疾病。PEDV主要感染猪小肠绒毛上皮细胞[1],7日龄以下哺乳仔猪感染症状严重,出现呕吐、腹泻、脱水等症状,死亡率可达到100%[2]。免疫接种是目前防控PED 的主要策略,然而PEDV的快速变异导致疫苗难以对所有变异株提供有效保护[3]。目前,PEDV的感染与致病机制尚未完全解析,这在很大程度上制约了有效防控措施的研发[4]。因此,从宿主角度深入研究PEDV的感染与复制机制,对于阐明其致病过程并寻找新的防控靶点具有重要意义,已成为当前病毒研究的热点方向。
长链非编码RNA(long non-coding RNAs, lncRNAs)是一种长度大于200个核苷酸的非编码RNA分子,在基因表达调控、细胞分化、肌肉发育及疾病发生等多个生物过程中发挥重要作用。近年来,lncRNAs在病毒感染过程中所发挥的调控作用逐渐受到关注[5⁃6],已有研究涉及其在PEDV感染宿主细胞中的作用机制[7⁃11]。研究表明,PEDV感染猪回肠组织后lncRNA表达谱的变化,并发现部分lncRNA可能与PEDV致病机制相关[8]。除此之外,燕苗苗等[9]研究报道了lncRNA9606在PEDV感染猪肠上皮细胞后可以显著上调表达并抑制PEDV的复制。黄东璋等[10]研究系统验证了lncRNA LOC102157897和PEDV感染的关系,表明其表达水平下调利于提高宿主细胞对PEDV感染的抵抗力。余昕雅[11]研究发现lncRNA18850是调控PEDV复制的重要因子,参与核因子κB(nuclear factor kappa-B,NF-κB)信号通路促进病毒复制。此外,PEDV感染可上调Vero-E6细胞内lncRNA 18850的表达,lncRNA 18850可能通过靶向调控多个基因而促进病毒的复制[12]。
CLDN10(claudin 10)蛋白是细胞膜骨架蛋白之一,是细胞间紧密连接(tight junction,TJ)的重要构成部分[13]。TJ是维持细胞结构以及细胞间连接和细胞间作用的重要通道。CLDN10的功能不仅仅是作为细胞间紧密连接的结构成分,还参与调节离子和水分的跨细胞运输,是细胞间屏障的关键组成部分[14]。目前关于CLDN10的研究较少,多集中在癌症领域,研究表明,CLDN10的表达异常或功能失调与人体肿瘤的发生和进展有密切关系[15]。CLDN10在猪中的研究仍较为匮乏,有待于进一步探究。
尽管目前已有研究初步揭示lncRNA在PEDV感染宿主过程中的调控作用,但lncRNA与其靶向宿主蛋白之间的具体互作机制尚缺乏系统研究。基于前期高通量测序数据,笔者发现lncRNA 663与紧密连接蛋白CLDN10在PEDV感染过程中呈共表达趋势,提示二者可能存在功能关联。为了进一步研究lncRNA663是否通过调控CLDN10的表达进而影响PEDV的复制,本研究在猪小肠上皮细胞(intestinal porcine epithelial cell line-J2,IPEC-J2)细胞中构建lncRNA 663干扰模型,对其功能机制进行了初步的探讨,本研究有助于阐明宿主lncRNA调控PEDV感染的功能机制,为新型抗病毒策略及遗传抗性育种提供理论支持。
IPEC-J2细胞系为本实验室保存,采用含有10%FBS、1%青链霉素的DMEM(Dulbecco’s modification of Eagle’s medium)培养基培养。PEDV CV777毒株由本实验室分离保存,接种细胞后用含5 μg∙mL-1胰酶的DMEM培养扩毒。
将猪小肠上皮细胞(IPEC-J2)放入含有10%FBS、1%青链霉素的DMEM培养基,并置于37 ℃、5%CO2的恒温培养箱培养。经传代2次后,接种至24孔培养板,等到细胞含量达到约80%时,使用MOI=0.1的PEDV CV777毒株感染细胞2 h,更换培养基继续培养至不同时间点提取RNA。
首先配制终浓度为2%的硫酸葡聚糖钠(dextran sulfate sodium, DSS),取0.1 g的DSS预先溶解于50 mL的DMEM培养基中,并通过0.45 μm滤膜进行无菌过滤备用。等到IPEC-J2细胞生长至融合状态后,使用DSS处理细胞以破坏肠道屏障,设置不同分组,处理时间分别为0、12、24和48 h。在每个时间点收集细胞用于RNA提取,所有样本在提取前均经氯化锂纯化。
采用Trizol法提取RNA,使用反转录试剂盒进行反转录,在PCR管中加入适量RNA溶液,在梯度PCR仪65 ℃下进行5 min失活变性反应,结束后立即放入冰盒中冷却。将冷却后的变性RNA按反应液比例配制,放入PCR仪中,37 ℃下进行15 min逆转录反应,接着在98 ℃反应条件下进行5 min的酶失活反应。所得的cDNA在-20 ℃条件下储存。
根据NCBI数据库提供的lncRNA663(XR_001302663.2)、PEDV M、CLDN10和GAPDH基因序列,通过Primer Premier 5.0设计引物,引物序列参考表1。利用PEDV侵染猪小肠上皮细胞后,分别在0、4、8、12、24 h时利用Trizol法提取细胞RNA,利用反转录合成cDNA,以GAPDH为内参基因,进行荧光定量PCR反应,PCR反应条件:95 ℃ 5 min;95 ℃ 10 s;60 ℃ 30 s,共40个循环;熔解曲线:95 ℃ 15 s,60℃ 1 min;95 ℃ 15 s;60 ℃ 15 s。每个样本设置3个重复,通过2-ΔΔCt 方法计算不同时间段目的基因相对转录量。
使用RIPA裂解液(radioimmunoprecipitation assay lysis buffer)裂解细胞后,采用BCA蛋白定量法(bicinchoninic acid protein assay)对蛋白质进行定量分析。取20 μg蛋白样品,经10% SDS-PAGE凝胶电泳分离后转膜至0.22 μm的PVDF膜上。膜在5%脱脂乳中封闭后,于4 °C下与一抗(CLDN10和PEDV N)孵育过夜。洗膜后,再与相应二抗孵育,并使用ECL发光检测试剂盒显色检测蛋白条带,HSP90作为内参蛋白。
在NCBI数据库中,查找lncRNA663基因序列并下载,利用lncLocator软件,对lncRNA663亚细胞定位进行预测分析。除此之外,为了探究lncRNA663与CLDN10之间生物学联系,利用在线软件RNA-Protein Interaction Prediction (RPISeq,http://pridb.gdcb.iastate.edu/RPISeq/index.html)预测lncRNA663和CLDN10互作可能性。
根据lncRNA663基因序列,利用Invitrogen RNAi Designer软件设计3对siRNA和阴性对照序列(表2)。将IPEC-J2 细胞接种至12孔板中,待细胞聚集达到约50%时,利用jetPRIME试剂将siRNAs转染至IPEC-J2细胞中。48 h后收集细胞,按照Trizol法提取细胞总RNA并反转录成cDNA,利用实时荧光定量PCR计算lncRNA663干扰效率。为进一步探究lncRNA663对PEDV复制影响,以PEDV感染lncRNA663干扰组和对照组细胞,利用实时荧光定量PCR检测PEDV M、CLDN10的相对表达水平。
从NCBI Protein数据库中获取CLDN10和PEDV S的蛋白质序列,利用Alphafold3(https://alphafoldserver.com/welcome)软件,输入CLDN10和PEDV S的蛋白质序列,预测结束后下载预测数据结果。打开预测数据结果,找出PDB文件导入ChimeraX 1.9软件中,在H-Bonds界面设置距离和角度,选择显示蛋白质间的氢键,找出氢键结合位点并标注。
利用SPSS 25.0软件对样本数据独立分析,对于两组间的差异比较,使用独立样本t检验;对于三组及以上的比较,采用单因素方差分析(One-way ANOVA),并通过GraphPad Prim 9.0软件绘图。试验结果用“x±s”表示,P<0.05表示差异显著。
PEDV(MOI=0.1)感染IPEC-J2细胞后,在0、4、12、24 h分别检测lncRNA 663和CLDN10的转录水平。结果表明,随着PEDV感染的时间延长,lncRNA663转录水平逐步增加,并在12 h达到峰值(P<0.05),此后lncRNA663转录水平下降(图1A)。CLDN10则在PEDV感染24 h之内一直呈现持续性增长,在24 h达到峰值(P<0.05)(图1B),并且Western blot结果显示,PEDV感染后CLDN10表达上升(图1C)。为了进一步探究lncRNA663和CLDN10的关系,本研究利用DSS处理建立了IPEC-J2肠道屏障受损模型,结果显示,DSS处理后,lncRNA663和CLDN10的转录水平均显著性下降(P<0.05),且CLDN10蛋白表达也发生下调(图1D~F)。综上所述,在PEDV感染和DSS处理条件下,lncRNA663与CLDN10均表现出相似的表达变化趋势,提示二者可能具有一定的表达关联性,但其具体关系及调控机制仍有待进一步研究。
为深入探究lncRNA663在细胞内的定位情况,利用lncLocator软件对lncRNA 663定位情况进行预测。结果显示,lncRNA663在细胞质、细胞核、核糖体及外泌体中都可能存在表达,但是定位于细胞质中的可能性最大(88.1%)(图2A)。为探讨lncRNA663与CLDN10之间的潜在生物学关联,利用RPISeq软件对lncRNA 663和CLDN10两者间互作可能性的预测分析。预测结果显示,lncRNA663和CLDN10高度互作(SVM:0.98,RF:0.8)(图2B)。基于上述结果,推测lncRNA663可能通过与CLDN10的相互作用参与其表达调控。
为了进一步探究lncRNA663对CLDN10表达和PEDV感染的影响,本研究设计并合成了针对lncRNA663的三种干扰siRNAs。干扰试验结果显示,与阴性对照组(NC组)相比,三组siRNA均显著降低了lncRNA663的转录水平(P<0.05),其中,siRNA1干扰效率为39.92%,siRNA2干扰效率为62.31%,siRNA3干扰效率为84.76%(图3),其中siRNA3具有最高的干扰效率,可用于后续的功能验证试验。
利用实时荧光定量PCR分别检测在lncRNA663干扰后CLDN10和PEDV M基因转录水平。由结果可知,lncRNA663干扰后,与对照组(NC组)相比,CLDN10的相对转录水平(图4A)和PEDV M基因的相对转录水平(图4B)均显著下降(P<0.05)。Western blot结果显示lncRNA663干扰后CLDN10和PEDV N蛋白的表达均明显下降,提示lncRNA663可能在CLDN10的表达调控中发挥正向调节作用,同时,PEDV M基因表达和N蛋白表达的同步下降进一步表明,lncRNA663可能通过调控CLDN10的表达间接影响病毒的复制过程。
通过Alphafold3预测CLDN10和PEDV S结合,并通过ChimeraX 1.9可视化(图5),结果显示CLDN10与PEDV S间存在7对潜在氢键相互作用,提示二者之间可能存在结合能力。CLDN10在维持细胞极性、调节离子和溶质的跨细胞屏障运输等方面具有重要作用,因此推测PEDV S蛋白可能通过与CLDN10的相互作用,影响宿主细胞的屏障功能,从而促进其在IPEC-J2细胞中的感染与复制。
PEDV入侵宿主细胞时,宿主机体会迅速产生一系列的免疫应答,表达一系列抗病毒因子。lncRNA在病毒感染的调控中扮演着重要角色,研究这些分子有助于更好地理解病毒与宿主之间的相互作用机制。王海珍等[16]研究发现lncRNA对PEDV复制也发挥着重要的调控作用,参与调控紧密连接蛋白的表达。当前研究主要聚焦于单一分子层面(如长链非编码RNA或紧密连接蛋白)对PEDV的独立调控作用,然而关于二者在PEDV感染进程中形成的交互作用机制尚未被系统性揭示,相关分子互作机制及其病理学意义仍待深入探索。
本研究以lncRNA 663和CLDN10为试验对象,利用PEDV感染IPEC-J2细胞,通过 qRT-PCR和Western blot发现两者的表达水平在PEDV感染后显著上升。紧密连接蛋白是构成细胞间紧密连接的核心功能分子,主要分布于上皮细胞和内皮细胞的顶端。在维持组织屏障功能中起关键作用[17]。紧密连接作为一种物理屏障,是抵抗病毒入侵的第一道防线[18]。但一些紧密连接蛋白,会在病毒入侵时充当辅助受体,帮助病毒入侵[19]。李程程等[4]研究发现特定的紧密连接蛋白在经过PEDV感染后,其表达水平显著上升,对PEDV感染具有促进作用。病毒利用或调控细胞间紧密连接蛋白是促进自身的感染与复制的重要途径[20⁃22]。课题组前期研究发现lncRNA可以通过调控紧密连接相关蛋白抵抗PEDV的感染[23],为了进一步验证其相关性,本研究引入DSS处理诱导IPEC-J2细胞肠道屏障功能受损模型。结果发现在DSS处理条件下,lncRNA663和CLDN10的表达水平均显著下降,提示二者在维持肠道屏障完整性方面可能具有协同作用。该结果间接支持了lncRNA663与CLDN10在病毒感染过程中存在某种功能联系,并可能共同参与PEDV诱导的屏障破坏过程。
为进一步探究lncRNA663是否通过CLDN10调控PEDV感染,本研究首先利用lncLocator软件预测了其亚细胞定位情况。结果显示,定位在细胞质中的可能性最大(88.1%),lncRNA的功能与其在细胞中的定位有着密切联系,根据Wu等[24]研究推测具有一定转录后调控基因功能,作为miRNA前体物质,调节靶基因表达;也可能作为蛋白质支架调控基因表达[25]。因此,本研究利用RPISeq对lncRNA663和CLDN10的互作关系进行了预测。RPISeq能够仅使用序列衍生信息就可以可靠地预测RNA-蛋白质相互作用[26]。本研究利用该软件预测了lncRNA663和CLDN10存在高度互作(SVM:0.98,RF:0.8),并且在lncRNA干扰后CLDN10的表达和PEDV的复制显著下降,Boltaña等[27]研究发现部分lncRNA可以通过调控蛋白,进而来调控病毒复制,由此推测lncRNA 663可能通过影响CLDN10的表达水平来影响PEDV表达。蛋白质结合位点的研究有助于理解蛋白质功能,从分子层面了解疾病的治病机制和药物治疗[28]。本研究通过AlphaFold3初步预测了PEDV S和CLDN10的氢键结合位点,并通过ChimeraX将其可视化,发现共存在7个氢键结合位点。这些结合位点可能作为潜在功能位点参与PEDV感染过程,可作为后续基因调控机制研究切入点。本研究通过基因互作角度,初步探究了lncRNA663和CLDN10在 PEDV感染、复制过程中的相关性,发现PEDV可以通过上调lncRNA 663促进CLDN10表达及自身复制,为今后PEDV的致病机理研究提供方向。然而,本研究仍存在一定的局限性。首先,虽然通过qRT-PCR和Western blot分析了lncRNA663和CLDN10在PEDV感染过程中的表达变化,但对它们的互作关系尚缺乏进一步的试验验证,如RNA pull-down或Co-IP等方法,这些将在未来的研究中进一步完善。其次,lncRNA663的全长较长,扩增及表达过程中存在技术挑战,因此未能在试验中进行完整的功能验证。此外,本研究中的细胞试验主要集中在IPEC-J2细胞上,未来应考虑在其他细胞系甚至动物模型中进行验证,以增加结果的广泛性和可靠性。今后将对这些方向进一步探索,以期为PEDV防治提供新的思路和方向。
本研究初步揭示了PEDV感染过程中宿主lncRNA 663与CLDN10的表达关联及其对病毒复制的调控作用。研究发现,PEDV感染上调lncRNA 663和CLDN10的表达,lncRNA663可能通过提高CLDN10的表达,进而促进病毒的感染水平,这是猪冠状病毒利用宿主进行免疫逃逸新的潜在靶点。本研究为阐明PEDV致病机制提供了新的分子依据,并为靶向lncRNA 663或CLDN10的抗病毒研究提供了理论参考和潜在策略。
  • 浙江省自然科学基金青年科学基金项目(ZCLQN25C1702)
  • 浙江农林大学人才启动项目(2024LFR035)
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2026年第57卷第2期
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doi: 10.11843/j.issn.0366-6964.2026.02.031
  • 接收时间:2025-05-27
  • 首发时间:2026-09-16
  • 出版时间:2026-02-23
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  • 收稿日期:2025-05-27
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浙江省自然科学基金青年科学基金项目(ZCLQN25C1702)
浙江农林大学人才启动项目(2024LFR035)
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    浙江农林大学动物科技学院·动物医学院,杭州 311300

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钦伟云,主要从事猪抗病育种研究,E-mail:
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2种不同金属材料的力学参数
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genus
种数
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species
占总种数比例
Percentage of
total species (%)
属
Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
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
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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