外源性PUMA对非小细胞肺癌A549细胞增殖和凋亡的影响

目的探讨外源性p53上调凋亡调制因子(PUMA)对非小细胞肺癌A549细胞增殖、凋亡的影响。方法将肺癌A549细胞分为Control组、空载体组、PUMA组(转染pCEP4-(HA)2-PUMA质粒),DDP组(10μg·mL-1)和PUMA+DDP组(转染pCEP4-(HA)2-PUMA质粒,加10μg·mL-1顺铂)5个组。细胞生存率和凋亡率分别用MTT法和流式细胞仪检测,细胞PUMA、Bax及Bcl-2蛋白表达水平采用Western blot方法检测。结果与Control组比较:PUMA组、DDP组及PUMA+DDP组A549细胞增殖均显著降低(P<0.01),且PUMA+DDP组降低程度最强(P<0.01);凋亡率均显著升高(P<0.01);Bax蛋白水平呈显著性升高(P<0.01),Bcl-2蛋白呈显著性下降(P<0.01)。结论外源性PUMA可抑制肺癌A549细胞增殖,促进凋亡,其机制与增加细胞Bax蛋白表达,降低Bcl-2蛋白表达有关。 更多还原     

二甲双胍联合培美曲塞对人肺腺癌A549细胞增殖及凋亡的影响

目的：研究二甲双胍（metformin,Met）联合培美曲塞（pemetrexed,Pem）对人肺腺癌A549细胞株的增殖及凋亡的影响。方法：不同浓度Met（0、2.5、5.0、10.0、20.0、40.0 mmol/L）、Pem（0、0.5、1.0、2.0、4.0、8.0 μmol/L）48 h下处理A549细胞,CCK?8法检测细胞增殖率并确定Met及Pem的半抑制浓度（IC50）;Met（IC50）及Pem（IC50）单用或联用,不同时间（24、36、48 h）下处理A549细胞,CCK?8法检测细胞增殖率;流式细胞术检测细胞凋亡率;Western blot 检测Bcl?2、Bax、Mcl?1、Noxa蛋白表达。结果：①不同浓度Met及Pem对A549 细胞均有增殖抑制作用,呈剂量依赖性（P＜0.05）;②Met+Pem组作用A549细胞增殖抑制率优于单药组（P＜0.05）,呈时间依赖性（P＜0.05）;③Met+Pem组作用 A549细胞的凋亡率（30.6 ± 0.4）%优于Met组凋亡率（13.3 ± 0.3）%和Pem组凋亡率（12.9 ± 0.1）%（P＜0.05）;④与单药组相比,Met+Pem组明显下调Bcl?2、Mcl?1蛋白表达,上调Bax、Noxa蛋白表达（P＜0.05）。结论：Met联合Pem可抑制A549细胞增殖、诱导凋亡,其效果优于单药,机制可能与下调Bcl?2、Mcl?1蛋白,上调Bax、Noxa蛋白的表达有关。     

巨噬细胞刺激1受体抑制剂BMS777607对肺癌细胞增殖和凋亡的影响

目的：探讨巨噬细胞刺激1受体（MST1R）抑制剂BMS777607对肺癌A549细胞增殖和凋亡的影响,阐明其可能的机制。方法：选择人肺癌A549细胞,不同浓度（1、5、10、15和20μmol·L^-1） BMS777607处理细胞48 h,同时设对照组,采用MTT法检测各组细胞增殖率;不同浓度（1、5、10、15和20μmol·L^-1） BMS777607处理A549细胞14 d,同时设对照组,采用克隆形成实验观察各组细胞克隆形成情况并检测各组细胞增殖率;不同浓度（10和20μmol·L^-1） BMS777607处理A549细胞24h,同时设对照组,采用EdU掺入法检测各组细胞中EdU阳性细胞率;不同浓度（1、5、10、15和20μmol·L^-1） BMS777607处理A549细胞48h,同时设对照组,采用流式细胞术检测各组细胞凋亡率;应用Western blotting法检测各组细胞中蛋白激酶B（AKT）、磷酸化AKT（p-AKT）、细胞外调节蛋白激酶（ERK）、磷酸化ERK（p-ERK）、聚酰苷二磷酸核糖聚合酶（PARP）、活化型PARP（Cleaved-PARP）、含半胱氨酸的天冬氨酸蛋白水解酶9（Caspase 9）和活化型Caspase9（Cleaved-Caspase9）蛋白表达水平。结果：MTT实验,与对照组比较,不同浓度BMS777607组细胞增殖率明显降低（P<0.05或P<0.01）,且呈浓度和时间依赖性。克隆形成实验,与对照组比较,10μmol·L^-1BMS777607组细胞克隆形成数量明显减少,20μmol·L^-1BMS777607组细胞几乎无克隆形成;与对照组比较,不同浓度BMS777607组细胞增殖率明显降低（P<0.05或P<0.01）。EdU掺入法实验,与对照组比较,10和20μmol·L^-1BMS777607组细胞中EdU阳性细胞率均明显降低（P<0.05或P<0.01）。双染流式细胞术检测,与对照组比较,10、15和20μmol·L^-1 BMS777607组A549细胞凋亡率明显升高（P<0.05）。Western blotting法检测,与对照组比较,不同浓度BMS777607组细胞中p-AKT和p-ERK蛋白表达水平明显降低（P<0.05）,Cleaved-PARP和Cleaved-Caspase9蛋白表达水平明显升高（P<0.05）。结论：MST1R抑制剂BMS777607能够抑制肺癌A549细胞的增殖,并诱导其凋亡,其机制可能与其抑制p-AKT、p-ERK表达和促进PARP、Caspase9表达有关。     

eIF5A-2下调对人肺癌细胞株A549/DDP耐药及自噬的影响

目的 探讨沉默真核翻译起始因子5A-2（eIF5A-2）对人肺癌细胞株A549/DDP耐药及自噬的影响。方法 体外培养人肺癌细胞株A549、A549/DDP,转染细胞A549/DDP,细胞分为eIF5A-2 SiRNA组、阴性对照组（NC组）及空白对照组,另以A549细胞为正常对照组。病毒感染72 h后,采用实时荧光定量PCR（qRT-PCR）检测细胞中eIF5A-2-mRNA表达水平,MTT法检测细胞DDP作用下A549/DDP细胞的耐药性,流式细胞术检测细胞的凋亡率,单酰戊二胺(MDC)染色检测细胞自噬水平,蛋白免疫印记（Western blot）法检测eIF5A-2、LC3Ⅱ及Beclin-1蛋白相对表达水平。结果 与正常对照组相比,空白对照组、NC组A549/DDP细胞eIF5A-2 mRNA相对表达水平显著升高（均P＜0.05）;与空白对照组、NC组相比,eIF5A-2-SiRNA组细胞凋亡率显著升高,细胞IC50、自噬小体数目、eIF5A-2、LC3Ⅱ及Beclin-1蛋白相对表达水平显著降低（均P＜0.05）。〖HTH〗结论eIF5A-2下调可降低人肺癌细胞株A549/DDP耐药性,可能与下调LC3Ⅱ、Beclin-1表达,抑制自噬作用有关。     

EGCG对肺癌A549/DDP细胞药物敏感性的影响及机制

目的探讨EGCG对肺癌耐药细胞株A549/DDP对顺铂敏感性的影响及作用机制。方法MTT法检测EGCG对A549/DDP细胞药物敏感性的影响。AO/EB染色法检测EGCG联合顺铂处理A549/DDP细胞前后凋亡的形态学改变;流式细胞术检测细胞凋亡率;Western Blot方法观察EGCG作用前后耐药蛋白GST-π、Survivin表达的变化。结果MTT比色法显示20、40、60μg/mL EGCG均可增加细胞对顺铂的敏感性;荧光显微镜下观察到EGCG处理后细胞体积缩小,核固缩,呈典型的凋亡形态学改变;Western Blot方法检测发现,不同浓度的EGCG处理细胞24 h后GST-π、Survivin蛋白表达均下调。流式细胞术显示,20、40、60μg/mL EGCG联合顺铂处理细胞24 h后,凋亡率逐渐增加,说明EGCG联合顺铂能够促进肺癌耐药细胞株A549/DDP凋亡。结论EGCG能够增加A549/DDP细胞对顺铂的敏感性,其机制可能与降低GST-π、Survivin蛋白表达从而诱导细胞凋亡有关。     

CircBIRC6调节miR-126-5p/JARID2轴对非小细胞肺癌细胞顺铂耐药性的影响

目的：探讨环状RNA BIRC6(CircBIRC6)对非小细胞肺癌(NSCLC)细胞(A549)顺铂(DDP)耐药性的影响。方法：RT-qPCR法检测DDP耐药及敏感肺癌组织与细胞中CircBIRC6表达,体外培养人NSCLC细胞株A549及DDP耐药细胞A549/DDP,将A549/DDP细胞分为Control组、pcDNA组、pcBIRC6组、si-CircBIRC6组、si-NC组、si-BIRC6+inhibitor NC组,si-BIRC6+miR-126-5p inhibitor组。RT-qPCR检测CircBIRC6、miR-126-5p表达;CCK-8法检测细胞增殖及对DDP的IC₅₀值;流式细胞术检测细胞凋亡;Western blot检测JARID2、Cyclin D1、P21、P-gp蛋白表达;双荧光素酶报告基因实验验证CircBIRC6、JARID2与miR-126-5p的靶向关系。结果：与DDP敏感肺癌组织相比,CircBIRC6在DDP耐药肺癌组织中表达水平显著升高,与A549细胞相比,A549/DDP细胞中CircBIRC6表达水平及...     

长非编码RNA BANCR逆转非小细胞肺癌细胞株顺铂耐药的研究

目的:研究长非编码RNA BANCR对人非小细胞肺癌耐顺铂细胞株A549/DDP耐药性的影响及其可能的作用机制?方法:应用实时荧光定量PCR法(qRT-PCR)检测耐顺铂细胞株A549/DDP及其亲本细胞株A549中BANCR的表达差异,发现BANCR在A549/DDP细胞中显著低表达?在A549/DDP细胞中过表达BANCR,分别应用MTT法?克隆形成实验?流式细胞术检测过表达后A549/DDP细胞对顺铂药物敏感性,细胞增殖能力,联合顺铂处理后细胞凋亡变化;Western blot检测过表达BANCR后A549/DDP细胞p53的表达变化?结果:BANCR在A549/DDP细胞中的表达量显著低于A549细胞(P < 0.05),在A549/DDP细胞中过表达BANCR可产生以下效应:相较于对照组,顺铂对A549/DDP/BANCR细胞的半数抑制浓度(half inhibition concentration,IC50)减低(P < 0.05),A549/DDP/BANCR细胞的增殖能力减弱,A549/DDP/BANCR经过顺铂处理后细胞凋亡增多(P < 0.05)?Western blot结果显示,与空白对照组比较,过表达BANCR的 A549/DDP细胞p53表达水平明显升高?结论:BANCR可能通过诱导细胞凋亡,抑制细胞增殖,上调p53蛋白表达而逆转 A549/DDP细胞对DDP的耐药性?     

牛磺酸对人肺癌细胞株A549细胞凋亡的影响

探讨牛磺酸（Tau）对人肺癌细胞株A549细胞凋亡的作用及其初步机制。方法 将A549细胞分为6组:Control组（正常对照组,未给予任何药物处理）和Tau 1组(给予Tau 10 mmol·L-1)、Tau 2组(给予Tau20mmol·L-1)、Tau 3组(给予Tau 40 mmol·L-1)、Tau 4组(给予Tau 80 mmol·L-1)、Tau 5组(给予Tau160mmol·L-1);阳性对照组DDP 4mg·L-1,作用时间分别为24、48、72h。应用MTT比色法检测人肺癌细胞株A549的细胞增殖,流式细胞术检测人肺癌细胞株A549的细胞凋亡率,分光光度法检测Caspase-9、Caspase-3的活性,免疫印迹法检测p53正向细胞凋亡调控因子（PUMA）的水平及Bax蛋白、Bcl-2蛋白的表达水平。结果Tau能够以时间剂量依赖方式来抑制A549细胞增殖,并显著增加A549细胞凋亡率。Tau可以明显增加A549细胞内Caspase-9、Caspase-3的活性,以及诱导A549细胞内PUMA、Bax蛋白表达上调,Bcl-2蛋白表达下调。Tau对人胚肾细胞293T的细胞活性无明显影响。结论 Tau对人肺癌细胞株A549有增殖抑制和凋亡诱导的作用,其机制可能是Tau通过上调PUMA、Bax表达及下调Bcl-2表达,进而增加Caspase-9、Caspase-3的活性来诱导A549细胞发生凋亡。     

甘草内生菌联合顺铂对A549细胞的增殖及凋亡的影响

目的：探讨甘草内生菌JTZB55联合顺铂对人肺癌A549细胞增殖和凋亡的影响及其可能机制。方法：MTT法检测JTZB55或/和顺铂对A549细胞存活率的影响,根据协同指数筛选出后续实验浓度,将A549细胞分为正常对照组、2μg/mL顺铂组、800μg/mL JTZB55组、2μg/mL顺铂+800μg/mL JTZB55组;流式细胞术检测各组药物对A549细胞凋亡的影响;Western blot法检测各组药物处理后细胞线粒体凋亡及内质网应激途径相关蛋白的表达水平。结果：MTT结果显示,顺铂及JTZB55作用于A549细胞后,细胞存活率显著降低;与顺铂组相比,联合组细胞存活率显著降低（P<0.05）,且800μg/mL JTZB55与2μg/mL顺铂联用的协同指数最高;流式细胞术结果显示,JTZB55及顺铂均能促进A549细胞凋亡（P<0.01）,两药联合组细胞凋亡率显著增高（P<0.01）;Western blot实验结果表明,顺铂联合JTZB55能显著降低B细胞淋巴瘤/白血病-2蛋白（B cell lymphoma/leukemia-2,Bcl-2）蛋白的表达,上调...     

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.