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基于蛋白质组学技术筛选唐氏妊娠母体血清蛋白标志物的研究

, PP. 464-469

Keywords: 唐氏综合征,CFHR,Kininogen,母体血清,产前筛查

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Abstract:

目的筛选唐氏(DS)妊娠母体血清蛋白标志物,初步验证其临床应用价值。方法收集确诊为DS妊娠的母体血清(DS组)和正常孕妇血清标本(对照组)各6例(均为16孕周采集),经二维凝胶电泳(2-DE)获得2组血清蛋白电泳图像,比较2组间蛋白含量变化,选取差异显著的蛋白质点进行生物质谱分析与鉴定,并采用Westernblot方法验证筛选获得的血清蛋白标志物在DS妊娠母体血清中的变化情况(n=12)。结果通过2-DE图谱分析,共筛选出29个表达显著差异的血清蛋白质点。从中选取6个表达差异较大的蛋白质点,经生物质谱技术分析和NCBI数据库搜索与匹配,发现CFHR1和Kininogen1等10个蛋白质与其匹配的可能性较大(匹配分值>66分)。Westernblot结果显示,CFHR1和Kininogen1在DS组的积分光密度值分别为(5687.0±727.8)和(133451.8±32118.8),均明显高于对照组水平[(1414.1±715.6)(P<0.01)和(33073.9±14390.4)(P<0.05)]。结论2-DE和生物质谱分析是筛选蛋白质标志物的可靠方法,Westernblot结果证实CFHR1和Kininogen1的异常变化可能与DS妊娠密切相关,有望成为DS早期产前筛查的母体血清蛋白新标志物。

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