What question did this study set out to answer?

To evaluate how particle surface chemistry and topography influence the immersion of inhaled microparticles into the lung's aqueous surface-lining layer.

May 1, 2003Journal of Applied Physiology

Influence of surface chemistry and topography of particles on their immersion into the lung's surface-lining layer

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Authors

MGMarianne GeiserUniversity of Bern SSSamuel SchürchUniversity of Bern PGPeter GehrUniversity of Bern

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Implication

Experimental study demonstrates that surfactant films immerse inhaled microparticles into the lung lining fluid in hamsters, indicating airway surface tension drives cellular particle exposure.

Key Points

To evaluate how particle surface chemistry and topography influence the immersion of inhaled microparticles into the lung's aqueous surface-lining layer.
Examined deposited 1–6 µm polystyrene spheres, Teflon spheres, and puffball spores in hamster intrapulmonary conducting airways and alveoli using electron microscopy.
Assessed the extent of particle immersion across varying surfactant film surface tensions using a floating-drop-surface balance and light microscopy.
Polystyrene and Teflon spheres achieved 50% to 60% immersion at surface tensions of 30 and 25 mJ/m², respectively, and reached total submersion at 25 and 15 mJ/m².
Puffball spores were ~50% immersed at 22 mJ/m² and completely submersed at film surface tensions of ≤15 mJ/m².
Particles in hamster airways were submersed adjacent to epithelial cells, indicating intrapulmonary conducting airway surface tension reaches ≤15 mJ/m² and facilitates particle-cell contact.

Cite This Study

Geiser et al. (2003) studied this question.

synapsesocial.com/papers/6a7978674c448619ca0dbf27 https://doi.org/10.1152/japplphysiol.00514.2002

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Implication

Experimental study demonstrates that surfactant films immerse inhaled microparticles into the lung lining fluid in hamsters, indicating airway surface tension drives cellular particle exposure.

Influence of surface chemistry and topography of particles on their immersion into the lung's surface-lining layer

Discussion

Member takes

Implication

Key Points

Cite This Study

Influence of surface chemistry and topography of particles on their immersion into the lung's surface-lining layer

Discussion

Member takes

Implication

Key Points

Cite This Study

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