柯萨奇病毒A组16型抗原的ELISA定量检测方法建立

目的:建立柯萨奇病毒A组16型(CA16)抗原的双抗体夹心ELISA定量检测方法,用于CA16灭活疫苗的研发和生产过程的抗原定量检测。方法:以CA16中和单抗T26H12为包被抗体、NA14B9为标酶抗体,构建定量检测CA16抗原的双抗体夹心ELISA方法,并对方法的特异性、灵敏度、精密度、准确性、线性和稳定性进行分析。结果:建立了双抗体夹心定量检测CA16抗原的ELISA方法。方法的线性相关系数R2=0.998,线性范围为8～128 ng/ml,定量限度为8 ng/ml;变异系数CV<15%;回收率介于87.0%～113.8%之间;37℃6天的回收率>80%;与CA16以外的其他样本没有交叉反应。结论:构建的CA16抗原ELISA定量检测方法的各项性能符合定量检测需要,可用于CA16疫苗的研发和生产过程的抗原活性的定量检测。     

汉城病毒L99株双抗体夹心ELISA抗原检测方法的建立及应用

目的:建立汉城病毒(Seoul virus, SEOV)L99株特异性双抗体夹心ELISA抗原检测方法,验证其检测性能,为双价肾综合征出血热(hemorrhagic fever with renal syndrome, HFRS)疫苗研制、生产和检定过程中Ⅱ型病毒抗原含量检测提供有效手段。方法:小鼠体内诱生法制备L99...     

新型冠状病毒抗原检测双抗体夹心ELISA方法的建立

目的:探索即时、快速、准确的新型冠状病毒(2019-nCoV)抗原检测方法,提高新型冠状病毒感染者检出率,并建立2019-nCoV的S蛋白特异性检测方法。方法:本研究利用ELISA方法对前期研发的2019-nCoV基因工程单克隆抗体(mAb)进行配对检测,从中挑选出最优检测抗体组合,建立了新型冠状病毒抗原检测双抗体夹心...     

水痘-带状疱疹病毒感染实验检测方法的研究进展

对临床表现不典型的可疑水痘-带状疱疹病毒(VZV)感染,需依靠实验室榆查才能确诊.因此,建立敏感、特异、快速和简便的VZV实验检测方法,对VZV感染者的早期诊断和预后具有重要意义.VZV的实验检测方法包括Tzanck涂片、电镜和免疫电镜、病毒分离、免疫学、分子生物学等方法,各方法均有其优点和不足.     

水痘-带状疱疹病毒减毒机制的研究进展

水痘．带状疱疹病毒（varicella．zostervirus,VZV）属人类疱疹病毒α亚科,亦称人类疱疹病毒3型（humanherpesvirus3,HHV-3）,是水痘和带状疱疹的病原体。     

用ELISA微板法检测乙型肝炎病毒核心抗原

以双抗体包被的抗体夹心法，用微板ＥＬＩＳＡ检测血清乙型肝炎病毒核心抗原（ＨＢＣＡｇ），确定双包被工作浓度ＭＣ－抗－ＨＢｃ（效价１０００）为０．０４μｌ／孔，ＭＣ－抗－ＨＢｓ（１ｍｇ／ｍｌ）为３～４μｌ／孔；最佳裂解剂及其工作浓度为７％ＮＰ－４０巯基乙醇溶液。分别用不同的酶标记抗体检测，均证明双包被具有特异性。加入抗－ＨＢｃ进行阻断试验，其阻断率为７９．３％。对８４４例ＨＢｓＡｇ阴性的血清及１１４例ＨＢＶ－ＤＮＡ探针阴性血清用本法进行ＨＢｃＡｇ检测，均为阴性。在临床应用上，本法的阳性率明显高于试管法的，与ＨＢＶ－ＤＮＡ探针的阳性符合率为９１．４％，并且特异性与ＨＢＶ－ＤＮＡ探针的一致。     

水痘-带状疱疹病毒免疫逃避机制的研究进展

水痘-带状疱疹病毒属人类a疱疹病毒，在感染机体过程中通过MHE-Ⅰ限制的抗原表达抑制、MHE-Ⅱ限制的抗原表达抑制、树突状细胞和角质形成细胞表面免疫分子改变、干扰凋亡过程以及潜伏等机制逃避免疫监视，使病毒有足够的时间复制、传播和引起皮损，或者长期潜伏于神经节。本文拟就有关内容作一综述。     

CV-A5抗体制备及ELISA抗原检测方法的建立

目的:制备柯萨奇病毒A组5型(CV-A5)多克隆抗体和单克隆抗体,建立CV-A5抗原定量ELISA检测方法,用于CV-A5疫苗研制中抗原定量及质量控制.方法:纯化后的CV-A5全病毒颗粒作为免疫原,制备兔多克隆抗体并免疫BALB/c小鼠,采用常规细胞融合技术制备、中和试验和ELISA法筛选获得CV-A5单克隆抗体.建立...     

水痘-带状疱疹病毒基因分型研究进展

水痘-带状疱疹病毒(varicella-zoster virus,VZV)属人类疱疹病毒α亚科,又称人类疱疹病毒3型(HHV-3),是水痘和带状疱疹的病原体.VZV的原发感染引起水痘,水痘痊愈后可获终生免疫.但VZV原发感染后,病毒可沿感觉神经上行至一个或多个脊髓后根和三叉神经节内形成潜伏感染.当机体免疫力降低时病毒可被再激活并沿神经轴突到达相应神经支配皮肤区域,引起带状疱疹[1].     

蛋白酶K单抗研制及其双抗体夹心ELISA定量检测方法的建立

目的 研制蛋白酶K单克隆抗体并构建定量检测蛋白酶K的双抗体夹心ELISA方法 ,用于生物制品中蛋白酶K的检测。方法 用杂交瘤技术制备抗蛋白酶K的单抗,用棋盘法优化ELISA条件,建立定量检测蛋白酶K的双抗体夹心ELISA方法,分析其特异性、精密性和准确性。结果 经免疫、融合、克隆、筛选到稳定分泌蛋白酶K单抗的杂交瘤细胞。获得1株阻断蛋白酶K活性的单抗5G6,以5G6为包被抗体、4D3为酶标抗体,构建蛋白酶K定量检测的ELISA方法。本方法线性相关系数R=0.99,线性范围为293.4~2 500 pg/ml;定量限度为293.4 pg/ml;变异系数为CV<15%;回收率介于89.3%~129.2%之间,37℃6 d的回收率>80%;与蛋白酶K以外的其他蛋白无交叉反应。结论 获得阻断蛋白酶K活性的单抗,构建出灵敏、特异的蛋白酶K定量检测方法。     

Diagnostic Usefulness of Varicella Zoster Virus-Specific Immunoglobulin (Ig) A and IgG in Patients With Herpes Zoster

BackgroundWhether varicella zoster virus (VZV) antibody titer could discriminate patients with herpes zoster (HZ) from healthy controls (HCs) is unclear. We evaluated the diagnostic usefulness of VZV-specific immunoglobulin A (IgA) and immunoglobulin G (IgG) antibodies in patients with confirmed HZ.MethodsStudy subjects comprised patients with confirmed HZ by salivary VZV DNA positivity and control age- and sex-matched HCs. Saliva was collected and concurrent blood samples were obtained on the first visit day (acute phase) and after 4 weeks (convalescent phase) from 44 HZ patients. All 44 healthy volunteers provided blood and saliva samples once.ResultsThe median VZV IgA titers in acute-phase (5.2 mIU/mL, P < 0.001) and convalescent-phase (15.8 mIU/mL, P < 0.001) serum samples from HZ patients were significantly higher than those in HCs (1.35 mIU/mL). VZV IgA positivity was detected in about 20% of acute phase serum and convalescent-phase serum of HZ patients. The median VZV IgG antibody titers of HZ patients during acute (1,471.0 mIU/mL, P < 0.001) and convalescent (4,934.7 mIU/mL, P < 0.001) phases were significantly higher than the median titer reported for HCs (591.6 mIU/mL). A four-fold or higher increase in VZV IgG antibody titer was observed in 36.4% of HZ patients.ConclusionVZV IgA positivity or four-fold or higher increase in VZV IgG antibody titers were not detected in a satisfactory proportion of HZ-infected patients. However, the titer of VZV IgA or IgG antibody particularly in convalescent-phase sera may discriminate HZ patients from HCs.     

肠道病毒71抗原ELISA检测方法构建及其应用

目的 建立肠道病毒71型(EV71)抗原的ELISA检测方法.用于EV71的抗原定量、TCID50试验及EV71免疫原性与免疫保护性的关系分析.方法 以高亲和力的EV71中和单抗K8G2和Y8H2-HRP构建检测EV71抗原的双抗体夹心ELISA方法.比较本方法与显微镜观察法检测的EV71 TCID50.分析EV71抗原的特异比活与免疫血清中和抗体水平的关系.结果 本试剂定量检测抗原的线性范围为0.125 ～4.0 U/ml,R2 =0.9911,试剂不与EV71之外的受试物反应,试剂的回收率为0.89 ～ 1.16,变异系数小于15％,37℃9 d的热回收率大于85％.本法与显微镜观察法检测的EV71 TCID50的相关系数r=0.990.21株EV71抗原的特异比活与免疫血清中和抗体水平的相关系数r=0.930.结论 构建了EV71抗原ELISA检测试剂,可用于EV71的抗原含量检测、TCID50分析,为特异比活与免疫血清中和性关系研究提供了一些有价值的信息.     

测定尿激酶含量夹心法ELISA的建立

采用两种识别不同抗原决定簇的抗尿激酶(UK)单克隆抗体建立了测定人 UK 含量的夹心法ELISA.本法灵敏度为0.15ng/ml,批内 CV4.3%,批间 CV8.7%,平均回收率98%.应用本法测定了部分正常细胞和肿瘤细胞株培养上清中的 UK 含量,肿瘤细胞培养上清 UK 量明显高于正常细胞.测定82名正常人血浆中 UK 含量,其结果为1.31±0.6ng/ml.     

Development of a monoclonal antibody-based sandwich ELISA for the detection of ovalbumin in foods

Hen egg is one of the most frequent causes of food allergy in infants and adults. Ovalbumin (OVA) has been identified as a major egg allergen. In order to detect OVA in foods, a highly sensitive sandwich enzyme-linked immunosorbent assay (ELISA) based on two monoclonal antibodies (mAbs) was established. The 2 mAbs were selected out of 17 murine hybridomas secreting OVA-specific antibody. Using mAb17 as the capture antibody and mAb15 as the detection antibody, the detection limit of the ELISA method was 0.51 ng/mL, and the linear dynamic range was between 1.95 and 500 ng/mL. The recovery ranged from 85.6 to 115.2%, whereas the intra- and inter-assay coefficients of variation were less than 8.6 and 13.9%, respectively. Sample analysis verified that the produced anti-OVA mAb and the developed ELISA may provide a valuable tool for the sensitive determination of OVA in processed foods and for future studies on the mechanism of how OVA functions in anaphylaxis.     

建立一种用重组蛋白检测抗口蹄疫病毒抗体的间接ELISA方法

目的研究以重组蛋白作为包被抗原检测口蹄疫病毒（FMDV）感染后的动物血清中特异性抗体的可能性,为建立一种非病毒颗粒的ELISA检测试剂盒提供实验依据。方法利用自行构建表达的O型口蹄疫病毒VP1表位肽重组蛋白（VP1epi）作为包被抗原,采用间接ELISA方法确定抗原的最佳工作浓度和包被方法,优化各项实验条件,并以FMDV感染后的豚鼠血清作为标准阳性血清确定ELISA方法的特异性和灵敏度。结果FMDV感染后的阳性豚鼠血清可以很好地识别VP1epi重组蛋白,用此蛋白包被检测抗FMDV抗体的灵敏度可达1∶3200,并证明所检测的抗体是FMDV特异性的。结论VP1epi重组蛋白可以替代FMDV颗粒用于建立检测抗FMDV抗体的ELISA试剂盒。     

Development and validation of a sandwich ELISA for quantification of peanut agglutinin (PNA) in foods

In this study, two anti-peanut agglutinin (PNA) polyclonal antibodies were successfully prepared. Using mouse anti-PNA polyclonal antibody as the capture antibody and rabbit anti-PNA polyclonal antibody as the detection antibody, a novel sandwich enzyme-linked immunosorbent assay (ELISA) was developed to quantify PNA. The detection limit of the ELISA method was low (0.49 ng/mL), and the linear dynamic range was between 0.78 and 100 ng/mL. The recovery ranged from 93.86% to 139.3%, whereas the intra- and inter-assay coefficients of variation were less than 10.25% and 12.06%, respectively. Sample analysis verified this method as a reliable tool for the detection of PNA in processed foods.     

双抗体夹心生物素-亲和素ELISA法检测相思子毒素

目的 建立相思子毒素(abrin)的酶联免疫检测方法,为abrin临床诊断、中毒治疗、法医学鉴定等应用领域提供技术基础和参考依据.方法采用双抗体夹心生物素-亲和素ELISA法来检测微量abrin.结果该法检测abrin线性范围为0.125～31.25 μg/L,线性回归方程为y=0.52369X 0.51632(r=0.9816,P＜0.0001,n=9),检测限为0.125 μg/L.不同浓度蓖麻毒素(ricin)、葡萄球菌肠毒素(SEB)对检测结果基本无干扰,表明该法检测abrin具有很好的特异性.该法能用于abrin毒素污染水样、土样、食品、血液等模拟样品的分析,相对标准差为2.35%～4.14%,具有较好的重现性.结论 成功建立了夹心BA-ELISA法检测abrin,巧妙地将多克隆抗体的强富集能力、单克隆抗体的特异性以及生物素-亲和素系统的放大作用结合起来,达到了提高检测的灵敏度和特异性的目的 ,可适用于各种微量abrin样品的分析.     

A novel monoclonal antibodies-based sandwich ELISA for detection of serotype 4 fowl adenovirus

As a major causative agent for hepatitis-hydropericardium syndrome (HPS) in chickens, serotype 4 fowl adenovirus (FAdV-4) has caused huge economic losses in the poultry industry globally. However, there is no commercial diagnostic test for FAdV-4 antigens. To generate a rapid approach for specific detection of FAdV-4, a monoclonal antibodies (mAbs)-based sandwich ELISA was developed. In this ELISA, a purified mAb 4A3 and a HRP-labelled mAb 3C2 specific to the fiber-2 of FAdV-4 were used as the capture antibody and detection antibody respectively. Specificity assay revealed the ELISA only reacted with FAdV-4, not with other avian viruses tested. Sensitivity assay showed the limit of detection of the ELISA was 1000 TCID₅₀/ml and 12.5?ng/ml for the FAdV-4 and the purified GST-Fiber2 protein respectively. Moreover, the ELISA could be efficiently applied in detecting the FAdV-4 in tissue samples from a clinically-diseased chicken flock. All these data demonstrated that the ELISA developed here provides a promising tool for rapid and efficient diagnosis of clinical infection with FAdV-4.