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Proteomic Analysis of Rat Brain Stem with DAI by MALDI-TOF-MS
Author(s): REN Guanheng, LIU Ningguo, CHEN Yijiu, SHI Zuo, ZOU Donghua, HUANG Ping, LI Zhengdong, SHAO Zuo, DENG Zuofei
Pages: 13-
17
Year: 2016
Issue:
1
Journal: Journal of Forensic Medicine
Keyword: forensic pathology; diffuse axonal injury; mass spectrometry; matrix-assisted laser desorption-ionization; brain stem; rats;
Abstract: 目的 应用基质辅助激光解吸/电离-飞行时间质谱(matrix-assisted laser desorption/ionization time-of-flight mass spectrometry,MALDI-TOF-MS)技术建立弥漫性轴索损伤(diffuse axonal injury,DAI)诊断模型,筛选DAI相关蛋白或多肽,为寻找DAI的分子标志物提供理论基础.方法 将15只雄性SD大鼠随机分为DAI组(n=10)和对照组(n=5),采用MALDI-TOF-MS技术对两组大鼠脑干组织的蛋白或多肽表达谱进行检测,运用ClinProTools 2.2分析软件筛选出具有差异的分子峰,应用遗传算法建立诊断模型. 结果 筛选出有差异的分子峰61个(P<0.05),其中DAI组有9个分子峰下调,52个分子峰上调.筛选出5个分子峰建立诊断模型,交叉验证的特异性为96.14%、敏感性为95.98%,盲法验证结果的特异性为73.33%、敏感性为70.00%. 结论 应用MALDI-TOF-MS技术不仅能够建立特异性和敏感性较高的DAI诊断模型,还可以筛选差异蛋白或多肽,为DAI的法医学鉴定奠定理论基础.
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