Targeting p53 pathways: mechanisms, structures, and advances in therapy

Area of Science:

• Oncology
• Molecular Biology
• Cancer Genetics

Background:

• The TP53 gene encodes the p53 protein, a critical tumor suppressor known as the "guardian of the genome" due to its roles in cell cycle regulation, apoptosis, and genomic stability.
• p53 influences diverse cellular processes including metabolism, ferroptosis, and autophagy, all contributing to tumor suppression.
• TP53 mutations are prevalent in human cancers, not only inactivating its tumor-suppressive functions but also potentially conferring oncogenic properties to mutant p53 proteins.

Approach:

• This systematic review examines the multifaceted molecular mechanisms of the p53 signaling pathway.
• It analyzes the impact of TP53 mutations on tumor progression and discusses the structural characteristics of p53 and its inactivation.
• The review synthesizes current research on p53-targeted therapies, including progress and clinical development challenges.

Key Points:

• p53 is a key transcription factor regulating fundamental cellular processes vital for tumor suppression.
• Mutations in TP53 are common in cancer, leading to loss of function and potential oncogenic gain-of-function.
• Targeting the frequently mutated TP53 gene presents a significant challenge in oncology drug development.

Conclusions:

• Despite its critical role and frequent mutation in cancer, p53 has historically been considered an "undruggable" target.
• Understanding p53's diverse functions and mutation-specific effects is crucial for advancing p53-targeted cancer therapies.
• Overcoming the challenges in p53-targeted drug development holds promise for novel anti-cancer strategies.