Non-Canonical Cell Death Induced by p53

Area of Science:

• Cell Biology
• Molecular Biology
• Oncology

Background:

• Programmed cell death is crucial for multicellular organism homeostasis.
• Apoptosis is the primary caspase-dependent cell death pathway.
• Non-apoptotic programmed cell death mechanisms are increasingly recognized.

Purpose of the Study:

• To review the multifaceted roles of the p53 tumor suppressor in diverse non-canonical cell death pathways.
• To elucidate the mechanisms by which p53 influences non-apoptotic cell death.
• To highlight the context-dependent functions of p53 in cell fate decisions.

Main Methods:

• Literature review of programmed cell death mechanisms.
• Analysis of p53's transcriptional and direct regulatory roles.
• Synthesis of findings across various non-canonical cell death types.

Main Results:

• p53 modulates caspase-independent apoptosis (CIA), ferroptosis, necroptosis, autophagic cell death, mitotic catastrophe, paraptosis, and pyroptosis.
• p53's influence is exerted through downstream target regulation and direct protein interactions.
• p53's function in these pathways is specific to cell type and tissue context.

Conclusions:

• p53 is a key regulator of multiple non-canonical programmed cell death pathways.
• Understanding p53's diverse roles is critical for cancer research and therapy.
• p53 also plays a role in efferocytosis, the clearance of dying cells.