抗重组人乳腺珠蛋白单克隆抗体的制备及其特异性鉴定

目的通过杂交瘤技术获得特异性抗hMAM单克隆抗体,为进一步研制基于hMAM的乳腺癌早期诊断试剂盒奠定基础。方法以纯化的重组蛋白为抗原免疫Balb/c小鼠,运用杂交瘤技术制备、间接ELISA法及免疫组化法筛选出能稳定分泌特异性抗hMAM的单克隆抗体细胞株。结果通过杂交瘤技术获得了2株能分泌特异性抗hMAM单克隆抗体的杂交瘤细胞株hMAM-A2及hMAM-B7,其分泌的单克隆抗体亚类均属于IgG1,Western blotting结果显示2株细胞分泌的单克隆抗体特异性强能与34kDa处的hMAM抗原形成单一的蛋白质显色条带,免疫组化结果显示其仅与乳腺癌组织呈阳性反应,与其他肿瘤组织不发生交叉反应。结论利用鼠-鼠杂交瘤技术成功的制备了2株稳定分泌高效价、高特异性抗hMAM的杂交瘤细胞株。     

抗AIB1-N单克隆抗体的制备及鉴定

目的获得有生物活性的抗乳腺癌扩增性抗原1氮端（amplified in brest cancer 1-Nterminal,AIB1-N）单克隆抗体。方法以谷胱甘肽转硫酶耦联的抗乳腺癌扩增性抗原1氮端蛋白（GST-AIB1-N）为免疫原,免疫BALB／c小鼠,采用杂交瘤技术制备抗AIBl一N单克隆抗体,用间接ELISA和Western-blot鉴定其亚类和抗原结合特异性。结果成功筛选出一株稳定分泌抗AIB2—N单克隆抗体的杂交瘤细胞株,其分泌抗体亚类为IgG1,经Western-blot鉴定该McAb特异性高,亲和力强。结论成功制备了抗AIB1-N单克隆抗体,为深入研究AIB1的表达及临床应用提供了有力的工具。     

特异性SARS-CoV N蛋白单克隆抗体的制备及抗原表位初步分析

目的：用分段表达纯化的SARS冠状病毒（SARS-CoV）的核衣壳蛋白（nucleocapsid N蛋白）制备针对该蛋白不同区域抗原表位的高特异性单克隆抗体（McAb）,初步定位单克隆抗体识别表位所在区域。方法：用分段表达纯化的SARS～CoV的N蛋白（分别记为N1蛋白、N2蛋白）分别免疫Balb／c小鼠制备McAb,通过检测其亚类、效价及相对亲和力鉴定McAb的生物学特性,以Western blot鉴定单克隆抗体特异性,并对McAb结合表位进行初步分析。结果：筛选出7株抗SARS-CoV N1蛋白及2株抗SARS-CovN2蛋白的单克隆抗体杂交瘤细胞株,IgG亚类鉴定6株为IgG1,2株为IgG2b,1株为IgG3,腹水效价10^5以上;亲和常数达10^8以上。Western blot证实所获的单克隆抗体可与SARS-CoVN蛋白发生特异性反应。ELISA相加实验结果显示2株N1 McAb识别相同的抗原表位,其余均识别不同的抗原表位。结论：通过分段表达纯化的SARS-CoVN蛋白而制备的特异性针对SARS-CoV N蛋白不同区域抗原表位的单克隆抗体中,N1单抗识别N蛋白N端（1-549bp）,N2单抗识别N蛋白C端（496～1269bp）,可初步定位单克隆抗体识别表位所在区域。     

恶性疟原虫乳酸脱氢酶单克隆抗体的制备及其特性鉴定

为制备抗恶性疟原虫乳酸脱氢酶（LDHp）单克隆抗体（McAb）,并对其特异性进行鉴定,用纯化的LDHp重组抗原免疫BALB/c小鼠,采用杂交瘤技术制备McAb,筛选出分泌高滴度McAb的杂交瘤细胞株,测定其免疫球蛋白亚类及其效价,ELISA、Westen blotting试验分析其特导性。结果,制备出2A5和 1H10两株能稳定分泌抗LDHp　McAb的杂交瘤细胞株,两株单抗均为IgG2b,2A5和1H10培养上清的ELISA效价分别为1:512和1:256,腹水效价分别为1:25600和1:12800,两株单抗与间日疟、红细胞、弓形虫、日本血吸虫等抗原均不发生交叉反应,能识别恶性疟原虫的33Kda虫源蛋白。证明制备的抗LDHp杂交瘤细胞株能分泌高滴度和高特异性的单抗。     

抗人TPO单克隆抗体的制备

目的：制备抗人血小板生成素（hTPO）单克隆抗体，用于建立ELISA方法和检测TPO的表达。方法：用基因重组的hTPO免疫Balb／c小鼠，常规法做细胞融合，用ELISA法筛选出阳性杂交瘤细胞株。结果：获得一杂交瘤细胞株（46-6），其免疫球蛋白亚类为IgG1经ELISA和免疫印迹技术证明，此单抗能特异识别TPO。结论：46－6单克隆抗体（McAb）特异性强。用其建立的夹心ELISA检测TPO的方法线性好，灵敏度可达50ng／L。     

抗恶性疟原虫EBA-175单克隆抗体的制备与初步鉴定

目的 制备抗恶性疟原虫EBA-175的单克隆抗体(McAb),为恶性疟原虫的诊断及疫苗研究奠定基础。方法 以恶性疟原虫EBA-175(II区F2段)重组抗原免疫BALB/c小鼠,采用杂交瘤技术制备McAb,间接ELISA筛选分泌高滴度McAb的杂交瘤细胞株,测定其免疫球蛋白亚类及其效价,ELISA、Westernblot试验分析其特异性。结果 筛选获得6株稳定分泌抗重组EBA-175McAb的杂交瘤细胞株1F3、2E8、2H5、4A1、4C3、4H9,6株McAb经鉴定其亚类5株为IgG1,1株为IgG2a,6株McAb的培养上清ELISA效价为1:256~1:512,腹水效价为1:12800~1:25600,间接ELISA显示其中4株McAb1F3、2H5、4A1、4H9能与恶性疟原虫抗原发生特异性结合,而只有1F3、4A1、4H9在Westernblot试验中识别恶性疟原虫M_r约35000的虫源蛋白。结论 获得了能稳定分泌高特异性抗EBA175McAb的杂交瘤细胞。     

抗赭曲霉毒素A单克隆抗体的制备及其ELISA检测方法的建立

目的制备抗赭曲霉毒素A（OA）的单克隆抗体（McAb）并对其进行初步鉴定,在此基础上建立竞争抑制酶联免疫吸附试验（ELISA）用于OA的检测。方法采用小剂量长周期的免疫方案,以OA 牛血清白蛋白（BSA）偶联物免疫雌性BALB/c小鼠,采用细胞融合法获得分泌抗OA的McAb的杂交瘤细胞株,用竞争抑制ELISA法进一步检测McAb的特异性,腹水诱生法大量制备McAb,以OA为竞争抗原,建立检测OA的竞争抑制ELISA。结果OA BSA免疫的BALB/c小鼠血清效价为1:512?000,与BSA有强烈的交叉反应。细胞融合后,ELISA筛选抗体分泌阳性的杂交瘤细胞株,抗OA BSA的McAb与BSA的交叉反应率仅为3.5%,对分泌抗OA BSA特异的McAb的细胞株经3轮克隆化,抗体分泌阳性率达到100%,建立了1株能稳定分泌抗OA BSA McAb的杂交瘤细胞株,竞争抑制法进一步证明了该抗体是特异针对OA的,腹水诱生法制备了大量的McAb。竞争抑制ELISA线性范围为0.24～125?ng/mL,线性方程y=-0.113?2logx+0.901?6,相关系数r=0.98,最低检出浓度为0.24?ng/mL。样品的加标回收率为97.07%～107.83%。结论获得了分泌抗OA的McAb的杂交瘤细胞株,建立了OA检测的简单、灵敏、高效的ELISA检测方法。     

人心肌肌钙蛋白T单克隆抗体杂交瘤细胞株的建立

目的：建立抗人心肌肌钙蛋白T(cTnT)单克隆抗体(McAb)的杂交瘤细胞株。方法：从人心肌组织中提取纯化人cTnT，免疫BALB／C小鼠，采用杂交瘤技术，间接ELISA法选择能稳定分泌抗cTnT　McAb的杂交瘤细胞株。结果：建立了2株稳定分泌抗cTnT　McAb的杂交瘤细胞株N15C和N16D，其染色体数目为90-106，McAb Ig亚类均为IgG，，间接ELISA法测定McAb腹水效价分别为1：8000和1：32000。免疫印迹结果显示2株McAb均可识别cTnT中Mr为37000的单一区带，不识别人骨骼肌提取物。间接ELISA法测定N15C和N16DMcAb与cT—nT反应的最低浓度分别为47μg/L和23μg／L。相加试验表明2株McAb能识别不同的抗原表位。结论：获得2株能稳定分泌特异性抗人心肌cTnT McAb的杂交瘤细胞株。     

抗PSMD10单克隆抗体的制备和鉴定

目的制备抗PSMD10的单克隆抗体(McAb),并对其特异性进行鉴定。方法用柱层析纯化的重组PSMD10蛋白免疫BALB/c小鼠,采用杂交瘤技术制备McAb,用ELISA和有限稀释法筛选出分泌高滴度McAb的杂交瘤细胞株,用Protein-G亲和层析纯化接种杂交瘤细胞的小鼠腹水,测定其免疫球蛋白亚类及其效价,Western-blot分析其特异性。通过免疫组织化学染色法检测PSMD10在肝细胞肝癌组织中的表达部位。结果筛选出2株能稳定分泌抗PSMD10单克隆抗体的杂交瘤细胞株,单抗均为IgG2,Western-blot分析显示,2株单抗都与重组的PSMD10发生特异性结合。免疫组织化学染色分析显示,PSMD10表达在肝细胞肝癌的细胞浆内。结论制备的抗PSMD10杂交瘤细胞株能分泌高滴度和高特异性的单克隆抗体,可望用于进一步研究肝细胞肝癌的发生发展、诊断和治疗。     

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.