Genetic variation at CYP3A is associated with age at menarche and breast cancer risk: a case-control study.

ABSTRACT:

Introduction

We have previously shown that a tag single nucleotide polymorphism (rs10235235), which maps to the CYP3A locus (7q22.1), was associated with a reduction in premenopausal urinary estrone glucuronide levels and a modest reduction in risk of breast cancer in women age ≤50 years.

Methods

We further investigated the association of rs10235235 with breast cancer risk in a large case control study of 47,346 cases and 47,570 controls from 52 studies participating in the Breast Cancer Association Consortium. Genotyping of rs10235235 was conducted using a custom Illumina Infinium array. Stratified analyses were conducted to determine whether this association was modified by age at diagnosis, ethnicity, age at menarche or tumor characteristics.

Results

We confirmed t

SUBMITTER: Johnson N 

PROVIDER: S-EPMC4522594 | biostudies-literature | 2014 May

REPOSITORIES: biostudies-literature