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1.
腺病毒介导GRIM19对恶性胶质瘤CHG-5细胞增殖及分化的影响   总被引:1,自引:1,他引:0  
目的 观察增强外源性GRIM19(genes associated with retinoid-IFN-induced mortality 19)基因表达对恶性胶质瘤CHG-5细胞生物学特性的影响,初步探讨其机制.方法 利用已成功构建的Ad-GRIM19腺病毒感染CHG-5细胞,通过形态学、细胞生长曲线、软琼脂克隆形成等观察增强GRIM19基因表达后CHG-5细胞形态、增殖和体外成瘤能力的变化,台盼蓝染色法检测细胞活力,Real-time PCR及Western blot检测STAT3与PCNA基因表达.结果 Ad-GRIM19在体外感染CHG-5细胞后,明显改变CHG-5细胞生长形态,细胞增殖及体外成瘤减低,STAT3、PCNA基因表达下调.结论 GRIM19过表达可显著抑制CHG-5细胞恶性表型,提示GRIM19基因在调控胶质瘤细胞分化程度及恶性生物学行为方面具有重要作用.  相似文献   

2.
目的:构建编码小鼠PGC1α基因的重组腺病毒载体.为进一步研究其蛋白功能提供工具.方法:穿梭质粒pAdTrack-CMV-PGC1α线性化后与骨架质粒pAdeasy-1在BJ5183菌中完成同源重组,筛选并提取重组正确的腺病毒质粒,PacI线性化,脂质体转染293细胞包装出成熟的具有感染活力的腺病毒颗粒,TCID50法测定病毒滴度,Western bloting检测PGC1α蛋白在293细胞的表达.结果:测序及酶切鉴定表明目的基因正确插人穿梭质粒,读码框未发生移位.重组腺病毒扩增后滴度约3×1010TCID50/ml,能在293细胞中表达PGC1α蛋白.结论:利用细菌内同源重组的方法成功构建了编码小鼠PGC1α基因的重组腺病毒载体,并观察到其蛋白表达.  相似文献   

3.
目的:观察慢病毒表达载体介导的RNA干扰(RNAinterference,RNAi)对人胶质瘤细胞U251骨桥蛋白(osteopon-tin,OPN)表达的影响,为后续的以OPN基因为靶点的神经胶质瘤基因治疗研究奠定基础.方法:应用基因工程技术,筛选出2条针对OPN基因的RNAi靶序列,分别与pGCL-GFP载体连接,构建2个重组慢病毒表达载体LV-OPNshRNA1,LV-OPNshRNA2;将连接产物转化到DH5α感受态细胞,经PCR筛选阳性克隆、测序鉴定.将LV-OPNshRNA,pHelper 1.0,pHelper 2.0共转染293T细胞,包装产生慢病毒颗粒并测定病毒滴度.将包装产生的2种重组慢病毒分别感染U251细胞,实时定量PCR和Western印迹检测U251细胞OPN mRNA和蛋白的表达,并与未转染及空转染细胞进行比较.结果:2个慢病毒载体PCR和测序结果与预期结果一致,经包装产生的病毒滴度为8×1010TU/L和5×1010TU/L.感染U251细胞后,OPN基因mRNA和蛋白的表达量与未感染慢病毒的细胞组及空载体感染组相比均明显下降.结论:成功构建针对OPN基因的2个慢病毒载体OPN...  相似文献   

4.
目的 构建小鼠促血管生成素-2(Ang-2)基因过表达重组腺病毒载体.方法 化学合成小鼠Ang-2编码序列,经PCR扩增、鉴定后连接至穿梭质粒.将含目的基因的重组质粒转化DH5α感受态细胞,所得阳性转化子经电泳分析并测序鉴定.将携带目的基因的穿梭质粒与辅助包装质粒共转染人胚肾细胞系HEK293细胞,反复冻融获取重组腺病毒,终点稀释法测定病毒滴度,重组腺病毒转染HEK293细胞并提取蛋白,采用免疫印迹法分析Ang-2蛋白的表达.结果 PCR产物电泳分析可见大小约1.5 kp的特征性条带,基因序列显示测序结果与GenBank提供的Ang-2序列一致,经 HEK293细胞包装后腺病毒滴度为1×108.8 pfu/ml,免疫印迹法分析可见大小57 kD特征性条带,即重组腺病毒可成功表达Ang-2蛋白.结论 Ang-2基因重组腺病毒载体可成功构建.  相似文献   

5.
目的构建大鼠促红细胞生成素(erythropoietin,EPO)重组腺病毒载体,并转染于体外培养的大鼠螺旋神经元(spiral ganglion neurons,SGNs)。方法全基因合成大鼠EPO基因,亚克隆至穿梭质粒pAdTrack-CMV,构建重组穿梭质粒pAdTrack-CMV-EPO。经酶切、PCR及测序鉴定,再经PacⅠ酶切线性化后电转化感受态细胞,获得重组腺病毒载体pAdTrack-CMV-EPO,经PacⅠ酶切后转染至293细胞进行包装,制备重组腺病毒,扩增后进行病毒滴度测定及RT-PCR和Western blot鉴定。并转染至体外培养的螺旋神经元,免疫荧光检测及蛋白水平检测螺旋神经元中EPO表达。结果经KpnⅠ、HindⅢ酶切与测序鉴定显示,腺病毒载体pAdTrack-CMV-EPO构建成功,重组腺病毒AdEPO在293细胞中成功包装,扩增后病毒滴度为1.17×1011U/ml;经RT-PCR和Western blot检测EPO在293细胞中成功表达。重组腺病毒载体AdEPO经鉴定均构建正确;免疫荧光及Western blot检测转染腺病毒后螺旋神经元中EPO表达显著增强。结论成功构建了EPO重组腺病毒载体,并成功转染螺旋神经元,可显著增强螺旋神经元中EPO表达水平。  相似文献   

6.
目的:构建鼠IFN-λ2重组腺病毒载体。方法:用人水疱口炎病毒诱导小鼠原代脾细胞表达IFN-λ2,通过RT-PCR获取IFN-λ2 cDNA,将其亚克隆至pShuttle-CMV载体,经PmeⅠ线性化后,与腺病毒的骨架载体pAdEasy在BJ5183菌中同源重组,转染293A细胞包装扩增,RT-PCR检测重组腺病毒的目的基因,TCID50法对构建的腺病毒进行滴度测定。用鼠IFN-λ2重组腺病毒感染小鼠肺腺癌细胞,蛋白质印迹法检测细胞中IFN-λ2蛋白的表达,倒置显微镜观察鼠IFN-λ2重组腺病毒对鼠肺腺癌细胞生长的抑制作用。结果:成功克隆鼠IFN-λ2的cDNA,序列与基因库公布序列完全一致;经酶切鉴定表明成功构建鼠IFN-λ2重组腺病毒载体;重组腺病毒载体在293A细胞中成功包装及扩增;包装成功的重组腺病毒中含有目的基因,病毒滴度为2×1010pfu/ml;蛋白质印迹显示感染细胞的上清中有鼠IFN-λ2蛋白的表达,倒置显微镜显示感染的鼠肺腺癌细胞生长受到抑制。结论:成功构建了鼠IFN-λ2重组腺病毒载体,并能介导鼠IFN-λ2蛋白的表达进而抑制鼠肺腺癌细胞的生长,为进一步开展抗肿瘤研究及基因治疗奠定基础。  相似文献   

7.
目的构建含有人IL-24基因的重组腺病毒载体,并转染肺腺癌细胞A549细胞观察其感染能力,为进一步的基因治疗奠定实验基础.方法采用基因工程技术将人IL-24基因cDNA亚克隆至穿梭质粒pAdTrack-CMV上,采用PAdEasy系统进行细菌内同源重组,后通过脂质体将正确重组体包裹并转染293T细胞以包装并扩增病毒.采用PCR方法对重组腺病毒进行鉴定, 利用穿梭质粒中所带绿色荧光蛋白GFP报告基因,对病毒滴度和感染效率进行检定;最后采用免疫组化法对IL-24在A549中的表达进行检测.结果酶切和PCR结果证实IL-24基因重组腺病毒载体构建成功,病毒滴度达1.2×1010 pfu/ml,能够成功转染A549细胞并在其中进行表达.结论成功构建了有较强感染能力的含人IL-24基因的重组腺病毒载体.  相似文献   

8.
李玉珠  况春燕 《重庆医学》2021,50(8):1277-1283
目的 构建大鼠shRNA-Slfn5重组腺病毒载体并观察在内皮祖细胞(EPCs)中的转染效率.方法 根据Rat Slfn5基因的mRNA序列设计合成siRNA片段5个,分别克隆到pDKD-CMV-U6-shRNA上转入大肠杆菌感受态细胞,PCR筛选转化子,阳性克隆进行测序;利用Admax系统选取目的穿梭质粒shRNA-Slfn5(5)包装和扩增重组腺病毒shRNA-Slfn5及病毒滴度测定;利用Slfn5过表达腺病毒质粒中目的基因携带Flag标签,通过Western blot法检测Slfn5过表达腺病毒质粒与靶点质粒共转染293T细胞中Flag表达,观察靶点质粒对Slfn5表达的影响;最后用病毒感染EPCs并用绿色荧光蛋白量检测转染效率.结果 经测序验证5组目的质粒构建成功;重组腺病毒质粒shRNA-Slfn5(1)、shRNA-Slfn5(4)、shRNA-Slfn5(5)可明显抑制Flag蛋白的表达;shRNA-Slfn5病毒滴度为3.95×1010 PFU/mL;EPCs的转染效率为(85.64±2.58)%.结论 构建了shRNA-Slfn5重组腺病毒载体,其在EPCs转染效率高.  相似文献   

9.
目的 应用pAdxsi载体系统构建携带PTEN基因的腺病毒载体.方法 将PTEN cDNA自载体pcDNA3-PTEN中切出,克隆至穿梭质粒pShuttle-GFP-CMV中,然后与腺病毒质粒pAdxsi在化学感受态细胞DH5α菌株内同源重组,经Pac-Ⅰ线性化后,重组子通过脂质体2000介导转染HEK293细胞,产生有感染能力的腺病毒,并测定其滴度,通过荧光显微镜能观察HEK293细胞内绿色荧光的表达;PCR检测腺病毒载体PTEN mRNA的表达,Western blotting检测PTEN蛋白在气道平滑肌细胞的表达.结果 感染腺病毒载体的HEK293细胞表达GFP随着时间逐渐增强,并且出现明显的细胞病变效应,经过3轮扩增后病毒达到合适的滴度,构建的Ad-PTEN腺病毒滴度为2×1010pfu/ml,PCR扩增后经琼脂糖凝胶电泳证实其表达,Western blotting检测纠腺病毒感染的气道平滑肌细胞内PTEN蛋白表达明显增高.结论 成功构建了携带野生型PTEN腺病毒载体,为进一步研究PTEN基因应用于哮喘治疗提供了实验基础.  相似文献   

10.
目的 制备表达绿色荧光蛋白的含人白细胞介素21(IL-21)基因的重组复制缺陷型腺病毒,为IL-21基因治疗肿瘤的研究奠定基础.方法 从人外周血淋巴细胞提取总RNA,经RT-PCR扩增IL-21基因片段,PCR产物和pDC316-mCMV-EGFP载体分别经限制性内切酶Notl与HindⅢ双酶切,然后将酶切产物连接、转化,构建pDC316-IL21-EGFP重组质粒.重组质粒经酶切和测序鉴定后,与腺病毒骨架质粒pBHGlox_E1,3CreF35共转染293细胞,包装产生Ad5F35-IL21-EGFP重组腺病毒,并测定病毒滴度.观察Ad5F35-IL21-EGFP腺病毒转染后食管癌细胞EC-9706的生长曲线和细胞周期的变化.结果 pDC316-IL21-EGFP重组质粒经酶切和测序证实,IL-21基因片段正确插入pDC316-mCMV-EGFP栽体中且与GenBank中,IL-21基因序列一致.AdSF35-IL21-EGFP重组腺病毒栽体在293细胞中包装成功.获得成熟的病毒颗粒,经鉴定有IL-21基因和绿色荧光蛋白的表达.测得Ad5F35-IL-21-EGFP病毒颗粒滴度为9×1011VP/ml,感染性滴度为5×1010IU/ml.AdSF35-IL21-EGFP转染后,EC-9706细胞的生长缓慢(P<0.05),G1期细胞增加,而G2期和S期细胞减少.结论 成功制备了表达绿色荧光蛋白的人IL-21基因的重组腺病毒,且病毒滴度较高.腺病毒介导的外源性IL-21基因可有效转染EC-9706细胞,并对其生长有抑制作用.  相似文献   

11.
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.  相似文献   

12.
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.  相似文献   

13.
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.  相似文献   

14.
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.  相似文献   

15.
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.  相似文献   

16.
A clinical guideline for the therapeutic interventions of integrative medicine may be defined as a written document which states a series of recommendations on therapeutic interventions of integrative medicine for a special disease or condition. The guideline may provide assistance to medical professionals in making clinical decisions aimed at improving the clinical outcome of patients and reducing the costs of medical care(~'4~. Recommendations issued by a guideline should be based on the best available evidence in both Western and Chinese medicine. For fulfilling this purpose, the development of clinical guidelines for therapeutic interventions in the field of integrative medicine should follow scientific principles and undergo a rigorous processes.  相似文献   

17.
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.  相似文献   

18.
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.  相似文献   

19.
Journal of Nanjing Medical University (English Edition) JNMU, sponsored by Nanjing Medical University, was established in 1987. It is a bimonthly comprehensive English medical journal published locally and abroad.Since 2007, Journal of Nanjing Medical University (English Edition )was granted Elsevier the full publishing and distribution rights worldwide for the Electronic Edition, excluding the People's Republic of China.  相似文献   

20.
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.  相似文献   

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