Blood selenium concentrations and glutathione peroxidase activities in patients with breast cancer and with advanced gastrointestinal cancer.
Recent prospective epidemiological studies have shown an association between a low prediagnostic serum selenium (Se) concentration and the risk of cancer. Se concentrations in whole blood and plasma, and the activity of red cell and plasma glutathione peroxidase (GSH-Px) were measured in patients with breast cancer, gastric cancer and colorectal cancer. The observed whole blood and plasma Se concentrations of healthy persons were 99.5 and 78.5 micrograms/L, respectively. Red cell and plasma GSH-Px activities of this group were: 21.0 U/g Hb and 256 U/L plasma. In all investigated cancer patients significantly lower whole blood and plasma Se concentrations, and significantly lower red cell and plasma GSH-Px activities were found, as compared with the values of healthy controls. Low Se concentrations of blood components may be indicative of increased cancer risk.
Pawłowicz
Z
Z
Department of Surgery, Clinical Hospital, Bydgoszcz, Poland.
Zachara
B A
BA
Trafikowska
U
U
Maciag
A
A
Marchaluk
E
E
Nowicki
A
A
D000328:Adult; D000368:Aged; D001943:Breast Neoplasms / Q000097:blood*; D015179:Colorectal Neoplasms / Q000097:blood*; D004912:Erythrocytes / Q000201:enzymology; D005260:Female; D005979:Glutathione Peroxidase / Q000097:blood*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012643:Selenium / Q000097:blood*; D013274:Stomach Neoplasms / Q000097:blood*
D005979:Glutathione Peroxidase; D012643:Selenium