多西紫杉醇对人舌鳞癌Tca8113细胞的生长抑制作用

目的研究多西紫杉醇对人舌鳞癌Tca8113细胞增殖及凋亡的作用。方法将0．1μmol／L的多西紫杉醇分别作用于Tca8113细胞12、24、48h,分别用倒置显微镜观察细胞形态、流式细胞术检测细胞凋亡状况;将浓度为0．001、0．01、0．1、1、10μmol／L的多西紫杉醇分别作用于Tea8113细胞12、24、48h后,用MTT法检测细胞增殖状况。结果多西紫杉醇对Tea8113细胞的增殖有明显的抑制作用,且浓度在0．001、0．01、0．1、1、10μmol／L时呈时间和浓度依赖性;镜下可见典型的凋亡细胞形态学特征。流式细胞术检测：多西紫杉醇浓度为0．1μmol／L时,作用12、24、48h,凋亡率增加,细胞阻滞于G2／M期。结论多西紫杉醇对Tca8113细胞有增殖抑制和诱导凋亡作用,这可能与抗癌机制有关。     

紫杉醇诱导黑色素瘤细胞凋亡的研究

目的：探讨紫杉醇体外抑制人黑色素瘤细胞（A375细胞）增殖及诱导凋亡作用机制。方法：四甲基偶氮唑蓝（MTT）还原法测定细胞活力；光镜和电镜观察细胞形态变化；流式细胞术（FCM）检测细胞周期和凋亡率。结果：紫杉醇通过诱导细胞凋亡抑制A375细胞生长。并呈时间和剂量依赖性（P〈0．01）；当0．01-1μmol／L紫杉醇作用于培养细胞24h后即可引起猾亡小体等典型细胞凋亡形态学改变；FCM分析显示：紫杉醇在0．001μmol／L即可诱导细胞凋亡，但不影响细胞周期，在0．01μmol／L时使G0／G1期细胞明显减少，在0．1μmol／L以上时使细胞发生G2／M期阻滞。结论：紫杉醇具有抑制A375细胞生长和诱导细胞凋亡作用。不同浓度紫杉醇诱导细胞凋亡的作用机制不同。     

姜黄素诱导髓系白血病细胞凋亡的分子途径

目的研究姜黄素诱导白血病细胞系NB4、K562、THP1凋亡的分子途径。方法培养上述3种细胞系，用不同浓度的姜黄素（25，12．5，6．25，3．125，0μmol／L）作用24h和25umol／L姜黄素作用不同时间（0，12，24，48h），流式细胞仪测定细胞凋亡率及Fas抗原（CD95）表达，Western blot测定凋亡蛋白Caspase-8、Caspase-9的表达变化。结果①姜黄素以时间和浓度依赖的方式诱导白血病细胞系NB4、K562、THP-1凋亡，25μmol／L姜黄素作用48h凋亡细胞超过50％。②25μmol／L姜黄素作用24h后Fas抗原表达明显升高（P〈0．01）。③25μmol／L姜黄素作用24h后凋亡蛋白Caspase-8、Caspase-9的表达明显增高（P〈0．01）。结论姜黄素诱导白血病细胞凋亡涉及死亡受体参与的外源性途径和线粒体参与的内源性凋亡途径。     

TAM诱导MA782细胞凋亡与CDK4关系

目的 探讨Tamoxifen（TAM）诱导ER（-）小鼠乳腺癌细胞MA782细胞凋亡及其分子作用机制。方法 TAM体外作用于MA782细胞，用MTT法检测细胞增殖活性、流式细胞仪检测细胞凋亡和细胞周期分布，免疫组化检测CDK4蛋白表达，并用病理图像分析软件进行半定量分析。结果 6、10μmol／L TAM在体外能明显抑制MA782细胞生长，诱导细胞凋亡，作用24h细胞凋亡率分别为7．04％、19．04％，10μmol／L TAM作用48h后细胞凋亡率从19．04％上升到51．27％，与对照组比较有显著差异（P〈0．01）。2μmol／L TAM作用于细胞不同时间后检测CDK4蛋白，与对照组无明显变化（P〉0．05），而6、10μmol／L TAM作用不同时间后，CDK4蛋白表达有不同程度的下降，与对照组相比差异显著（P〈0．05或P〈0．01）。结论 TAM诱导MA782细胞凋亡其分子作用机制可能与下调细胞CDK4蛋白表达有关。     

佛波酯慢性处理对大鼠血管平滑肌细胞各亚型蛋白激酶C表达的影响

目的观察佛波酯（PMA）慢性处理大鼠血管平滑肌细胞各亚型蛋白激酶C（PKCs）表达的影响。方法原代培养大鼠m管平滑肌细胞,①按照PMA处理浓度将细胞随机分为空白组、0．25％eDMSO组和PMAI、5、10μmol／L组,各组细胞均处理4h;②按照PMA处理时间将细胞随机分为空白组、0．25％eDMSO组和PMA1、4和24h组,PMA组的药物浓度均为10μmol／L。采用Western blotting技术榆测各亚型PKCs蛋白的表达。结果PMA浓度〈10μmol／L处理细胞时间〈4h不影响PKC—α的表达（P〉0．05）,10pmlol／LPMA处理24h能抑制PKC—α的表达（P〈0．05）;PMA浓度〉5μmol／L处理细胞时间〉4h可明显抑制PKC-δ的表达（P〈0．01）,PMA浓度〈5μmlol／L处理细胞时间〈4h对PKC-δ的表达无显著影响（P〉0．05）,10μmol／LPMA处理细胞1h即可明显抑制PKC-δ的表达（P〈0．01）;PMA浓度〉5pμmol／L处理细胞时间〉4h可以明显抑制PKC-θ的表达（P〈0．01）;10μmol／L的PMA处理细胞24h对PKC．∈的表达无明显影响（P〉0．05）。结论PMA慢性处理大鼠血管平滑肌细胞可抑制传统型PKC—α和新型PKC-δ、ε、θ的表达,对非典型PKC-ζ的表达没有影响。     

柔红霉素诱导Jurkat细胞凋亡、抑制增殖与bcl-2、PCNA表达变化的关系

目的探讨柔红霉素（DNR）在体外诱导Jurkat细胞凋亡的情况并探讨其与细胞表达凋亡相关蛋白改变的关系。方法Annexin V／PI双标流式细胞仪（FCM）检测DNR诱导Jurkat细胞的凋亡作用,用免疫细胞化学观察相关蛋白表达水平的变化。结果当DNR为0．1～2．0μmol／L浓度范围时,作用一定时间后Jurkat细胞发生的凋亡率随药物浓度的增加与作用时间的延长而升高。但药物浓度超过2．0μmol／L,或2．0μmol／L作用48h后Jurkat细胞出现凋亡率下降,细胞大部分死亡。0．5μmol／L DNR作用于Jurkat细胞24h后,细胞中bcl-2、PCNA蛋白表达水平降低。结论一定浓度的DNR在体外可诱导Jurkat细胞凋亡,药物浓度达5．0μmol／L时细胞大部分死亡。本实验条件下DNR体外诱导Jurkat发生凋亡的机制可能是通过抑制bcl-2、PCNA蛋白的表达实现。     

白藜芦醇对人宫颈癌SiHa细胞增殖与凋亡作用的影响

目的：探讨白藜芦醇（Res）诱导宫颈癌SiHa细胞凋亡的作用及可能的机制．方法：MTT法检测不同浓度（0,12．5,25,50,100,200,300,400和600μmol／L）Res处理24,48和72h对SiHa细胞的抑制率;流式细胞仪采用AnnexinV和PI双染检测细胞的凋亡率．荧光显微镜观测SiHa细胞的形态学改变．分光光度法检测Caspase-3活性．结果：Res在一定浓度范围内,以浓度和时间依赖的方式抑制宫颈癌SiHa细胞的生长（P〈0．05）．以0,200和300μmol／L Res处理细胞48h,SiHa细胞早期凋亡率分别为1．1％,8．9％和11．1％,晚期凋亡比例为3．1％,15．0％和14．0％．荧光显微镜下细胞呈现典型的凋亡性改变．200μmol／L Res处理8h后,Caspase-3活性增加,24h达高峰,后逐渐下降,经50,100和200μmol／L Res处理24h后,Caspase-3活性与对照组相比,分别增加了1．92倍,2．51倍和4．53倍（P〈0．05）．结论：白藜芦醇通过诱导Caspase-3活性增加以时间依赖和浓度依赖的方式抑制宫颈癌SiHa细胞增殖,诱导细胞凋亡．     

姜黄素对血管平滑肌细胞源性荷脂细胞胆固醇代谢及SREBP-1表达的影响

目的观察姜黄素对血管平滑肌细胞源性荷脂细胞胆固醇代谢的影响，并初步探讨SREBP-1蛋白表达在其中的作用。方法以血管平滑肌细胞源性荷脂细胞为模型，不同浓度姜黄素（12．5、25．0、50．0μmol／L）作用于细胞24h及25．0μmol／L姜黄素不同时间（0、6、12、24、48h）作用于细胞，高效液相色谱分析法检测细胞内总胆固醇。游离胆固醇和胆固醇酯的含量。在SREBP-1蛋白抑制剂ALLN干预下，25．0μmol／L姜黄素处理平滑肌细胞源性荷脂细胞24h，Western印迹法检测SREBP-1蛋白的表达。结果不同浓度姜黄素（12．5、25．0、50．0μmol／L）作用于血管平滑肌细胞源性荷脂细胞24h及25．0μmol／L姜黄素不同时间（0、6、12、24、48h）作用于血管平滑肌细胞源性荷脂细胞，细胞内总胆固醇，游离胆固醇和胆固醇酯含量呈现一定的剂量和时间依赖性下降趋势；在SREBP-1蛋白抑制剂ALLN干预下，25．0μmol／L姜黄素处理平滑肌细胞源性荷脂细胞24h，SREBP-1表达下调，总胆固醇、游离胆固醇和胆固醇酯含量无明显变化。结论姜黄素能引起血管平滑肌细胞源性荷脂细胞总胆固醇、游离胆固醇和胆固醇酯含量下降，且这种作用跟SREBP-1蛋白的表达上调有一定关系。     

辛伐他汀对急性早幼粒细胞白血病NB4细胞NF-kB信号通路的影响

目的探讨辛伐他汀对人急性早幼粒细胞白血病细胞株（NB4细胞）增殖与凋亡的影响以及对凋亡信号转导通路NF．KB通路相关基因mRNA表达的影响,以探讨辛伐他汀抗白血病效应及可能机制。方法以不同浓度辛伐他汀处理NB4细胞,取对数生长期细胞进行实验。实验分为阴性对照组和辛伐他汀处理组（终浓度分别为5、10、15μmol／L）,培养24、48、72h。采用MTT法观察NB4细胞增殖能力;流式细胞术测定NB4细胞凋亡指标Annex—inV／propidiumiodide变化;PCR芯片研究NB4细胞NF—KB通路相关基因mRNA的差异表达。结果辛伐他汀对NB4细胞的生长有明显抑制作用和促凋亡作用（均P〈0．01）,且呈时间与剂量依赖性。15μmol／L辛伐他汀处理NB4细胞24、48、72h细胞抑制率分别达到45．75％、92．91％、96．46％,而细胞早期凋亡率分别为30．25％、64．34％、87．38％。与对照组相比,15μmol／L辛伐他汀处理NB4细胞48h组中NF—KB通路有56个基因表达发生改变,其中47个基因表达下调、9个基因表达上调。结论辛伐他汀能抑制NB4细胞增殖并诱导其凋亡,其诱导凋亡机制可能与辛伐他汀调节NF—KB通路相关基因的表达有关。     

磁性纳米紫杉醇微球对人胃癌细胞SGC-7901增殖和凋亡的影响

目的观察不同浓度磁性纳米紫杉醇微球在不同时间段对人胃癌细胞株SGC-7901生长和凋亡的影响。方法实验分为实验组和对照组。实验组:磁性纳米紫杉醇微球0.01、0.05、0.1、0.5、1 μ mol/L。对照组:紫杉醇0.01、0.05、0.1、0.5、1μmol/L;5-氟尿嘧啶1、5、10、50、100μmol/L及空白阴性对照。应用MTT法测定上述不同浓度的磁性纳米紫杉醇、紫杉醇、5-氟尿嘧啶对SGC-7901细胞分别在6、12、24、48、72小时的生长抑制率。流式细胞仪分析细胞周期的改变,细胞免疫组化检测凋亡相关基因Bcl-2蛋白的表达。结果MTT法显示不同浓度的磁性纳米紫杉醇微球可抑制SGC-7901细胞增殖(1 μ mol/L作用72小时时的抑制率达72.6%),与浓度和时间均呈正相关;流式细胞仪细胞周期分析提示磁性纳米紫杉醇微球可将SGC-7901细胞阻滞于G2M期(0.5μmol/L作用48小时阻滞率达43.8%±0.8%);免疫组化法显示凋亡相关基因Bcl-2蛋白表达下调。结论磁性纳米紫杉醇微球可诱导人胃癌细胞SGC-7901发生凋亡且具有控释效应,可延长药物对胃癌细胞的有效作用时间;载药...     

Value of D-Dimers in patients with acute aortic dissection

Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P ＜ 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (＞0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P ＜0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P ＜ 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.     

Research of combined liver-kidney transplantation model in rats

Objective： To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods： SD rats served as both donors and recipients. 4℃ sodium lactate Ringer＇s was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava （IVC） inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results： Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion： This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.     

BLOOD PRESSURE CHANGE WITH AGE IN SALT-SENSITIVE TEENAGERS

Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P＜ 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P＜ 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.     

安心颗粒对急诊经皮冠状动脉介入术后生活质量影响的研究

目的：评价使用安心颗粒对急诊经皮冠状动脉介入术（PPCI）术后生活质量的影响.方法：将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组（术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次）和对照组（仅接受基础药物治疗）.所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表（MIDAS）、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果：入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异（P＞0.05）;出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低（P＜0.05）;组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低（P＜0.05）.两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血（P＞0.05）.两组发生轻度血小板减少症的患者数比较无差异（P＞0.05）.结论：PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.     

The comparative studies of the influences of Urapidil and Nicardipine on sino-atrial node function, atrio-ventricular node function and hemodynamics

Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P＜0.01);the MAP decreased(P＜0.01)and the HR increased drastically(P＜0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.     

Expression of OPGmRNA and ODFmRNA in the patients of hip fracture due to osteoporosis

Objective：To investigate the gene expression of osteoprotegerin（OPG） and osteoclast differentiation factor（ODF） in the bone tissue of patients with hip fracture due to osteoporosis. Methods：OPGmRNA and ODFmRNA in the bone tissue in 50 cases of osteoporosis sufferers（over 50 years old） with hip fracture（Observer Group） and 30 cases of hip facture sufferers with no osteoporosis（Control group） were analyzed with the Semi-Quantitative RT-PCR method. Results：The mRNA expressed of ODF, OPG were both high in the patients with hip fracture. In the control group, the expression of OPG mRNA was observed, while the expression of ODF mRNA was very slight. Conclusion：Aged patients contained all signals including OPG, ODF that are essential for inducing osteoclastogenesis and promoting bone resorption.     

The clinicopathological and immuohistochemical analysis of solid-pseudopapillary tumor of the pancreas： report of 9 cases

Objective：To investigate the clinical features, pathological characteristics and immunophenotype of solid-pseudopapillary tumor of the pancreas（SPTP）. Methods：Nine surgically treated cases of SPTP were retrospectively reviewed. Hematoxylin and Eosin（HE） staining and immunohistochemical staining were used to analyze all cases, and the general clinical data was collected. Results：Six patients were asymptomatic except for a palpable mass. Two patients complained of vague-epigastric pain. One patient appeared jaundice. The tumor was encapsulated and solid tissues alternately with cystic tissues. Histologically, the histological structure of solid portion was pseudopapillary with a fibrovascular core. Tumor cells were uniform and medium-sized which were arranged in sheets ets or nests or pseudopapillary patterns. Immunohistochemical studies demonstrated that SPTP proved positive in vimentin（9/9 cases）, AAT（9/9 cases）, NSE（9/9 cases）, ACT（7/9 cases）, CK20（2/9 cases）, CgA（1/9 cases）, S-100（3/gcases）, PR（4/gcases）, Syn（3/9 cases） and CD56（5/9cases）, negative in CEA and ER. Conclusion：SPTP is a tumor predominantly occurring in young women frequently without special symptoms. This tumor has various characteristical histological patterns with different immunophenotype.     

Dynamic Changes in Serum Estradiol and Progesterone levels in Patients of Premenstrual Syndrome with Adverse Flow of Liver-qi

Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.     

Real-time Three-dimensional Echocardiography in Assessment of Left Ventricular and Right Ventricular Volumes

Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.     

SCREENING FOR A 21-CHROMOSOME ABNORMALITY IN PREIMPLANTED EMBRYOS OF ELDERLY WOMEN

Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.