Abstract
The tet methylcytosine dioxygenase 2 (TET2) enzyme catalyzes the conversion of the modified DNA base 5-methylcytosine to 5-hydroxymethylcytosine. TET2 is frequently mutated or dysregulated in multiple human cancers, and loss of TET2 is associated with changes in DNA methylation patterns. Here, using newly developed TET2-specific antibodies and the estrogen response as a model system for studying the regulation of gene expression, we demonstrate that endogenous TET2 occupies active enhancers and facilitates the proper recruitment of estrogen receptor α (ERα). Knockout of TET2 by CRISPR-CAS9 leads to a global increase of DNA methylation at enhancers, resulting in attenuation of the estrogen response. We further identified a positive feedback loop between TET2 and ER?, which further requires MLL3 COMPASS at these enhancers. Together, this study reveals an epigenetic axis coordinating a transcriptional program through enhancer activation via DNA demethylation.
Original language | English (US) |
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Article number | eaau6986 |
Journal | Science Advances |
Volume | 4 |
Issue number | 11 |
DOIs | |
State | Published - Nov 7 2018 |
Funding
This work was supported by the Training Program in Signal Transduction and Cancer (grant T32 CA070085 to L.W.); NIH/NCI training grant T32CA070085, Alex's Lemonade Stand Foundation, and Northwestern Mutual (to Z.Z.); NIH grant R50CA211428 (to E.R.S.); and NIH grant K08HL128867 and the Francis Family Foundation's Parker B. Francis Research Opportunity Award (to B.D.S.). Studies in the Shilatifard laboratory related to COMPASS are supported by the NCI's Outstanding Investigator Award R35CA197569 to A.S.
ASJC Scopus subject areas
- General