透明质酸诱导人肺腺癌A549细胞表达血管内皮生长因子-C

目的：研究透明质酸（HA）对体外培养的人肺腺癌A549细胞表达血管内皮生长因子-C（VEGF-C）的影响。方法：体外培养的A549细胞被随机分为三组，对照组：无血清培养基（FSM）培养；HA10ug／ml组和HA20ug／ml组：分别用HA10ug／ml和20ug／ml的FSM培养，48h后，分别用RT-PCR、Westernblot和免疫荧光方法检测A549细胞VEGF-CmRNA和蛋白表达。结果：对照组VEGF-CmRNA和蛋白表达为弱阳性；HA10ug／ml和HA20ug／ml组VEGF-CmRNA和蛋白表达皆呈强阳性。HA20ug／ml组与HA10ug／ml组相比，VEGF-CmRNA和蛋白表达皆显著增加（P〈0．01）。结论：HA能呈剂量依赖性地诱导A549细胞表达VEGF-C。     

姜黄素诱导人肝癌HepG2细胞发生凋亡及对细胞生长周期的影响

目的研究中药姜黄素在体外诱导人肝癌HepG2细胞发生凋亡的机制及对细胞生长周期的影响。方法体外培养人肝癌HepG2细胞,用不同浓度的姜黄素（0.5、1.0、2.0、4.0、8.0和16.0μmol/L）刺激人肝癌HepG2细胞24、36和48h,MTT法及台盼蓝拒染法检测姜黄素对人肝癌HepG2细胞生长增值的影响并绘制生长曲线图,流式细胞术（FCM）检测其对细胞生长周期的影响。结果MTT法结果表明姜黄素对人肝癌细胞HepG2的生长具有抑制作用,2.0μmol/L浓度组在24h与对照组比较便具有统计学意义（P〈0.05）,16μmol/L浓度组与HepG2细胞作用48h后对HepG2细胞的生长抑制作用最强（54.78±2.35）%,台盼蓝拒染法发现细胞存活率与姜黄素浓度间具有剂量和时间效应;流式细胞仪检测结果表明8.0μmol/L姜黄素诱导了人肝癌HepG2细胞发生凋亡,并对细胞生长的S期有明显的阻滞作用。结论姜黄素在体外能阻滞HepG2细胞的生长增值,诱导了人肝癌HepG2细胞发生凋亡。     

三氧化二砷诱导肝癌细胞HepG2凋亡作用

目的 探讨三氧化二胂（As2O3)诱导肝癌细胞HepG2凋亡作用。方法 应用普通光学显微镜、荧光显微镜和流式细胞仪观察As2O3对HepG2细胞株的形态学改变和诱导凋亡率。结果 As2O3作用于细胞后,可看到较典型的细胞凋亡形态学改变,细胞体积缩小、染色质固缩成斑块状、呈半月型紧贴于核膜周边、核碎裂、凋亡小体形成等。AO／EB荧光染色法显示,细胞凋亡率为3．1％－9．1％。As2O3诱导HepG2细胞凋亡作用呈时间依赖性,最佳浓度为2μmol／L。流式细胞仪DNA直方图上呈现典型的亚二倍体凋亡峰。As2O3主要作用于细胞周期的G2／M期。结论 As2O3具有诱导HepG2细胞凋亡作用,具有治疗肝癌的潜在价值。     

丁酸钠对HepG2细胞诱导凋亡的作用及机制

目的探讨丁酸钠（sodium butyrate，SB）对HepG2细胞的诱导凋亡作用及与端粒酶活性的关系。方法采用MTT法检测5mmol／L丁酸钠在不同时间对HepG2细胞的增殖抑制作用；流式细胞仪检测丁酸钠作用于HepG2细胞后的凋亡情况，及细胞周期的改变；TRAP-ELISA法检测细胞端粒酶活性。结果丁酸钠能明显抑制HepG2细胞增殖，并且这种抑制作用具有时间依赖性。丁酸钠处理HepG2细胞48h凋亡率明显提高（P〈0．01），S期细胞比例显著下降（P〈0．05），G0／G1期细胞比例显著升高（P〈0．05）。实验组端粒酶活性为1.16±0．12，对照组端粒酶活性为3．58±0．33，实验组端粒酶活性明显降低（P〈0．05）。结论丁酸钠具有诱导HeoG2细胞凋亡的作用，其机制与抑制端粒酶活性有关。     

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。     

西瑞香素对人肝癌HepG2细胞增殖、凋亡及细胞周期的影响

目的 探讨西瑞香素对人肝癌HepG2细胞增殖、凋亡及细胞周期的影响.方法 用不同浓度的西瑞香素作用于体外培养的HepG2细胞,采用四甲基偶氮唑蓝法（MTT）检测西瑞香素对HepG2细胞增殖抑制能力;采用AnnexinV/PI双染流式细胞术测定西瑞香素对HepG2细胞凋亡的影响;采用PI单染流式细胞术检测西瑞香素对HepG2细胞周期的影响.结果 西瑞香素可抑制HepG2细胞的增殖,且存在明显的浓度和时间依赖关系;流式细胞术检测显示西瑞香素作用48 h后,实验组细胞未出现明显的早期凋亡细胞群.但实验组处于S期的细胞数较对照组明显减少（P＜0.05）,G0/G1期的细胞较对照组明显增多（P＜0.05）.结论 西瑞香素对人肝癌HepG2细胞的体外增殖具有抑制作用,可能与阻滞细胞周期有关.     

叶下珠复方Ⅱ号对人肝癌HepG2细胞增殖和凋亡作用

目的探讨叶下珠复方Ⅱ号（CPUⅡ）对体外培养的人肝癌细胞Hep劬增殖和凋亡的作用。方法采用四甲基偶氮唑盐比色法（MTT法）,比较不同浓度的叶下珠复方在不同作用时间对体外培养的HepG2细胞增殖的影响;应用流式细胞术（FCM）结合AnnexinV—FITC,PI荧光双染法观察CPUⅡ诱导24h后人肝癌Hep晚细胞的凋亡率。结果MTT结果显示,人肝癌HepG2细胞经叶下珠复方Ⅱ号处理一定时间后,增殖比率明显下降,2．60mg／ml以上的叶下珠Ⅱ号对人肝癌HepG2细胞株的增殖有抑制作用（P〈0．01;48hP〈0．05）,且呈一定的量效关系;FCM结果显示,随着叶下珠复方Ⅱ号浓度的增加（2．6、26．0、130．0mg／ml）,细胞的凋亡率也逐渐增加,差异有统计学意义（P〈0．01）。结论叶下珠复方Ⅱ号能够抑制人肝癌HepG2细胞生长和增殖,诱导人肝癌Hep岛细胞凋亡,呈明显的量效关系。     

重楼提取物对HepG2细胞的毒性作用

目的 研究重楼提取物对肝癌HepG2细胞的毒性作用及其机制。方法 应用锥虫蓝拒染法测定不同浓度重楼提取物作用不同时间后对HepG2细胞存活率的影响。通过倒胃相差显微镜、透射电镜及苏木精-伊红染色后光镜观察重楼提取物对HepG2细胞形态学的影响。通过碘化丙啶染色法及流式细胞术对重楼提取物是否诱导细胞凋亡进行验证。结果 各浓度重楼提取物都对肝癌HepG2细胞有一定的杀伤作用．浓度越高、作用时间越长，其杀伤作用越强；与阳性对照组（FT-207）相比，62．5、125μg／ml重楼提取物对HepG2细胞的杀伤作用较弱（P〈0．01．P〈0．05）．而250、500μg／ml重楼提取物的杀伤作用与其相当（P〉0．05）．1000、2000μg/ml重楼提取物的杀伤作用则明显较高（均P〈0．01）。重楼提取物作用后的HepG2细胞呈现变性坏死的形态学改变。流式细胞仪检测结果显示不同浓度重楼组与阴性对照组凋亡率无明显差异（P〉0．05）。结论 重楼提取物具有细胞毒性作用。重楼提取物可能不是通过诱导细胞凋亡．而是通过导致癌细胞的变性坏死发挥其抗癌作用。     

阻断氯通道对鼻咽癌细胞凋亡和细胞增殖的影响

目的研究阻断氧通道对低分化鼻咽癌（CNE-2Z）细胞凋亡和细胞增殖的影响，探讨氯通道在CNE-2Z细胞凋亡中的作用。方法用顺铂（CDDP）诱导细胞凋亡，流式细胞仪检测细胞凋亡，MTT法检测细胞增殖。结果顺铂（1．5μg/ml）处理细胞48h后可检测出凋亡峰，氯通道阻断荆NPPB（50μmol／L）阻抑顺铂诱导的细胞凋亡及细胞增殖抑制。结论氯通道参与了CNE-2Z细胞凋亡过程的调控。     

TAM诱导MA782细胞凋亡与CDK4关系

目的 探讨Tamoxifen（TAM）诱导ER（-）小鼠乳腺癌细胞MA782细胞凋亡及其分子作用机制。方法 TAM体外作用于MA782细胞，用MTT法检测细胞增殖活性、流式细胞仪检测细胞凋亡和细胞周期分布，免疫组化检测CDK4蛋白表达，并用病理图像分析软件进行半定量分析。结果 6、10μmol／L TAM在体外能明显抑制MA782细胞生长，诱导细胞凋亡，作用24h细胞凋亡率分别为7．04％、19．04％，10μmol／L TAM作用48h后细胞凋亡率从19．04％上升到51．27％，与对照组比较有显著差异（P〈0．01）。2μmol／L TAM作用于细胞不同时间后检测CDK4蛋白，与对照组无明显变化（P〉0．05），而6、10μmol／L TAM作用不同时间后，CDK4蛋白表达有不同程度的下降，与对照组相比差异显著（P〈0．05或P〈0．01）。结论 TAM诱导MA782细胞凋亡其分子作用机制可能与下调细胞CDK4蛋白表达有关。     

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.