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Serum vitamin-mineral profiles – association with breast cancer risk including dietary patterns and supplements use: a case-control study

Published online by Cambridge University Press:  10 June 2020

Beata Krusinska
Affiliation:
Department of Human Nutrition, University of Warmia and Mazury, Olsztyn, Poland
Lidia Wadolowska
Affiliation:
Department of Human Nutrition, University of Warmia and Mazury, Olsztyn, Poland
Malgorzata Anna Slowinska
Affiliation:
Department of Human Nutrition, University of Warmia and Mazury, Olsztyn, Poland
Maciej Biernacki
Affiliation:
Department of Surgery, University of Warmia and Mazury, Olsztyn, Poland
Marek Drozdowski
Affiliation:
Department of Laboratory Medicine, University of Warmia and Mazury, Olsztyn, Poland
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Abstract

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Breast cancer is the most diagnosed cancer among women worldwide. Studies regarding diet and blood levels of vitamins and minerals in the breast cancer aetiology are limited and the results are inconclusive. We investigated the association between serum vitamin-mineral profiles (V-MPs) and breast cancer (BC) risk with including dietary patterns (DPs) and use of supplements. This case-control study involved 420 women aged 40–79 years from north-eastern Poland, including 190 newly-diagnosed breast cancer cases. The serum concentrations of vitamins (folate, cobalamin, 25(OH) vitamin D) and minerals (iron, calcium, magnesium) were marked in 129 post-menopausal women (82 controls, 47 cases) using an immune-analyser Cobas e411 and a Cobas Integra 400plus auto-analyser (Roche Diagnostics®), respectively. A posteriori V-MPs were derived with a Principal Component Analysis (PCA). Three PCA-driven DPs: ‘Non-Healthy’, ‘Prudent’, and ‘Margarine and Sweetened Dairy’ were described previously. A logistic regression analysis was performed. The odds ratios (ORs) and 95% confidence interval (95% CI) were calculated. Two serum V-MPs were identified. The ‘Folate-Cobalamin-Vitamin D’ profile was loaded heavily by the folate (factor loading 0.82), cobalamin (0.81) and vitamin D (0.49). The ‘Iron-Calcium’ profile was loaded heavily by the iron (0.81) and calcium (0.77). The ‘Magnesium-vitamin D’ profile was loaded heavily by the magnesium (0.92) and vitamin D (0.39). The risk of BC was lower by 88% (OR: 0.12; 95%Cl: 0.02–0.88; p < 0.05) in the upper tertile of the serum ‘Iron-Calcium’ profile compared to the bottom tertile. The risk of BC was lower by 67% (OR: 0.33; 95%Cl: 0.11–0.97; p < 0.05) at the level of serum 25(OH) vitamin D ≥ 24.6 ng/mL and lower by 68% (OR: 0.32; 95%Cl: 0.11–0.91; p < 0.05) at the level of serum calcium ≥ 9.6 mg/dL. There was the inverse association of the serum ‘Magnesium-Vitamin D’ profile with the risk of BC, which disappeared after adjustment for DPs. No significant association between BC risk and the serum ‘Folate-Cobalamin-Vitamin D’ profile and also folate, cobalamin, iron or magnesium considered separately was revealed. These findings highlight that the higher-adequate serum concentrations of both iron and calcium as well as close-to-adequate concentrations of calcium and vitamin D considered separately may protect against breast cancer among postmenopausal women, independently of dietary patterns and use of supplements. Therefore, women should be screened for blood concentrations of multiple vitamins and minerals in the breast cancer prevention.

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