Associations between prenatal multiple plasma metal exposure and newborn telomere length: Effect modification by maternal age and infant sex

Exposure to metals during pregnancy may affect maternal and infant health. However, studies on the combined effects of metals on the telomere length (TL) of newborns are limited. A prospective cohort study was conducted among 1313 mother–newborn pairs in the Guangxi Zhuang Birth Cohort. The concentr...

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Published in:Environmental pollution (1987) 2022-12, Vol.315, p.120451-120451, Article 120451
Main Authors: Tang, Peng, He, Wanting, Shao, Yantao, Liu, Bihu, Huang, Huishen, Liang, Jun, Liao, Qian, Tang, Ying, Mo, Meile, Zhou, Yong, Li, Han, Huang, Dongping, Liu, Shun, Zeng, Xiaoyun, Qiu, Xiaoqiang
Format: Article
Language:English
Subjects:
antimony
arsenic
barium
Bayesian theory
China
cohort studies
females
Joint effects
lead
maternal exposure
Metals
neonates
Newborns
Plasma
pollution
pregnancy
principal component analysis
spectroscopy
Telomere length
telomeres
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Summary:Exposure to metals during pregnancy may affect maternal and infant health. However, studies on the combined effects of metals on the telomere length (TL) of newborns are limited. A prospective cohort study was conducted among 1313 mother–newborn pairs in the Guangxi Zhuang Birth Cohort. The concentrations of metals in maternal plasma during the first trimester were measured using inductively coupled plasma–mass spectrometry. We explored the associations between nine plasma metals and newborn TL using generalized linear models (GLMs), principal component analysis (PCA), quantile g-computation (qgcomp), and Bayesian kernel machine regression (BKMR). The GLMs revealed the inverse association between plasma arsenic (percent change, −5.56%; 95% CI: -7.69%, −3.38%) and barium concentrations (−9.84%; 95% CI: -13.81%, −5.68%) and newborn TL. Lead levels were related to significant decreases in newborn TL only in females. The PCA revealed a negative association between the PC3 and newborn TL (−4.52%; 95% CI: -6.34%, −2.68%). In the BKMR, the joint effect of metals was negatively associated with newborn TL. Qgcomp indicated that each one-tertile increase in metal mixture levels was associated with shorter newborn TL (−9.39%; 95% CI: -14.32%, −4.18%). The single and joint effects of multiple metals were more pronounced among pregnant women carrying female fetuses and among pregnant women
ISSN:0269-7491
1873-6424
DOI:10.1016/j.envpol.2022.120451