2 132 例不同人群血清中SARS-CoV抗体水平调查

目的：探讨SARS-CoV(IgG)抗体检测辅助诊断非典型肺炎的临床应用价值。方法：采用ELISA方法及蛋白芯片法对2132例不同人群的血液标本检测SARS-CoV(IgG)抗体，分析SAILS康复者与其它疾病患者和正常人群抗体水平的差异。结果：用ELISA方法测定SARS康复者、肾病、恶性肿瘤、肺部疾病和糖尿病患者、其它疾病的SARS-CoV(IgG)抗体阳性率分别为75．6％(118／156)、29．3％(22／75)、22．3％(19／85)、22．7％(10／44)、13．6％(8／59)，500例健康查体人员全部为阴性，500例密切接触人员也为阴性。蛋白芯片方法测定SARS康复者的抗体阳性率为86％，对62例ELISA方法阳性的非SARS患者测定，仅发现4例阳性。结论：SARS-CoV(IgG)抗体可辅助回顾性诊断是否有SARS-CoV的感染。与ELISA方法相比，蛋白芯片方法具有更高的特异性和灵敏度。     

斑点酶联免疫吸附试验检测伤寒特异性抗体

目的　验证斑点酶联免疫吸附试验 (Dot -ELISA)检测伤寒抗体的敏感性和特异性。方法　采用Dot -ELISA测定伤寒沙门菌包膜抗原V、菌体抗原O和鞭毛抗原Hd 的特异性抗体 ,并与肥达氏反应相比较。结果　肥达氏反应均为阴性 ,而经Dot -ELISA试验 ,疑似伤寒患者血清中检出 3种抗体阳性 1例 ,非伤寒发热病人血清中检出单项Hd 抗体阳性1例。Dot -ELISA法比肥达氏反应敏感 10倍以上 ,且无交叉反应。结论　该法有较高的特异性和敏感性 ,且操作简单、快速、无需特殊设备 ,宜于临床推广应用。     

霉变谷物中霉菌毒素的污染调查

应用酶联免疫吸附测定法和薄层色谱法,对安徽、河南部分地区1991年因特大洪涝灾害造成粮食霉变而引起食物中毒的小麦和大米样品,进行了霉菌毒素[黄曲霉毒素B_1(AFB_1)、脱氧雪腐镰刀菌烯醇(DON)、T-2毒素(T-2)及赭曲霉毒素A(OA)等]的检测。在测定的样品中,检出了高含量的DON和T-2。其中,霉变小麦中,T-2的污染阳性率为96.9%。最高含量为1064.4μg/kg,平均含量为212.1μg/kg;6份霉变大米中,T-2平均含量达532.0μg/kg。     

大鼠全脑照射后早期血清S-100B变化特征

目的 观察大鼠全脑不同剂量照射后1月内不同时间点血清中S-100B的变化,以探讨S-100OB在早期放射性脑损伤中的变化特征.方法 对大鼠予4 MeV电子线分别单次全脑照射2、10和30 Gv制备大鼠早期放射性脑损伤模型.采用酶联免疫吸附试验(ELISA)检测照射后1 h、6 h、12 h、24 h、3 d、1周、1个月血清中S-100B的浓度.结果 大鼠血清S-100B浓度在照射后6 h升高最明显,照射后12 h浓度下降,照后24 h再升高(除外2 Gy组为在照射后3 dR升高),随后下降直到最后观察时间点.结论 大鼠全脑照射后血清S-100B水平发生了变化,不同剂量组血清S-100B浓度有显著性差异,剂最越高,浓度越高.结果 提示S-100B可能会成为检测早期放射性脑损伤的重要血清指标.     

RENIN SECRETION FROM MALIGNANT PULMONARY METASTATIC TUMOUR CELLS OF VASCULAR ORIGIN

1. A pulmonary chemodectoma/glomangiosarcoma that had metastasized from the thigh was studied after removal from a 22 year old Algerian patient with hypertension, high plasma prorenin and signs of secondary aldosteronism. 2. Renin and renin mRNA were localized in sections of the tumour tissue using monoclonal anti-human renin antibody and human renin cDNA probe, respectively. 3. The cells grew prolifically in culture, but, even though their renin content was similar to that of transfected human juxtaglomerular cell tumour cells (approximately 1 pg/microgram DNA), their rate of secretion of renin was much lower (0.05-0.15 cf. 0.5-1.5 pg/h per microgram DNA). 4. Forskolin (10 mumol/l for 24 h) increased secretion of renin from 1.9 +/- 0.36 to 4.1 +/- 0.64 pg/ml per h of culture (P less than 0.001, n = 11), consistent with cAMP being a second messenger in the secretory mechanism. 5. The cells should provide valuable information about intracellular mechanisms for the regulation of renin synthesis and secretion.     

Evaluation of human antibody responses to diphtheria toxin subunits A and B in various age groups

This study aimed to evaluate human antibody responses to diphtheria toxin subunits in various age groups. Antibodies against the intact diphtheria toxin and the diphtheria toxin subunits A and B were evaluated in 1319 individuals using a double-antigen ELISA. Although high levels of protection (83.6%, 95% CI 79.2-87.4) were found in children and adolescents, the middle-aged adult population was less protected (28.8%, 95% CI 24.3-33.6). An increase in age was associated with a decrease in the frequency of protected individuals in the 0-39-year age group (p <0.001). Anti-subunit B levels correlated well (p <0.01) with levels of antibodies against the intact toxin. In children aged < or =16 years, the intervals at which the peaks in geometric mean titres of anti-subunit B antibodies were observed were found to correlate with the ages at which booster doses are administered. Overall, males appeared to be more protected than females (OR 1.67, 95% CI 1.34-2.08, p <0.001). A small group of individuals had antibody levels of > or =0.1 IU/mL against the intact toxin, but did not have protective antibody against subunit B. Determination of anti-subunit B antibody levels should help in evaluating the effectiveness of diphtheria boosters and other aspects of diphtheria immunity.     

ELISA双抗原夹心法在梅毒检测中的重要分析

目的通过三种实验方法对梅毒进行检测.方法应用TEUST、SLISA和TPPA实验检测80例患者血液.结果80例ELISA法阳性TRUST法阴性标本中TPPA阳性为72例(90%),阴性为8例(10%).结论实验结果说明ELISA法对梅毒检测的检出率较高.     

子宫内膜异位症患者血清中靶抗体的检测和应用

目的 :建立一种ELISA方法 ,以检测子宫内膜异位症患者血清中抗转铁蛋白抗体。　方法 :用转铁蛋白包被的间接ELISA方法检测血清中的抗转铁蛋白抗体。血清标本来自 96例正常体检女性 ,6 4例妊娠妇女 ,72例儿科女童 ,以及 2 4例子宫内膜异位症患者。　结果 :子宫内膜异位症患者血清中的抗转铁蛋白抗体阳性率远远高于对照组 ,特异性为 99.0 % ,敏感度为 95 .8% ,准确性为 99.2 %。　结论 :子宫内膜异位症患者血清抗转铁蛋白抗体阳性率明显高于对照组 ,抗转铁蛋白抗体检测可作为子宫内膜异位症的非创伤性诊断方法     

猿猴疱疹病毒B糖蛋白D的表达及抗原性的探讨

目的表达猴B病毒糖蛋白D(BVgD)并对其抗原性进行初步研究。方法应用体外原核表达BVgD,继而进行Ni离子亲和层析纯化。采用Western blotting对蛋白抗原性进行分析,评估其抗原潜力。结果完成了对BVgD的小量表达和纯化。Western blotting结果表明表达出的重组蛋白BVgD具有特异性结合猴B病毒抗体的能力。结论BVgD重组蛋白具有良好的抗原性,与HSV-1抗体无交叉反应。具有进一步开发的潜力,也为BVgD免疫原性等方面的进一步研究提供了条件。