Article(id=1307013449213567637, tenantId=1146029695717560320, journalId=1306274286668972124, issueId=1307013104081068276, articleNumber=null, orderNo=null, doi=10.11843/j.issn.0366-6964.2026.02.034, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1746547200000, receivedDateStr=2025-05-07, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1789545889427, onlineDateStr=2026-09-16, pubDate=1771776000000, pubDateStr=2026-02-23, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1789545889427, onlineIssueDateStr=2026-09-16, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1789545889427, creator=13701087609, updateTime=1789545889427, 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=979, endPage=993, ext={EN=ArticleExt(id=1307013449440060054, articleId=1307013449213567637, tenantId=1146029695717560320, journalId=1306274286668972124, language=EN, title=Selection of DNA Aptamers Targeting Nectin1 and Their Inhibitory Effect on Adsorption of Pseudorabies Virus to Host Cells
in vitro, columnId=1307007432299930010, journalTitle=Acta Veterinaria et Zootechnica Sinica, columnName=PREVENTIVE VETERINARY MEDICINE, runingTitle=null, highlight=null, articleAbstract=
This study aimed to achieve soluble prokaryotic expression of the N-terminal extracellular domain of the pseudorabies virus (PRV) receptor Nectin1 protein, and to screen high-affinity, high-specificity DNA aptamers targeting it, thereby providing a novel molecular tool for blocking PRV adsorption. The porcine Nectin1 gene was cloned into the prokaryotic expression vector pET28a containing a maltose-binding protein (MBP) solubility-enhancing tag to construct the recombinant plasmid pET28a-MBP-Nectin1. The correctly digested and sequenced recombinant plasmid was transformed into Escherichia coli BL21 (DE3) for induced expression. The recombinant protein was validated by Western blot and pull-down assays. A DNA aptamer specifically targeting rMBP-Nectin1 was selected using magnetic bead-coupled Systematic Evolution of Ligands by EXponential enrichment (SELEX). The affinity and specificity of the selected aptamer Apt-Nectin1-6 were evaluated by magnetic bead-based ELASA. Nectin1 knockdown cell lines (sh-Nectin1-1 and sh-Nectin1-2) were used as controls to verify the binding ability of Apt-Nectin1-6 to cell surface Nectin1 by flow cytometry. Additionally, the inhibitory effect of the aptamer on on adsorption of pseudorabies virus to host cells was assessed by flow cytometry and viral genome copy number analysis. Western blot and pull-down assays confirmed the correct expression and biological activity of the recombinant MBP-Nectin1 protein. Through SELEX, the DNA aptamer Apt-Nectin1-6, exhibiting high affinity to rMBP-Nectin1 with an equilibrium dissociation constant (Kd) of (0.11±0.02) nmol and no cross-reactivity with rMBP-gD, rMBP-S1, rMBP-CD163, or rMBP alone, was successfully screened. Molecular docking analysis indicated that Apt-Nectin1-6 binds to Nectin1 via hydrogen bonds. Further flow cytometry, viral genome copy number quantification, and virus titration collectively demonstrated that Apt-Nectin1-6 inhibits PRV adsorption to host cells in a dose-dependent manner. (P<0.05). In this study, a DNA aptamer Apt-Nectin1-6 with high specificity and affinity for the Nectin1 protein was successfully screened and verified to effectively block PRV adsorption, providing a foundation for developing novel anti-PRV strategies.
, authors=Yan QIAO, Jiafu ZHAO, Xiaotian CHANG, Zheng CHEN, Yingqian HAN, Chao ZHANG, authorsList=Yan QIAO, Jiafu ZHAO, Xiaotian CHANG, Zheng CHEN, Yingqian HAN, Chao ZHANG, authorCompany=null, correspAuthors=Chao ZHANG, authorNote=null, correspAuthorsNote=
, 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=1307013451793064619, articleId=1307013449213567637, tenantId=1146029695717560320, journalId=1306274286668972124, language=CN, title=靶向Nectin1的DNA适配体筛选及其对伪狂犬病病毒体外感染细胞的吸附阻断效应, columnId=1307007432459313564, journalTitle=畜牧兽医学报, columnName=预防兽医, runingTitle=null, highlight=null, articleAbstract=
本研究旨在可溶性原核表达伪狂犬病病毒(PRV)受体Nectin1蛋白的N端胞外结构域,并以此为靶标,筛选出高亲和力、高特异性的DNA适配体,为阻断伪狂犬病病毒吸附宿主细胞提供新的分子工具。将猪源Nectin1基因克隆至带有麦芽糖结合蛋白(MBP)促溶标签的原核表达载体pET28a中,构建重组质粒pET28a-MBP-Nectin1,将双酶切鉴定和测序正确的重组质粒转入大肠杆菌BL21(DE3)进行诱导表达,使用Western blot和Pull-down试验验证重组蛋白。采用基于磁珠偶联的系统进化适配体筛选技术(SELEX)筛选特异性靶向rMBP-Nectin1的DNA适配体,并利用磁珠ELASA检测筛选所得适配体Apt-Nectin1-6的亲和力与特异性。以敲减Nectin1蛋白的细胞系(sh-Nectin1-1、sh-Nectin1-2)为对照,应用流式细胞术验证Apt-Nectin1-6对细胞表面Nectin1蛋白的结合能力,同时通过流式细胞术和基因组拷贝数试验评估其对PRV吸附细胞的抑制作用。Western blot和Pull-down结果表明重组MBP-Nectin1蛋白正确表达且具有生物学活性。通过SELEX技术筛选获得的适配体Apt-Nectin1-6对rMBP-Nectin1具有高亲和力,平衡解离常数(Kd)为(0.11±0.02) nmol,且不与rMBP-gD、rMBP-S1、rMBP-CD163及rMBP蛋白发生交叉反应。分子对接结果显示,Apt-Nectin1-6通过氢键与Nectin1结合。进一步流式细胞术、基因组拷贝数检测和病毒滴度测定结果显示,Apt-Nectin1-6可剂量依赖性地抑制PRV对细胞的吸附(P<0.05)。本研究成功筛选得到可高特异性、高亲和力结合Nectin1蛋白的DNA适配体Apt-Nectin1-6,并证实其可有效阻断PRV对细胞的吸附,为开发新的抗PRV策略奠定基础。
, authors=乔岩, 赵家富, 常潇天, 陈征, 韩莹倩, 张超, authorsList=乔岩, 赵家富, 常潇天, 陈征, 韩莹倩, 张超, authorCompany=null, correspAuthors=张超, authorNote=
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Viruses,2022,14(5):874., articleTitle=null, refAbstract=null), Reference(id=1307282521926951323, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[30], rfOrder=32, authorNames=null, journalName=null, refType=null, unstructuredReference=王 巍,贾凌云.适配体筛选方法研究进展[J].分析化学,2009,37(3):454-460., articleTitle=null, refAbstract=null), Reference(id=1307282522279272861, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[30], rfOrder=33, authorNames=null, journalName=null, refType=null, unstructuredReference=WANG W,JIA L Y.Research progress on aptamer selection methods [J].
Chinese Journal of Analytical Chemistry,2009,37(3):454-460.(in Chinese), articleTitle=null, refAbstract=null), Reference(id=1307282523088773535, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[31], rfOrder=34, authorNames=null, journalName=null, refType=null, unstructuredReference=张冬萱,王智豪,乔岩,等.猪流行性腹泻病毒S1蛋白的原核表达及其核酸适配体的筛选[J].畜牧兽医学报,2025,56(2):839-850., articleTitle=null, refAbstract=null), Reference(id=1307282523214602656, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[31], rfOrder=35, authorNames=null, journalName=null, refType=null, unstructuredReference=ZHANG D X,WANG Z H,QIAO Y,et al.Prokaryotic expression of porcine epidemic diarrhea virus S1 protein and selection of its nucleic acid aptamers[J].
Journal of Animal Husbandry and Veterinary Medicine,2025,56(2):839-850.(in Chinese), articleTitle=null, refAbstract=null), Reference(id=1307282523596284321, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[32], rfOrder=36, authorNames=null, journalName=null, refType=null, unstructuredReference=GELINAS A D,DAVIES D R,JANJIC N.Embracing proteins:structural themes in aptamer-protein complexes[J].
Curr Opin Struct Biol,2016,36:122-132., articleTitle=null, refAbstract=null)], funds=[Fund(id=1307282509838967160, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, awardId=252300420197, language=CN, fundingSource=河南省自然科学基金(252300420197), fundOrder=null, country=null), Fund(id=1307282510149345657, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, awardId=31972672, language=CN, fundingSource=国家自然科学基金(31972672), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1307282500674412847, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, xref=null, ext=[AuthorCompanyExt(id=1307282500682801456, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, companyId=1307282500674412847, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Key Laboratory of Animal Biochemistry and Nutrition,Ministry of Agriculture and Rural Affairs,College of Veterinary Medicine,Henan Agricultural University,Zhengzhou 450046,China), AuthorCompanyExt(id=1307282500691190065, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, companyId=1307282500674412847, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=河南农业大学动物医学院,农业农村部动物生化与营养重点开放实验室,郑州 450046)])], figs=[ArticleFig(id=1307282504826773854, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=EN, label=Fig.1, caption=
Verification of the pET28a-MBP-Nectin1 recombinant plasmidThe pET28a-MBP-Nectin1 recombinant plasmid was digested at 37 ℃ for 3 h; M. DL5000 DNA marker; 1. Double digestion with BamHⅠ and XhoⅠ; 2. Uncut control
, figureFileSmall=Rq1AdSeRz5eWx4cejJF1dg==, figureFileBig=zeaLqCaoc5kpPO1XW/O/cg==, tableContent=null), ArticleFig(id=1307282504898077023, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=CN, label=图1, caption=
pET28a-MBP-Nectin1重组质粒酶切验证取pET28a-MBP-Nectin1重组质粒,在37 ℃酶切3 h;M. DL5000 DNA 相对分子质量标准;1. Bam HⅠ和XhoⅠ双酶切;2. 未酶切对照组
, figureFileSmall=Rq1AdSeRz5eWx4cejJF1dg==, figureFileBig=zeaLqCaoc5kpPO1XW/O/cg==, tableContent=null), ArticleFig(id=1307282505145540960, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=EN, label=Fig.2, caption=
Purification and identification of rMBP-Nectin1 and rMBP proteinsA. SDS-PAGE analysis of the purified rMBP-Nectin1 (80 ku) and rMBP (45 ku) proteins; B. Western blot identification of rMBP-Nectin1 and rMBP proteins using an anti-MBP monoclonal antibody; C. Western blot identification of rMBP-Nectin1 and rMBP proteins using an anti-Nectin1 polyclonal antibody; D. Purified rMBP-Nectin1 protein was incubated with magnetic beads at 4 ℃, followed by incubation with PRV overnight for Pull-down assays. rMBP protein was used as a control. Detection was performed by Western blot using an anti-gB monoclonal antibody
, figureFileSmall=C7uzynwy3AVH2MTDwehYKQ==, figureFileBig=Fw/mn/7R2W6GnYglcuMzkw==, tableContent=null), ArticleFig(id=1307282505212649825, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=CN, label=图2, caption=
rMBP-Nectin1和rMBP蛋白的纯化及鉴定A.纯化后的rMBP-Nectin1(80 ku)和rMBP(45 ku)蛋白的SDS-PAGE分析;B.使用MBP单抗对rMBP-Nectin1和rMBP蛋白进行Western blot鉴定;C.使用Nectin1多抗对rMBP-Nectin1和rMBP蛋白进行Western blot鉴定;D.将纯化的rMBP-Nectin1蛋白与磁珠在4 ℃孵育后,加入PRV病毒液过夜孵育,利用Pull-down方法捕获PRV病毒,rMBP蛋白作为对照,使用gB单抗进行Western blot鉴定
, figureFileSmall=C7uzynwy3AVH2MTDwehYKQ==, figureFileBig=Fw/mn/7R2W6GnYglcuMzkw==, tableContent=null), ArticleFig(id=1307282505640468834, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=EN, label=Fig.3, caption=
Analysis of enrichment efficiency by qPCR and flow cytometryA. qPCR analysis of library enrichment. The 4th-round library (green), 8th-round library (brown), 12th-round library (yellow), and 13th-round library (light blue) were selected as templates for qPCR, with the random library (dark blue) as the control. Melting temperature curves were analyzed, where higher melting temperatures indicated lower library complexity. B. Flow cytometry analysis of library enrichment. Libraries from the 4th round (light green), 8th round (orange), 12th round (blue), 13th round (red), and random library (dark green) were amplified using FAM-labeled primers. The amplified products were prepared as single-stranded DNA and incubated with Nectin1-conjugated magnetic beads, with blank magnetic beads serving as the control
, figureFileSmall=chOAfU5dza/HdKMW8CU3Gg==, figureFileBig=dvg7IG8m2BI7fHBxraYyuA==, tableContent=null), ArticleFig(id=1307282505724354915, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=CN, label=图3, caption=
qPCR及流式细胞术检测筛选适配体富集情况A. qPCR检测富集结果。选取第4轮文库(绿色)、第8轮文库(褐色)、第12轮文库(黄色)、第13轮文库(浅蓝色)作为模板,进行qPCR,随机文库(深蓝色)为对照,分析其熔炼温度曲线,熔链温度越高,文库复杂性越低;B.流失细胞术检测富集结果。用FAM标记的引物扩增第4轮文库(浅绿色)、第8轮文库(橙色)、第12轮文库(蓝色)、第13轮文库(红色)文库和随机文库(深绿色),将扩增产物制备成单链后,分别与Nectin1-磁珠孵育,使用空白磁珠作为对照
, figureFileSmall=chOAfU5dza/HdKMW8CU3Gg==, figureFileBig=dvg7IG8m2BI7fHBxraYyuA==, tableContent=null), ArticleFig(id=1307282505904709988, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=EN, label=Fig.4, caption=
Detection of binding between candidate aptamers and Nectin1-conjugated magnetic beadsFAM-labeled candidate aptamers were incubated with Nectin1-conjugated magnetic beads for 1 h, with magnetic beads without Nectin1 serving as the control. Fluorescence signals on the surfaces of magnetic beads were observed under a fluorescence microscope
, figureFileSmall=qO40EVHnjOXwazIQJMkgVA==, figureFileBig=ddJ73qmOfuhwVtLQy3mL9g==, tableContent=null), ArticleFig(id=1307282506009567589, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=CN, label=图4, caption=
候选核酸适配体与Nectin1结合效果分析取FAM标记的候选适配体与Nectin1偶联磁珠孵育1 h,以未结合Nectin1的磁珠作为对照,通过荧光显微镜观察各组磁珠表面的荧光信号
, figureFileSmall=qO40EVHnjOXwazIQJMkgVA==, figureFileBig=ddJ73qmOfuhwVtLQy3mL9g==, tableContent=null), ArticleFig(id=1307282506072482150, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=EN, label=Fig.5, caption=
Specificity and affinity analysis of candidate aptamers for Nectin1 proteinA. The binding specificity of Apt-Nectin1-1, Apt-Nectin1-5, and Apt-Nectin1-6 to rMBP-Nectin1, rMBP-gD, rMBP-S1, rMBP-CD163, and rMBP proteins was evaluated by magnetic bead-based ELISA; B. The affinity of Apt-Nectin1-6 for rMBP-Nectin1 was determined by magnetic bead-based ELISA, and the equilibrium dissociation constant (Kd) was calculated
, figureFileSmall=a60p7V6lQjMaStn4AEPLgw==, figureFileBig=YoaSb3sWVybMVZ80xkgw4A==, tableContent=null), ArticleFig(id=1307282506319946087, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=CN, label=图5, caption=
候选核酸适配体与Nectin1蛋白的特异性及亲和力检测A. 采用磁珠ELISA法检测Apt-Nectin1-1、Apt-Nectin1-5和Apt-Nectin1-6与rMBP-Nectin1、rMBP-gD、rMBP-S1、rMBP-CD163及rMBP蛋白的结合特异性;B. 采用磁珠ELISA法测定Apt-Nectin1-6与rMBP-Nectin1的亲和力,计算平衡解离常数(Kd)
, figureFileSmall=a60p7V6lQjMaStn4AEPLgw==, figureFileBig=YoaSb3sWVybMVZ80xkgw4A==, tableContent=null), ArticleFig(id=1307282506395443560, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=EN, label=Fig.6, caption=
Secondary structure prediction of Apt-Nectin1-6 aptamer and molecular docking analysis with Nectin1 proteinA. Predicted secondary structure of the Apt-Nectin1-6 aptamer; B. Molecular docking result showing the interaction between the Apt-Nectin1-6 aptamer (green) and the Nectin1 protein (orange), with yellow dashed lines representing hydrogen bonds
, figureFileSmall=m1u39HR4WQGObhmlnp/KXg==, figureFileBig=xDCRiKUDgUnvjCs4LG2o/w==, tableContent=null), ArticleFig(id=1307282506458358121, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=CN, label=图6, caption=
Apt-Nectin1-6适配体的二级结构预测及与Nectin1蛋白的分子对接分析A. Apt-Nectin1-6适配体的二级结构预测结果;B. Apt-Nectin1-6适配体(绿色)与Nectin1蛋白(橙色)的分子对接结果,黄色虚线表示形成的氢键
, figureFileSmall=m1u39HR4WQGObhmlnp/KXg==, figureFileBig=xDCRiKUDgUnvjCs4LG2o/w==, tableContent=null), ArticleFig(id=1307282506542244202, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=EN, label=Fig.7, caption=
Validation of Apt-Nectin1-6 aptamer recognition of cell surface Nectin1 in multiple cell linesA. FAM-labeled Apt-Nectin1-6 was incubated with Vero, PK15, BHK21, and 293T cells. A random library was used as a negative control. Fluorescence intensity was analyzed by flow cytometry to evaluate the recognition ability of the aptamer for cell surface Nectin1. B. Sequence fragments of Nectin1 derived from pig, African green monkey, hamster, and human were analyzed for homology using MEGA6 software. Conserved amino acid residues potentially involved in binding with Apt-Nectin1-6 were highlighted with red boxes
, figureFileSmall=6J5BJ5uCBKne6QRqN4ZElA==, figureFileBig=Eys2+reLd6H0XPKngRrc7g==, tableContent=null), ArticleFig(id=1307282506621935979, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=CN, label=图7, caption=
Apt-Nectin1-6适配体对多种细胞表面Nectin1蛋白的识别能力验证A.采用FAM荧光标记的Apt-Nectin1-6分别与Vero、PK15、BHK21和293T细胞共孵育,以随机文库作为阴性对照组,流式细胞术检测荧光强度,评估适配体对细胞表面Nectin1的识别能力;B.对来源于猪、非洲绿候、仓鼠和人的Nectin1片段利用MEGA6软件进行同源性分析,与Apt-Nectin1-6结合的保守氨基酸位点用红色方框标示
, figureFileSmall=6J5BJ5uCBKne6QRqN4ZElA==, figureFileBig=Eys2+reLd6H0XPKngRrc7g==, tableContent=null), ArticleFig(id=1307282506735182188, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=EN, label=Fig.8, caption=
Construction of Nectin1-knockdown PK15 cells and specificity validation of Apt-Nectin1-6 aptamer recognitionA. Construction of Nectin1-specific shRNA stable knockdown PK15 cell lines (sh-Nectin1-1 and sh-Nectin1-2) by lentiviral transduction and puromycin selection for 24 h. Nectin1 mRNA expression was detected by qRT-PCR, using GAPDH as the internal control. Untransfected PK15 cells were used as the blank control; B. Cells were incubated with PRV-GFP at 4℃ for 1 h for viral adsorption, then cultured in DMEM containing 1% FBS at 37 ℃with 5% CO₂ for 8 h. Fluorescence intensity was analyzed by flow cytometry. Normal PK15 cells served as control; C. FAM-labeled Apt-Nectin1-6 was incubated with PK15 and shRNA-Nectin1-1/2 cells. The random library incubated with PK15 cells was used as a negative control. Binding ability was assessed by flow cytometry. ***.P<0.001
, figureFileSmall=zsnZ1hQqJr4ZVTevWYym/Q==, figureFileBig=TgL+duHLhK/Jy526+rHs1g==, tableContent=null), ArticleFig(id=1307282506823262573, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=CN, label=图8, caption=
Nectin1敲减PK15细胞的构建及Apt-Nectin1-6适配体识别能力的特异性验证A.通过慢病毒包装系统转染PK15细胞并经嘌呤霉素筛选24 h,构建Nectin1基因特异性shRNA稳定敲减细胞系(sh-Nectin1-1和sh-Nectin1-2),以GAPDH为内参基因,使用qRT-PCR检测Nectin1 mRNA表达水平,未转染细胞作为空白对照;B.将敲减细胞与PRV-GFP在4 ℃条件下孵育1 h完成病毒吸附,随后更换含1% FBS的DMEM维持液,在37 ℃、5% CO₂条件下培养8 h,使用流式细胞术检测荧光强度,正常PK15细胞作为对照;C.FAM标记的Apt-Nectin1-6分别与正常PK15及敲减细胞(sh-Nectin1-1/2)共孵育,随机文库与PK15细胞孵育作为阴性对照,流式细胞术检测结合能力。***.P<0.001
, figureFileSmall=zsnZ1hQqJr4ZVTevWYym/Q==, figureFileBig=TgL+duHLhK/Jy526+rHs1g==, tableContent=null), ArticleFig(id=1307282506898760046, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=EN, label=Fig.9, caption=
Cytotoxicity of Apt-Nectin1-6 and its blocking effect on the adsorption of virus to cellsA. PK15 and Vero cells were treated with varying concentrations (0,3,5,7, and 10 μmol·L- ¹) of Apt-Nectin1-6, and cell viability was assessed using the CCK-8 assay to evaluate cytotoxicity; B. The antiviral effect of Apt-Nectin1-6 was analyzed by flow cytometry, detecting PRV infection in treated PK15 and Vero cells; C. Quantitative PCR was performed to detect viral genome copy numbers after PRV adsorption, evaluating the aptamer’s ability to block virus attachment; D. Culture supernatants were collected at 24 hours post-infection, and viral titers were determined using the TCID50 method to further evaluate the inhibitory effect of the aptamer on PRV replication. ns. Not significant; *.P< 0.05; **.P< 0.01;***.P< 0.001
, figureFileSmall=IufbHAlPC18+DZ1tEhY25w==, figureFileBig=ABA5+OU3XY06TtelXgdy6Q==, tableContent=null), ArticleFig(id=1307282508530344304, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=CN, label=图9, caption=
Apt-Nectin1-6适配体的细胞毒性与体外感染细胞的吸附阻断效应A. 不同浓度(0、3、5、7、10 μmol·L-¹)的 Apt-Nectin1-6 处理 PK15 和 Vero 细胞后,采用 CCK-8 法检测细胞活力,评估适配体的细胞毒性;B. 用流式细胞术检测适配体处理对 PRV 感染 PK15 和 Vero 细胞的影响,分析其抑制病毒感染的能力;C. 采用qPCR 方法检测细胞吸附病毒后的基因组拷贝数,评价适配体阻断 PRV 吸附的效果;D. 感染后 24 h 收集细胞上清,采用TCID50法检测病毒滴度,进一步分析适配体对病毒复制的抑制作用。ns. 差异不显著;*.P< 0.05; **.P< 0.01;***.P< 0.001
, figureFileSmall=IufbHAlPC18+DZ1tEhY25w==, figureFileBig=ABA5+OU3XY06TtelXgdy6Q==, tableContent=null), ArticleFig(id=1307282508610036082, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=EN, label=Table 1, caption=
shRNA interference sequence
, figureFileSmall=null, figureFileBig=null, tableContent=
| 名称 Name | 序列(5′→3′) Sequence |
|---|
| Nectin1-1F | CCGGAGCATCCTGCTGGTGCTATTTCTCGAGAAATAGCACCAGCAGGATGCTTTTTTG |
| Nectin1-1R | AATTCAAAAAAGCATCCTGCTGGTGCTATTTCTCGAGAAATAGCACCAGCAGGATGCT |
| Nectin1-2F | CCGGAGAACGACGGGTCTTTCATTTCTCGAGAAATGAAAGACCCGTCGTTCTTTTTTG |
| Nectin1-2R | AATTCAAAAAAGAACGACGGGTCTTTCATTTCTCGAGAAATGAAAGACCCGTCGTTCT |
), ArticleFig(id=1307282508672950643, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=CN, label=表1, caption=
shRNA干扰序列
, figureFileSmall=null, figureFileBig=null, tableContent=
| 名称 Name | 序列(5′→3′) Sequence |
|---|
| Nectin1-1F | CCGGAGCATCCTGCTGGTGCTATTTCTCGAGAAATAGCACCAGCAGGATGCTTTTTTG |
| Nectin1-1R | AATTCAAAAAAGCATCCTGCTGGTGCTATTTCTCGAGAAATAGCACCAGCAGGATGCT |
| Nectin1-2F | CCGGAGAACGACGGGTCTTTCATTTCTCGAGAAATGAAAGACCCGTCGTTCTTTTTTG |
| Nectin1-2R | AATTCAAAAAAGAACGACGGGTCTTTCATTTCTCGAGAAATGAAAGACCCGTCGTTCT |
), ArticleFig(id=1307282508836528500, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=EN, label=Table 2, caption=
Absolutequantification primer sequences
, figureFileSmall=null, figureFileBig=null, tableContent=
| 名称 Name | 序列(5′→3′) Sequence |
|---|
| PRV-gH-F | CTCGCCATCGTCAGCAA |
| PRV-gH-R | GCTGCTCCTCCATGTCCTT |
), ArticleFig(id=1307282508924608885, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=CN, label=表2, caption=
绝对定量引物序列
, figureFileSmall=null, figureFileBig=null, tableContent=
| 名称 Name | 序列(5′→3′) Sequence |
|---|
| PRV-gH-F | CTCGCCATCGTCAGCAA |
| PRV-gH-R | GCTGCTCCTCCATGTCCTT |
), ArticleFig(id=1307282509335650678, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=EN, label=Table 3, caption=
Candidate aptamer sequences
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| 名称 Name | 序列(5′→3′) Sequence | 占比/% Percent |
|---|
| Apt-Nectin1-1 | AGTTGACGCTGGTGTGGGACCATCGTGACAGCTATGACTGCCTTGAGTTAATA-TCCGTGGTCAATCTGCGTGCGTCCAGT | 38.54 |
| Apt-Nectin1-2 | AGTTGACGCTGGTGTGGGACGTCTACACCCCAGGGAATGCAGACCCCAGGTGG-CACAGTATCAATCTGCGTGCGTCCAGT | 17.70 |
| Apt-Nectin1-3 | AGTTGACGCTGGTGTGGGACATGATTGTCGCCGTCTGAGGCCCATAGATCCGC-AGGATGATCAATCTGCGTGCGTCCAGT | 9.37 |
| Apt-Nectin1-4 | AGTTGACGCTGGTGTGGGACGACGACGATAACCCCAGGAATGCAGCCCCAGAG-TTACCGTTCAATCTGCGTGCGTCCAGT | 9.37 |
| Apt-Nectin1-5 | AGTTGACGCTGGTGTGGGACCATCGTGACAGCTGTGACTGCCTTGAGTTAATA-TCCGTGGTCAATCTGCGTGCGTCCAGT | 8.33 |
| Apt-Nectin1-6 | AGTTGACGCTGGTGTGGGACCGACAAAATACAAGGTTATTTTTGCATCCGTCT-GAGGATCTCAATCTGCGTGCGTCCAGT | 7.29 |
), ArticleFig(id=1307282509679583607, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307013449213567637, language=CN, label=表3, caption=
候选核酸适配体序列
, figureFileSmall=null, figureFileBig=null, tableContent=
| 名称 Name | 序列(5′→3′) Sequence | 占比/% Percent |
|---|
| Apt-Nectin1-1 | AGTTGACGCTGGTGTGGGACCATCGTGACAGCTATGACTGCCTTGAGTTAATA-TCCGTGGTCAATCTGCGTGCGTCCAGT | 38.54 |
| Apt-Nectin1-2 | AGTTGACGCTGGTGTGGGACGTCTACACCCCAGGGAATGCAGACCCCAGGTGG-CACAGTATCAATCTGCGTGCGTCCAGT | 17.70 |
| Apt-Nectin1-3 | AGTTGACGCTGGTGTGGGACATGATTGTCGCCGTCTGAGGCCCATAGATCCGC-AGGATGATCAATCTGCGTGCGTCCAGT | 9.37 |
| Apt-Nectin1-4 | AGTTGACGCTGGTGTGGGACGACGACGATAACCCCAGGAATGCAGCCCCAGAG-TTACCGTTCAATCTGCGTGCGTCCAGT | 9.37 |
| Apt-Nectin1-5 | AGTTGACGCTGGTGTGGGACCATCGTGACAGCTGTGACTGCCTTGAGTTAATA-TCCGTGGTCAATCTGCGTGCGTCCAGT | 8.33 |
| Apt-Nectin1-6 | AGTTGACGCTGGTGTGGGACCGACAAAATACAAGGTTATTTTTGCATCCGTCT-GAGGATCTCAATCTGCGTGCGTCCAGT | 7.29 |
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