POLQ immunostaining behaves as a prognostic factor for pancreatic carcinoma

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• DNA polymerase theta (POLQ) is crucial for DNA repair via the Theta Mediated End Joining (TMEJ) pathway.
• POLQ overexpression is linked to cancer progression and poor prognosis in various cancers.
• The prognostic value of POLQ in pancreatic cancer has not been previously investigated.

Purpose of the Study:

• To investigate the utility of POLQ H-score as a prognostic biomarker in pancreatic cancer.
• To analyze the correlation between POLQ gene expression and patient survival outcomes.

Main Methods:

• Evaluated POLQ mRNA levels using the GEPIA web tool with TCGA and GTEx data.
• Assessed POLQ protein expression via immunohistochemistry (IHC) in 152 biliopancreatic cancer specimens.
• Correlated survival data with POLQ expression using Kaplan-Meier curves and Cox regression analysis.

Main Results:

• GEPIA analysis revealed significant associations between POLQ mRNA levels and both Disease Free Survival (DFS) and Overall Survival (OS).
• Immunohistochemistry showed that POLQ H-score was significantly linked to OS in Kaplan-Meier and Cox regression analyses.
• Higher POLQ expression correlated with poorer survival outcomes in pancreatic cancer patients.

Conclusions:

• POLQ serves as an independent prognostic factor in pancreatic cancer.
• Both gene expression analysis (GEPIA) and protein level assessment (IHC) support POLQ's role as a prognostic indicator.
• POLQ is a potential biomarker for predicting patient prognosis in pancreatic cancer.