链霉菌C-1027抑制肝癌细胞的作用研究

目的 研究链霉菌C-1027对肝癌BEL-7402细胞的抗肿瘤作用,并探究其对BEL-7402细胞自噬的影响.方法 采用MTT法检测C-1027对BEL-7402细胞活力的影响,台盼蓝排斥实验检测C-1027对BEL-7402细胞存活率的影响,克隆形成实验评价C-1027对BEL-7402细胞增殖的作用,AO染色检测自...     

苦参碱对结肠癌耐药细胞化疗药物敏感性及自噬水平的影响

目的探讨苦参碱对结肠癌耐药细胞化疗药物敏感性及自噬水平的影响。方法分别采用浓度为0.5mg/ml、1 mg/ml、2 mg/ml、4 mg/ml、8 mg/ml苦参碱作用于结肠癌细胞HCT-8/VCR,分别在24 h、48 h,采用CCK-8法检测苦参碱对结肠癌细胞HCT-8及其耐药细胞HCT-8/VCR的抑制作用,并计算出抑制率;运用Western Blotting检测自噬相关基因P62、Beclin-1、LC3蛋白表达。采用流式细胞术检测苦参碱作用耐药细胞后的细胞凋亡率。结果在苦参碱作用24 h和48 h后,HCT-8细胞增殖的抑制作用随着苦参碱浓度的增加而增强,苦参碱对HCT-8细胞增殖的抑制作用呈浓度依赖性,差异有统计学意义(P<0.001)。对各组细胞的凋亡率检测发现,采用苦参碱的实验组的细胞凋亡率大大高于对照组,差异有统计学意义(P<0.001)。在苦参碱应用24 h后,HCT-8/VCR细胞质中出现了自噬泡。Western Blotting检测显示随着苦参碱浓度的增加,P62、Beclin-1、LC3蛋白的表达水平也随之增强。结论苦参碱能够提高结肠癌耐药细胞的自噬水平,逆转结肠癌耐药细胞HCT-8/VCR的多药耐药性,诱导细胞凋亡,抑制细胞增殖。     

绿脓杆菌制剂对人肝癌细胞株BEL-7402的杀伤效应

目的探索绿脓杆菌制剂对人肝癌细胞BEL-7402的杀伤效应。方法采用MTT法检测不同浓度的绿脓杆菌制剂对人肝癌细胞BEL-7402增殖的作用,同时利用电子显微镜、透射电镜观察细胞BEL-7402的形态学变化。结果MTT检测表明：绿脓杆菌制剂为10×107/mL、5×107/mL、2.5×107/mL时对肝癌细胞生长杀伤作用与对照组比较差异有高度统计学意义（P〈0.01）;电子显微镜、透射电镜观察发现肝癌细胞BEL-7402于12、24 h出现凋亡形态学改变,40 h形态学表现为凋亡与坏死并存。结论绿脓杆菌制剂对肝癌细胞BEL-7402生长有抑制作用,诱导细胞凋亡及坏死可能是主要作用机制。     

肝力注射液逆转人肝癌细胞获得性多药耐药的体外研究

目的研究肝力注射液体外逆转人肝癌细胞5-Fu获得性多药耐药的作用。方法MTT法检测肝力注射液对人肝癌BEL-7402/5-Fu耐药细胞株的增殖抑制率及对5-Fu获得性多药耐药的逆转指数,倒置显微镜及Wright-Giemsa染色观察细胞形态学改变,流式细胞术检测细胞内阿霉素荧光强度。结果人肝癌BEL-7402/5-Fu细胞株对临床常用化疗药物显示出不同程度的交叉抗药性,肝力注射液(以苦参碱计)在0.230、0.115、0.058mg/mL3个质量浓度对人肝癌BEL-7402耐药细胞株72h的增殖抑制率分别为(9.25±2.38)%、(8.46±1.90)%、(4.23±2.05)%,对5-Fu的逆转指数分别为5.50、3.83、2.25,肝力注射液在0.230mg/mL质量浓度预处理细胞2h能提高细胞内阿霉素的量约38.61%。结论肝力注射液在体外具有逆转人肝癌细胞5-Fu获得性多药耐药的作用。     

亚砷酸对人肝癌细胞凋亡及ERK-1蛋白表达的影响

目的探讨亚砷酸对人肝癌细胞BEL-7402凋亡及ERK-1蛋白表达的影响.方法通过体外细胞培养,用流式细胞术观察BEL-7402细胞周期及凋亡率变化;HE染色法、荧光显微镜观察细胞的凋亡形态变化;并用免疫组化法检测细胞ERK-1蛋白的表达.结果亚砷酸(1.0～8.0 μmol/L)能诱导BEL-7402细胞凋亡并阻滞细胞周期于S、G2/M期,呈剂量依赖性;亚砷酸(8.0 μmol/L)作用BEL-7402细胞48 h后, HE染色、荧光显微镜观察可见BEL-7402细胞呈现明显的凋亡形态改变;免疫组化法检测发现8.0 μmol/L的亚砷酸作用48 h 后BEL-7402细胞的ERK-1蛋白表达明显减弱. 结论亚砷酸体外有诱导人肝癌细胞凋亡及降低ERK-1蛋白表达的作用.     

新藤黄酸抑制人肝癌细胞BEL-7402自噬作用研究

目的 观察新藤黄酸（gambogenic acid,GNA）对人肝癌细胞BEL-7402自噬的影响,为GNA抗肿瘤研究提供理论依据。方法 体外培养人肝癌BEL-7402细胞株,采用MTT法检测GNA对人肝癌细胞BEL-7402存活率的影响;倒置显微镜观察给药前后细胞形态变化;单丹磺酰尸胺（monodansylcadaverine,MDC）染色,荧光显微镜观察细胞自噬小体;透射电子显微镜进一步观察自噬小体;Western blot法检测自噬相关蛋白微管相关蛋白1轻链3（microtubule associated protein 1 light chain 3,LC3）和p62、Beclin1的表达水平及加入自噬诱导剂雷帕霉素（rapamycin,Rap）和自噬抑制剂氯喹（chloroquine,CQ）后自噬相关蛋白的表达情况。结果 GNA能显著抑制人肝癌细胞BEL-7402的增殖并呈时效及量效关系;倒置显微镜观察结果显示GNA组细胞随药物浓度增大,细胞悬浮增多,高浓度给药组细胞出现碎片化;荧光显微镜下观察结果显示,随药物浓度的增加,荧光点状聚集增多;透射电子显微镜观察发现,随GNA浓度的增加,细胞内自噬空泡数量增多,与对照组比较,加入自噬诱导剂Rap后,自噬空泡数量显著增多;Western blot法检测结果显示,随GNA浓度的增加,Beclin1、p62、LC3-Ⅱ蛋白表达水平均增加（P<0.05）,LC3-Ⅰ无明显变化,表明BEL-7402细胞自噬前期被激活,后期进程被抑制。结论 GNA能抑制人肝癌细胞BEL-7402的增殖,其机制可能部分是通过抑制自噬后期自噬体与溶酶体的融合,抑制人肝癌BEL-7402细胞的保护性自噬。     

姜黄素诱导人胃癌SGC7901细胞自噬性凋亡的研究

目的 观察姜黄素体外诱导人胃癌SGC7901细胞自噬性凋亡的作用,并探讨其可能的作用机制.方法 用不同浓度的姜黄素处理SGC7901细胞,MTT法检测细胞增殖;单丹磺酰尸胺(monodansylcadaverin,MDC)荧光染色和Hoechst33342荧光染色观察细胞自噬和凋亡的发生;流式细胞术检测细胞凋亡率;Western blot检测细胞凋亡相关蛋白NF-κB、自噬相关蛋白Beclin1及LC3Ⅱ的表达.结果 姜黄素可呈剂量依赖性明显抑制SGC7901的生长.MDC染色显示,40μmol/L姜黄素在作用12h后即可诱导SGC7901细胞发生自噬,24 h自噬减少;Hoechst33342荧光染色显示,40μmol/L姜黄素诱导凋亡在24 h最明显;流式细胞术显示,40μmol/L姜黄素作用24h时SGC7901细胞凋亡率明显增加.Western blot检测显示,姜黄素诱导SGC7901细胞自噬性凋亡过程中,凋亡相关蛋白NF-κB、自噬相关蛋白Beclin1及LC3的表达均上调.结论 姜黄素通过诱导自噬性凋亡抑制人胃癌细胞SGC7901的生长,其机制与NF-κB、Beclin1及LC3蛋白的表达上调有关.     

苦参碱诱导肝癌HepG2细胞自噬的作用与机制

目的探讨苦参碱对肝癌HepG2细胞自噬的作用,进一步研究苦参碱诱导HepG2细胞自噬的机制。方法将0.0（对照组）、0.4、0.8、1.6g·L-1苦参碱及0.4g·L-1苦参碱+10mmol·L-1自噬特异抑制剂（3-MA）分别作用于肝癌HepG2细胞,构建体外模型。采用免疫印迹法（Western blotting）检测自噬基因LC3-Ⅱ的表达,实时荧光定量PCR（Realtime-PCR）检测自噬基因WIPI1的表达,Annexin V FITC-PI流式细胞术检测HepG2细胞凋亡率,电镜观察HepG2细胞自噬体变化与凋亡情况。结果 0.4、0.8、1.6g·L-1苦参碱作用的HepG2细胞LC3-Ⅱ表达相比对照组均显著增加（P<0.05）,其中0.4g·L-1苦参碱作用的HepG2细胞LC3-Ⅱ表达水平最高;0.4g·L-1苦参碱作用的HepG2细胞自噬体、WIPI1mRNA表达水平较对照组明显增加（P<0.05）。0.4g·L-1苦参碱联合3-MA作用的HepG2细胞凋亡率较单纯0.4g·L-1苦参碱作用的凋亡率显著增加（P<0.05）。结论苦参碱诱导HepG2自噬且减少细胞凋亡,与WIPI1的表达相关。自噬抑制剂可抑制苦参碱诱导的自噬,促进肝癌细胞凋亡,二者联合可成为临床治疗肝癌的新措施。     

奥曲肽对人肝癌BEL-7402细胞生长调控的实验研究

目的 观察生长抑素类似物奥曲肽(OCT)对人肝癌BEL-7402细胞生长调控的影响.方法 培养人肝癌细胞株BEL-7402至对数生长期.MTT比色分析法测定OCT对BEL-7402细胞增殖的影响;流式细胞术分析OCT在10～6mol/L时对BEL-7402细胞周期和凋亡的影响;HE染色观察10-6mol/L OCT作用后BEL-7402细胞形态学改变.结果 1)OCT在一定浓度范围内呈剂量依赖性方式抑制肝癌BEL-7402细胞的生长;2)BEL-7402细胞经10-6mol/L OCT作用后细胞周期发生明显改变.3)10-6mol/L OCT作用后BEL-7402细胞形态学发生明显改变.结论 OCT在抑制肝癌细胞增殖,促进凋亡中起着重要的作用.     

饥饿诱导DRAM介导的自噬与HepG2和Hep3B细胞凋亡的关系

目的探讨饥饿诱导损伤调节自噬调控基因(DRAM)介导的自噬在HepG2细胞和Hep3B细胞凋亡中的作用。方法 HepG2细胞和Hep3B细胞经饥饿处理后,观察DRAM的表达和自噬的发生;利用DRAM小干扰RNA(siRNA)阻断DRAM,观察饥饿诱导的自噬水平;采用Calcein AM/PI染色,观察DRAM siRNA对饥饿引起的细胞凋亡的影响。结果经饥饿处理后12、24、36h,HepG2细胞和Hep3B细胞内DRAMmRNA均显著高于处理前(P﹤0.001),细胞凋亡明显增加(P﹤0.01),但两种细胞系间细胞凋亡计数的差异无统计学意义。DRAM siRNA阻断DRAM的功能后,HepG2和Hep3B细胞自噬减少,但对饥饿引起的细胞凋亡没有明显影响。结论 DRAM参与了饥饿诱导的自噬,可能不是饥饿引起肝癌细胞凋亡的机制。     

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.