Publication: A new serotonin 5-HT 6 receptor antagonist with procognitive activity - Importance of a halogen bond interaction to stabilize the binding
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2017
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Nature Publishing Group
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Abstract
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.
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received: 01 August 2016
accepted: 16 December 2016
Published: 24 January 2017