Article(id=1307007433335927171, tenantId=1146029695717560320, journalId=1306274286668972124, issueId=1307007396681900041, articleNumber=null, orderNo=null, doi=10.11843/j.issn.0366-6964.2026.01.030, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1742140800000, receivedDateStr=2025-03-17, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1789544455131, onlineDateStr=2026-09-16, pubDate=1769097600000, pubDateStr=2026-01-23, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1789544455131, onlineIssueDateStr=2026-09-16, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1789544455131, creator=13701087609, updateTime=1789544455131, updator=13701087609, issue=Issue{id=1307007396681900041, tenantId=1146029695717560320, journalId=1306274286668972124, year='2026', volume='57', issue='1', pageStart='1', pageEnd='568', issueExtLink='null', onlineDate='null', pubDate='1769097600000', pubDateStr='2026-01-23', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1789544446392, creator='13701087609', updateTime=1789609890784, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1307281890638057732, tenantId=1146029695717560320, journalId=1306274286668972124, issueId=1307007396681900041, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1307281890738721029, tenantId=1146029695717560320, journalId=1306274286668972124, issueId=1307007396681900041, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=349, endPage=359, ext={EN=ArticleExt(id=1307007434980094341, articleId=1307007433335927171, tenantId=1146029695717560320, journalId=1306274286668972124, language=EN, title=Preparation and Characterization of Nanobody against H7 Subtype Avian Influenza Virus, columnId=1307007432299930010, journalTitle=Acta Veterinaria et Zootechnica Sinica, columnName=PREVENTIVE VETERINARY MEDICINE, runingTitle=null, highlight=null, articleAbstract=
This study aimed to express a nanobody targeting H7-subtype avian influenza virus using an E. coli system. Nanobody and antigen expression vectors were constructed via homologous recombination. Recombinant vectors were amplified using E. coli DH5α, followed by transformation into E. coli BL21(DE3) and BEVS for high-yield protein production. Nanobodies and antigens were purified using streptavidin affinity chromatography and IMAC purification, respectively. Finally, immunofluorescence assay (IFA), enzyme-linked immunosorbent assay (ELISA), hemagglutination inhibition (HI) and surface plasmon resonance (SPR) were employed to analyze nanobody titer, specificity, immunoreactivity, and antigen-nanobody interaction dynamics. Expression vectors were successfully constructed, followed by the production of a 15 ku nanobody (D67), a 42 ku fluorescent nanobody (D67-GFP) and a 55 ku avian influenza antigen (H7-HA1). In IFA, H7-HA1-positive cells incubated with the nanobody exhibited significantly stronger green fluorescence signals compared to the control group. ELISA revealed significant OD450 signals exclusively in the H7-HA1 antigen group, with P/N ratios decreasing as D67 concentrations diminished. HI assays demonstrated specific hemagglutination inhibition only for the H7 antigen group, achieving a titer of 8log2. SPR analysis quantified the interaction kinetics, yielding an association rate of 3.99×103 L·(mol·s)⁻¹, dissociation rate of 3.23×10-3 s-1, and equilibrium dissociation constant of 8.1×10-7 mol·L⁻¹, confirming strong antigen-nanobody affinity.The H7-subtype-targeting nanobody D67 was successfully prepared and validated through a multidimensional evaluation system, demonstrating its high-efficiency and specific binding to H7-HA1. This work provides a technical foundation for developing rapid detection methods for H7-subtype avian influenza.
, authors=Chenying LUO, Siqi XU, Yutong LIU, Qinying ZHANG, Fengru DENG, Saixiang FENG, authorsList=Chenying LUO, Siqi XU, Yutong LIU, Qinying ZHANG, Fengru DENG, Saixiang FENG, authorCompany=null, correspAuthors=Saixiang FENG, authorNote=null, correspAuthorsNote=
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本研究旨在利用大肠杆菌系统表达出一种抗H7亚型禽流感病毒的纳米抗体。通过同源重组技术构建抗体表达载体和抗原表达载体,利用E. coli DH5α完成重组载体的扩增,接着分别将抗体表达载体和抗原表达载体转入大肠杆菌表达系统和昆虫细胞表达系统实现蛋白的高效表达,随后分别用链霉亲和素层析法和IMAC法对抗体和抗原进行纯化。最后,利用免疫荧光试验(IFA)、酶联免疫吸附试验(ELISA)、血凝抑制试验(HI)和表面等离子共振(SPR)分析抗体的效价、特异性、免疫反应性及与抗原的相互作用力。结果显示:成功构建了抗体表达载体和抗原表达载体,表达出大小为15 ku的纳米抗体D67、大小为42 ku的荧光纳米抗体D67-GFP和大小为55 ku的禽流感抗原H7-HA1;用IFA检测抗体的免疫反应性,经纳米抗体孵育后的H7-HA1阳性细胞呈现出显著高于对照组的绿色荧光;用ELISA检测抗体的特异性,仅H7-HA1抗原组出现明显OD450 nm,且P/N值随着D67抗体浓度降低而下降;用HI检测抗体的效价和特异性,仅H7抗原组出现明显血凝抑制效应,效价为8log2;用SPR检测抗原-抗体相互作用力,得结合常数为3.99×10³ L·(mol·s)⁻¹,解离常数为3.23×10⁻³ s-1,亲和力常数KD为8.1×10-7 mol·L-1,抗原抗体间存在强效亲和作用。本研究成功制备抗H7亚型禽流感的纳米抗体D67,并通过多维评估体系证明了D67可与H7-HA1抗原实现高效特异结合,可为建立H7亚型禽流感的快速检测方法提供技术基础。
, authors=罗琛滢, 许斯祺, 刘宇彤, 张沁莹, 邓凤如, 冯赛祥, authorsList=罗琛滢, 许斯祺, 刘宇彤, 张沁莹, 邓凤如, 冯赛祥, authorCompany=null, correspAuthors=冯赛祥, authorNote=
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罗琛滢,硕士生,主要从事纳米抗体的开发与应用研究,E-mail:827528057@qq.com
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罗琛滢,硕士生,主要从事纳米抗体的开发与应用研究,E-mail:827528057@qq.com
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Science,2021,372(6544):784-786., articleTitle=null, refAbstract=null), Reference(id=1307286616310046885, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[32], rfOrder=35, authorNames=null, journalName=null, refType=null, unstructuredReference=谢倩梅.酵母表面展示H5亚型禽流感病毒纳米抗体载体的构建和应用[D].广州:华南农业大学,2023., articleTitle=null, refAbstract=null), Reference(id=1307286616381350054, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, 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=XIE Q M.Construction and application of yeast surface display about the nanobody vector of H5 influenza virus[D].Guangzhou:South China Agricultural of University,2023.(in Chinese), articleTitle=null, refAbstract=null), Reference(id=1307286616440070311, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[33], rfOrder=37, authorNames=null, journalName=null, refType=null, unstructuredReference=MUYLDERMANS S.Nanobodies:natural single-domain antibodies[J].
Annu Rev Biochem,2013,82:775-797., articleTitle=null, refAbstract=null)], funds=[Fund(id=1307286611868278913, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, awardId=2022YFD1801003, language=CN, fundingSource=国家重点研发计划项目(2022YFD1801003), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1307286601365741639, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, xref=null, ext=[AuthorCompanyExt(id=1307286601382518856, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, companyId=1307286601365741639, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=National and Local Joint Engineering Laboratory for Zoonosis Prevention and Control Biologics,College of Veterinary Medicine,South China Agricultural University,Guangzhou 510620,China), AuthorCompanyExt(id=1307286601395101769, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, companyId=1307286601365741639, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=华南农业大学兽医学院,人兽共患病防控制剂国家地方联合工程实验室,广州 510620)])], figs=[ArticleFig(id=1307286610635153521, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, language=EN, label=Fig.1, caption=
The construction and identification of nanobody expression vectorA. The PCR amplification results of D67 and D67-GFP (M. DL2000 DNA marker; 1-4. D67 gene; 5-8. D67-GFP gene); B. The colony PCR results of DH5α (M. DL2000 DNA marker; 1.D67 gene; 2. D67-GFP gene); C. The colony PCR result of BL21 (M. DL2000 DNA marker; 1. D67 gene); D. The colony PCR result of BL21(M. DL2000 DNA marker; 1. D67-GFP gene)
, figureFileSmall=WFhc9/+W+VN3flhkbPbszA==, figureFileBig=hGGwvJMAmZfrtzFBbZPKLA==, tableContent=null), ArticleFig(id=1307286610693873778, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, language=CN, label=图1, caption=
抗体表达载体的构建与鉴定A. D67和D67-GFP的PCR扩增结果(M. DL2000 DNA相对分子质量标准;1~4.D67基因;5~8. D67-GFP基因);B. DH5α的菌落PCR鉴定结果(M. DL2000 DNA相对分子质量标准;1. D67基因;2. D67-GFP基因);C. BL21的菌落PCR鉴定结果(M. DL2000 DNA相对分子质量标准;1. D67基因);D. BL21的菌落PCR鉴定结果(M.DL2000 DNA相对分子质量标准;1. D67-GFP基因)
, figureFileSmall=WFhc9/+W+VN3flhkbPbszA==, figureFileBig=hGGwvJMAmZfrtzFBbZPKLA==, tableContent=null), ArticleFig(id=1307286610781954163, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, language=EN, label=Fig.2, caption=
SDS-PAGE results of nanobodies D67 and D67-GFP against H7 subtype avian influenza virusA. The SDS-PAGE result of nanobody D67(M. Protein marker; 1. D67); B. The SDS-PAGE result of nanobody D67-GFP(M. Protein marker; 1. D67-GFP)
, figureFileSmall=kVk7WbgC1oQocEZVmCcerw==, figureFileBig=dQiNvDUxDn+YxHXm5Syh1w==, tableContent=null), ArticleFig(id=1307286610853257332, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, language=CN, label=图2, caption=
H7亚型禽流感病毒纳米抗体D67和D67-GFP的SDS-PAGE鉴定结果A.纳米抗体D67的SDS-PAGE鉴定结果(M.蛋白相对分子质量标准;1.纳米抗体D67);B.纳米抗体D67-GFP的SDS-PAGE鉴定结果(M.蛋白相对分子质量标准;1.纳米抗体D67-GFP)
, figureFileSmall=kVk7WbgC1oQocEZVmCcerw==, figureFileBig=dQiNvDUxDn+YxHXm5Syh1w==, tableContent=null), ArticleFig(id=1307286610932949109, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, language=EN, label=Fig.3, caption=
The construction and identification of antigen expression vector FastBac-Dual-H7-HA1A. The PCR amplification result of H7-HA1 (M. DL2000 DNA marker; 1.H7-HA1 gene); B. The blue-white spot screening results of DH10Bac; C. The PCR amplification result of DH10Bac(M. DL5000 DNA marker; 1.the colony of DH10Bac)
, figureFileSmall=SH56tdq98AcQE4hfli/lPQ==, figureFileBig=nMIVe4z3ymufgBz6np8Oow==, tableContent=null), ArticleFig(id=1307286611000057974, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, language=CN, label=图3, caption=
抗原表达载体pFastBac-Dual-H7-HA1的构建与鉴定A. H7-HA1的PCR扩增结果(M.DL2000 DNA相对分子质量标准; 1.H7-HA1基因);B. DH10Bac的蓝白斑筛选鉴定结果;C. DH10Bac的菌落PCR鉴定结果(M. DL5000 DNA相对分子质量标准;1.DH10Bac菌落)
, figureFileSmall=SH56tdq98AcQE4hfli/lPQ==, figureFileBig=nMIVe4z3ymufgBz6np8Oow==, tableContent=null), ArticleFig(id=1307286611083944055, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, language=EN, label=Fig.4, caption=
The SDS-PAGE result of the H7 subtype avian influenza virus antigen H7-HA1M. Protein marker; 1. H7-HA1
, figureFileSmall=ZpIId1znNeynpiqXd602Rg==, figureFileBig=znJEbxjnRZqRysw6ulM2cA==, tableContent=null), ArticleFig(id=1307286611142664312, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, language=CN, label=图4, caption=
H7亚型禽流感病毒抗原H7-HA1的SDS-PAGE鉴定结果M.蛋白相对分子质量标准; 1. H7-HA1
, figureFileSmall=ZpIId1znNeynpiqXd602Rg==, figureFileBig=znJEbxjnRZqRysw6ulM2cA==, tableContent=null), ArticleFig(id=1307286611213967481, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, language=EN, label=Fig.5, caption=
The immunofluorescence results of nanobody D67-GFP against H7 subtype avian influenza virusA. Treatment group; B. Control group. Bar=100 μm
, figureFileSmall=ekYaZSzUISSTMhVzS2aDfA==, figureFileBig=DfSrA5TWauo0RgAo2Fymsw==, tableContent=null), ArticleFig(id=1307286611281076346, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, language=CN, label=图5, caption=
H7亚型禽流感病毒纳米抗体D67-GFP的免疫荧光检测结果A.试验组; B.对照组。标尺=100 μm
, figureFileSmall=ekYaZSzUISSTMhVzS2aDfA==, figureFileBig=DfSrA5TWauo0RgAo2Fymsw==, tableContent=null), ArticleFig(id=1307286611364962427, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, language=EN, label=Fig.6, caption=
The ELISA result of nanobody D67 against H7 subtype avian influenza virus, figureFileSmall=5/XntEhdEGquNSxDVpHfFw==, figureFileBig=kf2Xj+K4dszZ+69/kuuSKA==, tableContent=null), ArticleFig(id=1307286611440459900, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, language=CN, label=图6, caption=
H7亚型禽流感病毒纳米抗体D67的ELISA检测结果, figureFileSmall=5/XntEhdEGquNSxDVpHfFw==, figureFileBig=kf2Xj+K4dszZ+69/kuuSKA==, tableContent=null), ArticleFig(id=1307286611503374461, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, language=EN, label=Fig.7, caption=
The HI result of nanobody D67 against H7 subtype avian influenza virusA. H7-HA1 antigen group; B. H5 Re-8 antigen group; C. H9 Re-9 antigen group
, figureFileSmall=odLiR4qLH9jeLHZ+iPYbVg==, figureFileBig=dNLhPr++C/xSqK53uxzgxA==, tableContent=null), ArticleFig(id=1307286611574677630, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, language=CN, label=图7, caption=
H7亚型禽流感病毒纳米抗体D67的血凝抑制试验结果A. H7-HA1抗原组;B. H5 Re-8抗原组;C. H9 Re-9抗原组
, figureFileSmall=odLiR4qLH9jeLHZ+iPYbVg==, figureFileBig=dNLhPr++C/xSqK53uxzgxA==, tableContent=null), ArticleFig(id=1307286611645980799, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, language=EN, label=Fig.8, caption=
The SPR results of nanobody D67 against H7 subtype avian influenza virusA. Molecular interaction kinetic curve graph; B. Affinity curve graph
, figureFileSmall=PJnjuxIMhDj3FA0W9tOTYw==, figureFileBig=EEpoTpbkin+ieJ9Xct0IIA==, tableContent=null), ArticleFig(id=1307286611721478272, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307007433335927171, language=CN, label=图8, caption=
H7亚型禽流感病毒纳米抗体D67的表面等离子共振检测结果A.分子互作动力学曲线图;B.亲和力曲线图
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