Bcl-2家族成员在紫杉醇诱导胃腺癌细胞凋亡中的表达

目的研究Bcl-2家族成员在紫杉醇诱导胃腺癌细胞凋亡中的表达，探索紫杉醇作用的分子机制。方法流式细胞仪PI单染法检测细胞凋亡率；Western blotting检测紫杉醇诱导胃腺癌细胞凋亡过程中Bcl-2家族成员的表达水平变化。结果紫杉醇诱导胃腺癌细胞凋亡具有剂量和时间依赖性，SGC-7901较BGC-823胃腺癌细胞株对紫杉醇更为敏感。紫杉醇诱导胃腺癌细胞凋亡中，Bcl-2家族成员中促凋亡分子Bim表达水平增高，而抗凋亡分子Bcl-2、Bcl—xL表达降低。结论Bcl-2家族成员在紫杉醇诱导胃腺癌细胞凋亡中发挥重要的调节作用。     

鸦胆子油乳抗人胃腺癌增殖作用的初步研究

目的 研究鸦胆子油乳对人胃腺癌细胞的增殖抑制作用。方法 采用体外药物敏感试验和流式细胞仪技术检测鸦胆子油乳对SGC－7901细胞增殖周期影响及诱导凋亡作用。结果 鸦胆子油乳体外具有明显的抑制SGC－7901增殖的作用。与对照组相比,鸦胆子油乳2μg/ml分别孵育SGC-7901细胞24h和36h后,细胞周期被阻滞于DNA合成期（S期）。流式细胞仪检测未见明显的亚二倍体峰,鸦胆子油 同浓度、不同孵育时间诱导细胞凋亡的作用无显著差异（P＞0.05）。结论 鸦胆子油乳在体外能有效抑制SGC－7901细胞的增殖,初步研究表明其主要通过阻滞细胞周期于S期而不是通过诱导凋亡来抑制SGC－7901细胞的增殖。     

BH3-only蛋白在紫杉醇诱导胃腺癌细胞凋亡中的表达

目的研究BH3-only蛋白Bim、Nora、Puma在紫杉醇诱导胃腺癌细胞凋亡中的表达水平及其意义。方法流式细胞仪Annexin Ⅴ／PI双染法检测细胞凋亡率;半定量RT-PCR和Western blot分别检测在紫杉醇诱导前后Bim、Noxa、Puma的mRNA和蛋白的表达水平。结果紫杉醇诱导胃腺癌细胞凋亡具有剂量和时间依赖性,SGC-7901胃腺癌细胞比BGC-823细胞对紫杉醇更具敏感性。Bim的mRNA和蛋白的表达水平在紫杉醇诱导的SGC-7901中有显著升高,而在BGC-823中无明显变化。Noxa的mRNA表达水平在紫杉醇诱导的SGC-7901及BGC-823中有一过性升高,而其蛋白表达水平却检测不到。两种胃腺癌细胞系均未检测到Puma mRNA的表达。结论紫杉醇能通过诱导细胞凋亡杀伤胃腺癌细胞,而此凋亡可能与BH3-only蛋白Bim、Noxa的表达上调有关,而与Puma mRNA的表达无关。     

紫杉醇体外诱导人胃癌细胞凋亡及对端粒酶活性的影响

目的 研究紫杉醇对人胃癌细胞诱导凋亡作用及端粒酶活性变化。方法 0．001－1μmol/L的紫杉醇处理SGC7901细胞后,用MTT法测定胃癌细胞的生长抑制率,通过形态学观察及流式细胞术检测细胞凋亡率,半定量TRAP－银染法测定端粒酶活性变化。结果 不同浓度的紫杉醇对胃癌细胞均有明显抑制作用,且呈时间依赖性及剂量依赖性,光镜及流式细胞术分析表明,0．01μmol/L的紫杉醇处理后24h,细胞即出现明显的凋亡形态特征及凋亡峰,对端粒酶活性的同步检测结果显示,紫杉醇在诱导细胞凋亡的同时伴随端粒酶活性下调,且随紫杉醇浓度增大,抑制作用逐渐增强,24h酶活性即显著受抑制,72h变为阴性。结论 紫杉醇对胃癌细胞具有明显抑制作用,诱导细胞凋亡并抑制端粒酶活性可能是其发挥抗癌作用的机制之一,端粒酶可作为肿瘤化疗的敏感性指标。     

siRNA特异性"沉默"Bim基因对胃腺癌细胞凋亡的影响

目的研究BH3-only蛋白Bim在紫杉醇诱导胃腺癌细胞凋亡中的作用。方法流式细胞仪PI单染法检测细胞凋亡率;JC-1染色检测线粒体膜电位的变化;在紫杉醇相对敏感SGC-7901胃腺癌细胞株中采用小干扰RNA(siRNA)技术特异性"沉默"Bim基因;Western blot分别检测紫杉醇诱导siRNA"沉默"Bim基因前后Bim蛋白的表达水平变化。结果紫杉醇诱导胃腺癌细胞凋亡具有剂量和时间依赖性,SGC-7901较BGC-823胃腺癌细胞株对紫杉醇更为敏感。紫杉醇诱导SGC-7901及BGC-823胃腺癌细胞很大程度依赖线粒体途径凋亡。特异性"沉默"Bim基因的转录,紫杉醇诱导凋亡敏感细胞株SGC-7901的凋亡率明显降低。结论Bim在紫杉醇诱导胃腺癌细胞凋亡中发挥关键调节作用。     

白藜芦醇对胃腺癌细胞株增殖和凋亡的影响

目的:研究白藜芦醇对胃癌细胞株增殖和凋亡的影响?方法:不同浓度白藜芦醇(0~150 μmol/L)作用人胃腺癌细胞株BGC823(低分化)和SGC7901(中分化),CCK-8试剂盒检测细胞增殖,流式细胞仪检测细胞凋亡,免疫印迹检测凋亡相关蛋白survivin的表达?结果:白藜芦醇对胃癌细胞株增殖能力呈时间和浓度依赖性抑制,150 μmol/L白藜芦醇作用人胃癌细胞株BGC823和SGC7901 72 h后,早期和晚期凋亡细胞比率均明显增加,而survivin蛋白表达均明显下降(P < 0.05)?结论:白藜芦醇以浓度和时间依赖性模式抑制胃癌细胞的增殖能力和活性,诱导胃癌细胞株BGC823和SGC7901发生凋亡,其机制可能与下调survivin蛋白的表达有关?     

盐酸小檗碱抑制人胃癌细胞与诱导凋亡的实验研究

目的：探讨盐酸小檗碱体外对人胃癌细胞的抑制与诱导凋亡的影响。方法：以人胃腺癌细胞株SGC-7901为实验模型，用盐酸小檗碱大(8μg／ml)、小(4μg／ml)两个剂量组进行干预，采用四甲基偶氮唑蓝(MTT)比色法，光镜、扫描电镜、流式细胞术方法对细胞抑制、凋亡进行定性、定量检测，并设对照组对比。结果：不同浓度的盐酸小檗碱作用不同时间后，均对SGC-7901细胞产生抑制作用，且药物浓度越高、作用时间越长，抑制作用越强。扫描电镜下观测到细胞固缩，微绒毛消失，细胞间连接稀疏，凋亡小体形成。凋亡细胞发生率与药物浓度呈正相关。结论：盐酸小檗碱对人胃癌细胞生长具有明显抑制作用，并能显著诱导凋亡，这可能为该药抗胃癌作用的重要机理。     

阿魏酸乙酯对胃癌 SGC －7901细胞增殖及凋亡的影响

目的：探讨阿魏酸乙酯（EF）对胃癌 SGC －7901细胞增殖及凋亡的影响。方法体外培养人胃癌SGC －7901细胞,采用不同浓度的 EF 作用 SGC －7901细胞,设置5个复孔,作用24、36、48 h,MTT 法检测细胞的增殖情况;用0和40μg／mL EF 分别作用 SGC －7901细胞24 h,DAPI 染色法观察 SGC －7901细胞形态学变化;另外,采用不同浓度的 EF 作用 SGC －7901细胞24、36和48 h,Annexin V －FITC／PI 法和流式细胞仪检测细胞凋亡情况。结果40、80、120、160和200μg／mL 浓度的 EF 分别作用 SGC －7901细胞24、36及48 h,其对 SGC －7901细胞的 IC50分别为158.86、142.48和128.07μg／mL;40μg／mL 的 EF 作用 SGC －7901细胞12 h,经 DAPI 染色,SGC －7901细胞的细胞核固缩,出现凋亡小体;经 Annexin V －FITC／PI 法检测,EF 对 SGC －7901细胞的凋亡有明显的诱导作用,并且随着 EF 作用浓度和时间的增加,凋亡率增加。结论EF 能有效抑制 SGC －7901细胞增殖,并能诱导 SGC －7901细胞凋亡,两种作用均呈浓度和时间依赖性。     

高表达Mcl-1对衣霉素诱导胃腺癌细胞凋亡的影响

目的 探讨Bcl-2蛋白家族中Mcl-1在衣霉素诱导胃腺癌细胞内质网应激性凋亡中的作用.方法 采用流式细胞仪PI单染法检测细胞凋亡率;Western blot检测Bcl-2、Mcl-1、Bcl-XL在衣霉素诱导胃腺癌细胞内质网应激状态下的表达;脂质体LipofectamineTM2000转染pcDNA3.0/Mcl-1质粒;Western blot分别检测转染前后Mcl-1蛋白的表达水平变化.结果 衣霉素诱导胃腺癌细胞凋亡具有剂量和时间依赖性,但两株细胞对衣霉素诱导的凋亡都不敏感,其中SGC-7901较BGC-823对衣霉素的耐受表现更明显.由于衣霉素诱导SGC-7901和BGC-823的凋亡与线粒体凋亡途径有关,检测Bcl-2蛋白家族Mcl-1在SGC-7901中有明显上调.通过转染质粒高表达Mcl-1蛋白,衣霉素诱导的凋亡有明显下降.结论 Mcl-1在衣霉素诱导胃腺癌细胞凋亡中发挥重要的抑制作用.     

亚硒酸钠溶液诱导胃上皮肿瘤SGC-7901细胞凋亡的实验研究

目的：探讨亚硒酸钠能否诱导胃上皮肿瘤SGC 7901细胞凋亡，以及凋亡诱导与细胞周期改变的关系。方法：亚硒酸钠溶液不同浓度、不同作用时间分别处理SGC 7901细胞，应用电子显微镜观察亚硒酸钠溶液作用后细胞形态变化，应用DNA末端原位标记染色法 (TUNEL)及流式细胞仪技术分析细胞凋亡及细胞周期的改变。结果：亚硒酸钠作用于SGC 7901细胞后，可看到较为典型的细胞凋亡的形态学变化：细胞核固缩、染色质凝集、呈新月型紧贴于核膜周边，核碎裂，染色质片段化，凋亡小体形成等。流式细胞仪DNA直方图上出现典型的亚二倍体的“凋亡峰”。TUNEL染色法细胞凋亡指数在8.4％～33.4％。结论：亚硒酸钠能够诱导SGC 7901细胞凋亡，亚硒酸钠诱导SGC 7901细胞凋亡与细胞周期阻滞密切相关。     

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.