Hammilton
Bluelighter
- Joined
- Sep 2, 2008
- Messages
- 3,435
4 MEO Mcat has been made, it can't enter the SE neuron and inhibit MAO due to the beta ketone, and thus carries no risk of SS.
Do you even understand what MAO is? It doesn't have to entry a neuron to inhibit MAO. MAO is a family of enzymes (duh, you can tell by the "ase" part in Oxidase). MAO-A is found in neurons and astrocyctes in the CNS, and in the periphery, it's found in the liver and gastro tract.
MAO-A is the MAO that breaks down SE and NE. Interestingly enough, of the beta-oxygen substitutents, the beta-ketone gives rise to a selective MAO-A inhibitor.
MAO inhibition by arylisopropylamines: the effect of oxygen substituents at the β-position
Mauricio Osorio-Olivaresa, Marcos Caroli Rezende, , a, Silvia Sepúlveda-Bozab, Bruce K. Casselsc and Angélica Fierroa
a Facultad de Química y Biología, Universidad de Santiago, Casilla 40, Correo 33, Santiago, Chile b Facultad de Ciencias Médicas, Universidad de Santiago, Casilla 442, Correo 2, Santiago, Chile c Millennium Institute for Advanced Studies in Cell Biology and Biotechnology and Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Santiago, Chile
Received 26 January 2004; Revised 17 May 2004; accepted 26 May 2004. Available online 22 June 2004.
Abstract
Twenty-nine arylisopropylamines, substituted at the β-position of their side chain by an oxo, hydroxy, or methoxy group, were evaluated in vitro as MAO-A and MAO-B inhibitors. The oxo derivatives (‘cathinones') were in general less active as MAO-A inhibitors than the corresponding arylisopropylamines, but exhibited an interesting MAO-B inhibiting activity, which was absent in the hydroxy, methoxy, and β-unsubstituted analogues. These results suggest that selective affinity for the two MAO isoforms in this family of compounds is modulated not only by the aryl substitution pattern but also by the side-chain substituents on the arylalkylamine scaffold.

