Evaluation of oxidative stress in colorectal cancer patients.
OBJECTIVE
To evaluate the oxidative stress in patients with colorectal cancer and to investigate the relationship between oxidative stress and colorectal cancer.


METHODS
Seventy-six subjects were divided into two groups (36 colorectal cancer patients as the study group and 40 normal healthy individuals as the control group). Their protein oxidation, DNA damage, lipid peroxidation and antioxidants, vitamin C, vitamin E, glutathione (GSH), and antioxidative enzymes in serum were detected.


RESULTS
The levels of protein carbonyl and advanced oxidation protein products (AOPP) were significantly higher in the study group than in the control group (P<0.01). Serum 8-OHdG was significantly increased in the study group compared to the control group (P<0.01). However, the mean serum level of MDA and conjugated diene was lower in the study group than in the control group (P<0.01). The activity of antioxidative enzymes was significantly decreased in the study group compared to the control group (P<0.01). Serum vitamins C and E concentrations were significantly reduced in the study group compared to the control group (P<0.01).


CONCLUSIONS
Colorectal cancer is associated with oxidative stress, and assessment of oxidative stress and given antioxidants is important for the treatment and prevention of colorectal cancer.
First Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang, China.
Dong
D
Chang
Fan
F
Wang
Ya-Shuang
YS
Zhao
Hong-Zhi
HZ
Pan
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015179:Colorectal Neoplasms / Q000378:metabolism*; D004249:DNA Damage; D005260:Female; D006801:Humans; D015227:Lipid Peroxidation; D008297:Male; D008875:Middle Aged; D018384:Oxidative Stress