无创性颈动脉瞬时减速度波强测定评价左心室舒张功能的研究

目的：探讨无创检测心功能的指标—颈动脉瞬时减速度波强（W2）评价左心室舒张功能的价值。方法：测量40例高血压病患者和43例健康对照者的左、右侧颈总动脉W2,组织多普勒测定二尖瓣环运动速度和血清脑利钠肽前体（N-terminal probrain natriuretic peptide,NT-proBNP）,分析W2与各参数间的相关性。结果：①高血压组W2低于对照组,以左侧明显（1126±996vs1690±1126 mmHg.m/s3,P〈0.01）;②高血压组与对照组比较：E/Em（二尖瓣舒张早期峰值速度/二尖瓣环舒张早期纵向运动峰值速度）增大（9.37±3.32vs7.39±1.83,P〈0.01）,NT-proB-NP升高（94.6±48.5vs45.2±13.8,P〈0.01）;③相关性分析：W2与E/Em负相关（r=-0.46,P〈0.05）,与NT-proBNP负相关（r=-0.21,P〈0.05）。结论：无创性评价血流动力学的新技术指标W2是反映早期左室舒张功能受损的敏感指标。     

60Co-γ射线诱变连麦2号M3代主要农艺性状的变异及多元分析

用60Co-γ射线诱变小麦连麦2号,对M3代292个穗行进行了主要农艺性状的变异及多元分析.结果表明:各性状的变异幅度是不同的,变异系数从大到小依次为:穗数＞千粒重＞穗长＞小穗数＞株高＞行粒重＞退化小穗数＞穗粒数＞穗粒重;变异率从大到小依次为:穗数＞千粒重＞株高=行粒重＞穗粒数＞穗长＞穗粒重＞小穗数＞退化小穗数.穗数、...     

新型强脉冲光治疗雀斑临床疗效观察

目的:观察新型强脉冲光治疗雀斑的疗效。方法:采用飞顿辉煌激光360嫩肤系统(以色列飞顿公司),波长570～950nm,光斑面积10mm×30mm,脉宽10、12、15ms,能量14～19J/cm~2。治疗40例雀斑患者,每三周一次,共治疗5次,末次治疗后评价患者雀斑的疗效。结查:40例患者经过治疗后,18例(45%)基本完全消退,14例(35%)明显消退,8例(20%)好转,总有效率为100%。所有患者面部治疗区域皮肤质地较以前更光滑、细腻,无严重不良反应出现。结论:采用新型强脉冲光治疗雀斑疗效显著、安全,副作用少。     

Collaborative study for the calibration of a replacement International Standard for Tetanus Toxoid Adsorbed

We present the results of a collaborative study for the establishment of a replacement International Standard (IS) for Tetanus Toxoid Adsorbed. Two candidate preparations were included in the study, one of which was established as the 4th IS for Tetanus Toxoid Adsorbed at the WHO Expert Committee on Biological Standardization meeting in October 2010. This preparation was found to have a unitage of 490 IU/ampoule, based on calibration in guinea pig challenge assays. Results from mouse challenge assays suggest that the relative performance of two candidate preparations may differ significantly between guinea pigs and mice. The authors note that the number of laboratories that performed guinea pig challenge assays, which are used to calibrate and assign IU, is much lower than in previous collaborative studies and this may have implications for calibration of replacement standards in the future. The issue of assigning separate units to the IS for guinea pig and mouse assays is discussed. The study also assessed performance of the replacement standard in serological assays which are used as alternative procedures to challenge assays for tetanus potency testing. Results suggest that the replacement standard is suitable for use as the reference vaccine in serological assays.     

Embryo developmental disruption during organogenesis produced by CF-1 murine periconceptional alcohol consumption

The aim was to study the control females (CF)-1 mouse embryo differentiation, growth, morphology on embryonic E- and N-cadherin expression at midgestation after periconceptional moderate alcohol ingestion. Adult female mice were exposed to 10% ethanol in drinking water for 17 days previous to and up to day 10 of gestation (ethanol-exposed females, EF) and were compared with nonexposed CF. EF presented reduced quantities of E10 to E10.5 embryos, greater percentage of embryos at stages less than E7.5, reduced implantation site numbers/female, and increased resorptions compared with CF. EF-embryo growth was significantly affected as evidenced by reduced cephalic and body sizes of E10 and E10.5 embryos (scanning electron microscopy) and decreased protein content of E10.5 embryos vs. CF embryos. A significantly higher percentage of EF-E10-10.5 embryos presented abnormal neural tube (NT) closure vs. the percentage of CF. E10 embryos from EF presented elevated tissue disorganization, pyknosis and nuclear condensation in somites, mesenchymal and neuroepithelial tissue. Immunohistochemical E- and N-cadherin distribution patterns were similar in organic structures of E10 embryos between groups. However, western blot revealed that E- and N-cadherin expression levels were significantly increased in EF-derived embryos vs. controls. Perigestational ethanol consumption by CF-1 mice induced significant damage in the organogenic embryogenesis by producing delayed differentiation, growth deficiencies, and increasing the frequency of NT defects. Ethanol exposure may disrupt cell-cell adhesion leading to upregulation of E- and N-cadherin expression suggesting that deregulation of cell adhesion molecules could be involved in the disruption of embryo development at organogenesis in CF-1 mouse.     

牛磺胆酸钠在大鼠急性胰腺炎模型中的半数致死量（LD50）研究

目的：通过使用不同浓度的牛磺胆酸钠（Tc）建立急性胰腺炎（AP）模型,观察相应的死亡率,进而计算其半数致死量。方法：使用不同浓度的TC（0％（wt／v1）、1％、2％、3％、4％、5％、9％）观察AP造模72小时后各组的死亡率。同时分析TC浓度与组织病理评分、血清淀粉酶和外周血细胞变化的相美性。结果：TC的卓数致死量为3．409％。并且,TC的浓度与组织病理评分、血清淀粉酶和外周血细胞变化密切相关。结论：TC所致AP造模的最佳剂量为3．409％。     

人膝骨关节炎软骨下骨OPN的表达及其意义

目的：通过检测人膝骨关节炎裸露软骨下骨中OPN的表达,探讨OPN在OA发病及病情进展中的意义。方法：选取接受膝关节置换手术的膝关节骨关节炎患者软骨下骨标本50例,采用综合评分法对OA患者进行严重程度分级,分为轻、中、重度三组,取正常膝关节软骨下骨（股骨髁关节面）10例作为正常软骨下骨对照;对标本进行免疫组织化学染色,用SPSS17．0统计软件包分析各组间OPN表达的差异及OA患者OPN表达与综合评分、K-L分期的相关性。结果：人膝骨关节炎裸露软骨下骨OPN表达明显高于正常软骨下骨组,差异有统计学意义（P〈0．01）;OPN在轻、中、重度膝骨关节炎裸露软骨下骨的表达差异有统计学意义（P〈0．05）;膝骨关节炎裸露软骨下骨OPN的表达与骨关节炎的综合评分、K—L分期呈正相关。结论：OA患者膝关节软骨下骨OPN表达与疾病严重程度呈正相关,提示OPN在骨关节炎发病及病情进展中可能起作用。     

SPARC在子宫内膜癌组织中的表达及意义

目的：探讨富含半胱氨酸的酸性分泌型蛋白（secreted protien,acidic and rich in cysteine,SPARC）在子宫内膜癌组织中的表达及其临床意义。方法：应用组织芯片技术研究SPARC在正常子宫内膜、增生的子宫内膜和子宫内膜癌组织中的表达情况。结果：SPARC在正常子宫内膜、增生的子宫内膜和子宫内膜癌组织中的阳性表达率分别为96.55%、76.79%、59.50%,差异具有统计学意义（P〈0.05）。在子宫内膜癌中,SPARC的表达强度与手术-病理分期、组织学分级、肌层浸润深度和淋巴结转移相关,差异具有统计学意义（P〈0.05）。结论：SPARC表达的缺失与子宫内膜癌的发生、发展密切相关,检测SPARC可为子宫内膜癌的早期诊断、进一步治疗及预后判断提供一定的理论依据。     

国产房缺封堵器治疗多孔型房缺

目的：评估国产封堵器治疗多孔型房缺的可行性及安全性。方法：在X线及超声引导下对19例多孔型房缺植入国产房缺封堵器,术后常规进行心电图及经胸心脏超声随访半年。结果：所有患者均成功进行了房缺封堵,其中5例放置1枚国产普通型房缺封堵器,7例放置2枚国产普通型房缺封堵器,另7例则分别放置1枚细腰大边型房缺封堵器,术后即刻超声检查1例仍有少许分流,术后1月时随访分流消失,所有患者随访半年未出现明显并发症。结论：国产房缺封堵器可安全应用于多孔型房缺患者的封堵治疗,在经验丰富的先心病介入治疗专科中心,封堵治疗可做为部分多孔型房缺患者的首选治疗。     

促卵泡激素结合片段通过P13K／Akt—cyclinD1通路抑制卵巢癌细胞增殖活性

目的：研究促卵泡激素（FSH）结合片段对卵巢上皮性细胞癌细胞株hey增殖活性的影响。方法：应用卵巢上皮性细胞癌细胞株hey作为实验对象,分别加入FSH、FSH结合片段、FSH＋FSH结合片段。用四甲基偶氮唑蓝（MTT）法检测卵巢癌hey细胞的生长状况,Westernblot检测cyclinD1、Akt、pAkt分子的表达。结果：FSH对卵巢癌hey细胞的生长有明显的促进作用,细胞生长活性提高21％。FSH结合片段对卵巢癌细胞的生长有明显抑制作用,对细胞平均抑制率为22％,且能下调cyclinD1的表达,在2．5×10^-9Mol／L达70％。FSH结合片段对FSH有竞争抑制作用,细胞抑制率为18％,能抑制FSH上调cyclinD1的作用,抑制率为61％。FSH能上调pAkt的表达,对Akt的袁达没有明显影响,在40mlU／ml的浓度时pAkt／Akt上调率达224％。FSH结合片段对Akt的表达没有明显影响,但能明显下调pAkt的表达,且呈时间依赖性（在15分钟时达66％）和剂量依赖性（在2．5×10^-9Mol／L达31％）。FSH结合片段能抑制FSH上调pAkt的作用,抑制率为80％。结论：FSH结合片段可通过抑制FSH诱导的P13FdAkt-cycl—inD1信号通路进而抑制上皮性卵巢癌hey细胞的增殖活性,