Differential and specific labeling of epithelial and vascular endothelial cells of the rat lung by Lycopersicon esculentum and Griffonia simplicifolia I lectins - PubMed (original) (raw)
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- PMID: 1879433
Differential and specific labeling of epithelial and vascular endothelial cells of the rat lung by Lycopersicon esculentum and Griffonia simplicifolia I lectins
P W Bankston et al. Eur J Cell Biol. 1991 Apr.
Abstract
In the rat lung, we found that the Lycopersicon esculentum (LEA) lectin specifically binds to the epithelium of bronchioles and alveoli whereas Griffonia simplicifolia I (GS-I) binds to the endothelium of alveolar capillaries. The differential binding affinity of these lectins was examined on semithin (approximately 0.5 microns) and thin (less than 0.1 (microns) frozen sections of rat lung lavaged to remove alveolar macrophages. On semithin frozen sections, LEA bound to epithelial cells lining bronchioles and the alveoli (type I, but not type II epithelial cells). On thin frozen sections, biotinylated Lycopersicon esculentum (bLEA)-streptavidin-gold conjugates were confined primarily to the luminal plasmalemma of type I cells. bGS-I-streptavidin-Texas Red was detected on the endothelial cells of alveolar capillaries and postcapillary venules but not on those of larger venules, veins or arterioles. By electron microscopy, GS-I-streptavidin-gold complexes were localized primarily to the luminal plasmalemma of thick and thin regions of the capillary endothelium. Neither lectin labeled type II alveolar cells, but both lectins labeled macrophages in the interstitia and in incompletely lavaged alveoli.
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