Apolipoprotein E alters the processing of the β-amyloid precursor protein in APPV717F transgenic mice

Apolipoprotein E alters the processing of the β-amyloid precursor protein in APPV717F transgenic mice
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DOI:
10.1016/s0006-8993(02)03437-6
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发表时间:
2002-11-15
期刊:
影响因子:
2.9
通讯作者:
Paul, SM
Paul, SM
中科院分区:
医学3区
文献类型:
--
作者:
Dodart, JC;Bales, KR;Paul, SM

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我们最近报道了载脂蛋白 E (apoE) 在 APP(V717F) 转基因 (Tg) 小鼠(阿尔茨海默病 (AD) 动物模型)淀粉样蛋白沉积和神经炎斑形成过程中的关键作用。在本研究中,我们研究了 apoE 的存在或缺失是否会改变淀粉样前体蛋白 (APP) 加工成各种片段,包括 β-淀粉样肽 (Abeta)。在这里,我们表明,与表达 apoE 的 APP(V717F) Tg 小鼠相比,缺乏 apoE 的 APP(V717F) Tg 小鼠会形成抗 Abeta 免疫活性多焦点聚集体,其中含有 APP 的 β 切割 C 端片段 (β-CTF)。与表达 apoE 的 Tg 小鼠相比,缺乏 apoE 的 Tg 小鼠还表现出成熟全长 APP 水平的改变、β-CTF 数量的增加以及 Abeta (1-40) 和 Abeta (1-42) 水平的升高,且呈年龄和区域依赖性。总而言之,这些数据支持 apoE 在体内 APP 处理中的作用。 (C) 2002 Elsevier Science B.V. 保留所有权利。
We have recently reported a critical role for apolipoprotein E (apoE) in the process of amyloid deposition and neuritic plaque formation in APP(V717F) transgenic (Tg) mice, an animal model of Alzheimer's disease (AD). In the present study, we have investigated whether the presence or absence of apoE alters the processing of the amyloid precursor protein (APP) to various fragments, including the beta-amyloid peptides (Abeta). Here we show that, in contrast to APP(V717F) Tg mice expressing apoE, APP(V717F) Tg mice deficient in apoE develop anti-Abeta ininumoreactive multifocal aggregates, which contain the beta-cleaved C-terminal fragments (beta-CTFs) of APP. Tg mice deficient in apoE also display altered levels of mature full-length APP, increased amounts of beta-CTFs, as well as elevated levels of Abeta(1-40) and Abeta(1-42) in an age- and region-dependent manner when compared to Tg mice expressing apoE. Taken together, these data support a role for apoE in APP processing in vivo. (C) 2002 Elsevier Science B.V. All rights reserved.