A-839977 is a novel and selective P2X7 antagonist; blocks BzATP-evoked calcium influx at recombinant human, rat and mouse P2X7 receptors (IC50 values are 20, 42 and 150 nM respectively).IC50 Value: Target: P2X7in vitro: A-839977 potently (IC50=20-150 nM) blocked BzATP-evoked calcium influx at recombinant human, rat and mouse P2X7 receptors. A-839977 also potently blocked agonist-evoked YO-PRO uptake and IL-1beta release from differentiated human THP-1 cells [1]. in vivo: Systemic administration of A-839977 dose-dependently reduced thermal hyperalgesia produced by intraplantar administration of complete Freund's adjuvant (CFA) (ED50=100 micromol/kg, i.p.) in rats. A-839977 also produced robust antihyperalgesia in the CFA model of inflammatory pain in wild-type mice (ED50=40 micromol/kg, i.p.), but the antihyperalgesic effects of A-839977 were completely absent in IL-1alphabeta knockout mice [1].
Bullatine A (BLA), a diterpenoid alkaloid of the genus Aconitum, possesses anti-rheumatic, anti-inflammatory and anti-nociceptive effects. Bullatine A (BLA) is a potent P2X7 antagonist, inhibits ATP-induced cell death/apoptosis and P2X receptor-mediated inflammatory responses[1].Bullatine A attenuates pain hypersensitivity, regardless of the pain models employed[2].
A potent, selective, CNS-penetrant P2X7 antagonist with pKi of 9.1 and 7.9 for rat and huamn P2X7 channel, respectively; does not block calcium flux via human P2X1, P2X2, P2X3, P2X2/P2X3, and P2X4 at 10 uM; attenuates both ATP- and Bz-ATP-induced currents from hP2X7-1321N1 cells with similar potencies (pEC50=7.0), blocks the release of IL-1β induced by Bz-ATP in freely moving rat brain, also increases serotonin levels; attenuates amphetamine-induced hyperactivity in vivo.
GW791343 2Hcl is a P2X7 allosteric modulator; exhibits species-specific activity and acts as a negative allosteric modulator of human P2X7 (pIC50 = 6.9 - 7.2). IC50 value: 7 (pIC50)Target: P2X7 in vitro: In cells expressing human P2X7 receptors, GW 791343 inhibits agonist-stimulated ethidium accumulation in both sucrose and NaCl buffer. In NaCl buffer, GW 791343 reduces the maximal response to both ATP and BzATP, but there is little effect on agonist potency except for a decrease in the presence of 300–1000 nM GW 791343. GW 791343 also reduces maximal responses to ATP and BzATP in sucrose buffer, although this effect is more marked when using ATP as agonist. In sucrose buffer, GW 791343 produces a slight decrease in ATP potency at 300 nM. GW 791343 decreases BzATP potency at concentrations of 300 nM to 10 μM. A more marked increase in agonist effect is observed when using ATP as agonist in NaCl buffer with GW791343 increasing the pEC50 and maximal response to ATP at concentrations of 10 and 30 μM. In sucrose buffer, GW791343 also increases responses when using ATP as agonist [1]. GW791343 inhibits responses at the human–rat chimeric receptor in both sucrose and NaCl buffer. GW791343 increases responses to BzATP at the F95L mutant receptor [2]. GW791343 is a non-competitive antagonist and negative allosteric modulator at the human P2X7 receptor; however, GW 791343 also acts as a positive allosteric modulator at the rat P2X7 receptor [3]. At the dog P2X7 receptor, GW 791343 is an antagonist with similar potency to that determined at the human receptor [4].
Zeaxanthin dipalmitate (Physalien) is a wolfberry-derived carotenoid, has anti-inflammatory and anti-oxidative stress effects. Zeaxanthin dipalmitate directly interact with p2X7 receptor (Kd=81.2 nM) and adiponectin receptor 1 (AdipoR1; Kd=533 nM) in a positive dose-dependent manner. Zeaxanthin dipalmitate restores mitochondrial autophagy functions suppressed by ethanol intoxication. Zeaxanthin dipalmitate can be used in the research of alcoholic fatty liver disease (AFLD) and retinitis pigmentosa (RP)[1][2].
Oxidized ATP (oATP) trisodium salt is a broad-spectrum P2 receptor inhibitor. Oxidized ATP trisodium salt irreversibly antagonizes P2X7R activation. Oxidized ATP trisodium salt inhibits c-reactive protein (CRP)-induced NLRP3 inflammasome activation. Oxidized ATP trisodium salt can be used for research of atherosclerosis[1][2].
Camlipixant (BLU-5937) a potent, selective, non-competitive and orally active P2X3 homotrimeric receptor antagonist with an IC50 of 25 nM against hP2X3 homotrimeric. Camlipixant shows potent anti-tussive effect and no taste alteration. Camlipixant can be used for the research of unexplained, refractory chronic cough[1].
ATP is a phosphate-group donor for substrate activation in metabolic reactions and the coenzyme for a large number of kinases.
Purotoxin 1 is a P2X3 receptor inhibitor. Purotoxin 1 shows antinociceptive properties in animal models of inflammatory pain. Purotoxin 1 can be isolated from the venom of the wolf spider Geolycosa sp[1].