The effect of alloxan diabetes on the activity of monoamine oxidase was studied in three regions of the rat brain at various time intervals after the onset of diabetes. It was observed that monoamine oxidase activity was decreased at early time intervals after diabetes, followed by a recovery in all three regions of the brain. A reversal of the effect was observed with insulin administration to...

Chloropromazine (CPZ) and imipramine at a concentration of 1 x 10(-3) M inhibit rat brain mitochondrial monoamine oxidase activity in vitro by 70 and 55% respectively, while lithium, even at a concentration of 0.05 M, inhibits the activity of this enzyme very negligibly (4%). In vivo, these drugs at a dose level of 56 mg CPZ, 76 mg imipramine and 76 mg lithium chloride/Kg body wt., did not caus...

The morphine-induced changes in the activity of enzymes involved in the metabolism of neurotransmitters in specific areas of the brain of rats made tolerant to morphine have been investigated. The activities of choline acetyl transferase (E.G.2.3.1.6.), acetylcholinesterase (E.C.3.1.1.7.) and monoamine oxidase (E.G. 1.4.3.4.) were determined in the hippocampus, thalamus, hypothalamus, cerebral ...

Monoamine Oxidase Inhibitors DEAR SIR, Dr Pare's article on †̃¿ The Present Status of Monoamine Oxidase Inhibitors' is one of a genre that marks the renaissance of these drugs (Murphy et al, 1984; White & Simpson, 1985). This is understandable given that the †̃¿ second generation' compounds are less exciting than hoped, that early use of phenelzine was often with inadequate dosage and that im...