普罗利尔异构酶Pin1调节了粉样蛋白前体蛋白加工和粉样β生产
Lucia Pastorino1, Anyang Sun, Pei-Jung Lu
1Cancer Biology Program, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215, USA.
Nature
|March 24, 2006
概括
Pin1 prolyl异构酶调节了粉样蛋白前体蛋白 (APP) 的加工和粉样β (Abeta) 的产生. Pin1放松调节增加了有毒的Abeta42,在阿尔茨海默病中将tau和Abeta病理联系起来.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 阿尔茨海默病 (AD) 的特征是神经纤维状结 (tau) 和粉样蛋白斑块 (粉样蛋白-β,阿贝塔).
- 在阿尔茨海默病的发病过程中,和阿贝塔之间的关系尚未完全理解.
- 一个prolyl异构酶Pin1调节蛋白质构造,并与AD病原发生有关.
研究的目的:
- 调查Pin1在粉样前体蛋白 (APP) 加工和阿贝塔生产中的作用.
- 阐明Pin1影响APP细胞内域 (AICD) 构成的机制.
- 在阿尔茨海默氏病模型中确定Pin1介导调节的病理意义.
主要方法:
- 核磁共振 (NMR) 谱学用于可视化AICD形状.
- 细胞培养实验以评估阿贝塔分泌.
- 具有Pin1淘汰和/或突变APP过度表达的小鼠模型.
- 免疫组织化学定位Abeta42在大脑中的位置.
主要成果:
- Pin1与APP中的酸化Thr668-Pro基因结合,加速AICD异构化超过1000倍.
- 过度表达Pin1会减少阿贝塔分泌,而Pin1淘汰会增加它.
- 在小鼠中的Pin1淘汰赛以年龄取决的方式提高了氨基原蛋白APP处理和不溶性Abeta42.
结论:
- 1催化普罗利尔异化是一种用于APP加工和阿贝塔生产的新型调节机制.
- 在阿尔茨海默病中,Pin1活动的放松调节可能会将tau和Abeta病理联系起来.
- 准Pin1为阿尔茨海默病提供了潜在的治疗策略.
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