首页> 中文期刊> 《湖南中医药大学学报》 >大肠癌唾液蛋白指纹图谱分子诊断模型研究

大肠癌唾液蛋白指纹图谱分子诊断模型研究

         

摘要

目的:研究建立大肠癌(colorectal cancer,CRC))唾液蛋白质指纹图谱新型分子诊断模型。方法采集34例肠癌患者、45例健康志愿者(正常组)的唾液标本,用弱阳离子交换型(WCX)纳米磁珠联合基质辅助激光解析电离飞行时间质谱(matrix assisted laser desorption ionization time-of-flight mass spectrometry, MALDI-TOF MS)技术进行检测,获得各标本的蛋白指纹图谱。用Biomarker Wizard软件分析所获得的蛋白指纹图谱找出差异蛋白,再用Biomarker Patterns 5.0.2建立鉴别诊断模型。结果共检测到312个肠癌差异蛋白质峰,两组比值大于3(肠癌/正常对照>3,或者正常对照/肠癌>3),其中有37个差异蛋白质峰有统计学意义(P<0.05);其中有7个差异蛋白质峰肠癌组表达上调,28个差异蛋白质峰肠癌组表达下调,有35个差异蛋白质峰有显著差异(P<0.01)。筛选建立了由m/z为2501.26、4779.95、3140.39的3个差异蛋白峰组成的肠癌与正常组的诊断模型,该模型的灵敏度和特异度分别为88%(30/34)和98%(44/45);通过交叉验证法进一步验证诊断模型的可靠性,结果该模型的灵敏度和特异度分别为85%(29/34)和88%(37/45)。结论用WCX结合MALDI-TOF-MS技术建立的唾液蛋白诊断模型为肠癌的诊断提供了新途径。%〔Abstract〕 Objective To establish a novel molecular diagnostic model of saliva protein fingerprint in colorectal cancer (CRC) patients. Methods Saliva samples from 34 patients with CRC, and 45 healthy people were analyzed by weak cationic-exchange magnetic beads (MB-WCX) and matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF-MS) methods. Subsequently, we compared the saliva peptide signatures of the two groups and obtained differently expressed peptides by using of Biomarker Wizard, then establish a diagnostic model to diagnose gastric carcinoma by using of Biomarker Patterns 5.0.2. Results 312 differentially expressed protein peaks were detected, the ratio of two groups>3.0 (CRC/control>3.0, or control/ CRC>3.0), including 37 protein peaks were statistically significant (P<0.05); 7 peaks were up-regulated, 28 peaks were down-regulated, there were 35 different protein peaks have significant difference (P<0.01). Further more, we screened and built a saliva proteomic models with 3 protein molecules m/z 2501.26, 4779.95, 3140.39to distinguish CRC groups and normal groups. The sensitivity of this model was 88% (30/34), and the specificity was 98 %(44/45). The reliability of this model was further verified with a sensitivity of 85% (29/34) and a specificity of 88% (37/45) by cross validation method. Conclusion Saliva proteomic profiling by using MALDI-TOF-MS combined with WCX technique is a novel potential tool for the clinical diagnosis of CRC.

著录项

  • 来源
    《湖南中医药大学学报》 |2016年第4期|19-24|共6页
  • 作者单位

    湖南中医药大学中医诊断国家重点学科;

    湖南省2011数字中医药协同创新中心;

    湖南 长沙 410007;

    广东医学院附属福田医院;

    广东 深圳 518033;

    湖南中医药大学中医诊断国家重点学科;

    湖南省2011数字中医药协同创新中心;

    湖南 长沙 410007;

    湖南中医药大学中医诊断国家重点学科;

    湖南省2011数字中医药协同创新中心;

    湖南 长沙 410007;

    广东医学院附属福田医院;

    广东 深圳 518033;

    深圳大学第一附属医院;

    广东深圳518035;

    深圳市老年医学研究所;

    广东 深圳 518020;

    湖南中医药大学中医诊断国家重点学科;

    湖南省2011数字中医药协同创新中心;

    湖南 长沙 410007;

    抗肿瘤中药创制技术湖南省工程研究中心;

    湖南 长沙 410007;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 肠肿瘤;中医诊断学;
  • 关键词

    大肠癌; 唾液; 蛋白质组; 分子诊断模型; 蛋白指纹图谱; 基质辅助激光解析电离飞行时间质谱;

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