Reactivation of mutant p53: molecular mechanisms and therapeutic potential

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• The p53 tumor suppressor gene is frequently mutated in cancer, primarily through missense point mutations in its DNA-binding core domain.
• These mutations distort the protein's structure, impairing its ability to bind DNA and regulate target genes, which are crucial for preventing tumor formation.
• Despite mutations, the unfolded state of the mutant p53 core domain is not irreversibly damaged, and mutant p53 is overexpressed in many tumors.

Purpose of the Study:

• To explore mutant p53 as a therapeutic target for cancer treatment.
• To investigate strategies for reactivating the tumor-suppressive function of mutant p53.
• To assess the potential for clinical applications of mutant p53 reactivation therapies.

Main Methods:

• Structural studies to understand mutant p53 core domain folding.
• Development of therapeutic strategies targeting mutant p53.
• In vitro and in vivo testing of mutant p53 reactivation agents.

Main Results:

• Mutant p53 reactivation strategies, including peptides and small molecules, have been developed.
• These strategies restore the active conformation and DNA-binding ability of mutant p53.
• Restored p53 function leads to p53-dependent apoptosis and suppression of tumor cell growth in preclinical models.

Conclusions:

• Mutant p53 is a viable and promising target for novel cancer therapies.
• Reactivating mutant p53 can restore tumor suppressor functions, leading to tumor cell elimination.
• These findings support the clinical development of mutant p53 reactivation strategies for cancer treatment.