Dietary intake of nutrients involved in folate-mediated one-carbon metabolism and risk for endometrial cancer

Jana Lu, Britton Trabert, Linda M. Liao, Ruth M. Pfeiffer, Kara A. Michels

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Background: Studies disagree as to whether intakes of folate-mediated one-carbon metabolism nutrients are associated with endometrial cancer. Methods: Using data from the large, prospective NIH-AARP Diet and Health Study, we used Cox proportional hazards models to evaluate endometrial cancer risk associated with calorie-adjusted dietary intake of several B vitamins and methionine. All models accounted for age, race, body mass index (BMI), smoking, oral-contraceptive use, menopausal hormone therapy use and caloric intake. We estimated associations by time from baseline (3 or >3 years) and stratified models by BMI (<25 or 25 kg/m2). During 16 years of follow-up, we identified 2329 endometrial cancer cases among 114 414 participants. Results: After adjustment for confounding, we observed increased risk for endometrial cancer with greater consumption of dietary total folate, natural folate, B2, B6 and B12 [hazard ratios (HRs) ranging from 1.14 to 1.24 for the highest quintile (Q5) vs the lowest (Q1)]. Higher intakes of total folate, natural folate, B6 and B12 continued to be associated with increased risk when limiting follow-up to >3 years from baseline. We observed risks for the highest intakes of B2 [Q5 vs Q1: HR 1.27 95% confidence interval (CI) 1.07-1.50], B12 (Q5 vs Q1: HR 1.38 CI 1.17-1.63) and methionine (Q5 vs Q1: HR 1.26 CI 1.07-1.48) among women who were overweight/obese, but not among normal/underweight women. Conclusions: Our findings indicate that one-carbon metabolism plays a role in endometrial carcinogenesis and exploration of this role in tissue and cellular biology studies is warranted.

Original languageEnglish (US)
Pages (from-to)474-488
Number of pages15
JournalInternational journal of epidemiology
Volume48
Issue number2
DOIs
StatePublished - Apr 1 2019
Externally publishedYes

Keywords

  • Diet
  • Endometrial cancer
  • Folate-mediated one-carbon metabolism
  • Prospective cohort study

ASJC Scopus subject areas

  • Epidemiology

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