Neurodevelopmental liabilities of substance abuse

Area of Science:

• Neuroscience
• Developmental Biology
• Toxicology

Background:

• The perinate (fetus and neonate) is highly susceptible to neurotoxic insults.
• Exposure to various chemical species can lead to neuronal apoptosis or necrosis, impacting brain development.
• Life-long functional and behavioral deficits can result from impaired neurodevelopment.

Purpose of the Study:

• To provide an overview of substances that pose risks to perinatal brain development.
• To highlight the neuroteratogenic potential of maternal hormones and therapeutic anesthetics.
• To explore the mechanisms underlying chemically induced neurodevelopmental toxicity.

Main Methods:

• Literature review of neuroteratogens affecting perinatal brain development.
• Analysis of the mechanisms by which substances induce neuronal apoptosis or necrosis.
• Examination of the role of maternal hormones (estrogens, corticosteroids) and anesthetics.

Main Results:

• Substances of abuse, elevated maternal estrogens, and corticosteroids can act as neuroteratogens.
• Anesthetics can induce neonatal neuronal apoptosis by interfering with N-methyl-D-aspartate receptors or gamma-aminobutyric acid pathways.
• These exposures can cross the placenta and alter fetal neural development.

Conclusions:

• Perinatal exposure to various agents poses significant risks to brain development.
• Understanding the molecular mechanisms of neuroteratogenesis is crucial for prevention.
• Intervention strategies targeting these mechanisms may prevent neurodevelopmental disorders.