MnSOD and CAT polymorphisms modulate the effect of the Mediterranean diet on breast cancer risk among Greek-Cypriot women

Maria G. Kakkoura, Christiana A. Demetriou, Maria A. Loizidou, Giorgos Loucaides, Ioanna Neophytou, Simon Malas, Kyriacos Kyriacou, Andreas Hadjisavvas

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15 Citations (Scopus)

Abstract

Purpose: Oxidative stress arises due to a cellular imbalance in oxidants and antioxidants and/or due to an altered activity of antioxidant enzymes, caused by SNPs. Oxidative stress increases susceptibility to breast cancer (BC) risk, and we previously showed that the Mediterranean diet (MD), which is rich in antioxidants, reduces BC risk in Greek-Cypriot women. Here, we investigated the effect of MnSOD (p.Val16Ala, rs4880) and CAT (-262C>T, rs1001179) SNPs on the association between the MD and BC risk in the case–control study of BC MASTOS in Cyprus. Methods: Dietary intake data were obtained using a 32-item food frequency questionnaire, from which a dietary pattern was previously derived, using principal component analysis. This pattern included high loadings of vegetables, fruit, legumes and fish, a combination that closely resembles the MD and was used as our dietary variable. Results: High vegetable intake lowered BC risk in women with at least one MnSOD Val allele (ORHigh vs. Low for Val/Val = 0.56, 95 % CI 0.35–0.88, for Val/Ala = 0.57, 95 % CI 0.39–0.82), or one CAT -262C allele (ORHigh vs. Low for -262CC = 0.66, 95 % CI 0.47–0.92, for -262CT = 0.53, 95 % CI 0.35–0.81). High fish intake conferred a decreased BC risk of CAT -262CC women (ORQ4 vs. Q1 0.66, 95 % CI 0.47–0.92) compared with the CAT -262TT women and low fish intake (ORQ2 vs. Q1 2.79, 95 % CI 1.08–7.17). Additionally, high fish intake reduced BC risk in MnSOD Val/Val women (ORQ4 vs. Q1 0.63, 95 % CI 0.40–0.98). p interaction values were, however, not statistically significant. Conclusion: Our results demonstrate that the antioxidative effects of the MD against BC risk may be enhanced by the wild-type alleles of the MnSOD or CAT SNPs among Greek-Cypriot women.

Original languageEnglish
Pages (from-to)1535-1544
Number of pages10
JournalEuropean Journal of Nutrition
Volume55
Issue number4
DOIs
Publication statusPublished - 1 Jun 2016

Keywords

  • Breast cancer
  • CAT
  • Mediterranean diet
  • MnSOD
  • Oxidative stress

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    Kakkoura, M. G., Demetriou, C. A., Loizidou, M. A., Loucaides, G., Neophytou, I., Malas, S., Kyriacou, K., & Hadjisavvas, A. (2016). MnSOD and CAT polymorphisms modulate the effect of the Mediterranean diet on breast cancer risk among Greek-Cypriot women. European Journal of Nutrition, 55(4), 1535-1544. https://doi.org/10.1007/s00394-015-0971-5