进子素的零突变会导致与染色体17q21相关的泛素阳性前性痴呆症
Marc Cruts1, Ilse Gijselinck, Julie van der Zee
1Neurodegenerative Brain Diseases Group, Department of Molecular Genetics, Flanders Interuniversity Institute for Biotechnology, Universiteitsplein 1, BE-2610 Antwerpen, Belgium.
Nature
|July 25, 2006
概括
进子素 (PGRN) 基因的突变通过降低PGRN水平,导致神经退行导致前性痴呆症 (FTDU-17) . 在家族性FTD中,PGRN突变比MAPT突变更常见.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 前性痴呆症 (FTD) 与无处不在的免疫反应性神经元包容 (FTDU-17) 已与染色体17q21联系在一起,但缺乏tau病理.
- 在FTDU-17患者中,MAPT基因区域的突变和重组已经被排除在外.
研究的目的:
- 为了确定FTDU-17.7的遗传原因.
- 为了研究前列腺素 (PGRN) 在FTD病变发生中的作用.
主要方法:
- 用基因组测序和光 in situ 杂交来排除 MAPT 的参与.
- 对PGRN基因的突变分析,包括拼接供体部位和翻译启动代码.
- 转录和蛋白质分析以确认PGRN表达水平.
主要成果:
- FTDU-17是由PGRN基因的突变引起的.
- 鉴定到的突变包括一个拼接供体位的突变 (IVS0 + 5G > C) 和一个翻译启动密码子的突变 (c.3G > A).
- 这些突变导致PGRN表达减少和哈普隆不充分.
结论:
- 通过减少PGRN介导的神经元存活率,PGRN单元缺陷会导致神经退行.
- PGRN突变是家族性FTD的常见原因,比比利时队列中发生的MAPT突变多3.5倍.
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