不同年龄高血压大鼠心肌中MKP-1的表达及对心肌肥厚的影响

目的：研究不同年龄的自发性高血压大鼠（SHR）和Wistar Kyoto大鼠（WKY）心室肌组织中丝裂原活化蛋白激酶（MAPK）及其磷酸酶（MKP-1）的表达以及与心肌肥厚的关系。方法： 用左心室重量与体重的比值作为心肌肥大指数并以此指标反映心肌肥厚；分别用Western blotting方法和RT-PCR法半定量测定心室肌组织中磷酸化细胞外信号调节激酶（p-ERK）的蛋白表达和MKP-1 mRNA的含量。结果： （1）SHR的血压自8周龄起明显高于WKY（P<0.01），心肌肥大指数明显大于WKY（P<0.05），ERK和MKP-1的表达均比WKY高（P<0.05）；（2）SHR的血压随年龄增长而升高（P<0.05），至14周趋于稳定，心肌肥大指数则在24周时出现激增（P<0.01）；（3）p-ERK随年龄增长呈递增趋势，而MKP-1呈递减趋势，且与心肌肥大指数和ERK的表达呈负相关（P<0.01）。结论： MKP-1在高血压大鼠随年龄和血压增加的心肌肥厚过程中起重要作用，其表达逐渐下降可能是导致ERK激活增加，进而引起心肌细胞肥大的重要原因。     

Nucleolar localization of non-structural protein 3b, a protein specifically encoded by the severe acute respiratory syndrome coronavirus

The open reading frame 3 (ORF3) of the severe acute respiratory syndrome coronavirus (SARS-CoV) genome encodes a predicted 154-amino acid protein, which lacks similarities to any known protein, and is named 3b. In this study, it was shown that 3b protein was predominately localized to nucleus with EGFP tag at its N- or C-terminus. The localization patterns were similar in different transfected cells. Immuno-fluorescence assay revealed that 3b protein was co-localized well with C23 in nucleolus. C23, B23 and fibrillarin all are important nucleolar proteins, which localize in the region of the nucleolus. Co-transfection of p3b-EGFP with pC23-DsRed, pB23-DsRed and pfibrillarin-DsRed further confirmed 3b's nucleolus localization. With construction of serial truncated mutants of 3b, a region (residues 134-154 aa) responsible for nucleolar localization was determinated in 3b protein. These results provide a new insight for further functional studies of SARS-CoV 3b protein.     

输尿管狭窄的应用解剖学研究

目的:探讨输尿管生理狭窄的数目、位置及狭窄的程度,为选择性CT分段扫描诊断输尿管结石提供解剖学依据.方法:解剖30例国人成人尸体60条输尿管(男40条,女20条),分段观测输尿管形态、狭窄的数目、位置和管腔内径.结果:各段输尿管形态多样,主要有四类.输尿管生理狭窄的程度依次为膀胱壁内段＞输尿管盆段＞输尿管髂血管段＞输尿管腹段.结论:输尿管生理狭窄的数目不恒定.生理狭窄的部位除膀胱壁内段外其余部位均不恒定,膀胱壁内段狭窄程度最大.     

一氧化氮与白细胞精子症不育的关系探讨

目的　探讨一氧化氮 (NO)与白细胞精子症不育的关系。方法　参照WHO标准方法 ,进行精液常规分析。采用过氧化物酶染色法检测精液中白细胞密度。用改良的低渗肿胀法检测精子细胞膜的完整性。采用镀铜镉还原荧光法 ,检测精液中NO代谢产物硝酸盐 (NO 3 )。结果　白细胞精子症不育组白细胞的密度为 (1.4 8± 0 .90 )× 10 9/L ,NO水平为 (10 3.5± 2 .0 ) μmol/L ,显著高于正常生育组的(0 .73± 0 .2 8)× 10 9/L和 (41.6± 1.8) μmol/L (P分别为<0 .0 5和 <0 .0 0 1)。精子的活动率、精子速度试验 (SVT)及精子头、尾部膜完整率 ,均明显低于生育组 (P <0 .0 1) ,而精子的死亡率则显著高于生育组 (P <0 .0 1)。结论　NO水平与白细胞密度呈正相关 ;与精子的活动率、SVT及精子头、尾膜的完整率呈负相关。表明当精液中的白细胞增高时 ,可产生过量的NO导致精子中毒受损使精子的受精能力下降     

结核分枝杆菌Ag85B与IL-12基因真核共表达质粒的构建及表达

目的 :构建结核分枝杆菌Ag85B和鼠IL 12基因的共表达载体pBud85B IL12。方法 :将结核分枝杆菌Ag85B基因和鼠IL 12基因同时克隆入含多启动子的共表达载体pBudCE4 .1中 ,构建真核共表达质粒pBud85B IL12。以pBud85B IL12转染COS 7细胞 ,通过RT PCR及ELISA方法检测目的基因的表达。结果 :在COS 7细胞中同时可检测到Ag85B和IL12的表达。结论 :pBud85B IL12共表达质粒的成功构建 ,为对其免疫原性、免疫反应性及免疫保护作用的进一步研究奠定了基础     

Effects of chloride and potassium channel blockers on apoptotic cell shrinkage and apoptosis in cortical neurons

K⁺ and Cl^– homeostasis have been implicated in cell volume regulation and apoptosis. We addressed the hypothesis that K⁺ and Cl^– efflux may contribute to apoptotic cell shrinkage and apoptotic death in cultured cortical neurons. CLC-2 and CLC-3 chloride channels were detected in cultured cortical neurons. The Cl^– channel blockers 4,4-diisothiocyanatostilbene-2,2-disulfonic acid (DIDS), 4-acetamido-4-isothiocyanatostilbene-2,2-disulfonic acid (SITS) and 5-nitro-2-(3-phenylpropylamino)-benzoic acid (NPPB) inhibited the outwardly rectifying Cl^– current, prevented apoptotic cell shrinkage, and mildly attenuated cell death induced by staurosporine, C₂-ceramide, or serum deprivation. Cl^– channel blockers, however, at concentrations that prevented cell shrinkage had no significant effects on caspase activation and/or DNA fragmentation. Cell death in the presence of a Cl^– channel blocker was still sensitive to blockade by the caspase inhibitor z-Val-Ala-Asp(OMe)-fluoromethyl ketone (z-VAD-fmk). Electron microscopy revealed that, although DIDS prevented apoptotic cell shrinkage, certain apoptotic ultrastructural alterations still took place in injured neurons. On the other hand, the K⁺ channel blocker tetraethylammonium (TEA), clofilium, or the caspase inhibitor z-VAD-fmk prevented cell shrinkage as well as caspase activation and/or DNA damage, and showed stronger neuroprotection against apoptotic alterations and cell death. The results indicate that neurons may undergo apoptotic process without cell shrinkage and imply distinct roles for Cl^– and K⁺ homeostasis in regulating different apoptotic events.     

我院基于XML异构数据集成的开发应用及研究

基于XML的数据集成，Web Services中间件能够较容易地实现对各数据源的描述以及数据源之间的数据转换，它在应用程序和数据库之间起着接口的作用．本文结合实际医院信息工作，运用VFP9 COM模型，作了有效性的研究及应用，并对标准数据集的二次开发进行了讨论。结果表明，该方法用于医院跨网络平台、跨应用系统、异构信息集成是有效的和易于操作的。     

Endometrial and subendometrial blood flow measured during early luteal phase by three-dimensional power Doppler ultrasound in excessive ovarian responders

BACKGROUND: Impaired implantation in assisted reproduction cycles with high serum estradiol (E(2)) concentrations may be related to suboptimal endometrial perfusion. Endometrial and subendometrial blood flow were compared between excessive responders (serum E(2) on the day of HCG >20 000 pmol/l) and moderate responders (E(2) < or =20 000 pmol/l). METHODS: Three-dimensional (3D) ultrasound examination with power Doppler was performed 2, 4 and 7 days after HCG in 32 patients who did not have embryo transfer in order to measure endometrial thickness, pulsatility index (PI)/resistance index (RI) of uterine vessels, and endometrial volume, vascularization index (VI)/flow index (FI)/vascularization flow index (VFI) of endometrial and subendometrial regions. RESULTS: Excessive responders tended to have lower endometrial and subendometrial VI/VFI on HCG +2 and more absent endometrial/subendometrial blood flow. They had significantly higher endometrial FI and subendometrial VFI than moderate responders on HCG +7. Only in the excessive responder group, uterine PI/RI declined significantly from HCG +2 to HCG +7 and endometrial VI/VFI increased significantly from HCG +4 to HCG +7. CONCLUSION: Changes in uterine Doppler flow indices, and endometrial and subendometrial 3D power Doppler flow indices during the early luteal phase were significantly different between moderate and excessive responders.     

基于 C/S与B/S混合模式的重症肌无力管理系统的设计与研制

重症肌无力临床医生在就诊过程中收集了大量的临床资料,但是面对庞大而又杂乱的临床资料,人工对其进行管理、查询、统计分析等显然不可取,费时费力且更不用说从中“挖掘”出有用的信息以辅助诊断;此外,对于病人服药情况、疗效的随访等也难于开展,更不用说在医院各科室内部、Internet上共享临床资料。基于此,本文开发了以C/S和B/S混合模式的重症肌无力信息系统,以期为临床和科研做出一定的贡献。     

不同年龄高血压大鼠血管平滑肌中ERK和MKP-1的表达

目的：研究不同年龄的自发性高血压大鼠（SHR）和Wistar Kyoto大鼠（WKY）主动脉平滑肌中丝裂原活化蛋白激酶（MAPK）及其磷酸酶（MKP-1）的表达及其与高血压的关系。 方法： 用tail-cuff测量大鼠尾动脉血压；分别用Western blotting法和RT-PCR法半定量测定血管平滑肌中磷酸化细胞外信号调节激酶（p-ERK）和MKP-1的蛋白表达以及MKP-1 mRNA的含量。 结果： （1）SHR的血压自8周龄起明显高于WKY（P<0.01），且随年龄增长而升高（P<0.05）至14周以后趋于稳定；（2）SHR主动脉平滑肌中的p-ERK表达明显高于同年龄的WKY（P<0.01），随年龄增长而递增（P<0.05），与血压呈正相关；（3）SHR主动脉平滑肌中MKP-1蛋白明显高于同龄WKY，而mRNA的表达在5周龄时明显高于WKY，之后均随年龄的增长而递减（P<0.05），与血压和ERK呈负相关，而WKY下降不明显。 结论： MKP-1在高血压的发生和发展过程中起重要作用，其表达逐渐下降可能是导致ERK激活增加，从而导致血管平滑肌细胞增殖、血压升高的重要原因。