INTRASTRIATAL AND INTRASUBTHALAMIC STIMULATION OF METABOTROPIC GLUTAMATE RECEPTORS - A BEHAVIORAL AND FOS IMMUNOHISTOCHEMICAL STUDY

被引:60
作者
KAATZ, KW
ALBIN, RL
机构
[1] UNIV MICHIGAN,DEPT NEUROL,ANN ARBOR,MI 48109
[2] UNIV MICHIGAN,PROGRAM NEUROSCI,ANN ARBOR,MI 48109
关键词
D O I
10.1016/0306-4522(94)00568-P
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Prior work has shown that intrastriatal injection of the metabotropic glutamate receptor agonist 1S,3R-ACPD results in pronounced contralateral rotation, and the basis for this effect is thought to be increased activity of dopaminergic nigrostriatal neurons. We tested this hypothesis by determining the expression of Fos-like immunoreactivity, after intrastriatal injection of 1S,3R-ACPD. Intense Fos-like immunoreactivity was noted in the globus pallidus, entopeduncular nucleus, subthalamic nucleus and substantia nigra pars reticulata. Ablation of the subthalamic nucleus 10 days prior to intrastriatal injection of 1S,3R-ACPD abolished rotational behaviour but not Fos-like immunoreactivity in the globus pallidus, entopeduncular nucleus and substantia nigra. intrasubthalamic injection of IS,3R-ACPD produced marked contralateral rotation and a pattern of Fos-like immunoreactivity similar to that seen after intrastriatal 1S,3R-ACPD injection. These results suggest that stimulation of striatal metabotropic glutamate receptors inhibits striatal projection neuron activity, while stimulation of subthalamic metabotropic glutamate receptors increases subthalamic nucleus activity. Increased subthalamic nucleus activity is necessary and sufficient for the expression of rotational behavior. These results also suggest that metabotropic glutamate receptor antagonists may be useful in the treatment of Parkinson's disease.
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页码:55 / 65
页数:11
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