环氧化酶-2抑制剂NS398对肾癌细胞增殖和凋亡的影响

目的:探讨环氧化酶-2(Cyelooxygenase-2,COX-2)抑制剂NS398对肾癌细胞786-0增殖和凋亡的影响.方法:不同浓度NS398作用体外培养的786-0细胞后,采用噻唑蓝(MTT)法检测24、48、72、96 h后肾癌细胞786-0的增殖活性.终浓度为30、180μmol/L的NS398作用786-O细胞72 h后,免疫细胞化学检测COX-2蛋白表达;RT-PCR法检测COX-2mRNA表达;流式细胞仪检测细胞凋亡情况.结果:NS398可以抑制786-O细胞的增殖,呈时间和剂量依赖型.RT-PCR法检测显示NS398作用后能降低COX-2mRNA表达.免疫细胞化学结果显示NS398作用后能降低COX-2蛋白表达.流式细胞仪检测表明,30、180 μmol/L NS398处理组凋亡率分别为14.3%±1.4%、31.5%±2.1%,与对照组凋亡率2.1%±0.4%比较,凋亡率显著上升(P<0.05).结论:NS398可能通过降低COX-2表达,抑制肾癌细胞增殖和诱导其凋亡.     

COX-2抑制剂NS398通过抑制前列腺素E2诱导肾癌细胞的凋亡

目的:揭示环氧合酶2(COX-2)在肾癌细胞中的表达情况,通过COX-2抑制剂NS398作用肾癌细胞探讨非甾体抗炎药(NSAID)对肾癌细胞增殖作用的影响及其可能的作用机制。方法:采用标准的细胞培养方法对人肾癌786-0细胞进行培养,将NS398分别以25,50,100,150及200μmol/L的剂量加入细胞中作用24及48h后,MTT法检测NS398对肾癌细胞增殖的影响;作用24h后,流式细胞仪测定细胞凋亡的情况,EIA法测定细胞中前列腺素E(2PGE2)含量的变化,Western blotting测定COX-2蛋白表达的情况。结果:NS398对肾癌786-0细胞具有较强的抑制作用,且这种抑制作用随浓度和时间的增加而增大,呈浓度依赖关系(P<0.05);NS398作用肾癌786-0细胞24h后,在细胞周期G0/G1期前出现明显的亚二倍体凋亡峰,随着浓度升高,凋亡峰亦越来越增高(P<0.05);NS398可抑制PGE2释放,并且这种抑制作用呈剂量效应,与对照组相比有统计学意义(P<0.05);不同浓度NS398作用下的肾癌786-0细胞中,COX-2的表达明显减弱,且呈剂量梯度下降。结论:NS398通过诱导凋亡来抑制肾癌786-0细胞的增殖;NS398诱导肾癌786-0细胞的凋亡作用机制可能是通过抑制COX-2的表达,降低肾癌786-0细胞PGE2的合成,减少前列腺素对肿瘤细胞增殖的刺激作用来抑制增殖和促进凋亡的。     

肾癌细胞中环氧合酶-2的高表达及NS398对肾癌细胞生长抑制和凋亡作用机制的研究(英文)

目的揭示COX-2选择性抑制剂NS398对肾癌细胞的增殖和凋亡作用的影响，及其可能的作用机制。方法采用标准的细胞培养方法对人肾癌786—0细胞进行培养，将NS398分别以不同浓度剂量加入细胞中作用24及48h后，应用流式细胞仪检测凋亡，应用RT-PCK和Western blotting检测COX-2和Bcl-2表达的改变。结果NS398对肾癌786-0细胞具有较强的抑制作用，且这种抑制作用随浓度和时间的增加而增大，呈浓度依赖关系（P〈0．05）；RT—PCR和Western Blot结果表明，不同浓度NS398作用下的肾癌786-0细胞中，COX-2和Bcl-2的表达明显减弱，且呈剂量梯度下降。NS398作用于肾癌786-0细胞24h后。在细胞周期G0／G1期前出现明显的亚二倍体凋亡峰，随着浓度的升高，凋亡峰亦越来越高（P〈0．05）。结论肾癌786—0细胞中存在着COX-2的过表达；选择性COX-2抑制剂NS398通过诱导凋亡来抑制肾癌786—0细胞的增殖，其机制可能是通过抑制COX-2的表达及下调Bcl-2来完成的。     

选择性环氧化酶-2抑制剂NS-398抗结肠癌机制及对5-氟尿嘧啶化疗的辅助作用

目的 研究选择性环氧化酶-2(COX-2)抑制剂NS-398的抗结肠癌作用机制及其在5-氟尿嘧啶(5-Fu)化疗中的辅助作用。方法 (1)用逆转录-聚合酶链反应(RT—PCR)检测结肠癌HT-29、SW480细胞COX-2 mRNA表达后,将NS-398作用于两株细胞,用ELISA法测定前列腺素E2(PGE2)水平。(2)将NS-398、5-Fu、NS-398 5-Fu分别作用于两株细胞,24、48和72h后用MTT法检测细胞增殖状态。以流式细胞技术观察药物对细胞凋亡的影响。结果 (1)HT-29细胞中COX-2 mRNA呈高表达,NS-398作用后PGE2表达水平明显降低;SW480细胞中COX-2 mRNA表达呈阴性,NS-398作用后PGE2水平无明显变化。(2)NS-398、5-Fu呈剂量依赖性方式抑制结肠癌细胞增殖,诱导其凋亡;NS-398 5-Fu抗增殖的作用较单一用药时更明显,而凋亡诱导作用与单一用药差异无显著意义。结论 选择性COX-2抑制剂NS-398具有抗结肠癌作用;NS-398抗结肠癌作用可能不依赖于COX-2和PGE2的表达水平;NS-398与5-Fu具有协同的抗增殖作用。     

MDP通过上调口腔癌细胞COX-2/PGE2表达促进其趋化和增殖

目的 研究细菌细胞壁成分MDP对口腔癌细胞Tca8113 COX-2/PGE2表达的影响.方法 RT-PCR检测NOD2、COX-2在Tca8113细胞的表达;不同浓度MDP刺激Tca8113细胞后,采用RT-qPCR、MTT、ELISA及趋化实验分别检测其对COX-2/PGE2表达、细胞增殖和细胞趋化的影响.结果 ①Tca8113细胞表达NOD2、COX-2 mRNA; MDP促进COX-2 mRNA表达;②与对照组比较,MDP刺激Tca8113后PGE2分泌、细胞增殖、趋化显著增加(P＜0.05);与MDP组比较,MDP+NS-398组PGE2分泌、细胞增殖、趋化显著降低(P＜0.05);与NS-398组比较,MDP+NS-398组细胞增殖仍然显著增强(P＜0.05).结论 MDP促进肿瘤细胞趋化和增殖.上调口腔癌细胞COX-2/PGE2表达是其作用机制之一.     

姜黄素对肾癌786-O细胞增殖及凋亡的实验研究

目的观察姜黄素对肾癌786-O细胞缺氧诱导因子-1α(HIF-1α)和X连锁凋亡抑制蛋白(XIAP蛋白)表达水平以及细胞凋亡的影响,研究姜黄素对肾癌细胞的生长抑制作用并探讨其分子机制,进一步揭示姜黄素对肾癌的治疗作用。方法不同浓度姜黄素作用人肾癌786-O细胞24、48、72 h后,应用四甲基偶氮唑蓝(MTT)比色法检测姜黄素对人肾癌786-O细胞的增殖抑制率;流式细胞术检测姜黄素诱导细胞的凋亡率;免疫细胞化学检测姜黄素对786-O细胞HIF-1α和XIAP表达的影响。结果姜黄素对人肾癌786-O细胞有明显的抑制作用,可引起细胞凋亡,并且存在剂量和时间依赖;不同浓度姜黄素作用细胞48 h后,HIF-1α和XIAP蛋白表达量下降。结论姜黄素通过下调HIF-1α和XIAP的表达抑制人肾癌786-O细胞的增殖,诱导人肾癌786-O细胞的凋亡。     

NS398逆转溶血磷脂酸拮抗顺铂抑制卵巢癌细胞增殖作用的研究

目的:观察环氧化酶-2(Cyclooxygenase-2,COX-2)抑制剂NS398对溶血磷脂酸(Lysophosphatidic acid,LPA)拮抗顺铂抑制卵巢癌细胞细胞增殖作用的影响,并探讨其可能机制.方法:体外培养人卵巢癌细胞3AO,MTY法检测NS398对LPA拮抗顺铂抑制3AO细胞增殖的影响;流式细胞仪检测细胞周期变化;RT-PCR检测LPA单独或合用NS398对3AO细胞表达COX-2的影响.结果:LPA对顺铂抑制卵巢癌细胞增殖有拮抗作用,并降低G_0/G_1期的细胞比率;联合用NS398后,卵巢癌细胞的生长显著受抑制,同时G_0/G_1期细胞比率上升;RT-PCR结果显示40μmol/L LPA能促进COX-2的表达,而合用NS398后COX-2表达降低.结论:NS398可能通过抑制COX-2表达,实现逆转LPA拮抗顺铂抑制卵巢癌细胞细胞增殖的作用.     

NS398通过环氧合酶-2非依赖途径诱导胰腺癌BxPC-3细胞凋亡

目的探讨选择性环氧合酶-2(COX-2)抑制剂NS398对人胰腺癌BxPC-3细胞增殖和凋亡的影响及其分子机制.方法采用四甲基偶氮唑蓝(MTY)比色法观察不同浓度的NS398对BxPC-3细胞增殖的影响;流式细胞术、悬浮细胞/贴壁细胞比值测定BxPC-3细胞凋亡的改变,并检测Caspase-3活化情况;逆转录聚合酶链反应(RT-PCR)法检测不同浓度NS398作用下BxPC-3细胞COX-1、COX-2 mRNA水平的变化,Western blot法检测COX-1、COX-2及Caspase-3蛋白水平的改变.结果MTT及流式细胞术结果显示,NS398呈剂量依赖性地抑制BsPC-3细胞增殖,并可诱导其凋亡;随着NS398处理浓度的增加,悬浮细胞/贴壁细胞比值显著上升,Caspase-3活性上调,在高浓度时尤为明显.RT-PCR和Western blot结果显示,COX-1 mRNA及蛋白表达不受NS398药物作用影响,COX～2 mRNA及蛋白表达在各浓度组中亦无明显变化,Caspase-3蛋白水平在高药物浓度时表达上调.结论选择性COX-2抑制剂NS398对胰腺癌BxPC-3细胞有显著的增殖抑制和凋亡诱导作用,这种效应与COX-2表达无明显相关,而与Caspase-3的活化密切相关.     

NS-398诱导肝癌细胞HepG2凋亡的作用机制

目的 探讨NS-398诱导肝癌细胞HepG2凋亡的分子机制.方法 采用MTT法测定COX-2选择性抑制剂NS-398对HepG2细胞的增殖抑制率;流式细胞仪检测凋亡;原位细胞凋亡检测法观察细胞凋亡形态学变化;免疫细胞化学分析COX-2、cIAP-1、XIAP、Survivin蛋白变化.结果 NS-398对HepG2细胞株有增殖抑制作用,流式细胞仪检测用药组凋亡率明显高于对照组.TUNEL染色可见典型的凋亡形态学特征.免疫细胞化学分析表明使用NS-398后,COX-2、cIAP-1、XIAP、Survivin蛋白表达降低.结论 COX-2选择性抑制剂NS-398对人肝癌细胞株HepG2有诱导凋亡作用,其机制可能通过抑制COX-2,下调cIAP-1、 XIAP、 Survivin的表达而诱导凋亡.     

NS398诱导人骨肉瘤细胞MG-63凋亡及对bcl-2蛋白表达的影响

目的研究环加氧酶-2（cyclooxygenase-2，COX-2）抑制剂NS398抑制人骨肉瘤细胞MG-63增殖及诱导其凋亡的效应和机制。方法MTT比色法观察NS398的细胞毒性作用及其浓度依赖性；透射电子显微镜观察细胞凋亡的形态学变化；琼脂糖凝胶电泳观察凋亡细胞DNA Ladder形成。流式细胞仪检测细胞凋亡率及与NS398作用时间的关系；Western blot测定bcl-2蛋白表达。结果不同浓度（0.1～100μmol／L）NS398均可使细胞生长受到抑制；电镜显示细胞呈典型的凋亡形态学变化；琼脂糖凝胶电泳显示凋亡细胞DNA Ladder形成；流式细胞术检测证实细胞凋亡率与NS398作用时间呈明显相关。Western blot检测显示随着NS398作用时间延长，可不同程度地降低bcl-2蛋白表达。结论NS398能抑制人MG-63细胞增殖，诱导细胞凋亡，其作用机制可能与调控bcl-2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.