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New-New COMT study


In vivo effects of new inhibitors of catechol-O-methyl transferase
E Rivas, ML de Ceballos, O Nieto, JA Fontenla
British J Pharmacol 1999;126:1667-1673

A new nitrocatechol compound, QO IIR, is an effective, peripherally
acting, reversible inhibitor of COMT, according to this study.

Rats treated with reserpine to induce akinesia were given
intraperitoneal injections of either QO IIR, another new compound QO
IIA, or one of two known COMT inhibitors, nitecapone or R0-41-0960.
Levodopa/carbidopa was administered one hour later, and locomotor
activity was assessed one hour after that, recorded as total movement
counts per hour.

QO IIR, but not QO IIA, improved locomotor activity to a degree similar
to the two known COMT inhibitors. QO IIR was effective at doses ranging
from 11.25-30 mg/kg, with a drop off in effectiveness at higher doses.
--
Judith Richards, London, Ontario, Canada
<judithr@xxxxxxxx>
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