Elagolix Sodium

For research use only.

Catalog No.S4896 Synonyms: NBI-56418, ABT-620

Elagolix Sodium Chemical Structure

Molecular Weight(MW): 653.57

Elagolix Soidum is a potent, selective, orally active, non-peptide antagonist of the gonadotropin-releasing hormone receptor (GnRHR) with Kd value of 54 pM. Concentration at 10 μM shows no significant activity on ion channels, enzymes, and transporters (inhibition <50%).

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Biological Activity

Description Elagolix Soidum is a potent, selective, orally active, non-peptide antagonist of the gonadotropin-releasing hormone receptor (GnRHR) with Kd value of 54 pM. Concentration at 10 μM shows no significant activity on ion channels, enzymes, and transporters (inhibition <50%).
Targets
GnRHR [1]
(Cell-free assay)
54 pM(Kd)
In vitro

Elagolix displays high affinity in a competition binding assay for hGnRH-R (Ki = 0.90 nM) and low CYP3A4 inhibition (IC50 = 56 μM). It is a slowly disassociating antagonist exhibiting very high affinity (KD = 54 pM) and insurmountable antagonism. Elagolix is highly selective at hGnRH-R, its wider receptor selectivity is tested at a concentration of 10 μM in a panel of radioligand binding assays for 100 off-target receptors, ion channels, enzymes, and transporters, and significant activity is not observed (inhibition <50%). It does not stimulate histamine release from cultured rat peritoneal mast cells. Elagolix lacks the necessary high binding affinity to the rat GnRH receptor (Ki = 4400 nM) and it possesses high affinity at the monkey GnRH receptor (Ki = 3.3 nM)[1].

In vivo Oral administration of Elagolix suppresses luteinizing hormone in castrated macaques. Elagolix shows good efficacy in suppressing luteinizing hormone in monkeys and exhibits high oral bioavailability in dogs (~100% when dosed via oral gavage at 50 mg/kg)[1].

Protocol

Cell Research:

[1]

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  • Cell lines: RBL-1 cells stably expressing the human cloned GnRH receptor
  • Concentrations: --
  • Incubation Time: 1 h
  • Method:

    RBL-1 cells stably expressing the human cloned GnRH receptor are seeded into 96 well plates at a density of 15 000 cells per well in inositol-free DMEM containing 10% dialyzed FBS, 10 mM HEPES, 2 mM L-glutamine, 1 mM sodium pyruvate, 0.1 mM nonessential amino acids, and 50 μg/mL penicillin/streptomycin and are labeled for 48 h with 0.2 μCi myo-2-[3H]inositol. The cells are washed once in PBS and pretreated with assay buffer (140 mM NaCl, 4 mM KCl, 20 mM HEPES, 8.3 mM glucose, 1 mM MgCl2, 1 mM CaCl2, 10 mM LiCl, and 0.1% BSA) for 15-60 min at 37 °C. The cells are then stimulated with GnRH (6 nM) in the presence or absence of antagonist and incubated for 60 min at 37℃. Cells are extracted with 10 mM formic acid at 4℃ for 30 min, and the lysate is loaded onto Millipore plates containing 20 μg of Dowex AG1-X8 resin. The plate is washed once in H2O and once in 60 mM ammonium formate/5 mM sodium tetraborate, and inositol phosphates are eluted with 1 M ammonium formate/0.1 M formic acid. The eluate is transferred to a Lumaplate and counted in a TopCount NXT.


    (Only for Reference)
Animal Research:

[1]

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  • Animal Models: Rhesus Monkey
  • Dosages: 10 and 50 mg/kg (oral); 3 and 10 mg/kg (i.v.)
  • Administration: p.o. or i.v.
    (Only for Reference)

Solubility (25°C)

In vitro DMSO 100 mg/mL (153.0 mM)
Water 100 mg/mL (153.0 mM)
Ethanol 100 mg/mL (153.0 mM)

* 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 653.57
Formula

C32H29F5N3O5.Na

CAS No. 832720-36-2
Storage powder
in solvent
Synonyms NBI-56418, ABT-620
Smiles [Na+].COC1=C(F)C(=CC=C1)C2=C(C)N(CC3=C(F)C=CC=C3C(F)(F)F)C(=O)N(CC(NCCCC([O-])=O)C4=CC=CC=C4)C2=O

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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.

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID