Cx43和GFP双基因共表达重组腺病毒载体的构建和鉴定

目的构建间隙连接蛋白43（Cx43）和绿色荧光蛋白（GFP）双基因共表达重组腺病毒载体。方法利用PCR方法从真核表达载体pcDNA3.0-Cx43扩增Cx43片断,利用DNA重组技术,将目的基因Cx43克隆至含有报告基因GFP的穿梭质粒pAdTrack-CMV,然后在BJ5183细胞中将重组穿梭质粒pAdTrack-Cx43与pAdeasy-l质粒进行同源重组,产生重组腺病毒载体pAd-Cx43-GFP,用PacⅠ单酶切鉴定重组载体;将pAd-Cx43-GFP转入293细胞中包装,荧光显微镜观察报告基因GFP的表达,Western blot方法检测293细胞中Cx43表达。结果（1）通过PCR方法从载体pcDNA3.0-Cx43扩增出单一条带,与Cx43片断大小相符;（2）重组穿梭质粒pAdTrack-Cx43经NotⅠ/XhoⅠ双酶切后,电泳可见2个大小约为9、1kb条带,证明pAdTrack-Cx43构建成功;（3）同源重组产物pAd-Cx43-GFP经PacⅠ酶切后,电泳可观察到2个大小约为31、4kb左右条带,与预期结果相符,提示同源重组成功;（4）荧光显微镜下观察可见转染pAd-Cx43-GFP后293细胞在培养1-2d即有绿色荧光表达;（5）利用WesternBlot法检测到转染pAd-Cx43-GFP后293细胞中Cx43的表达较未转染组增强。结论Ad-Cx43-GFP重组腺病毒载体构建成功。     

血管生成素1和报告基因EGFP双基因共表达腺病毒的构建

目的:构建并制备血管生成素-1和EGFP双基因共表达重组腺病毒载体.方法:采用基因克隆技术克隆目的基因ANG-1,并将得到的基因亚克隆至含有报告基因EGFP的穿梭载体pAdTrack-CMV;使用Padeasy-1腺病毒系统将含有目的基因的穿梭载体与腺病毒骨架质粒在细菌BJ5183中同源重组,产生重组腺病毒载体;线性化重组的腺病毒转染入QBI-293A细胞中对重组的腺病毒进行包装并扩增. 结果:ANG-1基因与腺病毒穿梭载体连接成功,经Xho I/EcoR V双酶切后琼脂糖电泳可见在1.5 kb处出现特异性条带,证明pAdTrack-CMV-ANG-1重组质粒构建成功;重组的穿梭载体与pAdeasy-1质粒重组后,产物经Pac I酶切后琼脂糖电泳可见一大一小两个片段. 大小约为30 kb和4.5 kb,与预期结果相符,证明重组腺病毒pAd-ANG-1-EGFP构建成功;线性化重组的腺病毒转染入QBI-293A细胞后包装成功. 扩增后病毒滴度为2×1014 v.g./L,EGFP活性检测腺病毒感染细胞阳性率在30%以上. 结论:成功制备了pAd-ANG-1-EGFP腺病毒. 为骨组织工程血管化的研究打下基础.     

HIF-1α和EGFP双基因共表达重组腺病毒载体的构建及鉴定

目的 构建pAdeno-EGFP-HIF-1α 重组腺病毒载体,探讨其在脊髓损伤中的作用。 方法 采用聚合酶链反应（polymerase chain reaction,PCR） 法扩增目的基因HIF-1α 并亚克隆到含有报告基因EGFP 的pShuttle-CMV-EGFP 穿梭载体中,得到pShuttle-EGFP-HIF-1α 重组穿梭质粒。将已构建的重组穿梭质粒转移至pAdeno 骨架载体上,获得pAdeno-EGFP-HIF-1α 重组腺病毒质粒,继而在H293 细胞中扩增,纯化后进行PCR 鉴定并测定病毒滴度。 结果 pShuttle-EGFPHIF-1 α 经KpnI/BamHI 双酶切后琼脂糖凝胶电泳可见阳性克隆组在2.5 kb 和5.1 kb 处出现两条带,而阴性克隆组只有5.1 kb 处一条带,证明pShuttle-EGFP-HIF-1α 重组穿梭质粒构建成功;pShuttle-EGFP-HIF-1α 重组穿梭质粒与pAdeno 载体重组后,经XhoI 单酶切后琼脂糖凝胶电泳可见阳性克隆组出现14.5 kb,11.7 kb,2.66 kb,2.6 kb,2.48 kb,2.47 kb,1.45 kb,0.6 kb 八条带,而阴性克隆的腺病毒空载组有14 kb,11.8 kb,4.0 kb,2.47 kb,1.45 kb,0.6 kb 六条带,证明重组pAdeno-EGFP-HIF1α 腺病毒质粒构建成功;pAdeno-EGFP-HIF-1α 重组腺病毒成功包装纯化后经PCR 鉴定,实验组和阳性对照组中均扩增到2.5 kb 片段,证明目的病毒中成功整合了HIF-1α 基因;TCID50 法测定纯化后的病毒滴度为2×10 10 PUF/ml 。 结论 成功构建了HIF-1α 和EGFP 双基因共表达重组腺病毒载体,为进一步研究其在脊髓损伤中的作用奠定了基础。     

人CTLA4Ig基因重组腺病毒载体的构建及鉴定

目的:用AdEasy腺病毒载体系统构建CTLA4Ig重组腺病毒,以感染树突状细胞使其递呈抗原至T淋巴细胞功能受阻.方法:双酶切、凝胶回收方法从质粒pCDM8-CTLA4Ig提取目的基因CTLA4Ig,构建成腺病毒穿梭质粒pAdTrack-CTLA4Ig;经酶切线性化后的pAdTrack-CTLA4Ig与AdEasy-1进行同源重组,经酶切线性化转染入HEK293细胞进行包装.结果:卡那霉素抗性筛选和PacⅠ酶切确证重组腺病毒质粒pAd-CTLA4Ig,PacⅠ酶切产生30 kb和4.5 kb 2个片断为同源重组.重组腺病毒质粒经293细胞包装后可观察到绿色荧光,收获病毒并制备出高滴度重组腺病毒(病毒滴度为1.6×109).结论:成功构建了携带CTLA4Ig基因的重组腺病毒载体,为利用CTLA4Ig基因转染树突状细胞的基因治疗奠定了基础.     

小鼠降钙素基因相关肽基因重组腺病毒载体的构建及其在心肌细胞的表达

目的:利用AdEasy腺病毒载体系统,构建小鼠降钙素基因相关肽(calcitonin gene-related peptide,CGRP)基因重组腺病毒载体,并验证其在心肌细胞中的表达.方法:采用RT-PCR方法扩增出含有小鼠CGRP全长cDNA的基因片段,并将其插入PUC57载体,经EcoRⅤ和SalⅠ双酶切,将小鼠CGRP基因亚克隆至穿梭质粒pShuttle-CMV,形成重组质粒pShuttle-CMV-CGRP.经PmeⅠ酶切线性化后,在大肠杆菌BJ5183中与腺病毒骨架质粒pAdEasy-1同源重组产生重组腺病毒质粒AdEasy-pShuttle-CGRP.重组腺病毒质粒在XL-Gold 细胞中扩增,经PacⅠ酶切线性化后,转染人胚肾293细胞进行重组腺病毒的包装,并经氯化铯纯化得到重组腺病毒AdEasy-pShuttle-CGRP.用纯化后的重组腺病毒转染原代培养的乳鼠心肌细胞,荧光显微镜下观察转染效果.通过尾静脉导入重组腺病毒7 d后,放免法测定心肌中CGRP的表达量.结果:测序证实PUC57 -CGRP重组质粒中含有小鼠CGRP基因的cDNA;重组穿梭质粒pShuttle-CMV-CGRP经双酶切鉴定后可见约7.5 kb和423 bp片段;重组腺病毒质粒AdEasy-pShuttle-CGRP经Pac Ⅰ酶切可见长约3 kb与30 kb DNA片断.转染293细胞进行包装,7 d后细胞出现病变效应,回收病毒重复感染293细胞,在荧光显微镜下可见绿色荧光蛋白表达.提取病变293细胞中重组腺病毒进行目的基因的PCR鉴定为阳性.构建好的重组腺病毒经纯化后具有很高的滴度,并且成功转染了原代培养的乳鼠心肌细胞.通过放免法证实,该载体可以显著增加小鼠心脏中CGRP的表达.结论:成功构建携带CGRP基因的重组腺病毒载体,该重组腺病毒载体AV-CGRP可以显著增加心脏中CGRP的表达量,为进一步研究CGRP基因治疗奠定了基础.     

细菌内同源重组法高效制备携带增强型绿色荧光蛋白与人内皮型一氧化氮合酶cDNA的重组腺病毒载体

目的:利用细菌内同源重组法快速构建携带增强型绿色荧光蛋白(EGFP)和人内皮型一氧化氮合酶(he-NOS)cDNA的重组腺病毒质粒和制备表达EGFP和heNOS的重组腺病毒。方法:质粒载体pHCMV SP1A-heNOS用EcoRⅠ酶切,回收heNOS cDNA,亚克隆至腺病毒穿梭质粒中,形成转移质粒pShuttle-heNOS-EGFP;然后用PmeI线性化后的pShuttle-heNOS-EGFP转化含腺病毒骨架质粒pAdEasy-1的感受态BJ5183,使其在细菌内发生同源重组,获得阳性重组质粒pAdEasy-heNOS-EGFP。重组质粒经PCR、酶切和测序鉴定后经PacⅠ酶切,转入AD 293细胞,包装成重组腺病毒Ad-heNOS-EGFP,纯化,鉴定,滴度测定。结果:heNOS cDNA成功地插入到穿梭质粒中,pShuttle-heNOS-EGFP与pAdeasy-1在BJ5183中成功发生了同源重组,得到了重组腺病毒质粒pAdEasy-heNOS-EGFP。重组腺病毒经PCR检测表明携带有目的基因heNOS,滴度约为6.5×1015pfu/L。结论:细菌内同源重组法构建腺病毒载体具有高效、省时、省力的特点,制备出的高滴度重组腺病毒Ad-heNOS-EGFP为勃起功能障碍的基因治疗奠定了基础,携带的EGFP标记基因可以直观地检测靶细胞感染和外源基因的表达情况。     

人端粒酶催化亚单位基因正反义腺病毒表达载体的构建及鉴定

目的: 构建hTERT正义和反义腺病毒表达载体. 方法: 用EcoRⅠ从pGRN145质粒上切下约3.5 kb的人端粒酶全长cDNA片段,然后连入pDC315质粒的EcoRⅠ酶切位点上,经BamHⅠ酶切鉴定出正义和反义表达载体,并对正反义重组质粒进一步测序鉴定其方向. 结果: 经BamHⅠ酶切后,正义质粒形成1.0 6.4 kb两条带. 反义重组质粒为1.0 2.5 3.9 kb三条带,与理论计算值完全一致,测序结果进一步确认了方向的正确性. 结论: 成功构建了hTERT的正、反义腺病毒表达载体.     

应用AdEasy-1腺病毒系统构建含人nm23-H1基因的重组腺病毒质粒

目的应用AdEasy-1腺病毒载体系统制备含人nm23-H1基因的重组腺病毒载体。方法设计带有限制性内切酶KpnⅠ和XhoⅠ双酶切位点的引物,利用PCR法从质粒pMD18-T-nm23-H1上克隆出nm23-H1 cDNA并定向连接至穿梭载体pShuttle-CMV上,行KpnⅠ和XhoⅠ双酶切鉴定和测序。将pAdEasy-1腺病毒骨架载体电转化B J5183感受态细菌,Pm eⅠ酶线性化并去磷酸化处理重组质粒pShuttle-CMV-nm23-H1,并电转化含pAdEasy-1的B J5183感受态细菌,利用卡那霉素筛选,PacⅠ酶切鉴定,重组腺病毒质粒在XLGold-10感受态细菌中大量扩增,产物行PCR鉴定。结果经KpnⅠ和XhoⅠ双酶切pShuttle-CMV-nm23质粒得到460bp的片段,该片段经测序与nm23-H1基因序列一致,重组腺病毒质粒pAdEasy-nm23-H1经PacⅠ酶切后可以得到3.0kb和4.5kb的片段,大量扩增重组腺病毒质粒后行PCR仍然得到460bp的片段。结论利用AdEasy-1腺病毒系统成功构建含人nm23-H1基因重组腺病毒质粒。     

Betatrophin重组腺病毒过表达载体的构建

［摘要］目的: 应用基因同源重组技术,构建及鉴定携带小鼠betatrophin基因Gm6484(NM_001080940)的复制缺陷型重组腺病毒载体,为进一步研究betatrophin的功能奠定基础。方法: 根据基因库中登录的小鼠betatrophin基因Gm6484(NM_001080940)序列,经化学合成得到含BamHⅠ/ AgeⅠ酶切位点的小鼠betatrophin基因全长cDNA质粒,将其酶切后插入到带有增强型绿色荧光蛋白（enhanced green fluorescent protein,EGFP）基因的GV314载体CMV MCS 3FLAG SV40 EGFP中,得到重组病毒穿梭质粒pGV314 betatrophin;经BamHⅠ/ AgeⅠ双酶切后,与线性化的pDC315病毒基因组质粒体外同源重组,构建含有目的基因的腺病毒载体Ad betatrophin,酶切线性化重组腺病毒质粒后转染HEK293T细胞包装成重组病毒颗粒,经在HEK293T细胞反复扩增数代后,利用聚合酶链式反应（PCR）、蛋白质印迹法及测序鉴定重组的腺病毒。结果： 阳性克隆质粒Ad betatrophin在HEK293T细胞中成功包装出重组病毒,经PCR、蛋白质印迹及测序检测表明重组腺病毒包装成功。结论： 成功构建了携带小鼠betatrophin基因的复制缺陷型重组腺病毒过表达载体。     

HBV全基因组逆转录病毒载体的构建及鉴定

目的 构建HBV全基因组逆转录病毒载体,并进行酶切鉴定和测序.方法 用合适的引物,通过PCR方法 扩增pBlueScript sk(-)-HBV载体上的HBV全基因组,分别用Hind Ⅲ和Sd Ⅰ进行PCR产物和pLEGFP-N1载体的双酶切,用连接酶将HBV DNA和载体进行连接,转化连接产物后,进行质粒提取、酶切和测序鉴定.结果 PCR产物凝胶电泳可见3.2 kb条带.pLEGFP-N1-HBV重组质粒酶切结果 电泳后,可看见6.9 kb和3.2 kb的条带,测序结果 表明重组质粒含有HBV全基因组.结论 成功构建了HBV全基因组逆转录病毒载体,为下一步形成稳定的细胞模型奠定基础.     

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.     

APPLICATION OF LORNOXICAM TO PATIENT-CONTROLLED ANALGESIA IN PATIENTS UNDERGOING ABDOMINAL SURGERIES

FOR anesthesiologis s ,treatingpostoperativepainhas alwaysbeen a problem.Althoughopioidshave been provedtobe effective,theirsideeffectscouldnotbeignored.With thedevelopmentofscienceand pharmacology,many drugs with aspectsof satisfactoryanalgesicefficacyand couldbe welltoleratedby patientshave been developed.And lornoxicamisone of them, which isa non-steroidalanti-inflammatorydrug (NSAID ), with analgesic, anti-infl-ammatory,andantipyreticproperties.Itseliminationhalf-time(3 to 5 hours) isle…     

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.     

Development on Adjustable Calibration Marker for Shock Wave Focus

Shock wave lithotripsy （SWL） is a treatment of choice for upper urinary stones. However, this procedure is inappropriate for obese patients because the focus is often unable to reach the target owing to the limited focal distance in shock wave source. Although treating such patients in a blast path may increase the application length of shock wave source, it＇s difficult to find this path on the lithotripter monitor. For this reason, we invented an adjustable calibration marker in order to set an effective focus in the shock wave hath.     

Study on the TCM Pathogenesis of Angiopathic Complications of Type II Diabetes

Excess production of reactive oxygen species(ROS)of mitochondrion mediated by hyperglycemia is the common pathogenesis of angiopathic complications of diabetes.TCM holds that the damp from the dysfunction of spleen.kidney and liver is the causative factor of complications of diabetes.This is similar to the mechanism of Ros resulting in angiopathic complications of diabetes.When the angiopathic complications of type II diabetes mellitus(T2DM)are difierentiated as caused by turbid damp in TCM can be explained as ROS.Since the obstruction of pathogenic damp in channels and collaterals is said to be the main pathogenesis,the treating principle should be dissolving the damp to remove the obstruction.     

Leptin, Ghrelin and TNF-α before and after Hypo-caloric Traditional Chinese Diet and Auricular Acupuncture

INTRODUCTION Obesity is a complex emergent problem, which can be possibly solved not only by the diet but also by the life style and promotion of a constant physical exercise. 1, 2 No doubt careful attentions must be given to the nutritional condition of obese people, the dietary habits, the somatic build (i.e. distribution of fat mass) and the organic functions linked to formation of the fat mass. All the parameters should be constantly monitored before, during and after a diet treatment. 3, 4, 5     

Relationship between Dysglycemia and Carotid Atherosclerosis in Tibetan Population

People with dysglycemia are at high risk for atherosclerotic diseases. This study aims at investigating the atherosclerotic vascular damage in dysglycemia and its metabolic origin in Tibetan population.     

Acupuncture Combined with Spinal Tui Na for Treatment of Primary Dysmenorrhea in 30 Cases

Objective: To observe the therapeutic effects in acupunture treatment of primary dysmenorrhea combined with spinal Tui Na, and study its mechanism. Methods: Thirty cases of the treatment group were treated by acupuncture combined with spinal Tui Na, and thirty cases in the control group were treated by routine acupuncture. Results: The total effective rate was 93.3% in the treatment group, and 73.3% in the control group, with a significant difference between the two groups (P<0.05). Conclusions: Acupuncture combined with spinal Tui Na has good prospects for treatment of primary dysmenorrhea.     

Luo Lingjie's Experience in Treating Chronic Nephropathy

In treating chronic nephropathy,Luo Lingjie,a chief physician,pays attention to regulating the balance between yin and yang,treating infection if present,and removing pathogenic factors.He prescribes gentle drugs and uses carefully strongly warming-tonifying ones,emphasizes the importance of persuading the patient to persist in treatment with medication and nurse one's health for recuperation,and is good at combined use of TCM and western medicine therapy and brings the merits of various therapies into full play,with obvious theraoeutic effects.