P2X7 receptor antagonist-3 is a potent P2X7 receptor antagonist with P2X7R IC50 values of 4.2 nM in humans and 6.8 nM in rats[1].
A-317491 is a non-nucleotide P2X3 and P2X2/3 receptor antagonist, which inhibits calcium flux mediated by the receptors. IC50 value: Target: P2X2/3It is known that P2X3 and P2X2/3 receptors stimulate the pronociceptive effects of ATP upon activation. Studies indicate that the P2X3 receptor is implicated in both neuropathic and inflammatory pain. P2X3 receptor is a promising target for therapeutic intervention in cancer patients for pain management.
MRS4719 is a potent P2X4 receptor antagonist with an IC50 value of 0.503 μM for human P2X4 receptor. MRS4719 can reduce infarct volume and reduce brain atrophy, showing neuroprotective and neuro-rehabilitative activities in ischemic stroke model. MRS4719 also reduces ATP-induced [Ca2+]i influx in primary human monocyte-derived macrophages. MRS4719 can be used to research ischemic stroke[1].
NF449 octasodium is a highly potent P2X1 receptor antagonist, with IC50s of 0.28, 0.69, and 120 nM for rP2X1, rP2X1+5, P2X2+3, respectively. NF449 octasodium is a Gsα-selective G Protein antagonist. NF449 octasodium suppresses the rate of GTP[γS] binding to Gsα-s, inhibits the stimulation of adenylyl cyclase activity, and blocks the coupling of β-adrenergic receptors to Gs[1][2].
NF864, a suramin analog, is a P2X1 receptor inhibitor.
Lu AF27139 is a novel rodent-active and CNS-penetrant P2X7 receptor antagonist. Lu AF27139 is highly selective and potent against rat, mouse, and human forms of the receptors. The rat pharmacokinetic profile is favorable with high oral bioavailability, modest clearance (0.79 L/(h kg)), and good CNS permeability. Importantly, Lu AF27139 was without effect in standard in vitro and in vivo toxicity studies. Lu AF27139 is a valuable tool for probing the role of the P2X7 receptor in rodent models of CNS diseases.
NF279 is a potent selective and reversible P2X1 receptor antagonist, with an IC50 of 19 nM. NF279 displays good selectivity over P2X2, P2X3 (IC50=1.62 μM), P2X4 (IC50>300 μM). NF279 is a dual HIV-1 coreceptor inhibitor that interferes with the functional engagement of CCR5 and CXCR4 by Env[1][2].
P2X3 antagonist 34 is a potent, selective and orally active P2X3 homotrimeric receptor antagonist with IC50s of 25 nM, 92 nM and 126 nM for human P2X3, rat P2X3 and guinea pig P2X3 receptors, respectively. P2X3 antagonist 34 is less active against human, rat and guinea pig P2X2/3 heterotrimeric receptors. P2X3 antagonist 34 has strong anti-tussive effect[1].
NF023 hexasodium is a selective and competitive P2X1 receptor antagonist, with IC50 values of 0.21 μM, 28.9 μM, > 50 μM and > 100 μM for human P2X1, P2X3, P2X2, and P2X4-mediated responses respectively[1][2][3][4].
8-Bromo-ATP (8-Bromoadenosine 5'-triphosphate), an ATP analogue, is a purinergic P2X receptor agonist. 8-Bromo-ATP shows cytotoxic to multiple myeloma cells with an IC50 of 23.1 μM[1][2][3].
PPADS tetrasodiuma is a non-selective P2X receptor antagonist. PPADS tetrasodiuma blocks recombinant P2X1, -2, -3, -5 with IC50s ranging from 1 to 2.6 μM. PPADS tetrasodiuma blocks native P2Y2-like (IC50~0.9 mM) and recombinant P2Y4 (IC50~15 mM) receptors. PPADS tetrasodiuma is an inhibitor of the reverse mode of the Na/Ca²⁺exchanger in guinea pig airway smooth muscle[1][2].
AF-353 is a novel, potent and orally bioavailable P2X3/P2X2/3 receptor antagonist, inhibits human and rat P2X3 (pIC50= 8.0).IC50 value: pIC50 = 8.0 (pIC50, for P2X3)Target: P2X3/P2X2/3 receptorin vitro: AF-353 is a highly potent inhibitor of α,β-meATP-evoked intracellular calcium flux in cell lines expressing recombinant rat and human P2X3 and human P2X2/3 channels. AF-353 also blocks human P2X2/3 channel function with marginally reduced potency (pIC50 = 7.3). [1]in vivo: SCI rats has significantly higher frequencies for field potentials and NVC than NL rats. Intravesical ATP increases field potential frequency in control but not SCI rats, while systemic AF-353 significantly reduces this parameter in both groups. AF-353 also reduces the inter-contractile interval in control but not in SCI rats; however, the frequency of NVC in SCI rats was significantly reduced.[2]
5-BDBD, a potent and selective P2X4 receptor antagonist, inhibits rP2X4R-mediated currents, with an IC50 of 0.75 μM. 5-BDBD completely blocks the basal and acute hyperalgesia induced by nitroglycerin (NTG)[1][2].
JNJ-47965567 is a potent, selective, centrally permeable P2X7 receptor antagonist with pKi of 7.9 and 8.7 for human and rat P2X7, respectively; attenuates IL-1β release with pEC50 of 6.7 (human blood), 7.5 (human monocytes) and 7.1 (rat microglia); exhibits target engagement in rat brain with brain EC50 of 78 ± 19 ng/ml, as well as functional block of Bz-ATP induced IL-1β release; attenuateas amphetamine-induced hyperactivity and exhibits modest, yet significant efficacy in the rat model of neuropathic pain.
Sivopixant (S-600918) is a potent and selective P2X3 receptor antagonist (P2X3 IC50=4.2 nM; P2X2/3 IC50=1100 nM). Sivopixant shows strong analgesic effect[1].
Iso-PPADS tetrasodium is a P2X-purinoceptor antagonist. Iso-PPADS tetrasodium inhibits P2X1 and P2X3 receptor with IC50s of 43 nM and 84 nM. Iso-PPADS tetrasodium is protective against ventilator-induced brain injury (VIBI)[1][2].
TNP-ATP triethylammonium is a selective P2X receptor antagonist. TNP-ATP triethylammonium shows antinociceptive effects in rats[1].
NP-1815-PX is a potent and selective P2X4R antagonist. NP-1815-PX has anti-inflammatory activity, and can relieve pain in chronic pain models. NP-1815-PX also inhibits guinea pig tracheal/bronchial smooth muscle (TSM and BSM) contractions[1][2][3].
P2X7-IN-2 (compound 58) is a P2X7 receptor inhibitor. P2X7-IN-2 inhibits IL-Iβ release with an IC50 value of 0.01 nM. P2X7-IN-2 can be used for the research of autoimmunity, inflammation and cardiovascular disease[1].
A 438079 (hydrochloride) is a potent, and selective P2X7 receptor antagonist with pIC50 of 6.9.
Eliapixant (BAY 1817080) is a potent and selective antagonist of P2X3 receptor, with an IC50 of 8 nM. Eliapixant can be used for the research of refractory chronic cough[1][2].
KN-62 is a selective and potent inhibitor of calmodulin-dependent protein kinase II (CaMK-II) with IC50 of 0.9 μM, KN-62 also displays noncompetitive antagonism at P2X7 receptors in HEK293 cells, with an IC50 value of approximately 15 nM.
Minodronic acid (YM-529) is a third-generation bisphosphonate that directly and indirectly prevents proliferation, induces apoptosis, and inhibits metastasis of various types of cancer cells. Minodronic acid (YM-529) is an antagonist of purinergic P2X2/3 receptors involved in pain[1][2].
P2X3 antagonist 37 is a potent P2X3 receptor antagonist with an IC50 of 32.45 nM for hP2X3 (WO2021115225A1, example 68)[1].
P2X3 antagonist 36 is a P2X3 antagonist extracted from patent WO2019081343A1 compound 156[1].
RO-3 is a potent, CNS-penetrant, and orally active P2X3 and P2X2/3 antagonist with pIC50s of 5.9 and 7.0 for human homomultimeric P2X3 and heteromultimeric P2X2/3 receptors, respectively. RO-3 shows selectivity for P2X3 and P2X2/3 over all other functional homomultimeric P2X receptors (IC50 >10 μM at P2X1,2,4,5,7)[1].
Oxatomide is a potent and orally active dual H1-histamine receptor and P2X7 receptor antagonist with antihistamine and anti-allergic activity. Oxatomide almost completely blocks the ATP-induced current in human P2X7 receptors (IC50 of 0.95 μM). Oxatomide inhibits ATP-induced Ca2+ influx with an IC50 value of 0.43 μM and also inhibits serotonin[1][2].
P2X7 receptor antagonist-2 is a potent P2X7 receptor antagonist with a pIC50 value of 6.5-7.5. P2X7 receptor antagonist-2 has efficacy of combating neuroinflammation[1].
Ro 0437626 is a selective purinergic (P2X1) receptor antagonist (IC50 = 3 μM), but shows low affinity for P2X2, P2X3 and P2X2/3 receptors (IC50 > 100 μM)[1].
Gefapixant citrate is an orally active and potent purinergic P2X3 receptor (P2X3R) antagonist, with IC50 values of ~30 nM versus recombinant hP2X3 homotrimers and 100-250 nM at hP2X2/3 heterotrimeric receptors. Gefapixant citrate can be used for the research of chronic cough and knee osteoarthritis[1][2][3].