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- W2055147835 abstract "Reperfusion injury with pulmonary edema continues to be a major complication after lung transplantation. Alveolar fluid homeostasis is regulated by Na+/K+-ATPase activity on the basolateral surface of alveolar epithelial cells. Intact Na+/K+-ATPase is essential to the resolution of pulmonary edema. We characterized the effects of cold ischemia and reperfusion on expression of Na+/K+-ATPase mRNA and protein.Baseline values for Na+/K+-ATPase mRNA and protein were determined from freshly harvested lungs with no cold storage time or reperfusion (group I). Group II lungs were analyzed after cold storage times of 12 or 24 hr without subsequent reperfusion. Group III lungs were analyzed after cold storage times of 12 or 24 hr with subsequent reperfusion. Lungs were flushed with either Euro-Collins (EC) or University of Wisconsin (UW) solution in each group. All samples were quantified for Na+/K+-ATPase mRNA and Na+/K+-ATPase protein. Physiological parameters including oxygenation and compliance were also measured.There were no significant differences in the level of mRNA and protein for samples that were cold stored without reperfusion (group II). With reperfusion (group III) there was a significant increase in the level of the Na+/K+-ATPase mRNA after 12 hr of storage for both EC and UW. After 24 hr of storage and subsequent reperfusion, lungs flushed with EC had significantly decreased Na+/K+-ATPase protein and mRNA, although lungs preserved with UW maintained their increased levels of Na+/K+-ATPase protein and mRNA.Our data suggest that ischemia-reperfusion injury results in an initial up-regulation of Na+/K+-ATPase mRNA. With prolonged injury in lungs preserved with EC, the level of the mRNA decreased with a corresponding decrease in the Na+/K+-ATPase protein. The different response seen in EC versus UW may be explained by better preservation of pump function with UW than EC and correlates with improved physiological function in lungs preserved with UW solution." @default.
- W2055147835 created "2016-06-24" @default.
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- W2055147835 date "2000-10-01" @default.
- W2055147835 modified "2023-10-14" @default.
- W2055147835 title "MODULATION OF PULMONARY NA+ PUMP GENE EXPRESSION DURING COLD STORAGE AND REPERFUSION1" @default.
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- W2055147835 doi "https://doi.org/10.1097/00007890-200010150-00005" @default.
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