کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
329158 1433601 2011 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
LRP1 mediates bidirectional transcytosis of amyloid-β across the blood-brain barrier
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی سالمندی
پیش نمایش صفحه اول مقاله
LRP1 mediates bidirectional transcytosis of amyloid-β across the blood-brain barrier
چکیده انگلیسی
According to the “amyloid hypothesis”, the amyloid-β (Aβ) peptide is the toxic intermediate driving Alzheimer's disease (AD) pathogenesis. Recent evidence suggests that the low density lipoprotein receptor-related protein 1 (LRP1) transcytoses Aβ out of the brain across the blood-brain barrier (BBB). To provide genetic evidence for LRP1-mediated transcytosis of Aβ across the BBB we analyzed Aβ transcytosis across primary mouse brain capillary endothelial cells (pMBCECs) derived from wild-type and LRP1 knock-in mice. Here, we show that pMBCECs in vitro express functionally active LRP1. Moreover, we demonstrate that LRP1 mediates transcytosis of [125I]-Aβ1-40 across pMBCECs in both directions, whereas no role for LRP1-mediated Aβ degradation was detected. Analysis of [125I]-Aβ1-40 transport across pMBCECs generated from mice harboring a knock-in mutation in the NPxYxxL endocytosis/sorting domain of endogenous LRP1 revealed a reduced Aβ clearance from brain-to-blood and blood-to-brain compared with wild-type derived pMBCECs. Therefore, for the first time, we present genetic evidence that LRP1 modulates the pathogenic actions of soluble Aβ in the brain by clearing Aβ across the BBB.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neurobiology of Aging - Volume 32, Issue 12, December 2011, Pages 2323.e1-2323.e11
نویسندگان
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