Citation
Title: Reduced Manganese, Selenium and Zinc in Newly Diagnosed Breast Cancer Subjects in South Western Nigeria
Authors: 1Dolapo P. Oparinde, 2Adetunji S. Oguntola, 3Adeniran S. Atiba*, Olabamiji A Ajose,4 Adekemi A Adeoye5
Abstract
Background: Micronutrients, dyslipidemia and body mass index (BMI) have been established to be risk factors for breast cancer development.
Aim: To determine the influence of breast cancer on serum Manganese (Mn), Selenium (Se) and Zinc (Zn) level as well as its association with plasma lipid profile.
Materials and Methods: Fasting plasma Total-cholesterol (T-Chol), HDL-cholesterol (HDL-Chol), LDL-cholesterol (LDL-Chol), Triglyceride (Tg) and serum Mn, Se and Zn levels were determined in 50 newly diagnosed breast cancer subjects (NDBC) and 50 age matched mammography screened controls, using commercial kits from Randox laboratory and Atomic Absorption Spectrophotometric methods respectively. BMI was calculated using Weight (Kg)/Height (m2). Data obtained were subjected to statistical analysis using SPSS statistical package version 17.0.
Results: BMI, T-Chol, LDL-Chol and Tg were significantly elevated in NDBC subjects compared with controls, 28.40±4.64kg/m2, 6.19±1.16 (mmol/L), 4.48±1.38 (mmol/L) and 2.62±0.03 (mmol/L) vs 21.71±2.09kg/m2, 4.3±1.17 (mmol/L), 2.06±1.17 (mmol/L) and 2.01±0.19 (mmol/L), p<0.01 respectively. On the contrary, HDL-Chol and serum Mn, Se, and Zinc were significantly lower in NDBC subjects, 0.51±0.30 (mmol/L), 2.18±1.10 µg/dl, 3.76±1.96 µg/dl and 41.96µg/dl vs 1.27±0.11 (mmol/L), 9.38±3.02 µg/dl, 17.24±6.35 µg/dl and 106.18±28.06µg/dl, p<0.01 respectively. BMI, plasma T-Chol, LDL-Chol and Tg demonstrates significant negative correlations with HDL-Chol, Mn, Se, and Zinc, p <0.01 respectively).
Conclusion: A decrease in antioxidative trace metal level (Mn, Se,and Zn) exist in Nigerian subjects with NDBC. Moreover, in view of the significant negative correlations, dyslipidemia and increased BMI may be a strong pointer to reduced antioxidative trace metals in NDBC subjects.
Key words: Manganese, Selenium, Zinc, Breast-cancer, Nigerians.