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].
Taspine is a natural product with anti-inflammatory activity. Taspine suppresses P2X4 receptor activity via PI3K inhibition. Taspine inhibits pro-inflammatory signalling via inhibition of P2X4 receptors in macrophage[1].
Aurintricarboxylic acid is a nanomolar-potency, allosteric antagonist with selectivity towards αβ-methylene-ATP-sensitive P2X1Rs and P2X3Rs, with IC50s of 8.6 nM and 72.9 nM for rP2X1R and rP2X3R, respectively[1]. Aurintricarboxylic acid is a potent anti-influenza agent by directly inhibiting the neuraminidase[2]. Aurintricarboxylic acid is an inhibitor of topoisomerase II and apoptosis[3]. Aurintricarboxylic acid is a selective inhibitor of the TWEAK-Fn14 signaling pathway[4].
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].
PSB-12062 is a potent and selective P2X4 antagonist with an IC50 of 1.38 μM for human P2X4.
PPNDS tetrasodium is a selective and competitive meprin β inhibitor (IC50: 80 nM, Ki: 8 nM), and also inhibits ADAM10 (IC50: 1.2 μM). PPNDS tetrasodium is also a P2X1 receptor antagonist. PPNDS is an agonist for the ATP receptor of Paramecium. PPNDS tetrasodium potently inhibits polymerases from viruses. PPNDS tetrasodium can be used in the research of infection and cancers[1][3][4].
AZ10606120 dihydrochloride is a selective, high affinity antagonist for P2X7 receptor (P2X7R) at human and rat with an IC50 of ~10 nM. AZ10606120 dihydrochloride is little or no effect at other P2XR subtypes. AZ10606120 dihydrochloride has anti-depressant effects and reduces tumour growth[1].
Lappaconitine, isolated from Aconitum sinomontanum Nakai, was characterized as analgesic principle.IC50 value:Target:In vitro: In vivo: Lappaconitine was characterized as analgesic principle by our laboratory. The results suggest that lappaconitine can produce analgesia, possibly through a decrease in cellular calcium availability and PAG may be involved in the Ca2+ antagonistic effect on lappaconitine analgesia [1]. Changes in lappaconitine levels in blood, brain and spinal cord following subcutaneous (s.c.) injection were correlated with the analgesic activity at intervals up to 90 minutes after injection. The equianalgesic doses of lappaconitine (ED50 by the s.c. route and additive ED50 by the i.c.v. plus i.t. route) gave closely similar concentrations of the drug in brain and spinal cord. These results indicate that a simultaneous action of lappaconitine on supraspinal and spinal sites is likely to be important for the analgesia produced by systemically administered lappaconitine [2].
Opiranserin (VVZ-149, VVZ-000149) is a potent, selective, mixed glycine GlyT2 transporter blocker (IC50= 0.86 uM), purine P2X3 receptor antagonist (IC50=0.87 uM) and serotonin 5-HT2A receptor antagonist (IC50=1.3 uM); demonstrates analgesic efficacy for postoperative pain. Pain Phase 2 Clinical
P2X3-IN-1 (example 7) is an inhibitor of P2X3 receptor. P2X3-IN-1 can be used for neurogenic diseases research[1].
Blue FPG-A trisodium is a selective antagonist of P2X1 receptor and P2Y1 receptor with IC50 values of 35.5 μM and 2.6 μM, respectively. Blue FPG-A trisodium is a structural isomer of the components of Reactive Blue 2 (RB2)[1].
BX430 is a potent and selective noncompetitive allosteric human P2X4 receptor channels antagonist with an IC50 of 0.54 μM. BX430 has species specificity. BX430 is used for chronic pain and cardiovascular disease.
A-804598 is a novel, competitive, and selective P2X7 receptor antagonist with IC50 of 10 nM, 9 nM and 11 nM in rat, mouse and human P2X7 receptors respectively.In vitro: A-804598 potently blocked IL-1β release in the THP-1 cells (IC50 of 8.5 nM). A-804598 also blocked agonist-evoked pore formation in differentiated human THP-1 cells (IC50 of 8.1 nM) with similar potency as in the calcium-influx assay. [1]In vivo: Autoradiographic analysis of coronal rat brain sections revealed that there was specific binding of [3H]-A-804598 throughout the rat brain. High levels of [3H]-A-804598 specific binding were also found in the grey matter of the L4-L6 region of the rat spinal cord. [2]
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].
JNJ-54175446 is a potent and selective brain penetrant P2X7 receptor antagonist, with pIC50s of 8.46 and 8.81 for hP2X7 receptor and rP2X7 receptor, respectively.
NF864, a suramin analog, is a P2X1 receptor inhibitor.
GW791343 3Hcl 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].
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.
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].
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].
P2X3 antagonist 38 (compound 4) is a potent and orally active P2X3 antagonist with IC50 values of 0.132, 0.165, 0.421 µM for hP2X3, rP2X3, gpP2X3, respectively[1].
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]
BAY-1797 is a potent, orally active, and selective P2X4 antagonist, with an IC50 of 211 nM against human P2X4. BAY-1797 displays no or very weak activity on the other P2X ion channels. BAY-1797 shows anti-nociceptive and anti-inflammatory effects[1].
Opiranserin (VVZ-149) hydrochloride, a non-opioid and non-NSAID analgesic candidate, is a dual antagonist of glycine transporter type 2 (GlyT2) and serotonin receptor 2A (5HT2A), with IC50s of 0.86 and 1.3 μM, respectively. Opiranserin hydrochloride shows antagonistic activity on rP2X3 (IC50=0.87 μM). Opiranserin hydrochloride is development as an injectable agent for the treatment of postoperative pain[1][2][3].
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].