Title : Effect of MDL 73,745 on acetylcholine and biogenic amine levels in rat cortex - Zhu_1995_Eur.J.Pharmacol_276_93 |
Author(s) : Zhu XD , Giacobini E , Hornsperger JM |
Ref : European Journal of Pharmacology , 276 :93 , 1995 |
Abstract :
We postulate that the effect of cholinesterase inhibitors to ameliorate the cholinergic deficit in Alzheimer's disease is related to their ability to maintain long-lasting, non-toxic steady-state levels of acetylcholine in cortex. We investigated the effect of the cholinesterase inhibitor, MDL 73,745 (2,2,2-trifluoro-1-(3-trimethylsilylphenyl)ethanone), on the extracellular levels of acetylcholine, norepinephrine, dopamine and 5-hydroxytryptamine in the cerebral cortex of the rat by high-performance liquid chromatography coupled with electrochemical detection. The drug significantly increased acetylcholine levels above the baseline at 2 and 10 mg/kg s.c., but not at the 1 mg/kg dose. At both 2 and 10 mg/kg there was a good correlation between cholinesterase inhibition and acetylcholine increase in cortex. At the 2 and 10 mg/kg doses, the maximal cholinesterase inhibition was 64% and 77%, respectively, and the increase in acetylcholine release was 481% and 1016%, respectively. Norepinephrine and dopamine, but not 5-hydroxytryptamine levels, were also significantly increased by the 10 mg/kg dose. The increases of norepinephrine and dopamine levels reached a maximum of 124% and 370%, respectively, and continued for a period of at least 8 h. Cholinergic side-effects were most marked at the 10 mg/kg dose but were also noticeable at the 2 mg/kg dose in the form of fasciculations, tremor and splay. |
PubMedSearch : Zhu_1995_Eur.J.Pharmacol_276_93 |
PubMedID: 7781701 |
Inhibitor | Zifrosilone |
Zhu XD, Giacobini E, Hornsperger JM (1995)
Effect of MDL 73,745 on acetylcholine and biogenic amine levels in rat cortex
European Journal of Pharmacology
276 :93
Zhu XD, Giacobini E, Hornsperger JM (1995)
European Journal of Pharmacology
276 :93