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Open Chromatin Profiling in hiPSC-Derived Neurons Prioritizes Functional Noncoding Psychiatric Risk Variants and Highlights Neurodevelopmental Loci.

Abstract：

:Most disease variants lie within noncoding genomic regions, making their functional interpretation challenging. Because chromatin openness strongly influences transcriptional activity, we hypothesized that cell-type-specific open chromatin regions (OCRs) might highlight disease-relevant noncoding sequences. To investigate, we mapped global OCRs in neurons differentiating from hiPSCs, a cellular model for studying neurodevelopmental disorders such as schizophrenia (SZ). We found that the OCRs are highly dynamic and can stratify GWAS-implicated SZ risk variants. Of the more than 3,500 SZ-associated variants analyzed, we prioritized ∼100 putatively functional ones located in neuronal OCRs, including rs1198588, at a leading risk locus flanking MIR137. Excitatory neurons derived from hiPSCs with CRISPR/Cas9-edited rs1198588 or a rare proximally located SZ risk variant showed altered MIR137 expression, dendrite arborization, and synapse maturation. Our study shows that noncoding disease variants in OCRs can affect neurodevelopment, and that analysis of open chromatin regions can help prioritize functionally relevant noncoding variants identified by GWAS.

journal_name

Cell Stem Cell

journal_title

Cell stem cell

authors

Forrest MP,Zhang H,Moy W,McGowan H,Leites C,Dionisio LE,Xu Z,Shi J,Sanders AR,Greenleaf WJ,Cowan CA,Pang ZP,Gejman PV,Penzes P,Duan J

doi

10.1016/j.stem.2017.07.008

subject

Has Abstract

pub_date

2017-09-07 00:00:00

pages

305-318.e8

issue

3

eissn

1934-5909

issn

1875-9777

pii

S1934-5909(17)30287-4

journal_volume

21

pub_type

杂志文章

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