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• W1561488205 abstract "Exploring the mechanisms of serotonin [5-hydroxytryptamine (5-HT)] in the brain requires an in vivo method that combines fast temporal resolution with chemical selectivity. Fast-scan cyclic voltammetry is a technique with sufficient temporal and chemical resolution for probing dynamic 5-HT neurotransmission events; however, traditionally it has not been possible to probe in vivo 5-HT mechanisms. Recently, we optimized fast-scan cyclic voltammetry for measuring 5-HT release and uptake in vivo in the substantia nigra pars reticulata (SNR) with electrical stimulation of the dorsal raphe nucleus (DRN) in the rat brain. Here, we address technical challenges associated with rat DRN surgery by electrically stimulating 5-HT projections in the medial forebrain bundle (MFB), a more accessible anatomical location. MFB stimulation elicits 5-HT in the SNR; furthermore, we find simultaneous release of an additional species. We use electrochemical and pharmacological methods and describe physiological, anatomical and independent chemical analyses to identify this species as histamine. We also show pharmacologically that increasing the lifetime of extracellular histamine significantly decreases 5-HT release, most likely because of increased activation of histamine H-3 receptors that inhibit 5-HT release. Despite this, under physiological conditions, we find by kinetic comparisons of DRN and MFB stimulations that the simultaneous release of histamine does not interfere with the quantitative 5-HT concentration profile. We therefore present a novel and robust electrical stimulation of the MFB that is technically less challenging than DRN stimulation to study 5-HT and histamine release in the SNR." @default.
• W1561488205 created "2016-06-24" @default.
• W1561488205 creator A5001476844 @default.
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• W1561488205 creator A5083091690 @default.
• W1561488205 date "2011-07-18" @default.
• W1561488205 modified "2023-10-10" @default.
• W1561488205 title "In vivo electrochemical evidence for simultaneous 5-HT and histamine release in the rat substantia nigra pars reticulata following medial forebrain bundle stimulation" @default.
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• W1561488205 doi "https://doi.org/10.1111/j.1471-4159.2011.07352.x" @default.
• W1561488205 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3155665" @default.
• W1561488205 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21682723" @default.
• W1561488205 hasPublicationYear "2011" @default.
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