角蛋白和过氧化物酶双特异性杂交杂交瘤的建立

作者采用杂交杂交瘤技术制备用于免疫学测定的双特异性抗体。以8-氮鸟嘌呤处理抗过氧化物酶杂交瘤细胞株E-47,获得了HAT敏感的突变株,且保持抗过氧化物酶分泌活性,将其中一个细胞克隆O45克隆化后,与角蛋白免疫的小鼠脾细胞融合,得到了一株稳定分泌抗角蛋白和抗过氧化物酶双特异性抗体的杂交杂交瘤BKH,染色体众数为129条,分泌的抗体含有IgG(1-2a)型杂交抗体。免疫组化显示,BKH抗体可识别角化的皮肤鳞状上皮组织,而不与其它上皮组织反应。     

抗精氨酸支原体单克隆抗体的制备

本室制备了4株(A11、E5、F5、D1)抗精氨酸支原体的单克隆抗体(McAb )。用APAAP桥联酶标技术测定该抗体腹水效价为1:640～1:40 960,A11抗体的Ig类型是IgM,而E5、F5及D1均为IgG1。建立的4株能稳定分泌抗精氨酸支原体的McAb,经液氮冻存后复苏,其分泌抗体能力不受影响。该McAb用于检测细胞培养中的支原体污染,可特异性地检出精氨酸支原体,达到快速、准确的要求。     

抗HIV-1核心抗原p24单克隆抗体的制备及特性的初步鉴定

目的 :建立分泌抗HIV 1p2 4单克隆抗体 (mAb)的杂交瘤细胞株 ,并对其特性进行初步鉴定。方法 :以纯化的基因工程制备的p2 4抗原免疫BALB/c小鼠 ,取免疫小鼠的脾细胞与Sp2 /0骨髓瘤细胞融合 ,经HAT、HT选择培养及有限稀释法进行克隆化后 ,用间接ELISA法及Dotblot对其进行筛选和特性鉴定。结果 :筛选到 2株可分泌抗HIV 1p2 4mAb的杂交瘤细胞 ,其腹水效价为 1×10 -5,亲和力为 1.7× 10 4～ 1.8×10 4mol/L ,mAb的Ig亚类均为IgG1。两株mAb与HBcAg、HCVRNA阳性血清及HIVgp4 1等均无交叉反应 ,只与HIV 1p2 4抗原阳性血清产生特异反应。结论 :成功地建立了 2株可分泌抗HIV 1p2 4mAb的杂交瘤细胞 ,为进一步研制HIV 1p2 4抗原的ELISA检测试剂盒奠定了基础     

抗人肝微粒体蛋白单克隆抗体细胞系的建立及鉴定

目的 初步建立抗人肝微粒体蛋白单克隆抗体规模化制备技术平台,为制备抗人细胞色素P450(CYP450)亚型蛋白的单克隆抗体奠定基础.方法 按常规方法进行细胞融合,以酶联免疫吸附测定法(ELISA)筛选杂交瘤,以ELISA、免疫组化(HI)、免疫印迹(Western Blot)、免疫沉淀(IP)对单克隆抗体加以鉴定.结果 进行6次融合,共筛出216株杂交瘤,其分泌抗体类型为IgG1、IgG2a、IgG2b、及IgM.免疫组化(IH)图片上,人肝细胞浆内均可见阳性颗粒.免疫沉淀(IP)和免疫印迹(Western Blot)结果显示,所制备抗体与人肝微粒体蛋白有特异性结合.结论 筛选制备的单克隆抗体杂交瘤能分泌抗人肝微粒体蛋白单克隆抗体,并且有较强特异性,为下一步研究提供了基础与技术平台.     

抗人Hb单克隆抗体的制备与鉴定

用超声波快速乳化人Ｈｂ，作为抗原免疫ＢＡＬＢ／Ｃ小鼠，取其脾细胞与Ｓｐ２／０骨髓瘤细胞经离心ＰＥＧ法融合，微波ＥＬＩＳＡ筛选阳性克隆，获得三株分泌针对人Ｈｂ不同抗原位点的单克隆抗体杂交瘤细胞系。分别命名为Ｈｂ２６４、Ｈｂ２１０和Ｈｂ２３８。其中Ｈｂ２６４能特异识别人Ｈｂ的β链而不与动物Ｈｂ交叉反应；解离常数Ｋｂ为１．６×１０￣（－８）ｍｏｌ／Ｌ，ＩｇＧ＿（２ａ）。Ｈｂ２１０能结合人Ｈｂ的α链，可被猪Ｈｂ抑制，但亲合力低１００倍；Ｋｄ（人Ｈｂ）为２．８×１０￣（－８）ｍｏｌ／Ｌ；Ｋｄ（猪Ｈｂ）为３．０×１０￣（－４）ｍｏｌ／Ｌ；ＩｇＧ＿（２ｂ）。Ｈｂ２３８是两个脾细胞与一个Ｓｐ２／０细胞融合而成的三体瘤（ｔｒｉｏｍａ）；染色体１３２条；Ｈｂ２３８单克隆抗体可同人Ｈｂ的α和β链结合，Ｋｄ（人Ｈｂ）为８．９×１０￣（－５）ｍｏｌ／Ｌ；ＩｇＧ＿（２ａ）；经分析鉴定，Ｈｂ２３８是针对人Ｈｂα和β链的双特异性抗体。本方法对免疫学隐血检测、法医学鉴定和双特异抗体的研制有一定意义。     

T cell antigens and MHC determinants on rabbit granulocytes

A cell preparation, consisting of 90% granulocytes (polymorphonuclear leukocytes), can be obtained from the rabbit peritoneal cavity. These cells have some membrane antigens, similar to those characteristic of thymus cells (T₁, T₂), but they do not have the thymus antigen, RTLA. Unlike thymus cells, many polymorphonuclear leukocytes have Ia antigen, in their membranes. Heterogeneity of the cell population is indicated by differences in the number of cells affected by complement-mediated cytotoxic cell-kill with monoclonal antibodies, directed against T₁ and T₂ and with polyclonal antibodies directed against Ia.     

Preparation and characterization of anti-sulphamethoxazole (SMX) monoclonal antibody

Anti-sulphamethoxazole (SMX) monoclonal antibody (MAb) has a significant role in monitoring of SMX residue levels in edible animal products. In this study, SMX was diazotizated and coupled to human serum albumin to form an antigen for animal immunization. Anti-SMX hybridomas were prepared by cell fusion using an enzyme-linked immunosorbent assay (ELISA) method to screen for positive hybridomas. A monoclonal antibody (MAb) against SMX was secreted by the hybridomas and its specificity was characterized by ELISA, SDS-PAGE and Western-blot. The results showed that the SMX-MAb was of the IgG1 type and its molecular weight was 162 000 Daltons. The affinity constant of MAb for the conjugated antigen was 2.3×10⁸ l/mol. The detection limit of 50% inhibition rate in the range 10 pg/mL to 10 ng/mL was 0.82 ng/mL and the recoveries of SMX were above 90%. There was no cross-reaction between MAb and SMX analogues.     

数个分泌抗包虫单克隆抗体杂交瘤细胞株的建立

用ＳＰ２／０骨髓瘤与以宁夏南部山区细粒棘球蚴囊液（抗原）免疫的ＢＡＬＢ／ｃ小鼠脾细胞进行两次融合，经筛选，多次克隆后获得６株稳定分泌抗细粒棘球蚴单克隆抗体的杂交瘤细胞，ＥＬＩＳＡ检测，染色体分析，免疫荧光试验以及免疫电镜观察均证实它们具有特异性，与猪肉绦虫囊尾蚴无交叉反应，免疫球蛋白亚类鉴定，除一株属ＩｇＧ３外，余均为ＩｇＧ１，并测定其沉降系数。