Background: Thyroid hormones play a key role in fetal and child development. Recent studies have linked prenatal exposure to atmospheric contaminants with changes in thyroid hormone levels in newborns, but the data from the few studies that have explored this issue are inconclusive. The present study aims to assess the association of total thyroxine (TT4) levels in newborns with weekly prenatal exposure to PM2.5 and NO2 and to identify sensitivity windows to exposure to air pollution in different developmental stages.
Methods: This prospective cohort study included mother-child pairs from the INMA-Gipuzkoa project. Specifically, 463 mother-child pairs with data on PM2.5 and NO2 exposure during pregnancy and TT4 levels at birth were included. PM2.5 and NO2 levels were measured by high-volume aerosol samplers and passive samplers respectively during the women's pregnancies. TT4 levels were measured in heel-prick blood samples from infants. Data on maternal and infant covariates were gathered through questionnaires administered in the first and third trimesters of pregnancy and review of clinical records. Potential associations of PM and NO2 with TT4 levels over the entire pregnancy was assessed by linear regression models and DLMs were used to identify susceptibility windows.
Results: The exposure of pregnant women to PM during pregnancy was positively associated with infant TT4 level at birth (β [95% CI] = 0.198 [0.091, 0.305]. DLMs identified three different sensitivity windows, one in the periconceptional period with a negative association between PM exposure and TT4 levels at birth, and a second (weeks 12-17) and a third one (weeks 31-37) with a positive association. In addition, the later the exposure, the stronger the association. In contrast, no association was observed between NO exposure and TT4 levels.
Conclusions: The results indicate that prenatal exposure to PM could lead to a thyroid function impairment in newborns.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.envres.2021.111132 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Association of diethylhexyl phthalate exposure with serum thyroid hormone levels: a systematic review and meta-analysis.
Am J Transl Res
December 2024
Department of Genetics and Endocrinology, Chengdu Women's and Children's Center Hospital, School of Medicine, University of Electronic Science and Technology of China Chengdu, Sichuan, China.
Objective: Evidence suggests that diethylhexyl phthalate (DEHP) may disrupt thyroid hormone homeostasis by targeting multiple components of the hypothalamic-pituitary-thyroid (HPT) axis, potentially harming human health. However, the relationship between DEHP exposure and thyroid function remains debated. We performed a meta-analysis to clarify the association between DEHP exposure and thyroid function.
View Article and Find Full Text PDFAssociations between exposure to sodium/iodide symporter inhibitors and markers of thyroid function: A systematic review and meta-analysis.
Chemosphere
January 2025
Department of Environmental Science, Baylor University, Waco, TX, USA. Electronic address:
Background: Perchlorate, nitrate, and thiocyanate are well-known sodium/iodide symporter (NIS) inhibitors that disturb iodide uptake at the thyroid, affecting thyroid function. However, the associations between NIS inhibitor exposure and thyroid function are not well summarized in humans.
Objective: We aimed to summarize associations between NIS inhibitor exposure and thyroid function markers and to identify key information gaps for future studies.
Gender differences of neurometabolic and neuroendocrine alternations and its lateralization in adolescents with major depressive disorder.
BMC Psychiatry
December 2024
Department of Psychiatry, First Affiliated Hospital, Jinan University, Guangzhou, 510630, China.
Background: The clinical characteristics of major depressive disorder (MDD) in adolescents show notable gender-related differences, but the cause of these differences is still not understood. The current research concentrates on the changes in neurometabolism and neuroendocrine function, aiming to identify differences in endocrine function and brain metabolism between male and female adolescents with MDD.
Methods: A total of 121 teenagers diagnosed with MDD (43 males and 78 females) were enlisted as participants.
Evaluation of thyroid function tests among children with neurological disorders.
Front Endocrinol (Lausanne)
December 2024
Department of Neurology, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu, China.
Background: Thyroid hormones (THs) are essential for brain development. Numerous studies have identified significant links between thyroid dysfunction and cognitive function. However, research on the significance and necessity of thyroid function tests in diagnosis of neurological disorders is limited and subject to controversy.
View Article and Find Full Text PDFAssociations of gestational exposure to organophosphate esters with thyroid hormones in cord plasma and the safety threshold of exposure in pregnant women.
Environ Res
December 2024
Shanghai-MOST Key Laboratory of Health and Disease Genomics, NHC Key Lab of Reproduction Regulation, Shanghai Institute for Biomedical and Pharmaceutical Technologies, Shanghai, 200237, China. Electronic address:
Background: As a class of synthetic chemicals, organophosphate esters (OPEs) were shown to have thyroid hormones (THs) disrupting potentials in animal studies, while epidemiological evidence on gestational exposure to OPEs and thyroid disruption is limited. Besides, assessment on the safety threshold of OPEs exposure during gestation is especially scarce.
Methods: Based on the Shanghai Minhang Birth Cohort Study, we measured maternal urine concentration of 8 OPE metabolites and THs levels in cord plasma and examined their associations using multiple linear regression and quantile g-computation (QGC) models.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!