芬维A胺对人肝癌细胞株HepG2增殖与细胞凋亡的影响

目的探讨分子靶向药物芬维A胺(Fenretinide)在体外对人肝癌细胞株Hep G2的细胞增殖与细胞周期的影响。方法体外培养人肝癌HepG2细胞,实验组在培养液中加入不同浓度的芬维A胺(2.5μmol/L、5μmol/L、10μmol/L、20μmol/L),对照组培养液中不加芬维A胺,分别孵育48 h后,采用MTT法检测芬维A胺对HepG2细胞增殖的影响,流式细胞仪分析细胞周期和凋亡率。结果芬维A胺能明显抑制HepG2细胞增殖,呈时间和剂量依赖性;芬维A胺处理HepG2细胞72 h,可使G0~G1期细胞比例升高,G2~M、S期比例明显下降,凋亡率明显上升(P<0.05)。结论芬维A胺对体外人肝癌HepG2细胞具有明显的抑制作用,主要表现为抑制增殖和促进凋亡。     

17-DMAG对肝癌HepG2细胞的作用研究

目的研究HSP90新型抑制剂17-二甲胺乙胺基-17-去甲氧基格尔德霉素(17-dimethy-laminoethylamino-17-demethoxygeldanamycin,17-DMAG)对肝癌细胞株HepG2增殖及凋亡的影响,并对其机制进行初步探讨。方法 MTT比色法检测不同浓度的17-DMAG及5 mg/L的DDP对HepG2细胞的生长抑制率;Annexin V-FITC/PI双染法检测经17-DMAG及DDP作用后HepG2细胞凋亡率的变化。结果 MTT法显示17-DMAG能抑制肝癌HepG2细胞的增殖,且呈时间-剂量依赖性。250 nmol/L的17-DMAG低浓度水平较DDP组对HepG2细胞的抑制率明显增高(P<0.05)。光学显微镜观察17-DMAG作用48 h后HepG2细胞密度减低,细胞体积变小,随着药物浓度增大,细胞数目明显减少。Annexin-FITC/PI双染法检测结果显示,400 nmol/L 17-DMAG干预48 h后细胞早期凋亡率为(22.42±1.83)%,5 mg/L顺铂干预48 h后细胞早期凋亡率为(6.50±1.20)%,未干预组48 h后细胞早期凋亡率为(0.58±0.49)%,表明17-DMAG能诱导HepG2细胞凋亡,且17-DMAG组凋亡率明显高于5 mg/L顺铂组及未干预组(P<0.05)。结论热休克蛋白90抑制剂17-DMAG呈时间-剂量依赖性抑制肝癌HepG2细胞增殖,随着药物浓度的加大,作用时间的延长,细胞增殖能力逐渐下降,并且能诱导HepG2肝癌细胞的凋亡。17-DMAG抑制肝癌细胞的作用较DDP强。     

青蒿素和青蒿琥酯对人乳腺癌MCF-7细胞的体外抑制作用比较研究

目的 对比研究青蒿素及其衍生物青蒿琥酯对人乳腺癌MCF—7细胞增殖的影响并探讨其作用机制。方法 采用体外培养的人乳腺癌MCF—7细胞株，利用SRB法测定青蒿素和青蒿琥酯对MCF—7细胞增殖的影响，FCM法测定细胞周期的变化，亚Gl期含量测定和DAN荧光染色法观察细胞凋亡。结果 10μmol/L青蒿素和lμmol/L青蒿琥酯能明显改变MCF—7细胞的细胞周期，使S期细胞显著减少，G0 Gl期细胞明显增加。青蒿素对MCF—7细胞增殖仅有微弱抑制作用，但其衍生物青蒿琥iB却有显著的抑制作用，IC50为0．3lμmol/L。同样，lμmol/L青蒿琥酷引起MCF—7细胞的凋亡和直接的细胞毒作用明显强于10μmol/L青蒿素的作用。结论 体外研究表明，对肿瘤细胞增殖的抑制青蒿琥酯比青蒿素作用强。     

大麻素受体激动剂WIN55,212-2联合金诺芬对人肝癌细胞HepG2增殖与凋亡的影响

目的 探讨大麻素受体激动剂WIN55,212-2(WIN)联合金诺芬(AF)对人肝癌细胞HepG2增殖和凋亡的影响,并对其机制进行初步研究.方法 分别用5 μmol/L WIN、0.25 μmol/L AF、5μmol/L WIN联合0.25μmol/L AF处理HepG2细胞24h和48 h后,MTS法检测细胞活力;采用AnnexinV-FITC和PI双染色法并通过流式细胞仪分析细胞凋亡;Western blot检测凋亡相关蛋白(Bcl-2、Bip、ATF4、PARP、Caspase-3、Caspase-8、Caspase-9)表达的变化.分别用5μmol/L WIN联合0.25 μmol/L AF、Z-VAD-FMK以及Z-VAD-FMK预处理1h后再用5 μmol/L WIN联合0.25 μmol/L AF处理HepG2细胞24 h,Western blot检测蛋白PARP、Caspase-3、Caspase-8、Caspase-9的变化.结果 与两药单独使用相比,WIN联合AF明显抑制细胞增殖,诱导细胞凋亡,可以引起Bcl-2蛋白表达水平下调,内质网应激反应相关蛋白Bip、ATF4蛋白表达水平上调,以及活化Caspase-3、Caspase-8、Caspase-9,引起PARP蛋白的切割.加入Caspase广谱抑制剂Z-VAD-FMK处理细胞后,能部分逆转联合用药的细胞凋亡比例.结论 大麻素受体激动剂WIN联合AF能有效诱导肝癌细胞凋亡,其机制可能与Bcl-2表达下调、内质网应激反应和Caspase系统活化相关.     

葡萄籽原花青素提高人肝癌HepG2细胞对化学治疗药物的敏感性研究

目的探讨原花青素对提高人肝癌HepG2细胞对化学治疗药物的敏感性。方法运用一定浓度的原花青素分别联合5-氟尿嘧啶(5-Fu)、顺铂(DDP)、阿奇霉素(DOX),作用于肝癌HepG2细胞48 h后,采用WST-8法检测细胞增殖抑制率。结果原花青素组(终浓度800 mg/L)对细胞的增殖抑制率为25.7%。根据金正均的Q值法计算各组作用的协同性,原花青素联合化学治疗药物,当5-Fu浓度为2、4、8、16μg/mL时,Q值分别为0.92、0.96、1.10、1.12,表现为作用相加(0.851.15);当DOX浓度为0.2、0.4、0.8、1.6μg/mL时,Q值分别为1.15、1.17、1.10、1.16表现为协同作用(Q>1.15)。结论葡萄籽原花青素可提高人肝癌HepG2细胞对化学治疗药物5-FU、DDP、DOX的敏感性。     

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。     

NU7026对人肝癌细胞HepG2生物学行为的影响

目的探讨NU7026对HepG2细胞的影响,为治疗肝癌提供理论基础。方法用NU7026作用HepG2细胞,将实验分为空白组、对照组和NU7026组。 CCK8实验检测NU7026对肝癌HepG2细胞存活率的影响。生长曲线实验和克隆实验检测HepG2细胞增殖能力,划痕实验检测HepG2细胞迁移能力,流式细胞术检测HepG2细胞凋亡和周期。结果与0 μmol/L组和DMSO组比较,15 μmol/L和20 μmol/L NU7026作用于HepG2细胞,细胞存活率明显下降(P＜0.05);与DMSO组相比,10 μmol/L NU7026作用于HepG2细胞24、48、72 h后,细胞存活率下降(P＜0.05);10 μmol/L NU7026作用HepG2细胞,细胞增殖能力和迁移能力下降(P＜0.05),细胞凋亡率增加(P＜0.05),细胞周期无明显改变。结论NU7026能抑制HepG2细胞增殖能力和迁移能力可能与促进细胞凋亡有关。     

青蒿琥酯抑制肺腺癌A549细胞的增殖及相关机制的研究

目的 研究青蒿琥酯对人肺腺癌A549细胞增殖的影响及相关机制.方法 体外培养人肺腺癌A549细胞,采用不同浓度青蒿琥酯(0、25、50、100和200μmol/L)处理细胞,MTT还原法检测其对细胞增殖的抑制效应;采用流式细胞术检测其对细胞活性氧和细胞周期的影响.青蒿琥酯(0和100μmol/L)处理24 h后,收集细胞并提取细胞总蛋白,免疫印迹技术分析P-S6 K1、TSP50和MMP-2表达或磷酸化变化.结果 青蒿琥酯以浓度依赖方式抑制A549细胞增殖,IC50值约为100μmol/L.药物导致G0-G1期细胞百分率增加;当其浓度≥50μmol/L,细胞内活性氧随浓度增加而增加.青蒿琥酯抑制细胞内TSP50和MMP-2表达,并下调S6K1磷酸化.结论 青蒿琥酯抑制A549细胞增殖,其机制可能涉及抑制增殖周期和激发活性氧,以及下调S6 K1磷酸化;青蒿琥酯可能具有拮抗NSCLC转移侵袭的作用.     

顺铂、三氧化二砷对人卵巢癌细胞的作用研究

目的:探讨顺铂(DDP)、三氧化二砷(As2O3)对人卵巢癌细胞 HO-8910 的联合作用及其分子生物学机制.方法:采用形态学方法研究 DDP、As2O3 对细胞增殖的影响,免疫化学染色法检测基因表达.结果:1.联合作用时,As2O3 浓度在 1.5μmol/L 以上、DDP浓度在2μmol/L 以上时,有显著性差异;当三氧化二砷、顺铂浓度分别是12μmol/L、4μmol/L 时,72h 时癌细胞接近100%死亡.2.DDP、As2O3 引起HO-8910 细胞 p53 基因表达增强.结论:DDP、As2O3对人卵巢癌细胞 HO-8910的生长有协同抑制作用;DDP、As2O3 联合作用引起卵巢癌细胞凋亡的机制与 p53 基因表达增强有关.     

青蒿琥酯对人表皮鳞癌A431细胞增殖和凋亡的影响

目的 初步探讨青蒿琥酯(artesunate,ART)对人表皮鳞癌细胞增殖和凋亡的影响及其相关机制.方法 以人表皮鳞癌细胞系A431为研究对象,人永生化角质形成细胞系HaCaT为正常对照,顺铂(diamminedichloroplatinum,DDP)为药物阳性对照,通过MTT法和流式细胞术观察ART对A431细胞增殖和凋亡的影响,以及铁离子抑制剂去铁敏(desferrioxamine.DFOM)部分阻断ART对A431细胞的生长抑制作用.结果 ART对A431细胞有较明显的增殖抑制作用,对HaCaT细胞的损害显著低于DDP;药物组ART60 μmol/L(IC50)作用A431细胞48 h,A431细胞阻滞于S期[(67.60±4.12)%,P<0.05],同时凋亡率上调[(19.87±0.03)%,P<0.01];药物阻断组DFOM 60μmol/L预处理A431细胞4 h、加入ART60 μmol/L作用钙h,凋亡率显著下调[(7.37±0.02)%,P<0.01],而周期检测未发生变化.结论 ART通过阻滞A431细胞停滞于S期和诱导A431细胞凋亡发挥增殖抑制作用,此作用在一定范围内与药物剂量呈正相关;ART对A431细胞的诱导凋亡作用与Fe2+介导有关;ART毒副作用明显低于DDP.     

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.