In vitro exposure to complete engine emissions - a mini-review.

Area of Science:

• Environmental Health
• Toxicology
• In Vitro Models

Background:

• Outdoor air pollution, a human carcinogen, increases risks of cardiovascular, neurological, and pulmonary diseases.
• Vehicle engine emissions are major contributors to air pollution, especially in urban areas.
• Assessing the health impacts of engine emissions requires reliable biological test systems.

Purpose of the Study:

• To review and technically characterize exposure systems for assessing engine exhaust biological effects.
• To discuss biological parameters detected after exposure to gasoline/diesel exhaust.
• To compare the advantages and limitations of developed exposure systems.

Main Methods:

• Focus on exposure systems using multicellular cell models at the air-liquid interface.
• Utilize complete engine exhaust (particles, bound chemicals, gaseous phase).
• Emphasize controlled delivery and characterization of exhaust composition.

Main Results:

• Description and technical characterization of various engine exhaust exposure systems.
• Discussion of biological responses observed in cell models upon exposure.
• Comparison of system performance, including strengths and weaknesses.

Conclusions:

• Reliable test systems are crucial for evaluating engine exhaust health impacts.
• Multicellular models exposed to realistic exhaust mixtures offer valuable insights.
• Further development and standardization of these systems are needed.