In order to assess whether the protective effect is related to the inhibition of the MAO-A or due to another mechanism, the effect of Brofaromine (CGP 11305A, BRO) is determined on the activity of MAO-A in cultured cortical cells. It shows, firstly, that cultured cortical cells have a significant MAO-A activity, and secondly, that Brofaromine inhibits the enzyme in a concentration-dependent manner. The IC 50 is 0.19 μM for Brofaromine . Hill coefficient is 0.96. The enzyme is almost completely inhibited at 10 μM . Brofaromine inhibits MAO-A activity of our cultured cortical cells in a concentration-dependent manner. The IC 50 range of Brofaromine is 0.01 μM to 0.1 μM.
