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Updated: Mar 17, 2026

Proteomics to Identify Proteins Interacting with P2X2 Ligand-Gated Cation Channels
Published on: May 18, 2009
New P2X3 receptor antagonists. Part 1: Discovery and optimization of tricyclic compounds
Gábor Szántó1, Attila Makó1, Imre Bata1
1Gedeon Richter Plc, Budapest 10, PO Box 27, H-1475, Hungary.
Abstract:
Purinergic P2X3 receptors are trimeric ligand-gated ion channels whose antagonism is an appealing yet challenging and not fully validated drug development idea. With the aim of identification of an orally active, potent human P2X3 receptor antagonist compound that can penetrate the central nervous system, the compound collection of Gedeon Richter was screened. A hit series of tricyclic compounds was subjected to a rapid, two-step optimization process focusing on increasing potency, improving metabolic stability and CNS penetrability. Attempts resulted in compound 65, a potential tool compound for testing P2X3 inhibitory effects in vivo.
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