Dual Role of p73 in Cancer Microenvironment and DNA Damage Response

Area of Science:

• Oncology
• Molecular Biology
• Cancer Research

Background:

• The p53 tumor suppressor is frequently mutated in human cancers.
• The p53 family member p73 is often overexpressed in cancers and can perform some p53 functions.
• p73 isoforms play complex roles in cancer, acting as both a tumor suppressor and an oncoprotein.

Purpose of the Study:

• To elucidate the dual role of p73 in cancer progression.
• To understand how p73 influences the tumor microenvironment and immune cells.
• To explore p73's impact on epithelial-mesenchymal transition, metastasis, and angiogenesis.

Main Methods:

• Analysis of p73's function in regulating apoptosis.
• Investigation of p73's role in epithelial-mesenchymal transition and metastasis.
• Examination of p73's modulation of tumor microenvironment components including M2 macrophages, Th2 T-cells, and angiogenesis.

Main Results:

• p73 can repress epithelial-mesenchymal transition and metastasis, suggesting a tumor-suppressive function.
• p73 can promote tumor growth by influencing crosstalk between cancer and immune cells.
• p73 is implicated in M2 macrophage polarization, Th2 T-cell differentiation, and angiogenesis, contributing to an immunosuppressive tumor microenvironment.

Conclusions:

• p73 exhibits a dual role in cancer, acting as a tumor suppressor by inducing apoptosis.
• p73 can function as an oncoprotein by promoting an immunosuppressive tumor microenvironment and immune cell differentiation.
• Targeting p73's distinct functions may offer novel therapeutic strategies for cancer treatment.