微柱凝胶法在检测孕妇IgG抗体中的应用研究

目的:探讨微柱凝胶法检测对孕妇产前IgG抗体效价的应用价值。方法:对我院120例门诊和住院O型待产孕妇采取微柱凝胶法检测血型抗体IgG。结果:当抗体效价≥64时,才使新生儿发生HDN;当抗体效价达到1024时,发病率达到100%。结论:微柱凝胶法检测灵敏度高,对检验孕妇产前IgG抗体效价具有较高的临床应用价值,可在基层进行推广和应用。     

斑点免疫渗滤法检测丙肝IgG抗体试剂盒的研制

用基因工程重组的丙肝抗原包被于硝酸纤维素膜，建立了检测丙肝ＩｇＧ抗体的斑点免疫渗滤法。与ＥＬＩＳＡ试剂盒进行双盲式同步测定，二法检验结果差异无显著性。渗滤法简便快速，适用于各级医院，有很强的推广价值。     

Lupus vulgaris in a patient with systemic lupus erythematosus and persistent IgG deficiency

We present the case of a patient with juvenile onset systemic lupus erythematosus (SLE) who developed a persistent, acquired hypogammaglobulinaemia with IgG deficiency. The hypogammaglobulinaemia was probably a complication of high dose corticosteroid treatment. The serum IgG level remained subnormal despite intravenous immunoglobulin therapy. Lupus vulgaris, which developed on the nasal cartilage in this patient with SLE, is not an expected finding. This patient is probably the first reported case of SLE associated with lupus vulgaris.     

麻尘对肺泡巨噬细胞影响的体外研究

作者选择黄麻、苎麻、亚麻，采用细胞培养技术，探讨了麻尘对肺泡巨噬细胞（ＡＭ）的影响。结果表明，所用麻尘对ＡＭ均有不同程度的毒作用，导致ＡＭ存活率降低，培养液中乳酸脱氢酶、酸性磷酸酶活性上升，ＡＭ形态出现损伤性变化，但作用强度低于同浓度的石英、石棉。同时，麻尘也导致ＡＭ功能的改变，培养液中免疫球蛋白Ｇ、免疫复合物、组织胺含量增加。比较３种麻尘，其中以苎麻毒性及刺激ＡＭ分泌生物介质的能力最弱。     

男性不育患者精浆抗弓形虫IgG抗体与精子抗体关系的研究

目的:观察男性不育患者精浆中抗弓形虫 IgG 抗体。及其与抗精子抗体(AsAb)的关系。方法:采用 ELISA 方法测定169例男性不育患者及35例正常生育男性精浆抗弓形虫 IgG 抗体和 AsAb。结果:男性不育患者精浆抗弓形虫 IgG 抗体阳性率18.35%,显著高于正常生育组的2.86%(x~2=5.26,P<0.05)OR 为7.64;男性不育组精浆 AsAb 抗体阳性率为26.63%,也显著高于正常生育组(x~2=11.96,P<0.01)。精浆抗弓形虫抗体阳性的男性不育患者精浆AsAb 的阳性率为41.94%,与精浆抗弓形虫抗体阴性组的男性不育病人精浆 AsAb 的阳性率23.19%相比较,差异具有显著性(x~2=4.55,P<0.05).OR 为2.39。结论:男性不育患者精浆抗弓形虫抗体与精浆 AsAb 的产生可能有着一定的关系。     

Serum antibodies to structural proteins of Hantavirus arise at different times after infection.

An enzyme-linked immunosorbent assay (ELISA) was developed for the quantification of serum antibodies against group-specific epitopes of the glycoproteins (G1, G2) and nucleoprotein (NP) of the genus Hantavirus. This assay was used to study the kinetics of the development of serum antibodies after natural infection with Puumala-like virus in humans. To this end a panel of 34 serum samples collected from individuals at different times after natural infection was tested by the ELISA. The samples were also tested for specific IgM and IgG levels against Puumala-like virus, which provided confirmatory data about the presumed timing of infection. It was shown that serum antibodies against the G1 epitope were present in the acute and early convalescent period just before antibodies to the NP epitope could be demonstrated. In contrast, antibodies to two G2 epitopes were present not earlier than in the convalescent and late convalescent period. Since all these categories of antibodies seem to persist for long periods, antibodies against the G1 epitope and the NP epitope may be of specific diagnostic value. Furthermore, levels of G1-specific antibodies and antibodies to either NP or G2 may allow estimation of the time elapsed following initial infection.     

Distinctive immunoglobulin E anti-house dust allergen-binding specificities in a tropical Australian Aboriginal community

BACKGROUND: There is evidence that the specificity of the IgE binding in allergy tests can vary for different populations. OBJECTIVE: We aimed to examine the allergenic specificity of IgE binding in sera from house dust mite (HDM)-atopic subjects in a tropical Australian Aboriginal community. METHODS: Sera shown to contain IgE antibodies to an HDM extract of Dermatophagoides pteronyssinus were examined for IgE binding to a panel of nine purified HDM allergens from this mite species by quantitative microtitre assays. IgG antibody binding (IgG1 and IgG4) was also measured. RESULTS: The IgE-binding activity in the sera from the Aboriginal community was not directed to the expected major groups 1 and 2 HDM allergens but instead to the group 4 amylase allergen. There was also little IgE binding to the potentially cross-reactive tropomyosin (Der p 10) or arginine kinase (Der p 20) allergens. The IgG4 antibody was rarely detected and limited to the Der p 4 allergen. IgG1 antibody binding was frequently measured to all the allergens regardless of an individual's atopic status, whereas in urban communities it is restricted to the major allergens and to atopic subjects. CONCLUSION: The high IgE anti-HDM response of Australian Aboriginals predominantly bound Der p 4 and not the Der p 1 and 2 allergens, showing a distinctive allergy that could affect the disease outcome and diagnosis.     

无偿献血者与SARS康复者血清冠状病毒抗体检测

目的　比较未患过SARS的无偿献血者与SARS康复者血清冠状病毒抗体阳性率的差别。方法　应用酶联免疫吸附法 (ELISA)对 2 2 2 7例未患过SARS的无偿献血者和 3 1例SARS康复者血清进行SARS病毒抗体 (IgG)检测 ,阳性的SARS康复者血清作倍比稀释 ,各稀释血清再用ELISA法检测以测定其IgG抗体效价。结果　 2 2 2 7例无偿献血者有 11例抗体阳性 ,阳性率为 0 49% ,3 1例SARS康复者中有 3 0例阳性 ,阳性率为 96 8% ,两者差异有非常显著性(P <0 0 1)。结论　冠状病毒抗体检测对筛选近期感染冠状病毒的献血者有一定作用     

Induction of antigen-specific isotype switching by in vitro immunization of human naive B lymphocytes

The use of in vitro immunization technology for the generation of human antigen-specific antibodies has essentially resulted in low affinity IgM antibodies, resembling an in vivo primary immune response. We now describe a detailed reproducible protocol for a two-step in vitro immunization, which yields isotype switched, antigen-specific human antibodies. The immunizing antigen was a 30aa synthetic peptide, containing both a B (15aa V3 peptide of the HIV-1) and a T helper cell epitope (15aa peptide from tetanus toxin). The immunization protocol includes: (i) a selection procedure of donors with a memory T cell response against tetatus toxoid; (ii) immunization of mature naive peripheral B lymphocytes in two distinct phases, involving a primary and a secondary step. None of the donors which were examined after primary 7immunization showed at any time an IgG anti-V3 specific antibody response, while all the donors showed an IgM response. After the secondary immunization step, anti-V3 antibodies of both IgM and IgG isotypes were detected. The switch frequency event was high among the tested donors (5/8).     

母婴ABO血型不合母体高效价IgG的低温分离与纯化

目的 分离和纯化母婴血型不合母体的特异性高效价的IgG抗体。方法 采用半饱和硫酸铵低温沉淀法分离IgG抗体，SephedexA50层析柱纯化，然后用B型红细胞(RBC)吸收放散IgG，用聚乙二醇(PEG)沉淀，真空泵脱水回收IgO。结果 200ml血浆经半饱和硫酸铵低温沉淀后得IgG粗制品2．26g，Sephedex A50层析柱纯化后得纯制品1．84g，经B型RBC吸收放散后得特异性IgG 0．55g，回收率达29．89％(0．55／1．84)。结论 采用半饱和硫酸铵低温沉淀法分离高效价IgG抗体，可以获得高纯度的IgG。