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Polymorphisms in the MTHFR gene are associated with recurrence risk in lymph node-positive breast cancer patients

Authors Suner A, Buyukhatipoglu H, Aktas G, Kus T, Ulaslı M, Oztuzcu S, Kalender M, Sevinc A, Kul S, Camci C

Received 23 January 2016

Accepted for publication 6 July 2016

Published 9 September 2016 Volume 2016:9 Pages 5603—5609


Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Narasimha Reddy Parine

Peer reviewer comments 5

Editor who approved publication: Professor Min Li

Ali Suner,1 Hakan Buyukhatipoglu,1 Gokmen Aktas,1 Tulay Kus,1 Mustafa Ulaslı,2 Serdar Oztuzcu,2 Mehmet Emin Kalender,1 Alper Sevinc,1 Seval Kul,3 Celaletdin Camci1

1Division of Medical Oncology, Department of Internal Medicine, Gaziantep Oncology Hospital, University of Gaziantep, Gaziantep, Turkey; 2Department of Medical Biology, Faculty of Medicine, University of Gaziantep, Gaziantep, Turkey; 3Department of Biostatistics, Faculty of Medicine, University of Gaziantep, Gaziantep, Turkey

Purpose: The aim of this study is to clarify the relationship between recurrence risk of breast cancer and methylenetetrahydrofolate reductase (MTHFR) C677T polymorphisms.
Patients and methods: Breast cancer patients who had undergone surgery in Gaziantep University Oncology Hospital between June 2005 and June 2012 were followed-up and retrospectively enrolled in this study. Blood samples were collected from all patients to assess MTHFR C677T polymorphisms. Stage according to tumor–node–metastasis system, estrogen receptor, progesterone receptor, human epidermal growth factor receptor 2 status, grade of disease, menopausal status, and administered chemotherapy or hormonal therapy were recorded. Effects of these parameters on recurrence risk were evaluated using univariate analysis and multivariate binary logistic regression model.
Results: Association of MTHFR C677T polymorphisms with recurrence risk was evaluated in 298 patients whose median age was 47 years (range: 21–79 years). In all patients, age (odds ratio [OR] =0.953, P=0.005) and N3 lymph node status (OR =6.293, P=0.001) were found to affect the recurrence risk. While MTHFR homozygote genotype did not have an effect on recurrence risk in all patients, increased risk was observed in lymph node-positive subgroup (OR =4.271; 95% CI 1.515–12.023; P=0.006). Adjusting for age, tumor size (T), and node status (N), MTHFR homozygote genotype had more statistically significant risk for recurrence (OR =3.255; 95% CI 1.047–10.125; P=0.041).
Conclusion: MTHFR TT genotype was found to be associated with increased recurrence risk in patients with lymph node-positive breast cancer.

Keywords: breast cancer, methylenetetrahydrofolate reductase, MTHFR, rs9651118 polymorphism, recurrence risk

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