Abstract
目的 应用液体芯片-飞行时间质谱系统分析结膜松弛症患者的泪液蛋白质表达谱,寻找潜在具有结膜松弛症诊断意义的生物学标志物.方法 收集10例结膜松弛症患者和9例正常对照的泪液,利用毛细管法每眼收集15 μL泪液.经ClinProt磁珠纯化、基质辅助激光解析电离飞行时间质谱(MALDI-TOF-MS)分析及ClinProTools生物信息学软件研究其泪液蛋白表达谱,比较2组人群泪液蛋白质谱表达的差异.结果 2组共检测发现了77个蛋白质峰,其中13个蛋白质峰差异有统计学意义(P<0.05).其中质荷比(m/z)为1 632.48和3 401.87者为差异蛋白质,能较好地鉴别结膜松弛症组和正常对照组.结论 液体芯片-飞行时间质谱系统可高效、精确地筛查泪液蛋白质.结膜松弛症组与正常对照组泪液蛋白存在差异,值得进一步研究,可能对发现结膜松弛症的发病机制和寻求有效的防治手段有指导作用。
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