Journal Article

DZNE-2020-06092

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Regional and subtype-dependent miRNA signatures in sporadic Creutzfeldt-Jakob disease are accompanied by alterations in miRNA silencing machinery and biogenesis.

Llorens, F. (Corresponding author) ; Thüne, K.DZNE* ; Martí, E. ; Kanata, E. ; Dafou, D. ; Díaz-Lucena, D. ; Vivancos, A. ; Shomroni, O.DZNE* ; Zafar, S.DZNE* ; Schmitz, M.DZNE* ; Michel, U. ; Fernández-Borges, N. ; Andréoletti, O. ; Del Río, J. A. ; Díez, J. ; Fischer, A.DZNE* ; Bonn, S.DZNE* ; Sklaviadis, T. ; Torres, J. M. ; Ferrer, I. ; Zerr, I. (Last author)DZNE*

2018
PLoS Lawrence, Kan.

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Please use a persistent id in citations: doi:10.1371/journal.ppat.1006802

Abstract: Increasing evidence indicates that microRNAs (miRNAs) are contributing factors to neurodegeneration. Alterations in miRNA signatures have been reported in several neurodegenerative dementias, but data in prion diseases are restricted to ex vivo and animal models. The present study identified significant miRNA expression pattern alterations in the frontal cortex and cerebellum of sporadic Creutzfeldt-Jakob disease (sCJD) patients. These changes display a highly regional and disease subtype-dependent regulation that correlates with brain pathology. We demonstrate that selected miRNAs are enriched in sCJD isolated Argonaute(Ago)-binding complexes in disease, indicating their incorporation into RNA-induced silencing complexes, and further suggesting their contribution to disease-associated gene expression changes. Alterations in the miRNA-mRNA regulatory machinery and perturbed levels of miRNA biogenesis key components in sCJD brain samples reported here further implicate miRNAs in sCJD gene expression (de)regulation. We also show that a subset of sCJD-altered miRNAs are commonly changed in Alzheimer's disease, dementia with Lewy bodies and fatal familial insomnia, suggesting potential common mechanisms underlying these neurodegenerative processes. Additionally, we report no correlation between brain and cerebrospinal fluid (CSF) miRNA-profiles in sCJD, indicating that CSF-miRNA profiles do not faithfully mirror miRNA alterations detected in brain tissue of human prion diseases. Finally, utilizing a sCJD MM1 mouse model, we analyzed the miRNA deregulation patterns observed in sCJD in a temporal manner. While fourteen sCJD-related miRNAs were validated at clinical stages, only two of those were changed at early symptomatic phase, suggesting that the miRNAs altered in sCJD may contribute to later pathogenic processes. Altogether, the present work identifies alterations in the miRNA network, biogenesis and miRNA-mRNA silencing machinery in sCJD, whereby contributions to disease mechanisms deserve further investigation.

Keyword(s): Adult (MeSH) ; Aged (MeSH) ; Aged, 80 and over (MeSH) ; Brain: metabolism (MeSH) ; Brain: pathology (MeSH) ; Case-Control Studies (MeSH) ; Creutzfeldt-Jakob Syndrome: classification (MeSH) ; Creutzfeldt-Jakob Syndrome: genetics (MeSH) ; Creutzfeldt-Jakob Syndrome: pathology (MeSH) ; Female (MeSH) ; Gene Expression Profiling (MeSH) ; Humans (MeSH) ; Male (MeSH) ; MicroRNAs: biosynthesis (MeSH) ; MicroRNAs: genetics (MeSH) ; Middle Aged (MeSH) ; RNA Interference (MeSH) ; Transcriptome (MeSH) ; MicroRNAs

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Contributing Institute(s):

1. Translational Studies and Biomarkers (AG Zerr)
2. Ext UMG Zerr (Ext UMG Zerr)
3. Computational analysis of biological networks (AG Bonn 1)
4. Epigenetics and Systems Medicine in Neurodegenerative Diseases (AG Fischer 1)

Research Program(s):

1. 344 - Clinical and Health Care Research (POF3-344) (POF3-344)
2. 342 - Disease Mechanisms and Model Systems (POF3-342) (POF3-342)

Appears in the scientific report 2018

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Database coverage:
; ; ; ; BIOSIS Previews ; Clarivate Analytics Master Journal List ; Current Contents - Life Sciences ; DOAJ Seal ; Ebsco Academic Search ; IF >= 5 ; JCR ; SCOPUS ; Web of Science Core Collection

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