Inhibition of DT-diaphorase is a requirement for Mn(III) to produce a 6-OH-dopamine like rotational behaviour.
Intracerebral manganese administration together with the DT-diaphorase inhibitor dicoumarol [Mn(III) 40 nmol + -dicoumarol 2 nmol; in 4 micro l] into the left medial forebrain bundle (MFB) produced a behavioural pattern characterized by contralateral behaviour when the rats were stimulated with apomorphine (0.5 mg/kg s.c.), in a manner similar to that when administered to unilaterally 6-hydroxy-dopamine-lesioned animals. The same animals rotated towards the opposite side (ipsilaterally) when stimulated with d-amphetamine (2 mg/kg s.c.). These results support the idea that DT-diaphorase plays a protective role in the dopaminergic systems.
Segura-Aguilar
J
J
Faculty of Medicine, Program of Molecular and Clinical Pharmacology, ICBM, University of Chile, Avd. Independencia 1027, Cassila 70000, Santiago-7, Chile.
Diaz-Veliz
G
G
Mora
S
S
Herrera-Marschitz
M
M