KB-R7943 mesylate
Chemical Name: 2-[2-[4-(4-Nitrobenzyloxy)phenyl]ethyl]isothiourea mesylate
Purity: ≥99%
Biological Activity
KB-R7943 mesylate is a potent, selective inhibitor of the reverse mode of the Na+/Ca2+ exchanger (IC50 = 0.7 μM). Also inhibits the mitochondrial Ca2+ uniporter (MCU; IC50 = 5.5 μM). Does not affect Na+-dependent transport systems or ionotropic glutamate receptors.Technical Data
The technical data provided above is for guidance only.
For batch specific data refer to the Certificate of Analysis.
Tocris products are intended for laboratory research use only, unless stated otherwise.
Background References
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Reverse Na+/Ca2+ exchange contributes to glutamate-induced intracellular Ca2+ concentration increases in cultured rat forebrain neurons.
Hoyt et al.
Mol.Pharmacol., 1998;53:742 -
The plasma membrane +/Ca2+ exchange inhibitor KB-R7943 is also a potent inhibitor of the mitochondrial Ca2+ uniporter.
Santo-Domingo et al.
Br.J.Pharmacol., 2007;151:647 -
The novel Na+/Ca2+ exchange inhibitor KB-R7943 protects CA1 neurons in rat hippocampal slices against hypoxia/hypoglycemic injury.
Schr?der et al.
Neuropharmacology, 1999;38:319 -
Effect of +/Ca2+ exchange inhibitor, KB-R7943 on ouabain-induced arrhythmias in guinea-pigs.
Watano et al.
Br.J.Pharmacol., 1999;127:1846
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Citations for KB-R7943 mesylate
The citations listed below are publications that use Tocris products. Selected citations for KB-R7943 mesylate include:
42 Citations: Showing 1 - 10
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NCX1 Represents an Ionic Na+ Sensing Mechanism in Macrophages.
Authors: Neubert Et al.
PLoS Biol 2020;18
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Paraneoplastic cerebellar degeneration: Yo antibody alters mitochondrial calcium buffering capacity.
Authors: Panja Et al.
Neuropathol Appl Neurobiol 2019;45:141
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Antinociceptive effectiveness of the inhibition of NCX reverse-mode action in rodent neuropathic pain model.
Authors: Huang Et al.
Mol Pain 2019;15:1744806919864510
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Methyl-β-Cyclodextrin Impairs the Phosphorylation of the β2 Subunit of L-Type Calcium Channels and Cytosolic Calcium Homeostasis in Mature Cerebellar Granule Neurons.
Authors: Fortalezas Et al.
Int J Mol Sci 2018;19
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Transient Opening of the Mitochondrial Permeability Transition Pore Induces Microdomain Calcium Transients in Astrocyte Processes.
Authors: Agarwal Et al.
Neuron 2017;93:587
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KB-R7943 reduces 4-aminopyridine-induced epileptiform activity in adult rats after neuronal damage induced by neonatal monosodium glutamate treatment.
Authors: Hernandez-Ojeda Et al.
J Biomed Sci 2017;24:27
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Dendritic cell amiloride-sensitive channels mediate sodium-induced inflammation and hypertension.
Authors: Barbaro
Cell Rep 2017;21(4):1009
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Transient Oxygen/Glucose Deprivation Causes a Delayed Loss of Mitochondria and Increases Spontaneous Calcium Signaling in Astrocytic Processes.
Authors: O'Donnell Et al.
J Neurosci 2016;36:7109
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Transient receptor potential canonical (TRPC)/Orai1-dependent store-operated Ca2+ channels: New targets of aldosterone in cardiomyocytes.
Authors: Sabourin Et al.
J.Biol.Chem. 2016;291:13394
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Antagonism of Nav channels and α1-adrenergic receptors contributes to vascular smooth muscle effects of ranol.
Authors: Virsolvy Et al.
Am J Physiol Renal Physiol 2015;5:17969
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A new mouse model for stationary night blindness with mutant Slc24a1 explains the pathophysiology of the associated human disease.
Authors: Vinberg Et al.
Hum Mol Genet 2015;24:5915
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Role of Na+/Ca2+ exchanger in Ca2+ homeostasis in rat suprachiasmatic nucleus neurons.
Authors: Wang Et al.
J Neurophysiol 2015;113:2114
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An inhibitor of Na(+)/Ca(2+) exchange blocks activation of insect olfactory receptors.
Authors: Bobkov Et al.
Biochem Biophys Res Commun 2014;450:1104
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The effect of high [K(+)]o on spontaneous Ca(2+) waves in freshly isolated interstitial cells of Cajal from the rabbit urethra.
Authors: Drumm Et al.
Physiol Rep 2014;2:e00203
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R.zole and gabapentinoids activate glutamate transporters to facilitate glutamate-induced glutamate release from cultured astrocytes.
Authors: Yoshizumi Et al.
Eur J Pharmacol 2012;677:87
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Cytosolic calcium coordinates mitochondrial energy metabolism with presynaptic activity.
Authors: Chouhan Et al.
J Neurosci 2012;32:1233
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Pro-death and pro-survival properties of ouabain in U937 lymphoma derived cells.
Authors: Cuozzo Et al.
J Exp Clin Cancer Res 2012;31:95
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The epithelial sodium/proton exchanger, NHE3, is necessary for renal and intestinal calcium (re)absorption.
Authors: Pan Et al.
Biochem Biophys Res Commun 2012;302:F943
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Na delivery and ENaC mediate flow regulation of collecting duct endothelin-1 production.
Authors: Pandit Et al.
Am J Physiol Renal Physiol 2012;302:F1325
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Molecular and functional characterization of the human platelet Na(+) /Ca(2+) exchangers.
Authors: Roberts Et al.
Br J Pharmacol 2012;165:922
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High potency inhibition of hERG potassium channels by the sodium-calcium exchange inhibitor KB-R7943.
Authors: Cheng Et al.
Br J Pharmacol 2012;165:2260
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Enhanced Ca(2+)-sensing receptor function in idiopathic pulmonary arterial hypertension.
Authors: Yamamura Et al.
Circ Res 2012;111:469
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Inhibition of spontaneous activity of rabbit atrioventricular node cells by KB-R7943 and inhibitors of sarcoplasmic reticulum Ca(2+) ATPase.
Authors: Cheng Et al.
Cell Calcium 2011;49:56
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Mechanistic distinction between activation and inhibition of (Na(+)+K(+))-ATPase-mediated Ca2+ influx in cardiomyocytes.
Authors: Xu Et al.
Proc Natl Acad Sci U S A 2011;406:200
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PKC-dependent coupling of calcium permeation through transient receptor potential canonical 3 (TRPC3) to calcineurin signaling in HL-1 myocytes.
Authors: Poteser Et al.
Am J Physiol Regul Integr Comp Physiol 2011;108:10556
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Inhibition of beta-cell sodium-calcium exchange enhances glucose-dependent elevations in cytoplasmic calcium and Ins secretion.
Authors: Hamming Et al.
Diabetes 2010;59:1686
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Non-cardiomyocytes influence the electrophysiological maturation of human embryonic stem cell-derived cardiomyocytes during differentiation.
Authors: Kim Et al.
Sci Rep 2010;19:783
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The Na+/Ca2+ exchange inhibitor 2-(2-(4-(4-nitrobenzyloxy)phenyl)ethyl)isothiourea methanesulfonate (KB-R7943) also blocks ryanodine receptors type 1 (RyR1) and type 2 (RyR2) channels.
Authors: Barrientos Et al.
Mol Pharmacol 2009;76:560
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Na+ mechanism of delta-opioid receptor induced protection from anoxic K+ leakage in the cortex.
Authors: Chao Et al.
Cell Mol Life Sci 2009;66:1105
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Mitochondrial regulation of sarcoplasmic reticulum Ca2+ content in vascular smooth muscle cells.
Authors: Poburko Et al.
Circ Res 2009;104:104
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The Na+/Ca2+ exchanger inhibitor, KB-R7943, blocks a nonselective cation channel implicated in chemosensory transduction.
Authors: Pezier Et al.
J Neurophysiol 2009;101:1151
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Enhanced spontaneous Ca2+ events in endothelial cells reflect signalling through myoendothelial gap junctions in pressurized mesenteric arteries.
Authors: Kansui Et al.
Cell Calcium 2008;44:135
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White matter vulnerability to ischemic injury increases with age because of enhanced excitotoxicity.
Authors: Baltan Et al.
Stem Cells Dev 2008;28:1479
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Mechanisms of the lysophosphatidic acid-induced increase in [Ca(2+)](i) in skeletal muscle cells.
Authors: Xu Et al.
J Cell Mol Med 2008;12:942
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Functional coupling between the Na+/Ca2+ exchanger and nonselective cation channels during histamine stimulation in guinea pig tracheal smooth muscle.
Authors: Algara-Suárez Et al.
Am J Physiol Lung Cell Mol Physiol 2007;293:L191
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Activation of subfornical organ neurons in rats through pre- and postsynaptic α-adrenoceptors.
Authors: Honda Et al.
Nat Protoc 2006;290:R1646
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Ionic mechanisms of cardiac cell swelling induced by blocking Na+/K+ pump as revealed by experiments and simulation.
Authors: Takeuchi Et al.
J Gen Physiol 2006;128:495
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Plasma membrane KATP channel-mediated cardioprotection involves posthypoxic reductions in calcium overload and contractile dysfunction: mechanistic insights into cardioplegia.
Authors: Baczkó Et al.
FASEB J 2005;19:980
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Hypocretin/orexin peptide signaling in the ascending arousal system: elevation of intracellular calcium in the mouse dorsal raphe and laterodorsal tegmentum.
Authors: Kohlmeier Et al.
J Neurophysiol 2004;92:221
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Effects of Na+/Ca2+ exchange induced by SR Ca2+ release on action potentials and afterdepolarizations in guinea pig ventricular myocytes.
Authors: Spencer and Sham
Am J Physiol Heart Circ Physiol 2003;285:H2552
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A flagellar K(+)-dependent Na(+)/Ca(2+) exchanger keeps Ca(2+) low in sea urchin spermatozoa.
Authors: Su
Proc Natl Acad Sci U S A 2002;99:6743
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Motility initiation in herring sperm is regulated by reverse sodium-calcium exchange.
Authors: Vines Et al.
Proc Natl Acad Sci U S A 2002;99:2026
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