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Updated: Jul 13, 2026

Prediction and Validation of Gene Regulatory Elements Activated During Retinoic Acid Induced Embryonic Stem Cell Differentiation
Published on: June 21, 2016
RhoB is epigenetically regulated in an age- and tissue-specific manner
Young Soo Yoon1, Jung Ha Choo1, Taekyung Yoo1
1Department of Biological Sciences, Korea Advanced Institute of Science and Technology, 335 Gwahangno, Yuseoung-gu, Daejeon 305-701, South Korea.
Aging epigenetically alters RhoB gene transcription in mice through histone modifications, not DNA methylation. This tissue-specific regulation impacts RhoB
Area of Science:
- Molecular Biology
- Epigenetics
- Aging Research
Background:
- RhoB GTPase is crucial for actin cytoskeleton organization, cell transformation, and stress signaling.
- Understanding epigenetic regulation of RhoB during aging is vital for comprehending age-related cellular changes.
Purpose of the Study:
- To investigate the epigenetic mechanisms controlling RhoB gene transcription during the aging process in mice.
- To determine the role of DNA methylation and histone modifications in age-dependent RhoB regulation.
Main Methods:
- Analysis of RhoB mRNA levels across various mouse tissues and ages.
- Bisulfite sequencing to assess CpG methylation in the RhoB promoter region.
- Chromatin immunoprecipitation (ChIP) assays to evaluate histone modifications (acetylation, trimethylation, dimethylation) and HP1beta binding at the RhoB promoter.
Main Results:
- CpG methylation patterns in the RhoB promoter remained unchanged in skeletal muscle and lung during aging.
- Histone H3 and H4 acetylation levels decreased in a tissue-specific manner with age, correlated with HDAC1 binding.
- Histone H3 lysine 9 trimethylation and HP1beta deposition increased, while H3 lysine 4 dimethylation decreased at the RhoB promoter during aging.
Conclusions:
- Mouse RhoB transcription is epigenetically regulated in a tissue-specific manner during aging.
- Histone modifications, not CpG methylation, are the primary epigenetic drivers of age-dependent RhoB regulation.
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