反义IL-5载体构建及其对IL-5 mRNA和蛋白表达的影响

为构建含反义IL-5的重组腺相关病毒（rAAV）-asIL-5，观察rAAV-asIL-5对哮喘大鼠CD4^＋T淋巴细胞IL-5 mRNA和蛋白表达的影响。用基因重组方法构建反义IL-5 rAAV真核表达载体质粒pasIL-5／rAAV，磷酸钙沉淀法将真核表达载体质粒pasIL-5／rAAV、包装质粒pXX2、辅助质粒pXX6共转染入病毒包装细胞293细胞中，     

期刊文摘

反义IL-5载体构建及其对IL-5 mRNA和蛋白表达的影响[高宝安,熊维宁,徐永健等·中华内科杂志,2006,45(4):298~301]为构建含反义IL-5的重组腺相关病毒(rAAV)-asIL-5,观察rAAV-asIL-5对哮喘大鼠CD4 T淋巴细胞IL-5 mRNA和蛋白表达的影响。用基因重组方法构建反义IL-5 rAAV真核表达载体质粒pasIL-5/rAAV,磷酸钙沉淀法将真核表达载体质粒pasIL-5/rAAV、包装质粒pXX2、辅助质粒pXX6共转染入病毒包装细胞293细胞中,合成rAAV-asIL-5,Southern blot测重组病毒的滴度;将rAAV-asIL-5转染经密度梯度法和免疫磁珠法分离的哮喘大鼠…     

人CD40分子基因转染人脐静脉内皮细胞ECV-304

目的 构建人CD40的真核表达载体，建立持续、稳定高表达CD40的人脐静脉内皮细胞ECV-304。方法 将含有CD40的克隆载体pUCD40酶切后，再克隆到真核表达载体pCDNA3．1中，构建重组质粒pCDNA3．1（＋）／CD40，并对重组质粒进行酶切鉴定。然后用脂质体法将重组质粒转染ECV-304，G418筛选转染的细胞。RT-PCR、Western-blotting和流式细胞仪定性定量检测转染后的ECV-304的CD40的表达情况。结果 经酶切鉴定，重组体中已插入目的基因片段CD40。RT-PCR和Western-blotting证实，重组质粒转染的ECV-304中有CD40基因的表达，流式细胞仪检测转染后的ECV-304的CD40的表达率为95％。结论 成功构建了真核表达载体pCDNA3．1（＋）／CD40．并建立了高表达CD40的ECV-304，为筛选抗动脉粥样硬化药物奠定了基础.     

小鼠IL-33基因cDNA克隆与真核质粒的构建与表达

目的克隆小鼠IL-33基因（mIL-33）cDNA构建其真核表达质粒,并转染EL-4细胞检测其表达。方法提取小鼠脑与肺组织总RNA,经逆转录-聚合酶链反应（RT-PCR）扩增小鼠IL-33基因cDNA,酶切后插入pcDNA-3.1构建其真核表达载体pcDNA-mIL-33,重组质粒转染EL-4细胞,RT-PCR与ELISA法检测目的基因表达。结果 pcDNA-mIL-33中插入的DNA序列测定结果与mIL-33 cDNA序列一致,重组质粒转染EL-4细胞后检测到相应基因表达。结论成功克隆小鼠IL-33基因cDNA,并构建其真核表达质粒。     

小鼠IL-5真核表达质粒的构建和体外表达

目的 构建小鼠白细胞介素-5（IL-5）基因真核表达质粒,了解该质粒在真核细胞COS细胞中有效表达情况.方法 以含有小鼠IL-5基因的克隆质粒pORF9-mIL-5为模板,通过PCR扩增小鼠IL-5全段基因,应用基因工程技术将扩增的基因片段插入peDNA3.1（＋）真核表达质粒,构建重组真核表达质粒pcDNA-m IL-5,经限制性内切酶酶切分析及测序鉴定正确后,用脂质体转染技术转染COS细胞,用Western Blot鉴定该质粒是否能够在真核细胞中表达相应的目的蛋白质.结果 成功扩增了小鼠IL-5全长基因,酶切和测序证明正确构建了重组真核表达质粒pcDNA-m IL-5,Westem blot方法证实该质粒能在COS真核细胞中有效表达小鼠IL-5目的蛋白.结论 成功构建了小鼠IL-5基因的真核表达质粒载体,为进一步研究IL-5的新功能和免疫基因治疗奠定了基础.     

髓系细胞触发受体-1真核表达质粒的构建及鉴定

目的:构建髓系细胞触发受体-1(TREM-1)的真核表达质粒.方法:利用RT-PCR从人外周血总RNA中扩增TREM-1 基因的全长cDNA,插入克隆载体pUCm-T,BamH I和Pst I,酶切后将目的片段插入真核表达载体pEGFP-C3,构建含有TREM-1的重组质粒pEGFP-TREM-1,转染293细胞,用荧光显微镜观察、Western-blot鉴定蛋白表达.将pEGFP-TREM-1重组质粒转染THP-1细胞,100 ng/ml LPS刺激24 h后,半定量RT-PCR检测TNF-α和IL-1β基因的 mRNA水平.结果:经酶切和基因测序证实,克隆的基因片段为TREM-1基因;经转染的293细胞在荧光显微镜下可见荧光,并能表达TREM-1蛋白;重组TREM-1蛋白具有生物学活性,能增强TNF-α和IL-1β基因的mRNA水平.结论:成功构建了能够表达TREM-1的真核表达质粒pEGFP-C3-TREM-1,为进一步研究该基因的功能奠定了实验基础.     

重组人可溶性白细胞介素4受体蛋白抑制大鼠哮喘

目的探讨重组可溶性白细胞介素-4受体（IL-4R）对大鼠哮喘模型的影响。方法根据Gen Bank公布的Homo sapiens（human）IL-4R基因序列（XM₀05255309）,合成srh IL-4R基因片段,将合成基因片段插入p ET-28a（+）构建重组表达载体p ET-28a（+）-srh IL-4R,酶切鉴定后,将载体转入表达菌株BL21（DE3）进行诱导表达重组蛋白srh IL-4R,并用SDS-PAGE和Western-blotting方法分析重组蛋白。提取重组蛋白干预哮喘模型大鼠,取肺组织进行病理切片观察。结果重组载体p ET-28a（+）-srh IL-4R酶切获得长度为500bp⁷50bp的目的片段,表达载体p ET-28a（+）-srh IL-4R转入表达菌BL21（DE3）后经IPTG诱导表达出的重组蛋白经SDS-PAGE和Westernblotting方法可见重组蛋白分子量约为25k Da;重组人可溶性IL-4R蛋白干预哮喘大鼠可见肺组织炎细胞数量较模型组明显减少。结论 srh IL-4R防治哮喘具有一定作用。     

HBV全基因真核表达载体的构建及表达

目的：为诱导HBV特异性CTL，构建HBV全基因真核表达载体，并对其在细胞中的表达进行了初步研究。方法：以EcoRⅠ酶切pBR322-2HBV和pcDNA3，回收完整的HBV基因片段及线性化的载体pcDNA3，T4 DNA连接酶连接HBV和pcDNA3，转化、筛选，酶切鉴定HBV的插入方向。以脂质体将构建的pcDNA3-HBV转染HepG2肝癌细胞，经G418筛选，ELISA检测细胞培养上清中HBsAg、HBeAg的表达，RT-PCR检测转染细胞中PreSl mRNA的表达。结果：经酶切鉴定获得正向插入的pcDNA3-HBV，转染HepG2后，建立了新的肝癌细胞系HepG2．02G，细胞培养上清中可检测到高水平的HBsAg，PreSl mRNA在转染细胞中表达。结论：经体外重组，获得携带全长HBV基因片段的pcDNA3-HBV表达载体，并可在肝癌细胞中稳定表达。     

空肠弯曲菌Pen:19 cadF基因真核表达重组质粒的构建与表达

目的：构建空肠弯曲菌Pen：19cadF基因真核表达重组质粒，并证实其能在COS-7细胞中表达。方法：以含有KpnI和EcoRI酶切位点的同一对引物行PCR反应，获得空肠弯曲菌Pen：2、Pen：8、Pen：19和Pen：21cadF基因DNA片段。并选择与格林-巴利综合征最为相关的空肠弯曲菌Pen：19PCR产物为目的基因片段，插入到真核表达载体pcDNA3．1（＋）中，以构建重组质粒pcDNA3．1（＋）-cadF。重组质粒经双酶切、PCR反应鉴定和DNA双向测序确认后转染至COS-7细胞。运用RT-PCR方法检测重组质粒在细胞mRNA水平的表达。结果：双酶切反应、PCR反应和DNA双向测序证实cadF基因插入成功。采用RT-PCR方法能够从重组质粒转染的COS-7细胞中扩增出与目的基因大小一致的DNA片段。结论：空肠弯曲菌Pen：19cadF基因真核表达重组质粒pcDNA3．1（＋）-cadF构建成功，并能在COS-7细胞中表达。为空肠弯曲菌DNA疫苗的研究奠定了良好的基础。     

人CD40分子基因转染人脐静脉内皮细胞ECV-304

目的构建人CD40的真核表达载体,建立持续﹑稳定高表达CD40的人脐静脉内皮细胞ECV-304。方法将含有CD40的克隆载体pUCD40酶切后,再克隆到真核表达载体pCDNA3.1中,构建重组质粒pCDNA3.1( )/CD40,并对重组质粒进行酶切鉴定。然后用脂质体法将重组质粒转染ECV-304,G418筛选转染的细胞。RT-PCR﹑Western-blotting和流式细胞仪定性定量检测转染后的ECV-304的CD40的表达情况。结果经酶切鉴定,重组体中已插入目的基因片段CD40。RT-PCR和Western-blotting证实,重组质粒转染的ECV-304中有CD40基因的表达,流式细胞仪检测转染后的ECV-304的CD40的表达率为95%。结论成功构建了真核表达载体pCDNA3.1( )/CD40,并建立了高表达CD40的ECV-304,为筛选抗动脉粥样硬化药物奠定了基础。     

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.     

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.     

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.     

The comparative studies of the influences of Urapidil and Nicardipine on sino-atrial node function, atrio-ventricular node function and hemodynamics

Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P＜0.01);the MAP decreased(P＜0.01)and the HR increased drastically(P＜0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.     

Expression of OPGmRNA and ODFmRNA in the patients of hip fracture due to osteoporosis

Objective：To investigate the gene expression of osteoprotegerin（OPG） and osteoclast differentiation factor（ODF） in the bone tissue of patients with hip fracture due to osteoporosis. Methods：OPGmRNA and ODFmRNA in the bone tissue in 50 cases of osteoporosis sufferers（over 50 years old） with hip fracture（Observer Group） and 30 cases of hip facture sufferers with no osteoporosis（Control group） were analyzed with the Semi-Quantitative RT-PCR method. Results：The mRNA expressed of ODF, OPG were both high in the patients with hip fracture. In the control group, the expression of OPG mRNA was observed, while the expression of ODF mRNA was very slight. Conclusion：Aged patients contained all signals including OPG, ODF that are essential for inducing osteoclastogenesis and promoting bone resorption.     

The clinicopathological and immuohistochemical analysis of solid-pseudopapillary tumor of the pancreas： report of 9 cases

Objective：To investigate the clinical features, pathological characteristics and immunophenotype of solid-pseudopapillary tumor of the pancreas（SPTP）. Methods：Nine surgically treated cases of SPTP were retrospectively reviewed. Hematoxylin and Eosin（HE） staining and immunohistochemical staining were used to analyze all cases, and the general clinical data was collected. Results：Six patients were asymptomatic except for a palpable mass. Two patients complained of vague-epigastric pain. One patient appeared jaundice. The tumor was encapsulated and solid tissues alternately with cystic tissues. Histologically, the histological structure of solid portion was pseudopapillary with a fibrovascular core. Tumor cells were uniform and medium-sized which were arranged in sheets ets or nests or pseudopapillary patterns. Immunohistochemical studies demonstrated that SPTP proved positive in vimentin（9/9 cases）, AAT（9/9 cases）, NSE（9/9 cases）, ACT（7/9 cases）, CK20（2/9 cases）, CgA（1/9 cases）, S-100（3/gcases）, PR（4/gcases）, Syn（3/9 cases） and CD56（5/9cases）, negative in CEA and ER. Conclusion：SPTP is a tumor predominantly occurring in young women frequently without special symptoms. This tumor has various characteristical histological patterns with different immunophenotype.     

Dynamic Changes in Serum Estradiol and Progesterone levels in Patients of Premenstrual Syndrome with Adverse Flow of Liver-qi

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.     

Real-time Three-dimensional Echocardiography in Assessment of Left Ventricular and Right Ventricular Volumes

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.     

SCREENING FOR A 21-CHROMOSOME ABNORMALITY IN PREIMPLANTED EMBRYOS OF ELDERLY WOMEN

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.