p53 as a hub in cellular redox regulation and therapeutic target in cancer

Area of Science:

• Molecular Biology
• Cancer Biology
• Biochemistry

Background:

• The TP53 gene encodes a tumor suppressor protein (p53) crucial for regulating cell growth and death.
• p53 function, including DNA binding and transcriptional activation, is modulated by post-translational modifications and cellular redox state.
• Mutations in TP53 are common in human cancers, often resulting in altered p53 proteins with gain-of-function activities.

Purpose of the Study:

• To investigate the interplay between mutant p53 and cellular redox homeostasis.
• To explore novel therapeutic strategies targeting both mutant p53 and cellular redox balance for cancer treatment.

Main Methods:

• Analysis of TP53 gene mutations in human tumors.
• Investigation of mutant p53's influence on cellular redox state, including interactions with transcription factors like Nrf2.
• Evaluation of novel compounds designed to refold and reactivate mutant p53 by targeting cysteine residues and cellular thiols.

Main Results:

• Mutant p53 proteins can disrupt cellular redox homeostasis through various mechanisms, including Nrf2 pathway modulation.
• The DNA-binding core domain of p53 contains critical cysteine residues essential for its structure and function.
• Novel compounds targeting mutant p53 cysteine residues also interact with cellular redox components like glutathione.

Conclusions:

• Mutant p53 significantly impacts cellular redox balance, contributing to cancer progression.
• Dual targeting of mutant p53 and redox homeostasis presents a promising therapeutic approach for cancer.
• Further research into these compounds could lead to more effective cancer therapies.