锌指蛋白A20基因抑制缺氧诱导内皮细胞CD54的表达

【目的】探讨外源性锌指蛋白基因A20对缺氧诱导内皮细胞黏附分子CD54表达的影响。【方法】培养原代人脐静脉内皮细胞，将细胞分组建立缺氧模型；采用DOTAP脂质体介导pcDNA3．1EHA20质粒转染培养的内皮细胞，筛选抗G418的阳性克隆，经免疫荧光鉴定A20基因的表达；采用免疫组化和原位杂交检测内皮细胞CD54的表达。【结果】A20基因在经G418筛选后的内皮细胞中得到高效表达。缺氧能诱导人内皮细胞CD54高表达。外源性A20基因能抑制75％以上由缺氧诱导的内皮细胞CD54表达，两者间相差明显（P〈0．01）。【结论】外源性A20基因能够显著抑制缺氧诱导的内皮细胞活化，有效抑制CD54的表达，可能在内皮细胞缺氧损伤中具有保护作用。     

转染锌指蛋白基因A20抑制内毒素诱导的内皮细胞IL-8表达的研究

目的探讨转染外源性锌指蛋白基因A20对内毒素诱导的内皮细胞白细胞介素-8(IL-8)表达的影响.方法DOTAP脂质体介导pcDNA3.1EHA20质粒转染人脐静脉内皮细胞,经G418筛选,免疫荧光检测A20基因的表达,双抗夹心EIISA法检测内皮细胞分泌IL-8的含量变化.结果A20基因在经G418筛选后的内皮细胞中得到高效表达;内毒素能刺激人内皮细胞分泌IL-8;A20基因能减少70%以上内毒素诱导的内皮细胞IL-8的分泌,两者间相差显著(P＜0.05).结论转染外源性A20基因能够显著抑制内毒素诱导的内皮细胞活化,有助于炎症的治疗.     

RASSF1A基因转染对人肺腺癌细胞株A549增殖的抑制作用

目的：观察外源性RASSF1A基因对人肺腺癌细胞A549增殖及NF- κB亚单位P65表达的影响。方法：利用脂质体转染技术将真核表达重组体pcDNA3.0-RASSF1A质粒和空载体pcDNA3.0质粒分别导入A549细胞，经G418筛选后获得稳定转染细胞克隆，Western blotting检测RASSF1A基因表达。采用MTT(四甲基偶氮唑盐)法、流式细胞仪分析转染细胞的生物学行为。 RT-PCR和Western blotting检测基因转染对P65表达的影响。结果：经脂质体转染和筛选，建立了稳定表达RASSF1A基因的A549细胞系。与未转染组和转染空白载体组比较，转染RASSF1A基因的细胞生长速度明显减慢（P<0.05），细胞周期中G1/G0期比例明显增加（P<0.05），而S期比例减少；转染组细胞核内P65蛋白表达明显降低（P<0.05），而全细胞P65蛋白及mRNA表达未见明显变化。结论：RASSF1A基因可能通过抑制P65活性而抑制人肺腺癌细胞A549的生长。     

canstatin基因在体外培养血管内皮细胞中的表达及其意义

目的 探讨canstatin基因通过电穿孔法在体外培养人脐静脉内皮细胞中的表达及对其生长与凋亡的影响.方法 将canstatin基因通过电穿孔法转染人脐静脉内皮细胞HUV-ECC,行G418筛选获得转基因细胞克隆.用RT-PCR检测canstatin在转基因细胞mRNA中的表达,以流式细胞仪分析细胞周期,并比较转基因和未转基因细胞的生长特性.结果 检测到canstatin在转染人脐静脉内皮细胞中的表达,canstatin基因转染内皮细胞组的凋亡率(16.90%)高于空载体组(1.47%)和亲代细胞组(2.85%)(P＜0.01),转染细胞生长明显受抑.结论 canstatin能特异地抑制血管内皮细胞增殖,并诱导细胞凋亡.     

iNOS转基因在血管平滑肌细胞的表达

目的 研究逆转录病毒介导诱导型一氧化氮合酶（iNOS）基因在体外培养的大鼠主动脉平滑肌细胞（VSMC）中的表达。方法 通过脂质体介导的DNA转染法将PLXSNiNOS导入PA317细胞中；经G418筛选获得抗性克隆；用NIH3T3细胞测定病毒上清滴度；将病毒上清转染体外培养的VSMC；采用RT-PCR、Western blot检测VSMC内iNOS mRNA和蛋白的表达。结果 PLXSNiNOS转染体外培养的VSMC48h后，在VSMC内可检测到外源性iNOS mRNA和蛋白；而用PLXSN转染体外培养的VSMC48h后未能检测到外源性iNOS mRNA和蛋白表达。结论 逆转录病毒介导iN0s基因可高效转染体外培养的VSMC，并在细胞内表达iNOS蛋白。     

转化生长因子β1基因促进人平滑肌细胞与内皮细胞黏附

目的探讨TGF-β1基因作用于平滑肌细胞从而促进内皮细胞黏附的作用。方法用单价阳离子脂质体转染试剂DOTAP转染pMAMneo TGF-β1于原代培养的平滑肌细胞,经G418筛选。检测转染pMAMneo TGF-β1和转染pMAMneo的平滑肌细胞黏附内皮细胞的情况。结果经G418筛选,转染pMAMneo TGF-β1组转化生长因子TGF-β1基因在平滑肌细胞得到有效表达,内皮黏附实验表明转染pMAMneo TGF-β1组平滑肌细胞表面有大量内皮细胞黏附[(32±2)/高倍视野],而对照组平滑肌细胞仅有少量内皮细胞黏附[(11±1)/高倍视野],其与转染pMAMneo组相比,差异显著(P<0.01)。结论 TGF-β1基因能有效作用于血管平滑肌细胞从而促进内皮细胞黏附,在血管再生中具有重要作用。     

NDRG2蛋白的毕赤酵母可溶表达与纯化

目的：酵母表达并纯化可溶性NDRG2蛋白。方法：从pRSET-A-ndrg2重组质粒中扩增出6his-ndrg2融合基因，克隆入酵母表达载体pPIC3.5K；酵母重组表达载体pPIC3.5K-6his-ndrg2电转化入毕赤酵母GS115，并进行营养缺陷筛选和G418抗性筛选；对高拷贝整合的重组酵母表达菌株诱导表达，可溶性表达产物经Ni-NTA亲合层析纯化。结果：构建得到酵母融合重组表达载体pPIC3.5K-6his-ndrg2；经G418浓度梯度筛选得到串联整合16个重组表达载体以上的重组酵母表达菌株；诱导后表达得到6his-NDRG2融合蛋白，并成功纯化得到可溶性表达产物。结论：表达并纯化得到可溶性NDRG2蛋白，为进一步研究NDRG2的结构与功能打下了必要的基础。     

p53基因治疗与放疗联合作用对卵巢癌细胞的杀伤效果

目的：探讨外源性p53基因转染与放疗联合作用对人卵巢癌细胞的杀伤效果。方法：用脂质体介导的转染技术，将人野生型p53基因的真核表达载体及不含p53基因的空载体分别导入不表达p53的卵巢癌SKOV-3细胞中，经G418筛选，Northern blot及Western blot鉴定后，观察X射线照射对其集落形成的影响。结果：外源性p53基因在转染细胞中有效表达。经X射线照射后，转染p53基因组的SKOV-3细胞的集落形成数与转染空载体组及未转染的SKOV-3细胞组相比，明显降低。结论：外源性p53基因能增加卵巢癌细胞对放射线的敏感性，2者联合作用能更有效地杀灭肿瘤细胞。     

流式细胞术辅助筛选和纯化人缺氧诱导因子-1α基因沉默肝癌细胞株

目的利用流式细胞术（FCM）协助筛选、纯化RNA干扰（RNAi）效率高的人缺氧诱导因子1-α（HIF-1α）基因沉默肝癌细胞株.方法选择带Neor及GFP基因的质粒pGenesil-1.1构建HIF-1α靶向小干扰RNA（siRNA）重组表达载体,转染人肝癌细胞株SMMC7721.首先用G418筛选,然后用FCM检测出常氧、缺氧条件下HIF-1α蛋白表达抑制效率最高的转基因细胞株.根据FCM可分选GFP阳性细胞这一特点,进一步用流式细胞分选仪分选纯化转基因细胞,最后用PCR和免疫组化方法鉴定纯化细胞株的HIF-1α干扰效率.结果单用G418筛选HIF-1α干扰组细胞最高筛选效率为32.9%,FCM检测HIF-1α蛋白抑制率为78.7%～92.8%;合并使用G418和FCM分选纯化后,最佳HIF-1α干扰组筛选效率达94.4%,常氧、缺氧条件下对HIF-1αmRNA表达抑制率分别为95.5%、85.2%.结论合并使用G418及FCM分选纯化得到了高RNAi效率的人HIF-1α基因沉默肝癌细胞株,为进一步研究HIF-1α与肝癌关系及靶向HIF-1α的肝癌基因治疗提供了实验基础.     

抑癌基因LKB1对肺癌细胞血管内皮生长因子的表达调控

目的：了解抑癌基因LKBl对肺癌细胞A549血管内皮生长因子（vascular endothelial growth factor，VEGF）的调控作用。方法：应用巢式PCR方法扩增LKB1基因编码区，构建LKBl的真核表达载体并以脂质体法转染A549细胞，G418筛选稳定表达细胞株；RT-PCR及Western印迹法检测LKBl、SPl和VEGF在A549细胞中的表达变化；siRNA技术干扰转录因子SPl的表达，RT-PCR及Western印迹法检测SPl和VEGF的表达变化。结果：外源性LKBl在A549细胞中稳定表达；LKBl蛋白下调SPl和VEGF的表达；SPl可被特异性siRNA分子有效抑制，siRNA介导的SPl沉默伴随VEGF表达下调。结论：LKBl可能通过负调控转录因子SPl的表达从而调控VEGF的表达。     

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.