Abstract:
:Alzheimer's disease (AD) and related tauopathies comprise a large group of neurodegenerative diseases associated with the pathological aggregation of tau protein. While much effort has focused on understanding the function of tau, little is known about the endogenous mechanisms regulating tau metabolism in vivo and how these contribute to disease. Previously, we have shown that the microRNA (miRNA) cluster miR-132/212 is downregulated in tauopathies such as AD. Here, we report that miR-132/212 deficiency in mice leads to increased tau expression, phosphorylation and aggregation. Using reporter assays and cell-based studies, we demonstrate that miR-132 directly targets tau mRNA to regulate its expression. We identified GSK-3β and PP2B as effectors of abnormal tau phosphorylation in vivo. Deletion of miR-132/212 induced tau aggregation in mice expressing endogenous or human mutant tau, an effect associated with autophagy dysfunction. Conversely, treatment of AD mice with miR-132 mimics restored in part memory function and tau metabolism. Finally, miR-132 and miR-212 levels correlated with insoluble tau and cognitive impairment in humans. These findings support a role for miR-132/212 in the regulation of tau pathology in mice and humans and provide new alternatives for therapeutic development.
journal_name
Hum Mol Genetjournal_title
Human molecular geneticsauthors
Smith PY,Hernandez-Rapp J,Jolivette F,Lecours C,Bisht K,Goupil C,Dorval V,Parsi S,Morin F,Planel E,Bennett DA,Fernandez-Gomez FJ,Sergeant N,Buée L,Tremblay MÈ,Calon F,Hébert SSdoi
10.1093/hmg/ddv377subject
Has Abstractpub_date
2015-12-01 00:00:00pages
6721-35issue
23eissn
0964-6906issn
1460-2083pii
ddv377journal_volume
24pub_type
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