RT Journal Article T1 A new serotonin 5-HT 6 receptor antagonist with procognitive activity - Importance of a halogen bond interaction to stabilize the binding A1 González Vera, Juan Antonio A1 Medina Muñoz, Rocío Almudena A1 Martín-Fontecha Corrales, María Del Mar A1 Gonzalez Wong, Ángel A1 Fuente Mendizábal, Tania de la A1 Vázquez Villa, María Del Henar A1 García Cárceles, Javier A1 Botta, Joaquín A1 McCormick, Peter J. A1 Benhamú Salama, Bellinda A1 Pardo Carrasco, Leonardo A1 López Rodríguez, María Luz AB Serotonin 5-HT 6 receptor has been proposed as a promising therapeutic target for cognition enhancement though the development of new antagonists is still needed to validate these molecules as a drug class for the treatment of Alzheimer's disease and other pathologies associated with memory deficiency. As part of our efforts to target the 5-HT 6 receptor, new benzimidazole-based compounds have been designed and synthesized. Site-directed mutagenesis and homology models show the importance of a halogen bond interaction between a chlorine atom of the new class of 5-HT 6 receptor antagonists identified herein and a backbone carbonyl group in transmembrane domain 4. In vitro pharmacological characterization of 5-HT 6 receptor antagonist 7 indicates high affinity and selectivity over a panel of receptors including 5-HT 2B subtype and hERG channel, which suggests no major cardiac issues. Compound 7 exhibited in vivo procognitive activity (1 mg/kg, ip) in the novel object recognition task as a model of memory deficit. PB Nature Publishing Group SN 2045-2322 YR 2017 FD 2017 LK https://hdl.handle.net/20.500.14352/18265 UL https://hdl.handle.net/20.500.14352/18265 LA eng NO received: 01 August 2016accepted: 16 December 2016Published: 24 January 2017 NO Ministerio de Economía y Competitividad (MINECO) NO Comunidad de Madrid NO European COST Action CM1207 (GLISTEN) DS Docta Complutense RD 18 dic 2025