抗S.paratyphi+A+O2抗原单克隆抗体制备及ELISA检测方法的建立

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The polyclonal antibodies were prodeced by immunizing the rabbits with the same antigen.The 2C6 monoclonal antibody,polyconal antibodies and HRP labeld goat anti mouse secondary antibody were chosen to build up a sandwich indrect ELISA method,
detecting pathogen already.But,by far there are rare studies about detecting salmonella parathphi A using ELISA.In our study,monoclonal antibody against 02 antigen of& paratyphi A and polyclonal antibodies were prepared firstly,and then used to establish a sandwich indrect EI。ISA method.
实验室常规检测、诊断甲型副伤寒的主要方法为细菌培养、肥达氏凝集反应和 伤寒血球快速诊断。这些方法费时费力,不利于早期诊断,给流行病学专家在追踪 传染源、早期控制与临床医生早期诊断工作带来了一定的难度。以酶联免疫吸附试 验为原理建立起来的各种免疫学检测方法,特异性好、灵敏度高、操作简便、样品 处理量大,已经广泛应用于临床和食品中病原菌的检测。但是目前国内外还很少有 用ELISA方法检测甲型副伤寒沙门氏菌的报道,本研究中,我们先制备抗甲型副伤 寒沙门氏菌02抗原的单克隆抗体和多克隆抗体,然后以此为基础建立夹心ELISA 方法,快速检测该菌。
通过以上研究工作,初步确定了甲型副伤寒沙门氏菌的2008年硕上学位论文
优化了反应条件。其方法的稳定性和实际应用情况还有待进一步完善,以便为试剂 盒的研制打下基础。
关键词:甲型副伤寒沙门氏菌;快速检测;单克隆抗体;ELISA

华中农业大学2008年硕士学位论文
Abstract
other strains in and out of salmonella species.SO they were specfic to 02 antigen of S
paratyphi A.
2.Establishment of sandwich indriect EUSA method
III
华中农业大学2008年硕上学位论文
1.甲型副伤寒沙门氏菌单克隆抗体的制备与鉴定
甲型副伤寒沙门氏菌的菌体抗原包括01、02和012三种,其中02抗原为该 菌所特有。我们选用甲型副伤寒沙门氏菌模式菌株50001,经沸水浴2h后制备菌体 抗原,免疫5只6.8周龄雌性Balb/C小鼠,经过11次细胞融合筛选出两株分泌特异 性抗体的杂交瘤细胞株,2C6和4F10,其腹水效价分别为1:25600和1:12800, 通过SDS.PAGE分析,两株杂交瘤细胞所产生的单克隆抗体分子量均在180KD左右。 2C6和4F10分泌的单克隆抗体不与伤寒等其它细菌发生交叉反应,为特异性针对甲 型副伤寒沙门氏菌02抗原的抗体。
by them every year,in which 0.6 million die,but most cases are in developing countries. More than 90%of the total incidence of typhoid and paratyphoid were typhoid previously, 硒the widely use of Vi bacterin,in the middle of 90s in 20th century,the popular strain changed,in some provinces the cases of typhoid decreaSed,but that of paratyphoid increaSed largely,with the outbreak trend from spot to part and from inshore provinces to backland provinces.In recent years,paratyphoid becomes the main infectious diease in some areas,and ofen develop to serious epidemic situation.So setting up a rapid and accurate detecting metod is necessary.
成果。尽我所知,除了文中特别加以标注和致谢的地方外,论文中不包含其他人已
经发表或撰写过的研究成果,也不包含为获得华中农业大学或其他教育机构的学位
或证书而使用过的材料,指导教师对此进行了审定。与我一同-1"作的同志对本研究
Typhoid and paratyphoid are acute enteric communicable diseases transmitted by fecal-oral route。of which pathogenies are S.typhi and s.paratyphoid A B C.Typhoid and paratyphoid spread all over the world,approximately 16—17 millions peoples are infected
these methods are time—consuming,labor-consuming,Call’t adapt to early diagosis,it’S hard for epidemiologist to trace the source,earlily control,and for clicinian tO diagnosis. The immunological methods built on enzyme—linked immunosorbent assay are specific, sensitive,simple and Can detect vast samples simultaneously,have been used in clinical
Keywords:S.paratyphi A;rapid.detecting;monoclonal antibody;ELISA
华中农业大学2008年硕士学位论文

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respectively.The molecular weight Was botll around 1 80 KD through SDS—PAGE analysis. The monoclonal antibodies produced by hybridoma cell,2C6 and 4F10,didn’t react with
以前我国伤寒发病占伤寒副伤寒总发病的90以上后来由于伤寒疫苗的广泛使用20世纪90年代中期流行菌株发生转变我国部分省份伤寒病例逐渐下降而由甲型副伤寒沙门氏菌引起的副伤寒病例却大幅上升并呈现由散发到局部暴发由沿海省份向内地省份推进的流行趋势近几年来成为我国一些地区传染病突发事件的主要病种常发展成重大疫情急需建立快速准确的诊断方法
华中农业大学 硕士学位论文 抗S.paratyphi A O2抗原单克隆抗体制备及ELISA检测方法的建
立 姓名:吕均 申请学位级别:硕士 专业:微生物学 指导教师:郭爱玲 20080601
华中农业大学2008年硕士学位论文
摘要
伤寒副伤寒是由伤寒杆菌(Salmonella typhi)和副伤寒杆菌甲、乙、丙(&paratyphi A,B,C)引起的急性肠道传染病,在全球分布很广,估计每年伤寒发病1600万"-'1700 万,死亡60万,主要在发展中国家。以前我国伤寒发病占伤寒副伤寒总发病的90% 以上,后来由于伤寒Ⅵ疫苗的广泛使用,20世纪90年代中期,流行菌株发生转变, 我国部分省份伤寒病例逐渐下降,而由甲型副伤寒沙门氏菌引起的副伤寒病例却大 幅上升,并呈现由散发到局部暴发,由沿海省份向内地省份推进的流行趋势,近几 年来成为我国一些地区传染病突发事件的主要病种,常发展成重大疫情,急需建立 快速、准确的诊断方法。
Through the study above,the detection procedure of sandwich indrect ELISA Was decided,and the reacting conditions were optimized.In future,the stablization and the use of the method also need to be tested,in order to set up the foundation to develop laboratory detection kits for s.paratyphi A。
detecting s.paratyphi A.The result indicated that the ELISA method was specific and
there was no cross reaction with other baterias in and out of the salmonella species.The detecting limit could reach 1 03 CFU/mL.and the whole testing procedure only takes 4—5h. It offered a rapid,sensitive,accuate and efficiem detecting method for the food detecting and clinical early diagnosis.
1.Preparetion and identification of S.paratyphi A monoclonal antibody
S paratyphi A contains three O—angigens:01,02 and 012,in which 02 antigen is unique.The bacterial body antigen Was prepared by bathing in boiling water for 2h,and five female Balb/C mice were immunized.Two strains of hybridoma cell,2C6 and 4F10, which could stably produce specific monoclonal antibody against 02 antigen were selected after 1 1 cell hybridization,of which ascites titer were 1:25600 and 1:1 2800
The main methods of detecting and identifying&paratyhpi A in lab are baterial culture,Widal agglutination reaction and typhiod hematocyte rapid diagnosis.However,
2.夹心EUSA检测方法的建立
用相同抗原免疫兔子,制备多克隆抗体,选用单抗2C6和HRP标记的羊抗鼠酶 标二抗,建立检测甲型副伤寒沙门氏菌双抗夹心ELISA方法。实验结果表明,此 ELISA方法不与属内外常见致病菌发生交叉反应,特异性较好;检测限达到 105CFU/mL,灵敏度高;整个检测过程4.5h即可完成,为食品检验以及临床医生早 期诊断提供一种快速、灵敏、有效的方法。
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