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Updated: Jun 4, 2026
14:57
Yeast As a Chassis for Developing Functional Assays to Study Human P53
Published on: August 4, 2019
Roles of HAUSP-mediated p53 regulation in central nervous system development
1Institute for Cancer Genetics, Columbia University, New York, NY 10032, USA.
Cell Death and Differentiation
|February 26, 2011
Summary
The deubiquitinase HAUSP is essential for brain development. Its absence causes neonatal lethality due to p53-mediated apoptosis, though p53-independent functions also contribute.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- The deubiquitinase HAUSP (USP7) regulates the p53-Mdm2 pathway.
- Previous studies showed HAUSP knockout leads to embryonic lethality.
Purpose of the Study:
- To investigate the role of HAUSP in brain development.
- To understand the impact of HAUSP deficiency in neural cells.
Main Methods:
- Generated mice with HAUSP specifically deleted in the brain.
- Analyzed brain development, apoptosis, and p53 levels in mutant mice.
- Examined the effects of p53 and Mdm4 inactivation in HAUSP-mutant mice.
Main Results:
- HAUSP deletion in neural cells caused neonatal lethality and brain hypoplasia.
- Increased p53 levels and apoptosis were observed in HAUSP-deficient brains.
- Restoring p53 function partially rescued brain development and survival, but not completely.
Conclusions:
- HAUSP is crucial for brain development via p53 regulation.
- Both p53-dependent and independent functions of HAUSP contribute to neonatal lethality.
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