白及须根醇提物诱导肺腺癌细胞A549凋亡研究

目的研究白及须根醇提物（Alcohol extract of fibrous root part of Bletilla striata,AEFB）诱导肺腺癌细胞A549凋亡及相关作用机制。方法运用MTs、hoechst-PI双染及流式细胞术检测白及须根醇提物对A549细胞的增殖及凋亡影响;二维水平的细胞迁移检测白及须根醇提物对A549细胞转移的影响;RT-PCR法检测白及须根醇提物对肺腺癌细胞凋亡和转移相关基因bcl-2、bax、ICAM-1 mRNA的影响。结果白及须根醇提物能够抑制肺腺癌细胞的增殖,并且有浓度效应,随着药物浓度的提高,bcl-2、ICAM-1 mRNA表达下调,bax mRNA表达上调。结论白及须根醇提物能够明显的抑制肺腺癌细胞的生长作用,具有明显的促进肿瘤细胞凋亡作用和抑制肿瘤细胞的转移作用,其机制可能是通过下调bcl-2、ICAM-1及上调bax的表达相关。     

生长抑制因子5抑制肺癌细胞增殖作用的研究

目的探讨生长抑制因子5(ING5)抑制肺癌细胞增殖的作用。方法采用慢病毒介导的基因转染方法建立A549细胞ING5高表达细胞系A549-ING5-OE和A549细胞空质粒对照细胞系A549-control。采用细胞增殖实验和克隆形成实验观察ING5过表达对肺癌A549细胞增殖能力的影响;采用皮下接种方法建立裸鼠皮下移植瘤模型,观察ING5对裸鼠皮下成瘤能力及肿瘤体积大小的影响。结果本实验成功构建了肺癌A549-ING5过表达细胞系,与A549-control比较,细胞系A549-ING5-OE中ING5表达显著增高;增殖实验结果显示ING5高表达显著抑制了肺癌细胞的增殖能力;克隆形成实验结果显示细胞系A549-ING5-OE中ING5高表达的肺癌细胞克隆形成能力明显低于A549-control肺癌细胞(P<0.01);裸鼠在体水平研究结果显示ING5高表达可以抑制裸鼠皮下成瘤及移植瘤的生长。结论 ING5可以抑制肺癌细胞的增殖,为临床治疗肺癌提供新的治疗靶点。     

PKCα反义核酸对肺癌A549 细胞增殖的影响

目的 探讨聚乙烯亚胺(PEI)介导的人蛋白激酶Cα(PKCα)基因反义寡核苷酸(ASODN)对人肺癌A549细胞生长增殖及PKCα基因表达的影响.方法 以PEI介导PKCα ASODN,随机寡核苷酸(RODN)分别转染A549细胞,采用WST法和克隆形成抑制实验分析细胞生长增殖抑制效果;RT-PCR检测PKcd mRNA的表达水平;Western blotting检测PKCα蛋白的表达水平.结果 PEI介导的PKCaASODN转染A549细胞后,细胞牛长增殖和克隆形成均受到抑制(P<0.05),并呈浓度依赖关系,其抑制率明显高于PEI或PEI介导的RODN组;RT-PCR和Westernblotting结果均表明:PEI 介导的PKCαASODN转染A549细胞能明显抑制PKCα的表达,与空白对照组、PEI或PEI介导的RODN转染组相比,有统计学差异(P<0.05).结论 PEI介导的PKCα反义核酸能下调PKCα基因的表达,显著抑制A549细胞生长和增殖.     

千金子二萜醇衍生物抗非小细胞肺癌的作用及机制

目的：非小细胞肺癌占所有肺癌的85%,具有较高的发病率和病死率。非小细胞肺癌的治疗研究和新药开发迫在眉睫。本研究主要探讨千金子二萜醇衍生物的活性及其抑制非小细胞肺癌细胞生长的作用机制。方法：以千金子二萜醇为原料合成3个千金子二萜醇衍生物,采用磁共振验证结构;采用MTT法检测上述衍生物对非小细胞肺癌细胞(A549和H1299细胞)增殖活力的影响,筛选出活性最佳的化合物进行后续实验。集落形成、划痕、Transwell实验分别用于检测A549和H1299细胞的体外增殖、迁移和侵袭能力,实时荧光定量PCR(real-time RT-PCR)和蛋白质印迹法用于检测A549细胞中E-cadherin、N-cadherin、β-catenin、MMP2等mRNA和蛋白质的表达水平。结果：3个千金子二萜醇衍生物均呈剂量依赖性地抑制A549和H1299细胞的生长,且对正常细胞Beas-2B和16HBE细胞抑制作用较弱,具有一定的选择性杀伤作用。其中C-5苯甲酰化千金子二萜醇的活性最佳,作为后续实验的药物。与对照组相比,处理组的A549和H1299细胞克隆团明显变小且数目明显减少,相对迁移率明显降低,侵袭...     

不同菱角壳提取物抑制肺癌A549细胞生长的研究

目的 研究不同菱壳水和乙醇提取物的抗癌活性.方法 采用Folin比色法测定不同品种菱壳提取物中多酚的含量,通过MTT法测定二角菱壳、四角菱壳的水提取物、醇提取物对肺癌A549细胞生长抑制作用.结果 四角菱壳多酚含量高于二角菱壳,醇提物多酚含量高于水提物;二角菱壳醇提取物对肺癌A549细胞的抑制率高于水提物,差异具有统计学意义(P＜0.01);四角菱壳水提物对抑制率高于二角菱壳水提物肺癌A549细胞的生长,差异具有统计学意义(P＜0.01).结论 菱角壳提取物对肺癌A549细胞生长具有较强的抑制作用,且菱角壳的醇提取物优于水提取物,四菱角壳优于二角菱壳.     

叶下珠醇提物对人胃癌细胞MKN28的抑制作用

目的体外实验初步探讨叶下珠醇提物对人胃癌细胞MKN28生长的影响。方法通过集落形成试验观察叶下珠醇提物对人胃癌细胞MKN28集落形成的影响;将不同浓度叶下珠醇提物作用于MKN28细胞,倒置显微镜下观察细胞形态变化,MTT法测定叶下珠醇提物对MKN28细胞的增殖抑制率;流式细胞仪检测叶下珠醇提物作用48 h后MKN28细胞的凋亡情况。结果在2 mg/mL和1 mg/mL 2个浓度下叶下珠醇提物对MKN28胃癌细胞集落形成具有不同程度的抑制作用,浓度大者,抑制作用更强。MTT法测定细胞增殖抑制率结果表明,叶下珠醇提物对MKN28细胞增殖有抑制作用,其抑制效应具有浓度和时间依赖性。流式细胞检测提示叶下珠醇提物能诱导人胃癌细胞MKN28发生凋亡。结论叶下珠醇提物能抑制人胃癌细胞MKN28增殖,凋亡是其作用机制之一。     

转录因子Nrf3调节肺癌A549细胞增殖的作用

目的探究转录因子Nrf3对肺癌A549细胞增殖的作用。方法利用慢病毒技术构建Nrf3敲降的肺癌A549细胞,嘌呤霉素筛选并通过RT-qPCR和Western Blot实验验证构建的细胞。采用CCK8、平板克隆形成和Ed U实验分析敲降Nrf3对A549细胞增殖能力的影响。结果 RT-qPCR和Western blot实验结果证实成功获得稳定干扰Nrf3的A549细胞。CCK8、平板克隆形成、Ed U实验均表明干扰Nrf3抑制A549细胞增殖。结论转录因子Nrf3在调节肺癌A549细胞的增殖行为中发挥重要作用,敲降Nrf3抑制其增殖。     

三氧化二砷联合紫杉醇对A549增殖的影响及机制研究

目的研究三氧化二砷联合紫杉醇对体外培养的肺腺癌A549细胞株的增殖抑制作用及其机制。方法MTT法、克隆实验检测不同干预方式对A549细胞增殖能力的影响;ELISA法检测不同干预方式细胞上清液中COX-2、VEGF含量。结果三氧化二砷和紫杉醇两药联合干预A549时,能抑制A549细胞的增殖并下调COX-2、VEGF表达,与三氧化二砷或紫杉醇单独用药组相比抑制A549细胞增殖差异有统计学意义(P<0.01),并且具有时间依赖性。结论三氧化二砷联合紫杉醇能有效抑制体外培养的人肺腺癌A549细胞株,其机制与下调COX-2和VEGF表达有关。     

溪黄草对circ_0091579/miR-515-5p、肺癌细胞A549增殖及凋亡的影响

目的探讨溪黄草对circ_0091579/miR-515-5p及肺癌细胞A549增殖和凋亡的影响。 方法将肺癌A549细胞分为对照组、溪黄草(20、40、80 mg/L)组、si-circ_0091579组、si-NC组、pcDNA-circ_0091579组、pcDNA组、溪黄草+pcDNA-circ_0091579组。CCK-8、平板克隆实验、流式细胞术检测A549细胞抑制率、克隆形成数以及凋亡率。qRT-PCR检测circ_0091579和miR-515-5p表达。双荧光素酶报告实验验证circ_0091579和miR-515-5p相互作用。 结果溪黄草显著降低A549细胞的增殖和克隆形成能力,促进细胞凋亡,诱导cleaved-Caspase-3表达上调及circ_0091579下调,且呈质量浓度依赖性。下调circ_0091579可降低A549细胞的增殖和克隆形成能力,促进细胞凋亡,诱导cleaved-Caspase-3表达上调。上调circ_0091579可逆转溪黄草对A549细胞的增殖抑制和凋亡促进功能。circ_0091579和miR-515-5p直接特异性结合。 结论溪黄草可抑制肺癌细胞A549增殖,诱导其凋亡,其机制与下调circ_0091579/miR-515-5p途径有关。     

IGF1R-shRNA重组慢病毒的构建及对肺癌A549细胞增殖的影响

目的 构建IGF1R基因的shRNA慢病毒载体,转染A549细胞鉴定沉默效率,观察其对A549细胞增殖能力的影响.方法 设计IGF1R干扰序列,与pGC-LV慢病毒载体重组形成shRNA表达载体,包装shRNA慢病毒颗粒,感染A549细胞,应用RT-PCR和Western blot检测IGF1R干扰效果;细胞生长抑制实验、克隆形成实验及细胞周期检测评价其对A549细胞增殖的影响. 结果 成功构建了IGF1R-shRNA重组慢病毒并高效感染A549细胞,IGF1R mRNA及蛋白表达量分别下降74.51％,70.53％;细胞群体倍增时间显著延长,克隆形成能力显著降低,细胞周期阻滞于G0/G1期. 结论 本研究构建的重组慢病毒能显著抑制IGF1R表达,抑制A549细胞增殖.     

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.