P53: A Guardian of Immunity Becomes Its Saboteur through Mutation

Area of Science:

• Oncology
• Immunology
• Molecular Biology

Background:

• The tumor suppressor protein p53 (also known as p53) is crucial for controlling cancer development and is increasingly recognized for its role in immunity.
• Wild-type p53 (wt p53) regulates inflammation and both innate and adaptive immune responses.
• Mutations in p53 are prevalent in human cancers and are linked to immune dysfunction.

Purpose of the Study:

• To review the impact of oncogenic drivers, specifically mutant p53, on cancer immunity.
• To discuss the neomorphic gain-of-functions (GOFs) of mutant p53 that subvert immune function.
• To explore mutant p53 as a potential target for cancer immunotherapy.

Main Methods:

• Literature review focusing on the roles of wild-type and mutant p53 in cancer immunity.
• Analysis of mutant p53's impact on tumor microenvironment, inflammation, and immune signaling pathways (e.g., toll-like receptor signaling).
• Discussion of immune evasion mechanisms mediated by mutant p53.

Main Results:

• Mutant p53 cripples wt p53's immune functions and promotes tumorigenesis, metastasis, and invasion.
• Mutant p53 alters the tumor microenvironment to foster immune dysfunction.
• Mutant p53 disrupts innate immunity via toll-like receptor pathways and promotes immune privilege by subverting cell-mediated immunity.

Conclusions:

• Mutant p53 plays a significant role in modulating cancer immunity, often promoting immune evasion.
• Targeting mutant p53's immune GOFs presents a potential strategy for cancer immunotherapy.
• Existing therapies may be enhanced by considering the p53 mutational status of cancers.