A Glance of p53 Functions in Brain Development, Neural Stem Cells, and Brain Cancer
Yuqing Xiong1, Yun Zhang2, Shunbin Xiong3
1Vagelos College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA.
Abstract:
p53 is one of the most intensively studied tumor suppressors. It transcriptionally regulates a broad range of genes to modulate a series of cellular events, including DNA damage repair, cell cycle arrest, senescence, apoptosis, ferroptosis, autophagy, and metabolic remodeling, which are fundamental for both development and cancer. This review discusses the role of p53 in brain development, neural stem cell regulation and the mechanisms of inactivating p53 in gliomas. p53 null or p53 mutant mice show female biased exencephaly, potentially due to X chromosome inactivation failure and/or hormone-related gene expression. Oxidative cellular status, increased PI3K/Akt signaling, elevated ID1, and metabolism are all implicated in p53-loss induced neurogenesis. However, p53 has also been shown to promote neuronal differentiation. In addition, p53 mutations are frequently identified in brain tumors, especially glioblastomas. Mechanisms underlying p53 inactivation in brain tumor cells include disruption of p53 protein stability, gene expression and transactivation potential as well as p53 gene loss or mutation. Loss of p53 function and gain-of-function of mutant p53 are both implicated in brain development and tumor genesis. Further understanding of the role of p53 in the brain may provide therapeutic insights for brain developmental syndromes and cancer.
Insights
The tumor suppressor p53 impacts brain development and neural stem cell regulation. Understanding p53 inactivation in gliomas offers potential therapeutic insights for brain cancers and developmental disorders.
Area of Science:
- Neuroscience
- Oncology
- Molecular Biology
Background:
- p53 is a critical tumor suppressor regulating genes involved in DNA repair, cell cycle, and apoptosis.
- Its functions are fundamental in both normal development and cancer progression.
- Dysregulation of p53 is implicated in various diseases, including brain tumors.
Purpose of the Study:
- To review the multifaceted role of p53 in brain development and neural stem cell regulation.
- To elucidate mechanisms of p53 inactivation in gliomas.
- To explore therapeutic implications of p53 research for brain disorders.
Main Methods:
- Literature review of studies on p53 function in the brain.
- Analysis of p53's role in neurogenesis and neuronal differentiation.
- Examination of p53 inactivation pathways in glioma development.
Main Results:
- p53 deficiency in mice leads to female-biased exencephaly, linked to X chromosome inactivation and hormonal factors.
- p53 loss influences neurogenesis via oxidative stress, PI3K/Akt signaling, and metabolic changes.
- p53 mutations are prevalent in gliomas, with inactivation occurring through various genetic and protein-level mechanisms.
Conclusions:
- Both loss-of-function and gain-of-function mutations of p53 play roles in brain development and tumorigenesis.
- Further research into p53's brain functions may yield novel therapeutic strategies for brain developmental syndromes and cancers.
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