Excitatory and inhibitory amino acid binding sites in human dentate nucleus.
Autoradiography of excitatory and inhibitory amino acid binding sites in human dentate nuclei indicated virtually no binding to N-methyl-D-aspartate (NMDA) or gamma-aminobutyric acidB (GABAB) binding sites, and a low density of kainate binding sites. alpha-Amino-3-hydroxy-5-methylisoxazole-4-propionic acid, metabotropic-quisqualate, benzodiazepine, and gamma-aminobutyric acidA (GABAA) binding sites were present in moderate abundance. Our NMDA results differ from those found previously in rodents. GABAA receptors are probably the primary mediators of inhibitory neurotransmission and alpha-amino-3-hydroxy-5-methylisoxazole-4-propionic acid and metabotropic-quisqualate receptors are probably the primary mediators of excitatory neurotransmission within the human deep cerebellar nuclei.
Albin
R L
RL
Department of Neurology, University of Michigan, Ann Arbor 48109.
Price
R H
RH
Sakurai
S Y
SY
Penney
J B
JB
Young
A B
AB
D000328:Adult; D000368:Aged; D000596:Amino Acids / Q000378:metabolism*; D001345:Autoradiography; D001665:Binding Sites; D002529:Cerebellar Nuclei / Q000378:metabolism*; D016291:Dizocilpine Maleate / Q000378:metabolism; D006801:Humans; D007608:Kainic Acid / Q000378:metabolism; D008875:Middle Aged; D016202:N-Methylaspartate / Q000378:metabolism; D009433:Neural Inhibition / Q000502:physiology*; D005680:gamma-Aminobutyric Acid / Q000378:metabolism*
D000596:Amino Acids; D005680:gamma-Aminobutyric Acid; D016202:N-Methylaspartate; D016291:Dizocilpine Maleate; D007608:Kainic Acid