Periconceptional maternal diet quality influences blood heavy metal concentrations and their effect on low birth weight: the Japan Environment and Children's Study

被引:13
|
作者
Okubo, Hitomi [1 ,2 ]
Nakayama, Shoji F. [1 ,3 ]
Japan Environm Children's Study Grp
机构
[1] Natl Inst Environm Studies, Japan Environm & Childrens Study Programme Off, Ibaraki, Japan
[2] Japan Soc Promort Sci, Tokyo, Japan
[3] Natl Inst Environm Studies, Japan Environm & Childrens Study Programme Off, 16-2 Onogawa, Tsukuba, Ibaraki 3058506, Japan
关键词
Maternal diet quality; Heavy metal; Low birth weight; Japanese Food Guide Spinning Top; Birth cohort; ENDOCRINE-DISRUPTING CHEMICALS; ENERGY-INTAKE; NUTRITIONAL ADEQUACY; CLUSTER-ANALYSIS; MERCURY LEVELS; FOOD GUIDE; PREGNANCY; PATTERNS; WOMEN; DISEASE;
D O I
10.1016/j.envint.2023.107808
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Background: Both poor maternal nutrition and toxic heavy metal exposure influence foetal growth and devel-opment. However, whether consumption of a variety of healthy foods modifies the association between prenatal heavy metal exposure and foetal growth is unknown.Objective: We examined whether long-term maternal diet quality in periconception modifies the associations between maternal circulating concentrations of heavy metals and foetal growth. Design: Data of 72,317 Japanese women who delivered singleton infants was extracted from the Japan Envi-ronment and Children's Study. Maternal diet over a 1-year before the first trimester of pregnancy was assessed using a validated food frequency questionnaire, and overall diet quality was determined using the balanced diet score based on the Japanese Food Guide Spinning Top. Maternal whole-blood concentrations of mercury (Hg), lead (Pb) and cadmium (Cd) were measured during the second/third trimester of pregnancy. Bayesian inference of multiple linear regression analysis was performed to evaluate the relationships between maternal diet quality and the blood concentrations of heavy metals; Bayesian logistic regression was used to analyse the risk of low birth weight (LBW; <2,500 g).Results: After controlling for confounders, a high maternal balanced diet score was associated with low con-centrations of blood Pb and Cd and high Hg. While all heavy metals assessed were positively associated with LBW risk, a higher maternal balanced diet score was negatively associated with LBW risk. A high-quality maternal diet attenuated the effect of Pb on LBW, an effect that was more marked at high blood Pb concentrations.Conclusion: A high-quality, 'well-balanced' diet prior to conception may reduce exposure to some heavy metals and mitigate the elevated risk of LBW associated with prenatal Pb exposure in Japanese mother-child pairs.
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页数:10
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