c-Jun as a one-way valve at the naive to primed interface
Dongwei Li1,2, Ling Luo3,4, Lin Guo3
1Key Laboratory of Biological Targeting Diagnosis, Therapy and Rehabilitation of Guangdong Higher Education Institutes, The Fifth Affiliated Hospital of Guangzhou Medical University, 190 Kaiyuan Dadao, Huangpu District, Guangzhou, 510799, China. lidongwei@gzhmu.edu.cn.
c-Jun protein acts as a one-way valve, stabilizing chromatin to maintain the primed cell state during early embryonic development. Loss of c-Jun impairs this process, facilitating easier reversion to the naïve cell state.
Area of Science:
- Cell biology
- Developmental biology
- Epigenetics
Background:
- c-Jun is a proto-oncogene transcription factor crucial in somatic cells.
- Its function in early embryonic development is not well understood.
Purpose of the Study:
- To investigate the role of c-Jun in early embryonic development and cell fate determination.
- To understand how c-Jun influences the transition between naïve and primed cell states.
Main Methods:
- Studied c-Jun's role during the naive to primed cell transition.
- Analyzed the effect of c-Jun loss on chromatin structure and enhancer activity in primed cells.
- Investigated c-Jun's impact on reprogramming primed cells to a naïve state.
Main Results:
- c-Jun is induced during the naive to primed transition, stabilizing chromatin and preventing reversion.
- Loss of c-Jun in primed cells prevents the closure of naïve-specific enhancers.
- Impaired c-Jun accelerates enhancer activation and improves reprogramming efficiency to the naïve state.
Conclusions:
- c-Jun acts as a chromatin stabilizer in primed Epiblast Stem Cells (EpiSCs).
- It maintains the epigenetic cell type state, functioning as a one-way valve for cell fate conversions.
- This highlights c-Jun's critical role in directing cell fate during early development.
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