SRF and myocardin regulate LRP-mediated amyloid-beta clearance in brain vascular cells.

SRF and myocardin regulate LRP-mediated amyloid-beta clearance in brain vascular cells.
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DOI:
10.1038/ncb1819
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发表时间:
2009-02
影响因子:
21.3
通讯作者:
Zlokovic, Berislav V.
Zlokovic, Berislav V.
中科院分区:
生物学1区
文献类型:
--
作者:
Bell, Robert D.;Deane, Rashid;Chow, Nienwen;Long, Xiaochun;Sagare, Abhay;Singh, Itender;Streb, Jeffrey W.;Guo, Huang;Rubio, Anna;Van Nostrand, William;Miano, Joseph M.;Zlokovic, Berislav V.

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Amyloid β-peptide (Aβ) deposition in cerebral vessels contributes to cerebral amyloid angiopathy (CAA) in Alzheimer’s disease (AD). Here, we report that in AD patients and two mouse models of AD, overexpression of serum response factor (SRF) and myocardin (MYOCD) in cerebral vascular smooth muscle cells (VSMCs) generates an Aβ non-clearing VSMC phenotype through transactivation of sterol regulatory element binding protein-2, which downregulates low density lipoprotein receptor-related protein-1, a key Aβ clearance receptor. Hypoxia stimulated SRF/MYOCD expression in human cerebral VSMCs and in animal models of AD. We suggest that SRF and MYOCD function as a transcriptional switch, controlling Aβ cerebrovascular clearance and progression of AD.
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