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Serotonin uptake in...
Serotonin uptake into cerebrovascular nerve fibers of rat, visualization by immunohistochemistry, disappearance following sympathectomy, and release during electrical stimulation
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Chang, Jing-Yu (författare)
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- Ekblad, Eva (författare)
- Lund University,Lunds universitet,Neurogastroenterologi,Forskargrupper vid Lunds universitet,Neurogastroenterology,Lund University Research Groups
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- Kannisto, Päivi (författare)
- Lund University,Lunds universitet,Obstetrik och gynekologi, Lund,Sektion V,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Obstetrics and Gynaecology (Lund),Section V,Department of Clinical Sciences, Lund,Faculty of Medicine
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- Owman, Christer (författare)
- Lund University,Lunds universitet,Drug Target Discovery,Forskargrupper vid Lunds universitet,Lund University Research Groups
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(creator_code:org_t)
- Elsevier BV, 1989
- 1989
- Engelska.
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Ingår i: Brain Research. - : Elsevier BV. - 1872-6240 .- 0006-8993. ; 492:1-2, s. 79-88
- Relaterad länk:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Immunohistochemistry as well as in vitro uptake and release of [3H]5-HT were performed on pial arteries of rat to investigate the nature of 5-HT containing nerve fibers. Immunoreactive fibers were constantly found only in the basilar, vertebral and superior cerebellar arteries, while in the other parts of the circle of Willis, 5-HT immunofluorescent fibers were absent. After systemic treatment with tryptophan following inhibition of monoamine oxidase with nialamide the immunofluorescence intensity was markedly enhanced. The 5-HT immunoreactive fibers disappeared after superior cervical ganglionectomy or intraventricular administration of 6-hydroxydopamine, but persisted after administration of 5,6-dihydroxytryptamine. When isolated vessels were incubated in low concentration of 5-HT (1 nM) together with nialamide, a very dense plexus of 5-HT immunoreactive fibers appeared in all branches of the circle of Willis. Uptake and release experiments were carried out by incubation of arterial preparations with 3 nM [3H]5-HT (together with nialamide), followed by electrical field stimulation, or by exposure to tyramine or 124 mM potassium, all of which induced a 100%-350% increase in the tritium release over prestimulation values. Preincubation with cocaine and bilateral superior cervical ganglionectomy abolished or markedly attenuated the release upon all modes of stimulation. The results suggested that the 5-HT observed by immunohistochemistry in pial arteries is located in sympathetic nerve terminals where it may serve as a neuromodulator that is released during nerve activation.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Neurovetenskaper (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Neurosciences (hsv//eng)
Nyckelord
- Surgical sympathectomy
- Neurotoxic denervation
- Sympathetic nerve
- 5-Hydroxytryptamine
- Immunohistochemistry
- Cerebral artery
- 5-Hydroxytryptamine release
- Electrical nerve stimulation
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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