南方医科大学学报 ›› 2004, Vol. 24 ›› Issue (11): 1217-1222,1226.

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海马组织分区膜质分离后亚蛋白质组分析方法的建立

陈亮1, 杨建明1, 李晓明1, 李晓文1, 高天明1,2   

  1. 1. 南方医科大学生理教研室, 广东, 广州, 510515;
    2. 南方医科大学解剖学教研室, 广东, 广州, 510515
  • 出版日期:2004-11-20 发布日期:2004-11-20
  • 基金资助:
    基金项目:Supported by for National Natural Science Foundation of ChinaOutstanding Young Scientists (No.30125013;303300240) and Foundationfor Outstanding Young Scientists of PLA (01J009);and Cheung KingScholars Program of China.
    作者简介:Gao Tian-ming,Tel:86-20-61648216,E-mail:tgao@fimmu.com
    通讯作者:Gao Tian-ming,Tel:86-20-61648216,E-mail:tgao@fimmu.com

Two-dimensional electrophoretic separation of subproteomes in adult rat hippocampal subregions after membrane protein enrichment with sequential extraction

CHEN Liang1, YANG Jian-ming1, LI Xiao-ming1, LI Xiao-wen1, GAO Tian-ming1,2   

  1. 1. 南方医科大学生理教研室, 广东, 广州, 510515;
    2. 南方医科大学解剖学教研室, 广东, 广州, 510515
  • Online:2004-11-20 Published:2004-11-20

摘要: 目的 建立适合研究膜质分离后海马组织不同分区亚蛋白质组的实验方法。方法 显微切割获得成年大鼠海马不同解剖分区,然后按溶解性不同使用顺序抽提法细胞质和细胞膜蛋白,双向电泳进行分离蛋白后,采用与质谱兼容的高敏感银染显示蛋白斑点,经专业图像软件分析处理评价电泳效果。结果 海马各个分区组织中膜蛋白得到有效富集,其中海马齿状回富集效率达8倍,图谱中可以显现的总蛋白斑点数目比传统方法增多30%。结论 建立了理想的海马组织分区亚蛋白质组图谱,对膜蛋白实现了有效的富集,可以用于研究不同解剖分区在蛋白水平上的差异,为学习记忆、中枢神经缺血缺氧性损伤等多种后继研究提供了平台。

Abstract: Objective To establish a method for analysis of the subproteomes following membrane protein enrichment, so as to investigate the differences in cytosolic and membrane protein/peptide contents among different hippocampal subregions (CA1, CA3 and dentate gyrus) of rats.Methods The hippocampal subregions were isolated by microdissection, and after membrane protein enrichment with protein solubility-based sequential sample extraction, subproteome profiling was accomplished using modified two-dimensional electrophoresis and silver staining method compatible with high-performance mass spectrometry, which displayed cytosolic or membrane proteins/peptides separately. The efficacy of the electrophoresis was evaluated by image analyzing software.Results The membrane proteins were enriched by 8 folds, and around 30% more spots were shown on the integrated dentate gyrus map than on the conventional map obtained by one-step protein extraction. Such improvement could also be seen in protein mapping of CA1 and CA3 regions.Conclusion When analyzing hippocampal subregions sequential extraction and two-dimensional electrophoresis more effectively separate and display enriched membrane protein/peptides, which may play important roles in such cellular events as signal transduction.

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