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NPS-2143 hydrochloride

Catalog No. T4967   CAS 324523-20-8
Synonyms: NPS-2143 HCL

NPS-2143 is a selective potent calcium ion-sensing receptor antagonist.

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NPS-2143 hydrochloride, CAS 324523-20-8
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Purity: 98%
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Biological Description
Chemical Properties
Storage & Solubility Information
Description NPS-2143 is a selective potent calcium ion-sensing receptor antagonist.
Targets&IC50 CaSR:43nM/41nM
In vitro NPS 2143, even when tested at much higher concentrations (3 microM), did not affect the activity of a number of other G protein-coupled receptors, including those most structurally homologous to the Ca2+ receptor. NPS 2143 stimulated parathyroid hormone (PTH) secretion from bovine parathyroid cells (EC50 of 41 nM) over a range of extracellular Ca2+ concentrations and reversed the effects of the calcimimetic compound NPS R-467 on [Ca2+]i and on secretion of PTH . The first reported calcilytic compound was NPS 2143, an orally active molecule which elicits rapid, 3- to 4-fold increases in circulating levels of PTH.
In vivo When infused intravenously in normal rats, NPS 2143 caused a rapid and large increase in plasma levels of PTH. Ca2+ receptor antagonists are termed calcilytics and NPS 2143 is the first substance (either atomic or molecular) shown to possess such activity [1]. When administered together with an antiresorptive agent (estradiol), NPS 2143 causes an increase in trabecular bone volume and bone mineral density in osteopenic rats.
Synonyms NPS-2143 HCL
Molecular Weight 445.38
Formula C24H25ClN2O2.HCl
CAS No. 324523-20-8


Powder: -20°C for 3 years

In solvent: -80°C for 2 years

Solubility Information

DMSO: 50 mg/mL (112.26 mM)

( < 1 mg/ml refers to the product slightly soluble or insoluble )

References and Literature

1. Marquis, Robert W.; Lago, Amparo M.; Callahan, James F.;Antagonists of the Calcium Receptor. 2. Amino Alcohol-Based Parathyroid Hormone Secretagogues. Journal of Medicinal Chemistry (2009), 52(21), 6599-6605. 2. Yamamura A, Guo Q, Yamamura H, Zimnicka AM, Pohl NM, Smith KA, Fernandez RA, Zeifman A, Makino A, Dong H, Yuan JX.Enhanced Ca2+-sensing receptor function in idiopathic pulmonary arterial hypertension.Circ Res. 2012 Aug 3;111(4):469-81. Epub 2012 Jun 22. 3. Davey AE, Leach K, Valant C, Conigrave AD, Sexton PM, Christopoulos A.Positive and negative allosteric modulators promote biased signaling at the calcium-sensing receptor.Endocrinology. 2012 Mar;153(3):1232-41. Epub 2011 Dec 30. 4. Huang Y, Breitwieser GE. Rescue of calcium-sensing receptor mutants by allosteric modulators reveals a conformational checkpoint in receptor biogenesis. J Biol Chem. 2007 Mar 30;282(13):9517-25 5. Nakajima S, Hira T, Hara H.Calcium-sensing receptor mediates dietary peptide-induced CCK secretion in enteroendocrine STC-1 cells.Mol Nutr Food Res. 2012 May;56(5):753-60.

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NPS-2143 hydrochloride 324523-20-8 GPCR/G Protein CaSR NPS2143 NPS-2143 HCL NPS-2143 NPS 2143 hydrochloride Calcium-sensing receptor inhibit SB-262470A Inhibitor NPS 2143 NPS2143 hydrochloride inhibitor