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Activation of NAD(P)H oxidase has been reported to produce superoxide (O 2•− ) extracellularly as an autocrine/paracrine regulator or intracellularly as a signaling messenger in a variety of mammalian cells. However, it remains unknown how the activity of NAD(P)H oxidase is regulated in arterial myocytes. Recently, CD38-associated ADP-ribosylcyclase has been reported to use an NAD(P)H...
The present study was designed to determine whether the sarcoplasmic reticulum (SR) could locally produce superoxide (O 2− ) via NAD(P)H oxidase (NOX) in coronary arterial myocytes (CAMs) and to address whether cADPR-RyR/Ca 2+ signaling pathway regulates this local O 2− production from the SR. Using confocal microscopic imaging analysis in intact single CAMs, a cell-permeable...
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