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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Cytotoxic effects of 3-methylindole on alveolar epithelial cells and macrophages: with special reference to microtubular and filamentous assemblies in alveolar type I cells of bovine lung.

The alveolar type I cell is a major permeability barrier between the pulmonary interstitium and alveolar spaces and its thin cytoplasmic processes are greatly susceptible to injury. These cells are often observed to undergo progressive vesiculation, vacuolization and desquamation during 3-methylindole (3MI)-induced acute pulmonary edema after oral administration in goats and cattle. The present study describes proliferation of SER and the presence of polymerized tubulin in the form of microtubules arranged in large bundles shown at ultrastructural level as well as with immunofluorescence staining for tubulin in alveolar type I cells 72 hours after 3MI treatment. Such changes were not seen in pulmonary endothelial cells, alveolar type II cells, alveolar macrophages and neutrophils. The possible role of microtubules in alveolar type I cells as a mechanistic support to resist disruption against the forces of interstitial and alveolar edema is compared with alveolar type II cells, alveolar macrophages and neutrophils. The latter cells undergo dynamic movements in response to inflammatory stimuli and therefore did not show microtubules in their cytoplasm.[1]


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