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- W2018207852 abstract "Elevation of lung capillary pressure causes exocytosis of the leukocyte adhesion receptor P-selectin in endothelial cells (ECs), indicating that lung ECs generate a proinflammatory response to pressure-induced stress. To define underlying mechanisms, we followed the EC signaling sequence leading to P-selectin exocytosis through application of real-time, in situ fluorescence microscopy in lung capillaries. Pressure elevation increased the amplitude of cytosolic Ca2+ oscillations that triggered increases in the amplitude of mitochondrial Ca2+ oscillations and in reactive oxygen species (ROS) production. Responses to blockers of the Ca2+ oscillations and of mitochondrial electron transport indicated that the ROS production was Ca2+ dependent and of mitochondrial origin. A new proinflammatory mechanism was revealed in that pressure-induced exocytosis of P-selectin was inhibited by both antioxidants and mitochondrial inhibitors, indicating that the exocytosis was driven by mitochondrial ROS. In this signaling pathway mitochondria coupled pressure-induced Ca2+ oscillations to the production of ROS that in turn acted as diffusible messengers to activate P-selectin exocytosis. These findings implicate mitochondrial mechanisms in the lung’s proinflammatory response to pressure elevation and identify mitochondrial ROS as critical to P-selectin exocytosis in lung capillary ECs." @default.
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- W2018207852 date "2003-03-01" @default.
- W2018207852 modified "2023-10-11" @default.
- W2018207852 title "Mechano-oxidative coupling by mitochondria induces proinflammatory responses in lung venular capillaries" @default.
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- W2018207852 doi "https://doi.org/10.1172/jci17271" @default.
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