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- W2024003925 abstract "For particle retention and clearance, the structure and surface properties of the airway lining layer are important. Due to difficulties of its preservation, structural analysis has been hampered, and, hence, the existence of two distinct and continuous phases and how much osmiophilic material is available are unclear. It was the objective of this study to investigate the ultrastructure of the aqueous lining layer in the intrathoracic conducting airways of hamsters. By means of transmission electron microscopy, we investigated the ultrastructure of the airway lining layer in hamsters whose lungs have been fixed by the application of fixative dissolved in nonpolar fluorocarbon, either by instillation via the trachea or injection into the gas exchange parenchyma, together with intravascular perfusion of aqueous fixatives. The results were compared to lungs fixed by intravascular perfusion only. In twelve hamsters, the airway lining layer was found to consist of by intravascular perfusion only. In twelve hamsters, the airway lining layer was found to consist of an aqueous phase and was coated by an osmiophilic film that follows fairly closely the upper-extending contours of cilia protruding from epithelial cells. Substantially less osmiophilic material was preserved in extrapulmonary airways and when nonaqueous fixative was injected. We found that the aqueous lining layer of the intrathoracic airways in hamsters essentially surrounds and covers the cilia, the microvilli, and any other structures like macrophages or deposited particles contained in it and is coated by an osmiophilic film of variable thickness. In healthy animals, a gel phase is expected to be very thin, not clearly separated from the periciliary fluid, and located just beneath the osmiophilic film. Microsc. Res. Tech. 36:428–437, 1997. © 1997 Wiley-Liss, Inc." @default.
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- W2024003925 date "1997-03-01" @default.
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- W2024003925 title "Ultrastructure of the aqueous lining layer in hamster airways: Is there a two-phase system?" @default.
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- W2024003925 doi "https://doi.org/10.1002/(sici)1097-0029(19970301)36:5<428::aid-jemt13>3.0.co;2-u" @default.
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