Article(id=1320889165550568228, tenantId=1146029695717560320, journalId=1260987677001138203, issueId=1320888908896907909, articleNumber=null, orderNo=null, doi=10.13386/j.issn1002-0306.2025040095, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1744128000000, receivedDateStr=2025-04-09, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1792854118000, onlineDateStr=2026-10-24, pubDate=1772294400000, pubDateStr=2026-03-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792854118000, onlineIssueDateStr=2026-10-24, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792854118000, creator=13701087609, updateTime=1792854118000, updator=13701087609, issue=Issue{id=1320888908896907909, tenantId=1146029695717560320, journalId=1260987677001138203, year='2026', volume='47', issue='5', pageStart='1', pageEnd='503', issueExtLink='null', onlineDate='null', pubDate='1772294400000', pubDateStr='2026-03-01', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792854056809, creator='13701087609', updateTime=1792854056809, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=328, endPage=338, ext={EN=ArticleExt(id=1320889165781254949, articleId=1320889165550568228, tenantId=1146029695717560320, journalId=1260987677001138203, language=EN, title=Nucleic Acid Hybridization-Lateral Flow Strip Combined with Double Tailed Isothermal Amplification for High-throughput Rapid Detection of Adulterated Animal-derived Components in Donkey Meat, columnId=1261343843585241413, journalTitle=Science and Technology of Food Industry, columnName=Analysis and Determination, runingTitle=null, highlight=null, articleAbstract=

Objective: To develop a multiplex visual meat adulteration detection method, dual-tailed recombinase polymerase amplification (RPA) with nucleic acid hybridization-lateral flow strip (NAH-LFS) was established for the simultaneous identification of chicken, pork, and horse derived components in donkey meat and its products. This RPA-NAH-LFS method met the requirements of meat adulteration detection for rapidity, simplicity, and low cost. Methods: Firstly, samples was prepared with different adulteration ratios and perform DNA extraction. The primer5 software was utilized to design specific primers targeting the mitochondrial cytochrome b (cytb) gene of chicken, pork, and horse. The primers included three functional regions: primer sequence, spacer9, and single-stranded DNA tag sequence (as a tailing sequence). Spacer9 could prevent the action of DNA polymerase, allowing the single-stranded DNA tag sequence to remain single-stranded after RPA amplification. Subsequently, colloidal gold nanoparticles were prepared and conjugated with recognition probes. NAH-LFS were then constructed. The RPA reaction conditions and the optimal working parameters were optimized for the LFS, followed by systematic validation of the sensitivity and specificity of the RPA-NAH-LFS. Finally, the established assay was applied to analyze 40 commercial donkey meat samples. Results: The optimal RPA conditions were determined as follows: reaction temperature of 39 ℃, incubation time of 10 min, Mg2+ (280 mmol/L) addition volume of 2.5 μL, and primer addition volumes of 0.7 μL (chicken), 0.7 μL (pork), and 1.0 μL (horse). The NC membrane with a flow rate of 33.75 cm/s and the running buffer 4 (0.01 mol/L PBS, pH8.0, 0.05% Tween-20) were selected as optimal conditions. The LFS had three test lines targeting for chicken (T1), pork (T2), and horse (T3). The detection process was completed within 15 min, which included RPA reaction (10 min) and LFS detection (5 min). The method could detect as little as 0.01% (w/w) chicken, pork, or horse meat in simulated adulterated donkey meat. Cross-reactivity test with 9 meat species demonstrated the excellent specificity of the assay. Analysis of the 40 commercial meat products revealed pork adulteration present in one sample, and simultaneous chicken and pork adulteration in another sample. These results were 100% consistent with those obtained by the standard detection method (DB42/T 1591-2020). Conclusion: The RPA-NAH-LFS technique, utilizing the dual-tailed primer design and a multiplex probe hybridization strategy, enables the simultaneous visual detection of meat adulterants. This method has high sensitivity, strong specificity, and operational convenience, making it particularly suitable for rapid on-site screening by basic-level regulatory agencies. It provides an efficient technology for detecting the authenticity of meat products.

, authors=Yani CHENG1, Linyao SUN1, Qing WANG1, Shengyu WANG1, Bingrui LIU2, *, Haibin LIU1, *, authorsList=Yani CHENG, Linyao SUN, Qing WANG, Shengyu WANG, Bingrui LIU, Haibin LIU, authorCompany=null, correspAuthors=Bingrui LIU, Haibin LIU, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright © 2026 Science and Technology of Food Industry. All rights reserved., 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=1320889167295398706, articleId=1320889165550568228, tenantId=1146029695717560320, journalId=1260987677001138203, language=CN, title=双拖尾恒温扩增结合核酸杂交侧流层析试纸条高通量快速检测驴肉中的掺假动物源性成分, columnId=1261343846139572559, journalTitle=食品工业科技, columnName=分析检测, runingTitle=null, highlight=null, articleAbstract=

目的:建立一种基于双拖尾重组聚合酶恒温扩增(recombinase polymerase amplification,RPA)结合核酸杂交侧流层析试纸条(nucleic acid hybridization-lateral flow strip,NAH-LFS)的多重可视化检测技术,用于同步鉴别驴肉及其制品中鸡、猪、马源性成分,满足快速检测、操作简便及低成本的需求。方法:首先制备不同掺假比例的样品并进行DNA提取。利用primer5软件设计针对鸡、猪、马线粒体细胞色素b(cytb)基因的特异性引物,引物包含3个功能区,即引物序列、spacer9间隔区和单链DNA标签序列(作为拖尾序列),spacer9可以阻止DNA聚合酶的作用使单链DNA标签序列在RPA扩增后仍保持单链状态。随后,制备胶体金纳米粒子并与识别探针偶联、构建核酸杂交侧流层析试纸条、优化RPA反应条件及试纸条的最佳工作条件,并对其检测灵敏度和特异性进行系统验证。最后,应用所建立的方法对40份市售驴肉样品进行检测。结果:RPA最佳反应温度为39 ℃,孵育时间是10 min,Mg2+(280 mmol/L)添加量为2.5 μL,鸡、猪、马引物(10 μmol/L)的加入量分别为0.7、0.7、1 μL。试纸条采用流速为33.75 cm/s型号的硝酸纤维素膜、流动缓冲液RB4(0.01 mol/L PBS pH8.0、0.05%吐温-20)时显色效果最佳。RPA-NAH-LFS可同时呈现T1(鸡源)、T2(猪源)、T3(马源)3条特征性检测线,总检测时间控制在15 min以内(含10 min扩增及5 min检测反应),对目标肉类的检测灵敏度达0.01%(w/w),对牛、羊等9种常见肉类无交叉反应。用RPA-NAH-LFS对40份市售驴肉样品检测结果显示,1份驴肉包子中检出猪肉和鸡肉成分,1份火锅驴肉卷中检出猪肉成分,检测结果与标准检测(DB42/T 1591-2020)结果完全一致。结论:RPA-NAH-LFS技术通过双拖尾引物设计与多重探针杂交策略,实现了肉类掺假成分的同步可视化检测。该方法兼具高灵敏度、强特异性和操作便捷性,特别适用于基层监管部门和现场快速筛查需求,为肉制品真实性鉴别提供了高效技术手段。

, authors=程雅妮1, 孙林瑶1, 王晴1, 王晟宇1, 刘丙蕊2, *, 柳海宾1, *, authorsList=程雅妮, 孙林瑶, 王晴, 王晟宇, 刘丙蕊, 柳海宾, authorCompany=null, correspAuthors=刘丙蕊, 柳海宾, authorNote=

程雅妮(2004−),女,大学本科,研究方向:食品安全快速检测,E-mail:

, correspAuthorsNote=
刘丙蕊(1984−),女,博士,副教授,研究方向:天然药物化学,E-mail:。
柳海宾(1987−),女,博士,副教授,研究方向:食品安全快速检测,E-mail:。
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程雅妮(2004−),女,大学本科,研究方向:食品安全快速检测,E-mail:

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程雅妮(2004−),女,大学本科,研究方向:食品安全快速检测,E-mail:

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Journal of Applied Microbiology, 2022, 132(5): 3685−3693., articleTitle=null, refAbstract=null), Reference(id=1320889176820663200, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=35, rfOrder=43, authorNames=null, journalName=null, refType=null, unstructuredReference=PRIYA G B, AGRAWAL R K, MILTON A A P, et al. Rapid and visual detection of Shiga-toxigenic Escherichia coli (STEC) in carabeef meat harnessing loop-mediated isothermal amplification (LAMP)[J]. Brazilian Journal of Microbiology, 2024, 55(2): 1723−1733., articleTitle=null, refAbstract=null), Reference(id=1320889176917132193, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=36, rfOrder=44, authorNames=null, journalName=null, refType=null, unstructuredReference=BAI Wenxia, CHEN Jie, CHEN Dong, et al. Sensitive and rapid detection of three foodborne pathogens in meat by recombinase polymerase amplification with lateral flow dipstick (RPA-LFD)[J]. International Journal of Food Microbiology, 2024, 422: 110822., articleTitle=null, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1320889167542862643, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, xref=1, ext=[AuthorCompanyExt(id=1320889167551251252, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, companyId=1320889167542862643, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1School of Life Science, North China University of Science and Technology, Tangshan 063210, China), AuthorCompanyExt(id=1320889167559639861, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, companyId=1320889167542862643, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1华北理工大学生命科学学院,河北唐山 063210)]), AuthorCompany(id=1320889167647720246, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, xref=2, ext=[AuthorCompanyExt(id=1320889167656108855, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, companyId=1320889167647720246, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2School of Public Health, North China University of Science and Technology, Tangshan 063210, China), AuthorCompanyExt(id=1320889167664497464, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, companyId=1320889167647720246, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2华北理工大学公共卫生学院,河北唐山 063210)])], figs=[ArticleFig(id=1320889169828758367, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=EN, label=Fig.1, caption=Composition and working principle of NAH-LFS, figureFileSmall=xZIacDuOAj8uOquOfUM9/w==, figureFileBig=v7onszBCDjZwh8jgT3C7KA==, tableContent=null), ArticleFig(id=1320889169916838752, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=CN, label=图1, caption=核酸杂交侧流层析试纸条的组成及工作原理, figureFileSmall=xZIacDuOAj8uOquOfUM9/w==, figureFileBig=v7onszBCDjZwh8jgT3C7KA==, tableContent=null), ArticleFig(id=1320889170139136865, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=EN, label=Fig.2, caption=Electrophoretic analysis results of primer screening, figureFileSmall=63ksZobBQmTnva8dD/yv3w==, figureFileBig=fAdNUQMDJ8wjoqT4lMqGAw==, tableContent=null), ArticleFig(id=1320889170218828642, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=CN, label=图2, caption=引物筛选的电泳分析结果

注:A为鸡引物对(C1~C4)的筛选结果,C1~C4代表不同序列的鸡引物对;B为猪引物对(P1~P4)的筛选结果,P1~P4代表不同序列的猪引物对;C为马引物对(H1~H4)的筛选结果,H1~H4代表不同序列的马引物对;M为D2000 DNA Marker。

, figureFileSmall=63ksZobBQmTnva8dD/yv3w==, figureFileBig=fAdNUQMDJ8wjoqT4lMqGAw==, tableContent=null), ArticleFig(id=1320889170285937507, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=EN, label=Fig.3, caption=Electrophoretic analysis results of RPA reaction parameter optimization, figureFileSmall=b6HyANdrv8bPBmTUNLQeOw==, figureFileBig=wuDvgrRv7zjimX4hLaKnuA==, tableContent=null), ArticleFig(id=1320889170348852068, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=CN, label=图3, caption=RPA反应条件优化的电泳分析结果

注:A(扩增温度优化):1~5分别对应37、38、39、40、41 ℃;B(孵育时间优化):1~4分别对应5、10、15、20 min;C(Mg2+加入量优化):1~4分别对应2.0、2.5、3.0、3.5 μL;D(引物加入量优化):1~4分别对应鸡、猪、马引物加入量为1、0.7、0.7 μL;0.7、0.7、1 μL;0.7、1、0.7 μL;0.7、0.7、0.7 μL;M为D2000 DNA Marker。

, figureFileSmall=b6HyANdrv8bPBmTUNLQeOw==, figureFileBig=wuDvgrRv7zjimX4hLaKnuA==, tableContent=null), ArticleFig(id=1320889170424349541, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=EN, label=Fig.4, caption=Optimization results of NC film type and RB parameters in NAH-LFS system, figureFileSmall=1UE8CjrLUHCa1HlVnqs7uQ==, figureFileBig=6YEJM21ToI8ruiGPynCzhA==, tableContent=null), ArticleFig(id=1320889170499847014, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=CN, label=图4, caption=NAH-LFS体系中NC膜型号和RB参数的优化结果

注:A(NC膜的优化):1~3分别对应VF=22.5、33.75、45 cm/s,N为阴性对照;B(RB的优化):1~4分别对应 RB1、RB2、RB3、RB4,N为阴性对照。

, figureFileSmall=1UE8CjrLUHCa1HlVnqs7uQ==, figureFileBig=6YEJM21ToI8ruiGPynCzhA==, tableContent=null), ArticleFig(id=1320889170579538791, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=EN, label=Fig.5, caption=Specificity validation of RPA on AGE (A) and RPA-NAH-LFS (B), figureFileSmall=4PaeqvoRBFGcvfCDHRf8hQ==, figureFileBig=IVm08ZyG6mnFnHtJheHRxw==, tableContent=null), ArticleFig(id=1320889170642453352, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=CN, label=图5, caption=RPA-AGE(A)与RPA-NAH-LFS(B)体系的物种特异性检测

注:M为D2000 DNA Marker,P为阳性对照(鸡源:504 bp、猪源:291 bp、马源:147 bp),1~9分别代表牛、鼠、兔、鸭、鹅、鱼、虾、羊、驴肉样本,N为阴性对照。

, figureFileSmall=4PaeqvoRBFGcvfCDHRf8hQ==, figureFileBig=IVm08ZyG6mnFnHtJheHRxw==, tableContent=null), ArticleFig(id=1320889170722145129, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=EN, label=Fig.6, caption=Sensitivity test of RPA on AGE (A) and NAH-LFS (B) for the detection of chicken, pork, and horse adulteration, figureFileSmall=1HakKbbRMgV81/n14aPN7Q==, figureFileBig=Yl5fHaGqYIQuMaCVYDQvCw==, tableContent=null), ArticleFig(id=1320889170789253994, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=CN, label=图6, caption=RPA-AGE(A)与RPA-NAH-LFS(B)对鸡、猪、马源性成分的灵敏度检测

注:A中M为D2000 DNA Marker;P为阳性模板对照,1~7分别代表驴肉基质中鸡、猪、马源性成分的掺假浓度梯度为30%、15%、10%、5%、1%、0.1%、0.01%,N为阴性对照;B中1~8分别代表驴肉基质中鸡、猪、马源性成分的掺假浓度梯度为30%、15%、10%、5%、1%、0.1%、0.01%、0.001%,N为阴性对照。

, figureFileSmall=1HakKbbRMgV81/n14aPN7Q==, figureFileBig=Yl5fHaGqYIQuMaCVYDQvCw==, tableContent=null), ArticleFig(id=1320889170856362859, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=EN, label=Table 1, caption=

Specific primer pairs designed for chicken, pork and horse species

, figureFileSmall=null, figureFileBig=null, tableContent=
物种组号正向引物序列(5'→3')反向引物序列(5'→3')
鸡C1CGTCTTCGTCCTCCTCCTAAGCTTCTGTGATGCTGTGGTGAG
C2CTCAGGGCGGCTTAGAATGACGAGGCGATTAGAAGGCTGT
C3GCCTTGCCAACCTTCATCTCTGAGTGTGAGGAGGAGGATTAC
C4CGGATATGGCATCATACGAGTCGTAAGAGGCGGTTAGGAGTGT
猪P1AGCCTAAATCTCCCCTCAATGCGTTTGGGTGTTGGGAATAG
P2CTCAATCCTCCTCGCCTCAGAGTGGTGGTTGGATGTGAAGT
P3AACTCGGAGGCTATGGCATAAGTTAGTGTTGGCTAGGCAGAAT
P4CTCAATCCTCCTCGCCTCAGGTGGTTGGATGTGAAGTGGAAT
马H1CTGCCTTCTCATCCGTCACTAGGAATGTGTAAGAGCCGTAGT
H2ATCGAGACTATCAGCCTATTTATTCAACCTCGTAATAAGGGCTGTTGAGGGGCTGATGC
H3GCCTTCTCATCCGTCACTCAAGGAATGTGTAAGAGCCGTAGT
H4CGACAACTGCCTTCTCATCCTGTGTAAGAGCCGTAGTAGAGG
), ArticleFig(id=1320889170952831852, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=CN, label=表1, caption=

针对鸡、猪、马3个物种设计的特异性引物对

, figureFileSmall=null, figureFileBig=null, tableContent=
物种组号正向引物序列(5'→3')反向引物序列(5'→3')
鸡C1CGTCTTCGTCCTCCTCCTAAGCTTCTGTGATGCTGTGGTGAG
C2CTCAGGGCGGCTTAGAATGACGAGGCGATTAGAAGGCTGT
C3GCCTTGCCAACCTTCATCTCTGAGTGTGAGGAGGAGGATTAC
C4CGGATATGGCATCATACGAGTCGTAAGAGGCGGTTAGGAGTGT
猪P1AGCCTAAATCTCCCCTCAATGCGTTTGGGTGTTGGGAATAG
P2CTCAATCCTCCTCGCCTCAGAGTGGTGGTTGGATGTGAAGT
P3AACTCGGAGGCTATGGCATAAGTTAGTGTTGGCTAGGCAGAAT
P4CTCAATCCTCCTCGCCTCAGGTGGTTGGATGTGAAGTGGAAT
马H1CTGCCTTCTCATCCGTCACTAGGAATGTGTAAGAGCCGTAGT
H2ATCGAGACTATCAGCCTATTTATTCAACCTCGTAATAAGGGCTGTTGAGGGGCTGATGC
H3GCCTTCTCATCCGTCACTCAAGGAATGTGTAAGAGCCGTAGT
H4CGACAACTGCCTTCTCATCCTGTGTAAGAGCCGTAGTAGAGG
), ArticleFig(id=1320889171028329325, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=EN, label=Table 2, caption=

Optimized primer sequences and probe configurations for the RPA-NAH-LFS system

, figureFileSmall=null, figureFileBig=null, tableContent=
物种寡核苷酸链名称序列(5'→3')参与反应扩增长度(bp)
鸡正向引物F-tag-chicken-FΔacttatacatacatataatgatg-spacer9-CTCAGGGCGGCTTAGAATGARPA504
反向引物R-tag-chicken-Raacttacacaatagtatctatat-spacer9-CGAGGCGATTAGAAGGCTGTRPA
识别探针Chicken-SH-probeCATCATTATATGTATGTATAAGTNAH-LFS
检测探针biotin-capture-CATATAGATACTATTGTGTAAGTTNAH-LFS
质控探针biotin-control-CΔACTTATACATACATATAATGATGNAH-LFS
猪正向引物F-tag-pig-FΔagtgtaacctcgtacactagatt-spacer9-AGCCTAAATCTCCCCTCAATGRPA291
反向引物R-tag-pig-Rgacatagatacatcgagatacag-spacer9-CGTTTGGGTGTTGGGAATAGRPA
识别探针Pig-SH-probeAATCTAGTGTACGAGGTTACACTNAH-LFS
检测探针biotin-capture-PCTGTATCTCGATGTATCTATGTCNAH-LFS
质控探针biotin-control-PΔAGTGTAACCTCGTACACTAGATTNAH-LFS
马正向引物F-tag-horse-FΔatgtatctgtccaaagtaagcca-spacer9-ATCGAGACTATCAGCCTATTTATTCAACCTRPA147
反向引物R-tag-horse-Rtccatcggcatagagaaagctac-spacer9-CGTAATAAGGGCTGTTGAGGGGCTGATGCRPA
识别探针Horse-SH-probeTGGCTTACTTTGGACAGATACATNAH-LFS
检测探针biotin-capture-HGTAGCTTTCTCTATGCCGATGGANAH-LFS
质控探针biotin-control-HΔATGTATCTGTCCAAAGTAAGCCANAH-LFS
), ArticleFig(id=1320889171099632494, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=CN, label=表2, caption=

基于RPA-NAH-LFS体系的物种特异性引物序列及探针组合设计

, figureFileSmall=null, figureFileBig=null, tableContent=
物种寡核苷酸链名称序列(5'→3')参与反应扩增长度(bp)
鸡正向引物F-tag-chicken-FΔacttatacatacatataatgatg-spacer9-CTCAGGGCGGCTTAGAATGARPA504
反向引物R-tag-chicken-Raacttacacaatagtatctatat-spacer9-CGAGGCGATTAGAAGGCTGTRPA
识别探针Chicken-SH-probeCATCATTATATGTATGTATAAGTNAH-LFS
检测探针biotin-capture-CATATAGATACTATTGTGTAAGTTNAH-LFS
质控探针biotin-control-CΔACTTATACATACATATAATGATGNAH-LFS
猪正向引物F-tag-pig-FΔagtgtaacctcgtacactagatt-spacer9-AGCCTAAATCTCCCCTCAATGRPA291
反向引物R-tag-pig-Rgacatagatacatcgagatacag-spacer9-CGTTTGGGTGTTGGGAATAGRPA
识别探针Pig-SH-probeAATCTAGTGTACGAGGTTACACTNAH-LFS
检测探针biotin-capture-PCTGTATCTCGATGTATCTATGTCNAH-LFS
质控探针biotin-control-PΔAGTGTAACCTCGTACACTAGATTNAH-LFS
马正向引物F-tag-horse-FΔatgtatctgtccaaagtaagcca-spacer9-ATCGAGACTATCAGCCTATTTATTCAACCTRPA147
反向引物R-tag-horse-Rtccatcggcatagagaaagctac-spacer9-CGTAATAAGGGCTGTTGAGGGGCTGATGCRPA
识别探针Horse-SH-probeTGGCTTACTTTGGACAGATACATNAH-LFS
检测探针biotin-capture-HGTAGCTTTCTCTATGCCGATGGANAH-LFS
质控探针biotin-control-HΔATGTATCTGTCCAAAGTAAGCCANAH-LFS
), ArticleFig(id=1320889171191907183, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=EN, label=Table 3, caption=

Optimal composition of the RPA reaction system

, figureFileSmall=null, figureFileBig=null, tableContent=
反应成分加入体积(µL)
Rehydration缓冲液29.5
正向引物-鸡(10 μmol/L)0.7
反向引物-鸡(10 μmol/L)0.7
正向引物-猪(10 μmol/L)0.7
反向引物-猪(10 μmol/L)0.7
正向引物-马(10 μmol/L)1.0
反向引物-马(10 μmol/L)1.0
DNA模板-鸡1.0
DNA模板-猪1.0
DNA模板-马1.0
冻干酶1粒
Mg2+(280 mmol/L)2.5
无菌水10.2
总体积50.0
), ArticleFig(id=1320889171271598960, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=CN, label=表3, caption=

RPA最优反应体系组分

, figureFileSmall=null, figureFileBig=null, tableContent=
反应成分加入体积(µL)
Rehydration缓冲液29.5
正向引物-鸡(10 μmol/L)0.7
反向引物-鸡(10 μmol/L)0.7
正向引物-猪(10 μmol/L)0.7
反向引物-猪(10 μmol/L)0.7
正向引物-马(10 μmol/L)1.0
反向引物-马(10 μmol/L)1.0
DNA模板-鸡1.0
DNA模板-猪1.0
DNA模板-马1.0
冻干酶1粒
Mg2+(280 mmol/L)2.5
无菌水10.2
总体积50.0
), ArticleFig(id=1320889171347096433, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=EN, label=Table 4, caption=

Testing results of commercial meat products using the RPA-NAH-LFS and the standard detection method

, figureFileSmall=null, figureFileBig=null, tableContent=
编号市售样品名称样品来源所标肉类成分检测结果
RPA-NAH-LFSDB42/T 1591-2020
鸡猪马鸡猪马
1酱香卤驴肉1餐馆−−−−−−
2酱香卤驴肉2餐馆−−−−−−
3酱香卤驴肉3餐馆驴肉−−−−−−
4酱香卤驴肉4街摊小吃−−−−−−
5酱香卤驴肉5街摊小吃−−−−−−
1驴肉火烧1街摊小吃−−−−−−
2驴肉火烧2街摊小吃−−−−−−
3驴肉火烧3街摊小吃驴肉−−−−−−
4驴肉火烧4餐馆−−−−−−
5驴肉火烧5餐馆−−−−−−
1驴肉包子1餐馆−−−−−−
2驴肉包子2餐馆−−−−−−
3驴肉包子3餐馆驴肉−−−−−−
4驴肉包子4餐馆++−++−
5驴肉包子5餐馆−−−−−−
1驴肉蒸饺1街摊小吃−−−−−−
2驴肉蒸饺2街摊小吃−−−−−−
3驴肉蒸饺3街摊小吃驴肉−−−−−−
4驴肉蒸饺4餐馆−−−−−−
5驴肉蒸饺5餐馆−−−−−−
1生鲜驴肉样品1屠宰场−−−−−−
2生鲜驴肉样品2屠宰场−−−−−−
3生鲜驴肉样品3屠宰场−−−−−−
4生鲜驴肉样品4屠宰场−−−−−−
5生鲜驴肉样品5屠宰场−−−−−−
6生鲜驴肉样品6超市驴肉−−−−−−
7生鲜驴肉样品7超市−−−−−−
8生鲜驴肉样品8超市−−−−−−
9生鲜驴肉样品9超市−−−−−−
10生鲜驴肉样品10超市−−−−−−
1火锅驴肉卷1淘宝网−−−−−−
2火锅驴肉卷2淘宝网−+−−+−
3火锅驴肉卷3淘宝网−−−−−−
4火锅驴肉卷4淘宝网−−−−−−
5火锅驴肉卷5淘宝网−−−−−−
6火锅驴肉卷6超市驴肉−−−−−−
7火锅驴肉卷7超市−−−−−−
8火锅驴肉卷8超市−−−−−−
9火锅驴肉卷9超市−−−−−−
10火锅驴肉卷10超市−−−−−−
), ArticleFig(id=1320889171426788210, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=CN, label=表4, caption=

基于RPA-NAH-LFS与标准检测方法对比的市售肉类制品检测结果

, figureFileSmall=null, figureFileBig=null, tableContent=
编号市售样品名称样品来源所标肉类成分检测结果
RPA-NAH-LFSDB42/T 1591-2020
鸡猪马鸡猪马
1酱香卤驴肉1餐馆−−−−−−
2酱香卤驴肉2餐馆−−−−−−
3酱香卤驴肉3餐馆驴肉−−−−−−
4酱香卤驴肉4街摊小吃−−−−−−
5酱香卤驴肉5街摊小吃−−−−−−
1驴肉火烧1街摊小吃−−−−−−
2驴肉火烧2街摊小吃−−−−−−
3驴肉火烧3街摊小吃驴肉−−−−−−
4驴肉火烧4餐馆−−−−−−
5驴肉火烧5餐馆−−−−−−
1驴肉包子1餐馆−−−−−−
2驴肉包子2餐馆−−−−−−
3驴肉包子3餐馆驴肉−−−−−−
4驴肉包子4餐馆++−++−
5驴肉包子5餐馆−−−−−−
1驴肉蒸饺1街摊小吃−−−−−−
2驴肉蒸饺2街摊小吃−−−−−−
3驴肉蒸饺3街摊小吃驴肉−−−−−−
4驴肉蒸饺4餐馆−−−−−−
5驴肉蒸饺5餐馆−−−−−−
1生鲜驴肉样品1屠宰场−−−−−−
2生鲜驴肉样品2屠宰场−−−−−−
3生鲜驴肉样品3屠宰场−−−−−−
4生鲜驴肉样品4屠宰场−−−−−−
5生鲜驴肉样品5屠宰场−−−−−−
6生鲜驴肉样品6超市驴肉−−−−−−
7生鲜驴肉样品7超市−−−−−−
8生鲜驴肉样品8超市−−−−−−
9生鲜驴肉样品9超市−−−−−−
10生鲜驴肉样品10超市−−−−−−
1火锅驴肉卷1淘宝网−−−−−−
2火锅驴肉卷2淘宝网−+−−+−
3火锅驴肉卷3淘宝网−−−−−−
4火锅驴肉卷4淘宝网−−−−−−
5火锅驴肉卷5淘宝网−−−−−−
6火锅驴肉卷6超市驴肉−−−−−−
7火锅驴肉卷7超市−−−−−−
8火锅驴肉卷8超市−−−−−−
9火锅驴肉卷9超市−−−−−−
10火锅驴肉卷10超市−−−−−−
), ArticleFig(id=1320889171514868595, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=EN, label=Table 5, caption=

Comparative performance analysis of methodologies for meat authenticity verification

, figureFileSmall=null, figureFileBig=null, tableContent=
方法时间仪器灵敏度优点缺点
电子鼻/电子舌5~15 min便携式气体传感器阵列5%快速、低成本、可现场操作准确度低(≤80%),易受温湿度影响,重复性差
近红外光谱10~30 min台式光谱仪+化学计量学软件3%可同时分析成分(水分/脂肪/蛋白)对加工肉敏感度低,需复杂预处理,水分干扰大
高光谱成像20~60 min高光谱相机+图像处理工作站1%具有空间分辨能力(定位掺假区域)数据冗余大,处理耗时,深层掺假分辨力弱
质谱法[31]1~3 hLC-MS/MS系统0.1%可多物种同步检测、结果较权威设备昂贵(>100万元)、需高级技术人员
免疫分析3~10 min胶体金试纸条+读卡器1%操作简单、无需专业培训仅定性/半定量,热加工样本易假阴性
PCR[32]1~3 h热循环仪0.1%高特异性;可定量;产物适用于测序依赖精密仪器;耗时;需温度循环
RCA[33]30 min~2 h恒温设备0.01%等温扩增;适用于环形模板(如质粒、病毒基因组)依赖预环化模板;多重扩增困难;
非特异性背景较高
CPA[34]40~60 min恒温设备0.1%等温扩增;灵敏度接近PCR引物设计复杂(需4~6条引物);优化难度大
LAMP[35]15~60 min恒温设备0.05%快速;高产物量;可视化检测(浊度/pH指示剂)引物设计复杂(需4~6条引物);易产生
气溶胶污染;产物难以直接测序
RPA[36]10~30 min恒温设备(或便携式仪器)0.01%超快速;常温反应(35~42 ℃);低能耗;适用于现场检测反应条件较严格;专利限制
), ArticleFig(id=1320889171657474932, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889165550568228, language=CN, label=表5, caption=

不同肉类真实性检测技术的性能对比分析

, figureFileSmall=null, figureFileBig=null, tableContent=
方法时间仪器灵敏度优点缺点
电子鼻/电子舌5~15 min便携式气体传感器阵列5%快速、低成本、可现场操作准确度低(≤80%),易受温湿度影响,重复性差
近红外光谱10~30 min台式光谱仪+化学计量学软件3%可同时分析成分(水分/脂肪/蛋白)对加工肉敏感度低,需复杂预处理,水分干扰大
高光谱成像20~60 min高光谱相机+图像处理工作站1%具有空间分辨能力(定位掺假区域)数据冗余大,处理耗时,深层掺假分辨力弱
质谱法[31]1~3 hLC-MS/MS系统0.1%可多物种同步检测、结果较权威设备昂贵(>100万元)、需高级技术人员
免疫分析3~10 min胶体金试纸条+读卡器1%操作简单、无需专业培训仅定性/半定量,热加工样本易假阴性
PCR[32]1~3 h热循环仪0.1%高特异性;可定量;产物适用于测序依赖精密仪器;耗时;需温度循环
RCA[33]30 min~2 h恒温设备0.01%等温扩增;适用于环形模板(如质粒、病毒基因组)依赖预环化模板;多重扩增困难;
非特异性背景较高
CPA[34]40~60 min恒温设备0.1%等温扩增;灵敏度接近PCR引物设计复杂(需4~6条引物);优化难度大
LAMP[35]15~60 min恒温设备0.05%快速;高产物量;可视化检测(浊度/pH指示剂)引物设计复杂(需4~6条引物);易产生
气溶胶污染;产物难以直接测序
RPA[36]10~30 min恒温设备(或便携式仪器)0.01%超快速;常温反应(35~42 ℃);低能耗;适用于现场检测反应条件较严格;专利限制
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双拖尾恒温扩增结合核酸杂交侧流层析试纸条高通量快速检测驴肉中的掺假动物源性成分
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程雅妮 1 , 孙林瑶 1 , 王晴 1 , 王晟宇 1 , 刘丙蕊 2, * , 柳海宾 1, *
食品工业科技 | 分析检测 2026,47(5): 328-338
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食品工业科技 |分析检测 2026 , 47 (5) : 328 -338
双拖尾恒温扩增结合核酸杂交侧流层析试纸条高通量快速检测驴肉中的掺假动物源性成分
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程雅妮1 , 孙林瑶1, 王晴1, 王晟宇1, 刘丙蕊2, * , 柳海宾1, *
作者信息
  • 1华北理工大学生命科学学院,河北唐山 063210
  • 2华北理工大学公共卫生学院,河北唐山 063210
通讯作者:
刘丙蕊(1984−),女,博士,副教授,研究方向:天然药物化学,E-mail:。
柳海宾(1987−),女,博士,副教授,研究方向:食品安全快速检测,E-mail:。
作者简介:

程雅妮(2004−),女,大学本科,研究方向:食品安全快速检测,E-mail:

Nucleic Acid Hybridization-Lateral Flow Strip Combined with Double Tailed Isothermal Amplification for High-throughput Rapid Detection of Adulterated Animal-derived Components in Donkey Meat
Yani CHENG1 , Linyao SUN1, Qing WANG1, Shengyu WANG1, Bingrui LIU2, * , Haibin LIU1, *
Affiliations
  • 1School of Life Science, North China University of Science and Technology, Tangshan 063210, China
  • 2School of Public Health, North China University of Science and Technology, Tangshan 063210, China
出版时间: 2026-03-01 doi: 10.13386/j.issn1002-0306.2025040095
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目的:建立一种基于双拖尾重组聚合酶恒温扩增(recombinase polymerase amplification,RPA)结合核酸杂交侧流层析试纸条(nucleic acid hybridization-lateral flow strip,NAH-LFS)的多重可视化检测技术,用于同步鉴别驴肉及其制品中鸡、猪、马源性成分,满足快速检测、操作简便及低成本的需求。方法:首先制备不同掺假比例的样品并进行DNA提取。利用primer5软件设计针对鸡、猪、马线粒体细胞色素b(cytb)基因的特异性引物,引物包含3个功能区,即引物序列、spacer9间隔区和单链DNA标签序列(作为拖尾序列),spacer9可以阻止DNA聚合酶的作用使单链DNA标签序列在RPA扩增后仍保持单链状态。随后,制备胶体金纳米粒子并与识别探针偶联、构建核酸杂交侧流层析试纸条、优化RPA反应条件及试纸条的最佳工作条件,并对其检测灵敏度和特异性进行系统验证。最后,应用所建立的方法对40份市售驴肉样品进行检测。结果:RPA最佳反应温度为39 ℃,孵育时间是10 min,Mg2+(280 mmol/L)添加量为2.5 μL,鸡、猪、马引物(10 μmol/L)的加入量分别为0.7、0.7、1 μL。试纸条采用流速为33.75 cm/s型号的硝酸纤维素膜、流动缓冲液RB4(0.01 mol/L PBS pH8.0、0.05%吐温-20)时显色效果最佳。RPA-NAH-LFS可同时呈现T1(鸡源)、T2(猪源)、T3(马源)3条特征性检测线,总检测时间控制在15 min以内(含10 min扩增及5 min检测反应),对目标肉类的检测灵敏度达0.01%(w/w),对牛、羊等9种常见肉类无交叉反应。用RPA-NAH-LFS对40份市售驴肉样品检测结果显示,1份驴肉包子中检出猪肉和鸡肉成分,1份火锅驴肉卷中检出猪肉成分,检测结果与标准检测(DB42/T 1591-2020)结果完全一致。结论:RPA-NAH-LFS技术通过双拖尾引物设计与多重探针杂交策略,实现了肉类掺假成分的同步可视化检测。该方法兼具高灵敏度、强特异性和操作便捷性,特别适用于基层监管部门和现场快速筛查需求,为肉制品真实性鉴别提供了高效技术手段。

肉类掺假  /  双拖尾重组聚合酶恒温扩增技术  /  核酸杂交侧流层析试纸条  /  可视化检测

Objective: To develop a multiplex visual meat adulteration detection method, dual-tailed recombinase polymerase amplification (RPA) with nucleic acid hybridization-lateral flow strip (NAH-LFS) was established for the simultaneous identification of chicken, pork, and horse derived components in donkey meat and its products. This RPA-NAH-LFS method met the requirements of meat adulteration detection for rapidity, simplicity, and low cost. Methods: Firstly, samples was prepared with different adulteration ratios and perform DNA extraction. The primer5 software was utilized to design specific primers targeting the mitochondrial cytochrome b (cytb) gene of chicken, pork, and horse. The primers included three functional regions: primer sequence, spacer9, and single-stranded DNA tag sequence (as a tailing sequence). Spacer9 could prevent the action of DNA polymerase, allowing the single-stranded DNA tag sequence to remain single-stranded after RPA amplification. Subsequently, colloidal gold nanoparticles were prepared and conjugated with recognition probes. NAH-LFS were then constructed. The RPA reaction conditions and the optimal working parameters were optimized for the LFS, followed by systematic validation of the sensitivity and specificity of the RPA-NAH-LFS. Finally, the established assay was applied to analyze 40 commercial donkey meat samples. Results: The optimal RPA conditions were determined as follows: reaction temperature of 39 ℃, incubation time of 10 min, Mg2+ (280 mmol/L) addition volume of 2.5 μL, and primer addition volumes of 0.7 μL (chicken), 0.7 μL (pork), and 1.0 μL (horse). The NC membrane with a flow rate of 33.75 cm/s and the running buffer 4 (0.01 mol/L PBS, pH8.0, 0.05% Tween-20) were selected as optimal conditions. The LFS had three test lines targeting for chicken (T1), pork (T2), and horse (T3). The detection process was completed within 15 min, which included RPA reaction (10 min) and LFS detection (5 min). The method could detect as little as 0.01% (w/w) chicken, pork, or horse meat in simulated adulterated donkey meat. Cross-reactivity test with 9 meat species demonstrated the excellent specificity of the assay. Analysis of the 40 commercial meat products revealed pork adulteration present in one sample, and simultaneous chicken and pork adulteration in another sample. These results were 100% consistent with those obtained by the standard detection method (DB42/T 1591-2020). Conclusion: The RPA-NAH-LFS technique, utilizing the dual-tailed primer design and a multiplex probe hybridization strategy, enables the simultaneous visual detection of meat adulterants. This method has high sensitivity, strong specificity, and operational convenience, making it particularly suitable for rapid on-site screening by basic-level regulatory agencies. It provides an efficient technology for detecting the authenticity of meat products.

meat adulteration  /  double tailed recombinase polymerase amplification technology  /  nucleic acid hybridization lateral flow strip  /  visual detection
程雅妮, 孙林瑶, 王晴, 王晟宇, 刘丙蕊, 柳海宾. 双拖尾恒温扩增结合核酸杂交侧流层析试纸条高通量快速检测驴肉中的掺假动物源性成分. 食品工业科技, 2026 , 47 (5) : 328 -338 . DOI: 10.13386/j.issn1002-0306.2025040095
Yani CHENG, Linyao SUN, Qing WANG, Shengyu WANG, Bingrui LIU, Haibin LIU. Nucleic Acid Hybridization-Lateral Flow Strip Combined with Double Tailed Isothermal Amplification for High-throughput Rapid Detection of Adulterated Animal-derived Components in Donkey Meat[J]. Science and Technology of Food Industry, 2026 , 47 (5) : 328 -338 . DOI: 10.13386/j.issn1002-0306.2025040095
在全球食品供应链高度融合的背景下,食品安全与产品真实性已成为国际性议题,其中肉类掺假问题因直接关系消费者权益及市场秩序而备受关注。驴肉制品凭借独特风味与优良质地拥有稳定的消费群体,但其养殖周期长、出栏率低导致市场供给有限且成本居高。2013年欧盟地区的“马肉风波”事件[1]以及市场上利用蒸、卤、腌、烤等方式掩盖掺假肉(如猪、鸡肉等)气味、口感等事件[2]的报道,揭示鸡肉、猪肉及马肉等易获取、低成本的动物源性成分逐渐成为高端肉类的主要掺假对象[3]。
针对此类掺假行为,现有检测技术主要涵盖电子感官技术(电子鼻[4]/电子舌[5])、免疫分析法[6]、近红外光谱检测技术[7]及DNA分子杂交法[8]等。然而,电子感官技术需结合机器学习算法且对微量掺假的识别能力有限;基于蛋白质靶标的免疫学方法虽具备良好的特异性与灵敏度,却易因加工过程中蛋白结构变性引发假阴性结果,且检测结果的重现性有待提升[9];近红外光谱检测的原理是基于分子振动产生的倍频和合频吸收,信号强度较弱,难以检测低浓度(如低于0.1%)的微量成分,且近红外分析属于间接方法,直接影响检测结果的准确性。相较于蛋白质,DNA分子在肉类细胞中分布广泛,其双螺旋结构在高温加工条件下仍保持高度稳定性,这使得基于DNA的溯源检测技术更具应用优势。当前以DNA为靶标的主流方法包括传统聚合酶链式反应(polymerase chain reaction,PCR)[10]、实时荧光定量PCR(qPCR)[11]及数字PCR[12],这些技术虽具有纳克级检测灵敏度与种属特异性,但依赖精密热循环设备与专业操作人员,难以满足市场监管中对于肉制品掺假的现场快速筛查需求。近年来快速发展的核酸等温扩增技术,凭借其仪器依赖性低、操作便捷、反应迅速及高灵敏度等优势[13],在分子检测领域展现出广阔应用前景。目前主流技术包括:重组聚合酶扩增(recombinase polymerase amplification,RPA)[14]、环介导等温扩增(loop-mediated isothermal amplification,LAMP)[15]、滚环扩增(rolling circle amplification,RCA)[16]及交叉引物扩增(cross primer amplification,CPA)[17]。其中,LAMP与RPA技术已在食品安全检测领域实现规模化应用。LAMP技术需在60~65 ℃恒温条件下通过4~6条特异性引物实现扩增,但其复杂的引物设计体系易导致非特异性扩增[18];相较之下,RPA技术仅需35~42 ℃恒温环境,可在20 min内完成扩增,且无需复杂温控设备。此外,RPA通过多重引物体系可同步扩增多靶标,在肉源检测中能展现出优异的特异性与灵敏度[19]。为提升检测便捷性,侧流层析技术(lateral flow strip,LFS)因其仪器非依赖性及可视化优势,已被整合应用于扩增产物的即时分析[20]。传统免疫层析法依赖抗原-抗体互作实现信号捕获,需在引物端标记荧光基团或地高辛等分子,同时固定化抗体的制备显著增加检测成本[21]。而基于核酸杂交的LFS通过互补序列特异性识别靶标DNA,不仅降低探针修饰成本,更延长试纸条储存稳定性,为现场检测提供经济高效的技术路径。
为此,本研究基于双拖尾重组聚合酶恒温扩增(double-tailed RPA)技术,开发了一种核酸杂交侧流层析试纸条(NAH-LFS)。该试纸条设计1条质控线(C线)和3条检测线(T线),通过C线显色指示有效性,T线显色实现驴肉制品中鸡、猪及马源性成分的多靶标同步检测。本技术(RPA-NAH-LFS)突破了传统PCR对热循环仪的依赖,且可以拓展应用于其他肉类中鸡、猪及马源性成分的快速检测,旨在建立一种无需专业环境的现场即时检测(point-of-care testing,POCT)方法。该体系具备双重应用维度:在消费端,其便携性支撑市场终端产品真实性快速筛查;在监管端,其简易的“采样-扩增-显色”流程便于大量样品的现场初筛,为肉制品质量监控提供关键技术支撑。
实验样本的生物材料 来源于唐山市域内多个规范渠道,具体包括:市售新鲜肉类(猪、牛、鸡、兔、鸭、鹅、鱼、虾及羊肉)采购自唐山市主要生鲜零售市场(包括综合超市、专业水产市场及屠宰场),特殊物种样本(驴、马肉)通过唐山市农产品批发市场获取,鼠源性组织样本由华北理工大学实验动物中心按需提供;琼脂糖(agarose gel,AG)(纯度99.90%)、链霉亲和素(streptavidin,SA)(纯度99.90%) 上海源叶生物科技有限公司;RPA扩增试剂 英国TwistDX公司;天根基因组DNA提取试剂盒 DP304,北京天根生物科技有限公司;三(2-羧乙基)膦盐酸盐(Tris(2-carboxyethyl)phosphine hydrochloride,TCEP) 纯度99.90%,上海麦克林生化科技股份有限公司;氯化钠(NaCl)(纯度99.50%)、4-(2-羟乙基)-1-哌嗪乙磺酸(HEPES)(500 mmol/L)、磷酸盐缓冲液(PBS)(pH3.0、7.2、7.6)、氯金酸(HAuCl4)、硝酸银(AgNO3)(纯度均≥99.00%) 上海依赫生物科技有限公司;柠檬酸钠(C6H5Na3O7) 纯度99.90%,上海阿拉丁试剂有限公司;聚氯乙烯(polyvinyl chloride, PVC)背板、玻璃纤维、吸水纸、硝酸纤维素(nitrocellulose,NC)膜 上海金标生物科技有限公司。
Milli-Q纯水系统 美国Millipore公司;TGem Pro(OSE-260-03)超微量分光光度计 天根生化科技(北京)有限公司;ZQ2000微电脑自动斩切机、HM3035双维往复化膜仪 上海金标生物科技有限公司;Gel Doc 2000凝胶成像系统 美国Bio-Rad公司;5418R高速离心机 德国Eppen-dorf公司;JA2003电子天平 精度为0.0001 g,宁波市力辰科技有限公司;ZK-4OBS真空干燥箱 天津三水仪器有限公司;KB-5010涡旋振荡器 海门市其林贝尔仪器制造有限公司;HX-20 恒温金属浴仪器 长沙巴跃仪器有限公司;nexus GSX1 PCR仪 德国艾本德股份公司;JY600电泳仪 北京君意东方电泳设备有限公司;TU-1900紫外可见光谱仪(UV-Vis仪器) 北京普析通用仪器有限责任公司;JEM-1400Flash透射电子显微镜(transmission electron microscope,TEM) 日本电子株式会社。
为确保实验数据的科学性与可重复性,本研究预先采购了驴、鸡、猪及马4种动物源性肉类原料,并进行预处理。具体处理步骤包括:首先使用蒸馏水将肉类清洗3次去除表面杂质,使用手术刀分割成10 g/份的小块,然后将驴、鸡、猪、马肉分别放在加入液氮的研钵中研磨成肉糜状态,以满足后续实验对样本均一性的要求。为模拟市场流通中常见的掺假肉样,本研究采用梯度掺杂法构建实验样本。掺杂比例以质量百分比(w/w)设定为8个梯度,具体为30%、15%、10%、5%、1%、0.1%、0.01%及0.001%。其中,掺杂物质为鸡、猪及马肉糜的等比例混合物,其总掺杂量以驴肉为基准进行配比。具体制备方法如下:
a.高浓度掺杂组(≥1%):以30%、15%、10%、5%及1%的质量百分比在驴肉中掺入鸡、猪、马肉成分。以30%(w/w)的掺假比例为例,精确称取30 g鸡肉、30 g猪肉及30 g马肉,与10 g纯驴肉基质混合(此时共100 g的肉,其中含鸡肉30 g,则鸡肉掺假为30%,猪肉与马肉掺假率按同等方式计算),其他比例的掺假肉组同样按此法制备。
b.超低浓度掺杂组(≤0.1%):采用逐级稀释法实现0.1%、0.01%及0.001%(w/w)的微量掺杂。以0.1%(w/w)组为例,取10 g已知1%掺杂浓度的混合样本(已知1%掺假肉样指10 g肉样中分别含有0.1 g鸡肉、0.1 g猪肉、0.1 g马肉),与90 g纯驴肉基质充分混匀(此时共100 g的肉,其中鸡肉0.1 g,则鸡肉掺假为0.1%,猪肉与马肉掺假率按同等方式计算)。同法依次制备0.01%及0.001%浓度组,该方法有效解决了微量掺杂样本制备中称量准确性问题。
所有样本制备过程中避免交叉污染,每批次样本经3次涡旋振荡(3000 r/min,5 min)确保均匀性。使用天根基因组DNA提取试剂盒提取肉类样品中的DNA,并将提取的DNA产物分装于1.5 mL无菌离心管中,于-20 ℃超低温冰箱保存,并于储存期间定期进行OD260/280比值检测(1.8~2.0)及200 V恒压下进行30 min的2%琼脂糖凝胶电泳(agarose gel electrophoresis,AGE)验证,确保DNA完整性符合后续分析要求。
本研究严格遵循RPA技术的引物设计规范,其具体实施流程如下:首先从NCBI GenBank数据库中精准检索并下载鸡(登录号:NC_040902.1)、猪(登录号:AF034253)、马(登录号:NC_001640.1)3个物种的线粒体基因序列。基于序列保守性片段、引物退火温度(Tm值)及发卡结构预测等参数,使用Primer Premier 5.0软件设计具有物种特异性的候选引物对(每物种设计4对)。利用BAC-browser v2.1软件随机生成6条单链核苷酸序列(分别用作3个物种正反向引物的拖尾序列),再根据碱基互补配对原则设计与拖尾序列互补的探针。将设计好的拖尾引物、生物素或巯基标记的探针交由江苏金唯智生物技术有限公司合成。通过RPA技术筛选扩增效率高且不产生非特异性扩增产物的引物序列用于后续实验。
采用传统柠檬酸钠还原氯金酸[22]的方法合成粒径约为20 nm的胶体金纳米粒子(gold nanopspheres,AuNPs),参考万涛等[23]的方法使用UV-Vis和TEM对制备好的金纳米粒子进行表征。参考曹婷婷等[24]的方法将巯基(SH)化的识别探针与AuNPs偶联,以AuNPs-鸡SH探针为例,将10 µL的鸡SH探针(100 µmol/L)与等体积的TCEP(10 mmol/L)混合均匀,室温下振荡反应1 h后加入1.33 mL AuNPs,混匀并孵育10 min,再用柠檬酸缓冲液(500 mmol/L,pH3.0)将溶液pH调整至3.0。继续在室温下孵育10 min,再用HEPES(500 mmol/L,pH7.6)将体系pH调节至7.6。接下来,在2.5 h内缓慢滴加 NaCl(2 mol/L),使体系中NaCl终浓度达到300 mmol/L,继续室温下孵育1 h。反应结束后以8000 r/min离心10 min,收集沉淀并重悬于200 µL缓冲溶液中(1 mmol/L Tris-HCl,pH7.6,1% BSA,0.5% Tween20,10%蔗糖)。以同样方法制备AuNPs-猪SH探针、AuNPs-马SH探针。最终以1:1:1的比例将3种偶联探针混合后以25 μL/cm的速度喷洒于结合垫上,室温下干燥3~6 h备用。
试纸条由5部分组成,包括样品垫、结合垫、NC膜、PVC背板及吸水纸。各组件依照图1所示顺序依次粘附于PVC背板上。在NC膜上设置了1条质控线(C线)和3条针对不同物种的检测线:T1(鸡源)、T2(猪源)和T3(马源)。具体操作步骤如下:首先,将生物素标记的3个物种的特异性检测探针(10 μL,100 μmol/L)分别与SA(7.5 μL,1.0 mg/mL)以及23 μL超纯水(ultrapure water,UP)混合,形成探针-生物素-链霉亲和素复合体。将复合物以0.9 μL/cm的量喷涂于NC膜上,形成3条独立的T线。T线上的检测探针能与对应目标扩增子反向引物上的拖尾序列结合,而该扩增子正向引物上的拖尾序列能与对应的偶联金纳米粒子的识别探针结合,因此T线会出现红色条带。对于C线,将生物素标记的鸡、猪、马质控探针按相同比例混合与SA孵育后,以同样方式喷涂在NC膜上。C线上的质控探针能与对应的偶联金纳米粒子的识别探针结合,因此C线会出现红色条带。所有检测线与质控线的间距保持在5 mm。完成喷涂后,NC膜置于37 ℃恒温干燥箱中进行至少3 h的固化处理,以增强探针复合物与NC膜的结合稳定性。最后,将组装好的试纸条裁切成宽度为3.7 mm的条带,并存放在适宜的干燥条件下以便后续实验使用。
通过系统性参数优化实验,对RPA反应体系的关键条件进行优化,以提升对鸡、猪、马模板DNA扩增效率。具体优化方案如下。
基于试剂盒推荐的温度区间(37~41 ℃),对三重RPA反应体系的最适温度进行筛选。反应体系中,MgAcO(280 mmol/L)的加入量为2.0 μL,鸡、猪、马三种引物(10 μmol/L)的加入量分别为0.7、0.7、1 μL,将配制完成的RPA反应液分别置于37、38、39、40、41 ℃恒温水浴中孵育15 min,随后通过2%琼脂糖凝胶电泳(200 V恒压,30 min)检测扩增产物的条带亮度。通过对比不同温度下目标条带的亮度,确定最佳反应温度。
在确定的最优反应温度下,进一步优化反应时间。反应体系中,MgAcO(280 mmol/L)及三种引物(10 μmol/L)的加入量均与1.2.5.1中的初始条件保持一致,将RPA反应体系分别孵育5、10、15、20 min,再通过2%琼脂糖凝胶电泳(200 V恒压,30 min)检测扩增产物的条带强度,以筛选出最佳孵育时间。
将试剂盒中的MgAcO(280 mmol/L)以不同的体积添加到反应体系中,添加量分别为2.0、2.5、3.0、3.5 μL,鸡、猪、马三种引物(10 μmol/L)的加入量均与1.2.5.1中的初始条件保持一致,在最优的温度和孵育时间下进行RPA扩增反应,结束后用2%琼脂糖凝胶电泳(200 V恒压,30 min)检测RPA产物条带的亮度,以确定最适的Mg2+加入量。
RPA反应总体积50 μL,对鸡、猪、马引物的加入量进行优化,引物浓度均为10 μmol/L。鸡、猪、马引物加入量如下:a.鸡、猪、马引物加入量分别为1、0.7、0.7 μL,b.鸡、猪、马引物加入量分别为0.7、0.7、1 μL,c.鸡、猪、马引物加入量分别为0.7、1、0.7 μL,d.鸡、猪、马引物加入量分别为0.7、0.7、0.7 μL。在最适的温度、孵育时间和MgAcO浓度下分别使用上述4种配比的引物对进行RPA反应,选取亮度最强的条带所对应的引物加入量用于后续实验。
通过系统性实验评估不同型号的NC膜与不同参数的流动缓冲液(running buffer,RB)对试纸条检测性能的影响,具体优化方案如下。
NC膜的流速(velocity of flow,VF)会对试纸条的显色效果产生影响。基于此,选择了3种NC膜(流速分别为22.5、33.75、45 cm/s)。向各型号NC膜的试纸条样品垫区域精确滴加100 μL混合液(含RPA扩增产物10 μL与流动缓冲液(0.01 mol/L PBS pH7.0)90 μL),5 min后观察并对比试纸条条带的清晰度以选择最佳型号的NC膜。
本实验在选用最佳型号NC膜的情况下设计4组RB(RB1~RB4):RB1为0.01 mol/L PBS pH7.0;RB2为0.01 mol/L PBS pH7.0、0.05%吐温-20;RB3为0.01 mol/L PBS pH8.0;RB4为0.01 mol/L PBS pH8.0、0.05%吐温-20。量取RB1~RB4 4种缓冲液各90 μL,分别与10 μL的RPA扩增产物混合,形成终体积为100 μL的待测液,将其滴加至试纸条的样品垫,5 min后观察试纸条条带清晰度以确定最佳的RB。
分别以3个目标物种:鸡、猪、马和9种非目标物种:牛、鼠、兔、鸭、鹅、鱼、虾、羊、驴的DNA为模板,进行RPA扩增。然后通过AGE和NAH-LFS两种方法对扩增产物进行检测,以检验本研究方法的特异性。具体来看,AGE检测是将扩增产物在200 V恒压下通过2%琼脂糖凝胶电泳30 min观察是否有对应条带的出现;NAH-LFS检测是将扩增产物与缓冲液混合后滴加至试纸条上样孔,观察对应的T线是否出现红色条带。此实验重复3次。
根据1.2.1中的方法,将鸡、猪和马肉按不同比例掺入驴肉,制作掺假驴肉样品。对各掺假比例的样品进行DNA提取和RPA扩增,然后通过AGE和NAH-LFS两种方法对扩增产物进行检测。以肉眼可清晰辨识到与阴性对照组有明显差别的条带所对应的模板浓度作为上述两种方法的最低检出限。为确保结果准确性,此实验重复进行3次。
为评估RPA-NAH-LFS技术的准确性与实际应用性,研究团队从多个渠道(唐山市生鲜市场、屠宰场、各大超市、餐馆、街摊小吃及淘宝网)采集了40份驴肉制品样本。对采集到的样本,进行基因组DNA的提取及RPA扩增,并用NAH-LFS对扩增产物进行检测,同时采用湖北省最新发布的针对畜禽肉及其肉制品中掺假动物源性成分检测的标准方法(DB42/T 1591-2020)进行验证,以综合判定本研究方法的可靠性与实用性。
各实验重复3次,实验数据均使用Microsoft Excel 2021进行初步整理与统计;使用BioRender软件进行图像绘制;电泳与试纸条系列图像使用智能手机(OPPO Find X7 Ultra)拍摄。
本研究采用Primer Premier 5.0软件,针对鸡、猪和马3个物种分别设计了4组引物,如表1。通过RPA扩增反应对各引物对进行验证,并利用2%AGE分析扩增产物,实验结果如图2所示。图2A呈现了鸡引物对经RPA扩增后的电泳结果,其中泳道2的DNA条带亮度最高,因此C2为鸡的最优引物对;图2B展示了猪引物对的扩增结果,泳道1的条带亮度显著高于其他泳道,表明引物对P1是猪的最适引物对;图2C显示马引物对的扩增电泳结果,泳道2的DNA条带最亮,因此选择引物对H2为马的最优引物对。基于上述实验数据,最终确定的最优引物对分别为鸡:引物对C2(正向引物:CTCAGGGCGGCTTAGAATGA,反向引物:CGAGGCGATTAGAAGGCTGT),猪:引物对P1(正向引物:AGCCTAAATCTCCCCTCAATG,反向引物:CGTTTGGGTGTTGGGAATAG)和马:引物对H2(正向引物:ATCGAGACTATCAGCCTATTTATTCAACCT,反向引物:CGTAATAAGGGCTGTTGAGGGGCTGATGC),各物种完整的最优引物对、识别探针、检测探针与质控探针序列信息详见表2。
为提升RPA扩增效率及特异性,对反应条件进行优化。结果如图3所示,图3A中,第3条泳道(39 ℃)条带最亮,因此确定39 ℃为RPA的最佳反应温度;图3B中,2、3、4泳道(分别为10、15、20 min)条带亮度相同,为缩短反应时间,选择10 min作为最佳反应时间;图3C中,第2条泳道(Mg2+加入量为2.5 μL)条带最亮,因此确定2.5 μL为最佳Mg2+加入量;图3D中,第2条泳道(鸡、猪、马引物加入量分别为 0.7、0.7、1 μL)条带最亮,确定其为最佳的引物体积。因此RPA的最优反应体系为扩增温度:39 ℃,孵育时间:10 min,Mg2+(280 mmol/L)加入量:2.5 μL,鸡、猪、马引物加入量:0.7、0.7、1 μL。具体试剂组分如表3所示。
通过对不同流速的NC膜及不同的RB进行试验,得到结果如图4所示。图4A中,2号试纸条(VF=33.75 cm/s)显色效果最佳;图4B中,4号试纸条(RB4)显色效果最佳。因此最终选用的NC膜流速为:VF=33.75 cm/s型,流动缓冲液为:RB4。
分别对鸡、猪、马及另外9种动物的DNA进行RPA扩增,并采用AGE和NAH-LFS同时对扩增产物进行检测,实验结果如图5所示。图5A AGE结果表明,当RPA体系中同时存在鸡、猪、马DNA时,分别在504 bp(鸡源)、291 bp(猪源)及147 bp(马源)位置观察到特异性扩增条带,而牛、羊等9种非目标物种DNA不能产生RPA扩增产物。图5B NAH-LFS检测结果显示,鸡、猪、马RPA扩增产物可同时使质控线(C线)与对应物种检测线(T1~T3)显色,其余物种扩增产物仅使C线显色(阴性判读标准),验证了RPA-NAH-LFS的检测特异性。
为系统评估检测灵敏度,对构建的梯度掺假样本(0.001%~30%,w/w)进行RPA-AGE和RPA-NAH-LFS检测。图6A结果显示,鸡、猪、马掺假比例≥0.1%(w/w)时,在AGE上有肉眼可见的特异性条带,而<0.1%(w/w)组未观察到明显条带。图6B NAH-LFS检测结果表明,当掺假比例≥0.01%(w/w)时,T1~T3检测线均呈现肉眼可见的红色条带,其可视化检测灵敏度较传统电泳技术提升10倍。因此,本研究建立的RPA-NAH-LFS体系可实现驴肉基质中0.01%(w/w)掺假比例的鸡、猪、马源性成分的同时检测,且检测时间缩短至15 min(包括10 min的PRA扩增与5 min的NAH-LFS检测)。
为验证RPA-NAH-LFS检测体系的实际应用性,本研究从唐山市生鲜市场、屠宰场、各大超市、餐馆、街摊小吃及淘宝网等多渠道获取40份驴肉制品,构建涵盖酱香卤驴肉(n=5)、驴肉火烧(n=5)、驴肉包子(n=5)、驴肉蒸饺(n=5)、生鲜驴肉(n=10)及火锅驴肉卷(n=10)的样本库。通过RPA-NAH-LFS方法检测发现,编号4的驴肉包子样本同时检出鸡源(T1)与猪源(T2)成分;编号2的火锅驴肉卷样本检出猪源(T2)成分。进一步采用湖北省最新发布的针对畜禽肉及肉制品中掺假动物源性成分检测的标准方法(DB42/T 1591-2020)对所有样本进行复检,结果显示两种方法检测结果100%一致,证实本研究方法对实际肉类样本检测的可靠性。表4详细展示了样本来源、加工类型及检测结果。本检测体系通过多靶标同步识别与可视化结果判读,为肉类制品真实性监管提供方法支持,其快速筛查能力与现场适应性凸显其在市场监管中的应用潜力。
肉类真实性鉴定研究领域,已有大量相关研究。赵静远等[25]利用高光谱成像的无损定量检测方法因操作简便、无需破坏样本等优势受到关注,但其实际应用有明显的局限性,如低灵敏度、弱抗干扰性及模型依赖性等,导致其难以替代主流分子生物学技术。陈东昌[26]开发的LAMP-免疫层析试纸条法虽能检测1 pg的鸡肉DNA,人工模拟肉类掺假的检测限为 0.12%(w/w),但因LAMP引物设计复杂且免疫层析试纸条成本较高,难以在现场即时检测中广泛使用;胡学佳[27]利用跨越式滚环恒温扩增技术(saltatory rolling circle amplification,SRCA)[28]检测牛肉中的马肉和猪肉,虽灵敏度达0.01%(w/w),却存在引物设计复杂、易产生副产物等局限性;CAO等[29]基于RPA结合SYBR Green I的荧光检测法虽实现1%(w/w)掺假水平的可视化检测,但其需要额外的荧光检测器。相比之下,本研究采用RPA与NAH-LFS结合的技术具有特异性强、灵敏度高、10 min快速扩增及引物设计简便等显著优势,更适合现场快速检测[30]。如表5所示,通过与其他多种方法进行系统的比较,RPA-NAH-LFS在检测速度、设备依赖性及操作复杂度等关键性能指标上均展现出显著优势。
本研究成功建立了一种基于双拖尾重组酶聚合酶恒温扩增(RPA)与核酸杂交侧流层析试纸条(NAH-LFS) 的多重可视化检测技术,实现了驴肉及其他肉类制品中鸡、猪、马源性成分的同步、快速鉴别。通过设计含spacer9间隔区与单链标签序列的双拖尾引物,结合胶体金探针杂交层析体系,可在15 min内完成“扩增-检测”全流程(10 min RPA扩增+5 min LFS显色),灵敏度达0.01%(w/w),且对牛、羊等9种非目标肉类无交叉反应。系统优化表明,该技术在39 ℃、特定Mg2+浓度(280 mmol/L)及定制引物配比条件下性能最优,并匹配高流速NC膜(33.75 cm/s)与专用缓冲液(RB4)以保障显色可靠性。经40份市售驴肉样品验证,所检出的猪肉与鸡肉成分与标准方法(DB42/T 1591-2020)结果完全一致,证实了本方法的准确性与实用性。同时,RPA-NAH-LFS技术还实现了三重创新设计:a.免热循环:突破PCR对仪器的依赖,实现恒温扩增;b.多靶标同步可视化:单次检测可并行输出3种掺假成分结果;c.现场适配性:操作简易、无需专业实验环境,满足POCT需求,为市场监管部门实施肉类真实性快速筛查提供了方法支持。

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2026年第47卷第5期
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doi: 10.13386/j.issn1002-0306.2025040095
  • 接收时间:2025-04-09
  • 首发时间:2026-10-24
  • 出版时间:2026-03-01
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  • 收稿日期:2025-04-09
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    1华北理工大学生命科学学院,河北唐山 063210
    2华北理工大学公共卫生学院,河北唐山 063210

通讯作者:

刘丙蕊(1984−),女,博士,副教授,研究方向:天然药物化学,E-mail:。
柳海宾(1987−),女,博士,副教授,研究方向:食品安全快速检测,E-mail:。
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2种不同金属材料的力学参数
科
Family
属数
Number of
genus
种数
Number of
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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