Effects of bis(7)-tacrine, a novel anti-Alzheimer's agent, on rat brain AChE.
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Wang H, Carlier PR, Ho WL, Wu DC, Lee NT, Li CP, Pang YP, Han YF
Effects of bis(7)-tacrine, a novel anti-Alzheimer's agent, on rat brain AChE.
Neuroreport. 1999 Mar 17;10(4):789-93.
- PubMed ID
- 10208549 [ View in PubMed]
- Abstract
The anticholinesterase effects of bis(7)-tacrine were compared with tacrine in vitro and in vivo. Based on IC50 ratios, the dimeric analog bis(7)-tacrine was, in a reversible manner, up to 150-fold more potent and 250-fold more selective than tacrine for acetylcholinesterase (AChE) over butyrylcholinesterase (BChE). Following a single oral administration, both bis(7)-tacrine and tacrine produced dose-dependent inhibitions of AChE in rat brain, but bis(7)-tacrine exhibited higher efficacy and AChE/BChE selectivity than tacrine. The anti-AChE efficacy of bis(7)-tacrine was quite similar following an oral or i.p. administration, but tacrine showed much lower efficacy when administered orally than when given i.p. These findings suggest bis(7)-tacrine, a highly potent and selective inhibitor of AChE, can probably be used as an improved drug in the palliative treatment of AD.
DrugBank Data that Cites this Article
- Drug Targets
Drug Target Kind Organism Pharmacological Action Actions Tacrine Acetylcholinesterase Protein Humans YesInhibitorDetails