小鼠11β- HSD1基因真核表达载体的构建及应用

构建小鼠11β-羟类固醇脱氢酶（11β- HSD1）基因的慢病毒真核表达载体PLJM1-11β-HSD1-GFP,建立小鼠前体脂肪细胞（3T3-L1）高表达11β-HSD 1 基因的稳定感染细胞株,为11β- HSD1基因的功能研究奠定基础。方法利用逆转录聚合酶链反应（RT-PCR）从小鼠肝脏cDNA 中扩增11β-HSD1开放阅读框ORF,构建针对11β-HSD 1 基因的真核表达载体,转化感受态DH5α菌株,抽提质粒并进行测序鉴定。用测序成功的质粒和慢病毒包装质粒共同转染293T细胞,产生慢病毒并转染3T3-L1 细胞。根据绿色荧光效率挑取单克隆细胞团筛选出稳定细胞株,通过Western blot鉴定PLJM1-11β-HSD1-GFP转染成功。结果经酶切、PCR 及测序验证,PLJM1-11β-HSD1-GFP 真核表达载体构建成功,并包装慢病毒,绿色荧光效率90%以上,并利用其慢病毒悬液成功感染3T3-L1 细胞,筛选出的稳定感染细胞株的3T3-L1细胞成功高表达11β-HSD1 蛋白。结论成功构建了11β-HSD 1 基因的真核表达载体,并建立高表达11β-HSD 1 的稳定感染细胞株PLJM1-11β-HSD1-GFP-3T3-L1,为进一步研究11β-HSD 1 基因的功能,特别是在肥胖中的研究奠定了基础。     

共表达野生型p53及siRNA-mdm2质粒的构建及其在PC-3细胞中的表达

目的：构建可同时表达野生型p53 (wt-p53)及siRNA-mdm2的重组真核表达载体用于激素非依赖性前列腺癌的联合基因治疗。方法：利用亚克隆、T-A克隆和PCR技术合成并构建pcDNA3.1-p53、siRNA-mdm2、p53/siRNA-mdm2和siRNA-scramble重组质粒。脂质体法将上述重组质粒转染至PC-3细胞,半定量RT-PCR和Western blotting检测共表达质粒对mdm2和p53表达的影响,MTT法检测共表达质粒转染后PC-3细胞增殖活性。结果：克隆出wt-p53全长及带有U6启动子的siRNA-mdm2序列,经DNA测序证实序列正确,通过连接成功构建上述真核重组表达载体;转染细胞48 h后可见siRNA-mdm2组GFP明显表达; RT-PCR和Western blotting检测显示转染共表达质粒后PC-3细胞中 wt-p53表达增强,mdm2表达下调;MTT检测显示共表达质粒转染后PC-3细胞生长抑制率为40.4%。结论：成功构建p53与siRNA-mdm2共表达质粒,共表达质粒可抑制前列腺癌细胞PC-3的增殖。     

重组质粒pLMP1-p53mt的构建与表达

目的构建含突变型p53基因和EB病毒LMP1基因的双基因真核表达质粒,为研究突变型p53基因和EB病毒LMP1基因在鼻咽癌发生中的相互作用奠定基础.方法通过分子克隆技术,构建含突变型p53基因和EB病毒LMP1基因的真核表达载体pLMP1-p53mt;培养HeLa细胞,采用脂质体lipofectAMINETM 2000将该质粒转入HeLa细胞中,转染后48h,利用免疫细胞化学法研究突变型p53基因和EB病毒LMP1基因的表达情况.结果重组质粒限制性内切酶酶切及PCR鉴定结果与预期一致;观察到转染细胞中突变型p53基因和EB病毒LMP1基因的高效表达.结论成功构建了含突变型p53基因和EB病毒LMP1基因的双基因真核表达质粒.     

INI1调节胃癌细胞增殖、凋亡、侵袭能力的机制研究

目的：探讨INI1在胃癌进展中的作用及其调节胃癌细胞增殖、凋亡、侵袭能力的相关机制。 方法：以荧光定量RT-PCR和Western-blot技术检测胃癌、癌旁组织的INI1表达情况并进行比较;将INI1-GFP真核表达质粒转染人胃癌SGC7901细胞株,MTT法检测肿瘤细胞增殖活性、流式细胞术检测细胞周期,以TUNEL法和流式细胞术检测细胞凋亡情况,细胞划伤试验和侵袭小室试验检测细胞侵袭转移能力。同时,用荧光定量RT-PCR和Western-blot技术检测转染前后细胞株的INI1水平,检测增殖相关基因P16、P21、Cyclin D1、Cyclin A水平,检测凋亡相关基因P53、Bax、Bcl2、Caspase3水平和侵袭相关基因ICAM1、MMP2、MMP9、TIMP1水平。 结果：胃癌组织的INI1表达水平低于癌旁组织。INI1-GFP真核表达质粒转染人胃癌SGC7901细胞株后细胞的增殖和侵袭能力受到抑制、凋亡能力及G0/G1期细胞增高。转染后INI1和P16、P21、P53、Bax、TIMP1表达增高,Cyclin D1、Cyclin A、Bcl2、ICAM1、MMP2、MMP9表达下调,而Caspase3表达无明显变化。 结论：INI1在胃癌癌变、进展中发挥重要作用,这种作用是通过调节胃癌细胞的增殖、凋亡、侵袭能力而实现的。     

RNAi构建p53基因低表达细胞

目的构建p53基因低表达的人且不胎肺成纤维细胞（HELF）。方法利用RNA干扰（RNA interference,RNAi）技术建立p53基因低表达的HELF。采用Real—time PCR法及免疫组织化学SABC法,分别从mRNA和蛋白水平检测不同组（p53基因低表达细胞组、对照细胞组、正常细胞组）HELP的p53基因表达改变。结果转染p53质粒组（低表达组）细胞,p53基因mRNA和蛋白表达水平均较正常细胞组及转染PC质粒组细胞明显降低,差别有意义（P〈0．05）,表达量约是正常细胞的50％;转染PC质粒组（对照组）细胞与正常组细胞p53基因mRNA表达问差异元意义（P〉0．05）.结论1353基因低表达HELF构建成功。     

Vasohibin-2慢病毒过表达载体的构建及相关增殖功能研究

目的:构建Vasohibin-2(VASH2)慢病毒过表达载体,获得稳定表达的肝癌细胞株HepG2,并观察其对HepG2增殖的影响?方法:通过逆转录?PCR技术从细胞总RNA中获得VASH2目的基因,引入NheⅠ和PstⅠ酶切位点,连接到pTA2 vector中,经NheⅠ和PstⅠ双酶切后再连接到Lv-CMV-EGFP vector中,并对重组后的质粒进行双酶切和测序分析;VASH2过表达载体?pVSV-G及delta8.91 3个质粒共转染293T细胞,获得慢病毒感染肝癌细胞株HepG2,经流式细胞仪分选阳性细胞;提取细胞总RNA和总蛋白,利用real-time PCR和Western blot鉴定稳转细胞株中VASH2的表达,用MTT法和细胞周期法检测各组HepG2的增殖能力?结果:成功构建VASH2慢病毒过表达载体,感染肝癌细胞株HepG2后能够稳定高表达VASH2;稳定高表达VASH2的HepG2增殖能力明显增强(P < 0.05)?结论:成功构建了VASH2慢病毒过表达载体,并发现VASH2可以促进HepG2的增殖能力,这为进一步研究VASH2在肝癌中的功能及作用机制奠定了基础?     

稳定表达野生型p53基因人骨肉瘤细胞株的建立与鉴定

目的建立稳定表达外源性野生型p53基因的人骨肉瘤细胞株(U-2 OS),为进一步研究野生型p53基因在骨肉瘤自杀基因治疗中的协同作用提供体外实验模型建立与鉴定的方法。方法利用分子生物学基因克隆技术将人类野生型p53基因cDNA片段插入到表达载体pIRES-EGFP中,得到重组质粒pIRES-EGFP-p53,并通过PCR、酶切电泳等方法进行质粒鉴定;然后用该重组质粒转化大肠杆菌BL21细胞,转化菌落经PCR扩增后,将提取的质粒DNA用脂质体介导的转染方法导入U-2 OS细胞中,经荧光显微镜下人工筛选得到稳定转染的骨肉瘤细胞系。结果成功地构建出包含有野生型p53 cDNA片段的重组质粒pIRES-EGFP-p53,通过PCR、酶切电泳等方法鉴定质粒大小和位点均符合实验设计;并将该重组质粒成功导入人骨肉瘤细胞株U-2 OS细胞中,经荧光显微镜下人工筛选得到稳定转染的骨肉瘤细胞系,命名为U-2-p53 OS。转染后的骨肉瘤细胞出现散在的凋亡现象。结论利用基因转染技术,建立了稳定表达外源性野生型p53基因的人骨肉瘤U-2-p53 OS细胞系,为进一步研究野生型p53基因在骨肉瘤自杀基因治疗中的协同作用奠定了基础。     

小鼠HuR真核表达载体构建及对Lewis肺癌细胞增殖和侵袭的影响

目的 构建小鼠同源的人抗原R (HuR)基因真核表达载体,观察HuR过表达对Lewis肺癌(LLC)细胞增殖和侵袭的影响.方法 从LLC细胞中抽提总RNA,RT-PCR扩增HuR cDNA,基因工程方法将PCR片断克隆至真核表达载体pEGFP-N1的多克隆位点.重组质粒经EcoRI和SmaI双酶切鉴定和测序后,使用LipofectamineTM2000转染LLC细胞.Western blotting检测HuR在细胞中的表达.MTT和Transwell系统分别检测细胞增殖和侵袭能力.结果 经酶切、测序鉴定,小鼠HuR基因正确插入到pEGFP-N1的多克隆位点,获得pEGFP-HuR;Western blotting显示转染组与未转染组比较,HuR蛋白表达、LLC细胞增殖能力和侵袭能力均显著增强.结论 HuR过表达可提高肿瘤细胞的增殖和侵袭能力.     

白细胞介素-23基因的克隆及真核双表达载体的构建

[目的]通过分别克隆白细胞介素-23（IL-23）基因的双亚基p19和p40，构建pcDNA3-IL-23真核双表达载体，为通过IL-23基因转染树突状细胞（dendritic cell，DC）增强其介导的免疫抗肿瘤作用提供基础。[方法]一步法从小鼠脾脏及胸腺中提取p19和p40总RNA，RT—PCR法扩增p19和p40的cDNA，扩增产物与pMD18-Tvector连接并热转化至大肠杆菌JM109，PCR法筛选阳性克隆，提取质粒并进行DNA的测序鉴定，将pMD18-p19和DMD18-p40分别限制性酶切，在对pcDNA3表达载体限制性酶切后将切胶回收的p19和p40片段分别克隆至pcDNA3．0表达载体，对阳性质粒进行XhoI/KpnI双酶切检测，琼脂糖凝胶电泳分析。[结果]脾脏及胸腺中提取p19和p40总RNA电泳鉴定是完整的，克隆的p19和p40 cDNA经测序鉴定与Genebank中序列完全一致。构建的pcDNA3．0-p19和pcDNA3．0-p40质粒分别限制性酶切后得到了593bp和1028bp的基因片段；构建的pcD．NA3．0-IL-23表达载体限制性酶切后得到了1．62kbD的p19＋p40片段。[结论]成功克隆了小鼠IL-23基因，并分别构建了pcDNA3-p19、pcDNA3-p40和pcDNA3-IL-23真核表达载体，为IL-23基因转染DC来增强其免疫活性创造了条件。     

抑癌PTEN基因联合p53基因转染对前列腺癌PC-3m细胞凋亡的影响

目的研究抑癌PTEN基因联合p53基因转染对前列腺癌PC-3m细胞凋亡的影响。方法构建表达载体：空质粒pEGFP—N1、pEGFP—N1-PTEN质粒、pEGFP—N1-p53质粒及pEGFP—N1-PTEN—p53质粒,体外分别转染到前列腺癌Pc-3m细胞中,观察它们转染后的荧光表达情况;采用RT—PCR法检测目的基因表达;Westernblotting法检测目的PTEN蛋白和P53蛋白的表达;用MTT法观察细胞增殖抑制情况并绘制生长抑制曲线;AnnexinV—FITC／PI双染流式细胞术检测PTEN基因和p53基因对前列腺癌PC-3m细胞凋亡的影响。结果荧光显微镜下观察到PTEN、p53及两个基因同时在PC-3m细胞系中成功表达;RT—PCR检测结果显示,与PTEN基因单转染组、p53基因单转染组和空载体转染组相比联合转染组mRNA在PC-3m细胞系中表达明显增加俨〈0．05）;Westernblotting法检测同样发现,联合转染组PTEN蛋白及P53蛋白表达明显高于PTEN基因单转染组、p53基因单转染组和空载体转染组俨〈0．05）;联合转染组细胞凋亡率明显高于空载体转染组、PTEN基因单转染组和p53基因单转染组（P〈0．05）。结论PTEN基因与p53基因联合转染能诱导前列腺癌PC-3m细胞凋亡．这种联合转染可能对前列腺癌的基因治疗具有潜在的应用价值。     

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.