去C末端JAK3基因重组逆转录病毒载体的构建及其在NIH3T3细胞中的表达

目的 :构建去C末端Jak3重组逆转录病毒载体 ,获得能稳定产生去C末端Jak3基因的重组逆转录病毒的细胞株 ,为利用去C 末端Jak3对白血病进行基因治疗的实验研究打基础。方法 :用限制性内切酶从质粒PcJak3(ΔC)中切出目的基因并从凝胶中回收该目的基因片段 ,连接到逆转录病毒载体PLXSN多克隆位点上构建重组逆转录病毒载体PLJak3(ΔC) ,通过转化感受态细菌后氨卞青霉素筛选、酶切及DNA测序鉴定 ;用脂质体LIPOFECTAMINE转染包装细胞PA317细胞并用G4 18筛选抗性细胞 ,转染的包装细胞包装出病毒粒子 ,同时用PCR方法检测PA317阳性细胞中是否插入目的基因片段 ;用该病毒感染靶细胞NIH3T3,G4 18筛选抗性克隆 ,检测出病毒滴度 ;经免疫沉淀 (IP)、SDS PAGE电泳、Westernblotting检测NIH3T3细胞中Jak3(ΔC)的表达情况。结果 :①重组逆转录病毒载体PLJak3(ΔC)酶切和DNA检序均表明已含有 2 796bp的Jak3(ΔC)基因 ;②转染的PA317阳性细胞经PCR扩增后得到与目的基因一致的片段 ;③病毒滴度为 1.2～ 2 .0× 10 4CFU/ml;④转染的NIH3T3细胞中表达出了Jak3(ΔC)蛋白 ,其分子量为 10 7KD。结论 :我们已成功构建了去C 末端Jak3重组逆转录病毒载体PLJak3(ΔC) ,并得到稳定产生病毒粒子的PA317细胞克隆 ,为利用Jak3(ΔC)对白血病     

iNOS基因重组逆转录病毒的包装及高滴度病毒液的制备

目的利用逆转录病毒载体PLXSN介导iNOS基因转染,为逆转录病毒介导的iNOS转基因防治血管移植术后再狭窄的研究奠定实验基础。方法采用QIAGEN plasmid Maxi Kit纯化PLXSN-iNOS;通过脂质体介导的DNA转染法将PLXSN-iNOS导入包装细胞PA317中;经G418筛选获得抗性克隆,命名为PA317/iNOS;提取抗性克隆细胞基因组DNA,用PCR进行鉴定;用NIH3T3细胞测定病毒上清滴度。结果PA317/iNOS细胞能稳定合成和分泌重组逆转录病毒颗粒,并在约142 bp处扩增出特异的片段;PLXSN-iNOS病毒上清的最高滴度为1.6×106CFU/mL。结论逆转录病毒载体PLXSN能有效介导iNOS基因的转染。     

携带EGFP与rtTA双基因的逆转录病毒载体的构建及其在PA317细胞中的表达

目的 构建表达增强型绿色荧光蛋白(EGFP)、rtTA双基因的重组逆转录病毒载体pLXSN-EGFP-rtTA,并在PA317细胞中表达.方法 以质粒pEGFP-C1为模板进行PCR反应获得EGFP基因片段,定向插入逆转录病毒载体pLXSN,筛选出正确的重组逆转录病毒载体pLXSN-EGFP.PCR方法从pTet-on质粒中扩增出rtTA基因,酶切纯化后克隆于逆转 录病毒载体pLXSN-EGFP中,限制性内切酶酶切分析及PCR鉴定筛选出正确的重组载体pLXSN-EGFP-rtTA,脂质体介导转染PA317细胞,PCR方法检测PA317细胞内EGFP、rtTA基因,RT-PCR方法检测PA317细胞内rtTA基因的mRNA表达,荧光显微镜观察EGFP基因的表达情况.以NIH3T3细胞为靶细胞测定重组逆转录病毒滴度.结果 成功构建了表达EGFP、rtTA双基因的重组逆转录病毒载体,转染PA317细胞后,RT-PCR方法可检测到rtTA基因的mRNA表达,荧光显微镜下可观察到EGFP基因表达所产生的绿色荧光,说明连接有EGFP和rtTA双基因的逆转录病毒载体在PA317细胞中可正常表达,转染pLXSN-EGFP-rtTA载体的PA317细胞可产生4.8x 104 CFU/ml病毒滴度的重组病毒.结论 成功构建表达EGFP、rtTA双基因的重组逆转录病毒载体,该载体可在PA317细胞内正常表达,获得较高滴度的病毒上清.     

带SV40LT抗原基因的逆转录病毒载体的构建

目的构建带有SV40LT抗原基因的逆转录病毒载体.方法采用体外重组技术构建带SV40LT抗原基因的逆转录病毒载体,酶切、测序进行鉴定,脂质体介导转染PA317包装细胞,经G418筛选出抗性克隆,通过NIH3T3细胞测定病毒滴度.结果酶切分析、测序证明重组逆转录病毒载体含有SV40LT抗原基因,且为正向插入.NIH3T3细胞测定病毒滴度为1.3×106CFU/ml.结论成功构建了含SV40LT抗原基因的逆转录病毒载体并包装出了高滴度的假病毒颗粒.     

分泌高滴度重组人糖皮质激素β受体正义和反义cDNA逆转录病毒细胞系的建立

目的：建立分泌重组人糖皮质激素β受体cDNA的逆转录病毒的细胞系。方法：脂质体介导含人糖皮质激素β受体正义和反义全长cDNA的重组逆病毒质粒分别转染包装细胞PA317，经G418筛选抗性克隆。结果：细胞培养上清液的RT-PCR联合序列分析表明G418抗性PA317细胞克隆能稳定合成并分泌相应的重组病毒颗粒；NIH3T3细胞测定的正、反义cDNA重组病毒滴度分别为2×105 CFU/ml和1.8×105 CFU/ml。结论：成功建立了能分别产生重组hGRβ正义和反义cDNA逆转录病毒的高滴度细胞系，为后续研究工作打下坚实基础。     

TH基因逆转录病毒表达载体的构建及产病毒细胞系的建立

目的　构建含有鼠酪氨酸羟化酶 (TH)基因的重组逆转录病毒表达载体 p N2 ATH,建立 PA317产病毒细胞系。方法　将质粒 p GEM- 2上酶切下的 THc DNA片段与线性化的逆转录病毒表达载体 N2 A连接 ,克隆出重组逆转录病毒表达载体 p N2 ATH。把 p N2 ATH质粒转入 PA317包装细胞 ,通过 G4 18抗性筛选 ,NIH3T3细胞测定病毒滴度 ,得到高滴度产毒 PA317/p N2 ATH细胞株 ,免疫组化测定细胞 TH表达。结果　重组质粒 p N2 ATH经酶切鉴定证明 THc DNA正向插入 N2 A表达载体中 ,PA317/p N2 ATH产毒细胞高效表达 TH。结论　成功地构建了重组逆转录病毒表达载体p N2 ATH,建立了 PA317/p N2 A产毒细胞株     

人CTLA4Ig和EGFP双基因共表达逆转录病毒载体构建及鉴定

目的 构建并鉴定人CTLA4Ig和增强型绿色荧光蛋白（EGFP）双基因共表达逆转录病毒载体。方法 利用基因重组技术将IRES序列与CTLA4Ig和EGFP基因构建到逆转录病毒载体中，脂质体法将重组质粒pCTLA4Ig-IRES2-EGFP转染PA317细胞，在G418选择压力下，通过流式细胞检测筛选得到高效共表达CTLA4Ig和EGFP并能产生高滴度重组逆转录病毒的PA317细胞克隆，MTT法测定CTLA4Ig生物学活性。结果 成功构建出含IRES序列的CTLA4Ig和EGFP双基因共表达逆转录病毒载体，生物学活性测定表明CTLA4Ig生物学活性没有受到影响。结论 IRES序列调控CTLA4Ig与EGFP双基因在细胞中同时独立表达。     

C-末端缺陷JAK3逆转录病毒载体的构建及在真核细胞中的表达

目的　以逆转录病毒 PL XSN为载体 ,构建重组逆转录病毒 C-末端缺陷的 JAK3[c- term defi-cient JAK3,JAK3(ΔC) ]载体 PL JAK3(Δ C) ,以 BAL B/ c3T3为靶细胞 ,转染 JAK3(ΔC) c DNA,检测 JAK3(Δ C)蛋白在真核细胞中的表达情况。为利用 JAK3(ΔC)对白血病进行基因治疗的实验研究打基础。方法　用限制性内切酶法从质粒 Pc DNA3- JAK3(Δ C)中分离目的基因片段 ,连接到逆转录病毒载体 PL XSN多克隆位点上构建重组逆转录病毒载体 PL JAK3(Δ C) ,通过转化感受态细菌扩增并检测 DNA序列及限制性内切酶酶切鉴定 ;用脂质体L IPOFECTAMINE介导法将 PL JAK3(Δ C)转染包装细胞 PA317细胞 ,并用 G4 18筛选抗性细胞克隆 ,收集病毒 ;用该病毒感染靶细胞 BAL B/ c3T3,G4 18筛选抗性克隆并测定病毒滴度 ;抗性细胞扩增培养 ,细胞溶解后经免疫沉淀 (IP)、Western blotting检测 BAL B/ c3T3细胞中 JAK3(Δ C)的表达情况。结果　 1重组逆转录病毒载体 PL -JAK3(Δ C)酶切和 DNA测序均表明含有 2 796 bp的 JAK3(ΔC)基因 ;2病毒滴度为 1.2× 10 4 CFU/ ml;3PL JAK3(Δ C)转染 BAL B/ C3T3细胞中表达出了 JAK3(Δ C)蛋白 ,其相对分子质量为 10 7× 10 3。结论　该研究构建的 C-末端缺陷 JAK3重组逆转录病毒载体 PL JAK3(     

含HSVtk基因重组逆转录病毒包装细胞PA317/TK的建立

目的 :研究肿瘤的自杀基因疗法 ,建立含单纯疱疹病毒胸苷激酶 (HSVtk)基因重组逆转录病毒包装细胞PA317/TK。　方法 :应用脂质体转移方法将逆转录病毒载体GINaTK导入PA317,经G4 18筛选阳性克隆细胞后分别用PCR和扫描电镜检测HSVtk基因整合和病毒颗粒分泌情况。　结果 :逆转录病毒载体GINaTK导入PA317,G4 18后筛选得到阳性克隆细胞 ,命名为PA317/TK。PCR检测PA317/TK细胞出现一特异性 4 0 4bp阳性条带 ,而PA317细胞没有扩增出相应条带。PA317/TK细胞经扫描电镜检测见其表面有颗粒状突起 ,其周围有许多呈团状的病毒颗粒。证实含HSVtk基因重组逆转录病毒存在于包装细胞中。　结论 :成功建立含HSVtk基因重组逆转录病毒包装细胞     

HyTK基因转导联合丙氧鸟苷对鼠膀胱癌细胞的体外杀伤作用

目的　探索HyTK基因转导丙氧鸟苷 (ganciclovir,GCV)对鼠膀胱癌细胞的影响。方法　脂质体介导法将PL(HyTK)SN质粒转染PA3 17细胞 ,潮霉素B筛选 ,直到出现抗性克隆 ,扩增培养 ,NIH3T3细胞测定病毒滴度 ,用逆转录病毒上清液感染T73 9细胞 ,潮霉素B筛选 ,直到出现抗性克隆 ,扩增培养 ,命名为T73 9 TK。RT PCR对T73 9 TK细胞进行鉴定。然后观察其在体外膀胱癌细胞的杀伤作用。结果　RT PCR证实HyTK基因已插入T73 9细胞并有其mRNA的表达 ,经不同浓度GCV处理后的T73 9 TK细胞均表现出有杀伤作用 ,而T73 9细胞在各个剂量的GCV作用下生长均良好。结论　GCV对转导了HyTK基因的T73 9细胞有显著杀伤作用     

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.