Human airway construct model is suitable for studying transcriptome changes associated with indoor air particulate...

Area of Science:

• Toxicology
• In vitro modeling
• Respiratory health

Background:

• Investigating indoor air particulate matter (PM) toxicity requires accurate in vitro models of the human respiratory system.
• Understanding the health impacts of inhaled pollutants is crucial for public health.

Purpose of the Study:

• To develop and validate a pulmonary cell culture model for assessing indoor air PM toxicity.
• To analyze the toxicological transcriptome of normal human bronchial epithelial cells exposed to indoor air PM.

Main Methods:

• Exposed human bronchial epithelial cells at the air-liquid interface to indoor air PM.
• Measured interleukin-8, protein concentration, and tissue electrical resistance.
• Utilized RNA sequencing with a targeted toxicology panel for gene expression analysis.

Main Results:

• Indoor air PM exposure did not cause acute cellular toxicity.
• Observed significant up-regulation (34 genes) and down-regulation (17 genes) in gene expression.
• Top up-regulated genes were associated with immunotoxicity.

Conclusions:

• The developed in vitro model effectively characterized the toxicological transcriptome of indoor air PM.
• The model provides insights into the immunotoxic potential of indoor air pollutants.
• Further refinement of cell differentiation may enhance model sensitivity.