On the release of glutamate and aspartate in the basal ganglia of the rat: Interactions with monoamines and neuropeptides

被引:23
作者
HerreraMarschitz, M
Goiny, M
You, ZB
Meana, JJ
Pettersson, E
RodriguezPuertas, R
Xu, ZQ
Terenius, L
Hokfelt, T
Ungerstedt, U
机构
[1] KAROLINSKA INST,DEPT PHARMACOL,S-10401 STOCKHOLM,SWEDEN
[2] KAROLINSKA INST,DEPT NEUROSCI,S-10401 STOCKHOLM,SWEDEN
[3] KAROLINSKA INST,DEPT CLIN NEUROSCI,S-10401 STOCKHOLM,SWEDEN
关键词
microdialysis; in vivo; excitatory amino acids; monoamines; neuropeptides; immunocytochemistry; Parkinson's disease; Alzheimer's disease; psychosis; rat;
D O I
10.1016/S0149-7634(96)00033-4
中图分类号
B84 [心理学]; C [社会科学总论]; Q98 [人类学];
学科分类号
03 ; 0303 ; 030303 ; 04 ; 0402 ;
摘要
Using highly sensitive analytical procedures, glutamate (Glu), aspartate (Asp) and several putative neurotransmitters and metabolites can be monitored simultaneously in the extracellular space of neostriatum, substantia nigra and cerebral cortex of the rat by in vivo microdialysis. Glu and Asp are found at sub-micromolar concentrations in all investigated brain regions. In order to ascertain their neuronal origin, we have extensively studied the sensitivity of extracellular Glu and Asp levels to: (i) K+-depolarization, (ii) Na+-channel blockade, (iii) removal of extracellular Ca2+, (iv) depletion of presynaptic vesicles, and (v) integrity of neuronal pathways. The relevance of these criteria for several neurotransmitters monitored simultaneously or in parallel experiments has also been examined. The functional interactions among different neuronal pathways in the basal ganglia are studied by using selective pharmacological treatments, administered systemically, or locally via intracerebral injections or the microdialysis perfusion medium. Immunohistochemical evidence for the existence of Glu and/or Asp neuronal pathways in the basal ganglia of the rat is presented, discussing especially new findings indicating the existence of a Glu-independent Asp system, intrinsic to the neostriatum of the rat. The clinical relevance of these interactions is discussed, focusing on the implications for the treatment of neurodegenerative disorders affecting the basal ganglia. (C) 1997 Elsevier Science Ltd.
引用
收藏
页码:489 / 495
页数:7
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