Reference : Effect of Intravenous Platelet-Activating Factor on Bovine Pulmonary Mast Cells
Scientific journals : Article
Life sciences : Veterinary medicine & animal health
http://hdl.handle.net/2268/35083
Effect of Intravenous Platelet-Activating Factor on Bovine Pulmonary Mast Cells
English
Jolly, Sandra mailto [Université de Liège - ULg > Département de Morphologie et Pathologie > Pathologie spéciale et autopsies > >]
Thomas, Cédric [> > > >]
Genicot, Bruno [> > > >]
Dessy-Doize, Cécile [> > > >]
Coignoul, Freddy mailto [Université de Liège - ULg > Services administratifs généraux > Vice-Recteur à la Gestion de la qualité - Pathologie générale et autopsies >]
Desmecht, Daniel mailto [Université de Liège - ULg > Département de Morphologie et Pathologie > Pathologie spéciale et autopsies > > >]
2001
Journal of Comparative Pathology
125
Aug-Oct
81-89
Yes (verified by ORBi)
International
0021-9975
[en] platelet ; bronchoconstriction ; hypertension
[en] The effect of platelet-activating factor (PAF) on bovine pulmonary mast cells (MCs) was investigated in calves aged 1-4 months. PAF was administered over a 5-min period at a rate of 50 ng/kg/min to six animals, which were killed approximately 10 min later. No macroscopical lesions were observed in the lung tissue of five control calves. On semi-thin toluidine-blue stained sections, MC cytoplasm showed profuse deep-blue granulation. In the lung tissues of PAF-treated calves, striking interstitial, alveolar and interlobular oedema and emphysema were observed. MC granules occurred at the periphery of the cytoplasm and MC nuclei were easily detectable. Moreover, the number of granules in the MC cytoplasm was remarkably low. A few granules with some metachromatic material were sometimes detected outside the cell limits. Ultrastructurally, the matrix pattern of the MC granules in lung tissues of control calves was either amorphous or granular. In lung tissues of the PAF-treated calves, the granular matrix pattern was pronounced, varying from fine- to coarse-grained, and the MCs were of reduced size, with many filiform processes and exocytotic vesicles. These findings indicate that pulmonary MC degranulation was induced by PAF in healthy calves.
Researchers ; Professionals
http://hdl.handle.net/2268/35083
10.1053/jcpa.2001.0480

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