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Related Experiment Video

Updated: Jun 21, 2025

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Gestational CBD shapes insular cortex in adulthood.

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    Summary

    Prenatal exposure to cannabidiol (CBD) alters brain development in offspring mice. This disruption affects the insular cortex (IC), impacting emotional processing and potentially leading to behavioral issues.

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    Area of Science:

    • Neuroscience
    • Developmental Biology
    • Pharmacology

    Background:

    • Cannabidiol (CBD) use during pregnancy is common for symptom relief.
    • Limited data exists on CBD's long-term effects on fetal development and offspring behavior.
    • CBD crosses the placenta, potentially influencing fetal neurodevelopment.

    Purpose of the Study:

    • To investigate the effects of prenatal CBD exposure on the developing insular cortex (IC) in offspring.
    • To examine sex-specific and territory-specific alterations in IC neuronal function.
    • To understand how in-utero CBD exposure impacts emotional processing pathways.

    Main Methods:

    • Mice were exposed to low-dose CBD during gestation (embryonic days 5-18).
    • Electrophysiological properties and synaptic strength of insular cortex neurons were analyzed in adult offspring.
    • Comparisons were made between CBD-exposed and control groups, considering sex and IC territory (anterior vs. posterior).

    Main Results:

    • Prenatal CBD exposure induced sex-specific and territory-specific changes in IC neuronal properties.
    • Alterations were observed in membrane properties, intrinsic excitability, and the excitatory/inhibitory balance.
    • CBD exposure led to a loss of functional distinction between the anterior and posterior IC territories.

    Conclusions:

    • In-utero CBD exposure disrupts the normal development of the insular cortex.
    • These disruptions may have long-term consequences for emotional regulation and behavior in offspring.
    • Findings highlight potential risks of prenatal CBD use on neurodevelopment.