~(99m)Tc间接标记单克隆抗体的研究

以NHS MAG3为双功能连接剂 ,采用先标记后偶联的方法 ,研究了用99mTc标记单克隆抗体的各种实验条件 ,得到了最佳标记方法和偶联方法 .标记抗体99mTc NHS MAG3 IgG体外稳定性良好 .进行了99mTc NHS MAG3 CL3在小鼠体内的生物分布测定 .结果表明 ,该配合物在小鼠体内稳定性良好 ,在胃、肠、心中摄取最低 ,在肾 ,肝中摄取最高 .     

基于聚邻苯二胺复合膜电位型免疫传感器的制备

首先利用循环伏安法制备聚邻苯二胺(POPD)修饰碳糊电极(CPE/POPD),然后在CPE/POPD上电沉积普鲁士蓝(PB) 和纳米金(GNPs),制备CPE/POPD/PB-GNPs电极,最后将羊抗小鼠IgG通过金-氨键固定在CPE/POPD/ PB-GNPs上,从而制得一种免疫传感器(CPE/POPD/PB-GNPs/Ab).用循环伏安法和电化学交流阻抗技术对电极的修饰过程进行表征.利用所制备的免疫传感器对溶液中的小鼠IgG进行检测,结果表明,在2.0×10-5 μg/L和1.0×04 μg/L 2种浓度下,免疫传感器均得到了很稳定的电位响应信号,响应时间不超过3 min.所制备的免疫传感器具有灵敏度高、响应速度快、检测范围宽、成本低廉等突出优点.     

抗体药物的植物反应器生产

大量的重组抗体被用于疾病的预防、诊断和治疗.目前,这些重组抗体绝大多数是利用鼠源细胞生产的,它的缺点是有潜在的隐患和价格昂贵.然而,植物作为反应器生产抗体药物既具有安全性又可大规模廉价生产的特点,具有广阔的前景.     

江浙蝮蛇毒中性磷脂酶A2的免疫学研究

用江浙蝮蛇毒中纯化的中性磷脂酶Ａ２（ＮＰＬＡ２）免疫家兔，获得了多克隆抗体，抗体与抗原结合后，抑制了该抗原的神经毒性，而对其催化活力无影响，表明ＮＰＬＡ２有两个活性结构域，即神经毒性与催化活性分别位于两个活性位点上，利用免疫亲和层析纯化了ＮＰＬＡ２的多抗，经ＥＬＩＳＡ检测，与酸性ＰＬＡ２和碱性ＰＬＡ２均有免疫交叉反应，这提示了ＮＰＬＡ２与酸性ＰＬＡ２及碱性ＰＬＡ２的抗原决定簇有同源性。     

Production of passive cutaneous anaphylaxis (PCA) and reversed PCA by rat IgE antibody in the mouse

Summary Although IgE antibody is generally characterized as a homocytotropic antibody, it has been well known for some time that mouse IgE antibody causes potent sensitization of rat skin for PCA. The present study clearly shows, the reciprocal cross-sensitization of mouse skin with rat IgE molecules. PCA and RPCA were produced by rat IgE antibody in an inbred mouse strain, DS/Shi, though not in C3H/HeShi, C57BL/6JShi and BALB/cCrj strains. Sensitization of DS/Shi mouse skin for PCA with rat IgE antibody was comparable in sensitivity with that of rat skin, but lasted only for a short term in comparison with the long persistence in rat skin.     

Immunochemical studies onRhodotorula gracilis D-amino acid oxidase

Summary Polyclonal antibodies were prepared from rabbit sera after immunization with holo- and apo-D-amino acid oxidase purified fromR. gracilis. Both anti-holo- and anti-apoenzyme IgG fractions (as well as affinity-purified IgG) were highly specific: in blot-transfer analyses after SDS-PAGE only a 39 kDa band, corresponding to enzyme monomer, was recognized even in the partially purified yeast extract. No cross-reaction was detected with pig kidney D-amino acid oxidase. As a difference from the mammalian enzyme, yeast D-amino acid oxidase anti-holo- and anti-apoenzyme IgGs had different properties in inactivation and precipitation experiments, indicating the existence of different antigenicity sites related to the FAD-binding domain in the enzyme.     

Loss of virulence of canine distemper virus is associated with a structural change recognized by a monoclonal antibody

The monoclonal antibody (mAB) L1, which binds to the nucleocapsid protein of canine distemper virus (CDV), was shown to bind to avirulent CDV obtained after serial passages in Vero cells, but not to two different virulent demyelinating CDV-strains propagated in dog glial cell cultures. However, when both virulent CDV-strains were passaged through Vero cells they expressed, after a number of passages, an epitope recognized by mAB L1. The occurrence of the L1 epitope appeared to coincide with loss of virulence in animal inoculation experiments.     

Immunochemical probes for food proteins after heat processing

Summary While better hygiene controls and vaccinations have diminished the occurrence of infectious diseases in humans, food-borne diseases have increased. Thus sterilization of food products is of prime importance. The introduction of new technologies applied to food has necessitated new methods for the control of food safety and food quality. This review aims to point out the importance of immunochemistry in the identification of structural changes induced in food proteins during food processing. New technologies have introduced the use of additives in food products, therefore it is important to identify and quantify such additives, even after complete heat denaturation. Toxic chemicals, toxins and pesticides which can contaminate food products before or during processing should also be identified. Finally, the use of immunochemical tests as a control of sterilization procedures in heterogeneous foodstuffs is discussed.     

日本血吸虫单克隆抗体的研究与应用 Ⅰ.产生抗日本血吸虫单克隆抗体杂交瘤细胞系的建立

本文对产生抗日本血吸虫单克隆抗体杂交瘤细胞系的建株实验作初步报导。     

免疫酶染色试验检测广州管圆线虫病鼠血清抗体的实验研究

用广州管圆线虫雌虫冰冻切片作免疫酶染色试验（ＩＥＳＴ），检测感染广州管圆线虫大白鼠血清中抗体，结果在感染后３—９周的３９份大白鼠血清中，３７份呈阳性反应，阳性率为９５％，ＧＭＲＴ２８０．６７；３２份正常大白鼠血清，全部为阴性，检测１０份猪蛔虫抗原免疫大白鼠血清；３份曼氏这宫绦虫裂头拗抗原免疫大白鼠血清；７份日本血吸虫感染大白鼠血清，均呈阴性反应。