VEGF—C真核表达载体的构建和体外表达

目的：构建血管内皮生长因子C(VEGF-C)基因的真核表达栽体，检测其在真核细胞CHO中的表达。方法：根据人VEGF—C cDNA的序列，设计合成一对特异性引物，用RT—PCR法克隆乳腺癌细胞MCF-7VEGF—C基因的cDNA，回收PCR产物连接于克隆载体。扩增，质粒提取，酶切鉴定并进行基因序列鉴定。酶切回收VEGF—C cDNA全长的基因片段，与真核表达栽体pcDNA3．1(-)连接重组质粒进行酶切鉴定。采用脂质体转染法将构建的pcDNA3．1(-)，VEGF-C转染至CHO细胞中，G418加压筛选培养。最后用Westerm—blotting法检测细胞培养上清以及裂解细胞中的VEGF-C蛋白。结果：基因测序证实RT-PCR产物包含VEGF-C cDNA全长。重组peDNA3．1(-)中含 有VEGF—C cDNA全长序列，Westem—blotting检测到细胞培养上清中以及细胞内有VEGF-C蛋白存在。结论：成功构建了人类VEGF-C真核表达载体并检测到载体在真核细胞中的表达。     

人端粒酶催化亚单位(hTERT)特异性锤头状核酶真核表达载体的构建及鉴定

目的 设计并合成人TERT特异性的锤头状核酶(hammerhead ribozyme)基因并构建其真核表达载体.含有核酶靶基因hTERTcDNA保守序列的T载体pMD18-T-hTERT的构建.方法 运用计算机软件人工设计并合成核酶基因(RZ),将核酶基因克隆到真核表达载体pcDNA 3.1(+)中,重组子由BamH I和EcoR I酶切,琼脂糖凝胶电泳鉴定及DNA测序.RT-PCR法扩增目的 基因cDNA保守序列,与pMD-18进行T-A连接,重组子经菌液PCR及测序鉴定.结果 RZ人工合成后与pcDNA 3.1(+)连接,酶切电泳及DNA测序证实合成的核酶基因序列正确并已被准确克隆入pcDNA 3.1(+)的BamH I和EcoR I位点之间,命名为pcDNA 3.1-RZ.220bp的hTERT基因cDNA保守序列准确克隆于pMD18-T,命名为pMD18-T-hTERT.结论成功合成hTERT特异性的锤头状核酶基因并构建了该基因的真核表达载体,以及核酶靶基因的pMD18-T-hTERT载体.     

诱导型一氧化氮合酶基因真核表达载体的构建

目的 构建含有人诱导型一氧化氮合酶基因真核表达载体pcDNA3-iNOS。方法 采用分子生物学技术，以Hind Ⅲ和XbI I双酶切pSPORT-iNOS，电泳回收3．96kb编码人iNOS cDNA序列．克隆入真核表达栽体pcDNA3的Hind Ⅲ和XbI I位点。结果 重组真核表达载体pcDNA3-iNOS经酶切鉴定证明iNOS基因正向插入真核表达载体中，用人iNOS基因特异性引物，PCR分析重组质粒和进行碱基序列的测定均证明重组质粒中含有人iNOS基因序列。结论 构建的真核表达栽体携有人iNOS cDNA序列，并且含有巨细胞病毒强启动子、ploy(A)加接信号和neo标志基因，具有转染多种哺乳类细胞通用性，可用于iNOS基因的真核表达及调控的研究。     

亚细胞定位PTEN基因真核表达载体的构建与鉴定

目的：构建人野生型亚细胞定位PTEN基因真核表达载体,为进一步研究其抗肿瘤作用奠定基础。 方法：以胎盘组织RNA为模板,利用RT-PCR技术扩增目的基因片段。PCR产物与T载体连接,转化大肠杆菌,获得T-PTEN质粒,进行酶切鉴定和测序。以T-PTEN质粒为模板,利用PCR技术将核定位信号（NSL）加入PTEN序列。PCR产物与T载体连接,转化大肠杆菌,获得T-NSL-PTEN质粒。真核表达载体pcDNA3.1及T-NSL-PTEN质粒经EcoRⅠ和BamHⅠ双酶切后连接,转化大肠杆菌,获得重组载体pcDNA3.1-NSL-PTEN,进行酶切和测序鉴定。结果：重组质粒PUM-PTEN酶切在1　200　bp处见目的片段,与预期结果符合。测序结果显示基因序列与目的基因完全一致;重组质粒PUM-NSL-PTEN酶切在1　200 bp处见目的片段,测序结果显示基因序列与设计一致,核定位信号成功加入;重组质粒pcDNA3.1-PTEN酶切在1 200 bp处见目的片段,测序结果显示基因序列与目的基因相同;重组载体pcDNA3.1-NSL-PTEN经双酶切和测序证实了其正确性EcoRⅠ和BamHⅠ双酶切在1　200 bp处见目的片段,与预期结果一致。测序结果显示,核定位信号成功加入,其后是阅读框架正确的PTEN基因序列。结论：成功构建可表达亚细胞定位PTEN的真核表达载体pcDNA3.1-NSL-PTEN。     

人巨细胞病毒IE1真核表达载体的构建与表达

目的构建人巨细胞病毒（HCMV）IEl真核表达载体，观察其在真核细胞内的表达，为HC—MVIEl核酸疫苗的相关研究奠定基础。方法将质粒pNEBl93-IEl用Sal I、BamH I双酶切与载体pEGFP—C1连接构建重组载体pEGFP—C1-IEl；双酶切鉴定后，取重组载体pEGFP—C1-IEl用EcoR I 、Hind Ⅲ／双酶切与载体pcDNA3．1（-）连接构建重组质粒pcDNA3．I（-）-IEl，双酶切和测序鉴定；将重组质粒pcDNA3．1（-）-IEl转染HeLa细胞，RT—PCR检测IElmRNA的表达。结果重组载体pEGFP—C1-IEl和pcDNA3．1（-）-IEl双酶切后均可切出约1476bp目的片段；重组载体pcDNA3．1（-）-IEI测序结果登录C,enBank，作BLAST分析，含有1476bp目的基因片段，无碱基错配和移码突变，与读码框完全-致；转染重组载体pcDNA3．1（-）-IEl的细胞中可扩增出约1476bp的目的条带。结论成功地构建了真核表达载体pcDNA3．1（-）-IEl，且其能在真核细胞内袁达。     

猪带绦虫六钩蚴期特异性抗原基因真核表达质粒pcDNA3.1/TSO45-4B的构建

目的：构建表达猪带绦虫六钩蚴期特异性抗原基因TS045-4B的真核表达质粒pcDNA3．1／TS045-4B。方法：全基因合成TSO45-4B的基因序列，并利用PCR扩增该基因序列，将其插入真核表达载体pcDNA3．1，经酶切、测序鉴定。结果：经酶切和测序鉴定表明所构建的重组表达质粒中含有TSO45-4B基因。结论：成功构建pcDNA3．1／TS045-4B重组质粒。     

人碱性成纤维细胞生长因子真核表达载体的构建及表达

目的: 构建研究人碱性成纤维细胞生长因子(bFGF)真核表达载体,并在体外进行表达和检测.方法: 从骨髓基质干细胞中分离总RNA,进行RT-PCR 获得人bFGF cDNA.测序证实其结果正确后,构建真核表达载体.并经BamHⅠ/EcoRⅠ双酶切、PCR及测序鉴定.利用Blast程序,搜索NCBI GenBank中与重组质粒(pVAX1-bFGF)中编码bFGF基因同源的序列.通过脂质体将重组质粒转染入骨髓基质干细胞,使用间接免疫荧光法进行表达产物检测.结果: 经EcoRⅠ/Pst BamHⅠ/EcoRⅠ双酶切、PCR及测序鉴定证实,人bFGF基因成功地克隆到真核表达载体pVAX1中;pVAX1- bFGF中编码bFGF的序列与GenBank中所报道的bFGF编码序列完全一致;间接免疫荧光结果显示转染重组质粒的细胞表面有绿色荧光.结论: 成功地构建了人bFGF真核表达载体,其可以在体外进行表达.     

人Fn14基因真核重组质粒的构建及其表达

目的构建人成纤维细胞生长因子诱导早期反应蛋白14（fibroblast growth factor—inducible 14，Fn14）基因真核重组质粒及其表达。方法从人肝细胞癌组织抽取总RNA，RT—PCR扩增出Fn14基因全长cDNA，经测序正确后，核酸内切酶EcoR I、Xba I酶切PCR产物，亚克隆人pcDNA3．1-Myc载体，重组质粒pcDNA3．1-Myc—Fn14经酶切及测序鉴定正确后转染COS-7细胞，通过免疫组织化学DAB法检测Myc—Fn14融合蛋白的表达。结果重组质粒pcDNA3．1-Myc—Fn14经EcoR I、Xba I酶切及测序鉴定正确，重组质粒包含人Fn14基因完整编码区。免疫组织化学检测结果显示，重组质粒转染COS-7细胞后成功表达Myc—Fn14融合蛋白，转染空载体pcD—NA3．1-Myc的COS-7细胞未见Myc—Fn14融合蛋白表达。结论构建了人Fn14基因真核表达载体，该重组质粒可表达含Myc-Fn14的融合蛋白，为研究Fn14功能奠定了基础。     

真核表达载体pcDNA3.1-MAGE-1的构建

目的：构建含MAGE—1基因的重组真核表达质粒。方法：用RT—PCR方法从人肝细胞肝癌组织中扩增出MAGE-1基因cDNA序列，克隆至pGEM—T载体，测序证实基因碱基序列无误后，再克隆至真核表达载体pcDNA3.1( )，构建了pcDNA3.1—MAGE—1重组质粒。结果与结论：RT—PCR获得长度为927bp的阳性产物，经T载体和pcDNA3.1( )真核表达载体克隆、酶切鉴定及序列分析后。证实真核表达质粒pcDNA3．1—MAGE—1构建成功。     

组织蛋白酶L基因真核表达质粒的构建与鉴定

目的:构建组织蛋白酶L(CTSL)基因的真核表达质粒并进行表达鉴定.方法:采用RT-PCR技术从人卵巢癌组织总RNA中逆转录CTSL基因的cDNA全长,克隆到pMDl8-T载体上;亚克隆至pcI)NA3.1载体,重组阳性克隆进行酶切及测序鉴定,重组质粒瞬时转染HO8910细胞,RT-PCR和westeIn-blot检测CTSL基因和蛋白表达.结果:PCR克隆出CTSL cDNA全长,成功克隆人pMD18-T载体,亚克隆至pcDNA3.1载体,重组阳性克隆酶切及测序鉴定证实CTSL基因已正确插入pcD-NA3.1载体.RT-PCR和Western-blot结果证实CTSL基因能够在HO8910细胞中正确表达.结论:成功构建了CTSL基因的真核表达质粒,为下一步探讨CTSL基因在卵巢癌中的作用提供了实验基础.     

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.     

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.     

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…     

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.     

CLINICAL SIGNIFICANCE OF SERUM CYTOKINES IL-1β,sIL-2R,IL-6,TNF-α,AND IFN-v IN ACUTE CORONARY SYNDROME

Objectives To explore serum cytokines levels (including IL-1 β, sIL-2R, IL-6, TNF-α, and IFN-v) and their significance in patients with acute coronary syndrome (ACS) and the subsequent follow-ups, with attempt to estimate the role of various serum inflammatory markers in the diagnosis and assessment of ACS.Methods The study population include 40 patients with acute myocardial infarction (AMI), 40 patients with unstable angina pectoris (UAP), and 40 controls. Among the 80 patients, 60 patients attended a follow up 4 months later. Serum inflammatory markers including IL-1 β, sIL-2R, IL-6, TNF-α, and IFN-v were measured by enzyme linked immunosorbent assay.Results Serum IL- 1 β, sIL-2R, IL-6, TNF-α were significantly higher in AMI group or UAP group compared to the control group and became significantly lower 4 months later in the follow-up patients. Serum levels of IFN-v shows no significant difference between AMI group or UAP group and controls, also showing no significant change when measured in follow up patients. There was no correlation between serum creatine kinase-MB isoenzyme levels and serum inflammatory markers either in UAP or AMI group. Furthermore, when divided into two subgroups using Wagner's QRS scoring system in the AMI group, there is no difference of each serum inflammatory marker between ≤ 6 scores group and ＞ 6 scores group.Conclusion Serum levels of certain inflammatory markers may have some diagnostic value for ACS, and can be a useful marker reflecting disease stability.     

Possible Spread of adenovirus type 3 from poultry to humans ：indirect evidence from an outbreak in China

Objective:To explore the epidemiology and etiology for an outbreak of acute respiratory tract infection that occurred in one county of Jiangsu Province, China 2004. Methods: Only cases meeting the case definition were included in the study. We reviewed the medical records of the cases who were admitted to the local hospitals, interviewed cases by a standard questionnaire, and then described the epidemiotogic features and analyzed risk factors by means of a case-control study. We collected pharyngeal swab specimens and sent them to different laboratories for isolation and culture. The laboratory used different detection methods such as DIP, PCR, electron microscope examination and microneutralization assay, to identify and then type the positive specimens. Results:A total of 871 cases were reported during the period from April 18 to July 4,2004. The distribution of onset times presented two peaks, one in late May and another in middle June. The epidemic occurred mainly in the elementary and junior high schools in ten townships of one county, and the mean age of the cases was 12 years (range 7 months to 18 years). The course of the disease was acute, and was characterized by fever accompanied with sore throat and tonsillitis. The WBC count of cases was normal or elevated. The mean duration of illness was 5 days (range 2 to 12 days). No fatalities from illness were reported. A case-control study indicated that the possible risk factors were close contact with a case and/or poultry before onset and sharing of towels among members of the family. The typical CPE was observed through inoculating pharyngeal swab specimens into the HEP-2 cell cultures in different laboratories. An infection of adenovirus type 3 was verified by detecting positive specimens in different methods. Conclusion:This investigation demonstrated that the acute respiratory infection in cases was caused by adenovirus type 3. Cases occurred in over 70 schools in ten townships in 2004, and the route of transmission was possibly close contact with cases or droplet transmission.