Traffic-related air pollution and brain development

Area of Science:

• Environmental Health
• Neuroscience
• Toxicology

Background:

• Urbanization increases exposure to traffic-related air pollution (TRP).
• TRP is linked to adverse birth outcomes and neurodevelopmental disorders like autism and schizophrenia.
• Cognitive effects of TRP are increasingly recognized alongside known cardio-respiratory impacts.

Purpose of the Study:

• To review the effects of TRP on brain health and cognition in humans and animals.
• To explore the underlying mechanisms of TRP-induced neurodevelopmental and cognitive alterations.
• To identify potential neuroprotective interventions.

Main Methods:

• Review of human epidemiological studies on TRP exposure and neurodevelopmental outcomes.
• Analysis of rodent models examining pre- and neonatal exposure to TRP.
• Investigation of inflammatory and behavioral changes in exposed animal models.

Main Results:

• TRP exposure is associated with increased risk of autism spectrum disorders, schizophrenia, and low birth weight.
• Rodent models demonstrate persistent inflammation and altered adult behavior and cognition following TRP exposure.
• Observed behavioral and inflammatory changes in rodents exhibit a male bias.

Conclusions:

• TRP poses a significant threat to brain development and cognitive function.
• Mechanisms involve persistent inflammation, with potential sex-specific effects.
• Rodent models offer insights for developing dietary and other interventions to protect against TRP neurotoxicity.