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Tossapon WONGTANGPRASERT Wirongrong NATAKUATHUNG Umaporn PIMPITAK Anumart BUAKEAW Tanapat PALAGA Kittinan KOMOLPIS Nanthika KHONGCHAREONPORN 《Journal of Zhejiang University. Science. B》2014,(2)
研究目的:抗土霉素单克隆抗体的制备和特性分析,并用于间接竞争酶联免疫吸附测定法(icELISA)分析虾样品中土霉素的残留。创新要点:本研究建立分泌抗土霉素单克隆抗体的杂交瘤细胞株,筛选出对虾中土霉素残留检测具有较高灵敏度的单克隆抗体2-4F。研究方法:用细胞杂交技术使土霉素-牛血清白蛋白偶联物免疫的BALC/c雌性小鼠的脾细胞与骨髓瘤细胞融合,建立三株分泌抗土霉素单克隆抗体的杂交瘤细胞株(2-4F、7-3G和11-11A),并制备它们的单克隆抗体。通过icELISA法分析单克隆抗体对土霉素的半抑制质量浓度(IC50)和交叉反应率,明确其灵敏度和特异性。重要结论:实验结果发现单克隆抗体2-4F具有最高的灵敏度,对土霉素的IC50为7.01 ng/ml,且该单抗特异性强,仅与罗利环素之间有强烈的交叉反应,而与非相关抗生素不发生交叉反应。当利用单克隆抗体2-4F检测虾样品中的土霉素含量时,其批内和批间回收率分别为82%~118%和96%~113%,变异系数分别为3.9%~13.9%和5.5%~14.9%。因此,单克隆抗体2-4F可用于虾产品中土霉素残留分析试剂盒的开发。 相似文献
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将纯化IBDV组织毒免疫的BALB/C鼠脾细胞与SP2/0骨髓瘤细胞融合,用ELISA、病毒中和试验检测分泌抗体,获得了六株稳定分泌抗IBDV单克隆抗体的杂交瘤细胞,命名为NIB—1,NIB—2,NIB—3,NIB—4,NIB—5,NIB—6;六株单抗均具ELISA特性和免疫沉淀特性,亚类鉴定表明,前四株属于IgG_(2a),后二株属于IgG_1。杂交瘤细胞冻存六个月后复苏,均能稳定分泌特异性单克隆抗体。 相似文献
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目的:建立基于单克隆抗体的检测马铃薯植物中马铃薯S病毒(PVS)的血清学方法,为我国PVS的田间调查和检测及无毒种薯的生产提供快速、实用的检测技术。创新点:首次制备了抗PVS的高度特异和灵敏的单克隆抗体,并以制备单抗为核心建立三种能快速、准确、灵敏、特异地检测PVS的血清学检测方法。方法:以差速离心方法提纯的PVS病毒粒子作为免疫原免疫BALB/c小鼠,通过杂交瘤技术获得了能稳定传代并分泌PVS单克隆抗体的杂交瘤细胞株;扩繁的杂交瘤细胞注射到小鼠腹腔获得单抗腹水,并以纯化的制备单抗为核心,根据血清学原理建立检测马铃薯植物中PVS的双抗夹心酶联免疫吸附试验(DAS-ELISA)、斑点酶联免疫吸附试验(dot-ELISA)和组织印迹酶联免疫吸附试验(tissue print-ELISA)血清学检测方法;并对田间马铃薯样品进行PVS检测,分析建立的血清学方法检测PVS的有效性。结论:利用杂交瘤技术获得了五株能稳定传代并分泌PVS单克隆抗体的杂交瘤细胞株,以制备杂交瘤细胞分泌的单抗为核心建立了检测马铃薯植株中PVS的DAS-ELISA、dot-ELISA和tissue print-ELISA三种血清学方法。三种血清学方法检测感染PVS的马铃薯植株呈阳性反应,而检测健康的马铃薯及感染其他三种马铃薯病毒的植株呈阴性反应,且建立的DAS-ELISA和dot-ELISA方法检测马铃薯病叶的灵敏度分别达到1:163 840和1:10 240倍稀释(w/v,g/ml)。田间样品检测结果发现,建立的血清学方法的检测结果与逆转录聚合酶链反应(RT-PCR)的检测结果一致,表明建立的血清学方法可有效地用于马铃薯植物中PVS的检测,从而为我国PVS的田间调查和检测及无毒种薯的生产提供快速、实用的检测技术。 相似文献
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目的:评价一种新型水溶性免疫佐剂在制备小分子化合物单克隆抗体(单抗)中的应用效果。创新点:采用一种新型水溶性免疫佐剂,快速制备了分别针对4种农药和1种海洋毒素的高亲合力单抗,且其性能与以往采用弗氏佐剂获得的相应单抗非常接近。方法:本研究以4种农药和1种海洋毒素为目标分析物,采用一种新型水溶性佐剂与小分子抗原相互混合,直接对Balb/c小鼠进行小腿肌肉注射免疫。经过2~3次免疫后进行腹腔注射常规末次免疫,细胞融合后筛选出了相应的杂交瘤细胞株,制备并鉴定了针对上述半抗原小分子的特异性单抗。结论:采用该水溶性免疫佐剂制备抗原注射溶液无需乳化过程,免疫操作简便,且对小鼠负面效应较小;虽然该处理小鼠产生的抗血清效价并没有像常规弗氏免疫佐剂带来的效价值高,但细胞融合后筛选得到有效细胞株的概率尚可;获得的针对目标分析物的单抗在灵敏度和特异性等方面都接近于以往采用弗氏佐剂获得的单抗。试验结果表明,该水溶性免疫佐剂适用于针对小分子化合物单抗的高效制备。 相似文献
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为了对囊尾蚴病的免疫诊断提供有价值的单克隆抗体(McAb),我们应用杂交瘤技术通过对骨髓瘤细胞SP2/0与用猪囊尾蚴尿素溶性抗原免疫的BALB/C小鼠脾细胞融合试验及反复筛选和多次克隆化,获得了两株分泌抗猪囊尾蚴抗原的McAb杂交瘤细胞株2D_6、4F_(12)。其分泌的抗体具有很强的种的特异性,与包虫囊液抗原及肥颈绦虫囊尾蚴抗原均不发生交叉反应。免疫球蛋白亚类鉴定表明所获2株均属IgG。 相似文献
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目的:建立基于单克隆抗体的检测番茄等植物中凤果花叶病毒(Pep MV)的血清学方法,为Pep MV的田间调查和诊断及其科学防控提供快速实用的检测技术。创新点:首次制备了抗Pep MV的高度特异和灵敏的单克隆抗体,并利用制备的单抗建立了3种能特异且灵敏地检测Pep MV的血清学方法。方法:以差速离心方法提纯的Pep MV粒子作为免疫原免疫BALB/c小鼠,通过杂交瘤技术获得了能稳定传代并分泌Pep MV单克隆抗体的杂交瘤细胞株;杂交瘤细胞注射到小鼠腹腔获得单克隆抗体腹水,并以制备单抗为核心,根据血清学原理建立检测植物中Pep MV的双抗夹心酶联免疫吸附试验(DAS-ELISA)、斑点酶联免疫吸附试验(Dot-ELISA)和组织印迹酶联免疫吸附试验(Tissue print-ELISA)三种血清学检测方法;利用田间番茄样品分析建立的血清学方法检测Pep MV的有效性。结论:利用杂交瘤技术获得了6株能分泌高度特异灵敏Pep MV单克隆抗体的杂交瘤细胞株,以分泌的单抗为核心建立了检测植株中Pep MV的DASELISA、Dot-ELISA和Tissue print-ELISA三种高度灵敏的血清学新技术。三种建立的血清学技术检测感染Pep MV的番茄植株均呈强阳性反应,而检测健康番茄及感染其他5种植物病毒的植株呈阴性反应,且DAS-ELISA和Dot-ELISA血清学技术检测番茄病叶粗提液的灵敏度分别达到1:1 310 720和1:20 480倍稀释(质量体积比,g/m L)。田间样品检测结果发现,建立的血清学技术的检测结果与反转录聚合酶链反应(RT-PCR)的检测结果一致,表明建立的血清学方法可有效地用于植物中Pep MV的检测。同时,本研究首次发现Pep MV已在我国云南番茄作物上发生流行。Pep MV单克隆抗体的制备及其灵敏血清学检测方法的建立有益于Pep MV的田间调查和诊断及其科学防控。 相似文献
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1975年,克勒和尔斯坦发现,将小鼠骨髓瘤细胞和绵羊红细胞免疫的小鼠脾细胞进行融合,形成的杂交细胞既可产生抗体,又可无限增值,从而创立了单克隆抗体杂交瘤技术。他们因此获得1984年的诺贝尔医学或生理学奖。制备单克隆抗体的过程要包括动物免疫、细胞融合、选择杂交瘤、检测抗 相似文献
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双特异性磷酸酶（Dual Specificity Phosphatase）是酪氨酸磷酸酶家族中的一员,这个家族中的成员既能对磷酸化酪氨酸去磷酸化,也能对磷酸化丝／苏氨酸去磷酸化．此外,它们还在有丝分裂原激活蛋白磷酸酶信号途径（MAPK）中起重要生理功能．为了制备抗人双特异性磷酸酶的单克隆抗体（mAb）,以DUSP18重组蛋白为抗原免疫BALB／e小鼠,通过B淋巴细胞杂交瘤技术制备抗相应磷酸酶的mAb．用Western blot检测mAb对重组蛋白和细胞中天然磷酸酶的反应性,共获得6株可稳定分泌抗磷酸酶mAb的杂交瘤细胞株,为进一步研究双特异性磷酸酶的去磷酸化作用机理以及其在有丝分裂原激活蛋白磷酸酶信号途径（MAPK）中的信号转导提供强有力的工具． 相似文献
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杀鲑气单胞菌单克隆抗体的制备及其特性分析 总被引：1，自引：0，他引：1
应用杂交瘤单克隆抗体技术制备了6株分泌抗杀鲑气单胞菌杀鲑亚种的单抗细胞株,并对其特性进行分析。结果显示:6株单抗中IgM有3株,IgG1有2株,IgG2a有1株,且抗体效价为1:12800—1:51200,检测灵敏度为1.0×105—1.0×108cfu·mL-1。进一步实验证实这些单抗与其他病原菌都无交叉反应。但单抗5C7、7H6与杀日本鲑亚种有交叉反应;单抗8A2与无色亚种存在阳性反应。表明杀鲑气单胞菌亚种之间既有独特的抗原决定簇,又有共同抗原位点。制备的单抗可用于杀鲑气单胞菌的快速诊断和亚种鉴定,为该菌的进一步研究提供必要手段。 相似文献
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Jun Zhang Xin-you Xie Su-wen Yang Jin Wang Chao He 《Journal of Zhejiang University. Science. B》2010,11(2):136-143
Objective: To understand the function of nicotinamide N-methyltransferase (NNMT) protein as tumor biomarker in renal carcinoma. Methods: Recombinant NNMT protein was used to prepare monoclonal antibodies by hybridoma technique. The diagnostic and prognostic function of NNMT protein in renal carcinoma was evaluated by analyzing 74 renal cancer tissues through immunohistochemical staining for NNMT by using the prepared antibodies. Results: Two hybridomas named 2F8 and 1E7 stably secreting the monoclonal antib... 相似文献
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Objective: To understand the function of nicotinamide N-methyltransferase (NNMT) protein as tumor biomarker in renal carcinoma. Methods: Recombinant NNMT protein was used to prepare monoclonal antibodies by hybridoma technique. The diagnostic and prognostic function of NNMT protein in renal carcinoma was evaluated by analyzing 74 renal cancer tissues through immunohistochemical staining for NNMT by using the prepared antibodies. Results: Two hybridomas named 2F8 and 1E7 stably secreting the monoclonal antibodies were isolated successfully, and characters such as isotypes and specificity were determined. NNMT protein was significantly up-regulated in renal cancer and significantly associated with tumor histology and ages. The univariate survival analysis demonstrated that the pT-status, high levels of NNMT, and distant metastasis were significant prognosticators. Conclusion: NNMT is over-expressed in a large proportion in renal cell cancers. High NNMT expression is significantly associated with unfavorable prognosis. However, the prognostic value of NNMT needs further verification in larger sample sizes. 相似文献
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Monoclonal antibody-based ELISA and colloidal gold-based immunochromatographic assay for streptomycin residue detection in milk and swine urine 总被引：2，自引：0，他引：2
Jian-Xiang Wu Shao-en Zhang Xue-ping Zhou 《Journal of Zhejiang University. Science. B》2010,11(1):52-60
A protein conjugate of streptomycin (streptomycin-bovine serum albumin (BSA) conjugate) was prepared and used as immunogen to produce monoclonal antibodies (MAb). One hybridoma secreting anti-streptomycin MAb was obtained and then used to produce MAb. The MAb named 13H5 showed the 50% maximal inhibitory concentration (IC50) value of 4.65 ng/ml and the IC20 value of 0.21 ng/ml in phosphate buffered saline (PBS). At optimum conditions, an indirect competitive enzyme-linked immunosorbent assay (ELISA) and a co... 相似文献
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Ge Song Jia-yu Wu Yan Xie Yong Liu Ya-juan Qian Xue-ping Zhou Jian-xiang Wu 《Journal of Zhejiang University. Science. B》2017,18(12):1075-1082
Potato virus S (PVS) often causes significant losses in potato production in potato-growing countries. In this study, the ordinary strain of PVS (PVSO) was purified from PVS-infected potato plants and used as the immunogen to produce hybridomas secreting monoclonal antibodies (MAbs). Five highly specific and sensitive murine MAbs (1A3, 16C10, 18A9, 20B12, and 22H4) against PVS were prepared using conventional hybridoma technology. Using these MAbs, tissue print-enzyme-linked immunosorbent assay (ELISA), dot-ELISA, and double-antibody sandwich (DAS)- ELISA were developed for sensitive and specific detection of PVS infection in potato plants. The results of sensitivity assays revealed that PVS could be reliably detected in PVS-infected leaf crude extracts diluted at 1:10 240 and 1:163 840 (w/v, g/ml) in phosphate buffer saline (PBS) by dot-ELISA and DAS-ELISA, respectively. Twenty-two samples collected from potato fields in Yunnan Province, China were tested for PVS infection using the serological assays we had developed, and 14 of them were found to be positive. This indicates that PVS is now prevalent in potato fields in Yunnan Province. 相似文献
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Objective: To investigate the in-vitro antitumor immune responses of dendritoma formed by mouse hepatocellular carcinoma (HCC) cells and lymphotactin (Lptn) gene modified dendritic cells (DCs). Method: DCs prepared from mouse bone marrow were genetically modified by lymphotactin adenovirus, and fused with H22 cells by polyethylene glycol (PEG). RT-PCR and ELISA were employed to identify lymphotactin expression at mRNA and protein level. Cell phenotypes and fusion efficiency was detected by FACS. The stimulatory effect of DC on T cells was detected by mixed lymphocyte reaction. The cytotoxicity activity against H22 cells was assayed by LDH method. Results: Lymphotactin could be efficiently expressed by DCLptn/H22 hybridoma. DCLptn/H22 cells could induce potent T cell proliferation effect and generate strong cytotoxic T lymphocyte (CTL) reaction against allogenic H22 cells. Conclusion: Lymphotactin genetic modification could enhance the in vitro immune activity of the dendritoma. 相似文献
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INTRODUCTION Because of its low molecular weight and ability to fluoresce independently (George, 1997), the new molecular tag, green fluorescent protein (GFP), has become more and more popular after Prasher et al.(1992) cloned its cDNA in 1992. There are many reports describing the co-expression of GFP and a specific antibody or cytokine gene, with the fusion protein expressing the fluorescent activity and bio-logical activity of the complement protein (Haraguchi et al., 1999; Mclean… 相似文献