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Titolo:
Tyrosine hydroxylase-immunoreactive projections from the caudal ventrolateral medulla to the subfornical organ in the rat
Autore:
Kawano, H; Masuko, S;
Indirizzi:
Saga Med Sch, Dept Anat, Saga 8498501, Japan Saga Med Sch Saga Japan 8498501 Med Sch, Dept Anat, Saga 8498501, Japan
Titolo Testata:
BRAIN RESEARCH
fascicolo: 1-2, volume: 903, anno: 2001,
pagine: 154 - 161
SICI:
0006-8993(20010608)903:1-2<154:THPFTC>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
PARAVENTRICULAR HYPOTHALAMIC NUCLEUS; SOLITARY TRACT; PREOPTICUS-MEDIANUS; NERVE-TERMINALS; NEUROPEPTIDE-Y; CATECHOLAMINERGIC NEURONS; SYNAPTIC CONTACTS; SUPRAOPTIC NUCLEI; COLLATERAL INPUT; CONNECTIONS;
Keywords:
catecholaminergic projections; wheat germ agglutinin-conjugated horseradish peroxidase-colloidal gold complex; retrograde labeling; immunohistochemistry;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Kawano, H Saga Med Sch, Dept Anat, Nabeshima 5-1-1, Saga 8498501, Japan Saga Med Sch Nabeshima 5-1-1 Saga Japan 8498501 8498501, Japan
Citazione:
H. Kawano e S. Masuko, "Tyrosine hydroxylase-immunoreactive projections from the caudal ventrolateral medulla to the subfornical organ in the rat", BRAIN RES, 903(1-2), 2001, pp. 154-161

Abstract

The subfornical organ (SFO) is known to be innervated by noradrenergic fibers. One possible origin of these fibers, which carry peripheral baroreceptor information to enhance the activity of SFO neurons, is the nucleus tractus solitarius (NTS). To investigate possible sites of origin of the catecholaminergic projections to the SFO, a retrograde tracing method was combinedwith immunohistochemistry in the rat. Stereotaxical injection of a retrograde tracer, wheat germ agglutinin-conjugated horseradish peroxidase-colloidal gold complex, into the SFO from the dorsal aspect revealed retrogradely labeled neurons in several catecholaminergic cell groups. A substantial number of retrogradely labeled neurons showing tyrosine hydroxylase (TH) immunoreactivity were found in the NTS and ventrolateral medulla (VLM) at levelscaudal to the obex and in the locus coeruleus, while retrogradely labeled neurons without TH immunoreactivity were found in the VLM at levels rostralto the obex and in the nucleus prepositus hypoglossi. When the tracer was injected into the structures dorsal to the SFO, including the triangular septal nucleus, the frequency of retrogradely labeled neurons in the NTS and VLM at the caudal level was very low. These findings indicate the existenceof catecholaminergic projections from the VLM (probably Al) to the SFO, inaddition to the noradrenergic projections from the NTS previously reported. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 12:00:21