黄酮类化合物对癌细胞周期的影响及诱导癌细胞凋亡的作用

目的探讨黄酮类化合物对癌细胞周期的影响及诱导癌细胞凋亡的作用。方法用流式细胞术分析低分化人鼻咽癌细胞(CNE2)在对照组及杨梅素浓度125μg／ml、250μg／ml、500μg／ml不同环境中G1期，S期，G2M期细胞比例，分析黄酮类化合物对癌细胞周期的影响及诱导癌细胞凋亡的作用。结果杨梅素影响CNE2细胞的细胞周期，使G1期细胞增多，S期细胞减少。结论杨梅素能影响CNE2细胞的细胞周期，诱导CNE2细胞的凋亡。     

大蒜素对人肝癌HepG2细胞增殖抑制作用的研究

目的研究大蒜素对人肝癌HepG2细胞增殖抑制、细胞凋亡及细胞周期的影响。方法用不同浓度的大蒜素作用于体外培养的HepG2细胞,采用MTT法检测大蒜素对HepG2细胞增殖抑制能力,荧光显微镜观察HepG2细胞的形态学变化,流式细胞术检测大蒜素对HepG2细胞周期和凋亡率的影响。结果大蒜素可抑制人肝癌HepG2细胞增殖,且具有明显剂量和时间依赖性,24h、48h和72h大蒜素抑制HepG2细胞的IC50分别为(48.26±1.66)μg/mL、(31.89±1.51)μg/mL和(23.79±1.32)μg/mL。32μg/mL大蒜素作用HepG2细胞48h,可诱导其产生明显的细胞凋亡特征。流式细胞术检测表明大蒜素作用HepG2细胞后,可将细胞阻滞在G2/M期。结论大蒜素对人肝癌HepG2细胞增殖具有抑制作用,可能与诱导细胞凋亡和阻滞细胞周期有关。     

茶多酚对人癌细胞和人体细胞增殖及凋亡的实验研究

目的 选用4种人癌细胞和3种人体正常细胞进行试验，比较茶多酚(TP)对人肝癌细胞Bel—7402等和人体肝细胞CLC增殖周期的影响和诱导凋亡的作用。方法 用MTT法测定TP对人癌细胞和人体正常细胞的细胞毒作用，用流式细胞仪(FCM)观察TP对细胞的周期改变和诱导凋亡作用。结果 TP对人癌细胞Bel—7402，CNEl，KB和H—29的IC50依次为68．2，104．63，119．83和148．61μg／mL；对人体正常细胞CLC，HEK—293和HD—MEC的IC50均＞400μg／mL。150和300μg／mL TP处理Bel-7402细胞12，24和36h，细胞凋亡率分别为13．2％，37．6％，40．7％和17．1％，39．9％，57．7％。表明TP可诱导Bel—7402细胞凋亡，使细胞周期停滞于S—G2／M期，而对CLC细胞无此作用。结论 TP对人癌细胞的细胞毒作用显著高于对人体正常细胞的作用，提示TP对人癌细胞有一定的选择杀伤作用。     

蛋白激酶C抑制剂staurosporine对人结肠癌COLO320细胞周期的影响

目的 探讨蛋白激酶C(protein kinase c,PKC)抑制剂staurosporine(STS)对人结肠癌细胞株COLO320的增殖抑制、凋亡诱导及对细胞周期的影响.方法 在培养的COLO320细胞中,加20、60及100ng/mL STS和100ng/mL佛波酯(PMA),作用24h后,用MTT法测细胞增殖,流式细胞仪检测细胞凋亡率及细胞周期的变化.结果 STS抑制COLO320细胞生长,24h的IC50为55ng/mL.20、60及100ng/mL STS分别作用细胞24h后,发现G0/G1期细胞分别为(47.30%±1.53%)、(49.50%±1.54%)和(51.60%±2.12%),G2/M期细胞分别为(30.45%±1.32%)、(34.50%±1.23%)和(37.70%±1.82%);100ng/mL PMA组G0/G1期细胞为(57.10%±1.89%),G2/M期细胞为(24.70%±0.35%);空白对照组G0/G1期细胞为(50.60%±1.69%),G2/M期细胞为(1.85%±0.78%).20、60及100ng/mL STS组与100ng/mL PMA组及空白对照组比较,STS使细胞G0/G1期均减少(P<0.05)及G2/M期均明显增加(P<0.01).STS作用24h后细胞的G1期前出现明显的凋亡峰.结论 STS通过抑制PKC的活性,使细胞被阻滞于G2期,从而抑制COLO320细胞的增殖及诱导细胞凋亡.     

多西紫杉醇对人胃癌细胞株MKN-45的抑制及诱导凋亡作用的研究

目的:研究多西紫杉醇对人胃腺癌MKN-45细胞的生长抑制作用及诱导人胃腺癌细胞凋亡作用。方法:采用MTT法测定细胞增殖抑制率,流式细胞技术检测细胞周期分布和凋亡率,应用电镜观察细胞凋亡的形态特点。结果:(1)多西紫杉醇在1.25~80μg.m l-1质量浓度范围内对MKN-45细胞株有抑制增殖作用,此作用与药物质量浓度呈正相关。(2)终质量浓度为20μg.m l-1的多西紫杉醇作用于MKN-45细胞8 h有凋亡峰的出现,12 h凋亡率接近50%。(3)以20μg.m l-1的多西紫杉醇诱导MKN-45细胞凋亡3 h和6 h与未加药的对照组比较,可见MKN-45细胞周期被阻滞在G2/M期,S期比例减少。(4)20μg.m l-1的多西紫杉醇作用MKN-45细胞12 h,可见典型的凋亡形态学改变。结论:多西紫杉醇可抑制人胃腺癌MKN-45细胞增殖,诱导MKN-45细胞凋亡。     

大蒜素协同紫杉醇对肺癌细胞杀伤作用的实验研究

目的探讨大蒜素对人肺癌A549细胞周期的影响及其与周期特异性抗癌药物紫杉醇联合使用的抗肿瘤作用。方法MTT法检测大蒜素对肺癌细胞的增殖抑制作用,流式细胞仪检测细胞周期改变,Annexin V-FITC标记法定量检测细胞凋亡,观察大蒜素与紫杉醇联合使用后药物对细胞毒活性的改变。结果大蒜素可明显抑制A549细胞生长,72h药物半数抑制浓度(IC50)为18.55μg.ml-1;9.30μg.ml-1大蒜素作用A549细胞24 h后,与对照组比较,G0/G1期细胞的百分率明显减少,而G2/M期明显增加(P<0.05),大蒜素与紫杉醇联合使用后,紫杉醇72 hIC50值由单独应用的9.21μg.ml-1下降至1.07μg.ml-1;细胞凋亡率由53.2%增至97.0%。结论大蒜素可将肺癌A549细胞阻滞于G2/M期,大蒜素与紫杉醇联合使用可能具有协同抗肿瘤作用。     

生长抑素类似物抑制人肝癌细胞生长和诱导其凋亡

目的 探讨生长抑素类似物奥曲肽抑制人肝癌细胞生长及诱导其凋亡的作用.方法 将10μg/ml的奥曲肽置人经体外培养的肝癌细胞SMMC-7721中,经RNA酶消化和DNA-Stain染色后,用流式细胞仪式测定细胞DNA含量,并做细胞周期分析,计算凋亡率.结果 奥曲肽组S期和G2/M期细胞数减少、G0/G1期细胞数增加,奥曲肽组和对照组细胞的凋亡率分别为15.1%和6.5%;奥曲肽组肝癌细胞增殖停留在G0//G1期,同时S期和G2/M期的细胞数量减少,细胞增殖能力降低并发生凋亡,G1峰前出现亚G1峰(凋亡峰),其凋亡率明显高于对照组(P<0.05).结论 奥曲肽可以通过诱导人肝癌细胞凋亡而抑制人肝癌细胞的生长.     

人肝癌顺铂耐药细胞株HepG2的建立

目的体外建立顺铂(DDP)诱导的人肝癌耐药细胞株(HepG2/DDP),研究其生物学特性。方法以采用药物大剂量冲击结合低剂量持续诱导方法诱导HepG2细胞株,建立人肝癌顺铂耐药细胞株HepG2/DDP;MTT法检测顺铂对HepG2和HepG2/DDP的半数抑制浓度(IC50)和耐药系数(RI),绘制细胞生长曲线及计算细胞倍增时间,并用流式细胞仪(FCM)检测细胞周期。结果历时5个月成功建成HepG2/DDP细胞株,MTT法检测DDP对HepG2的IC50为1.35μg/ml,HepG2/DDP的IC50为23.35μg/ml,RI达17生长曲线表明其增殖速度明显低于亲本HepG2人肝癌细胞,且倍增时间增加;细胞周期分析发现相对于亲本HepG2细胞,G0/G1期细胞减少、S期与G2/M期细胞增多。结论成功建立稳定耐药细胞株HepG2/DDP。     

钩吻B2组分对Hela细胞增殖和细胞周期的影响

目的:探讨钩吻醇提-氯仿萃取(GW-B2)组分对Hela细胞生长与增殖以及细胞周期的影响。方法:采用XTT法分析细胞生长与增殖,Timelapse显微镜观察细胞生长和形态,流式细胞仪检测凋亡和细胞周期,综合评价GW-B2组分抗Hela细胞的作用。结果:GW-B2具有明显抑制Hela细胞生长与增殖的作用,1μL/mL GW-B2组分处理的Hela细胞生长速度明显降低,在2~5μL/mL的剂量范围内,细胞生长与增殖能力基本完全被抑制。GW-B2组分处理后,Hela细胞主要的形态学变化为贴壁能力丧失,悬浮细胞增多,细胞分裂阻滞,部分细胞崩解破碎。GW-B2组分能明显的诱导Hela细胞凋亡,1μL/mL、2μL/mL和5μL/mL GW-B2组分处理72h后,Hela细胞的凋亡率分别可达8.16%、36.83和61.32%,而对细胞周期的影响主要是G2/M期阻滞,同时对G0/G1期也有一定的阻滞作用。结论:GW-B2组分具有抑制Hela细胞增殖、诱导凋亡,具有明显的抗肿瘤细胞的作用;GW-B2组分对细胞周期的影响主要是G2/M期阻滞,随后可诱导细胞的凋亡。     

二甲基亚砜诱导人肝癌细胞BEL-7402凋亡的研究

目的 :研究二甲基亚砜 (DMSO)对人肝癌细胞凋亡的诱导作用。方法 :用不同浓度的DMSO处理体外培养的人肝癌细胞BEL 74 0 2 ,应用普通光镜、荧光显微镜、MTT分析方法和流式细胞技术 (FCM )检测肝癌细胞凋亡的形态学变化、细胞存活率、凋亡百分率和细胞周期分布的变化。结果 :DMSO诱导BEL 74 0 2细胞核DNA凝缩和核片段化 ,最后形成凋亡小体 ;随着DMSO浓度的增加和处理时间的延长 ,细胞存活率明显下降 ,其IC50 为 1.9% ;2 %的DMSO处理细胞 12h ,凋亡率达 17.2 1% ,同时S期细胞明显增加 ,G2 M期细胞明显下降。结论 :DMSO可诱导人肝癌细胞凋亡 ,并使细胞受阻于S期而进入凋亡程序。     

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.