Toxicological Effects of Air Pollutants on Human Airway Cell Models Using Air-liquid Interface Systems: A Systematic...

Area of Science:

• Environmental Toxicology
• Cellular Biology
• Respiratory Medicine

Background:

• Rising global air pollution from anthropogenic sources increases exposure to harmful pollutants.
• Airway epithelial cells are the primary interface for inhaled pollutants.
• Traditional submerged cell cultures have limitations in mimicking in vivo respiratory conditions.

Purpose of the Study:

• To review the toxicological effects of air pollution on airway epithelial cells.
• To highlight the utility of air-liquid interface (ALI) models in respiratory toxicology.
• To explore molecular mechanisms underlying air pollution-induced cellular responses.

Main Methods:

• Review of 53 studies integrating toxicology, epidemiology, and molecular/cell biology.
• Focus on in vitro studies using human airway cellular models based on ALI systems.
• Analysis of biomarkers and gene expression related to cellular responses.

Main Results:

• Air pollution exposure induces oxidative, inflammatory, and genotoxic responses in airway epithelial cells.
• ALI models offer a more accurate representation of in vivo conditions compared to submerged cultures.
• Key molecular pathways, particularly oxidative stress, are implicated in observed health effects.

Conclusions:

• ALI cellular models are essential tools for respiratory toxicology and environmental health research.
• Understanding molecular mechanisms of air pollution toxicity is crucial for public health.
• Future research should explore complex atmospheric conditions and long-term exposure models.