Rescue of the p53 tumor suppressor by a rationally designed molecule

Area of Science:

• Oncology
• Molecular Biology
• Biochemistry

Background:

• The tumor suppressor protein p53 plays a critical role in preventing cancer and mediating the efficacy of radiotherapy and chemotherapy.
• p53 functions as a stress sensor, initiating cell cycle arrest or apoptosis in response to oncogene activation, DNA damage, and hypoxia.
• Inactivation of p53 is essential for cancer cell survival, with mutations found in approximately 50% of all human tumors, making it the most frequently mutated gene in cancer.

Purpose of the Study:

• To explore the potential of small molecules in refolding and reactivating the function of mutant p53.
• To investigate the selective killing of tumor cells by restoring p53 function.
• To establish a novel therapeutic strategy for cancer treatment by targeting mutant p53.

Main Methods:

• Analysis of p53 mutations in human tumors.
• Investigation of p53 protein denaturation at body temperature due to mutations.
• Conceptualization of small molecule-based p53 reactivation therapy.

Main Results:

• Mutations in p53 frequently occur in the DNA binding domain, leading to protein denaturation and loss of function.
• Restoring p53 function is expected to induce cell death selectively in tumor cells.
• Accumulation of high levels of mutant p53 in tumors allows for targeted therapeutic intervention.

Conclusions:

• Restoring the function of the tumor suppressor p53 through small molecule intervention presents a promising therapeutic avenue for cancer.
• Targeting mutant p53, which is prevalent in many cancers, offers a strategy for selective tumor cell elimination.
• The development of drugs that can refold and reactivate p53 holds significant potential for novel cancer treatments.