کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6810383 | 1433611 | 2011 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Membrane cholesterol enrichment prevents Aβ-induced oxidative stress in Alzheimer's fibroblasts
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
سالمندی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A growing body of evidence implicates low membrane cholesterol in the pathogenesis of Alzheimer's disease (AD). Here we show that Aβ42 soluble oligomers accumulate more slowly and in reduced amount at the plasma membranes of PS-1L392V and APPV717I fibroblasts from familial AD (FAD) patients enriched in cholesterol content than at the counterpart membranes. The Aβ42-induced production of reactive oxygen species (ROS) and the increase in membrane lipoperoxidation were also prevented by high membrane cholesterol, thus resulting in a higher resistance to amyloid toxicity with respect to control fibroblasts. On the other hand, the recruitment of amyloid assemblies to the plasma membrane of cholesterol-depleted fibroblasts was significantly increased, thus triggering an earlier and sharper production of ROS and a higher membrane oxidative injury. These results identify membrane cholesterol as being key to Aβ42 oligomer accumulation at the cell surfaces and to the following Aβ42-induced cell death in AD neurons.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neurobiology of Aging - Volume 32, Issue 2, February 2011, Pages 210-222
Journal: Neurobiology of Aging - Volume 32, Issue 2, February 2011, Pages 210-222
نویسندگان
Anna Pensalfini, Mariagioia Zampagni, Gianfranco Liguri, Matteo Becatti, Elisa Evangelisti, Claudia Fiorillo, Silvia Bagnoli, Elena Cellini, Benedetta Nacmias, Sandro Sorbi, Cristina Cecchi,