Risk Characterization of Environmental Samples Using In Vitro Bioactivity and Polycyclic Aromatic Hydrocarbon...

Area of Science:

• Environmental Science
• Toxicology
• Biotechnology

Background:

• Traditional chemical exposure assessments focus on individual chemicals, overlooking mixture complexities.
• Environmental samples often contain mixtures of hazardous chemicals, challenging risk characterization.
• In vitro bioactivity assays offer a rapid method for risk-based environmental decisions.

Purpose of the Study:

• To evaluate the utility of in vitro bioactivity measurements for assessing environmental exposure to polycyclic aromatic hydrocarbons (PAHs) in soil samples.
• To investigate the spatial correlation between PAH contaminants and cell-based bioactivity.
• To determine if bioactivity data can predict environmental PAH concentrations and associated risks.

Main Methods:

• Collected 39 surface soil samples post-Hurricane Harvey in a PAH-contaminated residential area.
• Measured in vitro bioactivity using functional and toxicity assays across 5 human cell types.
• Analyzed concentrations of PAHs in the soil samples and correlated with bioactivity data.

Main Results:

• Found significant spatial correlation between a subset of PAHs and cell-based phenotypes.
• Demonstrated that cell-based bioactivity data can predict environmental PAH concentrations and cancer risk.
• Showed cell-based profiling can serve as a rapid hazard screening tool for environmental samples.

Conclusions:

• In vitro bioactivity assays, anchored to chemical concentrations like PAHs, provide a valuable supplement to traditional chemical monitoring.
• This approach enables rapid hazard screening and quantitative risk characterization, identifying areas of concern.
• Cell-based profiling offers a novel method to assess complex environmental exposures and potential health risks.