1. Academic Validation
  2. From High-Throughput Screening to Target Validation: Benzo[ d]isothiazoles as Potent and Selective Agonists of Human Transient Receptor Potential Cation Channel Subfamily M Member 5 Possessing In Vivo Gastrointestinal Prokinetic Activity in Rodents

From High-Throughput Screening to Target Validation: Benzo[ d]isothiazoles as Potent and Selective Agonists of Human Transient Receptor Potential Cation Channel Subfamily M Member 5 Possessing In Vivo Gastrointestinal Prokinetic Activity in Rodents

  • J Med Chem. 2021 May 13;64(9):5931-5955. doi: 10.1021/acs.jmedchem.1c00065.
Alessio Barilli 1 Laura Aldegheri 1 Federica Bianchi 1 Laurent Brault 1 Daniela Brodbeck 1 Laura Castelletti 1 Aldo Feriani 1 Iain Lingard 1 Richard Myers 2 Selena Nola 1 Laura Piccoli 1 Daniela Pompilio 1 Luca F Raveglia 1 Cristian Salvagno 1 Sabrina Tassini 1 Caterina Virginio 1 Mark Sabat 2
Affiliations

Affiliations

  • 1 Aptuit, an Evotec Company, Via Alessandro Fleming, 4, Verona 37135, Italy.
  • 2 Takeda Pharmaceuticals, 9625 Towne Centre Drive, San Diego, California 92121, United States.
Abstract

Transient receptor potential cation channel subfamily M member 5 (TRPM5) is a nonselective monovalent cation channel activated by intracellular CA2+ increase. Within the gastrointestinal system, TRPM5 is expressed in the stoma, small intestine, and colon. In the search for a selective agonist of TRPM5 possessing in vivo gastrointestinal prokinetic activity, a high-throughput screening was performed and compound 1 was identified as a promising hit. Hit validation and hit to lead activities led to the discovery of a series of benzo[d]isothiazole derivatives. Among these, compounds 61 and 64 showed nanomolar activity and excellent selectivity (>100-fold) versus related cation channels. The in vivo drug metabolism and pharmacokinetic profile of compound 64 was found to be ideal for a compound acting locally at the intestinal level, with minimal absorption into systemic circulation. Compound 64 was tested in vivo in a mouse motility assay at 100 mg/kg, and demonstrated increased prokinetic activity.

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