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Isolation and Cultivation of Neural Progenitors Followed by Chromatin-Immunoprecipitation of Histone 3 Lysine 79 Dimethylation Mark
Published on: January 26, 2018
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DOT1L-mediated H3K79me2 modification critically regulates gene expression during cardiomyocyte differentiation
P Cattaneo1,2,3, P Kunderfranco1, C Greco1
1Laboratory of Cardiovascular Research, Humanitas Clinical and Research Center, Rozzano, Milan 20089, Italy.
Cell Death and Differentiation
|December 20, 2014
Summary
Epigenetic enzymes regulate heart cell development. Disruptor of telomeric silencing 1-like (DOT1L) and its H3K79me2 mark are crucial for cardiomyogenesis, guiding gene expression during heart formation.
Area of Science:
- Epigenetics
- Molecular Biology
- Developmental Biology
Background:
- Epigenetic modifications, including histone methylation, are vital for cell differentiation.
- Distinct histone methylation patterns are linked to gene expression during cardiac differentiation.
- The specific enzymes and genes involved in these cardiac epigenetic processes are not fully understood.
Purpose of the Study:
- To identify epigenetic enzymes involved in cardiomyogenesis.
- To analyze the role of these enzymes in gene expression during cardiomyocyte differentiation and maturation.
- To investigate the function of histone methylation in heart development.
Main Methods:
- Gene expression screening of 85 epigenetic enzyme genes in mouse cardiomyocytes (CMs).
- Analysis of H3 lysine 79 di-methylation (H3K79me2) patterns during CM differentiation.
- Genome-wide chromatin-immunoprecipitation DNA-sequencing (ChIP-seq) to identify H3K79me2 enrichment.
- Knockdown of Dot1L to assess its effect on gene expression.
Main Results:
- Disruptor of telomeric silencing 1-like (DOT1L) was highly expressed and correlated with H3K79me2 patterns in CMs.
- H3K79me2 marks were enriched at genes active during cardiac differentiation.
- Dot1L knockdown altered the expression of H3K79me2-enriched genes.
Conclusions:
- Histone methylation, specifically DOT1L-mediated H3K79me2, plays a critical role in cardiomyogenesis.
- DOT1L-mediated H3K79me2 defines a specific transcriptional landscape essential for heart development.
- This study elucidates a key epigenetic mechanism driving cardiac differentiation.
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