抗人活化B淋巴细胞单克隆抗体制备及鉴定

自儿童手术摘除的新鲜扁桃体分离人Ｂ淋巴细胞，经ＰＭＡ（佛波醇）激活后得到人活化Ｂ淋巴细胞，用于免疫ＢＡＢＬ／Ｃ小鼠后，取免疫小鼠之脾细胞与小鼠骨髓瘤细胞ＳＰ２／０融合，融合后细胞于含ＨＡＴ－ＩＭＤＭ完全培养基的２％甲基纤维素半固体培养基选择生长，经细胞酶联免疫吸附（ＣＥＬＩＳＡ）筛选间接免疫荧光流式细胞仪鉴定，获培养上清对活化Ｂ细胞及３Ｄ５细胞株细胞反应阳性，而Ｊｕｒｋａｔ细胞株细胞反应阴必的杂交     

分泌抗登革病毒单抗独特型抗体杂交瘤细胞系的建立

将纯化的登革３型病毒（ＤＥＮ－３）单克隆抗体３Ｄ３（ＡｂＩ）连结到载体分子ＫＬＨ上，免疫ＢＡＬＢ／Ｃ小鼠，取其脾细胞与Ｓｐ２／０小鼠骨髓瘤细胞融合。用ＥＬＩＳＡ夹心法检测阳性克隆，融合率达１００％，阳性率为５％，经２－３次克隆化，获得了６株分泌抗登革病毒单抗的独特型抗体（ＭｃＡｂ２）的杂交瘤细胞系。在进行阳性筛选及特异鉴定时，选择了以３－５μｇ／ｍｌ的最适Ａｂ１包被浓度，并用正常小鼠Ｉｇ及ＫＬＨ分     

人醛缩酶A单克隆抗体的制备及应用

纯化并鉴定了人醛缩酶Ａ、Ｂ、Ｃ（ｈＡＬＤ－Ａ、Ｂ、Ｃ）。用ｈＡＬＤ－Ａ免疫Ｂａｌｂ／Ｃ小鼠，将免疫的脾细胞和Ｐ＿３－Ｘ＿（６３）－Ａｇ８．６５３骨髓瘤细胞用ＰＥＧ进行融合，用ＥＬＩＳＡ法筛选，ｈＡＬＤ－Ｂ、Ｃ作阴性对照，将阳性反应的杂交瘤细胞进行克隆，获得３株杂交瘤细胞株。其ＭｃＡｂ的亚类分别为ＩｇＧ２ｂ，ＩｇＧ１、ＩｇＭ，亲合常数分别为７．５×１０￣（１０）、３．５×１０￣９、２．３×１０￣９。３株细胞株分泌的单抗通过Ｉｍｍｕｎｏｂｌｏｔｔｉｎｇ得到证实。用亲合层析法从人肝癌细胞中提纯了ＡＬＤ－Ａ，ＳＤＳ－ＰＡＧＥ显示为单一区带，但其电泳迁移率较ｈＡＬＤ－Ａ滞后。     

分泌抗登革病毒单抗独特型抗体杂交瘤细胞系的建立

将纯化的登革３型病毒（ＤＥＮ－３）单克隆抗体３Ｄ３（ＡｂＩ）连结到载体分子ＫＬＨ上，免疫ＢＡＬＢ／ｃ小鼠，取其脾细胞与Ｓｐ２／０小鼠骨髓瘤细胞融合。用ＥＬＩＳＡ夹心法检测阳性克隆，融合率达１００％，阳性率为５％，经２～３次克隆化，获得了６株分泌抗登革病毒单抗的独特型抗体（ＭｃＡｂ２）的杂交瘤细胞系。在进行阳性筛选及特异性鉴定时，选择了以３～５μｇ／ｍｌ的最适Ａｂ１包被浓度，并用正常小鼠Ｉｇ及ＫＬＨ分别包被反应板作对照，以排除其抗异种免疫球蛋白的干扰。     

抗E.coli RecA单克隆抗体的制备与鉴定

本研究用纯化Ｅ．ｃｏｌｉＲｅｃＡ蛋白免疫ＢＡＬＢ／ｃ小鼠，取免疫脾细胞与小鼠骨髓瘤细胞Ｓｐ２／０融合，以粗制Ｅ．ｃｏｌｉＲｅｃＡ包被酶标反应板，间接ＥＬＩＳＡ方法筛选阳性孔，经有限稀释法４次克隆化，建立了两株分泌抗ＲｅｃＡ蛋白ＭｃＡｂ的细胞系２Ｄ６和３Ｂ１。免疫印迹表明ＭｃＡｂ只以地细菌的ＲｅｃＡ有反应，不与细菌其它成分发生反应。间接ＥＬＩＳＡ进一步表明，ＭｃＡｂ２Ｄ６，３Ｄ１只对细菌ＲｅｃＡ类蛋     

抗E．coli RecA单克隆抗体的制备与鉴定

本研究用纯化Ｅ．ｃｏｌｉＲｅｃＡ蛋白免疫ＢＡＬＢ／ｃ小鼠，取免疫脾细胞与小鼠骨髓瘤细胞Ｓｐ２／０融合，以粗制Ｅ．ｃｏｌｉＲｅｃＡ包被酶标反应板，间接ＥＬＩＳＡ方法筛选阳性孔，经有限稀释法４次克隆化，建立了两株分泌抗ＲｅｃＡ蛋白ＭｃＡｂ的细胞系２Ｄ６和３Ｂ１。免疫印迹表明ＭｃＡｂ只对细菌的ＲｅｃＡ有反应，不与细菌其它成分发生反应。间接ＥＬＩＳＡ进一步表明，ＭｃＡｂ２Ｄ６、３Ｄ１只对细菌ＲｅｃＡ类蛋白有反应，不与小鼠肝、心、肺、脾等和ＢＨＫ细胞的内外蛋白反应。     

抗金黄色葡萄球菌C1型肠毒素McAb的制备及初步应用

金葡菌Ｃ１型肠毒素免疫ＢＡＬＢ／Ｃ小鼠，取其脾细胞与Ｓｐ２／０小鼠骨髓细胞融合选出了能分泌高滴度ＭｃＡｂ的１８个克隆株，对其中１０株进行了鉴定，６档属ＩｇＧ１，４株属ＩｇＧ３。用双抗体夹心法和特异性中和抑制试验比较了ＭｃＡｂ和ＰｃＡｂ的敏感性的特异检出１ｎｇ ＳＥＣ１／０．５ｇ食物／ｍｌ。     

抗D型葡萄球菌肠毒素单克隆抗体的研制及其初步应用

应用小鼠杂交瘤技术获得５株分泌抗Ｄ型葡萄球菌肠毒素（ＳＥＤ）ＭｃＡｂ的杂交瘤细胞（ＤＣ３、ＤＣ４、ＤＢ１１、４Ｄ３和４Ｄ５）。其中４Ｄ３为ＩｇＭ（λ），其余为ＩｇＧ１（ｋ）。这组ＭｃＡｂ除ＤＣ３外，其它４株ＭｃＡｂ识别的抗原构象表位相同，其相对亲和力依次为４Ｄ５＞ＤＣ３＞ＤＣ４＞４Ｄ３＞ＤＢｌｌ。利用抗ＳＥＤ多克隆抗体与ＨＲＰ标记的ＤＣ３和４Ｄ３（针对不同表位）混合ＭｃＡｂ建立了夹心ＥＬＩＳＡ法，并以该法检测了自临床标本中分离的８０林金葡萄菌所产生的ＳＥＤ，其产毒率为４１．３％。     

抗金黄色葡萄球菌C_1型肠毒素McAb的制备及初步应用

金葡菌Ｃ１型肠毒素免疫ＢＡＬＢ／ｃ小鼠，取其脾细胞与Ｓｐ２／０小鼠骨髓瘤细胞融合选出了能分泌高滴度ＭｃＡｂ的１８个克隆株，对其中１０株进行了鉴定，６株属ＩｇＧ１，４株属ＩｇＧ３。用双抗体夹心法和特异性中和抑制试验比较了ＭｃＡｂ和ＰｃＡｂ的敏感性和特异性，并用制备的ＭｃＡｂ诊断试剂对ＳＥＣＩ污染食品进行了检测应用，可特异检出ｌｕｇＳＥＣ１／０．５ｇ食物／ｍｌ。     

抗FMOC—苯丙氨酰氨基己酸的单克隆抗体的制备

为了建立新的非放射性基因标记和检测体系，用化学方法合成了Ｆｍｏｃ－苯丙氨酰氨基己酸。然后将其作为半抗原，与载体蛋白偶联（通过ＥＤＣ），用于免疫ＢＡＬＢ／ｃ小鼠。取脾细胞与Ｓｐ２／０小鼠骨髓瘤细胞融合。经ＥＬＩＳＡ筛选及有限稀释法克隆化，选出一株阳性克隆，分泌专一性抗Ｆｍｏｃ－苯丙氨酰氨基己酸的抗体。用双抗体夹心法测得其亚类为ＩｇＧ１。用间接ＥＬＩＳＡ法测得腹水效价为１．６×１０－５。用竞争性ＥＬＩＳＡ法测得亲和常数为３．６×１０６Ｍ－１。     

人胎盘层粘连蛋白单克隆抗体的制备与鉴定

目的获得能特异性识别人层粘连蛋白（hLN）的单克隆抗体（McAb）。方法用纯化的人层粘连蛋白（hLN）作抗原免疫Balb/C小鼠,以细胞融合、酶联免疫吸附实验（ELISA）筛选和克隆化技术获得抗hLN的杂交瘤细胞株;用生物学方法鉴定杂交瘤细胞,用免疫学方法鉴定McAb的特异性。结果获得4株稳定分泌抗人LN的杂交瘤细胞株（2A1、3B5、2C4、4D1）,培养上清的ELISA效价分别为：1∶512、1∶1024、1∶512、1∶256;腹水效价分别为：1×10^6、1×10^7、1×10^6、1×10^5;采用ELISA相加法表明2A1、4D1与3B5、2C4识别的hLN上的抗原决定簇和识别的不同,4株单抗均属实IgG。结论成功建立了4株稳定分泌抗人LNMcAb的杂交瘤细胞株,它们分别识别hLN上2个不同的抗原位点,有望作为hLN定量检测的特异性抗体。     

肺鳞癌细胞单克隆抗体的建立及鉴定

 目的 制备出高效价的抗人肺鳞癌单克隆抗体。方法 以云南个旧肺鳞癌细胞YTMLC -90免疫的Balb/C小鼠脾细胞和小鼠骨髓瘤NS-1、SP2/0细胞为亲代细胞,应用鼠-鼠杂交瘤技术建立杂交瘤细胞系。ELISA法筛选,有限稀释法克隆化培养,ELISA法测定抗体效价,双抗体夹心法鉴定Ig亚类,制备染色体,Giemsa染色计数染色体数目,ABC免疫组化法行不同组织细胞的交叉检测。结果 获得三株稳定分泌抗YTMLC-90细胞抗体的杂交瘤细胞株S2D1、N2D1及N3C5。培养上清效价分别为1∶512、1∶284及1∶1024,腹水效价分别为1∶105、1∶104及1∶104;Ig亚类分别为IgG1、IgG2a及IgG3;染色体众数在90～110之间;三株抗人肺鳞癌单克隆抗体与其它组织细胞无交叉反应性。杂交瘤细胞体外传代培养6个月仍保持抗体稳定分泌。结论 成功制备高效且特异的抗人肺癌单克隆抗体。     

人巨细胞病毒单克隆抗体的研制检定和应用

采用人巨细胞病毒（ＨＣＭＶ）ＡＤ１６９株作为免疫原，制备出１３株鼠－鼠杂交瘤细胞系。对其中的６株进行了检定．免疫印迹试验结果表明：单克隆抗体（ＭｃＡｂ）７Ｂ４、７Ｄ７、７Ｅ１１、８Ｅ８和８Ｄ６相对应的ＨＣＭＶ多肽分子量分别为４６、１５０、３８、５１７２和６５ｋＤ．ＨＣＭＶ感染人胚肺二倍体细胞（２ＢＳ）后不同时间制成抗原片，与ＭｃＡｂ作间接免疫荧光试验。结果表明：ＭｃＡｂ８Ｂ８相应的病毒多肽为即刻早期抗原，其它５株ＭｃＡｂ相应的病毒多肽均为晚期抗原，６株ＭｃＡｂ等量混合后，标上辣根过氧化物酶，用于ＩｇＭ抗体捕获法ＥＬＩＳＡ（ＭａｃＥＬＩＳＡ）中，并与间接ＥＬＩＳＡ（ＩＥＬＩＳＡ）同时检测ＨＣＭＶ－ＩｇＭ．在未经选择的１００份脐带血中，两法均为阳性的３份，两法均为阴性的９４份；ＭａｃＥＬＩＳＡ阳性而ＩＥＬＩＳＡ阴性的２份血清的特异性试验证明，ＨＣＭＶ－ＩｇＭ确为阳性．ＩＥＬＩＳＡ阳性而ＭａｃＥＬＩＳＡ阴性的１份血清的特异性试验证明，它是由ＲＦ引起的假阳性。     

Establishment of stable human T-T hybridomas

Human T-T hybridomas potentially provide an invaluable resource for a variety of immunoregulatory molecules that modulate the immune response. To date, success in this technology, using human cell populations, has been hampered by several problems associated with proliferative and functional instability of the hybrid cells. These forms of instability are the result of a multifactorial process, with 1 parameter of importance being the chromosome number of the malignant parent cell line used for fusion. The present studies describe the production of a stable human T-T hybridoma generated by fusing a near diploid (modal chromosome number of 48) aminopterin-sensitive T cell line, CEM TG E11, and lectin-stimulated human peripheral blood lymphocytes. The rapidly growing hybrid cells have been clonally selected for the production of a B cell growth factor. Hybridization was documented by the presence of HLA phenotypes reflecting the combined antigens of the fusion partners. Fusions with 4 other partners besides CEM TG E11, where the majority of the cells had modal chromosome numbers ranging from 78 to 94, were proliferatively unstable. To date, hybrid cells derived from the CEM TG E11 fusion have been doubling approximately every 48 h for greater than 12 months, and selected clones constitutively produce B cell growth factor.     

一组抗人肺癌单克隆抗体的制备及初步鉴定

本文报告用人肺腺癌细胞株A549细胞为免疫原,用常规细胞融合技术获得了5株抗人肺癌单克隆抗体WLA-1B4、WLA-2D1、WLA-1G7、WLA-1G9和WLA-2C4。前4株均为IgM型,后1株为IgG1型。添加试验表明WLA-2D1和WLA-1G9识别同一抗原决定簇,WLA-2C4,WLA-1B4识别不同的抗原决定簇。ABC法免疫组织化学研究表明,5株单抗与肺癌组织均呈阳性反应,而与正常组织交叉反应较少。     

广州管圆线虫单抗结合抗原定位分布及在免疫诊断上的应用

目的 研制广州管圆线虫单克隆抗体诊断循环抗原提高诊断的特异性.方法 将广州管圆线虫分泌性抗原免疫小鼠,免疫鼠脾细胞与骨髓瘤细胞融合为杂交瘤细胞,用广州管圆线虫阳性患者血清筛选阳性杂交瘤细胞,培养阳性的杂交瘤细胞分离制备单克隆抗体命名为12D5和21B7,用免疫组织化学的方法分析12D5和21B7单抗结合抗原在广州管圆线虫体内的分布,并用筛选的双12D5和21B7单抗进行抗体夹心ELISA检测实验感染广州管圆线虫的大鼠、广州管圆线虫感染病人血清循环抗原(CAg),用其他寄生虫抗原鉴别单抗的特异性,并与抗体检测比较其敏感性和特异性.结果 经鉴定单抗12D5为IgG1,21 B7为IgM,两株单抗同时识别广州管圆线虫成虫相对分子质量为55 × 103的蛋白,两个单抗针对的抗原分布在虫体肠表面,12D5和21 B7双抗体夹心ELISA法对实验感染的广州管圆线虫的大鼠血清中CAg检出率为100%(48/48),广州管圆线虫感染病人血清CAg检出率为100%(32/32),与日本血吸虫、肝吸虫、肺吸虫、旋毛虫、蛔虫、包虫病人血清无交叉反应,与健康人血清无反应;而用抗原检测32个广州管圆线虫感染病人的抗体检出率为75%(24/32),同时抗体检测与其他寄生虫出现一定的交叉反应.结论 12D5和21 B7单抗结合的抗原为肠相关抗原,双抗体夹心ELISA法对感染广州管圆线虫人和动物血清中CAg检测的特异性强,敏感性高,优于抗体检测试剂,并能够确定现症感染.

Abstract：

Objective To detect infection of Angiostrongylus cantonensis and examine effection of treatment to prepare monoclonal antibodies(McAbs). Methods Six-week-old BALB/c mice were imrnunized by the intraperitoneal injection of e/s antigens of Angiostrongylus cantonensis. Fusion of splecn cells from immunized mice with prepared SP2/0-Ag14 myeloma cells was performed in RPMI 1640. Fused cells were suspended in RPMI 1640 containing 1% HAT and 20% fetal calf serum and dispensed into 96-well cell culture plates. The supernatants of clones were screened by ELISA with sera of patients of angiostrongyliasis.Distribution of cohere antigen of 12D5 and 21B7 monoclonal antibodies was analyzed with immunohistochemistry. Two McAbs ( 12D5 and 21B7) were applied to detect the circulating antigen (CAg) in the sera of rats infected with A. cantonensis and angiostrongyliasis patients respectively by double antibody sandwich ELISA.Results 12D5 McAb was identified as IgG1 and 21 B7 McAb was IgM. Western blot result showed two McAbs could used to identified 55 × 103 protein of adult worms of A. cantonensis. Cohere antigen of 12D5 and 21B7 monoclonal antibodies were distributed on intestine surface of A. cantonensis. The detection rates of CAg in the sera of infected rats 100% (48/48), the detection rates of CAg in the sera of angiostrongyliasis patients was 100% (32/32). No cross-reaction to sera of patients with other infection of parasites, such as clonochiasis, fasiolopsiasis, ancylostomiasis, trichinosis, anisakiasis as well as schsitosomiasis, and health srea did not reacted with 12D5 and 21B7 McAbs,and detaction rate of antibody of angiostrongyliasis patients only reached 75% (24/32) with antigen of A. cantonensis. Conclusion Cohere antigen of 12D5 and 21B7monoclonal antibodies were antigens of enteric epithelium. Sandwich ELISA with 12D5 and 21B7 McAbs showed high specificity act as detecting CAg of A. cantonensis in sera of infection animal and patients. It is apparent that Sandwich ELISA with 12D5 and 21 B7 is not only rapid and simple without requirement of special instrument, but also rather sensitive and specific for the detection of current infection with A. cantonensis.     

Phagocytosis of candida albicans by lymphatic tumour cells in vitro

Experiments were carried out to investigate whether different lymphatic tumour cell lines have similar kinetic characteristics of phagocytosis of microorganisms. Six tumour cell lines were used. These were a human T-cell line (CEM), a mouse T-cell line (YAC-1), a human B-cell line (LAZ), and a human erythroleukemic tumour cells (K562), whereas 2 cell lines of professional phagocytosis were used as controls, a human macrophage cell line (THP1) and a mouse macrophage cell line (P388D1). Tumour cells were mixed with candida albicans at a ratio of 10:1 of candida to tumour cells and the percentage of tumour cells that had attached/phagocytosed candida was determined. After 4 h coculture with candida, tumour cells not of T-cell origin (LAZ and K562) showed moderate level of phagocytosis (28%), whereas tumour cells of T-cell origin (CEM and YAC-1) demonstrated low levels of phagocytosis (15%) as compared to macrophage cell lines (THP1 and P388D1) that showed maximum phagocytosis (64-78%). Acid phosphatase (AcPase) activity was increased by 33% during coculture of YAC-1 cells and yeast cells. In conclusion, the results suggest that lymphatic tumour cells of nonphagocytic origin acquire phagocytic properties during the course of malignancy, and digestion of phagocytosed yeast cells maybe related with AcPase activity, as well as that of other lysosomal enzymes. This phenomenon may represent one mechanism by which tumour cells downregulate immune surveillance.     

Use of monoclonal antibodies reactive with secretory epithelial cells for the immunocytochemical identification of plasma cells

Six monoclonal antibodies (McAbs) were identified as plasma cell-reactive when screened on sections of human tonsil. They were all produced following immunisation of mice with cells of a human plasmacytoid line. Three of the antibodies also stained the cytoplasm (but not the surface) of blood B cells and were unreactive with other leucocytes; one McAb showed broad lymphocyte reactivity and two were completely unreactive with blood leucocytes; on testing with a panel of cell lines specificity for the plasmacytoid line was demonstrated by three of the McAbs. In spite of the marked restriction shown by the reactivity of these antibodies in tests on cells of haemopoietic origin, tests on other human tissues - including thyroid and pancreas - showed that a related antigen was present in the cytoplasm of secretory epithelial cells. The overall patterns of reactivity of the individual McAbs on various tissues and blood lymphocytes were different. Comparisons were made with the established McAb OKT10, which binds to plasma cells, early stem cells and activated lymphocytes; its binding to plasma cells was confirmed and it was shown that it did not stain secretory epithelia. The potent reactions obtained with the new McAbs suggest that antibodies to antigens associated with epithelial cell secretory apparatus provide potentially useful reagents for studying plasma cells.     

两种分泌抗PrP单克隆抗体杂交瘤细胞株的建立及其初步鉴定

目的 制备具有广谱种属反应性的PrP单克隆抗体(McAb)，用于可传播性海绵样脑病(TSE)的诊断及致病机制研究。方法 分别将对应于牛PrP29-48(BoP1)、PrP89-108(BoP2)的两种多肽与匙孔碱血蓝蛋白(KLH)偶联，免疫BALB／c小鼠，经细胞融合后获得分泌针对上述两种多肽的杂交瘤细胞株，用Western-blot方法检测这些细胞株分泌的McAb与牛(Bo)、人(Hu)和仓鼠(Ha)PrP蛋白的反应性。结果 通过细胞融合和2-3轮克隆化，用ELISA筛选出分泌抗BoPl和BoP2抗体的杂交瘤细胞株D11和D8。Western blot显示，获得的McAb均能分别与重组BoPrP(25-242)、重组HuPrP(23-231)和HaPrP(23-231)反应。结论 获得了可与牛、人和仓鼠PrP反应的两种McAb，可用于哺乳类PrP检测及TSE致病机制研究。     

Characterization of herpes simplex virus persistence in a human T lymphoblastoid cell line.

Persistent, dynamic-state infection with herpes simplex virus (HSV) type 1 has been maintained in human T lymphoblastoid (CEM) cells for many months after initial infection with the wild-type virus (HSV0) (input virus/cell multiplicity of 1.0). Persistently infected cells grew as well as uninfected cells, except during occasional periods of crisis (increased viral replication and cytopathic effect). Cells could survive the crisis when they were maintained for twice the usual time interval (8 to 10 rather than 4 to 5 days) before subculture. Interferon was not detectable in the cultures. HSV0 was compared with HSVp1, a small plaque-forming isolate from persistently infected CEM cells. Primary infection of CEM cells with HSV0 at a low input multiplicity (0.01) led to abortive replication, whereas infection with HSVp1 at the same multiplicity resulted in either rapidly lytic or persistent infection depending upon the time interval of subculture. Approximately 55% of plaque-purified clones of HSVp1, as compared with only 5% of HSV0 clones, displayed temperature-sensitive growth in Vero cells. Defective interfering virus was not detectable in uncloned HSVp1 by interference assay. Persistently infected cultures "cured" by treatment with HSV antiserum or incubation at 39 degrees C were resistant to reinfection with HSV but permissive for vesicular stomatitis virus replication, suggesting that these treatments modulated a shift from the dynamic-state of the static-state, latent infection. These studies provide a model for characterization of HSV persistence and latency in a highly differentiated human cell line.