| Description | BX430 is used for chronic pain and cardiovascular disease and it is a potent and selective noncompetitive allosteric human P2X4 receptor channels antagonist with an IC50 of 0.54 μM. BX430 has species specificity. |
| In vitro | BX430, with submicromolar potency (IC50 = 0.54 M). BX430 is highly selective, having virtually no functional impact on all other P2X subtypes, namely, P2X1-P2X3, P2X5, and P2X7, at 10-100 times its IC50.?Unexpected species differences were noticed, as BX430 is a potent antagonist of zebrafish P2X4 but has no effect on rat and mouse P2X4 orthologs.?The concentration-response curve for ATP on human P2X4 in the presence of BX430 shows an insurmountable blockade, indicating a noncompetitive allosteric mechanism of action.?Using a fluorescent dye uptake assay, we observed that BX430 also effectively suppresses ATP-evoked and ivermectin-potentiated membrane permeabilization induced by P2X4 pore dilation.?Finally, in single-cell calcium imaging, we validated its selective inhibitory effects on native P2X4 channels at the surface of human THP-1 cells that were differentiated into macrophages.?In summary, this ligand provides a novel molecular probe to assess the specific role of P2X4 in inflammatory and neuropathic conditions, where ATP signaling has been shown to be dysfunctional[1]. |
| Target activity | P2X4 receptor (human):0.54 μM |
| molecular weight | 413.11 |
| Molecular formula | C15H15Br2N3O |
| CAS | 688309-70-8 |
| Storage | Powder: -20°C for 3 years | In solvent: -80°C for 1 year |
| Solubility | DMSO: 30 mg/mL (72.62 mM) |
| References | 1. Ase AR, et al. Identification and characterization of a selective allosteric antagonist of human P2X4 receptor channels. Mol Pharmacol. 2015 Apr;87(4):606-16. 2. Sophocleous RA, et al. Pharmacological and genetic characterisation of the canine P2X4 receptor. Br J Pharmacol. 2020 Feb 4. |