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Published on: February 2, 2020
Irf2bp2a regulates liver development via stabilizing P53 protein in zebrafish
1Shanghai Institute of Hematology, State Key Laboratory of Medical Genomics, National Research Center for Translational Medicine at Shanghai, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Zebrafish irf2bp2a deficiency causes liver cell apoptosis by activating p53. This study reveals a C/ebpα-Irf2bp2a-P53 axis crucial for zebrafish liver development.
Area of Science:
- Developmental biology
- Molecular biology
- Genetics
Background:
- The role of irf2bp2a, a zebrafish ortholog of human IRF2BP2, in liver development (hepatogenesis) is not well understood.
- irf2bp2a is specifically expressed in the developing zebrafish liver during growth stages.
Purpose of the Study:
- To investigate the function of irf2bp2a during zebrafish hepatogenesis.
- To elucidate the molecular mechanisms by which irf2bp2a influences liver development.
Main Methods:
- Utilized a zebrafish irf2bp2a knockout line to study gene function.
- Analyzed hepatic cell apoptosis and p53 pathway activation.
- Investigated protein interactions, including the IRF2-MDM2 complex.
- Determined irf2bp2a as a downstream target of c/ebpα.
Main Results:
- Deficiency of irf2bp2a leads to hepatic cell apoptosis during early embryonic development.
- Aberrant p53 activation is induced in irf2bp2a-deficient zebrafish.
- In irf2bp2a-null cells, increased sequestration of MDM2 into the IRF2-MDM2 complex stabilizes p53.
- irf2bp2a is identified as a direct downstream target of the transcription factor c/ebpα.
Conclusions:
- A regulatory axis involving C/ebpα, Irf2bp2a, and P53 controls liver development in zebrafish.
- irf2bp2a plays a stage-specific role in liver organogenesis by modulating the p53 pathway.
