Up-regulation of casein kinase 1ε is involved in tau pathogenesis in Alzheimer's disease.

Abstract:

:Hyperphosphorylation of tau and imbalanced expression of 3R-tau and 4R-tau as a result of dysregulation of tau exon 10 splicing are believed to be pivotal to the pathogenesis of tau pathology, but the molecular mechanism leading to the pathologic tau formation in Alzheimer's disease (AD) brain is not fully understood. In the present study, we found that casein kinase 1ε (CK1ε) was increased significantly in AD brains. Overexpression of CK1ε in cultured cells led to increased tau phosphorylation at many sites. Moreover, we found that CK1ε suppressed tau exon 10 inclusion. Levels of CK1ε were positively correlated to tau phosphorylation, 3R-tau expression and tau pathology, and negatively correlated to 4R-tau in AD brains. Overexpression of CK1ε in the mouse hippocampus increased tau phosphorylation and impaired spontaneous alternation behavior. These data suggest that CK1ε is involved in the regulation of tau phosphorylation, the alternative splicing of tau exon 10, and cognitive performance. Up-regulation of CK1ε might contribute to tau pathology by hyperphosphorylating tau and by dysregulating the alternative splicing of tau exon 10 in AD.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Chen C,Gu J,Basurto-Islas G,Jin N,Wu F,Gong CX,Iqbal K,Liu F

doi

10.1038/s41598-017-13791-5

subject

Has Abstract

pub_date

2017-10-18 00:00:00

pages

13478

issue

1

issn

2045-2322

pii

10.1038/s41598-017-13791-5

journal_volume

7

pub_type

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