Behavioral and neurochemical consequences of ibotenic acid lesion in the subthalamic nucleus of the common marmoset.

Published

Journal Article

Five marmosets were unilaterally lesioned within the subthalamic nucleus (STN) by injection of 10 micrograms ibotenic acid. Seven marmosets served as saline injected controls. The lesioned marmosets showed an increased locomotor activity, occasional tongue protrusions, posture asymmetry, and abnormal movements of the contralateral legs and arms. The animals were sacrificed 21 days after the ibotenic acid injection and markers of gamma-aminobutyric acid (GABA), dopamine (DA), and acetylcholine were studied in a variety brain regions. There was a bilateral increase in the activity of glutamic acid decarboxylase (GAD) in the caudate, putamen, globus pallidus, superior colliculus, and the ventral anterior/ventral lateral (VA/VL) thalamus, whereas GABA concentrations were only increased ipsilaterally in the ventral posterior medial/centromedial/parafasciculus (VPM/CM/Pf) complex of the thalamus. Tyrosine hydroxylase (TH) activity was bilaterally increased in the medial segment of globus pallidus and nucleus accumbens. However, there were also changes restricted to the side contralateral to the lesion. TH activity and DA concentrations were increased contralateral to the lesion in the putamen. Choline acetyltransferase (CAT) activity was bilaterally increased in the medial segment of globus pallidus and hypothalamus. The ibotenic acid induced STN-lesion in the marmoset, thus, seemed to cause a widespread bilateral activation of neurons within the basal ganglia.

Full Text

Duke Authors

Cited Authors

  • Andrén, PE; Levin, ED; Liminga, U; Gunne, L

Published Date

  • 1995

Published In

Volume / Issue

  • 36 / 3

Start / End Page

  • 301 - 307

PubMed ID

  • 7697384

Pubmed Central ID

  • 7697384

International Standard Serial Number (ISSN)

  • 0361-9230

Language

  • eng

Conference Location

  • United States