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A Rapid In Vivo Bioassay for Developmentally Active Enhancers
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Checks and Balances: Rpd3 Issues Executive Orders in Developmental Enhancer Regulation
Sara Martire1, Laura Banaszynski1
1Green Center for Reproductive Biology Sciences, Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
Developmental Cell
|March 2, 2017
Summary
Stem cells maintain pluripotency using poised enhancers. Researchers found that histone deacetylase Hdac1/Rpd3 keeps the erm enhancer poised in neural stem cells for later activation.
Area of Science:
- Developmental biology
- Stem cell biology
- Epigenetics
Background:
- Stem cells utilize poised enhancers for developmental gene regulation.
- These enhancers are critical for maintaining pluripotency and guiding differentiation.
- Understanding enhancer regulation is key to controlling cell fate decisions.
Purpose of the Study:
- To investigate the mechanisms maintaining poised enhancers in neural stem cells.
- To identify specific factors involved in regulating the poised state of developmental gene enhancers.
- To elucidate the role of histone deacetylases in maintaining enhancer poising.
Main Methods:
- Analysis of enhancer states in neural stem cells.
- Chromatin immunoprecipitation to assess histone modifications and transcription factor binding.
- Genetic manipulation to study the function of histone deacetylase Hdac1/Rpd3.
Main Results:
- The erm enhancer, a key developmental regulator, is maintained in a poised state in neural stem cells.
- The histone deacetylase Hdac1/Rpd3 was identified as a crucial factor in maintaining the poised state of the erm enhancer.
- Hdac1/Rpd3 activity is essential for the poised chromatin structure at the erm enhancer.
Conclusions:
- Histone deacetylase Hdac1/Rpd3 plays a critical role in maintaining poised enhancers in neural stem cells.
- This mechanism ensures developmental gene accessibility for future activation during differentiation.
- Findings provide insights into the epigenetic control of stem cell pluripotency and differentiation.
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