Neuroprogramming of prenatal phthalate exposures on fluid cognition: A latent variable modeling approach to quantify exposure burden and integrate neurobehavioral data
Jamil M. Lane , Nathan Cohen , Vishal Midya , Cecilia S. Alcala , Shoshannah Eggers , Sandra Martinez-Medina , Damaskini Valvi , Martha M. Téllez-Rojo , Deborah A. Cory-Slechta , Robert O. Wright , Shelley H. Liu
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引用次数: 0
Abstract
Background
Phthalates are endocrine-disrupting chemicals with neuroactive properties linked to maladaptive neurodevelopment in children. However, few studies have utilized latent variable methodologies to estimate their cumulative impact and assess the complex integration of cognitive processes that characterize fluid cognition—the ability to efficiently process, manipulate, and integrate information to solve reasoning problems.
Objective
We investigated the prenatal trimester-specific neuroprogramming effects of the phthalate burden scores on fluid cognition in Mexican children.
Methods
Children (n = 626) aged 6–7 years from a prospective pregnancy cohort in Mexico City were administered subtests from the CANTAB, completing the between error, strategy, and mean latency measures intended to evaluate a broad spectrum of cognitive domains representative of fluid cognition. Phthalate metabolites were measured in maternal urine collected at 2nd and 3rd pregnancy trimesters. A CFA validated and quantified two correlated latent phthalate burden scores representing prenatal exposure to low molecular weight (LMW) and high molecular weight (HMW) phthalates. Trimester-specific models using a covariate-adjusted SEM estimated the associations of latent phthalate burden scores with a latent construct of fluid cognition, an integration of working memory, executive function, and attention tasks.
Results
In the 3rd trimester, higher LMW phthalate burden was associated with poorer fluid cognition (b = −1.860; [95 % CI = −3.505, −0.215]; p = 0.027), while HMW phthalate burden showed a positive association (b = 1.815; [95 % CI = 0.176, 3.453]; p = 0.030). Conversely, in the 2nd trimester, neither burden levels of LMW (b = −0.508; [95 % CI = −1.639, 0.623]; p = 0.378) nor HMW (b = 0.451; [95 % CI = −0.671, 1.573]; p = 0.431]; p = 0.44) phthalate demonstrated significant associations with fluid cognitive performance.
Conclusion
The temporal sensitivity of prenatal phthalate exposures on fluid cognition showed effects in later stages, with higher LMW burden linked to poorer performance and HMW burden showing a positive association. Our findings emphasize latent variable approaches and the need for more research on exposure-driven integrated cognitive programming.
期刊介绍:
Neurotoxicology and Teratology provides a forum for publishing new information regarding the effects of chemical and physical agents on the developing, adult or aging nervous system. In this context, the fields of neurotoxicology and teratology include studies of agent-induced alterations of nervous system function, with a focus on behavioral outcomes and their underlying physiological and neurochemical mechanisms. The Journal publishes original, peer-reviewed Research Reports of experimental, clinical, and epidemiological studies that address the neurotoxicity and/or functional teratology of pesticides, solvents, heavy metals, nanomaterials, organometals, industrial compounds, mixtures, drugs of abuse, pharmaceuticals, animal and plant toxins, atmospheric reaction products, and physical agents such as radiation and noise. These reports include traditional mammalian neurotoxicology experiments, human studies, studies using non-mammalian animal models, and mechanistic studies in vivo or in vitro. Special Issues, Reviews, Commentaries, Meeting Reports, and Symposium Papers provide timely updates on areas that have reached a critical point of synthesis, on aspects of a scientific field undergoing rapid change, or on areas that present special methodological or interpretive problems. Theoretical Articles address concepts and potential mechanisms underlying actions of agents of interest in the nervous system. The Journal also publishes Brief Communications that concisely describe a new method, technique, apparatus, or experimental result.