Abstract

The increasing worldwide prevalence of obesity creates a need for novel antiobesity treatments having outcomes superior to current drugs [1]. Modulation of CNS histaminergic activity represents a new mechanism because blocking postsynaptic H1 receptors induces weight gain [2], while H3 antagonists cause weight loss or prevent weight gain [1, 3–5]. Imidazole-based H3 antagonists may inhibit drug metabolism, potentially instigating undesirable drug-drug interactions [6]. Therefore, we evaluated the non-imidazolebased H3 antagonist A-331440 ({4¢-[3-(3(R)-(dimethylamino)-pyrrolidin-1-yl)-propoxy]-biphenyl-4-carbonitrile}, Fig. 1 [7]) in diet-induced or genetic (ob/ob) mouse obesity models. Inflamm. res. 53, Supplement 1 (2004) S47–S48 1023-3830/04/01S47-02 DOI 10.1007/s00011-003-0322-5

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