Isoflurane anesthesia induces biphasic effect on dopamine release in the rat striatum

被引:40
作者
Adachi, YU
Yamada, S
Satomoto, M
Higuchi, H
Watanabe, K
Kazama, T
机构
[1] Japan Air Self Def Force, Med Clin Hamamatsu Base, Hamamatsu, Shizuoka 4328551, Japan
[2] Natl Def Med Coll, Dept Anesthesiol, Tokorozawa, Saitama 359, Japan
[3] Gifu Hosp, Japan Air Self Def Force, Kagamihara, Japan
[4] Tokyo Womens Med Univ, Dept Anesthesiol, Tokyo, Japan
[5] Shiki Citizen Hosp, Dept Anesthesia, Shiki, Japan
关键词
microdialysis; isoflurane anesthesia; dopamine; monoamine oxidase inhibitor; pargyline;
D O I
10.1016/j.brainresbull.2005.06.020
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
The effect of isoflurane anesthesia on changes in the extracellular concentrations of dopamine (DA) and its metabolites (3-methoxytyramine (3-MT), 3,4-dihydroxyphenylacetic acid (DOPAC) and homovanillic acid (HVA)) modulated by pargyline. monoamine oxidase inhibitor, was studied using in vivo microdialysis techniques. A microdialysis probe was implanted into the right striatum of male SD rats. Each rat (n = 5-6) was given saline or the same volume of 30 or 75 mg kg(-1) pargyline intraperitoneally with or without 1 h isoflurane anesthesia (1 or 3%). Isoflurane anesthesia increased the extracellular concentration of DA in high dose (3%) and increased the metabolite concentrations in a dose-dependent manner. Pargyline administration increased the extracellular concentration of DA and 3-MT, and decreased that of other metabolites. After 30 mg kg(-1) pargyline treatment, 1% isoflurane-induced DA release and increasing of 3-MT were preserved, whereas high dose isoflurane (3%) decreased the concentration of metabolites (DOPAC and HVA), despite of the increase by low dose isoflurane (DOPAC). When 75 mg kg(-1) pargyline was administered, isoflurane anesthesia decreased the concentration of DA and DOPAC. The isoflurane-induced 3-MT increase was preserved in all experiments. Our results suggest that isoflurane anesthesia induced biphasic effect on DA regulation probably by the potentiation of DA release and the inhibition of DA synthesis. Isoflurane might modulate DA homeostasis presynaptically. (c) 2005 Elsevier Inc. All rights reserved.
引用
收藏
页码:176 / 181
页数:6
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