Macronutrient intakes and serum oestrogen, and interaction with polymorphisms in CYP19A1 and HSD17B1 genes: a cross-sectional study in postmenopausal Japanese women

• Published in: British journal of nutrition 2017-09, Vol.118 (6), p.463-472
• Main Authors: Takagi, Sahoko, Naito, Mariko, Kawai, Sayo, Okada, Rieko, Nagata, Chisato, Hosono, Satoyo, Nishida, Yuichiro, Takashima, Naoyuki, Suzuki, Sadao, Shimoshikiryo, Ippei, Mikami, Haruo, Uemura, Hirokazu, Kuriyama, Nagato, Ohnaka, Keizo, Kubo, Michiaki, Hamajima, Nobuyuki, Tanaka, Hideo, Wakai, Kenji
• Format: Article
• Language: English
• Subjects: Aged; Alcohol; Androgens; Animals; Aromatase - genetics; Asian Continental Ancestry Group - genetics; Breast cancer; Carbohydrates; Cross-Sectional Studies; Diet; Dietary Carbohydrates - administration & dosage; Dietary Fats - administration & dosage; Dietary intake; Dietary Proteins - administration & dosage; Dietary Surveys and Nutritional Epidemiology; Enzymes; Epidemiology; Estradiol - blood; Estradiol Dehydrogenases - genetics; Estrogens; Estrogens - blood; Estrone; Fatty acids; Fatty Acids - administration & dosage; Fatty Acids - blood; Fatty Acids, Omega-3 - administration & dosage; Fatty Acids, Omega-3 - blood; Female; Fishes; Food; Genes; Genotyping Techniques; Health care; Health risk assessment; Health risks; Hormones; Humans; Japan; Life Style; Lifestyles; Linear Models; Medical research; Menopause; Middle Aged; Noodles; Polymorphism; Polymorphism, Single Nucleotide; Post-menopause; Postmenopause - blood; Prevention; Preventive medicine; Quartiles; Questionnaires; Regression analysis; Regression models; Seafood; Surveys and Questionnaires; University graduates; Validity; Women; Womens health
• ISSN: 0007-1145; 1475-2662
• DOI: 10.1017/S0007114517002239

Although higher circulating levels of oestrogen are related to postmenopausal breast cancer risk, limited information is available regarding effects of diet on endogenous oestrogen. Thus, we examined associations between macronutrient intakes and serum oestrogen with consideration of polymorphisms in oestrogen-metabolising genes. In this cross-sectional study, 784 naturally menopaused Japanese women aged 47–69 years were selected from participants of the Japan Multi-Institutional Collaborative Cohort Study. We documented dietary intakes, measured serum concentrations of oestrone (E1) and oestradiol (E2) and genotyped polymorphisms in oestrogen-metabolising CYP19A1 (rs4441215 and rs936306) and HSD17B1 (rs605059) genes. Trends and interactions were examined using linear regression models. In addition, we calculated the ratios of the oestrogen concentrations of the second to the highest quartiles (Q2–Q4) of dietary intake to those of the lowest quartiles (Q1). After adjustment for potential confounders, E2 was significantly associated with intake of carbohydrate and noodles; ratios of Q4 v. Q1 were 1·15 (95 % CI 1·04, 1·28) and 1·15 (95 % CI 1·04, 1·26), respectively. In contrast, E2 levels were inversely associated with intake of total energy, SFA and n-3 highly unsaturated fatty acids (n-3 HUFA); ratios of Q4 v. Q1 were 0·90 (95 % CI 0·82, 0·99), 0·89 (95 % CI 0·81, 0·98) and 0·91 (95 % CI 0·83, 1·00), respectively. In stratified analysis by polymorphisms, the rs605059 genotype of HSD17B1 significantly modified associations of E2 with intake of n-3 HUFA and fish; the associations were limited to those with the CC genotype. Macronutrient intakes were associated with serum E2 level, and these associations may be modified by HSD17B1 polymorphism in postmenopausal women.