Dataset Information

Perinatal Exposure to Triclosan Results in Abnormal Brain Development and Behavior in Mice.

ABSTRACT: Triclosan (TCS) is one of the most common endocrine-disrupting chemicals (EDCs) present in household and personal wash products. Recently, concerns have been raised about the association between abnormal behavior in children and exposure to EDC during gestation. We hypothesized that exposure to TCS during gestation could affect brain development. Cortical neurons of mice were exposed in vitro to TCS. In addition, we examined in vivo whether maternal TCS administration can affect neurobehavioral development in the offspring generation. We determined that TCS can impair dendrite and axon growth by reducing average length and numbers of axons and dendrites. Additionally, TCS inhibited the proliferation of and promoted apoptosis in neuronal progenitor cells. Detailed behavioral analyses showed impaired acquisition of spatial learning and reference memory in offspring derived from dams exposed to TCS. The TCS-treated groups also showed cognition dysfunction and impairments in sociability and social novelty preference. Furthermore, TCS-treated groups exhibited increased anxiety-like behavior, but there was no significant change in depression-like behaviors. In addition, TCS-treated groups exhibited deficits in nesting behavior. Taken together, our results indicate that perinatal exposure to TCS induces neurodevelopment disorder, resulting in abnormal social behaviors, cognitive impairment, and deficits in spatial learning and memory in offspring.

SUBMITTER: Tran DN

PROVIDER: S-EPMC7312693 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature

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Perinatal Exposure to Triclosan Results in Abnormal Brain Development and Behavior in Mice.

Tran Dinh Nam DN Jung Eui-Man EM Yoo Yeong-Min YM Lee Jae-Hwan JH Jeung Eui-Bae EB

International journal of molecular sciences 20200603 11

Triclosan (TCS) is one of the most common endocrine-disrupting chemicals (EDCs) present in household and personal wash products. Recently, concerns have been raised about the association between abnormal behavior in children and exposure to EDC during gestation. We hypothesized that exposure to TCS during gestation could affect brain development. Cortical neurons of mice were exposed in vitro to TCS. In addition, we examined in vivo whether maternal TCS administration can affect neurobehavioral ...[more]

PMID: 32503345

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Project description:BACKGROUND:Triclosan exposure may decrease circulating thyroxine levels or cause neuron apoptosis, which in turn may adversely affect neurodevelopment. However, few studies have examined the association of early life triclosan exposure with child behavior. OBJECTIVE:To quantify the association between early-life triclosan exposure and child behavior at age 8-years in 202 mother-child pairs from the HOME study (Cincinnati, OH; enrolled: 2003-2006). METHODS:We quantified urinary triclosan concentrations up to 3 times in mothers (16-weeks, 26-weeks, and delivery) and up to 6 times in children (1, 2, 3, 4, 5, and 8?years). Parents rated children's problem behaviors at age 8-years using the Behavioral Assessment System for Children-2 (BASC-2). Adjusting for covariates and accounting for exposure measurement error, we estimated changes in behavior problem scores per 10-fold increase in mean gestational and childhood triclosan concentrations. In addition, we estimated sex-specific associations. RESULTS:Child sex modified the association of gestational and childhood triclosan with several BASC-2 scales (sex?×?triclosan p-values?<?0.2). In boys, increasing gestational triclosan was associated with higher behavioral symptom index (?: 4.5; 95% CI: 1.0, 8.1), externalizing problems (?: 5.0; 95% CI: 1.2, 9.0), attention problem (?: 6.6; 95% CI: 2.4, 11), hyperactivity (?: 6.4; 95% CI: 2.1, 11), and somatization (?: 3.8; 95% CI: 0.3, 7.3) scores. In contrast, triclosan-BASC-2 associations in girls were generally null and not statistically significant. We observed similar patterns of associations between childhood triclosan and these same behavioral scores; however, their magnitude decreased substantially after adjusting for gestational triclosan and associations were not statistically significant. CONCLUSION:In this cohort, increasing gestational and childhood urinary triclosan concentrations were associated with higher behavior problem scores in 8-year old boys, but not girls.

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Perinatal Exposure to Triclosan Results in Abnormal Brain Development and Behavior in Mice.

Publications

Perinatal Exposure to Triclosan Results in Abnormal Brain Development and Behavior in Mice.

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