人基质金属蛋白酶-1融合蛋白的纯化及其多克隆抗体的制备与初步应用

目的 :获得兔抗人基质金属蛋白酶 1 (MMP 1 )多克隆抗体 ,并将其初步应用于临床检测。方法 :将人MMP 1融合蛋白经亲和层析法纯化 ,并将其作为抗原免疫家兔 ,获得兔抗血清 ,经饱和硫酸铵纯化 ,获得初步纯化的兔抗人MMP 1多克隆抗体。用双抗夹心间接酶联免疫吸附实验 (ELISA)测定正常对照、慢性肝病、肝硬化患者血清MMP 1的OD值。结果 :获得初步纯化的兔抗人MMP 1特异性多克隆抗体 ,该抗体能与人MMP 1起反应。结论:制备的MMP 1多克隆抗体可初步用于临床检测     

抗泡球蚴重组Em18抗原多克隆抗体的纯化与鉴定

目的：制备抗泡球蚴18（Em18）抗原多克隆抗体,纯化并鉴定.方法：表达并纯化rEm18-GST蛋白.用纯化后的蛋白作为免疫原,免疫新西兰白兔获得抗rEm18-GST的多克隆抗体IgG,采用ELISA法检测抗体效价,进一步纯化抗体,获得抗Em18特异性多克隆抗体IgG,用Western blot及ELISA法检测并进行初步鉴定.结果：免疫制备获得兔抗rEm18-GST抗体,随着免疫次数的增加,抗体滴度不断升高,于第10周达到最高.ELISA检测抗体效价为1∶51 200.Western blot及ELISA法鉴定表明Em18-GST抗体去除了与GST的交叉反应.结论：获得了去除与GST交叉反应的抗Em18多克隆抗体,为进行噬菌体肽库筛选奠定基础.     

互补式亲和层析纯化制备兔源性抗人精子多克隆抗体标准品

目的:纯化制备兔源性抗人精子多克隆抗体标准品.方法:利用人精子抗原及其他组织蛋白等分别制备亲和层析柱,经正反相互补式亲和层析从兔抗血清中纯化IgG和IgA型抗人精子多克隆抗体,用SDS-PAGE、Western blot和ELISA等法检测其纯度、特异性和与精子抗原的线性反应.结果:所得抗体与牛血清白蛋白、正常人全血清、正常人组织细胞裂解液等在诊断试剂中常有的物质无可见交叉反应,在7.8120～0.488 2ng·ml-1或31.250～1.953ng·ml-1浓度范围内与精子抗原的酶联吸附试验呈直线反应.结论:该纯化方案可用于抗精子抗体定量检测中抗体标准品的制备.     

重组登革病毒2型NS1蛋白的分泌表达及其抗体制备

目的 分泌表达重组登革病毒2型NS1蛋白,并制备兔抗NS1多克隆抗体.方法 应用毕赤酵母表达系统表达全长登革病毒2型NS1蛋白,制备抗原,免疫家兔;采集免疫血清,制备兔抗NS1蛋白多克隆抗体;应用Western-blot、ELISA法鉴定和检测抗体效价;经辛酸-硫酸铵法、亲和层析法纯化抗体,SDS-PAGE电泳检测抗体的纯度;用Western-blot、ELISA法检测纯化后IsG性质及效价.结果 重组NS1蛋白获得分泌表达,其免疫血清经Western-blot、ELISA法证实获得特异性兔抗NS1多克隆抗体,抗体效价为1:6000.结论 重组登革病毒2型NS1蛋白在毕赤酵母真核表达系统中高效表达,纯化产物有较强的免疫原性,成功获得特异性兔抗NS1多克隆抗体,为进一步研究登革病毒NS1蛋白及其抗体在登革病毒致病与免疫机制中的作用奠定了基础.     

HZF1在大肠杆菌中的表达及多克隆抗体的制备

目的在大肠杆菌中表达HZF1融合蛋白,制备抗HZF1抗体。方法构建包含编码HZF1非锌指区DNA的重组表达质粒pET30a-HZF1,转化大肠杆菌并用异丙基-β-D-硫代半乳糖苷诱导表达相应的融合蛋白,采用镍柱纯化。以纯化蛋白作为免疫抗原,对新西兰大白兔实施多次免疫(间隔时间分别为3、2和2周)。用ELISA和Westernblot检测抗体效价和特异性。结果获得兔抗HZF1抗体,经过ELISA检测,效价在1:100000以上。Westernblot显示兔抗HZF1抗体能够特异性检测氯高铁血红素诱导的K562细胞中的HZF1蛋白。结论得到高特异性的兔抗HZF1抗体,为HZF1的功能研究以及组织和细胞中HZF1的检测奠定了一定基础。     

人基质金属蛋白酶—1融合蛋白的纯化及其多克隆抗体的制备与初步应用

目的：获得兔抗人基质金属蛋白酶-1(MMP-1)多克隆抗体，并将其初步应用于临床检测。方法：将人MMP-1融合蛋白经亲和层析法纯化，并将其作为抗原免疫家兔，获得兔抗血清，经饱和硫酸铵纯化，获得初步纯化的兔抗人MMP-1多克隆抗体。用双抗夹心间接酶联免疫吸附实验(ELISA)测定正常对照、慢性肝病、肝硬化患者血清MMP-1的OD值。结果：获得初步纯化的兔抗人MMP-1特异性多克隆抗体，该抗体能与人MMP-1起反应。结论：制备的MMP-1多克隆抗体可初步用于临床检测。     

MLCK定量检测的双抗体夹心ELISA方法建立

目的:建立定量检测人肌球蛋白轻链激酶(MLCK)的双抗夹心ELISA法.方法:用抗MLCK兔多克隆抗体包被酶标板,1％小牛血清白蛋白(1％BSA)作为封闭液,抗MLCK羊多克隆抗体和HRP-兔抗羊抗体分别为包被抗体和检测抗体,建立双抗体夹心ELISA法,并进行了实验条件的优化;同时对新建立方法的灵敏度、精密度进行了评价...     

恶性疟原虫融合抗原PfCP-2.9在不同品系小鼠中的免疫特性

目的:探讨恶性疟原虫融合抗原PfCP-2.9在不同品系小鼠(BALB/ca、C57BL/6J、C3H/He、DBA/2J及昆明种)中的免疫原性和免疫反应特性.方法:以ISA720为佐剂,PfCP-2.9抗原皮下免疫5种品系小鼠3次,间隔3周.以ELISA检测免疫血清中特异性抗体的动态变化、IgG抗体亚型及对融合抗原各组分的抗体水平,以间接荧光抗体实验分析免疫血清对恶性疟原虫天然抗原的识别情况.结果:5种品系小鼠均能产生针对PfCP-2.9的免疫应答,3次免疫后血清中特异性抗体滴度达105以上.PfCP-2.9所诱生的免疫血清不但能识别MSP1-19和AMA-1(Ⅲ)两个主要片段,而且能识别恶性疟原虫天然抗原.所诱导的4种IgG抗体亚型中,IgG1和IgG2a是免疫血清中主要的抗体类型.但特异性抗体水平及抗体亚型分布因遗传背景不同而异.结论:融合蛋白PfCP-2.9在5种不同品系小鼠中具有强的免疫原性,其抗体能识别疟原虫天然蛋白.     

噬菌体表面展示技术筛选抗血小板GPⅡb/Ⅲa复合物单链抗体

目的 用噬菌体表面展示技术，直接从抗血小板表面蛋白全套单链抗体噬菌体展示文库中筛选能与糖蛋白(GP)Ⅱb/Ⅲa复合物高亲合力结合的单链抗体克隆，为开发有自主知识产权的抗栓药物奠定基础。方法 从活化血小板免疫的小鼠脾淋巴细胞中提取总RNA，反转录成cDNA后，用抗体可变区混合引物扩增全套轻、重链可变区基因，经重叠延伸反应，装配成单链抗体(ScFv)基因，将其克隆到噬菌体载体pHENl中，构建单链抗体噬菌体抗体库。对抗体库进行亲合筛选后，ELISA法鉴定抗GPⅡb/Ⅲa复合物单链抗体。结果 经过4轮“吸附——竞争性洗脱——扩增”的富集过程，Phage—ELISA得到一个ELISA活性较高的能与GPⅡb/Ⅲa结合的克隆。序列测定符合抗体可变区结构特点。结论 成功构建了全套抗血小板表面蛋白单链抗体噬菌体展示文库，并筛选得到具有GPⅡb/Ⅲa结合能力的单链抗体基因。     

小鼠血管内皮生长因子受体2胞外片段重组蛋白的制备及其初步应用

目的 :用基因工程方法获得小鼠VEGFR - 2 (Flk - 1)胞外段与配体结合区域的重组蛋白 ,并对其应用进行初步的探讨。方法 :将经PT -PCR扩增的目的序列组建到原核表达载体并诱导目的蛋白的表达 ,经纯化后的重组蛋白制备成疫苗 ,免疫兔 ,获得抗血清 ,用ELISA和Westernblot方法对抗血清进行分析。结果 :目的蛋白在原核表达系统中得到了高效的表达 ,该疫苗能刺激兔产生抗重组蛋白和天然Flk - 1的抗体。结论 :该抗血清可用于Flk - 1的免疫学检测 ,也为该疫苗用于抗肿瘤血管生成治疗奠定了基础。     

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.