环孢素A对人胃癌BGC823细胞增殖与凋亡的影响

目的 研究环孢素A(CsA)对人胃癌BGC823细胞的生长增殖以及凋亡的影响.方法 MTT法检测不同浓度CsA处理24、48、72 h后对BGC823细胞增殖抑制率;流式细胞术(FCM)检测细胞周期、活性氧(ROS)含量及细胞线粒体膜电位(△Ψm)改变;Annexin-V-FITC/PI双染法检测细胞凋亡率.结果 CsA在5～20 μmol/L浓度范围内和24 ～ 72 h时间范围对BGC823细胞增殖有显著抑制作用,与药物剂量、作用时间呈现量效和时效的依赖性;FCM结果显示CsA浓度依耐性使细胞周期阻滞于G0/G1期,与对照组相比差异有统计学意义(F=33.45,P＜0.05,P＜0.01);细胞凋亡率随CsA作用浓度增加而增加;5～ 20μmol/L CsA浓度范围细胞内ROS含量显著增加(F =46.17,P＜0.01),细胞线粒体膜电位明显降低.结论 CsA对BGC823细胞有抑制增殖和诱导凋亡作用,其机制可能与阻滞细胞生长周期、细胞内ROS含量增加以及线粒体膜电位下降相关.     

线粒体凋亡途径参与TRAIL诱导胃腺癌细胞凋亡

目的研究TRAIL诱导胃腺癌细胞凋亡的途径。方法PI染色、流式细胞仪检测细胞凋亡;广谱caspase抑制剂(z-VAD-fmk)、caspase-8抑制剂(z-IETD-fmk)和caspase-9抑制剂(z-LEHD-fmk)分别与TRAIL共同作用后PI染色、流式细胞仪检测细胞凋亡率的变化;Western blot检测caspase-3的活化及PARP的裂解;JC-1染色、流式细胞仪分析线粒体膜电位的变化。结果TRAIL诱导胃腺癌细胞凋亡具有剂量和时间依赖性,BGC-823较SGC-7901对TRAIL诱导的凋亡更敏感,TRAIL(100μg/L)作用24h细胞凋亡率分别是59.9%、24.3%;3种caspase抑制剂都能很大程度上阻止TRAIL诱导胃腺癌细胞凋亡;caspase-3、PARP在TRAIL作用早期即活化、裂解,且BGC-823比SGC-7901发生得更快;线粒体膜电位随TRAIL处理时间延长而不断下降。结论TRAIL能诱导胃腺癌细胞凋亡,且这种凋亡依赖于caspases;除死亡受体途径外,线粒体途径也参与了凋亡信号通路。     

EGCG经PI_3K-AKT信号通路诱导人胃癌BGC-823细胞G1期阻滞

目的探讨表没食子儿茶素没食子酸酯（Epigallocatechin-3-gallate，EGCG）通过PI3K-AKT通路对人胃癌BGC-823细胞周期调控的分子机制。方法采用噻唑蓝比色法（MTT）检测BGC-823细胞的存活率；碘化丙啶（PI）染色流式细胞术（flow cytometry，VCM）检测EGCG处理前后BGC823细胞周期的变化；Western blot检测PI3K-AKT信号传导通路相关蛋白的表达。结果EGCG能够抑制BGC823细胞的生长，且这种抑制作用与诱导BGC823细胞G1期阻滞有关。EGCG可以下调巩K-AKT信号通路蛋白Akt的磷酸化表达，对通路下游周期相关蛋白cyclinD1的表达也有抑制作用。结论EGCG能够通过活化PLK-AKT信号通路发挥诱导人胃癌BGC823细胞G1期阻滞的作用。     

小半夏加茯苓醇提物对HepG2、BGC823线粒体凋亡途径的影响

目的 探讨小半夏加茯苓醇提物对人肝癌细胞HepG2和人胃腺癌细胞BGC823增殖抑制作用及线粒体凋亡途径的影响.方法 运用CCK-8法检测HepG2、BGC823的增殖抑制情况,计算生长抑制率及半数抑制浓度;运用流式细胞术和实时荧光定量PCR检测HepG2、BGC823的线粒体跨膜电位和bax、cjun基因的表达情况.结果 小半夏加茯苓醇提物对HepG2、BGC823均有显著的抑制作用(P＜0.01),其半数抑制浓度分别为(781.50±13.00) μg/mL和(560.05±10.06)μg/mL;与空白对照组比,试验组HepG2的荧光强度升高(P＜0.05),试验组BGC823的荧光强度显著升高(P＜0.01);HepG2、BGC823试验组的bax、cjun基因的相对表达量与空白对照组比较,均显著升高(P＜0.01).结论 小半夏加茯苓醇提物诱导HepG2、BGC823凋亡的机制可能与激活线粒体途径有关.     

Embelin逆转白血病耐药细胞株K562/D对柔红霉素的耐药性

目的 证明酸藤子(embelin)可以逆转白血病耐药细胞株K562/D对柔红霉素(DNR)的耐药性.方法 应用MTT法求出embelin作用于K562/D 24 h后的IC10以及K562/D对DNR的耐药指数和逆转倍数;应用annexin V FITC/PI复染流式细胞仪检测细胞凋亡;应用JC-1染色流式细胞仪检测线粒体膜电位(△Ψm).结果 K562/D细胞对DNR耐药,耐药指数为7.72;小剂量embelin(5μg/ml)可以逆转K562/D细胞对DNR耐药性,逆转倍数为7.46;embelin(5μg/ml)与DNR(0.1 μg/ml)联合作用于K562/D细胞6 h后△Ψm即出现明显去极化,细胞凋亡率呈时间依赖性升高,与对照组比较有统计学差异.结论 embelin 可以通过促进细胞凋亡逆转K562/D对DNR的耐药性,并且在凋亡早期△Ψm已经出现明显去极化,说明凋亡不可逆转.     

紫花牡荆素通过线粒体凋亡途径诱导人宫颈癌HeLa细胞凋亡

目的:研究紫花牡荆素诱导人宫颈癌HeLa细胞凋亡作用,并探讨其诱导凋亡机制.方法:体外培养人宫颈癌HeLa细胞.细胞凋亡ELISA试剂盒检测HeLa细胞组蛋白/DNA碎片;碘化丙啶染色流式细胞术定量分析Sub-G1细胞百分率;DNA琼脂糖凝胶电泳观察DNA梯形条带.caspase比色试剂盒检测caspase-3/-9活性;Rh123探针染色FCM检测线粒体膜电位;Western blot检测细胞色素c、Bax、Bcl-2、Bcl-xL和XIAP蛋白的表达.结果:不同浓度的CAS处理48h后,HeLa细胞组蛋白/DNA碎片增加、Sub-G1细胞百分率显著增高、DNA琼脂糖凝胶电泳法观察到典型的DNA梯形条带;CAS处理组caspase-3/-9活性明显升高、线粒体膜电位降低、细胞色素c、Bax显著升高,而Bcl-xL和XIAP蛋白表达水平降低.结论:CAS通过线粒体凋亡途径诱导HeLa细胞凋亡.     

皖南蝮蛇抑瘤组分Ⅰ对人胃癌SGC-7901细胞作用机制的初步探讨

目的:探讨皖南蝮蛇抑瘤组分Ⅰ(AHVAC-Ⅰ)对人胃癌SGC-7901细胞作用的基本机制。方法:本实验选择SGC-7901细胞作为研究对象,体外条件下传代培养。按实验目的分为正常对照组和AHVAC-Ⅰ浓度组。MTT法检测不同浓度的AHVAC-Ⅰ对SGC-7901细胞的增殖抑制作用,通过化学荧光法对细胞内线粒体膜电位(△Ψm)分析。结果:AHVAC-Ⅰ能抑制SGC-7901细胞增殖,在一定范围内(3~30 mg/L)呈剂量依赖性,引起SGC-7901细胞出现死亡并伴随有染色质聚集、核破碎、凋亡小体等典型的凋亡形态学特征;此外还检测到有△Ψm降低现象。结论:AHVAC-Ⅰ对SGC-7901细胞的作用与线粒体凋亡途径有关,作用机制之一是通过降低△Ψm诱导人胃癌SGC-7901细胞凋亡。     

Survivin反义寡核苷酸经线粒体途径诱导肺癌细胞凋亡研究

目的: 探讨survivin反义寡核苷酸(antisense oligonucleotides,ASODN)诱导肺癌细胞凋亡的作用及survivin抗凋亡的分子机制。方法: 脂质体介导下,分别以100 nmol/L、300 nmol/L、500 nmol/L survivin ASODN作用于肺癌细胞株NCI-H446后,在不同时间用流式细胞仪(flow cytometry,FCM)检测凋亡;Rh123染色法检测细胞线粒体膜电位(mitochondrial potentialmembrane,△Ψm)变化,EL ISA法检测胞质细胞色素C(cytochrome C,Cyt C)浓度,比色法检测胞质内天冬氨酸特异性半胱氨酸蛋白酶-9(cystenyl aspartate specific proteinase-9,caspase-9)活性变化;加入caspase-9抑制剂Z-LEHD-FMK后FCM检测细胞凋亡。结果: Survivin ASODN 500 nmol/L作用72 h效果最佳,细胞凋亡指数(AI)达48.35%,增殖指数(PI)为24.38%;Survivin ASODN导致细胞△Ψm逐渐下降,并相继引起Cyt C的释放和caspase-9的激活。三者变化具有时间依赖性和差异性;Z-LEHD-FM K显著抑制了survivin ASODN诱导的细胞凋亡。结论: Survivin主要通过调控线粒体凋亡途径发挥抗肺癌细胞凋亡作用;Survivin ASODN能够显著诱导肺癌细胞凋亡,抑制细胞增殖。     

姜黄素对MPP~+诱导PC12细胞凋亡的抑制作用

目的观察姜黄素(Curcumin,Cur)对MPP+诱导的PC12细胞凋亡的影响,并且探讨其作用机理。方法采用MTT法检测细胞存活率,碘化丙啶染色流式细胞术(FCM)检测PC12细胞凋亡,罗丹明123染色FCM检测细胞线粒体膜电位(△Ψm),双氢罗丹明123染色FCM检测细胞内活性氧(ROS)的含量。结果不同浓度MPP+作用PC12细胞24h后,细胞存活率显著下降(P<0.01),与单纯MPP+处理组比较,20μmol/L Cur和不同浓度的MPP+同时处理PC12细胞24h后,细胞存活率显著升高(P<0.01);一定浓度的Cur对PC12细胞作用24h后无明显凋亡诱导作用,但可使MPP+处理组细胞凋亡率下降(P<0.01);20μmol/L Cur可抑制MPP+引起的PC12细胞△Ψm降低及细胞内ROS含量增多。结论姜黄素可以抑制MPP+诱导的PC12细胞凋亡,其作用机理可能与维持线粒体正常膜电位,稳定线粒体功能,清除ROS有关。     

白屈菜红碱对人胃癌BGC823细胞的增殖抑制和凋亡诱导作用

目的观察白屈菜红碱(che lerythrine)对人胃癌BGC 823细胞的增殖抑制和诱导凋亡作用。方法通过M TT实验检测白屈菜红碱对细胞生长的抑制率,AO/EB的荧光核染色观察细胞形态,DNA琼脂糖凝胶电泳及流式细胞术检测细胞周期和细胞凋亡。结果M TT实验显示白屈菜红碱抑制BGC 823细胞的生长呈时间、浓度依赖的方式,显微镜下观察到AO/EB的荧光核染后凋亡的细胞,琼脂糖凝胶电泳出现DNA的片段化,在白屈菜红碱质量浓度为1.5、2.0、2.5μg/mL且培养24 h时,流式细胞仪可以检测到凋亡峰,且细胞被阻滞在S和G2/M期。结论白屈菜红碱能有效地诱导BGC 823细胞凋亡,而且其诱导的凋亡具有周期依赖性。     

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.