[p53-regulating pathways as targets for personalized cancer therapy]

Area of Science:

• Molecular Biology
• Cell Biology
• Cancer Biology

Context:

• The tumor suppressor p53 is a transcription factor activated by cellular stress.
• p53 regulates genes involved in cell cycle checkpoints and apoptosis.
• The cellular response to DNA damage depends on the severity of the lesion.

Purpose:

• To summarize recent advances in understanding the molecular mechanisms controlling p53 signaling outcomes.
• To explore how the severity of genotoxic stress influences the choice between cell cycle arrest and apoptosis.
• To provide an outlook on therapeutic strategies targeting p53.

Summary:

• p53's role in cell cycle arrest versus apoptosis is critical in DNA damage response.
• The decision between arrest and apoptosis is influenced by the degree of genotoxic stress.
• p53-driven apoptosis is desired in cancer therapy, while cell cycle arrest can lead to resistance.

Impact:

• Clarifies molecular mechanisms governing p53's dual role in DNA damage response.
• Highlights the importance of p53's decision-making in chemotherapy efficacy.
• Suggests potential for pharmacological interventions to enhance anti-cancer therapy by modulating p53 activity.