应用SELDI—TOF—MS技术筛选T1DM患者血清蛋白标记物

目的：筛选1型糖尿病（T1DM）患者血清特异标记物,并探讨其与谷氨酸脱羧酶抗体（GAFYAh）滴度的相关性。方法：利用表面加强激光解吸电离-飞行时间质谱（SEI,DI—TOFMS）技术及其配套蛋白质芯片,对33例T1DM患者、39例正常人的血清蛋白质图谱进行检测,结合Biomarker Patterns Software（BPS）建立诊断模型。ELISA法检测T1DM组患者血清GAD-Ab滴度。结果：T1DM患者和正常人血清蛋白质谱在相对分子质量为2000～50000范围内,有39个蛋白质峰差异有统计学意义（P〈0．05）,经软件分析,建立由相对分子质量为3172．63和4884．89的标记蛋白峰组成T1DM的诊断模型,其诊断T1DM的特异度为92．308％（36／39）,灵敏度为84．848％（28／33）。TIDM患者的GAD-Ab滴度与相对分子质量为4884．89的标记蛋白强度呈正相关（r=0．428,P〈o．05）。结论：应用飞行时间质谱技术结合蛋白质芯片,可直接筛选出T1DM患者血清中相对特异的蛋白标记物,诊断TIDM的灵敏度、特异度高。相对分子质量为4884．89的标记蛋白是一个与GAD-Ab滴度密切相关的T1DM血清标志物。     

血清蛋白质指纹图谱诊断模型在肾癌中的应用

目的 检测肾癌患者血清蛋白质,筛选特异的蛋白质标记物,构建用于肾癌早期诊断的血清蛋白质指纹图谱模型.方法 应用蛋白质芯片CM10及表面增强激光解吸/离子化飞行时间质谱(SELDI-TOF-MS)技术测定168例血清标本(其中肾癌53例,肾良性占位性病变47例,健康志愿者68例)的蛋白质质谱,用随机抽取的118例标本(肾癌38例,肾良性占位病变30例,健康志愿者50例)作为训练组,应用支持向量机进行训练和交叉验证,建立肾癌诊断模型;其余50例标本进行盲法验证.结果 利用质荷比分别为5350、4100、3446、5027和6115的5个蛋白峰建立区分肾癌和正常人的诊断模型,其敏感性为94.74%,特异性为92%.盲法验证显示敏感性为93.33%,特异性为88.89%.区分肾癌和肾良性占位病变的诊断模型,敏感性为92.11%,特异性为90%.区分透明细胞癌和其他病理类型的肾癌的诊断模型对透明细胞癌的判别率为92.84%,对其他病理类型的肾癌的判别率为81.82%.结论 表面增强激光解吸电离/飞行时间质谱技术结合支持向量机建立肾癌血清蛋白质指纹图谱模型对诊断肾癌具有较高的敏感性与特异性.     

应用SELDI-TOF-MS对先天性巨结肠血清蛋白质标记物检测

目的 建立蛋白质芯片技术检测先天性巨结肠患儿血清蛋白质,筛选特异的蛋白质标记物,构建用于先天性巨结肠患儿早期筛选及普查的血清蛋白质指纹图谱模型.方法 应用蛋白质指纹图谱分析仪(表面增强激光解析-电离-飞行时间质谱仪,SELDI-TOF-MS),测定62例血清标本(先天性巨结肠患儿42例,健康儿童20例),并结合生物信息学方法支持向量机分析数据.结果 筛选出3个m/z位于3221.7、5639.2、6884.2的蛋白质标记物构建用于先天性巨结肠早期筛选及诊断的血清蛋白质指纹图谱模型.经留一法交叉验证,区分先天性巨结肠和正常小儿的血清蛋白质指纹图谱模型的特异性为100%,敏感性为100%.结论 应用SELDI-TOF-MS结合生物信息学方法支持向量机构建的血清蛋白质指纹图谱模型在早期筛选及普查先天性巨结肠患儿的诊断中较以往的传统方法具有较高的敏感性和特异性,值得进一步研究与应用.     

应用表面加强激光解析电离-飞行时间质谱技术建立非活动性HBsAg携带者血清蛋白质谱筛选模型

目的 比较非活动性HBsAg携带者和健康人的血清蛋白标记物并建立相关筛选模型.方法 用表面加强激光解析电离-飞行时间质谱技术(SELDI-TOF-MS)及CM10蛋白芯片对35例非活动性HBsAg携带者、35例健康人血清样本进行分析,将获得的血清蛋白质指纹图谱用计算机软件进行比较分析,建立非活动性HBsAg携带者的比较筛选模型.结果 非活动性HBsAg携带者组与健康人对照组共有28个差异有统计学意义的蛋白峰;建立诊断模型的灵敏度94%(33/35),特异度80%(28/35),准确率为87%(61/70).结论 建立的血清蛋白质指纹图谱模型能够区分非活动性HBsAg携带者与健康人,SELDI技术在诊断及特异性血液生物标志分子的筛选等方面具有较好的临床应用价值.     

表面增强激光解吸离子化飞行时间质谱技术筛选蕈样肉芽肿血清生物标志物

目的 应用表面增强激光解吸离子化飞行时间质谱技术(SELDI-TOF-MS)筛选蕈样肉芽肿患者血清中的生物标志物.方法 采用CM10蛋白质芯片捕获14例蕈样肉芽肿患者(研究组)和17例对照者(对照组)血清中的蛋白质,结合BiomarkerWizard软件进行分析.结果 所有标本在相对分子质量0～50000范围内均能检测出131个左右的蛋白峰.两组血清样本的蛋白质指纹图谱存在14个差异表达蛋白质峰,其中相对分子质量为7670的蛋白质峰与C-C基序趋化因子22相符.结论 SELDI-TOF-MS可用于蕈样肉芽肿患者血清生物标志物的筛选.     

2型糖尿病视网膜病变患者的血清低分子量蛋白质指纹图谱

目的研究2型糖尿病视网膜病变（diabetic retinopathy,DR）患者特异的血清低分子量蛋白质指纹图谱。方法应用表面加强激光解吸电离-飞行时间-质谱（SELDI-TOF-MS）技术,选用H4蛋白质芯片,优化技术参数,对16例正常人,27例2型糖尿病不伴DR患者及21例2型糖尿病伴DR患者的血清标本进行检测,应用Biomarker Wizard软件筛选DR患者血清中差异表达蛋白质。结果H4芯片在激光强度210,灵敏度为9的条件下可获得较理想的图谱。在m／z2000至20000范围内共出现31个蛋白质／多肽峰;其中有5个差异表达蛋白质或多肽,m／z为7440,7639,7839,8147和8925（P〈0．05）。结论SELDVTOF-MS蛋白质芯片技术是一种快速、简便和高通量分析方法,能直接筛选出DR患者血清中的潜在标记物。     

新疆维吾尔族食管癌患者血清蛋白指纹图谱诊断模型的建立

目的:筛选并建立新疆维吾尔族食管癌血清蛋白指纹图谱诊断模型,为食管癌的诊断与临床筛查提供新的途径。方法:采用弱阳离子交换蛋白质芯片(CM10蛋白芯片)及表面增强激光解析离子化飞行时间质谱(SELDI-TOF-MS)技术对23例新疆维吾尔族食管癌和33例新疆维吾尔族正常对照者血清指纹图谱进行检测,所得结果用ZUCI-蛋白芯片数据分析系统(ZUCI-Protein Chip Data Analyze System)软件包进行分析,通过支持向量机运算建立区分新疆维吾尔族食管癌蛋白指纹图谱诊断模型,并用留一法交叉验证作用评估模型,判别效果。结果:通过软件包运算,用2个质荷比峰(3269.4621、6056.8714m/z)建立了新疆维吾尔族食管癌蛋白指纹图谱诊断模型,准确度为92.9%,灵敏度为91.3%,特异度为93.9%,阳性预测值为91.3%。结论:SELDI-TOF-MS技术结合支持向量机建立新疆维吾尔族食管癌血清蛋白质指纹图谱模型为早期筛查及诊断新疆维吾尔族食管癌提供了一种特异性强、灵敏度高的新方法,值得进一步的研究和应用。     

应用SELDI-TOF-MS技术建立鼻咽癌诊断中的血清蛋白质指纹图谱模型

目的:检测鼻咽癌、耳鼻部良性疾病和正常人血清中蛋白质指纹图谱,筛选特异的蛋白质标志物,构建用于鼻咽癌诊断的分类树模型.方法:采用CM10芯片及SELDI-TOF-MS技术对30例鼻咽癌患者及24例对照组血清样本进行蛋白质指纹图谱检测分析,所得到的结果采用Biomarker Wizard和Biomarker Patterns System软件分析并建立用于鼻咽癌诊断的分类树模型,并用其余10例鼻咽癌患者和12例对照组标本进行双盲验证.同时用酶联免疫法(ELISA)检测两组的血清EB病毒VCA-IgA抗体,将诊断模型的判定结果通过与血清EB病毒VCA-IgA抗体检测结果相对比验证其对于临床的应用价值.结果:从两组血清中筛选出Mr为8559,15 115,15 836,15 937,16 089的5个差别有统计学意义(P<0.05)的标志蛋白,所建立的诊断模型对鼻咽癌诊断的准确率、灵敏度和特异度分别为98.1%(53/54),96.7%(29/30)和100%(24/24).双盲验证后的准确率、灵敏度和特异度分别86.4%(19/22),80.0%(8/10),和91.7%(11/12).灵敏度优于血清EB病毒VC...     

细粒棘球蚴病患者血清蛋白质差异表达分析

目的 筛选细粒棘球蚴病患者血清蛋白质组学标记物,探索其用于细粒棘球蚴病诊断的价值.方法 细粒棘球蚴病患者35例,非棘球蚴病其他肝病对照组17例,健康对照组20例,用弱阳离子交换芯片(CM10芯片)结合表面增强激光解析离子化飞行时间质谱(SELDI-TOF-MS)技术检测血清蛋白质谱,用ZUCI-蛋白芯片数据分析系统软件包进行分析.通过支持向量机运算筛选病例组和对照组血清差异表达蛋白峰,建立细粒棘球蚴病蛋白质指纹图诊断模型并用留一法验证其诊断价值.结果 细粒棘球蚴病患者和健康对照组之间共筛选出8个差异表达蛋白峰,质荷比分别为1044、1046、1055、1075、6452、6649、8714的几个蛋白峰在病例组中下调,质荷比为5651的蛋白峰在病例组中上调(P<0.05);细粒棘球蚴病组和其他肝病对照组之间筛选出1个差异蛋白峰(质荷比为5951,P<0.05);其他肝病组和健康组合并后的对照组和细粒棘球蚴病组之间共筛选出8个差异蛋白峰,留一法验证表明以此差异蛋白峰建立的诊断模型灵敏度为62.86%,特异度为67.57%.结论 SELDI-TOF-MS蛋白质芯片技术能筛选出细粒棘球蚴病患者血清中的差异表达蛋白质,有望能成为细粒棘球蚴病的诊断和研究方法.     

蛋白指纹图谱蛋白芯片技术检测诊断早期胃癌的临床意义

目的:应用SELDI蛋白质芯片检测胃癌患者血清蛋白质指纹图谱,筛选候选肿瘤标志物以建立诊断模型,并探讨其诊断早期胃癌的临床意义。方法:表面加强激光解吸电离-飞行时间质谱(SELDI-TOF-MS)技术及其配套蛋白质芯片检测80例胃癌患者(Ⅰ/Ⅱ期40例与Ⅲ/Ⅳ期40例)、80例良性胃病患者(胃溃疡40例与慢性萎缩性胃炎40例)和80例健康人的血清蛋白质质谱。将部分研究对象随机分为训练集(40例胃癌、20名良性胃病与20名健康人群)和验证集(40例胃癌、20名良性胃病与20名健康人群),前者用于筛选胃癌差异蛋白标志物并建立人工神经网络诊断模型,后者用于模型诊断效度的盲法验证。结果:质荷比(m/z)分别为2927、3217、3236、3287的4个蛋白质峰组合所构建的诊断模型能达到诊断胃癌患者的最佳诊断效果,灵敏度90.0%,特异度92.5%。结论:SELDI蛋白芯片技术在胃癌的诊断尤其是早期诊断、术前分期及候选肿瘤标志物筛选等方面具有一定价值,值得进一步研究。     

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.