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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Possible role of dopamine-beta-hydroxylase in the regulation of norepinephrine biosynthesis in rat brain.

In Experiment 1, the dose-response effects of three dopamine-beta-hydroxylase ( DBH) inhibitors (diethyldithiocarbamate, FLA-63 and U-14, 624) on the endogenous levels of norepinephrine and dopamine in pons-medulla of rat brain were determined. In Experiment 2, the effect of low doses of diethylithiocarbamate (2.5 to 120 mg/kg) on the level of norepinephrine-3H produced from dopamine-H3 was determined. The data obtained by extrapolation of the curves in both experiments provided an estimation of the in vivo level of DBH activity and suggested that it was not present in excess. Finally, in Experiment 3, the three DBH inhibitors reduced self-stimulation (a behavior dependent upon catecholamines) in a dose-related manner and intraventricular injections of 1-norepinephrine reinstated normal rates of self-stimulation. The results from the three experiments are consistent with the idea that DBH is involved in the regulation of norepinephrine biosynthesis. The relationship of this finding to our earlier report of a deficit of DBH in post-mortem brains of schizophrenics is discussed.[1]

References

  1. Possible role of dopamine-beta-hydroxylase in the regulation of norepinephrine biosynthesis in rat brain. Wise, C.D., Belluzzi, J.D., Stein, L. Pharmacol. Biochem. Behav. (1977) [Pubmed]
 
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