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- W2338934437 abstract "The accumulation of radiolabeled arachidonic acid (AA), immunoblot analysis of subcellular fractions, and immunofluorescence tagging of proteins in intact cells were used to examine the coupling of ANG II receptors with the activity and location of a cytosolic phospholipase A 2 (cPLA 2 ) in vascular smooth muscle cells (VSMC). ANG II induced the accumulation of AA, which peaked by 10 min and was downregulated by 20 min. A large proportion of the AA released in response to ANG II was due to the activation of a Ca 2+ -dependent lipase coupled to an AT 1 receptor. However, regulation of Ca 2+ availability failed to completely block AA release, and a small but significant reduction in ANG II-mediated AA release was observed in the presence of an AT 2 antagonist. These findings, coupled with a 25% reduction in the ANG II-induced AA release by an inhibitor specific for a Ca 2+ -independent PLA 2 , are consistent with the presence and activation of a Ca 2+ -independent PLA 2 . In contrast, immunoblot analysis and immunofluorescence detection showed that the ANG II-mediated translocation of cPLA 2 to a membrane fraction was exclusively AT 1 dependent and regulated by Ca 2+ availability. Furthermore, the nucleus was the membrane target. We conclude that ANG II regulates the Ca 2+ -dependent activation and translocation of cPLA 2 through an AT 1 receptor and that this event is targeted at the nucleus in VSMC." @default.
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- W2338934437 date "1998-01-01" @default.
- W2338934437 modified "2023-10-17" @default.
- W2338934437 title "ANG II-induced translocation of cytosolic PLA<sub>2</sub>to the nucleus in vascular smooth muscle cells" @default.
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- W2338934437 doi "https://doi.org/10.1152/ajpcell.1998.274.1.c282" @default.
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