Article (Scientific journals)
From methylation to myelination: epigenomic and transcriptomic profiling of chronic inactive demyelinated multiple sclerosis lesions.
Tiane, Assia; Schepers, Melissa; Reijnders, Rick A. et al.
2023In Acta Neuropathologica
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Keywords :
Epigenetic editing; Epigenetics; Oligodendrocyte; Progressive MS
Abstract :
[en] In the progressive phase of multiple sclerosis (MS), the hampered differentiation capacity of oligodendrocyte precursor cells (OPCs) eventually results in remyelination failure. We have previously shown that DNA methylation of Id2/Id4 is highly involved in OPC differentiation and remyelination. In this study, we took an unbiased approach by determining genome-wide DNA methylation patterns within chronically demyelinated MS lesions and investigated how certain epigenetic signatures relate to OPC differentiation capacity. We compared genome-wide DNA methylation and transcriptional profiles between chronically demyelinated MS lesions and matched normal-appearing white matter (NAWM), making use of post-mortem brain tissue (n = 9/group). DNA methylation differences that inversely correlated with mRNA expression of their corresponding genes were validated for their cell-type specificity in laser-captured OPCs using pyrosequencing. The CRISPR-dCas9-DNMT3a/TET1 system was used to epigenetically edit human-iPSC-derived oligodendrocytes to assess the effect on cellular differentiation. Our data show hypermethylation of CpGs within genes that cluster in gene ontologies related to myelination and axon ensheathment. Cell type-specific validation indicates a region-dependent hypermethylation of MBP, encoding for myelin basic protein, in OPCs obtained from white matter lesions compared to NAWM-derived OPCs. By altering the DNA methylation state of specific CpGs within the promotor region of MBP, using epigenetic editing, we show that cellular differentiation and myelination can be bidirectionally manipulated using the CRISPR-dCas9-DNMT3a/TET1 system in vitro. Our data indicate that OPCs within chronically demyelinated MS lesions acquire an inhibitory phenotype, which translates into hypermethylation of crucial myelination-related genes. Altering the epigenetic status of MBP can restore the differentiation capacity of OPCs and possibly boost (re)myelination.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Tiane, Assia
Schepers, Melissa
Reijnders, Rick A.
van Veggel, Lieve
Chenine, Sarah
Rombaut, Ben
Dempster, Emma
Verfaillie, Catherine
Wasner, Kobi
Grünewald, Anne  ;  University of Luxembourg > Luxembourg Centre for Systems Biomedicine (LCSB) > Molecular and Functional Neurobiology
Prickaerts, Jos
Pishva, Ehsan
Hellings, Niels
van den Hove, Daniel
Vanmierlo, Tim
More authors (5 more) Less
External co-authors :
yes
Language :
English
Title :
From methylation to myelination: epigenomic and transcriptomic profiling of chronic inactive demyelinated multiple sclerosis lesions.
Publication date :
2023
Journal title :
Acta Neuropathologica
ISSN :
1432-0533
Publisher :
Springer, Germany
Peer reviewed :
Peer Reviewed verified by ORBi
FnR Project :
FNR9631103 - Modelling Idiopathic Parkinson'S Disease-associated Somatic Variation In Dopaminergic Neurons, 2015 (01/01/2016-31/12/2022) - Anne Grünewald
Commentary :
© 2023. The Author(s).
Available on ORBilu :
since 08 June 2023

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