小鼠 T-bet基因重组腺病毒载体的构建

[目的] 构建小鼠 T-bet基因重组腺病毒载体,为 T-bet基因在支气管哮喘治疗中的作用研究提供有效的 T-bet生物表达系统.[方法] 采用内切酶从质粒 T-bet/GFP-RV中切获约 1.7 kb的小鼠 T-betcDNA片段,与穿梭质粒 pShuttle连接,再通过稀有酶切位点将含 T-betcDNA的表达盒与 Adeno-X腺病毒载体骨架连接,构建重组载体 pAdeno-T-bet,测序鉴定无错配及插入移位等 DNA顺序改变,并转染 HEK293细胞,出现 CPE后取含病毒上清的细胞培养液抽提病毒 DNA行 PCR鉴定.[结果] PCR及酶切证实: T-betcDNA正确克隆到穿梭质粒 pShuttle中,带 T-betcDNA的表达盒成功重组到腺病毒载体基因组 E1A缺失区,并在 HEK293细胞中成功包装出具有感染活性的重组腺病毒 pAdeno-T-bet.[结论]本实验成功构建了小鼠 T-bet基因重组腺病毒载体,并在 HEK293细胞中成功包装出重组腺病毒.     

利用Adeasy-1系统构建npcl基因非复制型腺病毒载体并鉴定

目的以复制缺陷的腺病毒为载体,细菌内同源重组法构建有npcl基因的腺病毒载体.方法利用限制性内切酶kpnl HindⅢ从带有朊病毒启动子的质粒prp-pro-mlpcl中切下目的基因npcl-1,克隆至穿梭质粒PAdtrack-CMV,再与PAdeasy-1在大肠杆菌BJ5183中进行同源重组,经抗性筛选和酶切鉴定的质粒再利用脂质体转染人293例细胞中扩增,利用Adeasy-1系统上的绿色荧光蛋白鉴定病毒,RT-PCR鉴定目的基因的表达.结果切酶切鉴定,正确的目的基因片断已克隆至穿梭质粒PAdtrack-CMV;卡那霉素进行抗性筛选及Pac Ⅰ酶切鉴定证实腺病毒重组质粒构建成功.Pac Ⅰ酶切线性化的重组质粒导入293细胞3d后见明显的绿色荧光蛋白表达.回收病毒,可重复感染293细胞,证实有感染能力的病毒颗粒包装成功.结论利用腺病毒载体系统Adeasy-1可构建能成功表达Pac Ⅰ基因的腺病毒载体,为对Niemann pick' s病C型的进一步研究提供了条件.     

人脂联素基因重组腺病毒的构建与鉴定

目的:构建含有人脂联素基因apM1的重组腺病毒载体,制备能表达人脂联素蛋白的重组腺病毒,为脂联素用于体内外干预动脉粥样硬化奠定基础.方法:自质粒pGEM-T-apM1上扩增两端带有Sal Ⅰ和Hind Ⅲ酶切位点的全长apM1基因,将PCR产物和穿梭质粒pShuttle-CMV经Sal Ⅰ和Hind Ⅲ双酶切后,连接、转化、筛选,进行PCR鉴定后送双向测序.将鉴定正确的重组质粒pShuale-CMV-apM1用Pme Ⅰ酶切使其线性化后与腺病毒骨架质粒pAdEasy-1共转BJ5183菌,进行细菌内同源重组,筛选、鉴定、扩增,Pac Ⅰ酶切后用LipoefctaminTM2000转染低代数的HEK293包装细胞,进行包装出毒.结果:重组穿梭质粒pShuttle-CMV-apM1经PCR和测序鉴定正确,与腺病毒骨架质粒pAdEasy-1同源重组成功,转染293细胞进行包装,产生的病毒经鉴定正确,并且无具有复制能力的腺病毒存在,生物安全性高.结论:成功的制备了apM1基因重组腺病毒,可进一步用于脂联素干预动脉粥样硬化的研究.     

腺病毒载体介导的大鼠DNA多聚酶β重组体的构建及其在PC12细胞中的表达

[目的]为探讨DNA多聚酶β在神经细胞损伤中的作用与机制,构建其重组腺病毒载体,并在PC12细胞中表达.[方法]RT-PCR获取大鼠DNA多聚酶β(POLβ)的编码序列,TA克隆测序,酶切POLβ基因并连入穿梭质粒pAdTrack-CMV,电转至含腺病毒pAdeasy骨架质粒的大肠杆菌BJ5183.重组腺病毒质粒(pAd-polβ)和Lipofectamine2000转染293细胞,用重组腺病毒感染PC12细胞.[结果]10个TA克隆中有3个克隆的序列与GENE BANK中大鼠POLβ cDNA序列完全一致,同源重组检测时30个克隆中有8个含目标条带.DNA序列正确的POLβ重组腺病毒质粒转染293细胞后,感染Ad-polβ的293及PC12细胞荧光显微镜下可见绿色荧光,重组腺病毒Ad-polβPCR鉴定含目标条带,Ad-polβ感染PC12细胞Western Blot检测到POLβ蛋白表达.[结论]成功构建了大鼠DNA多聚酶β的腺病毒重组体并在PC12细胞中表达     

含有NURR1基因的重组复制缺陷性腺病毒的构建和鉴定

[目的]构建并鉴定携带NURR1基因的重组复制缺陷腺病毒高效表达载体,为基因调控神经干细胞分化后治疗帕金森病奠定基础.[方法]将测序鉴定正确的NURR1基因插入穿梭质粒pTrack-CMV后,与Adeasy整合,重组Adeasy质粒在肾293A细胞内包装成病毒,PCR鉴定并测定病毒滴度,电镜鉴定病毒颗粒.[结果]成功构建的穿梭质粒pTrack-CMV-NURR1与pAdeasy整合后,重组Adeasy质粒在肾293A细胞内包装和复制时,细胞病变效应(cytopathogeniceffect,CPE)明显,PCR鉴定病毒DNA中有NURR1基因,病毒滴度测试表明病毒含量高,电镜显示病毒为多面体.[结论]成功构建出含有NURR1基因的重组复制缺陷性腺病毒表达载体.     

含AFP启动子腺病毒载体构建的基础研究

[目的]为提高基因治疗载体的靶向性,在现有的溶瘤性腺病毒基础上,应用细菌内同源重组方法构建含AFP启动子和E1A基因的条件复制性腺病毒载体。[方法]应用限制性内切酶以及体外重组技术获取目的片段AFP—AP—IRES—E1Am并进行重组质粒的筛选;将目的片段插入Pshuttle穿梭质粒中;重组的Pshuttle质粒应用PmeI线性化,与含腺病毒骨架DNA、删除了腺病毒E1、E3区的pAdEasyl质粒在BJ5183大肠杆菌细胞中同源重组形成新重组体;抽提重组体DNA,用PacI酶切后,转染至人胚肾细胞株HEk293细胞中进行复制包装,扩增纯化;进行病毒检测。[结果]经用具有Amp抗性及kan抗性的培养板和多种限制性内切酶酶切筛选,证实应用同源重组方法构建了含AFP启动子和目的基因E1A的腺病毒载体;该重组腺病毒可转染HEk293细胞,并进行有效复制。[结论]成功构建了具有特异靶向性的条件复制腺病毒载体,为进一步研究该腺病毒的功能提供了条件。     

HBx和mIL-12双基因重组腺病毒的构建

目的 构建携带双基因HBx和mIL-12的重组腺病毒Ad-HBx-mIL-12.方法 采用酶切、连接的方法分别将基因HBx和mIL-12连接到穿梭质粒载体pAdenoVator-CMV5.将构建正确的穿梭质粒pAdV-HBx-mIL-12经EcoR Ⅰ酶切线性化后,转化于含腺病毒骨架质粒pAdenoVatorΔE1/E3的BJ5183感受态细菌,实现细菌内同源重组.将鉴定正确的重组腺病毒质粒pAd-HBx-mIL-12经Pac Ⅰ酶切线性化后,以脂质体法转染至293细胞,包装并扩增获得携带双基因HBx和mIL-12的重组腺病毒Ad-HBx-mIL-12.结果 经鉴定携带HBx和mIL-12双基因的重组腺病毒构建成功,并可在293细胞中有效表达.结论 成功构建了携带双基因HBx和mIL-12的重组腺病毒Ad-HBx-mIL-12,为探讨其联合抗肿瘤机制及后续基因治疗奠定了基础.     

可共表达骨保护素和碱性成纤维生长因子的复制缺陷型重组腺病毒

目的 构建共表达骨保护素(OPG)和碱性成纤维生长因子(FGF2)基因的复制缺陷型重组腺病毒,为应用基因工程技术联合组织工程技术治疗牙周病的研究打下基础.方法 以双表达质粒pIRES-OPG-FGF2为基础,构建含OPG和FGF2两种基因的双顺反子腺病毒穿梭质粒pSC/OPG-I-FGF2,通过与AdEasy腺病毒系统中的腺病毒骨架质粒进行同源重组获得可共表达两种基因的双顺反子复制缺陷型重组腺病毒质粒,经限制性内切酶线性化,转染复制缺陷型重组腺病毒DNA分子至293细胞.结果 293细胞出现典型病变,RT-PCR鉴定OPG和FGF2基因有转录,Westernblot显示可表达目的 蛋白OPG和FGF2.结论成功获得一株可共表达两种目的 基因的双顺反子复制缺陷型重组腺病毒FGAd/OPG-I-FGF2.     

人NP9基因蛋白重组腺病毒的制备

目的：制备表达人NP9蛋白的复制缺陷型重组腺病毒。方法：酶切pMD18T-NP9质粒获得NP9基因编码区序列并克隆至芽梭载体构建重组pAcTrack-CMV-NP9载体，线性化后与pAdEasy-1共转化BJ5183，通过同源重组得到重组的pAD-NP9病毒载体将重组腺病毒载体转染HEK293包装细胞制备重组腺病毒。结果：酶切鉴定得到阳性pAD-NP9重组腺病毒载体，该载体能有效转染HEK293细胞并在细胞内成功包装，转染3d后可以观察到绿色荧光蛋白(CFP)表达并逐渐增多、增强：结论：成功构建了NP9基因的重组腺病毒载体并制备重组腺病毒颗粒，为进一步研究NP9基因的功能及应用NP9进行基因治疗奠定基础。     

Hyper-IL-6融合基因重组腺病毒的构建及其在肝细胞中的表达

目的 在扩增出融合基因Hyper-IL-6的基础上,构建重组腺病毒Ad-HIL-6.用Ad-HIL-6感染人肝细胞LO2,观察细胞内Hyper-IL-6 rnRNA和蛋白的表达情况.方法 将Hyper-IL-6克隆至穿梭质粒,线性化后与腺病毒骨架质粒在BJ5183细菌内同源重组,构建重组腺病毒质粒.线性化的重组腺病毒质粒转染293细胞,PCR进一步证实重组腺病毒的存在.RT-PCR检测Ad-HIL-6感染LO2细胞后Hyper-IL-6基因的表达情况,Western blot法检测Ad-HIL-6感染LO2细胞后Hyper-IL-6的蛋白表达情况.结果 酶切及PCR鉴定表明同源重组成功,重组腺病毒质粒转染293细胞后可见绿色荧光,感染293细胞得到大量病毒.重组腺病毒Ad-HIL-6能在LO2细胞中表达出Hyper-IL-6基因和蛋白,条带分另q为1600bp和60KD左右.结论 重组腺病毒AdHIL-6构建成功,为以后进行基因治疗奠定基础.     

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.     

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     

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.     

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…     

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.