雌激素与内皮细胞凋亡的关系

目的 :观察雌激素 (17β 雌二醇 )对氧化型低密度脂蛋白 (oxLDL)诱导人脐静脉内皮细胞 (HUVEC)凋亡的影响。方法 :以HUVEC为对象 ,观察不同浓度的 17β 雌二醇 (1μmol/L、10 μmol/L和 10 0 μmol/L)对oxLDL(4 μg/L)诱导的凋亡的影响。结果 :不同剂量的 17β 雌二醇对使用oxLDL诱导的HUVEC凋亡减少 70 %～ 93% ,其抑制呈明显的正向量效关系 ,17β 雌二醇 1μmol/L组细胞凋亡占 6 .98%～ 8.6 3 % ,10 0 μmol/L组细胞凋亡占 2 .94%～ 4.85 %。结论 :17β 雌二醇对oxLDL诱导的HUVEC凋亡有明显的抑制作用 ,且在一定浓度范围内呈正向量效关系 ,有利于减少细胞凋亡的发生。     

米非司酮对子宫内膜癌细胞KLE和HHUA体外增殖和凋亡的研究

目的:探讨米非司酮(Mifepristone,MIF)对子宫内膜癌细胞系KLE和HHUA体外增殖、细胞周期和凋亡的影响。方法:KLE和HHUA在含不同浓度MIF(0、1×10-6、1×10-5、5×10-5、1×10-4mol/L)培养液中培养,应用MTT比色法、流式细胞术检测MIF对KLE和HHUA生长和细胞周期的影响,应用免疫组化SABC法检测肿瘤细胞ER、PR、Bcl-2和Bax的表达。结果:低浓度(≤10-6mol/L)MIF对KLE和HHUA细胞生长的抑制作用较弱,高浓度(5×10-5和1×10-4mol/L)MIF以时间-剂量依赖性方式显著抑制细胞生长。MIF阻滞细胞周期停滞于G1期,明显降低了S期细胞比例(P<0.05);MIF(≥10-5mol/L)显著降调ER、PR、Bcl-2表达,升调Bax表达,促进细胞凋亡。MIF对HHUA细胞的影响较KLE明显。结论:MIF通过阻滞细胞停滞于G1期和降低S期细胞比例,抑制KLE和HHUA细胞体外增殖;通过降调ER、PR、Bcl-2和升调Bax表达,促进KLE和HHUA细胞凋亡。     

丹参酮ⅡA对白血病细胞株K562增殖抑制及机制研究

目的 探讨丹参酮ⅡA(TAT)对人白血病细胞株K562的生长抑制作用及其可能机制。 方法 采用四甲基偶氮唑蓝(MTT)法检测TAT（终浓度1、10、15、30、50 μmol/L)对K562细胞的增殖抑制作用,光学显微镜观察TAT (30 μmol/L)作用24 h后K562细胞的形态变化,流式细胞术检测细胞凋亡率,Western blot法检测凋亡蛋白BCL-2、BAX的表达和蛋白激酶AKT/mTOR信号通路的变化。 结果 终浓度为10~50 μmol/L的TAT对K562细胞的生长具有抑制作用,与对照组比较差异具有统计学意义（P50）值为（7.75±2.47） μmol/L。30 μmol/L TAT作用K562细胞24 h后显微镜下显示细胞破坏明显,部分细胞裂解成碎片。流式细胞仪检测发现30 μmol/L TAT作用组凋亡细胞明显增多（P<0.05）。Western blot结果提示,30 μmol/L TAT作用K562细胞后AKT、mTOR、p70S6K、4-EBP1等信号通路关键点蛋白磷酸化表达水平减低,凋亡抑制蛋白BCL-2下调,而促凋亡蛋白BAX上调。 结论 TAT通过抑制AKT/m-TOR信号通路,下调BCL-2和上调BAX的表达,促进细胞凋亡,抑制白血病细胞株K562的生长。     

As2O3诱导人膀胱癌BIU-87细胞株凋亡及其对细胞周期的影响

目的:观察三氧化二砷(As2O3)对人膀胱癌BIU-87细胞株生长抑制作用,并探讨对细胞周期及凋亡的影响.方法:CellTiter 96 Aqueous One 试剂检测BIU-87细胞株增殖活力;荧光染色观察凋亡细胞的形态学变化;流式细胞术分析细胞周期及凋亡.结果:As2O3与BIU-87细胞株生长抑制率之间有明显的浓度依赖关系 (P<0.01),IC50为28.92 μmol/L;荧光显微镜下观察到经As2O3作用的BIU-87细胞核膜消失,核染色质呈大小不等的小圆形碎片;流式细胞术结果表明30 μmol/L的As2O3处理BIU-87细胞株48 h后,G0/G1期细胞比例下降,S期细胞比例增加,凋亡率为47.37%.结论:As2O3能显著抑制BIU-87细胞株增殖;使细胞阻滞在S期,并进一步诱导细胞凋亡.     

一种新型含硒化合物诱导PC-3前列腺癌细胞凋亡及其体内抑瘤作用的研究

目的　探讨新型含硒化合物BBSKE(1,2 [二 (1,2 苯并异硒唑 3(2H) 酮 ) ]乙烷 )对PC 3前列腺癌细胞的增殖及凋亡的影响 ,观察其对小鼠前列腺癌的体内抑瘤作用。方法　培养PC 3前列腺癌细胞 ,用MTT法检测了不同浓度的BBSKE对其增殖的影响 ,用荧光显微镜、DNA电泳和流式细胞仪观察BBSKE对细胞凋亡的诱导作用 ,并检测BBSKE对PC 3细胞bcl 2和bax蛋白表达水平及半胱氨蛋白水解酶 3活性的影响。用TRAMP C2小鼠前列腺癌细胞皮下注射C5 7BL/ 6小鼠 ,建立小鼠前列腺癌模型 ,观察BBSKE在小鼠体内的抗前列腺癌作用。结果　BBSKE可以显著抑制PC 3细胞的体外增殖 ,其 4 8h的IC50 值为 17 90 μmol/L ,而阳性对照组顺铂为 15 0 μmol/L。同时BBSKE可以诱导PC 3细胞凋亡 ,2 0 μmol/L的BBSKE作用PC 3细胞 4 8h凋亡发生率达 2 6 32 % ,显著高于未经处理的对照组的 1 75 % (P <0 0 1)。细胞中bcl 2表达减低 ,bax表达无明显变化 ,半胱氨蛋白水解酶 3活性显著增高。动物实验也表明其对小鼠体内前列腺癌的生长有抑制作用 ,抑瘤率达 4 0 % ,顺铂对照组为 4 8%。结论　新型含硒化合物BBSKE可以抑制PC 3细胞增殖并促进其凋亡 ,其作用可能是通过降低细胞内的bcl 2 ,增加半胱氨蛋白水解酶 3活性而实现的 ;在前列腺癌的动物模     

塞来昔布抑制人结肠癌细胞SW-1116增殖并诱导其凋亡

目的 :探讨塞来昔布 ,一个环氧合酶 2选择性抑制剂 ,诱导人结肠癌SW 1 1 1 6细胞凋亡 .方法 :应用体外噻唑兰法、吖啶橙荧光染色法、透射电镜技术、流式细胞术等方法研究塞来昔布抑制人结肠癌细胞SW 1 1 1 6的增殖及诱导其凋亡的作用 .结果 :塞来昔布抑制SW 1 1 1 6细胞的增殖且呈剂量依赖性 ,给药处理 72h其IC50 为 (33.6± 1 .78) μmol/L ;AO荧光染色及透射电镜观察发现 4 0 μmol/L的塞来昔布作用 2 4h后一些细胞形态出现了典型的凋亡特征 ;给药 2 5 ,5 0 ,1 0 0μmol/L 4 8h流式细胞术周期分析结果显示 ,各治疗组均出现凋亡峰 .结论 :塞来昔布抑制人结肠癌细胞株SW 1 1 1 6细胞的增殖并诱导其凋亡     

米非司酮对雄激素非依赖性前列腺癌LNCaPC_(4-2)和PC3细胞的作用机制

为探讨抗孕激素药米非司酮对雄激素非依赖性前列腺癌细胞株LNCaPC4 2 、PC3的促凋亡及生长抑制作用 ,将不同浓度的米非司酮加入到体外培养的 2株前列腺癌细胞中 ,分别在培养后 3d、5d、7d用SRB染色法检测细胞生长抑制率 ;用流式细胞仪检测加药后 2 4h、48hLNCaPC4 2 和PC3细胞凋亡情况。发现 :高浓度米非司酮 ( 2 0μmol/L)对雄激素非依赖性细胞株LNCaPC4 2 、PC3于 3d、5d、7d的细胞生长抑制率分别为 5 5 .79%、66.3 7%、71 .5 4%和 87.42 %、98.1 5 %、1 0 0 %。不同浓度米非司酮即 2 .5、5、1 0、1 5、2 0 μmol/L对LNCaPC4 2 、PC3细胞株 7d时的细胞生长抑制率分别为 1 7.0 7%、3 5 .77%、5 3 .66%、63 .41 %、71 .5 4%和 48.2 5 %、63 .42 %、82 .3 7%、95 .3 1 %、1 0 0 %。前列腺癌细胞株LNCaPC4 2 受 1 5 μmol/L米非司酮作用 2 4h和 48h细胞凋亡率分别为 1 9.3 0 %、3 0 .0 4% ;PC3受米非司酮 1 5 μmol/L作用 2 4h细胞凋亡率为 44.5 2 %。提示 :米非司酮对LNCaPC4 2 、PC3细胞株有时间和剂量依赖的生长抑制作用 ,其生长抑制作用是通过促进细胞凋亡实现的。     

氟在体外对成骨细胞增殖能力及细胞周期的影响

目的 :建立成骨细胞体外培养模型 ,并观察不同浓度的氟对成骨细胞的影响 ,为氟中毒的机制研究提供实验依据。方法 :用幼兔肋骨培养成骨细胞 ,并纯化、鉴定。用不同浓度的氟化钠处理 (2 0 ,16 0 ,2 4 0 ,4 0 0μmol/L)成骨细胞 ,MTT法测定氟对成骨细胞增殖活性的影响 ;流式细胞术测定细胞周期变化及凋亡情况。 结果 :低浓度的氟化钠 (2 0 μmol/L)在体外可显著促进成骨细胞增殖 (P <0 0 1) ,不引起成骨细胞的凋亡 ,可使S期和G2 /M期的细胞明显增多 ;高浓度的氟化钠 (16 0 ,2 4 0 ,4 0 0 μmol/L)则抑制成骨细胞的增殖 (P <0 0 1) ,引起成骨细胞的凋亡 (P <0 0 1和P <0 0 5 ) ,G2 /M期细胞明显减少。结论 :(1)成功建立了氟中毒的体外细胞模型 ;(2 )低浓度的氟化钠可以促进成骨细胞的增殖。高浓度的氟化钠抑制成骨细胞的增殖 ,诱导细胞的凋亡 ,抑制细胞由S期向G2 /M期转化。氟对成骨细胞的作用具有双向性     

选择性环氧合酶抑制剂ｃｅｌｅｃｏｘｉｂ对血管平滑肌细胞的增殖抑制、凋亡诱导作用和分子机制

目的:探讨环氧合酶-2(COX-2)选择性抑制剂塞莱昔布(celecoxib)对血管平滑肌细胞的增殖抑制作用及分子机制.方法:给予原代培养的大鼠平滑肌细胞不同浓度的celecoxib处理,WST-1细胞增殖实验观察细胞的生长抑制作用;流式细胞术检测凋亡;Western blot方法检测血管平滑肌细胞COX-2的表达、caspase-3蛋白的裂解激活、磷酸化Akt的表达.结果:WST-1实验结果显示.经0、6.25、12.50、25.00、50.00 μmol/Lcelecoxib作用24 h后,细胞的增殖率分别为100%、81.15%、66.72%、54.93%和11.41%:50 μmol/L celecoxib作用24 h后,流式细胞仪检测细胞凋亡率为30.72%;Western blot实验显示,血管平滑肌细胞中COX-2有表达,celecoxib作用于细胞后caspase-3蛋白裂解片段激活,磷酸化Akt的表达减弱或消失.结论:celecoxib对血管平滑肌细胞有增殖抑制和凋亡诱导作用,其机制可能部分涉及到Akt/caspase途径.     

MPP+对PC12细胞体外生长增殖的毒性作用

目的: 研究不同剂量1-甲基-4苯基-吡啶离子(MPP )对大鼠嗜铬细胞瘤PC12细胞生长增殖的抑制作用,探讨MPP 多巴胺能神经毒性机制. 方法: PC12细胞体外培养,以100～700 μmol/L MPP 进行染毒. MTT法测算MPP 作用1～7 d对PC12细胞的抑制情况并绘制生长曲线;取4 d为作用时间,细胞计数法观察MPP 对细胞的抑制率;透射电镜观察细胞形态学变化,流式细胞仪检测细胞凋亡率及细胞周期改变情况. 结果: 细胞生长曲线的改变证实MPP 对PC12细胞的生长增殖有显著抑制作用,而且呈时间-剂量-效应关系. 细胞生长抑制试验结果显示100～700 μmol/L MPP 对细胞的抑制率为0.22～0.66 (P<0.01);透射电镜观察发现MPP 可诱导PC12细胞发生凋亡的形态学改变,同时伴有线粒体肿胀;流式细胞仪检测显示100, 300 μmol/L MPP 作用后,细胞总凋亡率比对照组分别增加0.51和0.62 (P<0.01). 结论: MPP 对PC12细胞的生长增殖有明显的抑制作用,而诱导细胞凋亡可能是MPP 产生多巴胺能神经毒性的重要机制之一.     

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.     

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.     

Scientific principles and rigorous processes should be followed in developing clinical guidelines for therapeutic interventions of integrative medicine

A clinical guideline for the therapeutic interventions of integrative medicine may be defined as a written document which states a series of recommendations on therapeutic interventions of integrative medicine for a special disease or condition. The guideline may provide assistance to medical professionals in making clinical decisions aimed at improving the clinical outcome of patients and reducing the costs of medical care（~＇4~. Recommendations issued by a guideline should be based on the best available evidence in both Western and Chinese medicine. For fulfilling this purpose, the development of clinical guidelines for therapeutic interventions in the field of integrative medicine should follow scientific principles and undergo a rigorous processes.