退变性腰椎滑脱CT下小关节面角的测量与意义

目的 经ＣＴ观测退变性腰椎滑脱病人及正常人的腰椎小关节面角,推测矢状方向小关节与退变性腰椎滑脱之间的关系。方法 包括２４例Ｌ４～５节段的退变性滑脱病人和３７例正常人作为研究对象,均为女性。应用ＣＴ对Ｌ３～Ｓ１腰椎小关节进行扫描和小关节面角测量。结果 除观察到明显的退行性变化外,滑脱病人的Ｌ４～５节段小并节面角明显小正常人群。结论 过度朝向矢状面的退变小关节是导致腰椎退变性滑脱的重要原因之一。     

Study on sensitivity of neuroglioma to chemotherapeutic drugs]

In this study, the chemosensitivity of 36 cases' fresh neuroglioma specimens was examined in vitro with MTT assay. The separation method for single tumor cell, the number of planting of cells, and the dosage and acting time of drugs, which have effects on the results of MTT assay, were studied systematically. On the basis of this experiment, we established a screening method for the chemosensitivity of neuroglioma; it is accurate, rapid, and simple. At the same time, the results showed that neuroglioma was more sensitive to the chemotherapeutic drugs Vm26, DDP and MMC, and the sensitivity varied with not only the drugs but also the individuals.     

The Regulatory Action of the Modified Yu Ping Feng Tang on Cellular Immunity in Mice under Amputation-Induced Stress

To approach the action of modified Yu Ping Feng Tang(玉屏风汤 Jade-Screen Decoction)on cellularimmunity,an experiment was conducted in mice under amputation-induced stress.On the 3rd dayafter amputation,acute atrophy was found in the thymus,the reactivities of T-and B-lymphocytes toCon-A and LPS were decreased,the IL-2 content and its activity reduced and the activity of NK cellslowered.The high,moderate and low concentrations of the modified Yu Ping Feng(YPF)Decoction allhave antagonistic action on the above manifestations of immune inhibition.     

绒毛膜促性腺激素对人胃腺癌细胞胞浆cAMP水平的影响

为探讨绒毛膜促性腺激素（ｈＣＧ）作用于胃腺癌细胞后的信号传递机制,我们对ｈＣＧ对胃腺癌ＳＧＣ－７９０１细胞胞浆内ｃＡＭＰ含量的影响进行了观察。结果显示：当ｈＣＧ的浓度由１０＾－１１ｍｏｌ／Ｌ增加到１０＾－６ｍｏｌ／Ｌ时,胞内ｃＡＭＰ的水平从２．１ｐｍｏｌ／ｍｇ蛋白增至约１０ｐｍｏｌ／ｍｇ蛋白（Ｐ〈０．０１）,与对照组相比有显著性差别（Ｐ〈０．０１）。同时,此效应还具有时间依赖性,即随着ｈＣＧ作用时     

Changes of type I collagen in the lungs of rats with hypoxic pulmonary hypertension]

The changes of type I collagen in the lung tissues of rats with hypoxic pulmonary hypertension (HPH) and its relationship to the mean pulmonary arterial pressure (mPAP) were investigated. The blood dynamic indexes of pulmonary circulation were measured by using Swan-Ganz. The distribution of type I collagen in pulmonary arteries, bronchi and plumonary interstitial was observed by using streptavidin peroxidase method (SP). The morphologic changes of small pulmonary arteries and the level of type I collagen were determined by image pattern analysis technique and gray scale scanning, respectively. The results showed, compared with the controls, mPAP of the hypoxic rats elevated (from 2.12 +/- 0.25 to 3.95 +/- 0.43 kPa, P < 0.01), their small pulmonary arteries, walls thickened (MT% from 16.35 +/- 2.64 to 35.83 +/- 3.55, MA% from 26.83 +/- 3.40 to 59.68 +/- 4.90, P < 0.01) and lumen narrowed. The distribution of type I collagen was mainly in the external layer of pulmonary arterial walls; the positive degrees of gray scale scanning increased and had a positive linear relationship to the mPAP and MT%. These findings suggest that the increase of type I collagen contents in pulmonary arteries is closely related to the development of HPH.     

Inhibition of the activation and collagen production of cultured rat hepatic stellate cells by antisense oligonucleotides against transforming growth factor-beta 1 is enhanced by cationic liposome delivery]

In order to investigate the inhibition of the activation and collagen production of cultured rat hepatic stellate cells (HSC) by antisense oligonucleotides (ASON) against TGF beta 1 after cationic liposome (lipofectin) delivery, the authors synthesized a 20-mer phosphorothioate antisense oligonucleotide of TGF beta 1 mRNA, and its sense of missense oligonucleotides, and then treated the HSC with cationic liposome/oligonucleotide complexes respectively. The cellular uptake of 32P-labelled oligonucleotides was determined by liquid scintillation counting, and HSC activation was assessed by the expression of alpha-smooth muscle actin(alpha-SMA). The cellular uptake of lipofectin/32P-ASON complex was approximately five-fold higher than that of 32P-ASON alone. Cationic liposome (lipofectin) delivery significantly increased the inhibition of HSCs activation by ASON, while compared with the use of naked TGF beta 1 ASON at the same concentration (at a final concentration of 1 mumol/L, P < 0.05). However, these effects were not observed in lipofectin alone, liposome/sense or missense oligos complexes at the same concentration. The oligonucleotide or lipofectin/oligos complexes had no cytotoxicity to rat HSCs in culture. These findings suggest that cationic liposome is an effective vehicle to improve the delivery of ASON to rat HSCs in culture, and the cationic liposome/TGF beta 1 ASON complex may be useful for the treatment of hepatic fibrosis.     

粘附分子在直肠腺癌患者淋巴管内皮细胞的表达

为探讨癌细胞淋巴管侵润转移机理,对８例人的直肠腺癌的癌周围组织和转移淋巴结以及５例正常人的直肠组织和淋巴结,采用免疫组织化学方法,检测ＩＣＡＭ－１和ＣＥＡ的表达。结果显示癌周直肠组织中的淋巴管及转移的淋巴结中的淋巴管内皮细胞均有ＩＣＡＭ－１和ＣＥＡ的表达。由此提示在癌细胞沿淋巴管转移过程中,ＩＣＡＭ－１和ＣＥＡ是介导癌细胞和淋巴管内皮细胞稳定粘附的分子。     

血管内皮生长因子同源体mRNA在原发性肺癌中的表达

目的：探讨血客内皮生长因子（vascular endothelial growth factor,VEGF)在原发性肺癌发生、发展、侵袭和转移等生物学行为中的作用。方法：应用反转录聚合酶链反应技术对34例原发性肺癌患者的癌组织及21例患者的正常肺组织的VEGF mRNA进行检测,统计分析VEGF mRNA的表达与肺癌的淋巴结转移,TNM分期等的关系。结果：VEGF－189mRNA在肺癌组织中的表达（61．8％）显著高于正常肺组织（4．8％,P＜0．01）。VEGF－189 mRNA在有淋巴结转移组的表达（88．2％）显著高于无淋巴结转移组（35．3％）（P＜0．01）。VEGF－189 mRNA的表达在TNMⅠ期与Ⅱ期及Ⅰ期与Ⅲ期之间有显著差异（P＜0．05）。结论：VEGF的结合型同源体VEGF－189 mRNA与原发性肺癌的发生、侵袭和转移等密切相关。     

Overexpression of Bcl-2 partly inhibits apoptosis of human ce rvical cancer SiHa cells induced by arsenic trioxide

ＳｏｍｅｒｅｓｅａｒｃｈｅｒｓｆｒｏｍｔｈｅＨａｒｂｉｎＭｅｄｉｃａｌＵｎｉｖｅｒｓｉｔｙａｎｄｔｈｅＳｈａｎｇｈａｉＳｅｃｏｎｄＭｅｄｉｃａｌＵｎｉｖｅｒｓｉｔｙｒｅｐｏｒｔｅｄｔｈａｔａｒｓｅｎｉｃｔｒｉｏｘｉｄｅ (Ａｓ2 Ｏ3)ｉｓａｎｉｄｅａｌｃｌｉｎｉｃａｌｃｏｍｐｏｕｎｄｆｏｒｔｒｅａｔｍｅｎｔｏｆａｃｕｔｅｐｒｏｍｙｅｌｏｃｙｔｉｃｌｅｕｋｅｍｉａ (ＡＰＬ)ａｎｄｉｔｃｏｕｌｄｉｎｄｕｃｅａｐｏｐｔｏｓｉｓｏｆＮＢ4ｃｅｌｌｓ 1 3　Ｔｈｒｏｕｇｈｉｎｖｉｔｒｏａｎｄｉｎｖｉｖｏｅｘｐｅｒ…     

胃癌相关抗原MG7-Ag模拟肽表位的筛选及测序分析

目的　从噬菌体呈现的随机肽库中筛选胃癌单克隆抗体MG7所识别的胃癌相关抗原的短肽模拟表位 ,为进一步研究胃癌相关抗原与单抗结合的结构基序奠定基础。方法　用胃癌单克隆抗体MG7对呈现于噬菌体衣壳蛋白pⅧ上的 2个九肽库分别进行亲和富集和免疫筛选 ;阳性克隆进一步用荧光标记和硝酸纤维素膜斑点印迹法证实其结合活性 ;经随机抽取部分阳性克隆进行DNA序列分析 ,推导出相应噬菌体呈现肽的氨基酸序列 ,通过序列比较分析相对保守的表位信息 ;运用HLA分子结合分析软件预测已测序短肽与HLA分子结合的可能性。结果　经反复多轮筛选和结合活性检测 ,从pⅧ和pⅧ cys 2个噬菌体肽库中分别得到了 12和 30个阳性克隆 ;通过对部分阳性克隆进行测序分析 ,推导相应的随机肽序列和序列比较分析 ,得到具有相对保守性的表位信息如PLX0 2 S、SAVR、XRMX、YARN等。经计算机预测分析 ,发现它们可与HLA多个分子结合。结论　PLX0 2 S、SAVR、XRMX、YARN等有可能为胃癌单克隆抗体MG7所识别的表位基序。