Monoaminergic tracts of the diencephalon and innervation of the pars intermedia in Rana temporaria

Rao, P. D. Prasada; Hartwig, H. G.

doi:10.1007/bf00222031

Cited by 78 publications

(10 citation statements)

References 29 publications

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“…In the PRO, in addition to the TH-positive but DBH-negative neurons observed in close association with the ependymal wall, we found a small number of 5-HTcontaining neurons which have not been observed by histofluorescence previously (13,19).…”

Section: Immunohistochemistrymentioning

confidence: 55%

“…In the PVO of several amphibia, two types of neurons with green and yellow fluorescence have been demonstrated (3,19,20), and these fluorophores were identified microspectrofluorometrically to be derived from dopamine and 5-HT (or 5-HTP), respectively (19,21). These two types of neurons were considered to extend their processes into the CSF.…”

Section: Immunohistochemistrymentioning

confidence: 99%

“…The identification of monoamine fluorophores in the neurons of the frog brain was also tried by microspectrofluorometry (19,21), but not fully established, so far. This paper is aimed at the elucidation of cellular localization and ultrastructural characterization of monoaminergic neurons in the frog brain by means of immunohistocvtochemical methods.…”

Section: Monoaminergicmentioning

confidence: 99%

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Immunohistocytochemical localization of the neurons containing catecholamine-synthesizing enzymes and serotonin in the brain of bullfrog (rana catesbiana).

Yoshida

Nagatsu

Kondo

et al. 1983

Acta Histochem. Cytochem

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Section: Immunohistochemistrymentioning

confidence: 55%

Section: Immunohistochemistrymentioning

confidence: 99%

Section: Monoaminergicmentioning

confidence: 99%

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Immunohistocytochemical localization of the neurons containing catecholamine-synthesizing enzymes and serotonin in the brain of bullfrog (rana catesbiana).

Yoshida

Nagatsu

Kondo

et al. 1983

Acta Histochem. Cytochem

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“…In its elongated shape, this neuronal complex in C. batrachus is comparable to the SCN of another cat fish, Ictamrus punctatus, identified on the basis of MRP fiber terminals and accumulation of grain after intraocular injection of tritiated proline [Prasada Rao and Sharma, 1982]. The SCN in teleosts has been shown to receive reti nal efferents [Collin, 1982;Prasada Rao and Sharma, 1982;von Bartheld and Meyer, 1988] as also reported in birds and mammals [Hartwig, 1974;Mai and Jungcr. 1977], Fur ther, the present study has revealed that the SCN projects to the pituitary, and hence it is suggestive that photic cues may modulate the hypophysial function via this pathway.…”

Section: Discussionmentioning

confidence: 86%

“…Failure to achieve retrograde labelling of these aminergic neurons may be because HRP is not specific for biogenic amines [Ljungdahl et al,I975J. In this study, we prefer to define the tuberal aggregation of neurons located in the hypothalamic walls on either side of the 3rd ventricle as the PVO. since a nucleus with a simi lar neuronal disposition has been known to exist in amphib ians [Tcrlou and Ploemacher, 1973;Prasada Rao and Hartwig, 1974], reptiles [Parent and Poitras, 1974] and birds [Warren-Soest et al, 1973]. However, some investigators who employed fluorescence techniques with teleostean brains have identified monoamincrgic neurons exclusively in the NRL and NRP and have claimed that these nuclei arc comparable to the PVO of other nonmammalian verte brates [sec Fryer ctal.. 1985 for references].…”

Section: Discussionmentioning

confidence: 99%

Hypophysiotropic Neurons in the Hypothalamus of the Catfish <i>Clarias batrachus: </i>A Cobaltous Lysine and HRP Study

Rao

Job²,

Schreibman³

1993

Brain Behav Evol

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Seven hypothalamic nuclei and several isolated perikarya that send projections to the pituitary gland were identified following administration of cobaltous lysine or horseradish peroxidase (HRP) to severed hypophysial stalks of previously hypophysectomized catfish, Clarias batrachus. Retrogradely labelled neurons were identified in the nucleus preopticus periventricularis, suprachiasmatic nucleus, paraventricular and supraoptic divisions of the magnocellular nucleus preopticus (NPO) and nucleus lateralis tuberis. A few neurons in the paraventricular subdivision of the NPO, however, remained unfilled; these may project to extrahypophysial sites. Three other nuclei contributing to the innervation of the pituitary gland include the paraventricular organ, nucleus recessus lateralis (NRL) and nucleus recessus posterioris (NRP), all of which contain cerebrospinal fluid-contacting aminergic neurons. These three neuronal aggregations were retrogradely labelled with cobaltous lysine but not with HRP. Isolated neurons displaying hypophysial connections were identified in the organon vasculosum laminae terminalis area, in the nucleus hypothalamics ventromedialis, and in the vicinity of the NRL and NRP. Thus the present study reveals that hypothalamic projections to the pituitary gland of catfish have their origin in several peptidergic and aminergic nuclei and perikarya hitherto unreported.

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Immunolocalization of aromatic L-amino acid decarboxylase, tyrosine hydroxylase, dopamine, and serotonin in the forebrain ofAmbystoma mexicanum

Beltramo

Pairault

Krieger³

et al. 1998

J. Comp. Neurol.

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To improve basic knowledge about the neurochemical organization of the urodele brain, and to study discrepancies in the localization of monoaminergic markers, we immunohistochemically charted the distribution of four such markers (tyrosine hydroxylase, aromatic L-amino acid decarboxylase, dopamine, and serotonin) in the axolotl (Ambystoma mexicanum) forebrain. Catecholaminergic and serotoninergic systems were found in similar locations to those seen in other Urodela. As seen in other vertebrates, the localization of the different monoaminergic markers reveals some inconsistencies. Cells that are exclusively tyrosine hydroxylase-immunoreactive are observed in the olfactory bulb, anterior olfactory nucleus/nucleus accumbens region, the epichiasmatic portion of the preoptic nucleus, and in the pars intercalaris thalami, whereas cells that are only labelled by aromatic L-amino acid decarboxylase are seen in the anterior olfactory nucleus/nucleus accumbens region, the bed nuclei of the anterior commissure, the posterior portion of the preoptic nucleus, the ventral hypothalamus, and the pars intercalaris thalami. The presence of cells solely serotonin (5-HT)-immunoreactive is suggested for the nucleus infundibularis dorsalis. Conversely, there were no areas that appeared to be exclusively immunoreactive for dopamine. Double-labelling for aromatic L-amino acid decarboxylase/tyrosine hydroxylase and aromatic L-amino acid decarboxylase/serotonin, together with cell counting, confirmed the existence of neurons that express only one monoaminergic marker in amphibian, supporting the hypothesis that these cells are universally present in the central nervous system of vertebrates.

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Monoaminergic tracts of the diencephalon and innervation of the pars intermedia in Rana temporaria

Cited by 78 publications

References 29 publications

Immunohistocytochemical localization of the neurons containing catecholamine-synthesizing enzymes and serotonin in the brain of bullfrog (rana catesbiana).

Immunohistocytochemical localization of the neurons containing catecholamine-synthesizing enzymes and serotonin in the brain of bullfrog (rana catesbiana).

Hypophysiotropic Neurons in the Hypothalamus of the Catfish <i>Clarias batrachus: </i>A Cobaltous Lysine and HRP Study

Immunolocalization of aromatic L-amino acid decarboxylase, tyrosine hydroxylase, dopamine, and serotonin in the forebrain ofAmbystoma mexicanum

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