Cancer Stemness: p53 at the Wheel.

Area of Science:

• Molecular Biology
• Cancer Biology
• Stem Cell Biology

Background:

• The tumor suppressor p53 is crucial for maintaining stem cell homeostasis by regulating self-renewal and differentiation.
• p53 inactivation disrupts this balance, promoting pluripotency and somatic cell reprogramming.
• Oncogenic gain-of-function (GOF) mutations in TP53 are increasingly recognized for enhancing cancer stemness.

Purpose of the Study:

• To review the role of wild-type p53 in normal stem cell pluripotency.
• To elucidate mechanisms by which p53 mutations (inactivating and GOF) promote cancer stemness.
• To explore the link between mutant p53-driven stemness and other GOF properties like EMT and chemoresistance.

Main Methods:

• Literature review and synthesis of existing research on p53, stemness, and cancer.
• Analysis of non-coding RNA-mediated epigenetic regulation in mutant p53-driven stemness.
• Examination of the association between cancer stemness and epithelial-to-mesenchymal transition (EMT) and chemoresistance.

Main Results:

• Wild-type p53 balances stem cell self-renewal and differentiation for tissue homeostasis.
• p53 inactivation and GOF mutations promote stemness in cancer cells.
• Mutant p53-driven stemness involves epigenetic regulation via non-coding RNAs and is linked to EMT and chemoresistance.

Conclusions:

• Mutant p53 actively promotes cancer stemness, contributing to tumor maintenance, progression, and therapeutic resistance.
• Targeting cancer stem-like cells in mutant p53 tumors holds potential for improving treatment efficacy.
• Understanding the interplay between mutant p53, stemness, and other oncogenic properties is critical for developing novel cancer therapies.