ArticleArchives of toxicology2025
Developmental exposure to methyl ester sulfonate induces autism-like behavioral deficits in mice by dysregulation of the Notch/Hes signaling pathway disrupting neuronal differentiation.
Article in Archives of toxicology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Developmental exposure to environmental pollutants is increasingly recognized as a significant risk factor for autism spectrum disorder (ASD), yet the specific mechanisms by which individual toxicants contribute to this neurodevelopmental disorder remain largely unknown. Methyl ester sulfonate (MES), a widely used anionic surfactant with widespread environmental detection, lacks comprehensive evaluation for developmental neurotoxicity. Here, we exposed pregnant mice to environmentally relevant MES doses (0.06-6 mg/L) from gestational day 8.5 (GD8.5) to postnatal day 21.5 (PND21.5) and assessed their offspring for neurodevelopmental changes. Results showed dose-dependent ASD-like behavioral deficits, including impaired social interactions, heightened anxiety-like behaviors, and increased repetitive/stereotypic patterns. These behavioral anomalies were accompanied by neuropathological alterations, including blood-brain barrier disruption, neuronal loss, and reduced dendritic spine density, indicative of impaired synaptogenesis. Integrative transcriptomic analysis of hippocampal tissue revealed significant dysregulation of key pathways involved in neurodevelopment, prominently featuring the Notch/Hes signaling pathway. Molecular docking simulations suggested that MES could directly interact with Notch receptors, potentially disrupting ligand-receptor interactions. Further in vitro experimental validation demonstrated that MES exposure suppressed neural stem cell differentiation. Collectively, these findings provided evidence that early-life MES exposure acts as a neurodevelopmental toxicant by disrupting Notch/Hes signaling, thereby impairing neuronal differentiation and synaptogenesis, which underlined the observed ASD-like behavioral deficits in mice. This study offers novel mechanistic insights into how environmental factors contribute to ASD pathogenesis and highlights the need for toxicological assessment of widely distributed surfactants.
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