Selenium (Se), zinc (Zn), and copper (Cu) are known to be involved in carcinogenesis and participate in the defence against reactive oxygen species (ROS). This study aimed to evaluate the clinical utility of serum Se, Zn, and Cu concentrations and plasma total antioxidant status (TAS) in the diagnosis of colorectal cancer (CRC) and colorectal adenoma (CRA) in a population of low Se and borderline Zn status. Based on clinical examination and colonoscopy/histopathology, the patients (n = 79) were divided into three groups: colorectal cancer (n = 30), colorectal adenoma (n = 19), and controls (CONTROL, n = 30). The serum Se concentration was lower in the CRC group than in the CRA group (by 9.1%, p < 0.0001) and the CONTROL group (by 7.9%, p < 0.0001). In turn, the serum Zn concentration was decreased in the CRA group (by 17.9%, p = 0.019) when compared to the CONTROL group. Plasma TAS was lower in the CRC group (by 27.8%, p = 0.017) than in the CONTROL group. In turn, the serum Zn concentration was decreased in the CRA group when compared to the CONTROL group. Plasma TAS was lower in the CRC group than in the CONTROL group. ROC (receiver operating characteristic) curve analysis revealed that the Se level was of the highest diagnostic utility for the discrimination of the CRC group from both the CRA group (area under ROC curve (AUC) 0.958, sensitivity 84.21%, specificity 100%) and the CONTROL group (AUC 0.873, sensitivity 100%, specificity 66.67%). The Zn and TAS levels were significantly accurate in the differentiation between the groups. An individualised risk of colorectal adenoma and cancer approach could comprise Se, Zn, and TAS assays in the population.

Aim of the study : The aim of this pilot study was to evaluate the plasma total antioxidant capacity (TAS) in breast cancer patients in relation to ERβ expression. Material and methods: The study group consisted of newly diagnosed consecutive female breast cancer patients (n = 41) and...

INTRODUCTION There is an inverse relationship between high‑density lipoprotein cholesterol (HDL-C) levels and the risk of atherosclerosis. OBJECTIVES The aim of the present study was to assess the oxidant-antioxidant balance in elderly people with different concentrations of HDL-C. PATIENTS AND METHODS A total of 541 people aged 60 years or older were examined, of whom 90 individuals with no acute or severe chronic disorders had their waist circumference, body mass index, percentage of body fat, and blood pressure measured. Fasting and 120‑minute glycemia was determined in an oral glucose tolerance test, following which 15 patients with type 2 diabetes were excluded. Fasting plasma levels of lipids, total antioxidant status, and thiobarbituric acid-reacting substances (TBARS), as well ast the activity of erythrocyte superoxide dismutase 1 (SOD‑1) were assessed. Based on HDL-C levels, participants were divided into the high HDL‑C group (≥40.0 mg/dl and ≥50.0 mg/dl for men and women, respectively; n = 50) and the low HDL‑C group (<40.0 mg/dl and <50.0 mg/dl for men and women, respectively; n = 25). RESULTS The groups did not differ in terms of age, blood pressure, body mass index, percentage of body fat, and glucose concentration. The high HDL‑C group had lower waist circumference (P <0.02) and lower triglyceride concentrations (P <0.00001). Increased TBARS levels (P <0.0005) was observed in the low HDL‑C group. There were no differences in SOD‑1 activity and total antioxidant status between the groups. CONCLUSIONS HDL-C levels, which are known to reflect the antiatherogenic activity of HDL, including antioxidant properties, may indicate increasing oxidative stress in healthy elderly individuals.