Abstract:
:Epigenetic reprogramming is a critical process of pathological gene induction during cardiac hypertrophy and remodeling, but the underlying regulatory mechanisms remain to be elucidated. Here we identified a heart-enriched long noncoding (lnc)RNA, named cardiac-hypertrophy-associated epigenetic regulator (Chaer), which is necessary for the development of cardiac hypertrophy. Mechanistically, Chaer directly interacts with the catalytic subunit of polycomb repressor complex 2 (PRC2). This interaction, which is mediated by a 66-mer motif in Chaer, interferes with PRC2 targeting to genomic loci, thereby inhibiting histone H3 lysine 27 methylation at the promoter regions of genes involved in cardiac hypertrophy. The interaction between Chaer and PRC2 is transiently induced after hormone or stress stimulation in a process involving mammalian target of rapamycin complex 1, and this interaction is a prerequisite for epigenetic reprogramming and induction of genes involved in hypertrophy. Inhibition of Chaer expression in the heart before, but not after, the onset of pressure overload substantially attenuates cardiac hypertrophy and dysfunction. Our study reveals that stress-induced pathological gene activation in the heart requires a previously uncharacterized lncRNA-dependent epigenetic checkpoint.
journal_name
Nat Medjournal_title
Nature medicineauthors
Wang Z,Zhang XJ,Ji YX,Zhang P,Deng KQ,Gong J,Ren S,Wang X,Chen I,Wang H,Gao C,Yokota T,Ang YS,Li S,Cass A,Vondriska TM,Li G,Deb A,Srivastava D,Yang HT,Xiao X,Li H,Wang Ydoi
10.1038/nm.4179subject
Has Abstractpub_date
2016-10-01 00:00:00pages
1131-1139issue
10eissn
1078-8956issn
1546-170Xpii
nm.4179journal_volume
22pub_type
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