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Expression and activity of superoxide dismutase isoenzymes in colorectal cancer

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Skrzycki M., Majewska M., Podsiad M., Czeczot H.

Acta Biochimica Polonica

2009

vol. 56

issue 4

663-670

The aim of the study was an evaluation of changes in protein level and activity of SOD isoenzymes, and the participation of AP-1 and NF-κB in subsequent stages of colorectal cancer development. Studies were conducted on 65 colorectal cancers. Controls were unchanged colon regions. Activity of SOD isoenzymes, lipid peroxidation level (TBARS), and protein level of SOD1, SOD2, AP-1 and NF-κB were determined. We found that the protein level and activity of SOD isoenzymes and protein level of AP-1 and NF-κB change in subsequent stages of clinical advancement of colorectal cancer, according to UICC (I-IV), and in grades of tumor cells differentiation (G1-G3). These results indicate adaptation of colorectal cancer cells to oxidative stress, and show that the observed changes of SOD activity and protein level depend on gradual progression of colorectal cancer, and suggest an impairment of processes regulated by AP-1 and NF-κB which are critical for tumor progression (proliferation, differentiation and apoptosis).

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1 Acta Biochimica Polonica

1 2009

1 Czeczot H.

1 Majewska M.

1 Podsiad M.

1 Skrzycki M.

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Expression and activity of superoxide dismutase isoenzymes in colorectal cancer