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Cannabinoids and gene expression during brain development.

Javier Fernández-Ruiz1, María Gómez, Mariluz Hernández

  • 1Department of Biochemistry and Molecular Biology, Faculty of Medicine, Complutense University, Ciudad Universitaria s/n, 28040-Madrid, Spain. jjfr@med.ucm.es

Neurotoxicity Research
|November 17, 2004
PubMed
Summary

Perinatal cannabinoid exposure, including during pregnancy and lactation, can disrupt offspring neurodevelopment. Cannabinoids affect gene expression in neurotransmitter systems and neural development, potentially leading to long-term behavioral changes.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Pharmacology

Background:

  • Cannabis use, particularly among young people and pregnant women, is prevalent.
  • Cannabinoids cross the placental barrier and are secreted in breast milk, exposing the developing fetus and infant.
  • Perinatal cannabinoid exposure can lead to neurodevelopmental disturbances and altered behavioral patterns in offspring.

Purpose of the Study:

  • To review evidence linking cannabinoid exposure to gene expression during neural development.
  • To explore the epigenetic mechanisms by which cannabinoids influence brain development.
  • To identify future research directions for understanding cannabinoid's impact on neurodevelopment.

Main Methods:

  • Review of existing scientific literature on cannabinoid exposure and gene expression.

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  • Analysis of studies investigating the effects of cannabinoids on neurotransmitter systems (dopamine, opioids).
  • Examination of research on cannabinoid influence on genes related to neural development, cell adhesion, and apoptosis.

    • Main Results:

    • Cannabinoids alter the expression of key genes for neurotransmitters like tyrosine hydroxylase and proenkephalin.
    • Evidence suggests cannabinoids influence genes involved in cell proliferation, migration, and axonal elongation.
    • Cannabinoids may impact apoptotic cell death during brain development, potentially via the Bcl-2/Bax system.

    Conclusions:

    • Perinatal cannabinoid exposure can epigenetically modify neural development by altering gene expression.
    • CB1 receptors, targets of cannabinoids, are expressed in critical brain regions for development, suggesting a direct role.
    • Further research is needed to fully elucidate the long-term consequences and mechanisms of cannabinoid-induced epigenetic changes in brain development.