小鼠miRNA-203慢病毒过表达载体的构建及病毒包装与滴度测定

目的构建microRNA-203（miR-203）过表达慢病毒载体,并对其进行病毒包装、鉴定与滴度测定。方法利用化学合成miR-203发夹前体结构RNA（small hairpin RNAs,hRNA）,并将其克隆入pSicoR质粒中,经双酶切及测序鉴定;利用脂质体将鉴定的阳性重组pSicoR-miR-203表达载体、pCMV-VSV-G和pCMV-dR8.91三个质粒共转染到HEK-293T细胞,分别在48h和72h收获上清,包装产生慢病毒。将所得病毒悬液梯度稀释后感染293T细胞,检测病毒滴度,并将制备的病毒颗粒尾静脉注射Balb/c小鼠,检测miR-203在小鼠体内的表达与分布情况。结果酶切及测序结果证明成功构建了pSicoR-miR-203重组质粒,并成功的包装成慢病毒,病毒滴度为5×107 TU.mL-1。重组病毒在Balb/c小鼠肝脏、脾脏、肺脏、肾脏均有表达。结论成功构建miR-203慢病毒表达载体,获得高效表达miR-203的慢病毒颗粒,为miR-203靶基因筛选及其功能的研究奠定了基础。     

小鼠microRNA-21慢病毒抑制载体的构建及鉴定

目的构建microRNA-21(miR-21)慢病毒抑制载体,为研究miR-21在小鼠体内的功能及作用机制打下基础。方法利用miR-21前体并将其克隆入LV3pGLV-H1-GFP质粒中,经酶切及测序鉴定,利用脂质体将鉴定的阳性重组LV3pGLV-H1-GFP-miR-21抑制载体、PG-P1-VSVG和pCMV-dR3个质粒转染到HEK-293T细胞,将所得病毒感染293T细胞,检测病毒滴度,并将制备的病毒颗粒感染乳鼠心肌细胞和尾静脉注射小鼠,检测miR-21在小鼠体内的表达。结果酶切及测序结果证明成功构建了LV3pGLV-H1-GFP-miR-21重组质粒,并成功包装成慢病毒,病毒滴度为2.4×109TU/ml,重组病毒成功感染心肌细胞,同时在Balb/c小鼠心脏有表达。结论成功构建miR-21慢病毒抑制载体,获得高效表达miR-21的慢病毒颗粒,为miR-21的进一步研究奠定了基础。     

LOX-shRNA慢病毒表达载体的构建与鉴定

目的 构建LOX-shRNA的慢病毒表达载体及其病毒包装鉴定。方法 利用Oligo Designer 3.0,根据人LOX基因序列设计shRNA,并合成包含正、反义靶序列的互补DNA链,退火后插入LOX表达载体中,构建shRNA表达质粒,并转化至E.coli TOP10感受态细胞,抽提质粒后进行测序。将重组质粒转染HEK-293T细胞,应用RT-PCR检测各组LOX基因mRNA的表达水平,筛选出最有效的LOX-shRNA后,通过LipofectAMINETM2000介导转染293T细胞,对慢病毒进行包装并测定慢病毒滴度。结果 利用慢病毒介导将重组质粒LOX-shRNA-3024高效转导入HEK-293T细胞并稳定表达。荧光显微镜显示,转染24h后,HEK-293T细胞即开始发出绿色荧光;72h后,有大量荧光表达,而对照组未转染质粒的HEK-293T细胞不表达,可见慢病毒载体被成功转染。LOX-3024重组慢病毒的滴度为2×10¹⁰TU/ml。结论 成功构建LOX-shRNA慢病毒表达载体,并稳定转染HEK-293T细胞,为研究LOX对人阴道壁成纤维细胞生物学行为的影响提供了实验基础。     

微小RNA miR-26a的克隆及其慢病毒表达载体的构建

目的 克隆微小RNA hsa-miR-26a并构建其慢病毒表达载体.方法 将PCR扩增得到的miR-26a前体序列和pIVTHM载体经双酶切后连接产生pIVTHM-miR-26a慢病毒表达载体,双酶切后测序鉴定,筛选阳性克隆.用pIVTHM-miR-26a、psPAχ2和pMD2.G 3质粒共转染包装细胞293FT,包装产生慢病毒.以293FT细胞绿色荧光蛋白(green fluorescent protein,GFP)的表达水平测定病毒滴度.结果 经双酶切鉴定和测序证实,成功构建了miR-26a的慢病毒表达载体pIVTHM-miR-26a.倒置荧光显微镜下观察可见包装细胞293FT呈绿色荧光,并测得病毒滴度为5×105TU/ml.成功构建hsa-miR-26a的慢病毒表达载体.为深入研究miR-26a的生物学功能奠定了基础.     

TGF-β1基因重组慢病毒载体的构建和鉴定

目的构建携带TGF-β1的重组慢病毒表达载体,为TGF-β1基因转染骨髓间充质细胞(BMSCs)的研究奠定基础。方法利用基因克隆技术将TGF-β1基因定向克隆至慢病毒载体,构建TGF-β1基因重组质粒,并进行PCR、酶切和测序鉴定,并通过脂质体LP2000的介导慢病毒293T细胞。结果采用基因克隆技术构建的TGF-β1重组慢病毒经PCR、酶切及测序鉴定完全正确,转染293T细胞能够正确表达。结论基因克隆技术能成功构建TGF-β1重组慢病毒载体,转染293T细胞后能够正确表达,为TGF-β1基因转染骨髓间充质细胞(BMSCs)诱导免疫移植耐受的研究奠定基础。     

Hsa-mir-196b慢病毒表达载体的构建及鉴定

目的 构建Has-mir-196b慢病毒表达载体并对其进行鉴定.方法 以正常人外周血DNA为模板,PCR扩增得到目的基因.通过却Hpa I/Xho I双酶切及其后的连接将其插入Lentilox 3.7(pLL-3.7)质粒中.PCR筛选阳性克隆,测序鉴定.用pLL-3.7-mir-196b、pCMV-VSV-G和pCMV-dR8.91三质粒系统共感染HEK-293FT细胞,包装生产慢病毒.将所得病毒悬液梯度稀释后感染HEK293FT细胞,以检测病毒滴度,并用实时定量PCR检测慢病毒感染后Has-mir-196b的表达变化.结果 PCR及测序结果证明成功构建了pLL-3.7-mir-196b重组质粒.所得慢病毒上清滴度为(7.2±101)×107TU/ml.感染慢病毒的239FT细胞中,Has-mir-196b的表达量相对于未感染细胞提高了约24倍.结论 成功构建Has-mir-196b慢病毒表达载体.     

小窝蛋白-1重组慢病毒载体的构建及鉴定

目的构建小窝蛋白-1（Cav-1）重组慢病毒载体，并在293T细胞和小鼠中验证Cav-1过表达。方法将Cav-1基因克隆至慢病毒载体GV287，然后利用酶切、PCR扩增鉴定、阳性克隆鉴定及测序验证构建Cav-1重组慢病毒。将Cav-1重组慢病毒转染至293T细胞，通过荧光检测慢病毒转染效果，采用Westernblot法检测Cav-1蛋白表达情况，同时转染C57BL6小鼠，免疫组化法检测小鼠肺组织中Cav-1的表达情况。结果经酶切、PCR扩增鉴定以及阳性克隆测序，提示Cav-1重组慢病毒构建正确。荧光检测显示转染Cav-1重组慢病毒后的293T细胞可见强荧光，Westernblot法检测结果显示目的基因可表达，小鼠肺组织中Cav-1呈强阳性表达，且实时定量PCR检测Cav-1重组慢病毒滴度为1.3×1012copies/ml，达到可利用标准。结论采用本研究方法可成功构建Cav-1重组慢病毒载体。     

人THAP11慢病毒载体的构建及表达研究

目的 构建人死亡相关蛋白11(THAP11)基因的慢病毒载体,并建立其慢病毒表达系统.方法 PCR方法获得人THAP11基因,限制性内切酶酶切和基因重组构建慢病毒载体质粒pBPLV-THAP11-myc,并通过转染HEK293细胞观察绿色荧光蛋白(GFP)的表达以及Western blot检测其表达.在脂质体介导下将重组质粒与包装质粒pLP1和pLP2、包膜质粒pLP/VSVG共转染293FT细胞包装产生慢病毒.结果 构建的质粒经PCR,酶切及测序鉴定正确;该质粒与包装质粒共转染293FT细胞获取的5.5×106TU/ml慢病毒滴度.结论 成功构建了人THAP11基因慢病毒载体质粒THAP11-myc-pBPLV,并建立了其慢病毒表达系统,为后续的应用研究奠定了基础.     

人CCR5Delta32基因重组慢病毒载体的构建及表达

目的:构建含人CCR5Delta32基因的重组慢病毒载体并鉴定其表达性能。方法:从CCR5Delta32突变个体外周血单个核细胞(PBMCs)内提取人基因组DNA,利用PCR技术扩增CCR5Delta32全长基因,经EcoRI单酶切后与pUCm-T载体连接,随后转化感受态E.coliDH5α,提取质粒进行酶切鉴定及DNA测序。再将鉴定正确的CCR5Delta32基因亚克隆至慢病毒载体pLenti6/V5-D-TOPO并进行酶切鉴定及DNA序列分析。最后用pLP1、pLP2、pLP/VSVG及pLenti-CCR5Delta32四种质粒共转染293T细胞,产生重组慢病毒并通过Western blot鉴定目的基因在靶细胞内的表达。结果:经PCR扩增获得约650bp的DNA片段,测序结果与发表于GenBank上的序列完全一致。经酶切鉴定,克隆的目的基因已经正确插入到慢病毒载体pLenti6/V5-D-TOPO中。四种质粒共转染293T细胞,产生出5×105TU/ml高滴度的重组慢病毒。用其感染靶细胞,Western blot结果显示有目的蛋白表达。结论:成功构建了含人CCR5Delta32基因的重组慢病毒载体并将其在293T细胞内表达,为进一步AIDS基因治疗研究奠定基础。     

miR-186过表达慢病毒载体的构建及鉴定

目的：构建miR-186过表达慢病毒载体并包装慢病毒,探讨miR-186在人胚胎肾细胞（HEK）293T细胞系中的感染效率和表达水平。方法：以Hsa-miR-186前体序列为模板,设计并合成引物,PCR法扩增pre-miR-186基因序列,并将其克隆到携带EGFP/Puromycin的慢病毒载体FV040中,经EcoRⅠ和AgeⅠ酶切及测序鉴定后获得重组慢病毒载体。利用Lipofectamine 2000将重组慢病毒质粒FV040 Vector和FV040 miR-186分别与辅助质粒通过共转染至HEK293T细胞中,48 h后收集慢病毒,以FV040 Vector慢病毒作为对照组,FV040 miR-186作为实验组,分别感染HEK293T细胞。感染48 h后,观察HEK293T细胞中绿色荧光的分布情况,并采用实时荧光定量PCR法检测miR-186的表达水平。结果：测序分析,miR-186过表达慢病毒与GenBank上公布的miR-186序列完全一致。与对照组（0.8387±0.1456）比较,实验组HEK 293T细胞中miR-186表达水平（12.6400±0.7884）明显升高（t=14.72,P<0.01）,约为对照组的15.07倍。结论：成功构建miR-186过表达慢病毒载体并包装出慢病毒,miR-186慢病毒成功感染HEK293T细胞,miR-186表达水平在HEK293T细胞中明显升高。     

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.