Association between ABCB1 C3435T polymorphism and breast cancer risk: a Moroccan case-control study and meta-analysis

BMC Genetics

Research Article

Yaya Kassogue¹  Hind Dehbi¹  Sellama Nadifi¹  Bréhima Diakité¹  Amal Tazzite¹  Abdellatif Benider²  Hassan Jouhadi² 

[1] Genetics and Molecular Pathology Laboratory, Medical school of Casablanca, Casablanca Hassan II University, 19 Rue Tarik Ibnou Ziad, B.P. 9154, Casablanca, Morocco;Mohammed VI Center for Cancer Treatment, Ibn Rochd University Hospital, Casablanca, Morocco;

关键词: ABCB1;    C3435T;    Polymorphism;    Breast cancer;    Morocco;   

DOI  :  10.1186/s12863-016-0434-x

 received in 2016-06-11, accepted in 2016-08-24,  发布年份 2016

来源: Springer

【 摘 要 】

BackgroundBreast cancer is the most common cause of cancer death among women. Several studies have investigated the relationship between the C3435T polymorphism of ABCB1 gene and risk of breast cancer; but the results are conflicting. In the present study, we sought to assess the relationship between the C3435T polymorphism in ABCB1 gene and the risk of breast cancer in a sample of the Moroccan population.MethodsA case control study was performed on 60 breast cancer patients and 68 healthy women. The ABCB1 C3435T polymorphism was analyzed by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) assay. Furthermore, a meta-analysis including 16 studies with 6094 cases of breast cancer and 8646 controls was performed.ResultsGenotype frequencies were 50 % for CC, 33.3 % for CT and 16.7 % for TT in patients and 41.2 % for CC, 48.5 % for CT and 10.3 % for TT respectively in the control group. This difference was not statistically significant. The same trend as observed in the allele distribution between patients and controls (P = 0.84). Findings from the meta-analysis showed that the ABCB1 C3435T polymorphism was not associated with an increased risk of breast cancer in the dominant model (OR = 0.907; 95 % CI = 0.767–1.073; P = 0.25) as well as in the recessive model (OR = 1.181; 95 % CI = 0.973–1.434; P = 0.093) and in the allele contrast model (OR = 1.098; 95 % CI = 0.972–1.240; P = 0.133). However, the stratification of studies on ethnic basis showed that the TT genotype was associated with the risk of breast cancer in Asians (OR = 1.405; 95 % CI = 1.145–1.725; P = 0.001), Caucasians (OR = 1.093; 95 % CI = 1.001–1.194; P = 0.048) and North African (OR = 2.028; 95 % CI = 1.220–3.371; P = 0.006).ConclusionsWe have noted that the implication of C3435T variant on the risk of breast cancer was ethnicity-dependent. However, there is no evidence that ABCB1 C3435T polymorphism could play a role in susceptibility to breast cancer in Morocco. Further studies with a larger sample size, extended to other polymorphisms are needed to understand the influence of ABCB1 genetic variants on the risk of breast cancer.

【 授权许可】

CC BY   
© The Author(s). 2016