miR-1腺病毒载体的构建及表达分析

目的构建并鉴定microRNA-1(miR-1)的腺病毒表达载体。方法 PCR扩增含大鼠miR-1前体的DNA片断,并将其克隆到腺病毒穿梭质粒pAdTrack。pAdTrack经PmeI酶切线性化后与腺病毒骨架质粒pAdEasy-1在BJ5183菌中进行同源重组。重组质粒pAdprecusor-miR-1线性化后,转染293A细胞,进行病毒包装,得到重组腺病毒颗粒Ad-miR-1。Ad-miR-1与Ad-GFP病毒转染培养的乳鼠心肌细胞,通过实时荧光定量PCR方法检测miR-1的表达效率。结果基因测序及酶切鉴定证实重组Adprecursor-miR-1腺病毒载体构建成功;腺病毒Ad-miR-1转染心肌细胞后,实时荧光定量PCR方法证实腺病毒Ad-miR-1能够显著提高心肌细胞内miR-1的表达水平。结论利用同源重组的方法构建的miR-1腺病毒能够提高心肌细胞内miR-1的表达水平。     

SHP-2重组腺病毒的包装及对心肌细胞的感染

目的 采用HEK293细胞包装Ad-GFP-SHP-2和Ad-GFP-SHP-2-E76A并扩增Ad-GFP重组腺病毒并感染乳鼠心肌细胞.方法 纯化两种载体;Pac Ⅰ酶切线性化;线性化的载体转染入HEK293细胞进行包装;从病变的HEK293细胞分离重组腺病毒.利用重组的腺病毒感染乳鼠心肌细胞,并在荧光显微镜下观察绿色荧光蛋白的表达.结景 Pac Ⅰ酶切后,琼脂糖凝胶上显示有4.5 kb的条带;转染线性化的重组腺病毒载体人HEK293细胞中,反复冻融HEK293,其上清中含有重组腺病毒,当感染乳鼠心肌细胞感染复数为100时,感染效率大于90%.结论 成功包装重组腺病毒,包装后的腺病毒可高效感染乳鼠心肌细胞.     

腺病毒载体介导的大鼠DNA多聚酶β重组体的构建及其在PC12细胞中的表达

【目的】为探讨DNA多聚酶β在神经细胞损伤中的作用与机制，构建其重组腺病毒载体，并在PC12细胞中表达。【方法】RT—PCR获取大鼠DNA多聚酶β（POLβ）的编码序列，TA克隆测序，酶切POLβ基因并连人穿梭质粒pAdTrack—CMV，电转至含腺病毒pAdeasy骨架质粒的大肠杆菌BJ5183。重组腺病毒质粒（pAd—polp）和Lipofectamine2000转染293细胞，用重组腺病毒感染PC12细胞。【结果】10个TA克隆中有3个克隆的序列与GENE BANK中大鼠POLβ cDNA序列完全一致，同源重组检测时30个克隆中有8个含目标条带。DNA序列正确的POLβ重组腺病毒质粒转染293细胞后，感染Ad—polβ的293及PC12细胞荧光显微镜下可见绿色荧光，重组腺病毒Ad—polβPCR鉴定含目标条带，Ad—polβ感染PC12细胞Western Blot检测到POLβ蛋白表达。【结论】成功构建了大鼠DNA多聚酶β的腺病毒重组体并在PC12细胞中表达     

TNFα-Tumstatin融合基因腺病毒载体的构建及其在人脐带间质干细胞中的表达

目的:构建携带绿色荧光蛋白的TNFα-Tumstatin融合基因腺病毒表达载体,转染人脐带间质干细胞(human umbilical cord mesenchymal stem cells,hUCMSCs)。方法:设计含有GM-CSF信号肽序列和BglⅡ及HindⅢ酶切位点的引物,PCR扩增TNFα-Tumstatin,将扩增产物亚克隆到穿梭质粒pAdTrack-CMV上,重组穿梭质粒经PmeⅠ线性化后转化含有腺病毒骨架质粒pAdEasy-1的BJ5183中同源重组。筛选获得含有融合基因的重组腺病毒质粒,酶切鉴定并测序。重组病毒质粒用PacⅠ酶切线性化后转染293A细胞,经过包装、扩增后感染hUCMSCs并检测细胞内融合基因的表达。结果:重组腺病毒质粒经PCR和PacⅠ酶切鉴定,证实含有TNFα-Tumstatin融合基因,测序结果和设计片段的序列一致。重组腺病毒感染的hUCMSCs表达绿色荧光蛋白和融合基因。结论:成功构建了TNFα-Tumstatin融合基因的腺病毒表达载体,能高效率感染hUCMSCs,为进一步研究融合基因修饰的hUCMSCs抗肿瘤效应奠定了基础。     

miR-1在心肌细胞生长中的调节作用

[摘要] 目的 构建并鉴定microRNA-1(miR-1) 的腺病毒表达载体,并探讨其在心肌肥厚中的介导作用。方法 PCR扩增含大鼠miR-1前体的DNA片段,并将其克隆到腺病毒穿梭质粒pAdTrack。pAdTrack经PmeⅠ酶切线性化后与腺病毒骨架质粒pAdEasy-1在BJ5183菌中进行同源重组。重组质粒pAd-precusor-miR-1线性化后,转染293A细胞,进行病毒包装,得到重组腺病毒颗粒Ad-miR-1。Ad-miR-1与Ad-GFP病毒转染培养的乳鼠心肌细胞,通过实时荧光定量PCR方法检测miR-1的表达效率,并分析心肌细胞表面积及肥厚标志物ANP(Nppa)、β-MHC(myh7)的基因表达变化。结果 基因测序及酶切鉴定证实重组Ad-precursor-miR-1腺病毒载体构建成功,腺病毒Ad-miR-1转染心肌细胞后,实时荧光定量PCR方法证实腺病毒Ad-miR-1能够显著提高心肌细胞内miR-1的表达水平,减小心肌细胞表面积及Nppa、myh7的表达。结论 利用同源重组方法构建的miR-1腺病毒能够提高心肌细胞内miR-1的表达,抑制心肌细胞生长。     

细菌内同源重组制备重组腺病毒及其初步应用

目的通过细菌内同源重组方法构建重组腺病毒。方法质粒pAdTrack酶切线性化后，通过电转化方法转化AdEasier细菌，线性化的腺病毒重组质粒转染293包装细胞后获得重组腺病毒，观察腺病毒感染喉癌细胞Hep-2后的报告基因表达情况及病毒对培养细胞生长的影响。结果构建的重组腺病毒经酶切电泳鉴定正确；扩增的腺病毒转染培养的Hep-2细胞8 h后即开始表达报告基因，48 h后全部细胞均有报告基因表达；该重组的腺病毒对培养Hep-2细胞生长无明显影响。结论通过细菌内同源重组方法构建重组腺病毒，方法简单、成功率高、实验周期短。     

乙肝病毒X基因重组腺病毒载体的构建

目的为了探讨HBx基因与肝癌发生的关系,构建HBx基因重组腺病毒载体。方法应用pAdEasyTM腺病毒载体系统,首先从质粒pCDNA3．1-HBx中酶切得到HBx基因,插入腺病毒穿梭质粒pAdTrack—CMV中,得到pAdTrack—CMV—HBx,将其PmeI酶切线性化后,转到含腺病毒骨架质粒pAdEasy-1的BJ5183感受态细菌中,通过同源重组得到重组腺病毒质粒载体pAd—HBx,经PacⅠ酶切线性化后转染人胚肾293细胞,产生重组腺病毒颗粒Ad—HBx。结果、PCR和酶切鉴定证明重组腺病毒Ad—HBx构建成功,在转染的293细胞中可以观察到绿色荧光蛋白GFP。结论成功构建了携带HBx基因的重组腺病毒载体,为后续研究奠定了基础。     

PSD-95及其突变体的重组腺病毒对皮质神经元的感染

目的构建PSD-95（postsynaptic density-95）及其突变体PSD-95Y523F和PSD-95Y533F（523和533位酪氨酸分别突变成苯丙氨酸）的复制缺陷型重组腺病毒载体,并检测腺病毒颗粒对体外原代培养皮质神经元的感染能力。方法双酶切将PSD-95及其突变体的基因分别从载体peDNA3．1（＋）亚克隆至穿梭载体pAdTrack—CMV中;电穿孔法将穿梭重组体转化到电转感受态细胞BJ5183中,使其与腺病毒骨架载体pAdEasy-1同源重组;同源重组体经PacI酶切线性化,脂质体法转入HEK293H细胞中进行病毒包装;病毒颗粒分别感染HEK293T细胞和原代皮质神经元,荧光检测或免疫印迹方法检测目的蛋白的表达水平。结果经酶切电泳鉴定和序列测定证明同源重组体中含序列正确的目的基因;重组腺病毒颗粒感染HEK293T细胞后,免疫印迹显示有较高水平的目的蛋白表达;重组腺病毒具有感染原代皮质神经元的能力,在未成熟神经元（体外培养5—9天）中感染率低,而在成熟神经元（体外培养13天）中感染率较高。结论成功构建了PSD-95、PSD-95Y523F、PSD-95Y533F的重组腺病毒载体;获得具有感染能力的重组腺病毒颗粒,易于感染成熟的神经元。     

endostatin基因重组腺病毒的构建及在人肺腺癌细胞的表达

目的 利用AdEasy系统构建鼠内皮抑素(ES)基因重组腺病毒Ad.ES,并观察其在人肺腺癌细胞SPCA-1的表达.方法 采用酶切、连接和转化等方法,将质粒pcDNA3.ES中的ES片段插入腺病毒穿梭质粒载体pAdTrack.CMV,构建重组腺病毒穿梭质粒载体pAdTrack.CMV.ES,经Pme Ⅰ酶切线性化后与含腺病毒基因骨架的质粒载体pAdEasy-1在细菌BJ5183内进行同源重组得到腺病毒质粒pAd.ES,重组腺病毒质粒经PacⅠ酶切后,转染人胚肾293细胞包装成腺病毒颗粒Ad.ES,将病毒上清反复感染293细胞获得高滴度病毒,应用氯化铯(CsCl)梯度离心的方法纯化病毒,利用AdEasy系统上的绿色荧光蛋白(GFP)标签测定重组腺病毒的功能滴度.用2 MOI重组腺病毒Ad.ES体外转导SPCA-1细胞48h,流式细胞仪检测GFP表达阳性率,ELISA法测定细胞培养上清液中ES的含量.结果 双酶切证实重组腺病毒穿梭载体pAdTrack.CMV.ES质粒构建正确,卡那霉素抗性筛选和Pac Ⅰ酶切鉴定证实腺病毒重组质粒构建成功.Pac Ⅰ酶切线性化的重组质粒导入293细胞3d,约20%的细胞表达GEP,回收病毒重复感染293细胞,CsCl梯度离心纯化最终获得约5.6×1010TU/mL滴度的重组病毒.Ad.ES体外转导SPCA-1细胞48h后,细胞GFP阳性率为93%,细胞培养上清液中ES的含量较Ad.GFP感染组和阴性对照组明显增加(P＜0.05).结论 应用新型腺病毒载体AdEasy系统可在短期内制备同时表达GFP和ES的重组腺病毒,Ad.ES体外感染人肺腺癌细胞SPCA-1可显著提高ES表达,为进一步研究抗血管生成治疗肺癌奠定了基础.     

大鼠DNA多聚酶β基因克隆及其腺病毒重组体构建

目的 构建大鼠DNA多聚酶β基因克隆及其腺病毒介导的表达载体。方法 提取大鼠脑组织总RNA．用逆转录PCR扩增DNA多聚酶β（POLB）的编码区，与T载体连接，作DNA测序后，酶切POLB基因并连入腺病毒穿梭质粒pAdTraek-CMV，电转至含腺病毒pAdeasy骨架质粒的大肠杆菌BJ5183。酶切鉴定，重组腺病毒质粒（pAd-polb）Lipofectamine2000转染293细胞，用293细胞扩增重组腺病毒。结果 8个TA克隆中有2个克隆的序列与GENE BANK中大鼠POLB cDNA序列完全一致。DNA序列正确的POLB重组腺病毒质粒Ad-polb转染293细胞后，荧光显微镜下可见绿色荧光。结论 用TA克隆和AdEasy系统，成功构建了大鼠DNA多聚酶β的腺病毒重组体。     

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.