细粒棘球绦虫成虫的单克隆抗体制备

为建立抗细粒棘球绦虫成虫的单克隆抗体细胞株，采用经口感染狗肠壁上寄生的成虫制备抗原免疫BALB／c小鼠脾细胞与骨髓瘤sp2／0进行细胞融合。结果显示经筛选克隆后建立了一株分泌抗成虫单克隆抗体的杂交瘤细胞株，命名为2G5E8F4E4。腹水的抗体效价为1：12800。初步建立了分泌抗细粒棘球绦虫成虫的单克隆抗体杂交瘤细胞株。     

分泌抗细粒棘球绦虫单克隆抗体杂交瘤细胞株的建立

为了对包虫病的免疫诊断和免疫预防提供有价值的单克隆抗体,通过对骨髓瘤细胞SP2/0与用细粒棘球蚴囊液免疫的BALB/c小鼠脾细胞融合试验及多次筛选、克隆,建立了分泌单克降抗体的细胞株NIA_2。用ELISA及免疫电镜等方法检测证实该细胞株有特异性。其培养上清分泌抗体滴度为1:2560,注入同系小鼠腹腔,诱生肿瘤和滴度为1:163840的腹水。免疫球蛋白鉴定表明是IgG_1,未见对囊虫的阳性反应。该杂交瘤细胞株经组织培养传代10个月,分泌抗细粒棘球绦虫抗体性能稳定。     

应用特异性抗六钩蚴单克隆抗体免疫荧光试验鉴别细粒棘球绦虫卵

本文报道了用特异性抗细粒棘球绦虫六钩蚴单克隆抗体鉴别细粒棘球绦虫卵和其他几种带绦虫卵的试验结果。试验用的抗细粒棘球绦虫六钩蚴单克隆抗体(EG06.4E5 mab),系以细粒棘球绦虫卵经相继用人工消化液处理和超声提取物免疫BALB/c鼠的脾细胞和骨髓瘤细胞融合的杂交瘤产生的。分别对细粒棘球绦虫卵和其他几种带绦虫卵进行了间接免疫荧光试验(IFAT)。免疫荧光试验经用蔡氏显微镜观察,显示4E5 mab对细粒棘球绦虫六钩蚴有特异     

抗细粒棘球蚴单克隆抗体杂交瘤细胞株的建立

抗细粒棘球蚴单克隆抗体杂交瘤细胞株的建立宁夏医学院基础医学部银川７５０００４宁夏医学科学研究所银川７５０００４胡庆和，王仙琴，刘英姿，吴若芬，赵晨，董进文用ＳＰ２／０骨髓瘤细胞与取自宁夏南部山区患者细粒棘球蚴囊液（抗原）免疫的ＢＡＬＢ／ｃ小鼠脾细胞进...     

用单克隆抗体夹心ELISA法检测棘球蚴病患者血清内CAg

棘球蚴病人体内存在循环抗原(Circulating anti-gen,CAg)和循环免疫复合物(Circulating immunocom-plex,CIC)已被证实,它们和棘球蚴的生活状态有密切关系。检测CAg和CIC对于棘球蚴病的临床早期诊断、疗效考核、判断愈后及流行病学调查均具有重要意义。我们于1990年建立了一株杂交瘤细胞株13F5,持续分泌抗棘球蚴囊液重复抗原表位的单克隆抗体,以此为基础,作者建立了单克隆抗体夹心ELISA,用于棘球蚴病人血清内CAg的检测,初步结     

抗猪囊尾蚴单克隆抗体的初步研究

为了对囊尾蚴病的免疫诊断提供有价值的单在隆抗体（McAb)，我们应用杂交瘤技术，通过对骨髓瘤细胞NS－1与用猪囊尾蚴囊液抗原免疫的BALB／C小鼠脾细胞融合试验及反复筛选和多次克隆化，建立了3株分泌抗猪囊尾蚴抗原的McAb杂交瘤细胞株1D4、4E11和4E12。其分泌的抗体具有很强的种的特异性，与细粒棘球蚴和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3株均属IgG1。经蛋白质转移电泳试验（Western blot)确定，与所获McAb发生特异反应的抗原是猪囊尾蚴头节囊壁（SCW）抗原分子量为25kDa和17kDa的蛋白组分。     

单克隆抗体亲和层析纯化猪肉绦虫囊液抗原及其抗原性分析

作者用小鼠浆细胞瘤与经猪肉绦虫囊尾蚴囊液(CF)免疫的BALB/c小鼠脾脏细胞融合,所得的细胞株分泌的抗体与猪肉绦虫CF抗原、猪肉绦虫盐水浸出抗原、牛肉绦虫成虫抗原、裂头蚴抗原、棘球蚴囊液抗原、卫氏并殖吸虫抗原以及华支皋吸虫抗原进行反应。其中大部分细胞株只与CF抗原起反应,但有些细胞株亦与其余6种蠕虫抗原作用,表明猪肉绦虫的CF中不仅含有带CF特异性抗原决定簇的蛋白质,而且还含有能     

抗细粒棘球蚴单克隆抗体在检测包虫病中的应用

本研究利用ＢＡＳ的生物放大作用［１］，应用生物素－抗生物素抗原斑点试验（ＡＢＣ－ＡＳＴ）［２，３］，将抗细粒棘球蚴单克隆抗体用于检测包虫病患者血清抗原。材料与方法１试剂和药品１．１抗细粒棘球蚴单克隆抗体细胞株诱生腹水由本室采用细胞融合方法，获得稳定分...     

分泌抗鼠疫耶尔森菌F1抗原单克隆抗体杂交瘤株的建立

目的应用杂交瘤技术,制备分泌抗鼠疫F1抗原单克隆抗体的杂交瘤细胞株。方法用鼠疫菌F1抗原免疫雌性BALB/c小鼠,检测小鼠血清中的F1抗体,选抗体滴度最高的小鼠用于细胞融合,融合前3天F1抗原经腹腔注射加强免疫1次,然后取其脾脏细胞与处于对数生长期的SP2/0骨髓瘤细胞混合,50%的PEG作为细胞融合剂,HAT培养液选择培养融合后的细胞,间接ELISA法检测细胞培养上清中的F1抗体,阳性杂交瘤细胞用有限稀释法进行克隆及再克隆。结果获得共计100余株分泌F1单克隆抗体的杂交瘤细胞株,3株进行了4次克隆化,经8个月保存后抗体分泌稳定。结论应用杂交瘤技术,在云南首次成功制备了3株能稳定分泌抗鼠疫杆菌F1抗原的单克隆抗体杂交瘤细胞株,建立了杂交瘤技术的实验程序。     

检测棘球蚴病患者血清内循环抗原的免疫层析试条的制备和评价

目的 以棘球蚴囊液纯化抗原特异性单克隆抗体为基础建立一种快速、简便诊断棘球蚴病的胶体金免疫层析试条方法,并对其进行评价。方法 纯化棘球蚴囊液抗原,并以此免疫BALB/c小鼠,采用杂交瘤技术制备单克隆抗体,对所制备的单克隆抗体确定其亚类和效价。筛选基于棘球蚴囊液纯化抗原制备的单克隆抗体对,采用柠檬酸三钠还原法制备胶体金颗粒,标记筛选到的单克隆抗体,并将其吸附于交联垫;将另一筛选到的单克隆抗体划线包被于同一硝酸纤维素膜适当位置,制成免疫层析试条。用该试条检测手术确诊的细粒棘球蚴病(87例)、多房棘球蚴病(40例)、囊尾蚴病(25例)、日本血吸虫病(10例)、弓形虫病(5例)、并殖吸虫病(5例)、华支睾吸虫病(5例)患者血清,以及60例健康者血清,以评价其检测的敏感性和特异性。结果 以棘球蚴囊液纯化抗原为免疫源制备单克隆抗体,共筛选了11株能高效分泌效价在1∶25 600～1∶102 400特异抗体的细胞株,抗体亚类为IgG₁或IgG_2a。筛选到的单克隆抗体F₃B₆作为标记抗体,单克隆抗体C_4<...     

抗广州管圆线虫成虫单克隆抗体的研制及初步应用

目的制备抗广州管圆线虫成虫单克隆抗体并研究其初步应用。方法用广州管圆线虫成虫可溶性抗原免疫BALB/c小鼠,经融合,筛选分泌高滴度、高特异性单克隆抗体的杂交瘤细胞株。使用所得的单克隆抗体以Western blotting检测广州管圆线虫病患者血清,并建立双抗体夹心ELISA法检测感染大鼠血清。结果获得3株分泌高滴度抗广州管圆线虫成虫可溶性抗原的单克隆抗体杂交瘤细胞株(2A2、3F1、4H2),其分泌的抗体与日本血吸虫、卫氏并殖吸虫、猪囊尾蚴、旋毛虫抗原均不发生交叉反应。3株单克隆抗体均可识别广州管圆线虫成虫可溶性抗原蛋白Mr 15 000,以及患者血清中两种循环抗原Mr24 000和Mr15 000。双抗体夹心ELISA检测阳性率为76.5%。结论制备的抗广州管圆线虫成虫可溶性抗原的杂交瘤细胞株能分泌高滴度、高特异性的单克隆抗体,且在循环抗原的检测方面有应用前景。     

Preparation and application of monoclonal antibodies against hepatitis C virus nonstructural proteins

ＰｒｅｐａｒａｔｉｏｎａｎｄａｐｐｌｉｃａｔｉｏｎｏｆｍｏｎｏｃｌｏｎａｌａｎｔｉｂｏｄｉｅｓａｇａｉｎｓｔｈｅｐａｔｉｔｉｓＣｖｉｒｕｓｎｏｎｓｔｒｕｃｔｕｒａｌｐｒｏｔｅｉｎｓＧＡＯＪｉａｎＥｎ，ＴＡＯＱｉＭｉｎ，ＧＵＯＪｉａｎＰｉｎ...     

肝癌特异性谷氨酰转肽酶单克隆抗体的制备与初步应用

目的 制备抗肝癌特异性谷氨酰转肽酶(GGT)单克隆抗体及研究此单克隆抗体的临床应用。 方法 以纯品GGT-Ⅱ免疫BALB/C小鼠,取免疫鼠脾细胞与SP2/0骨髓瘤细胞融合以制备能产生抗GGT-Ⅱ单克隆抗体的杂交瘤细胞株;以此抗GGT-Ⅱ单克隆抗体采用竞争抑制性ELISA检测人血清GGT-Ⅱ。 结果对融合细胞阳性孔反复克隆后获得1株稳定分泌抗GGT-Ⅱ单克隆抗体的小鼠杂交瘤细胞系:2G4F6B2,此单克降抗体为IgG1类,与GGT-I无交叉反应。以此单克隆抗体测定人血清GGT-II的结果与聚丙酰胺梯度电泳法相符。 结论 研究制备的抗GGT-Ⅱ单克隆抗体特异性高,可应用于临床检测人血清中GGT-Ⅱ。     

抗日本血吸虫重组信号蛋白14-3-3单克隆抗体的制备和鉴定

目的制备抗日本血吸虫重组信号蛋白14-3-3单克隆抗体,并鉴定抗体性质。方法以重组表达纯化的日本血吸虫信号蛋白14-3-3为抗原免疫BALB/c小鼠,采用杂交瘤技术制备单克隆抗体,采用酶联免疫吸附试验及免疫印迹法对获得的单克隆抗体进行类和亚类、效价、浓度、纯度、亲和常数、特异性和检测灵敏度的测定与鉴定。结果共获得6株针对日本血吸虫信号蛋白14-3-3的单克隆抗体,分别为5G9、3F1、3F7、5C6、5D1和1G6,抗体类型分别为IgG1、IgG1、IgG2a、IgG2b、IgG1和IgG1。对其中的单克隆抗体5G9分析显示,制备的腹水抗体效价为1∶1.28×105,亲和层析纯化后的浓度为5.3 mg/ml,纯度95%,亲和常数为5.1×107mol/L。免疫印迹试验结果表明,该单克隆抗体可与体外重组表达纯化的日本血吸虫14-3-3蛋白特异性结合,同时也能与日本血吸虫可溶性虫卵抗原、成虫排泄分泌抗原和成虫抗原特异性反应,而与大肠埃希菌、健康人血清和华支睾吸虫抗原均无明显交叉反应。HRP标记的单克隆抗体5G9检测14-3-3蛋白的灵敏度为31.25 ng/ml。结论本研究获得了6株能稳定分泌抗日本血吸虫14-3-3蛋白的单克隆抗体杂交瘤细胞株,为建立新的日本血吸虫活动性感染检测方法奠定了良好的基础。     

Production of a monoclonal antibody against a yeast secreted antigen of Penicillium marneffei

Monoclonal antibody against P. mameffei yeast secreted antigen was produced in order to develop a serological test for penicilliosis marneffei. The yeast form of P. marneffei was cultured in brain heart infusion broth at 37 degrees C for 7 days. A secreted antigen was prepared, partially purified from culture supernatant and subsequently immunized in a BALB/c mouse. Mouse monoclonal antibody was produced from immune spleen cells by a standard hybridoma technique. Specificity of the obtained monoclonal antibody was assessed with yeast secreted antigens for P. mameffei, C. alblicans, C. neoformans, and H. capsulatum by an indirect ELISA. Three of 46 hybrid clones (1 F1, 2G5, and 3G4) reacted positively with P mameffei secreted antigen. 1 F1 and 3G4 were cloned by two rounds of limiting dilution. Partially purified monoclonal antibody and rabbit polyclonal antibody against P. marneffei yeast secreted antigen were used to develop a double antibody sandwich ELISA to detect P. marneffei antigen in plasma or serum samples of 7 patients with penicilliosis marneffei and 5 healthy controls. The sandwich ELISA developed using monoclonal antibody as a capture antibody and rabbit polyclonal antibody as a detector was able to detect P. marneffei antigen in all the plasma and serum samples of penicilliosis marneffei patients, while negative in all the healthy controls. Thus, the monoclonal antibody produced in the present study appeared to be highly specific for P. marneffei and the double antibody sandwich ELISA developed using monoclonal and polyclonal antibodies against the yeast secreted antigen of P. marneffei showed a strong potential for the diagnosis of penicilliosis marneffei.     

抗华支睾吸虫单克隆抗体的制备和鉴定

目的：建立分泌抗华支睾吸虫成虫的单克隆抗体杂交瘤细胞株并进行鉴定。方法：用华支睾吸虫成虫可溶性抗原免疫ＢＡＬＢ／ｃ小鼠，取其脾细胞与小鼠骨髓瘤细胞ＳＰ２／０融合，筛选分泌高滴度单克隆抗体的杂交瘤细胞株，测定单抗免疫球蛋白亚类和单抗效价，检测单抗与日本血吸虫虫卵抗原、卫氏并殖吸虫成虫抗原和猪囊尾蚴抗原的交叉反应，用ＩＦＡＴ进行单抗识别的抗原定位。结果：获得５株分泌高滴度抗华支睾吸虫成虫单抗的杂交瘤细胞株，其分泌的抗体与日本血吸虫、卫氏并殖吸虫和猪囊尾蚴抗原均不发生交叉反应；５株单抗均属ＩｇＭ；单抗所识别的抗原定位于华支睾吸虫肠管壁。结论：制备的抗华支睾吸虫成虫的杂交瘤细胞株能分泌高滴度和高特异性的单抗。     

华支睾吸虫富甘氨酸2a类抗原Cs4重组蛋白的免疫学特性与定位

目的 对华支睾吸虫富甘氨酸2a(glycine rich antigen 2a,GRA2a)类抗原Cs4重组蛋白(rCs4)进行免疫学特性分析,并对GKA2a类抗原进行组织定位.方法 使用蛋白质印迹(Western印迹)分析rCs4与华支睾吸虫病患者混合血清的免疫反应性,并分析GRA2a类抗原的分泌性.应用ELISA法检测rCs4免疫小鼠血清中抗rCs4特异性IgG水平,并动态检测华支睾吸虫感染兔0～44周的血清中抗rCs4特异性IgG水平.通过免疫荧光实验(immunofluorescence assay,IFA)对华支睾吸虫GRA2a类抗原进行组织定位.结果 纯化的rCsd可被华支睾吸虫病患者混合血清识别.rCs4单抗(mAb Cs4-31)与华支睾吸虫排泄分泌抗原和可溶性抗原在相对分子质量(Mr)26 000与55 000之间分别有13、15个反应条带,均呈阶梯状分布.ELISA检测rCs4免疫小鼠抗rCs4和ESA的IgG效价均达1:64 000,感染兔的抗rCs4特异性抗体平均水平自感染第4周开始上升,于第6周达到高峰,此后逐步递减,至第20周已呈较低水平.IFA检测发现GRA2a类抗原定位于华支睾吸虫成虫的表皮.结论 Cs4蛋白是华支睾吸虫在感染早期的分泌型蛋白,具较好的抗原性.GRA2a类抗原定位于华支睾吸虫成虫表皮.

Abstract：

Objective To study immunological characteristics of Cs4 recombinant protein(rCs4)of Clonorchis sinensis,one of the glycine rich antigen 2a(GRA2a)gene family member,and the histolocalization of GRA2a antigens. Methods The immunological reactivity of Clonorcihs sinensis Cs4 protein to pooled sera from clonorchiasis patients was investigated by using purified rCs4 in Western blotting.The secretory property of GRA2a antigens was also analyzed by Western blotting.The level of specific antibodies against rCs4 in the sera from mice immunized with rCs4,and the dynamic change of antibodies against rCs4 in the sera of C. sinensisinfected New Zealand rabbits(O-44 w post infection)were examined by ELISA.Immunofluorescence assay (IFA)was performed using the anti-rCs4 monoclonal antibody Cs4-31(mAb Cs4-31)to determine the localization of GRA2a antigens in C. sinensis adult worm.Results The purified rCs4 was recognized by pooled sera from clonorchiasis patients.13 and 15 bands appeared at the sites between M,26 000 and 55 000 after mAb Cs4-31 reacting with excretory-secretory antigen(ESA)and soluble adult worm antigen(AWA),respectively.The anti-rCs4 and anti-ESA serum antibody titers in mice immunized with rCs4 were 1:64 000.In C. sinensis infected rabbits,antibody level began to elevate at 4 w after infection,peaked at 6 w,and declined rapidly to a lower level at 20 w.IFA revealed that GRA2a antigens were localized in the tegument of C.sinensis adult worm.Conclusion The Cs4 protein was a secretory antigen appeared in the early stage of infection,and exhibited high antigenieity.GRA2a antigens were localized in tIle tegument of C. sinensis adult worm.     

抗扎伊尔型埃博拉病毒单克隆抗体的制备和鉴定

目的 采用扎伊尔型埃博拉病毒核蛋白(EBOV NP)的合成多肽为免疫原制备鼠源单克隆抗体,并用4种埃博拉流行株核蛋白基因的真核表达蛋白对制备的单克隆抗体进行特异性分析。方法 用人工合成的扎伊尔型埃博拉病毒核蛋白多肽免疫动物,进行细胞融合后筛选阳性杂交瘤细胞。构建埃博拉病毒4种亚型的真核表达载体转染HEK293T细胞以表达目的蛋白,再以真核表达蛋白为抗原,用免疫印迹方法分析扎伊尔型埃博拉病毒单克隆抗体的特异性。结果 完成了抗扎伊尔型单克隆抗体的制备,共得到能分泌抗扎伊尔型埃博拉病毒单克隆抗体的杂交瘤细胞12株,小鼠腹水抗体效价介于1∶10⁴~1∶10⁵,其中3株杂交瘤细胞株分泌的抗扎伊尔型埃博拉病毒单克隆抗体与其他3种亚型无交叉反应,抗体效价高、特异性好。结论 成功制备抗扎伊尔型埃博拉病毒单克隆抗体,为建立快速检测埃博拉病毒的方法奠定基础。     

The identification of a novel NCA-related pancreatic tumour-associated antigen, DD9-antigen: a comparison with the expression of other tumour antigens by the pancreatic tumour cell line GER.

Pancreatic tumour-associated monoclonal antibody DD9E7, raised against the GER pancreatic adenocarcinoma cell line, recognises a protein epitope on a novel family of membrane-bound cell surface glycoproteins (Mr 80-115,000). Western blot analysis of SDS/PAGE gels of tumour biopsies and of normal adult pancreas has shown that these glycoproteins are highly expressed in most pancreatic tumours but cannot be detected in normal adult pancreas. Using monoclonal antibodies directed against other antigens that have been associated with pancreatic adenocarcinoma (Du-Pan-2, Ca 19-9, CEA, NCA-95/55, EMA, and FAP), we have been able to show that although some of the antigens are also expressed by the GER pancreatic tumour cell line, the glycoproteins identified by monoclonal antibody DD9E7 are distinct from those other antigens in both molecular weight and antibody binding characteristics. Neuraminidase, periodic acid, and tunicamycin treatment of cultured cells has shown that monoclonal antibody DD9E7 recognises an epitope on the protein core of the antigen. This epitope is also present in NCA-1, but not in CEA, which suggest that there may be an association between DD9-antigen and other members of the NCA/CEA supergene family.