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胎儿生长受限子代大鼠与正常大鼠海马蛋白
质组双向电泳图谱比较
作者:黄谱,苟文丽,米阳,张瑞,孙云萍
【摘要】 目的 比较胎儿生长受限(FGR)子代大鼠与正常大鼠
海马蛋白质组双向电泳图谱的差异,探索蛋白质组学技术在 FGR 引起
子代神经系统发育异常的研究中应用的可能性。方法 建立 SD 大鼠的
FGR 模型,分离子代大鼠海马组织并提取总蛋白;进行双向电泳,比
较 FGR 子代大鼠与正常大鼠海马组织的蛋白质表达差异。结果 FGR 子
代大鼠与正常大鼠海马组织双向电泳图谱分别检出 647 和 626 个蛋白
点, 2 张电泳图进行匹配后发现有 18 个蛋白点仅在 FGR 子代大鼠海 对
马蛋白双向电泳图谱中表达,28 个蛋白在 2 组大鼠海马组织中含量发
生了 3 倍以上的变化,其中 FGR 组上调 25 个,下调 3 个。结论 初步
建立了 FGR 动物模型比较蛋白质组学的技术方法;FGR 子代大鼠海马
蛋白质组与正常大鼠存在明显差异,差异点的发现为深入研究 FGR 引
起子代高级神经活动异常的发病机制提供了有益的线索。
【关键词】 胎儿生长受限;海马;学习记忆;双向电泳
ABSTRACT: Objective To compare the global protein
patterns between the hippocampus of fetal growth restriction
(FGR) offspring rats and control rats hippocampus by means of
two dimensional electrophoresis (2 DE) so as to explore the
possibility of applying proteomics technology in research on
FGR induced developmental abnormality of the offspring s
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nervous system. Methods FGR model of Sprague Dawley rats was
constructed according to the method of passive smoking. The
offspring were assigned into FGR group and control group. The
hippocampus proteins were extracted. 2 dimensional
electrophoresis was conducted to compare hippocampus protein
expression between FGR offspring rats and normal rats.
Electrophoregrams were obtained with immobilized pH gradient
(IPG) isoelectric focusing electrophoresis as the first
dimension, and then with vertical SDS PAGE electrophoresis as
the second. The electrophoregrams were visualized using silver
staining and analyzed with ImageMaster software. Results
Totally 647 and 626 protein spots were obtained in the offspring
of FGR rats and control rats hippocampus maps respectively, of
which 28 spots increased or decreased in quantity. Other 18 spots
were found exclusively in FGR group hippocampus maps. Conclusion
Proteomics method of FGR was established. The differentially
displayed proteins may provide further insight into molecular
mechanisms of abnormality of neural system development of FGR
offspring.
KEY WORDS: fetal growth restriction (FGR); hippocampus;
learning and memory; 2 dimensional electrophoresis
Supported by the National Natural Science Foundation of China
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(No.) and the Key Sci tech Research Project of Shaanxi Province
(No.2004K17 G11)
胎儿生长受限(fetal growth restriction, FGR)是指各种因
素导致胎儿在宫内生长发育受到限制,是造成围生儿病率的主要原因
之一[1]。FGR 子代智力发育水平可能有所下降[2 3],我们前期的研
究从行为学角度已证明,FGR 子代大鼠的水迷宫测试成绩下降,提示
孕期发生 FGR 对胚胎和胎儿脑组织的发育有所影响,并对出生后子代
早期及远期空间学习记忆能力造成损害[4]。 海马是边缘系统的重要组
成部分,在学习记忆、情绪反应及植物神经性功能等方面发挥着重要
作用。 蛋白质组学(proteomics)技术是利用双向电泳(2 dimensional
electrophoresis, 2 DE)对组织进行大规模蛋白分离,然后应用质谱
等技术对分离的差异蛋白进行鉴定,通过比较正常与疾病组织的差异
表达蛋白,寻找疾病相关蛋白质。本研究应用双向电泳技术,通过比
较 FGR 子代大鼠与正常大鼠海马蛋白质组双向电泳图谱差异,从蛋白
分子水平探索 FGR 子代大鼠海马蛋白质组的变化及 FGR 在子代大鼠学
习记忆障碍中的作用机制,为防治 FGR 子代智力异常提供新的线索和
理论基础。
1 材料与方法
1.1 实验动物
选取体重 230~260g 的健康成年 Sprague Dawley(SD)大鼠
(西安交通大学医学院实验动物中心提供)。
1.2 主要试剂与仪器
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