Human Brain Organoids Model Abnormal Prenatal Neural Development Induced by Thermal Stimulation

Abstract

The developing human foetal brain is sensitive to thermal stimulation during pregnancy. However, the mechanisms by which heat exposure affects human foetal brain development remain unclear, largely due to the lack of appropriate research models for studying thermal stimulation. To address this, we have developed a periodic heating model based on brain organoids derived from human pluripotent stem cells. The model recapitulated neurodevelopmental disruptions under prenatal heat exposure at the early stages, providing a paradigm for studying the altered neurodevelopment under environmental stimulation. Our study found that periodic heat exposure led to decreased size and impaired neural tube development in the brain organoids. Bulk RNA-seq analysis revealed that the abnormal WNT signalling pathway and the reduction of G2/M progenitor cells might be involved in heat stimulation. Further investigation revealed increased neural differentiation and decreased proliferation under heat stimulation, indicating that periodic heat exposure might lead to abnormal brain development by altering key developmental processes. Hence, our model of periodically heating brain organoids provides a platform for modelling the effects of maternal fever on foetal brain development and could be extended to applications in neurodevelopmental disorders intervention.

Keywords

brain organoids / environmental stimulation / foetal brain development / maternal hyperthermia / neurodevelopmental disorders

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