SAR110894, a potent histamine H3-receptor antagonist, displays procognitive effects in rodents

Guy Griebel*, Philippe Pichat, Marie Pierre Pruniaux, Sandra Beeské, Mati Lopez-Grancha, Elisabeth Genet, Jean Paul Terranova, Antonio Castro, Juan Antonio Sánchez, Mark Black, Geoffrey B. Varty, Ina Weiner, Michal Arad, Segev Barak, Amaya De Levie, Etienne Guillot

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

SAR110894 is a novel histamine H3-R ligand, displaying high and selective affinity for human, rat or mouse H3-Rs. SAR110894 is a potent H3-R antagonist at native receptors, reversing R-α-methylhistamine-induced inhibition of electrical field stimulation contraction in the guinea-pig ileum. Additionally, SAR110894 inhibited constitutive GTPγS binding at human H3-Rs demonstrating inverse agonist properties. In behavioral models addressing certain aspects of cognitive impairment associated with schizophrenia (CIAS) and attention deficit/hyperactivity disorder (ADHD), SAR110894 improved memory performances in several variants of the object recognition task in mice (0.3-3 mg/kg, p.o.) or rats (0.3-1 mg/kg, p.o.). Moreover, SAR110894 (1 mg/kg, p.o.) reversed a deficit in working memory in the Y-maze test, following an acute low dose of phencyclidine (PCP) (0.5 mg/kg, i.p.) in mice sensitized by repeated treatment with a high dose of PCP (10 mg/kg, i.p.). In the latent inhibition (LI) model, SAR110894 potentiated LI in saline-treated rats (1 and 3 mg/kg, i.p.) and reversed abnormally persistent LI induced by neonatal nitric oxide synthase (NOS) inhibition in rodents (0.3-3 mg/kg, i.p.). In a social novelty discrimination task in rats, SAR110894 attenuated selective attention deficit induced by neonatal PCP treatment (3 and 10 mg/kg, p.o.) or a parametric modification of the procedure (3 and 10 mg/kg, p.o.). SAR110894 showed efficacy in several animal models related to the cognitive deficits in Alzheimer's disease (AD). It prevented the occurrence of episodic memory deficit induced by scopolamine in rats (0.01-10 mg/kg, p.o.) or by the central infusion of the toxic amyloid fragment β25-35 in the object recognition test in mice (1 and 3 mg/kg, p.o.). Altogether, these findings suggest that SAR110894 may be of therapeutic interest for the treatment of the cognitive symptoms of AD, schizophrenia and certain aspects of ADHD.

Original languageEnglish
Pages (from-to)203-214
Number of pages12
JournalPharmacology Biochemistry and Behavior
Volume102
Issue number2
DOIs
StatePublished - Aug 2012

Keywords

  • Alzheimer's disease
  • Attention deficit/hyperactivity disorder
  • Cognitive impairment associated with schizophrenia
  • Histamine H receptor
  • Rodents

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