Research Paper Volume 9, Issue 2 pp 547—555

Genetic polymorphisms (rs10636 and rs28366003) in metallothionein 2A increase breast cancer risk in Chinese Han population

Di Liu 1, *, , Meng Wang 1, *, , Tian Tian 1, *, , Xi-Jing Wang 1, , Hua-Feng Kang 1, , Tian-Bo Jin 2, , Shu-Qun Zhang 1, , Hai-Tao Guan 1, , Peng-Tao Yang 1, , Kang Liu 1, , Xing-Han Liu 1, , Peng Xu 1, , Yi Zheng 1, , Zhi-Jun Dai 1, ,

  • 1 Department of Oncology, Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710004, China
  • 2 National Engineering Research Center for Miniaturized Detection Systems, School of Life Sciences, Northwest University, Xi’an 710069, China
* Equal contribution

received: November 14, 2016 ; accepted: February 9, 2017 ; published: February 22, 2017 ;

https://doi.org/10.18632/aging.101177
How to Cite

Abstract

Genetic polymorphisms of MT2A are frequently observed in many different cancers. We performed this case-control study, including 459 breast cancer (BC) patients and 549 healthy controls from Northwest China, to evaluate the associations between two common MT2A polymorphisms (rs10636 and rs28366003) and BC risk. The MT2A polymorphisms were genotyped via Sequenom MassARRAY. The individuals with the rs28366003 A/G, A/G-G/G genotypes underwent a higher risk of BC (P<0.0001). And, the minor allele G of rs28366003 was related to an increased BC risk (P<0.0001). We also found a significantly increased BC risk with rs10636 polymorphism among homozygote and recessive models (P<0.05). Further subgroup analysis by clinical characteristics of BC patients showed that Scarff, Bloom and Richardson tumor grade (SBR) 1-2 have a higher expression of the minor allele of these two MT2A loci than SBR 3. Our results indicated that the rs10636 and rs28366003 polymorphisms in MT2A increased BC risk in Northwest Chinese Han population.

Abbreviations

MT2A: metallothioneins 2A; BC: breast cancer; SNP: single nucleotide polymorphism; OR: odds ratio CI: confidence interval; HWE: Hardy-Weinberg equilibrium; ER: Estrogen receptor; PR: Progesterone receptor; Her-2: human epidermal growth factor receptor 2.