苦参碱体外对胃癌细胞的杀伤作用

目的研究苦参碱对不同分化程度的胃癌细胞株在体外的杀伤作用及其机制.方法用不同剂量的苦参碱分别作用于中、低分化胃癌细胞株SGC-7901和AGS 24、48、72 h,以MTT法检测药物对肿瘤细胞的杀伤作用;透射电镜和流式细胞术检测苦参碱诱导SGC-7901凋亡的作用.结果随药物浓度的增加和作用时间的延长,苦参碱对胃癌细胞的杀伤作用逐渐增强(P＜0.01);低分化的AGS较中分化的SGC-7901更为敏感.透射电镜、流式细胞术检测均显示苦参碱能够诱导胃癌细胞凋亡.结论苦参碱在体外对胃癌细胞具有杀伤作用,且呈明显的量效和时效关系;低分化的胃癌细胞株AGS对苦参碱更为敏感;苦参碱对胃癌细胞株的体外杀伤作用与其诱导胃癌细胞凋亡有关.     

积雪草苷抗人胃癌细胞株SGC-7901作用的研究

目的:观察积雪草苷对人胃癌细胞株SGC-7901的作用;初步探讨积雪草作用于胃癌SGC-7901细胞的机制。方法:采用MTT法观察积雪草对胃癌细胞增值抑制的作用,流式细胞术检测积雪草苷对胃癌细胞凋亡的诱导作用,透射电镜观察SGC-7901凋亡细胞的超微结构。结果:积雪草苷作用的胃癌细胞增值被抑制;促进了胃癌细胞株SGC-7901的凋亡,并存在量效关系。透射电镜观察显示胞质浓缩,核固缩,并可见凋亡小体。结论:积雪草苷可抑制人胃癌细胞SGC-7901的增值并诱导其凋亡。     

苦参素对胃癌SGC-7901细胞凋亡及细胞骨架改变的研究

目的 探讨苦参素对胃癌细胞株SGC-7901的抑制增殖效应及凋亡诱导作用。方法 用苦参素处理SGC-7901细胞,采用MTT法检测苦参素对细胞的抑制作用,透射电镜观察微丝的变化,流式细胞术检测细胞凋亡率和细胞周期。结果 苦参素使SGC-7901细胞呈凋亡改变,细胞的活力下降,微丝几近消失,不同浓度的苦参素均可导致细胞凋亡和细胞周期阻抑。结论 苦参素能抑制胃癌细胞增殖,能诱导胃癌细胞凋亡。     

苦参素诱导胃癌SGC-7901细胞凋亡的研究

目的 探讨苦参素对胃癌细胞株SGC-7901的抑制增殖效应及凋亡诱导作用.方法 用苦参素处理SGC-7901细胞,采用MTT法检测苦参素对细胞的抑制作用,透射电镜观察微丝的变化,流式细胞术检测细胞凋亡率和细胞周期.结果 在苦参素作用下,SGC-7901细胞呈凋亡改变.细胞凋亡的同时,细胞的活力下降,微丝几近消失,不同浓度的苦参素均可导致细胞凋亡和细胞周期阻抑.结论 苦参素能抑制胃癌细胞增殖,能诱导胃癌细胞凋亡.     

姜黄素对胃癌细胞放疗增敏作用的研究

目的:探讨姜黄素对胃癌细胞株SGC-7901放疗敏感性的影响。方法:以人胃癌细胞株SGC-7901为研究对象,所有实验均重复3次,取其均值为最终结果。将细胞随机分成空白对照组、单纯药物组、单纯照射组、姜黄素加照射组,MTT法检测姜黄素药物毒性;流式细胞仪检测姜黄素对胃癌细胞株SGC-7901的凋亡率和细胞周期分布的影响。结果:姜黄素能够抑制胃癌细胞株SGC-7901的增殖,这种作用具有明显的量效关系;姜黄素能够诱导胃癌细胞株SGC-7901的凋亡,且随着药物浓度的增加,凋亡率升高;单纯药物组和姜黄素加照射组G2/M期细胞的比例明显升高。结论:低剂量姜黄素可显著提高胃癌细胞株SGC-7901的放疗敏感性,其作用机制可能与周期阻滞及其凋亡诱导效应相关。     

幽门螺杆菌诱导胃癌细胞凋亡与p53状态和bax、caspase表达的关系

目的 探讨幽门螺杆菌(HP)体外诱导胃癌细胞凋亡与p53状态和bax、caspase表达的关系.方法 流式细胞术检测HP国际标准菌株NCTC 11637诱导SGC-7901和AGS细胞凋亡,检测NCTC 11637对SGC-7901和AGS的bax、caspasemRNA和蛋白表达的影响.结果 HP能够在体外直接诱导SGC-7901和AGS细胞凋亡,SGC-7901细胞发生凋亡的高峰时间出现在12～24h,AGS细胞的凋亡率则随着HP感染时间的延长而增高.HP能够呈时间依赖性地上调SGC-7901和AGS细胞的Bax mRNA和蛋白表达,并促进caspase-9和caspase-3的激活.结论 幽门螺杆菌可以通过线粒体途径直接诱导胃癌细胞凋亡,而且野生型p53具有放大线粒体凋亡途径的作用.     

蒿甲醚对胃癌细胞和胰腺癌细胞的体外杀伤作用

目的观察蒿甲醚(ART)在体外对胃癌细胞株和胰腺癌细胞株的杀伤作用以及对细胞增殖和细胞凋亡的影响。方法选择人胃癌细胞株SGC-7901和MKN-45及胰腺癌细胞株SW-1990和BXPC-3,采用MTT法检测不同浓度ART对不同肿瘤细胞的抑制作用;应用流式细胞仪检测ART对肿瘤细胞细胞周期和细胞凋亡的影响。结果MTT结果显示ART对各株肿瘤细胞均具有显著的杀伤作用(P<0.05),且其细胞毒作用与时间-剂量呈正相关(P<0.05);流式细胞仪检测显示,ART使各株肿瘤细胞阻滞于G0/G1期,并诱导细胞凋亡。结论ART在体外对SGC-7901、MKN-45、SW-1990、BXPC-3细胞株有明显的细胞毒作用,且具有时间-剂量效应关系;其抑制作用与阻滞细胞周期和诱导肿瘤细胞凋亡有关。     

蒿甲醚对胃癌细胞和胰腺癌细胞的体外杀伤作用

目的 观察蒿甲醚(ART)在体外对胃癌细胞株和胰腺癌细胞株的杀伤作用以及对细胞增殖和细胞凋亡的影响.方法 选择人胃癌细胞株SGC-7901和MKN-45及胰腺癌细胞株SW-1990和BXPC-3,采用MTT法检测不同浓度ART对不同肿瘤细胞的抑制作用;应用流式细胞仪检测ART对肿瘤细胞细胞周期和细胞凋亡的影响.结果 MTT结果显示ART对各株肿瘤细胞均具有显著的杀伤作用(P<0.05),且其细胞毒作用与时间-剂量呈正相关(P<0.05);流式细胞仪检测显示,ART使各株肿瘤细胞阻滞于G0/G1期,并诱导细胞凋亡.结论 ART在体外对SGC-7901、MKN-45、SW-1990、BXPC-3细胞株有明显的细胞毒作用,且具有时间-剂量效应关系;其抑制作用与阻滞细胞周期和诱导肿瘤细胞凋亡有关.     

β-咔啉类生物碱对人胃癌SGC-7901细胞凋亡及PTEN、ERK mRNA表达的影响

目的探讨β-咔啉类生物碱对体外培养的人胃癌细胞株SGC-7901细胞的凋亡作用及PTEN、ERK m RNA表达的影响。方法体外培养人胃癌SGC-7901细胞,用CCK-8法测定不同浓度、不同时间β-咔啉类生物碱对胃癌细胞株的生长抑制率;用流式细胞技术检测细胞的凋亡;RT-PCR法检测PTEN、ERK m RNA表达的变化。结果β-咔啉类生物碱体外能抑制人胃癌细胞株SGC-7901细胞的增殖,促进了人胃癌SGC-7901细胞凋亡。不同浓度的对β-咔啉类生物碱作用于人胃癌SGC-7901细胞24、48 h后,PTEN m RNA的表达增高,ERK m RNA的表达减少,且呈剂量时间依赖性(P<0.05)。结论人胃癌SGC-7901细胞对β-咔啉类生物碱具有药物敏感性,β-咔啉类生物碱能诱导体外培养的胃癌细胞凋亡,其作用机制可能与β-咔啉类生物碱诱导胃癌细胞中PTEN-m RNA的表达增高和ERK m RNA的表达减少有关。     

大豆异黄酮诱导人胃癌细胞株SGC-7901凋亡的研究

目的:探讨大豆异黄酮对体外培养的人胃癌细胞SGC-7901生长的抑制和诱导细胞凋亡的作用.方法:用MTT法检测药物效应,透射电镜及流式细胞仪观察大豆异黄酮处理SGC-7901细胞后细胞周期和细胞凋亡.结果:(1)MTT法证实大豆异黄酮对SGC-7901细胞生长有抑制作用,并呈剂量-效应关系.(2)流式细胞仪分析大豆异黄酮处理SGC-7901细胞后细胞滞留于G2/M期,并可见凋亡峰.(3)透射电镜可见SGC-7901细胞出现典型的凋亡细胞形态学改变.结论:大豆异黄酮对人胃癌细胞SGC-7901有抑制作用,抑制作用与诱导胃癌细胞凋亡、阻抑细胞周期进程有关,诱导胃癌细胞凋亡、阻抑细胞周期进程是大豆异黄酮抗胃癌作用的机制之一.     

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.     

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.