核基质MINT N端片段(365～1084aa)相互作用蛋白的筛选及鉴定

目的:确定核蛋白MINT(Msx2-interacting nuclear target Protein)的功能及作用机制. 方法:利用酵母双杂交的方法,以MINT N端第365～1084位氨基酸(MINT-F2)为诱饵用酵母双杂交法筛选小鼠胚胎9日的cDNA文库. 用诱饵质粒和文库先后转化酵母宿主后,对1.0×108个酵母克隆进行营养筛选和β-半乳糖苷酶筛选,获得128个阳性克隆. 并提取质粒进行酶切鉴定,将获得的4个非重复克隆并进行序列分析. 结果:筛选出4个与MINT-F2相互作用的蛋白,它们分别是:67 ku层黏连蛋白受体,,2个16 S核糖体RNA,精氨酰-tRNA合成酶. 结论:成功筛选出与MINT-F2相互作用的蛋白,为进一步研究MINT的功能及作用机制打下基础.     

分化抑制因子1相互作用蛋白AGGF1的筛选

目的 利用酵母双杂交方法,筛选成人肺组织文库中与分化抑制因子1(Id1)相互作用的蛋白.方法 PCR方法扩增Id1的编码序列并定向克隆入诱饵质粒pHybLex/Zeo,构建重组诱饵质粒pHybLex/Zeo-Id1,酶切鉴定后转化人酵母株EGY48/pSH18-34,检测重组诱饵质粒有无非特异激活报告基因Leu2、LacZ作用;扩增并提取成人肺组织文库质粒,将文库质粒及重组诱饵质粒转化入酵母细胞,依次筛选Leu2 ,Leu2 LacZ 克隆;设置阴性及阳性对照,重复筛选Leu2 LacZ 克隆并排除假阳性克隆,获取真阳性文库质粒,进行测序和同源性比对.结果 酶切证实,重组诱饵质粒构建成功.重组诱饵质粒转化入酵母细胞后.经检测无非特异激活报告基因作用.扩增并筛选成人肺组织文库.获得198个Leu2 及19个Leu2 LacZ 克隆.经排除假阳性克隆,最终获得1个Leu2 LacZ 真阳性克隆,经测序和同源性比较证实该克隆与蛋白AGGF1高度同源(556/559,99.5%),Westem blotting证实其在酵母细胞中有表达.结论 利用酵母双杂交方法,通过筛选成人肺组织文库,发现Id1与AGGF1存在相互作用.     

酵母双杂交筛选雄激素受体辅助调节因子267-α(ARA267-α)的相互作用蛋白

目的:通过酵母双杂交系统筛选与雄激素受体辅助调节因子267-α(androgen receptor-associated coregulator 267-α,ARA267-α)有相互作用的蛋白质,为研究ARA267-α的生理功能寻找证据和方向.方法:以能表达ARA267-α中4个PHD(p1ant homeodomain)和1个SET[Su(var)3-9,Enhancer-of-zeste,Trithorax]结构域的pGBKT7-PHD-SET重组质粒为"诱饵",采用酵母融合(yeast mating)方法筛选预转化的人脑cDNA文库.挑选阳性酵母菌落进行质粒提取、限制性内切酶分析和DNA测序.将测序结果在GenBank中进行核苷酸序列同源性比对,确定它们所对应的基因.通过再次酵母双杂交排除假阳性相互作用.结果:筛选cDNA文库共获得约600个阳性酵母菌落,随机挑选其中的65个菌落提取混合质粒.经过在氨苄青霉素培养盘中筛选,共得到43个文库pACT2-cDNA质粒.选取35个酶切片段不同的文库pACT2-cDNA质粒进行测序,测序结果比对揭示,35个cDNA插入片段来源于16种不同的基因.酵母双杂交证实其中RanBPM是ARA267-d的假阳性作用蛋白.结论:通过筛选cDNA文库发现ARA267-α可以与多个不同的蛋白质相互作用,这提示ARA267-α可能是一个具有多种生理功能的蛋白分子,而RanBPM极可能是一个转录因子.     

MINT蛋白(1-365氨基酸)相互作用分子的筛选

目的 :用酵母双杂交技术筛选与MINT(Msx2 in teractingnucleartargetprotein) F1片段相互作用的分子 ,对MINT转录抑制的机制进行探讨 .方法 :以Mint F1片段 (1～ 36 5氨基酸残基 )连入载体pGBKT7构建的质粒为诱饵 ,利用酵母双杂交技术对人淋巴结cDNA文库进行筛选 ,并分析所获得的阳性克隆 .结果 :从 6× 1 0 7个克隆中共获得 1 2个不重复的阳性克隆 .经序列分析 ,得到 3个有意义的基因 ,分别为人小核RNA 蛋白复合体多肽G(SNRPG)、癌基因Vav和人微球蛋白 1 (MCRS1 ) .结论 :从筛选到的这 3个分子的定位与功能来看 ,MINT分子的N端片段可以与小核RNA 蛋白复合体 (snRNPs) ,Vav,MCRS1和RBP Jκ等相互作用 ,参与细胞内的信号传递 ,调控细胞周期 ,并可能影响RNA的加工与处理     

PER1与RACK1蛋白作用位点分析

目的 筛选人下丘脑视交叉上核(SCN)区域内与PERIOD1(PER1)相互作用的新蛋白,研究RACK1与PER1的作用特点,明确其结合的关键结构域.方法 采用酵母双杂交方法,筛选得到人SCN区域内与PER1-PAS结构域相互作用的新蛋白,并构建5种表达不同长度RACK1片段的酵母文库质粒与PER1诱饵质粒共转染酵母AH109进行杂交,通过营养缺陷筛选、报告基因检测获得阳性克隆,并采用体外转录、免疫共沉淀实验证实阳性克隆蛋白间的相互作用.结果 酵母双杂交筛选得到人SCN区域内表达RACK1蛋白的克隆,重组RACK1表达质粒与PER-PAS诱饵质粒进行酵母双杂交筛选后得到三个阳性克隆:RACK1(WD1-7)、RACK1(WD4-7)和RACK1 (WD5-7),β-半乳糖苷酶测试阳性证实报告基因表达,免疫共沉淀结果显示阳性克隆与PER1蛋白间存在相互作用.结论 RACK1与PER1存在直接相互作用,RACK1含有7个WD40结构域,本研究发现与PER1结合的最小区域位于Ⅴ、Ⅵ、Ⅶ三个WD40结构域,提示其碳端序列为其结合的关键部位.     

酵母双杂交技术筛选与HCMV-UL146编码产物相互作用蛋白

目的 应用酵母双杂交技术,在人胎脑文库中筛选与人类巨细胞病毒(human cytomegalovirus,HCMV) UL146基因编码蛋白相互作用蛋白,以探讨HCMV-UL146的生物功能.方法 应用酵母双杂交系统,构建pGBKT7-UL146诱饵质粒,转化酵母AH109,与含人胎脑cDNA文库质粒的酵母相互作用,于涂有X-α-gal营养缺陷型培养基上筛选生长.挑选蓝色克隆,提取此酵母克隆的质粒转化大肠杆菌,提取质粒DNA进行测序分析.结果 pGBKT7-UL146构建成功.经严格筛选,共有200余个阳性克隆,分离测序80个克隆,成功筛选出30个与HCMV-UL146特异性相互作用的蛋白.结论 HCMV-UL146与多种蛋白有相互作用,提示其生物学功能复杂.此结果为进一步研究HCMV-UL146基因功能提供依据.     

酵母双杂交中Id1与Fyn的相互作用

目的　筛选成人肺组织文库中与分化抑制因子Id1相互作用的蛋白。方法　构建重组诱饵质粒pHybLex/Zeo -Id1,转化入酵母细胞EGY4 8/pSH18- 34,检测重组质粒有无非特异激活报告基因作用 ;通过筛选成人肺组织文库 ,获取真阳性文库质粒 ,进行测序和同源性比较 ,获得真阳性克隆。结果　经测序证实 ,重组诱饵质粒pHybLex/Zeo-Id1构建成功 ;将重组诱饵质粒转化入酵母细胞EGY4 8/pSH18- 34中 ,经检测无非特异激活报告基因功能。通过对文库进行筛选 ,获得一个真阳性克隆 ,通过测序和同源性比较证实该阳性克隆与酪氨酸蛋白激酶Fyn高度同源 (36 0 / 36 0 )。结论　作者首次发现Id1与Fyn在酵母细胞中存在相互作用。     

应用酵母双杂交筛选与FAM172A相互作用蛋白的研究

目的 应用酵母双杂交技术（蛋白与蛋白的相互作用）,筛选人胎脑cDNA文库中与FAM172A蛋白相互作用的蛋白,为深入研究新发现的蛋白质FAM172A生物学功能及在疾病中的作用奠定基础.方法 构建pGB-FAM172A诱饵质粒,转化酵母菌株Y190.人胎脑cDNA转化诱饵酵母菌,于营养缺陷型培养基（SD/-Leu/-Trp/-His）上生长,从中筛选到35个单克隆进行β-半乳糖苷酶克隆转移滤纸实验,对蓝色克隆者进行质粒抽提,转入大肠杆菌DH/OB,进行抗性筛选,从中提取质粒,一对一与诱饵质粒pGB-FAM172A共转酵母细胞Y190,进行验证鉴定,提取质粒DNA进行测序并进行BLAST比对分析.结果 成功构建pGB-FAM172A质粒,经严格筛选,共有10个阳性克隆,分别进行测序、序列比对,成功筛选出6个与FAM172A存在相互作用的蛋白：RTCD1、MOCS2、A2M、KCNIP1、BTBD2和TOX2.结论 利用酵母双杂交系统筛选出6个可能与FAM172A相互作用的蛋白,为进一步研究FAM172A蛋白的生物学功能提供了线索.     

酵母双杂交筛选TEB4相互作用蛋白

目的 酵母双杂交筛选与TEB4(MARCH-VI)有相互作用的蛋白,构建该蛋白基因序列的重组栽体.方法 以人TEB4为诱饵质粒,利用酵母双杂交技术筛选人淋巴瘤cDNA文库.在SD/-4培养基上共获得150多个阳性克隆,将酵母菌扩增后抽提质粒,转化大肠杆菌,进行序列分析,并经过回复杂交验证,发现了一个与TEB4相互作用的蛋白:ATP synthase F0 subunit 6(ATP-C6).PCR法扩增ATP-C6,亚克隆到质粒pCMV-HA中,获得重组质粒pCMV-HA-ATP-C6,酶切和测序进行鉴定.结果 从人淋巴瘤cDNA文库筛选到一个与TEB4有相互作用的蛋白ATP-C6,并成功构建重组质粒pCMV-HA-ATP-C6. 结论应用酵母双杂交系统从人淋巴瘤cDNA文库中筛选并初步验证了与TEB4有相互作用的蛋白,为TEB4蛋白功能的进一步研究奠定了基础.     

酵母双杂交筛选与分化抑制因子Id1′相互作用的蛋白

目的 筛选成人肺组织文库中与分化抑制因子Id1′相互作用的蛋白。方法 构建重组诱饵质粒pHybLex／Zeo-Id1′，转化入酵母细胞EGY48／pSH18．34，检测重组质粒有无非特异激活报告基因；通过筛选成人肺组织文库，获取真阳性文库质粒，进行测序和同源性比较，获得真阳性克隆。结果 经测序证实，重组诱饵质粒pHybLex/Zeo-Id1′构建成功；将重组质粒转化入酵母细胞：EGY48／pSH18-34，经检测无非特异激活功能。进一步通过对文库进行筛选，获得一个真阳性克隆，通过测序和同源性比较证实该阳性克隆是酪氨酸蛋白激酶Fyn。结论 分化抑制因子Id1′与Fyn在酵母细胞中存在相互作用。     

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.     

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.     

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.     

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.     

Scientific principles and rigorous processes should be followed in developing clinical guidelines for therapeutic interventions of integrative medicine

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.