性激素受体及相关生长因子在前列腺基质细胞中的表达

目的：探讨前列腺基质增生的发病机制与性激素以及相关生长因子的关系。方法：应用RT－PCR的方法研究了在人前列腺不同细胞类型中Smoothelin的表达，研究了雄、雌激素受体及相关生长因子在前列腺基质细胞中的表达，以及它们在前列腺基质细胞分化中表达的变化。结果：Smoothelin是前列腺平滑肌细胞特异性的标记蛋白；雄激素受体（AR）、碱性成纤维细胞生长因子（bFGF)、角化细胞生长因子（KGF）主要在前列腺成纤维细胞中表达，而雌激素受体（ER）、转移生长因子β1（TGFβ1）主要在平滑肌细胞中表达。结论：前列腺基质增生与雌激素受体和转移生长因子β1的过度表达密切相关。     

人部分正常与肿瘤细胞株中neuritin表达的检测

目的:筛选neuritin高表达及低表达细胞株,为进一步探讨neuritin在不同组织细胞生长发育过程中的作用奠定基础.方法和结果:分别利用RT-PCR与免疫组化技术在mRNA水平及蛋白水平,检测了11种人类细胞株中neuritin的表达情况,发现不仅在多种正常细胞中有表达,而且在部分肿瘤细胞中也有表达.结论:成功筛选出了neuritin高表达及低表达细胞株.     

脑胶质瘤白细胞介素-6自分泌或旁分泌环路的研究

目的　研究白细胞介素 6(IL 6) /IL 6受体 (IL 6R)自分泌或旁分泌环路与脑胶质瘤的关系。方法　采用逆转录 聚合酶链反应 (RT PCR)方法检测IL 6和IL 6R基因在 4株脑胶质瘤细胞株、62例脑胶质瘤组织标本、5例良性脑膜瘤组织和 5例人正常脑胶质细胞中的表达 ;将IL 6单抗 (McAb)或IL 6RMcAb与脑胶质瘤细胞共同孵育 ,四甲基偶氮唑蓝 (MTT)比色法检测对细胞生长的抑制作用。结果　脑胶质瘤细胞株C6、9L、U 2 5 1和SHG44均有IL 6和IL 6R的表达 ,脑胶质瘤组织标本中 47例 (75 .81% )表达IL 6、5 2例 (83 .87% )表达IL 6R、41例 (66.13 % )同时表达IL 6和IL 6R ;良性脑膜瘤组织 4例表达IL 6,人脑正常胶质细胞仅有IL 6弱表达 ,两者均无IL 6R表达。IL 6McAb和IL 6RMcAb能够显著抑制脑胶质瘤细胞的增殖 ,并存在剂量依赖关系(P <0 .0 1)。结论　脑胶质瘤很可能存在IL 6/IL 6R自分泌或旁分泌环路 ,阻断此环路可以明显抑制胶质瘤细胞的恶性增殖     

Fluorescence behaviour of human arterial tissue

Total fluorescence from arterial tissue is influenced by three factors: the absorption coefficient of tissue at a specific excitation wavelength, the laser excitation power and the fluorescence coefficient which is related to chemical species in tissue. These various influences were demonstrated by the following experimental results in vitro: (1) the effect of increasing power on fluorescence intensity, (2) the total fluorescence intensity in normal aorta and plaque and (3) the effect of a chromophore such as β-carotene on total fluorescence intensity. The fluorescence intensity of normal artery is an incremental function of laser excitation power, and the fluorescence emission from normal artery compared to fluorescence emission from plaque is significantly different at the same excitation power. The total fluorescence of normal artery was measured to be twice as great as that of atheromatous plaque (relative mean ratio of 2.58±0.46 compared to unity,p<0.0002 at 488 nm; relative mean ratio of 2.57±0.51 compared to unity,p<0.0009 at 514 nm). The total fluorescence emission decreases with the increase of β-carotene content in arterial tissue (R=0.97). These emission differences, when intensified by an exogenous chromophore of β-carotene, may provide an improved guidance signal for diagnosis of plaque from normal artery during laser angioplasty procedures.     

Genetic typing of human platelet antigen 1 (HPA-1) by oligonucleotide ligation assay in a specific and reliable semi-automated system

Genotyping of platelet alloantigens with the possibility of using any type of cellular material as a source of DNA has become a preferred procedure, particularly in thrombocytopenic patients when platelet counts are too low for phenotyping. Recently human platelet antigen 1 (HPA-1) has been identified as an inherited risk factor for coronary thrombosis. The different detection methods currently used have disadvantages for large-scale DNA diagnosis, including the need for electrophoresis (allele-specific restriction enzyme analysis, amplification with sequence-specific primers) or the potential risk of reduced specificity (allele-specific oligonucleotide hybridization). In this report we describe the adaptation of an automated oligonucleotide ligation assay to genotype HPA-1 in polymerase chain reaction (PCR)-amplified DNA samples. HPA-1a and HPA-1b phenotypes corresponded to the results of the different genotyping assays. The genotypes determined with the ELISA-based PCR-oligonucleotide ligation assay were in 100% concordance with the results obtained by conventional allele-specific restriction enzyme site analysis and PCR amplification with sequence-specific primers. The automated oligonucleotide ligation assay provides a rapid, reliable, nonisotopic method to genotype human platelet antigens that can rapidly be applied to large population screening.     

放射性核素人体全身骨显像及其定量分析

对12例非恶性肿瘤和骨性疾病患者(对照组）全身不同部位骨显像和43例恶性肿瘤患者的异常浓聚区进行定量分析。结果表明，对照组两侧相应部位的放射性比值（H值）约为1.05。若以阳性判断际准，43例恶性肿瘤患者138处病灶中有135处为阳性（9738％）。应用ROI计算H值不仅为骨显像的评价提供了客观的定量指标，而且提高了对鼻咽、胸骨、骶椎等处病变诊断的准确性。     

维生素K对HBsAg与抗HBS结合的抑制作用

在ＲＰＨＩ试验中，将ＶｉｔＫ１或ＶｉｔＫ３预先与ＨＢｓＡｇ阳性血清作用后，再加抗ＨＢｓ单克隆抗体诊断红细胞，可见红细胞呈圆点状沉淀，提示ＨＢＳＡｇ与抗ＨＢｓ的结合受到抑制，该抑制作用呈浓度依赖性．ＲＰＨＩ试验后的抗ＨＢｓ单克隆抗体诊断红细胞，经洗涤后再与ＨＢｓＡｇ阳性血清作用，仍出现明显凝集，表明ＶｉｔＫ对ＨＢｓＡｇ与抗ＨＢｓ结合的抑制作用不是通过影响抗ＨＢｓ而产生的。     

缺失型DMD／BMD患者PCR快速检测的可行性与意义

应用对应于Ｄｙｓｔｒｏｐｈｉｎ基因缺失热区的二对ＰＣＲ引物和一对内对照无关引物，在同一反应体系中扩增，检测６６例ＤＭＤ／ＢＭＤ患者。发现其中２５例存在１７号或４９号外显子缺失，与同时采用ｃＤＮＡ探针杂交检测出的３５例基因缺失相比．检出率达７１．４％。说明该扩增系统能够作为快速筛查缺失型ＤＭＤ／ＢＭＤ患者的有效手段。这对指导合理选用探针，尤其在产前诊断方面，具有重要意义。     

重油和沥青中饱和碳的定量估计

建立了较完整的估计重油和沥青中饱和碳浓度数方法，其中包括环烷桥头碳、环烷甲基取代碳、环烷烷基（≥Ｃ２）取代碳等。基于理论分析，建立了估计环间的桥链和各种平均结构参数的方法，包括平均芳环环核数和环烷环环核数、芳环和环烷环烷工取代度、单元片上芳环和环烷环数。从实验数据出发，提出了烷基链长分布的公式。