Monoamine neurotransmitters in diffuse reversible forebrain ischemia and early recirculation: increased dopaminergic activity.

Abstract:

:Regional levels of brain monoamines and their metabolites were examined in a rat model of reversible and diffuse forebrain ischemia with and without reperfusion. During ischemia, blood flow decreased by 87 to 95%, but recovered to control values during recirculation. Norepinephrine and serotonin decreased in the cerebral cortex and hippocampus during ischemia and diminished further during recirculation. On the other hand, dopamine and its metabolites, 3,4-dihydroxyphenylacetic acid and homovanillic acid, which were not much affected by ischemia, increased markedly in the cerebral cortex and striatum during recirculation, with a decrease in the ratio of dopamine to its metabolites. These results suggest central dopaminergic hyperactivity during recirculation, which may be related to the selective vulnerability of the striatum in similar models of reversible forebrain ischemia.

journal_name

Neurology

journal_title

Neurology

authors

Harik SI,Yoshida S,Busto R,Ginsberg MD

doi

10.1212/wnl.36.7.971

subject

Has Abstract

pub_date

1986-07-01 00:00:00

pages

971-6

issue

7

eissn

0028-3878

issn

1526-632X

journal_volume

36

pub_type

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