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Marked Differences in C9orf72 Methylation Status and Isoform Expression between C9/ALS Human Embryonic and Induced Pluripotent Stem Cells.

Abstract：

:We established two human embryonic stem cell (hESC) lines with a GGGGCC expansion in the C9orf72 gene (C9), and compared them with haploidentical and unrelated C9 induced pluripotent stem cells (iPSCs). We found a marked difference in C9 methylation between the cells. hESCs and parental fibroblasts are entirely unmethylated while the iPSCs are hypermethylated. In addition, we show that the expansion alters promoter usage and interferes with the proper splicing of intron 1, eventually leading to the accumulation of repeat-containing mRNA following neural differentiation. These changes are attenuated in C9 iPSCs, presumably owing to hypermethylation. Altogether, this study highlights the importance of neural differentiation in the pathogenesis of disease and points to the potential role of hypermethylation as a neuroprotective mechanism against pathogenic mRNAs, envisaging a milder phenotype in C9 iPSCs.

journal_name

Stem Cell Reports

journal_title

Stem cell reports

authors

Cohen-Hadad Y,Altarescu G,Eldar-Geva T,Levi-Lahad E,Zhang M,Rogaeva E,Gotkine M,Bartok O,Ashwal-Fluss R,Kadener S,Epsztejn-Litman S,Eiges R

doi

10.1016/j.stemcr.2016.09.011

subject

Has Abstract

pub_date

2016-11-08 00:00:00

pages

927-940

issue

5

issn

2213-6711

pii

S2213-6711(16)30217-X

journal_volume

7

pub_type

杂志文章

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