Raphé grafts and 3,4-diaminopyridine-evoked overflow of serotonin in the rat hippocampus after 5,7-dihydroxytryptamine lesions: Evidence for 5-HT autoreceptors
NeuroReport, ISSN: 0959-4965, Vol: 13, Issue: 15, Page: 1871-1874
2002
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Article Description
A first experiment verified that the overflow of 5-HT evoked by 75 μM 3,4-diaminopyridine in superfused hippocampal slices was calcium-dependent, tetrodotoxin-sensitive and modulable by drugs acting on 5-HT autoreceptors. Subsequently, the technique was used in rats to investigate the effects of 5,7-dihydroxytryptamine lesions and intrahippocampal serotonergic grafts. The lesions reduced the accumulation (-81%) and relative evoked overflow (-23%; absolute evoked overflow -86%) of [H]5-HT, but increased the relative baseline overflow (+23%; absolute baseline overflow -78%). Grafts partially compensated for these effects. In slices from grafted rats, the evoked overflow was reduced by application of a 5-HT receptor agonist (8-OH-DPAT), a response not found in sham-operated and lesion-only rats. Although the graft-induced effects were less marked than in previous studies, they were beneficial and modulated by a mechanism that normally does not operate in the intact hippocampus. © 2002 Lippincott Williams & Wilkins.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0037191352&origin=inward; http://dx.doi.org/10.1097/00001756-200210280-00008; http://www.ncbi.nlm.nih.gov/pubmed/12395082; http://journals.lww.com/00001756-200210280-00008; https://dx.doi.org/10.1097/00001756-200210280-00008; https://journals.lww.com/neuroreport/Abstract/2002/10280/Raph__grafts_and_3,4_diaminopyridine_evoked.8.aspx
Ovid Technologies (Wolters Kluwer Health)
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