PMID: 16634541Apr 26, 2006Paper

The effect of isoflurane anesthesia on dopamine release in rat striatum with pretreatment of imipramine

Masui. The Japanese journal of anesthesiology
Yushi AdachiShigehito Sato

Abstract

Isoflurane anesthesia has been shown to have a possibility of inducing a biphasic effect on dopamine release in rat striatum. The current study investigated the effect of isoflurane on the extracellular concentration of dopamine in the rat striatum pretreated by a classical antidepressant, imipramine, using in vivo microdialysis techniques. After intraperitoneal administration of 5 and 10 mg x kg(-10 of imipramine, the rats were anesthetized with 1 and 2.5% isoflurane inhalation. The control group was injected saline. Isoflurane anesthesia increased the extracellular concentration of dopamine metabolites without any change in dopamine concentration. Under pretreatment of 5 mg x kg(-1) of imipramine, the effect of isoflurane on the change in dopamine and its metabolites was preserved. Whereas, 10 mg x kg(-1) of imipramine pretreatment induced a marked increase in the extracellular concentration of dopamine when only 1% isoflurane was applied but not with 2.5% isoflurane. In the rat administered 10 mg x kg(-1) of imipramine, anesthesia-induced increase of 3-methoxytyramine was not found. Our previous investigation suggested that the isoflurane anesthesia has a biphasic effect on dopamine release in rat striatum under pargyline pr...Continue Reading

Related Concepts

Related Feeds

Basal Ganglia

Basal Ganglia are a group of subcortical nuclei in the brain associated with control of voluntary motor movements, procedural and habit learning, emotion, and cognition. Here is the latest research.