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.
|Storage||Store at RT|
The technical data provided above is for guidance only. For batch specific data refer to the Certificate of Analysis.
All Tocris products are intended for laboratory research use only.
|Solvent||Max Conc. mg/mL||Max Conc. mM|
Preparing Stock Solutions
The following data is based on the product molecular weight 427.49. Batch specific molecular weights may vary from batch to batch due to solvent of hydration, which will affect the solvent volumes required to prepare stock solutions.
|Concentration / Solvent Volume / Mass||1 mg||5 mg||10 mg|
|1 mM||2.34 mL||11.7 mL||23.39 mL|
|5 mM||0.47 mL||2.34 mL||4.68 mL|
|10 mM||0.23 mL||1.17 mL||2.34 mL|
|50 mM||0.05 mL||0.23 mL||0.47 mL|
References are publications that support the biological activity of the product.
Hoyt et al (1998) Reverse Na+/Ca2+ exchange contributes to glutamate-induced intracellular Ca2+ concentration increases in cultured rat forebrain neurons. Mol.Pharmacol. 53 742 PMID: 9547366
Santo-Domingo et al (2007) The plasma membrane +/Ca2+ exchange inhibitor KB-R7943 is also a potent inhibitor of the mitochondrial Ca2+ uniporter. Br.J.Pharmacol. 151 647 PMID: 17471180
Schröder et al (1999) The novel Na+/Ca2+ exchange inhibitor KB-R7943 protects CA1 neurons in rat hippocampal slices against hypoxia/hypoglycemic injury. Neuropharmacology 38 319 PMID: 10218875
Watano et al (1999) Effect of +/Ca2+ exchange inhibitor, KB-R7943 on ouabain-induced arrhythmias in guinea-pigs. Br.J.Pharmacol. 127 1846 PMID: 10482915
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Keywords: KB-R7943 mesylate, KB-R7943 mesylate supplier, Na+/Ca2+, exchange, inhibitors, reverse, mode, inhibits, Sodium, Calcium, Exchanger, Ion, Transporters, Pumps, Ca2+, Signaling, Signalling, NCX, Mitochondrial, Uniporter, 1244, Tocris Bioscience
36 Citations for KB-R7943 mesylate
Citations are publications that use Tocris products. Selected citations for KB-R7943 mesylate include:
Cheng et al (2011) Inhibition of spontaneous activity of rabbit atrioventricular node cells by KB-R7943 and inhibitors of sarcoplasmic reticulum Ca(2+) ATPase. Cell Calcium 49 56 PMID: 21163524
Baltan et al (2008) White matter vulnerability to ischemic injury increases with age because of enhanced excitotoxicity. Stem Cells Dev 28 1479 PMID: 18256269
Xu et al (2008) Mechanisms of the lysophosphatidic acid-induced increase in [Ca(2+)](i) in skeletal muscle cells. J Cell Mol Med 12 942 PMID: 18494935
Kansui et al (2008) Enhanced spontaneous Ca2+ events in endothelial cells reflect signalling through myoendothelial gap junctions in pressurized mesenteric arteries. Cell Calcium 44 135 PMID: 18191200
Barbaro (2017) Dendritic cell amiloride-sensitive channels mediate sodium-induced inflammation and hypertension. Cell Rep 21 1009 PMID: 29069584
Hernandez-Ojeda et al (2017) KB-R7943 reduces 4-aminopyridine-induced epileptiform activity in adult rats after neuronal damage induced by neonatal monosodium glutamate treatment. J Biomed Sci 24 27 PMID: 28486943
Xu et al (2011) Mechanistic distinction between activation and inhibition of (Na(+)+K(+))-ATPase-mediated Ca2+ influx in cardiomyocytes. Proc Natl Acad Sci U S A 406 200 PMID: 21303662
Poteser et al (2011) PKC-dependent coupling of calcium permeation through transient receptor potential canonical 3 (TRPC3) to calcineurin signaling in HL-1 myocytes. Am J Physiol Regul Integr Comp Physiol 108 10556 PMID: 21653882
Algara-Suárez et al (2007) Functional coupling between the Na+/Ca2+ exchanger and nonselective cation channels during histamine stimulation in guinea pig tracheal smooth muscle. Am J Physiol Lung Cell Mol Physiol 293 L191 PMID: 17449794
Drumm et al (2014) The effect of high [K(+)]o on spontaneous Ca(2+) waves in freshly isolated interstitial cells of Cajal from the rabbit urethra. Physiol Rep 2 e00203 PMID: 24744882
Bobkov et al (2014) An inhibitor of Na(+)/Ca(2+) exchange blocks activation of insect olfactory receptors. Biochem Biophys Res Commun 450 1104 PMID: 24996179
Pan et al (2012) The epithelial sodium/proton exchanger, NHE3, is necessary for renal and intestinal calcium (re)absorption. Biochem Biophys Res Commun 302 F943 PMID: 21937605
Kim et al (2010) Non-cardiomyocytes influence the electrophysiological maturation of human embryonic stem cell-derived cardiomyocytes during differentiation. Sci Rep 19 783 PMID: 20001453
Sabourin et al (2016) Transient receptor potential canonical (TRPC)/Orai1-dependent store-operated Ca2+ channels: New targets of aldosterone in cardiomyocytes. J.Biol.Chem. 291 13394 PMID: 27129253
Cheng et al (2012) High potency inhibition of hERG potassium channels by the sodium-calcium exchange inhibitor KB-R7943. Br J Pharmacol 165 2260 PMID: 21950687
Pandit et al (2012) Na delivery and ENaC mediate flow regulation of collecting duct endothelin-1 production. Am J Physiol Renal Physiol 302 F1325 PMID: 22357920
Yamamura et al (2012) Enhanced Ca(2+)-sensing receptor function in idiopathic pulmonary arterial hypertension. Circ Res 111 469 PMID: 22730443
Cuozzo et al (2012) Pro-death and pro-survival properties of ouabain in U937 lymphoma derived cells. J Exp Clin Cancer Res 31 95 PMID: 23153195
Honda et al (2006) Activation of subfornical organ neurons in rats through pre- and postsynaptic α-adrenoceptors. Nat Protoc 290 R1646 PMID: 16455764
Takeuchi et al (2006) Ionic mechanisms of cardiac cell swelling induced by blocking Na+/K+ pump as revealed by experiments and simulation. J Gen Physiol 128 495 PMID: 17074975
Virsolvy et al (2015) Antagonism of Nav channels and α1-adrenergic receptors contributes to vascular smooth muscle effects of ranolazine. Am J Physiol Renal Physiol 5 17969 PMID: 26655634
Baczkó et al (2005) Plasma membrane KATP channel-mediated cardioprotection involves posthypoxic reductions in calcium overload and contractile dysfunction: mechanistic insights into cardioplegia. FASEB J 19 980 PMID: 15774423
Roberts et al (2012) Molecular and functional characterization of the human platelet Na(+) /Ca(2+) exchangers. Br J Pharmacol 165 922 PMID: 21790537
Chouhan et al (2012) Cytosolic calcium coordinates mitochondrial energy metabolism with presynaptic activity. J Neurosci 32 1233 PMID: 22279208
Hamming et al (2010) Inhibition of beta-cell sodium-calcium exchange enhances glucose-dependent elevations in cytoplasmic calcium and insulin secretion. Diabetes 59 1686 PMID: 20413506
Pezier et al (2009) The Na+/Ca2+ exchanger inhibitor, KB-R7943, blocks a nonselective cation channel implicated in chemosensory transduction. J Neurophysiol 101 1151 PMID: 19118110
Kohlmeier et al (2004) Hypocretin/orexin peptide signaling in the ascending arousal system: elevation of intracellular calcium in the mouse dorsal raphe and laterodorsal tegmentum. J Neurophysiol 92 221 PMID: 14999052
Spencer and Sham (2003) Effects of Na+/Ca2+ exchange induced by SR Ca2+ release on action potentials and afterdepolarizations in guinea pig ventricular myocytes. Am J Physiol Heart Circ Physiol 285 H2552 PMID: 12933341
Wang et al (2015) Role of Na+/Ca2+ exchanger in Ca2+ homeostasis in rat suprachiasmatic nucleus neurons. J Neurophysiol 113 2114 PMID: 25568156
Vinberg et al (2015) A new mouse model for stationary night blindness with mutant Slc24a1 explains the pathophysiology of the associated human disease. Hum Mol Genet 24 5915 PMID: 26246500
Yoshizumi et al (2012) Riluzole and gabapentinoids activate glutamate transporters to facilitate glutamate-induced glutamate release from cultured astrocytes. Eur J Pharmacol 677 87 PMID: 22206816
Poburko et al (2009) Mitochondrial regulation of sarcoplasmic reticulum Ca2+ content in vascular smooth muscle cells. Circ Res 104 104 PMID: 19023135
Chao et al (2009) Na+ mechanism of delta-opioid receptor induced protection from anoxic K+ leakage in the cortex. Cell Mol Life Sci 66 1105 PMID: 19189047
Barrientos et al (2009) 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. Mol Pharmacol 76 560 PMID: 19509218
Vines et al (2002) Motility initiation in herring sperm is regulated by reverse sodium-calcium exchange. Proc Natl Acad Sci U S A 99 2026 PMID: 11842223
Su (2002) A flagellar K(+)-dependent Na(+)/Ca(2+) exchanger keeps Ca(2+) low in sea urchin spermatozoa. Proc Natl Acad Sci U S A 99 6743 PMID: 12011436
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Literature in this Area
Tocris offers the following scientific literature in this area to showcase our products. We invite you to request* or download your copy today!
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Epilepsy is a brain disease that affects 60 million people globally. More than 20 anti-seizure drugs are currently available, but these do not address the underlying causes of the condition. This poster summarizes current knowledge about the development of the condition and highlights some approaches that have disease-modifying effects in proof-of-concept studies.