Abstract
Gastric and colorectal cancers are two obesity-related cancers. Irisin is a dipo-myokine with an important role in the body's energy homeostasis. Oxidative Stress has a crucial role in tumorigenesis. Therefore, this study aims to investigate the association of circulating irisin with oxidative stress in gastric and colorectal cancer patients. A case-control study involving 62 gastric and colorectal cancers and 22 healthy individuals was carried out. Serum irisin and Total Antioxidant Capacity were measured by sandwich enzyme-linked immunosorbed assay (ELIZA) kits. Total Oxidative Stress (TOS) was measured using colorimetric methods and oxidative stress index (OSI) was also calculated. Serum irisin decreased significantly (p<0.0001) in gastric and colorectal cancer cases compared to healthy individuals. The TOS and OSI levels increased significantly (p<0.0001) in gastric and colorectal cancer cases compared to healthy individuals. No significant correlation was found in terms of irisin, TOS, TAC, and OSI in gastric and colorectal cancer cases and control groups. Circulating irisin decreases and oxidative stress increases in gastric and colorectal cancers. There is no correlation between irisin and oxidative stress. The mechanism by which irisin is associated with oxidative stress is still not clear.
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