For research use only.

Catalog No.S2633 Synonyms: SB262470

13 publications

NPS-2143 Chemical Structure

CAS No. 284035-33-2

NPS-2143 (SB262470) is a novel potent and selective antagonist of Ca(2+) receptor with IC50 of 43 nM.

Selleck's NPS-2143 has been cited by 13 publications

1 Customer Review

  • The effects of a GPRC6A inhibitor on testosterone-induced ROS generation. Cells were pretreated with the GPRC6A inhibitor, NPS2143 (1 uM), for 30 min and ROS generation was monitored after 5 min of testosterone treatment. Data are presented as mean ?S.E. (n = 4).

    J Biol Chem 2014 289(42), 28835-45. NPS-2143 purchased from Selleck.

Purity & Quality Control

Choose Selective CaSR Inhibitors

Biological Activity

Description NPS-2143 (SB262470) is a novel potent and selective antagonist of Ca(2+) receptor with IC50 of 43 nM.
Ca(2+) receptor [1]
43 nM
In vitro

NPS 2143 blocks increases in cytoplasmic Ca2+ concentrations with IC50 of 43 nM elicited by activating the Ca2+ receptor in HEK 293 cells expressing the human Ca2+ receptor. [1] NPS 2143 stimulates parathyroid hormone (PTH) secretion from bovine parathyroid cells with EC50 of 41 nM. Moreover, NPS 214 also blocks the inhibitory effects of calcimimetic NPS R-467 on PTH secretion from bovine parathyroid cells and the inhibitory effects of extracellular Ca2+ on isoproterenol-stimulated increases in cyclic AMP formation. [1] In HEK-293 cells transiently expressing hCaSRs, NPS 2143 significantly suppresses the kokumi taste by effectively inhibiting the activity of both GSH (data not shown) and γ-Glu-Val-Gly. [3] A recent study shows that NPS 2143 treatment suppresses low molecular weight fractions of azuki hydrolysate-induced cholecystokinin (CCK) secretion in CaSR-transfected HEK 293 cells. [4]

In vivo In rats, NPS 2143 results in a rapid 4- to 5-fold increase in plasma PTH levels and also a transient increase in plasma Ca2+ levels. [1] In normotensive rats, NPS 2143 administration (1 mg/kg) by i.v. markedly increases mean arterial blood pressure (MAP) in the presence of parathyroid glands. [2]


Animal Research:[1]
- Collapse
  • Animal Models: Chronic indwelling catheters are implanted in the inferior vena cava and in the abdominal aorta of male Sprague-Dawley rats.
  • Dosages: ≤0.1 μmol/kg · min
  • Administration: Administered via i.v.
    (Only for Reference)

Solubility (25°C)

In vitro DMSO 82 mg/mL (200.52 mM)
Water Insoluble
Ethanol Insoluble
In vivo Add solvents to the product individually and in order(Data is from Selleck tests instead of citations):
2% DMSO+corn oil
For best results, use promptly after mixing.

* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.

Chemical Information

Molecular Weight 408.92


CAS No. 284035-33-2
Storage powder
in solvent
Synonyms SB262470
Smiles CC(C)(CC1=CC2=CC=CC=C2C=C1)NCC(COC3=C(C(=CC=C3)Cl)C#N)O

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)
Dosage mg/kg Average weight of animals g Dosing volume per animal ul Number of animals
Step 2: Enter the in vivo formulation ()
% DMSO % % Tween 80 % ddH2O

Bio Calculators

Molarity Calculator

Molarity Calculator

Calculate the mass, volume or concentration required for a solution. The Selleck molarity calculator is based on the following equation:

Mass (mg) = Concentration (mM) × Volume (mL) × Molecular Weight (g/mol)

  • Mass
    Molecular Weight

*When preparing stock solutions, please always use the batch-specific molecular weight of the product found on the via label and SDS / COA (available on product pages).

Dilution Calculator

Dilution Calculator

Calculate the dilution required to prepare a stock solution. The Selleck dilution calculator is based on the following equation:

Concentration (start) x Volume (start) = Concentration (final) x Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2 ( Input Output )

  • C1

* When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and SDS / COA (available online).

The Serial Dilution Calculator Equation

  • Serial Dilutions

  • Computed Result

  • C1=C0/X C1: LOG(C1):
    C2=C1/X C2: LOG(C2):
    C3=C2/X C3: LOG(C3):
    C4=C3/X C4: LOG(C4):
    C5=C4/X C5: LOG(C5):
    C6=C5/X C6: LOG(C6):
    C7=C6/X C7: LOG(C7):
    C8=C7/X C8: LOG(C8):
Molecular Weight Calculator

Molecular Weight Calculator

Enter the chemical formula of a compound to calculate its molar mass and elemental composition:

Total Molecular Weight: g/mol

Tip: Chemical formula is case sensitive. C10H16N2O2 c10h16n2o2

Instructions to calculate molar mass (molecular weight) of a chemical compound:

To calculate molar mass of a chemical compound, please enter its chemical formula and click 'Calculate'.

Definitions of molecular mass, molecular weight, molar mass and molar weight:

Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.

Molarity Calculator

Mass Concentration Volume Molecular Weight

Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

Handling Instructions

Tel: +1-832-582-8158 Ext:3

If you have any other enquiries, please leave a message.

  • * Indicates a Required Field

CaSR Signaling Pathway Map

Related CaSR Products

Tags: buy NPS-2143 | NPS-2143 supplier | purchase NPS-2143 | NPS-2143 cost | NPS-2143 manufacturer | order NPS-2143 | NPS-2143 distributor
Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID