Publications

Latest publication 10/10/2008

The novel inhibitor of the heterotrimeric G-protein complex- BIM-46187- elicits

BIM-46187 (7-[2-amino-1-oxo-3-thio-propyl]-8-cyclohexylmethyl-2-phenyl-5,6,7,8-tetrahydro-imidazo-[1,2a]-pyrazine dimer, hydrochloride) is an...

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    [title] => The novel inhibitor of the heterotrimeric G-protein complex- BIM-46187- elicits 
    [paragraph] => The novel inhibitor of the heterotrimeric G-protein complex, BIM-46187, elicits anti-hyperalgesic properties and synergizes with morphine.
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Authors
C. Favre-Guilmard, H. Zeroual-Hider, C. Soulard, C. Touvay, P.-E. Chabrier et al.

 Lab
Ipsen-Institut Henri Beaufour, Les Ulis, France.
Journal
European Journal of Pharmacology
Abstract
BIM-46187 (7-[2-amino-1-oxo-3-thio-propyl]-8-cyclohexylmethyl-2-phenyl-5,6,7,8-tetrahydro-imidazo-[1,2a]-pyrazine dimer, hydrochloride) is an inhibitor of the heterotrimeric G-protein complex signalling. Since many mediators of pain act through G-protein coupled receptors, the anti-hyperalgesic effects of BIM-46187 were assessed on experimental models of pain. In addition since opioids are widely used in pain management and act through specific G-protein-coupled receptors, the effects of BIM-46187 on the analgesic properties of morphine have also been investigated. BIM-46187 elicited a dose dependent analgesic effect in the models of carrageenan-induced hyperalgesia (0.1–1 mg/kg; i.v.) and chronic constriction injury (0.3–3 mg/kg; i.v.) in rats. BIM-46187, however, up to 10 mg/kg did not modify the paw oedema induced by carrageenan excluding an anti-inflammatory effect. In addition, at these doses, the compound was not sedative as shown by the lack of effect on the motor performance in the rotarod test. The combination of BIM-46187 and morphine (ratio 1/1) resulted in an unexpected synergistic effect in the model of carrageenan-induced hyperalgesia and in the chronic constriction injury model in rats when evaluated by isobolographic analysis. This synergy allowed a reduction of at least 20 fold in the dose of each compound. Conversely, the drug combination did not increase the side effects of morphine as assessed in the rotarod test. In conclusion, BIM-46187 elicits a potent anti-hyperalgesic effect and strongly synergizes with morphine. This work highlights the role of heterotrimeric G-protein complexes in pain and supports further investigations of the use of BIM-46187 alone, or in combination with low doses of morphine, in the management of pain.
BIOSEB Instruments Used
Aron Test or Four Plates Test (LE830),Rotarod (BX-ROD)

Keywords/Topics
General pain; Pharmacology; Pain; Cross-disciplinary subjects 
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