(1R,3S)-)-1-[3-[[4-(2-Fluorophenyl)-1-piperazinyl]methyl]-4-methoxyphenyl]-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylic acid, Ned-19, trans (1R,3S)-NED-19
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NAADP (nicotinic acid adenine dinucleotide phosphate) has recently been recognized as a crucial Ca2+-releasing second messenger in several mammalian tissues including pancreatic, brain and cardiac. Ned-19 is a potent inhibitor of NAADP action. It is a selective blocker of cellular NAADP-induced Ca2+-release and can fluorescently label NAADP receptors. Ned-19 blocks NAADP signaling at nanomolar concentrations. In intact cells, Ned-19 blocked NAADP signaling and fluorescently labeled NAADP receptors.The trans-Ned-19 is more potent than the cis form in regard to both inhibition of Ca2+ release (IC50 of 6 nM versus 800 nM) and [32P]NAADP binding (IC50 of 0.4 nM versus 15 μM).
Potent inhibitor of NAADP action, selective blocker of cellular NAADP-induced Ca2+-release; fluorescently labels NAADP receptors