Related Experiment Video
Updated: Aug 4, 2026
11:26
Harvesting Murine Alveolar Macrophages and Evaluating Cellular Activation Induced by Polyanhydride Nanoparticles
Published on: June 8, 2012
Ultrafine particles in human lung macrophages
R Hauser1, J J Godleski, V Hatch
1Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts 02115, USA.
Archives of Environmental Health
|May 8, 2001
Summary
Ultrafine particles are present in lung macrophages of all individuals, even non-smokers. Higher particle counts correlate with reduced lung function, indicating potential respiratory health risks from environmental exposure.
Area of Science:
- Environmental Health
- Toxicology
- Pulmonary Medicine
Background:
- Growing evidence links particle size to toxicity, with ultrafine particles (<0.1 micrometers) showing greater pulmonary toxicity in animal studies.
- Exposure to and accumulation of ultrafine particles in the human lung may be associated with adverse respiratory health effects.
Purpose of the Study:
- To investigate the presence of ultrafine particles in lung macrophages of healthy non-smokers.
- To explore the association between ultrafine particle load and pulmonary function.
Main Methods:
- Bronchoalveolar lavage was performed on 14 healthy non-smokers.
- Lung macrophages were isolated and analyzed for ultrafine particles using electron microscopy.
- Pulmonary function tests (including FEV1.0) were conducted on 10 subjects.
Main Results:
- Ultrafine particles were detected in lung macrophages of all 14 volunteers, with an average of 95 particles/µm³ cytoplasm.
- A significant inverse association was found between the number of ultrafine particles and percent predicted forced expiratory volume in 1 second (FEV1.0).
Conclusions:
- Environmental exposure to ultrafine particles is widespread, affecting even healthy non-smokers.
- The presence of ultrafine particles in the lungs is negatively associated with ventilatory function, highlighting the need for further research into their health impacts.
