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Abstract
Histone acetylation, regulated by two antagonistic enzymes — histone acetyltransferases (HATs) and histone deacetylases (HDACs) — results in transcriptional changes and also plays a critical role in cardiac development and disease. A new study shows that overexpression of the atypical transcriptional corepressor homeodomain-only protein (Hop) causes cardiac hypertrophy via recruitment of a class I HDAC. In contrast to the body of work on transcriptional mechanisms that drive cardiac hypertrophy, including class II HDACs, this report elucidates a novel growth-suppressing transcriptional pathway in cardiac muscle that opposes hypertrophic growth.
Authors
Yasuo Hamamori, Michael D. Schneider
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