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@ARTICLE{Younas:153365,
author = {Younas, Neelam and Zafar, Saima and Shafiq, Mohsin and
Noor, Aneeqa and Siegert, Anna and Arora, Amandeep Singh and
Galkin, Alexey and Zafar, Ayesha and Schmitz, Matthias and
Stadelmann, Christine and Andreoletti, Olivier and Ferrer,
Isidre and Zerr, Inga},
title = {{SFPQ} and {T}au: critical factors contributing to rapid
progression of {A}lzheimer's disease.},
journal = {Acta neuropathologica},
volume = {140},
number = {3},
issn = {1432-0533},
address = {Heidelberg},
publisher = {Springer},
reportid = {DZNE-2020-01362},
pages = {317 - 339},
year = {2020},
abstract = {Dysfunctional RNA-binding proteins (RBPs) have been
implicated in several neurodegenerative disorders. Recently,
this paradigm of RBPs has been extended to pathophysiology
of Alzheimer's disease (AD). Here, we identified disease
subtype specific variations in the RNA-binding proteome
(RBPome) of sporadic AD (spAD), rapidly progressive AD
(rpAD), and sporadic Creutzfeldt Jakob disease (sCJD), as
well as control cases using RNA pull-down assay in
combination with proteomics. We show that one of these
identified proteins, splicing factor proline and glutamine
rich (SFPQ), is downregulated in the post-mortem brains of
rapidly progressive AD patients, sCJD patients and 3xTg mice
brain at terminal stage of the disease. In contrast, the
expression of SFPQ was elevated at early stage of the
disease in the 3xTg mice, and in vitro after oxidative
stress stimuli. Strikingly, in rpAD patients' brains SFPQ
showed a significant dislocation from the nucleus and
cytoplasmic colocalization with TIA-1. Furthermore, in rpAD
brain lesions, SFPQ and p-tau showed extranuclear
colocalization. Of note, association between SFPQ and
tau-oligomers in rpAD brains suggests a possible role of
SFPQ in oligomerization and subsequent misfolding of tau
protein. In line with the findings from the human brain, our
in vitro study showed that SFPQ is recruited into
TIA-1-positive stress granules (SGs) after oxidative stress
induction, and colocalizes with tau/p-tau in these granules,
providing a possible mechanism of SFPQ dislocation through
pathological SGs. Furthermore, the expression of human tau
in vitro induced significant downregulation of SFPQ,
suggesting a causal role of tau in the downregulation of
SFPQ. The findings from the current study indicate that the
dysregulation and dislocation of SFPQ, the subsequent
DNA-related anomalies and aberrant dynamics of SGs in
association with pathological tau represents a critical
pathway which contributes to rapid progression of AD.},
keywords = {Alzheimer Disease: metabolism / Alzheimer Disease:
pathology / Animals / Brain: metabolism / Brain: pathology /
Creutzfeldt-Jakob Syndrome: metabolism / Cytoplasm:
metabolism / Down-Regulation: physiology / Humans / Mice,
Transgenic / PTB-Associated Splicing Factor: metabolism /
RNA-Binding Proteins: genetics / RNA-Binding Proteins:
metabolism / tau Proteins: metabolism},
cin = {Ext UMG Zerr / AG Zerr / Göttingen Pre 2020},
ddc = {610},
cid = {I:(DE-2719)5000037 / I:(DE-2719)1440011-1 /
I:(DE-2719)6000014},
pnm = {344 - Clinical and Health Care Research (POF3-344)},
pid = {G:(DE-HGF)POF3-344},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:32577828},
pmc = {pmc:PMC7423812},
doi = {10.1007/s00401-020-02178-y},
url = {https://pub.dzne.de/record/153365},
}