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1.
人碱性成纤维细胞生长因子真核表达载体的构建及表达   总被引:2,自引:0,他引:2  
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.  相似文献   

2.
目的:构建弓形虫致密颗粒抗原GRA7的真核重组表达质粒。方法:设计GRA7的特异引物,采用多聚酶链反应(PCR)技术从弓形虫RH株基因组DNA中扩增编码GRA7的基因片段,经克隆至pMD18-T载体后,亚克隆至真核表达载体pVAX1而构建真核重组表达质粒pVAX1-GRA7。结果:PCR扩增出GRA7基因的特异片段,所获克隆的序列正确,并被亚克隆到真核表达载体pVAX1,构建了真核重组表达质粒pVAX1-GRA8。结论:成功构建了GRA7的真核重组表达质粒pVAX1-GRA7。  相似文献   

3.
人中性粒细胞多肽1,3真核表达载体的构建与鉴定   总被引:3,自引:3,他引:0  
目的:扩增人中性粒细胞多肽1,3(HNP1,3)基因片段,构建真核表达载体pcDNA3.1/V5-His-TOPO/HNP1,3。方法:从健康人中性粒细胞中提取总RNA,用RT-PCR方法扩增出HNP1,3基因完整的cDNA片段,应用TA克隆插入pMD18-T载体,经酶切鉴定及序列分析确证后,将其亚克隆至真核表达载体pcDNA3.1/V5-His-TOPO中。结果:从人中性粒细胞中克隆出人HNPl1,3基因,经测序分析与GenBank公布的人HNP1,3核苷酸序列同源性为100%,成功地构建了真核表达载体pcDNA3.1/V5-His-TOPO/HNP1,3。结论:真核表达载体pcDNA3.1/V5-His-TOPO/HNP1,3的成功构建,为后续重组基因的真核/表达及其对HIV-1抑制作用的研究奠定了实验基础。  相似文献   

4.
目的:构建含人cD81基因的真核表达载体,探讨CD81在COS-7细胞的表达,为研究丙型肝炎病毒(1-ICV)与cD81相互作用奠定基础.方法:从我们构建的含人CD81全编码基因载体pMD18-T-CD81,应用双酶切回收基因片段,定向克隆入真核表达载体pVAX1;通过脂质体介导的基因转染技术将pVAX1-CD81和空载体转入COS-7细胞;应用抗CD81单克隆抗体通过间接免疫荧光法检测COS-7细胞的表达产物.结果:重组的含CD81基因的真核表达载体pVAX1-CD81经酶切和PCR鉴定分析正确,并证明在COS-7细胞表面有效地表达CD81蛋白.结论:成功构建含CD81全编码基因的真核表达载体pVAX1-CD81,并在COS-7细胞表面有效表达CD81分子,该转染细胞可作为研究CD81在HCV感染中的作用提供模型.  相似文献   

5.
目的:构建真核表达质粒pVAX1-Der p 1,检测质粒编码的重组蛋白在真核细胞293T中的表达,为进一步的动物实验打下基础。方法:分离屋尘螨总RNA,根据GenBank已公布的Der p 1核酸序列设计引物,PCR扩增Der p 1编码基因,以其全长为目的基因,定向克隆至真核表达载体pVAX1,将其转化大肠杆菌DH...  相似文献   

6.
目的:构建pEGFP-N1/IL-37b真核表达载体,并检测其在THP-1细胞中的表达情况。方法:从人PBMCs中提取总RNA,利用RT-qPCR技术扩增出IL-37b基因编码区序列,克隆至pEGFP-N1真核表达载体,将构建的重组质粒pEGFP-N1/IL-37b转染到THP-1细胞中,通过RT-qPCR和Western blot检测IL-37的表达。结果:双酶切及基因测序结果显示 IL-37b基因正确插入真核表达载体pEGFP-N1中;RT-qPCR和Western blot结果显示转染THP-1细胞后,IL-37表达水平明显升高(P<0.01)。结论:成功构建了新型抗炎因子IL-37真核表达载体pEGFP-N1/IL-37b,为进一步研究IL-37功能及与相关疾病的关系奠定基础。  相似文献   

7.
目的构建带有报告基因EGFP的hIL-10真核表达载体。方法通过RT-PCR方法从人外周血淋巴细胞中扩增出IL-10基因,构建IL—10基因和报告基因EGFP基因真核表达载体pIRES2-EGFP—hIL-10,经PCR、酶切、测序等方法进行鉴定,紫外分光光度计测定质粒浓度及纯度。结果酶切、PCR及测序证实pIRES2-EGFP—hIL-10载体序列正确。结论成功构建真核表达载体pIRES2-EGFP—hIL-10,可为后续器官移植免疫耐受的研究奠定基础。  相似文献   

8.
小鼠血管抑素基因的克隆、测序与真核表达载体的构建   总被引:1,自引:0,他引:1  
目的:克隆小鼠血管抑素(mAS)基因,测序并构建其真核表达载体。方法:从小鼠肝组织中提取总RNA,用RT-PCR方法将mAS的cDNA扩增出,克隆到pcDNA3真核表达载体中,测定其DNA序列。结果:测序结果表明我们克隆的血管抑素基因,其序列与GenBank中鼠的mAS基因序列有4个碱基不同,所编码的氨基酸有3个发生突变。结论:已成功构建鼠mAS的真核表达载体,为进一步应用AS进行肿瘤基因治疗研究打下基础。  相似文献   

9.
目的:克隆小鼠共刺激分子B7-1基因,测序并构建其真核表达载体。方法:从小鼠脾组织中提取总RNA,用RT-PCR方法将B7-1的DNA扩增出,克隆到真核表达载体pcDNA3中,测定其cDNA序列。结果:测序结果表明我们克隆的B7-1基因序列与GenBank中序列有1个碱基不同,所编码的氨基酸发生突变。结论:已成功构建小鼠B7-1的真核表达载体,为进一步应用B7-1进行肿瘤基因治疗打下基础。  相似文献   

10.
目的:通过克隆人核糖体蛋白L6(RPL6) cDNA序列,构建其正反义真核表达载体,以探讨RPL6与白血病多药耐药的关系。方法:用RT—PCR技术扩增RPL6 cDNA序列,DNA重组技术构建其正反义真核表达载体。结果:成功扩增RPL6 cDNA序列,经DNA测序,证实与GenBank中的人RPL6编码区序列一致,酶切证实目的基因分别按正反两个方向亚克隆至真核表达载体。结论:成功克隆人RPL6 cDNA序列,并构建了正反义真核表达载体。  相似文献   

11.
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   

12.
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   

13.
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   

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.
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   

19.
Objective To measure Derpl and Blot5 allergen levels in asthmatics' homes in Hongkong.Methods Seventy houses were enrolled for a mite indoor environment study. Dust samples were obtained from two sites of each patients' house: bed and floor. Derpl and Blot5 levels were quantified by a two-site monoclonal antibody-based ELISA technique.Results The levels of Derpl allergens found in bed (geometric mean (GM) 3.43 μg/g of dust; 95%CI, 1.89-4.96 μg/g)and on the floor (GM 1.12 μg/g of dust; 95%CI, 0.71-1.53 μg/g) indicated significant differences (P=0.005). However, the levels of Blot5 allergens found in bed (GM 19.00 μg/g of dust; 95%CI, 0.89-38.90 μg/g) and on the floor (GM 6.14 μg/g of dust; 95%CI, 0.40-11.90 μg/g) showed no statistically significant difference. In addition, in regards to the exposure index for Derpl and Blot5 allergens found in bed and on the floor, 17.6% in bed and 8.6% on the floor had levels of Blot5 ≥ 10 μg/g of dust, higher than those obtained for Derp1 (7.2% and 0% in bed and on the floor respectively, P< 0.05); higher percentages in bed and on the floor (25.0% and 35.7%) were observed for levels of Blot5 =0 μg/g of dust as compared with Derpl in bed and on the floor (4.3% and 14.5% respectively, P< 0.05).Conclusions Derpl and Blot5 are the major allergens found in this regional study, Blot5 is a more potent allergen in Hongkong, probably reflecting the high level of exposure to Blomia tropicalis (Bt). Bt and Dermatophagoides pteronyssinus (Dp) allergens should be included for precise diagnosis and effective immuno-therapeutic treatment of mite allergy in Hongkong.  相似文献   

20.
ANTI-PROLIFERATION EFFECT OF ORIDONIN ON HL-60 CELLS AND ITS MECHANISM   总被引:4,自引:0,他引:4  
Objcetive To investigate the anti-proliferation effect of oridonin on leukemic HL-60 cells and its mechanism. Methods HL-60 cells in vitro in culture medium were given different concentrations of oridonin. The inhibitory rate of cells were measured by microculture tetrazolium (MTT) assay, cell apoptotic rate was detected by flow cytometry (FCM), morphology of cell apoptosis was observed by hoechst 33258 fluorescence staining, and the activity of telomerase was detected using telomere repeat amplification protocol (TRAP) PCR-ELISA before and after apoptosis occurred. Results Oridonin could decrease telomerase activity, inhibit growth of HL-60 cells, and cause apoptosis significantly. The suppression was both in time- and dose-dependent manner. Marked morphological changes of cell apoptosis including condensation of chromatin and nuclear fragmentation were observed clearly by hoechst 33258 fluorescence staining especially after cells were treated 48-60 hours by oridonin. Conclusions Oridonin has apparent anti-proliferation and apoptotic effects on HL-60 cells in vitro, decreasing telomerase activity of HL-60 cells may be one of its most important mechanisms. These results will provide strong laboratory evidence of oridonin for clinical treatment of acute leukemia.  相似文献   

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