Aim: To investigate the expression of interleukin-6 (IL6) in colon cancer tissue, and to examine if the risk of relapse is influenced by IL6 expression.
Materials And Methods: Fresh-frozen biopsies from tumor and normal adjacent tissues were taken from patients with colon cancer during surgery and stored at -80 °C. mRNA expression for interleukin-6 was evaluated with reverse transcription real time quantitative polymerase chain reaction. Survival analyses were carried-out using a Cox competing risk regression model.
Results: IL6 mRNA was significantly more highly expressed in tumor tissue compared to normal adjacent tissue (p<0.001). We found no significant association with regard to IL6 expression and histological differentiation or cancer stage. We found a significant association between high IL6 expression and risk of relapse (Hazard Ratio=2.23, 95% CI=1.10-4.53; p<0.05), also when adjusted for clinicopathological characteristics (Hazard Ratio=2.16, 95% CI=1.07-4.40; p<0.05).
Conclusion: Interleukin-6 is up-regulated in colon cancer tissue at the transcriptional level and is significantly associated with increased risk of relapse.
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Proc Natl Acad Sci U S A
January 2025
Center for Mitochondrial and Epigenomic Medicine, The Children's Hospital of Philadelphia, Philadelphia, PA 19104.
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Department of Community Medicine, University of Tromsø - The Arctic University of Norway, 9037 Tromsø, Norway.
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