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- W2126516500 abstract "In a previous study, we found a marked difference in the release of a cytokine, neutrophil chemoattractant activity (NCA), from cultured endothelial cells exposed to acute decreases in ambient oxygen, depending on the vascular bed of origin. In the current study, we used this cytokine to evaluate the effect of long-term exposure to decreased oxygen on endothelial cell function. We found that, in aortic and pulmonary arterial endothelial cells maintained for months in decreased ambient oxygen (10 or 3% oxygen), exposure to acute decreases in ambient oxygen caused a change in the pattern of NCA release; however, the differential response between the two cell types persisted. Aortic endothelial cells release NCA when exposed acutely to a level of oxygen below that in which they have been chronically maintained. In contrast, pulmonary arterial endothelial cells release NCA only when exposed to 0% oxygen acutely, but only if grown chronically in 10% oxygen; otherwise there was no release of NCA. As another indicator of endothelial cell function, we evaluated the effects of acute hypoxic exposure on prostacyclin production by endothelial cells maintained in 21 or 3% oxygen. If grown in 21% oxygen, both cell types decreased prostacyclin production upon exposure to 0% oxygen. However, when grown in 3% oxygen, only aortic endothelial cells decreased prostacyclin production when exposed acutely to 0% oxygen; pulmonary arterial endothelial cell prostacyclin production did not change. This study demonstrating the persistence of a differential pattern of NCA release and the appearance of a differential pattern of prostacyclin production after a long-term decrease in environmental oxygen suggests that the capacity of certain vascular endothelial cells to respond to decreases in oxygen concentration is carried by the cell throughout its existence. Thus, in certain situations, vascular endothelial cells may be important in sensing acute decreases in ambient oxygen." @default.
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- W2126516500 date "1990-11-01" @default.
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- W2126516500 title "Effect of long-term hypoxia on cultured aortic and pulmonary arterial endothelial cells" @default.
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- W2126516500 doi "https://doi.org/10.1016/0014-4827(90)90031-5" @default.
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