Functional importance of cardiac enhancer-associated noncoding RNAs in heart development and disease.

Abstract:

:The key information processing units within gene regulatory networks are enhancers. Enhancer activity is associated with the production of tissue-specific noncoding RNAs, yet the existence of such transcripts during cardiac development has not been established. Using an integrated genomic approach, we demonstrate that fetal cardiac enhancers generate long noncoding RNAs (lncRNAs) during cardiac differentiation and morphogenesis. Enhancer expression correlates with the emergence of active enhancer chromatin states, the initiation of RNA polymerase II at enhancer loci and expression of target genes. Orthologous human sequences are also transcribed in fetal human hearts and cardiac progenitor cells. Through a systematic bioinformatic analysis, we identified and characterized, for the first time, a catalog of lncRNAs that are expressed during embryonic stem cell differentiation into cardiomyocytes and associated with active cardiac enhancer sequences. RNA-sequencing demonstrates that many of these transcripts are polyadenylated, multi-exonic long noncoding RNAs. Moreover, knockdown of two enhancer-associated lncRNAs resulted in the specific downregulation of their predicted target genes. Interestingly, the reactivation of the fetal gene program, a hallmark of the stress response in the adult heart, is accompanied by increased expression of fetal cardiac enhancer transcripts. Altogether, these findings demonstrate that the activity of cardiac enhancers and expression of their target genes are associated with the production of enhancer-derived lncRNAs.

journal_name

J Mol Cell Cardiol

authors

Ounzain S,Pezzuto I,Micheletti R,Burdet F,Sheta R,Nemir M,Gonzales C,Sarre A,Alexanian M,Blow MJ,May D,Johnson R,Dauvillier J,Pennacchio LA,Pedrazzini T

doi

10.1016/j.yjmcc.2014.08.009

subject

Has Abstract

pub_date

2014-11-01 00:00:00

pages

55-70

eissn

0022-2828

issn

1095-8584

pii

S0022-2828(14)00256-9

journal_volume

76

pub_type

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