The study of disturbance on pulmonary endothelial cell during lung allograft rejection

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Histological changes of the grafted lungs during acute lung allograft rejection To investigate the relation between the injury to endothelial cells and specific immunoresponse during lung allograft rejection, we studied for donor specific cytotoxic activity in recipient PBL and histological changes of the grafted lung. It was found that there was exudation, which appeared to be caused by hyperpermiability of endothelial cells, in the alveolar space at the time of increased cytotoxic activity. It is considered that an evaluation of viability in endothelial cells is essential to study for lung injury due to rejection.Changes of Prostaglandin I2 release capacity from dog lungs PGI2 releasing capacity induced by bradykinin from endothelial cells of dog lung which were injured by normothermic preservation, and correlation between the changes in vitro and gas exchanie function of grafted lung in vivo was investigated. It was found that PGI2 releasing capacity in injured lungs showed significant decrease. It is considered that this assay is useful to estimate the viability of endothelial cells.