直流电场对鸡胚绒毛尿囊膜血管生成作用的研究

目的：探讨直流电场（electric fields．EF）对血管生成的影响及作用机制。方法：于发育第8天的鸡胚绒毛尿囊膜（chick embryo chorioallantoic membrane，CAM）上植入明胶海绵载体，其中加载不同强度EF，计数长入载体的血管和载体内的微血管密度（microvascular densily．MVD）。结果：150mV／mm、200mV／mm组在CAM上长入载体边缘的血管数和MVD与对照组间的有显著差别（p〈0．01）。结论：强度为150mV／mm、200mV／mm的直流电场能促进CAM的血管生成。     

刺五加对肺纤维化BALF中IL－6抑制作用的研究

在用石棉灌肺制成大鼠支气管肺纤维化模型基础上，应用刺五加注射液进行体内实验治疗。测定了治疗及非治疗组大鼠支气管肺泡灌洗液中单个核细胞自分泌白细胞介素６（ＩＬ－６）水平，经统计学处理两组差异显著（Ｐ＜０．０１）。说明了刺五加对ＩＬ－６的分泌有抑制作用。可能对细胞因子网络紊乱有调节作用，为临床应用刺五加治疗肺纤维化提供了实验依据。     

新生儿体重与优生─附13140例分析

回顾性分析了１２年来１３１４０例新生儿体重及相关因素。新生儿初生体重由１９８２年的３０５０±５７６ｇ上升至１９９３年的３３１７±４２９ｇ。低体重儿发生率由６．４％降至２．９％。大胎儿的发生率由１７．８％升至３１．８％。大胎儿剖宫产率、产后出血、新生儿窒息及第二产程延长的发生率均明显高于正常体重儿。提出预防低体重儿和大胎儿并重的原则。     

重组人表皮细胞生长因子对人皮肤细胞增殖作用的研究

目的：观察重组人表皮生长因子（recombinant human epidermal growth factor，rhEGF）对人表皮细胞增殖的变化。方法：运用包皮环切术后收集培养角质细胞，不同浓度的重组人表皮细胞生长因子处理细胞，MTT法测细胞生长率；流式细胞仪检测细胞周期以及蛋白的表达。结果：5～10ng·ml^-1重组人表皮细胞生长因子可促进人表皮细胞细胞生长。流式细胞仪检测10ng·ml^-1重组人表皮细胞生长因子处理后细胞增殖明显，S和G2／M期细胞数明显增加。结论：重组人表皮细胞生长因子可促进细胞生长以及切口愈合。     

Immunoaffinity chromatography for purification of Salbutamol and Clenbuterol followed screening and confirmation by ELISA and GC-MS

Screening and confirmatory methods for the determination of Salbutamol (SAL) and Clenbuterol (CL) in swine urine were established. The polyclonal antibody against SAL was prepared, which was used to develop the indirect competitive enzyme-linked immunosorbent assay (ELISA) with the limit of detection of 0.5 ng/ml, and to prepare the immunoaffinity chromatography column. The immunoaffinity column could extract and purify SAL and CL simultaneously, with a binding capacity of 400 ng for SAL and 416 ng for CL. After purification, the swine urine samples were screened by ELISA for the presence of SAL and/or CL, and the positive samples were further confirmed and quantified by gas chromatography-mass spectrometry (GC-MS). The results showed that 95% of the positive samples were confirmed by GC-MS with various levels of SAL (1.1-4.6 ng/ml) and/or CL (1.9-229.1 ng/ml) residues in the incurred samples, and all the negative samples were confirmed with no SAL and/or CL residues.     

心电心向量同步仪的研制

本文介绍一种以３８６计算机为核心的心电心向量同步仪。阐述了仪器的工作原理、硬件组成、软件设计。     

111例急性T淋巴细胞白血病免疫表型分析

选用一组抗人白细胞表面分化抗原单克隆抗体和基因探针,依靠间接免疫荧光技术、Ap-AAP桥联酶标免疫组化染色和分子杂交手段.对111例急性T淋巴细胞白血病(T-ALL)进行了免疫分型研究。本研究所观察到的T-ALL细胞表型绝大多数反映着正常胸腺细胞分化发育阶段或某些少见类型细胞的表型特征,亦有少数病例则无正常淋巴细胞相对应的表型,表明T-ALL细胞的高度异质性。对T-ALL表型的研究为今后深入探讨胸腺内淋巴细胞的分化成熟以及T-ALL发生学提供了良好的研究模式。     

Functional expression of 4-1BB (CD137) in the inflammatory tissue in Crohn's disease

4-1BB ligand (L) expressed on antigen presenting cells (APC) interacts with 4-1BB, expressed on activated T cells and this interaction costimulates T cells to secrete cytokines and to proliferate. We investigated whether 4-1BB/4-1BBL interactions might be involved in the pathogenesis of Crohn's disease (CD). In immunohistochemistry, we found 4-1BB expression on lamina propria (LP) cells in inflamed and to a lesser extend in non-inflamed gut tissue from CD patients. mRNA levels for 4-1BB were also elevated in intestinal CD tissue. In contrast, only few 4-1BB-expressing cells were found in inflamed tissue from ulcerative colitis (UC) patients and almost no positive cells were found in control intestinal tissue. 4-1BB expression was better sustained on in vitro activated lamina propria T cells from CD patients compared to controls. Finally, agonistic anti-4-1BB antibody enhanced interferon-gamma (IFN-gamma) production and proliferation of lamina propria T cells from CD patients. Taken together, our data suggest that 4-1BB/4-1BBL interactions contribute to the persistence of gut inflammation in CD.