中文

ADAM30 通过组织蛋白酶 D 激活下调阿尔茨海默病中 APP 相关缺陷

神经元与认知 2019-06-19 v1 组织与器官

摘要

尽管已有若干 ADAMs(去整合素样金属蛋白酶)被证明参与淀粉样前体蛋白(APP)代谢,但参与该代谢的金属蛋白酶的完整谱系仍有待确定。以金属蛋白酶基因为中心的转录组学分析揭示了 ADAM30 表达下降 50%,且与阿尔茨海默病脑中的淀粉样蛋白负荷呈负相关。相应地,体外 ADAM30 表达的下调或上调分别引起 Aβ\beta 肽水平升高或降低,而表达无生物学活性的 ADAM30(ADAM30 mut)不影响 Aβ\beta 分泌。蛋白质组学/基于细胞的实验表明,ADAM30 依赖的 APP 代谢调控需要组织蛋白酶 D(CTSD)的激活以及 APP 向溶酶体的分选。相应地,在阿尔茨海默病样转基因小鼠中,神经元 ADAM30 过表达降低了原代神经元培养物中的 Aβ\beta42 分泌、脑内可溶性 Aβ\beta42 和淀粉样斑块负荷水平,同时增强了 CTSD 活性,并最终挽救了长时程增强。

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引用

@article{arxiv.1906.07511,
  title  = {ADAM30 Downregulates APP-Linked Defects Through Cathepsin D Activation in Alzheimer's Disease},
  author = {Florent Letronne and Geoffroy Laumet and Anne-Marie Ayral and Julien Chapuis and Florie Demiautte and Mathias Laga and Michel Vandenberghe and Nicolas Malmanche and Florence Leroux and Fanny Eysert and Yoann Sottejeau and Linda Chami and Amandine Flaig and Charlotte Bauer and Pierre Dourlen and Marie Lesaffre and Charlotte Delay and Ludovic Huot and Julie Dumont and Elisabeth Werkmeister and Franck Lafont and Tiago Mendes and Franck Hansmannel and Bart Dermaut and Benoit Deprez and Anne-Sophie Herard and Marc Dhenain and Nicolas Souedet and Florence Pasquier and David Tulasne and Claudine Berr and Jean-Jacques Hauw and Yves Lemoine and Philippe Amouyel and David Mann and Rebecca Déprez and Frédéric Checler and David Hot and Thierry Delzescaux and Kris Gevaert and Jean-Charles Lambert},
  journal= {arXiv preprint arXiv:1906.07511},
  year   = {2019}
}