Add time:09/28/2019 Source:infona.pl
Nine novel β- and γ-carboline derivatives bearing either methyl-, propargyl- or phenethyl-residues at the indole nitrogen were synthesized and tested as potential anti-Alzheimer drugs. Antagonism of recombinantly expressed NMDA receptors, inhibition of cholinesterases, and radical scavenging properties were determined for all compounds. Some were additionally tested in vivo for their ability to reverse scopolamine-induced cognitive impairment in an 8-arm radial maze experiment with rats. For the most promising candidates, the interaction with muscarinic M 1 receptors was also investigated. With this set of compounds assays the influence of the scaffold itself and the substituents can be investigated separately. 5-Methyl-γ-carboline (6) was the most potent (0.25 μmol/100 g b.w.) compound in the in vivo test and might be a good starting point for the development of novel anti-Alzheimer drugs.
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