Functions, interactions and prognostic role of POLE: a bioinformatics analysis

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Endometrial cancer (EC) is a common gynecologic malignancy.
• The DNA Polymerase Epsilon (POLE) gene plays a critical role in DNA replication and repair.
• Understanding POLE mutations in EC is crucial for predicting disease behavior and treatment response.

Purpose of the Study:

• To characterize POLE mutations in endometrial cancer.
• To analyze the functional impact of these POLE mutations on protein structure and interactions.
• To investigate the relationship between POLE mutational status, patient survival, and prognosis in EC.

Main Methods:

• Retrieved POLE mutations in EC from the Catalogue of Somatic Mutations in Cancer database.
• Analyzed mutation impact using HOPE server and built protein-protein interaction networks with Cytoscape.
• Correlated clinical data from cBioPortal and immune cell infiltration using TIMER2.0.

Main Results:

• Identified thirty POLE mutations in EC, with p.P286R, p.V411L, and p.A456P being frequent and likely pathogenic.
• POLE interacts with proteins involved in DNA repair, cell proliferation, and platinum resistance.
• POLE-mutated EC tumors showed increased infiltration of specific immune cells (e.g., CD8+ T cells, M1 macrophages).

Conclusions:

• POLE mutations can alter DNA polymerase epsilon function and protein interactions, potentially affecting DNA repair mechanisms.
• POLE mutations may contribute to platinum resistance but can also stimulate an anti-tumor immune response.
• These findings suggest POLE mutational status is a significant factor in EC prognosis and immune microenvironment.