CA125阴性卵巢癌血清标志物差异蛋白质组学的研究Analysis of serum biomarkers for CA125 negative ovarian epithelium cancer by comparative proteomics
赵群;段微;吴玉梅;钱小红;邓小虹;
摘要(Abstract)：
目的:通过二维差异凝胶电泳(2-DEDIGE)和基质辅助激光解吸离子化-飞行时间(MALDI-TOF/TOF)串联质谱差异蛋白质组学方法寻找CA125阴性卵巢上皮癌血清标志物,以提高卵巢上皮癌诊断的灵敏度和特异度。方法:收集103例卵巢上皮癌,60例正常对照,63例卵巢良性肿瘤、63例盆腔良性病变的血清。按年龄匹配,选取6例CA125阴性卵巢癌和6例正常对照组的血清等容积混合。祛除血清高丰度白蛋白和IgG后进行2-DEDIGE。实验重复3次。通过DeCyder软件分析得出有显著差异的蛋白质点,MALDI-TOF/TOF鉴定差异蛋白质。分别用WesternBlot和ELISA方法验证获选的血清标志物。结果:(1)经2-DEDIGE实验得出有显著差异的蛋白质点41个,MALDI-TOF/TOF成功鉴定了其中的28个蛋白质点。上调最显著的蛋白质点为结合珠蛋白(haptoglo-bin,Hp),下调最显著的蛋白质为转铁蛋白(transferrin,Tf);(2)WesternBlot和ELISA验证结果显示,CA125阴性卵巢上皮癌血清Hp和Tf与正常对照有显著差异(P<0.001);(3)CA125+Hp+Tf联合检测(两者或两者以上阳性判断为阳性)诊断卵巢上皮癌的灵敏度和特异度高于CA125、Hp和Tf单独检测。结论:Hp和Tf是卵巢上皮癌血清中差异表达的蛋白质,可作为卵巢上皮癌的血清标志物。CA125+Hp+Tf联合检测有助于提高卵巢上皮癌诊断的灵敏度和特异度,有助于提高CA125阴性卵巢上皮癌的检出率。
关键词(KeyWords)： 卵巢肿瘤;肿瘤标记,生物;双向差异凝胶电泳;触珠蛋白类;转铁蛋白
基金项目(Foundation): 北京市教育委员会科研基金资助项目(No:KM200710025028)
作者(Authors): 赵群;段微;吴玉梅;钱小红;邓小虹;
DOI: 10.13283/j.cnki.xdfckjz.2008.05.020
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