BAY-1797 is an orally active and selective P2X4 antagonist (IC50: 211 nM against human P2X4) with anti-nociceptive and anti-inflammatory effects. BAY-1797 displays no or very weak activity on the other P2X ion channels.
Target activity
human P2X7:10.6 μM , human P2X4:211 nM , human P2X23:>30 μM , human P2X1:>50 μM , human P2X3:8.3 μM
In vitro activity
BAY-1797 inhibits human, mouse, and rat P2X4 in 1321N1 cells (IC50s: 108 nM, 112 nM, and 233 nM). BAY-1797 exerts no measurable activity on hERG and carbonic anhydrase II (both IC50>10 μM). BAY-1797 (10 μM) is also tested against a panel of off-targets, including GPCRs, ion channels, kinases, and transporters. Inhibitory activity against the dopamine transporter (IC50: 2.17 μM) was revealed as the only hit.
In vivo activity
BAY-1797 (12.5-50 mg/kg; p.o.) shows a significant induction of PGE2 levels in the inflamed paw in the mouse Complete Freund’s Adjuvant (CFA) inflammatory pain model. BAY-1797 (50 mg/kg; once daily for multiple p.o.) induces a significant reduction of the ipsilateral paw load 24 and 48 h after CFA injection. BAY-1797 treatment shows the AUCnorm, Vss, and t1/2 are 1.06 kg h/L, 3.67 L/kg, and 2.64 hours, respectively.
1.Werner S, Mesch S, Hillig RC, Ter Laak A, Klint J, Neagoe I, Laux-Biehlmann A, Dahllöf H, Bräuer N, Puetter V et al.. (2019) Discovery and Characterization of the Potent and Selective P2X4 Inhibitor N-[4-(3-Chlorophenoxy)-3-sulfamoylphenyl]-2-phenylacetamide (BAY-1797) and Structure-Guided Amelioration of Its CYP3A4 Induction Profile.. J Med Chem, 62 (24):(11194-11217). [PMID:31746599]
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