Related Experiment Video
Updated: Jul 4, 2025
Examination of Proteins Bound to Nascent DNA in Mammalian Cells Using BrdU-ChIP-Slot-Western Technique
Published on: January 14, 2016
The impact of selective HDAC inhibitors on the transcriptome of early mouse embryos
Ruiqi Shao1, Takayoshi Suzuki2, Mikita Suyama3
1Division of Bioinformatics, Medical Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, 812-8582, Fukuoka, Japan.
Background:
Histone acetylation, which is regulated by histone acetyltransferases (HATs) and histone deacetylases (HDACs), plays a crucial role in the control of gene expression. HDAC inhibitors (HDACi) have shown potential in cancer therapy; however, the specific roles of HDACs in early embryos remain unclear. Moreover, although some pan-HDACi have been used to maintain cellular undifferentiated states in early embryos, the specific mechanisms underlying their effects remain unknown. Thus, there remains a significant knowledge gap regarding the application of selective HDACi in early embryos.
Results:
To address this gap, we treated early embryos with two selective HDACi (MGCD0103 and T247). Subsequently, we collected and analyzed their transcriptome data at different developmental stages. Our findings unveiled a significant effect of HDACi treatment during the crucial 2-cell stage of zygotes, leading to a delay in embryonic development after T247 and an arrest at 2-cell stage after MGCD0103 administration. Furthermore, we elucidated the regulatory targets underlying this arrested embryonic development, which pinpointed the G2/M phase as the potential period of embryonic development arrest caused by MGCD0103. Moreover, our investigation provided a comprehensive profile of the biological processes that are affected by HDACi, with their main effects being predominantly localized in four aspects of zygotic gene activation (ZGA): RNA splicing, cell cycle regulation, autophagy, and transcription factor regulation. By exploring the transcriptional regulation and epigenetic features of the genes affected by HDACi, we made inferences regarding the potential main pathways via which HDACs affect gene expression in early embryos. Notably, Hdac7 exhibited a distinct response, highlighting its potential as a key player in early embryonic development.
Conclusions:
Our study conducted a comprehensive analysis of the effects of HDACi on early embryonic development at the transcriptional level. The results demonstrated that HDACi significantly affected ZGA in embryos, elucidated the distinct actions of various selective HDACi, and identified specific biological pathways and mechanisms via which these inhibitors modulated early embryonic development.
Insights
Selective histone deacetylase inhibitors (HDACi) impact early embryonic development by affecting zygotic gene activation (ZGA), cell cycle, and transcription. Hdac7 is identified as a key player.
Area of Science:
- Developmental Biology
- Epigenetics
- Molecular Biology
Background:
- Histone acetylation, regulated by HATs and HDACs, controls gene expression.
- HDAC inhibitors (HDACi) show cancer therapy potential, but their role in early embryos is unclear.
- Knowledge gaps exist regarding selective HDACi mechanisms in early embryonic development.
Purpose of the Study:
- To investigate the effects of selective HDAC inhibitors on early embryonic development.
- To elucidate the molecular mechanisms underlying HDACi-induced developmental changes.
- To identify key pathways modulated by HDACs in early embryos.
Main Methods:
- Treatment of early embryos with selective HDAC inhibitors (MGCD0103 and T247).
- Transcriptome analysis at different developmental stages.
- Analysis of biological processes including RNA splicing, cell cycle, autophagy, and transcription factor regulation.
Main Results:
- HDACi treatment significantly affected zygotic gene activation (ZGA) at the 2-cell stage.
- T247 delayed embryonic development; MGCD0103 caused arrest at the 2-cell stage, potentially during G2/M phase.
- HDACi impacted RNA splicing, cell cycle regulation, autophagy, and transcription factor regulation.
- Hdac7 showed a distinct response, suggesting a key role in early embryonic development.
Conclusions:
- HDACi significantly impact early embryonic development at the transcriptional level, affecting ZGA.
- Distinct actions of selective HDACi were elucidated, revealing specific affected pathways.
- The study identified mechanisms by which HDACs modulate gene expression in early embryos.
