纳米磁性微球对人血浆抗体的特异性分离过程

采用细乳液聚合法制备了嗜硫磁性纳米微球,磁球粒径较小,具有灵敏的磁响应性。经嗜硫性配基(2-巯基噻唑啉)修饰后,在pH=4.0的低浓度柠檬酸缓冲液中可特异性吸附免疫球蛋白G,并实现了在较低盐浓度下被吸附抗体的有效脱附,在吸附过程中表现出明显的单分子层吸附过程。在分离过程中几乎不损伤抗体的生物活性,所分离抗体的生物活性高于99%。磁性微球的平衡吸附量为53.04mg/g,相比于微米级磁性微球的平衡吸附量(3.1mg/g),提高了17倍。     

激光联用环磷酰胺对荷瘤鼠外周血IgG影响的实验研究

以小鼠S180腹水瘤为动物实验模型．对氦氖激光照射与化疗药物环磷酰胺(CYT)联合应用对S180荷瘤鼠外周血IgG含量影响作了系统性研究。应用11．00，14．67和22．00J／cm^2三种剂量氦氖激光照射荷瘤鼠内眼角，同时联合应用化疗药物环磷酰胺,动态监测S180荷瘤鼠外周血IgG含量的变化。结果表明,CYT联合应用氦氖激光照射组IgG含量均高于单纯应用CYT组。     

IgG蛋白镶嵌L-B膜的特性研究

通过蛋白质镶嵌技术，可以有控制地将具有特殊功能的IgG蛋白嵌入框架单分子膜中，并沉积到光学器件表面，以形成生物传感器的表面敏感器。本文通过对表面压的测定，研究了亚相pH值，IgG蛋白的浓度变化对亚相表面磷脂分子与蛋白相互作用的影响；通过石英表面的荧光发射，测量了固相蛋白混合膜中吸附与穿插蛋白质的相对含量及稳定性。     

Cobalt-related asthma: clinical and immunological aspects

Several clinical and experimental findings point to cobalt as the only sensitizer and causal agent of hard metal asthma. The clinical features have been clearly defined by bronchial provocation tests, with a prevalence of late phase responses. Epidemiology is still insufficient to configure prevalence and incidence rates for cobalt asthma. IgE and IgG antibodies with cobalt specificity have been demonstrated, but T-lymphocytes and eosinophyls involvement seem to be important in the mechanism of an allergic inflammation in the airways. Such an immunological pathogenesis links cobalt asthma with other manifestation of hard metal disease.     

血清中抗水痘病毒IgG抗体的检测方法

水痘是由水痘-带状疱疹病毒引起的一种疾病,主要见于儿童,在人群中具有极高的感染率。IgG是机体感染水痘后产生的两种主要中和抗体之一,检测血清中水痘IgG抗体在水痘血清流行病学研究、水痘疫苗的免疫效果评价、临床诊断等方面具有重要意义。本文主要对检测血清中水痘IgG抗体敏感性和特异性较高的膜抗原荧光抗体法、酶联免疫吸附法、间接免疫荧光抗体法、免疫吸附血凝试验法、补体扩大中和试验法和放射免疫法作简要介绍。     

压电传感器电极表面蛋白质的吸附研究

应用自行研制的压电传感器,实时监测免疫球蛋白(IgG)在传感器金电极表面的吸附过程,研究了蛋白质浓度、吸附时间等因素的作用。结合Sauerbrey方程和Langmuir方程,对吸附过程进行表征,推算IgG在金电极表面的吸附速率常数ka=0.057 m3.kg-1.s-2、解析常数kd=0.000 42 s-2。     

Upregulated Expression of Activation-Induced Cytidine Deaminase in Ocular Adnexal Marginal Zone Lymphoma with IgG4-Positive Cells

Immunoglobulin G4-related disease (IgG4-RD) is a systemic disorder characterized by tissue fibrosis and intense lymphoplasmacytic infiltration, causing progressive organ dysfunction. Activation-induced cytidine deaminase (AID), a deaminase normally expressed in activated B-cells in germinal centers, edits ribonucleotides to induce somatic hypermutation and class switching of immunoglobulin. While AID expression is strictly controlled under physiological conditions, chronic inflammation has been noted to induce its upregulation to propel oncogenesis. We examined AID expression in IgG4-related ophthalmic disease (IgG4-ROD; n = 16), marginal zone lymphoma with IgG4-positive cells (IgG4+ MZL; n = 11), and marginal zone lymphoma without IgG4-positive cells (IgG4- MZL; n = 12) of ocular adnexa using immunohistochemical staining. Immunohistochemistry revealed significantly higher AID-intensity index in IgG4-ROD and IgG4+ MZL than IgG4- MZL (p < 0.001 and = 0.001, respectively). The present results suggest that IgG4-RD has several specific causes of AID up-regulation in addition to inflammation, and AID may be a driver of oncogenesis in IgG4-ROD to IgG4+ MZL.