Genistein抑制肝细胞肝癌侵袭性生长的体外研究

目的研究genistein对肝癌细胞侵袭性生长的抑制作用及其作用机制.方法以体外培养的Bel 7402肝癌细胞株为研究对象,分别给予5靏/mL和10 靏/mL genistein干预,绘制细胞生长曲线,测定细胞活力和不同时间点细胞体外黏附能力变化,以Transwell小室测定细胞的体外侵袭能力,同时行局部黏着斑激酶(FAK)表达、细胞DNA含量的双参数流式细胞仪检测和细胞凋亡的流式细胞仪检测.结果genistein显著抑制Bel 7402肝癌细胞株的生长,其细胞活力显著下降,肿瘤细胞抑制率在G5组平均为26.71%,在G10组平均为42.64%;细胞体外黏附能力受到显著抑制,在genistein作用的前40 min内最为明显,40 min时的黏附抑制率在G5组为43.52%,G10组为84.18%;细胞体外侵袭能力显著下降,G10组的侵袭抑制率可达28%;细胞凋亡显著增加;细胞周期分析显示S期细胞比率显著降低,细胞生长主要阻滞在G2/M期;信号转导分子FAK表达在G10组(12.89±0.36)%显著低于对照组(19.75±1.12)%(P＜0.05).结论genistein可以显著抑制Bel 7402肝癌细胞株的体外侵袭性生长,FAK表达改变与genistein抑制作用的发挥相关.     

bcl—xl和p53在人肝癌Bel7402细胞中的表达及中药的干预作用

目的：从基因水平探讨白花蛇舌草多糖对体外培养的人肝癌Bel7402细胞凋亡诱导的作用及机制。方法：水提醇沉法提取白花蛇舌草多糖，人肝癌Bel7402细胞常规体外细胞培养，设定空白对照组、5-氟尿嘧啶阳性对照组、白花蛇舌草多糖组。HE染色法光镜下观察细胞形态改变，计算凋亡指数，采用MTT法检测白花蛇舌草多糖对癌细胞的生长抑制作用，RT—PCR法检测原癌基因bcl—xl、抑癌基因p53基因mRNA表达的变化。结果：白花蛇舌草多糖体外抑制人肝癌Bel7402细胞生长、促进细胞凋亡，凋亡指数达16．97％，以MTT显色法检测细胞抑制率达到61．5％，以RT—PCR半定量法检测，上调p53基因mRNA表达，降低bcl—xl基因mRNA表达，以上各指标与空白对照组相比均有显著差异。结论：白花蛇舌草多糖抑制人肝癌Bel7402细胞增长，诱导细胞凋亡，其分子机制可能与激活抑癌基因p53基因、抑制原癌基因bcl—xl基因表达有关。     

威灵仙对人肝癌细胞株Bel7402增殖及Bcl-2和Bcl-xl蛋白表达的影响

目的观察威灵仙对人肝癌Bel7402增殖及Bcl-xl、Bcl-2蛋白表达的影响。方法将人肝癌Bel7402分为空白对照组、阳性对照组和威灵仙组,分别用普通培养液、氟尿嘧啶培养液、威灵仙培养液进行培养。采用四甲基偶氮唑盐比色法测定威灵仙对人肝癌细胞Bel7402的体外生长抑制率,并用免疫组化法检测三组细胞的Bcl-xl、Bcl-2蛋白表达量。结果威灵仙对人肝癌Bel7402细胞有显著增殖抑制作用,威灵仙组与空白对照组比较有统计学意义(P<0.01);威灵仙可抑制Bcl-xl、Bcl-2蛋白的表达,威灵仙组与空白对照组比较有统计学意义(P<0.01)。结论威灵仙可抑制Bel7402的生长,其机制可能与抑制Bcl-xl和Bcl-2蛋白的表达有关。     

健脾化瘀方对肝癌HepG2细胞生物行为学的影响

目的:本研究旨在探讨:①健脾化瘀方体外对人肝癌细胞株HepG2增殖、黏附和侵袭的生物行为学影响;②健脾化瘀方体外对人肝癌细胞株HepG2凋亡的影响。方法:①采用MTT法、黏附实验、Transwell小室侵袭迁移实验,观察不同浓度的健脾化瘀方对人肝癌细胞株HepG2增殖、黏附和侵袭的影响;②利用流式细胞仪,AnnexinV/PI双染色法,研究不同浓度健脾化瘀方对人肝癌细胞株HepG2早期凋亡的诱导作用。结果:①健脾化瘀方有抑制人肝癌细胞株HepG2增殖的作用,并呈一定的浓度依赖性:同一时间不同浓度各组细胞的生长抑制率有明显差异(P<0.01)。②健脾化瘀方高、中浓度(2、1mg/mL)作用HepG 2细胞40、60和120min时,细胞的黏附能力明显降低(P<0.01)。健脾化瘀方作用HepG 2细胞24h后,侵袭的细胞数减少(P<0.05)。③健脾化瘀方对人肝癌细胞HepG2作用48h后,有诱导人肝癌细胞株HepG2凋亡的作用(P<0.05)。结论:①健脾化瘀方对人肝癌细胞株HepG2的增殖具有抑制作用;②健脾化瘀方能抑制人肝癌细胞株HepG2的黏附能力和侵袭能力;③健脾化瘀方有诱导人肝癌细胞株HepG2凋亡的作用。     

健脾化瘀方对肝癌HepG2细胞生物行为学的影响

目的：本研究旨在探讨：①健脾化瘀方体外对人肝癌细胞株HepG2增殖、黏附和侵袭的生物行为学影响;②健脾化瘀方体外对人肝癌细胞株HepG2凋亡的影响。方法：①采用MTT法、黏附实验、Transwell小室侵袭迁移实验,观察不同浓度的健脾化瘀方对人肝癌细胞株HepG2增殖、黏附和侵袭的影响;②利用流式细胞仪,AnnexinV/PI双染色法,研究不同浓度健脾化瘀方对人肝癌细胞株HepG2早期凋亡的诱导作用。结果：①健脾化瘀方有抑制人肝癌细胞株HepG2增殖的作用,并呈一定的浓度依赖性：同一时间不同浓度各组细胞的生长抑制率有明显差异（P〈0.01）。②健脾化瘀方高、中浓度（2、1mg/mL）作用HepG 2细胞40、60和120min时,细胞的黏附能力明显降低（P〈0.01）。健脾化瘀方作用HepG 2细胞24h后,侵袭的细胞数减少（P〈0.05）。③健脾化瘀方对人肝癌细胞HepG2作用48h后,有诱导人肝癌细胞株HepG2凋亡的作用（P〈0.05）。结论：①健脾化瘀方对人肝癌细胞株HepG2的增殖具有抑制作用;②健脾化瘀方能抑制人肝癌细胞株HepG2的黏附能力和侵袭能力;③健脾化瘀方有诱导人肝癌细胞株HepG2凋亡的作用。     

RNA干扰技术对SKOV3细胞EGFR表达的抑制作用

目的 探讨RNA干扰(RNAi)技术对卵巢腺癌细胞株SKOV3表皮生长因子受体(EGFR)表达的抑制作用.方法 体外化学合成EGFR序列特异性双链RNA(dsRNA),用lipofectamin 2000转染SKOV3细胞,采用RT-PCR和Western blotting技术检测EGFR mRNA和蛋白水平的变化,通过水溶性四唑盐(WST-1)比色法检测细胞增殖力,采用细胞黏附和移动实验检测细胞体外黏附和移动能力,通过细胞侵袭重建基底膜实验检测细胞体外侵袭能力.结果 序列特异性dsRNA-EGFR对SKOV3细胞EGFR mRNA和蛋白的抑制率分别为73.65%和58.94%.dsRNA-EGFR组在转染后24、48、72 h细胞增殖抑制率分别为22.54%、35.76%、31.07%;dsRNA-EGFR组在30 min和90 min黏附实验中的黏附率分别下降12.11%和18.66%;转染dsRNA-EGFR后细胞体外移动和侵袭能力的抑制率分别为25.47%和22.08%.结论 化学合成的dsRNA可抑制卵巢癌SKOV3细胞EGFR表达,抑制细胞增殖、移动、黏附和侵袭力.     

RNA干扰技术对SKOV3细胞EGFR表达的抑制作用

目的探讨RNA干扰(RNAi)技术对卵巢腺癌细胞株SKOV3表皮生长因子受体(EGFR)表达的抑制作用。方法体外化学合成EGFR序列特异性双链RNA(dsRNA),用lipofectamin 2000转染SKOV3细胞,采用RT-PCR和Western blotting技术检测EGFR mRNA和蛋白水平的变化,通过水溶性四唑盐(WST-1)比色法检测细胞增殖力,采用细胞黏附和移动实验检测细胞体外黏附和移动能力,通过细胞侵袭重建基底膜实验检测细胞体外侵袭能力。结果序列特异性dsRNA-EGFR对SKOV3细胞EGFR mRNA和蛋白的抑制率分别为73.65%和58.94%。dsRNA-EGFR组在转染后24、48、72 h细胞增殖抑制率分别为22.54%、35.76%、31.07%;dsRNA-EGFR组在30 min和90 min黏附实验中的黏附率分别下降12.11%和18.66%;转染dsRNA-EGFR后细胞体外移动和侵袭能力的抑制率分别为25.47%和22.08%。结论化学合成的dsRNA可抑制卵巢癌SKOV3细胞EGFR表达,抑制细胞增殖、移动、黏附和侵袭力。     

乙肝病毒X基因阻断降低肝癌细胞HepG2.215与纤维连接蛋白的黏附

目的探讨乙肝病毒X基因（HBX）在肝细胞癌（HCC）侵袭转移中的作用。方法利用psiRNA-hH1neo质粒,构建针对HBX的shRNA表达载体psiRNA1、psiRNA2、psiRNA3,转染肝癌细胞株HepG2.215,用荧光定量PCR仪检测siRNA对HBX mRNA表达的抑制作用,用Western blot法检测siRNA对HBX蛋白表达的抑制作用。以Transwell小室测定HepG2.215细胞与纤维连接蛋白（Fn）的体外黏附能力。结果成功构建shRNA表达载体,shRNA表达载体均可不同程度地抑制HBX的表达,其中psiRNA1对HBX的抑制作用最强,对HBX mRNA抑制率达80.27%,对HBX蛋白的抑制率为65.59%;细胞体外黏附能力受到明显抑制,在培养至48、72h后,对照组和转染组跨膜细胞数分别为442.6±57.1vs376.4±55.2和588.2±70.1vs513.6±68.5,两时相点均有明显差异（P〈0.05）。结论阻断HBX的表达可明显抑制肝癌细胞HepG2.215的体外侵袭性生长。     

RhoC-siRNA联合Rapamycin抑制人肝癌细胞Bel7402 VEGF表达

目的 检测RhoC-siRNA联合Rapamycin(Rapa)抑制人肝癌细胞Bel7402 VEGF表达.方法 实验以人肝癌细胞Bel7402为研究对象,分别设空白对照组、溶媒组、Rapa组、阴性对照组、阴性对照联合Rapa组、RhoC-siRNA组、RhoC-siRNA联合Rapa组,按不同实验组分别应用RhoC-siRNA、Rapa或RhoC-siRNA联合Rapa,采用RT-PCR和Western blot方法检测各实验组细胞VEGF的表达.结果 转染RhoC-siRNA 组细胞VEGF mRNA表达的抑制率为55.7%,应用Rapa组细胞VEGF mRNA表达的抑制率为17.3%,二者联合应用对VEGF mRNA表达的抑制率比单纯转染RhoC-siRNA和单纯应用Rapamycin抑制率分别提高20.3%和58.2%;转染RhoC-siRNA组细胞VEGF 蛋白表达的抑制率为53.5%(P＜0.01),应用Rapa组细胞VEGF 蛋白表达的抑制率为15.7%(P＜0.05),二者联合应用对VEGF蛋白表达的抑制率比单纯转染RhoC-siRNA和单纯应用Rapa抑制率分别提高18.4%和55.4%(P＜0.01).结论 沉默RhoC基因联合抑制mTOR蛋白,可增强对肝癌细胞Bel7402 VEGF表达的抑制,为肝癌的生物学治疗提供重要的实验依据.     

三氧化二砷对Bel-7402人肝癌细胞株的促凋亡作用

目的 :研究三氧化二砷 (As2 O3 )在体外是否具有抗肝癌作用 ,并对其作用机制进行初步探讨。方法 :用不同浓度的As2 O3 处理Bel 740 2人肝癌细胞株及L 0 2正常人肝细胞株 ,应用四甲基偶氮唑盐比色法 (MTT法 )观察As2 O3 对细胞生长的影响 ,并用电镜、流式细胞仪、DNA电泳等检测方法研究其作用机制。结果 :MTT法发现As2 O3 0 .5～ 2 .0mg·L-1的浓度均可显著抑制Bel 740 2人肝癌细胞株的生长 ,而对L 0 2正常人肝细胞株的抑制作用较弱。经As2 O3 作用后 ,透射电镜和扫描电镜观察均显示Bel 740 2细胞发生了显著的凋亡形态改变 ;提取细胞DNA行琼脂糖凝胶电泳可见典型的梯形条带 ;流式细胞仪分析可见有亚G1峰出现 ,凋亡率呈时间和剂量双重依赖性特点。结论 :As2 O3 在体外可显著抑制肝癌细胞株生长 ,其作用机制主要是诱导肿瘤细胞凋亡     

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.