|
|
|
| Registros recuperados: 11 | |
|
|
| Several glutamate receptor (GluR) subunits have been characterized during the past few years. In the present study, subunit-specific antisera were used to determine the distribution of the AMPA-type glutamate receptor subunits GluR1-4 in retinorecipient areas of the chick brain. Six white leghorn chicks (Gallus gallus, 7-15 days old, unknown sex) were deeply anesthetized and perfused with 4% buffered paraformaldehyde and brain sections were stained using immunoperoxidase techniques. The AMPA-type glutamate receptor subunits GluR1, GluR2/3 and GluR4 were present in several retinorecipient areas, with varying degrees of colocalization. For example, perikarya in layers 2, 3, and 5 of the optic tectum contained GluR1, whereas GluR2/3 subunits appeared mainly... |
|
Palavras-chave: Glutamate; Receptors; Neurotransmitters; Visual system; Visual pathways. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000100012 |
| |
|
|
| Tagawa,T.; Fontes,M.A.P.; Potts,P.D.; Allen,A.M.; Dampney,R.A.L.. |
| Neurons in the rostral and caudal parts of the ventrolateral medulla (VLM) play a pivotal role in the regulation of sympathetic vasomotor activity and blood pressure. Studies in several species, including humans, have shown that these regions contain a high density of AT1 receptors specifically associated with neurons that regulate the sympathetic vasomotor outflow, or the secretion of vasopressin from the hypothalamus. It is well established that specific activation of AT1 receptors by application of exogenous angiotensin II in the rostral and caudal VLM excites sympathoexcitatory and sympathoinhibitory neurons, respectively, but the physiological role of these receptors in the normal synaptic regulation of VLM neurons is not known. In this paper we... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Angiotensin receptors; Central cardiovascular pathways; Blood pressure; Hypothalamus; Neurotransmitters. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000600005 |
| |
|
| |
|
| |
|
|
| Antunes-Rodrigues,J.; Ruginsk,S.G.; Mecawi,A.S.; Margatho,L.O.; Cruz,J.C.; Vilhena-Franco,T.; Reis,W.L.; Ventura,R.R.; Reis,L.C.; Vivas,L.M.; Elias,L.L.K.. |
| Several forebrain and brainstem neurochemical circuitries interact with peripheral neural and humoral signals to collaboratively maintain both the volume and osmolality of extracellular fluids. Although much progress has been made over the past decades in the understanding of complex mechanisms underlying neuroendocrine control of hydromineral homeostasis, several issues still remain to be clarified. The use of techniques such as molecular biology, neuronal tracing, electrophysiology, immunohistochemistry, and microinfusions has significantly improved our ability to identify neuronal phenotypes and their signals, including those related to neuron-glia interactions. Accordingly, neurons have been shown to produce and release a large number of chemical... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hypothalamus; Gaseous neuromodulators; Neuropeptides; Endocannabinoids; Glial cells; Neurotransmitters. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000400327 |
| |
|
|
| Torrão,A.S.; Britto,L.R.G.. |
| Double-labeling immunohistochemical methods were used to investigate the occurrence of the alpha8 and alpha5 nicotinic receptor subunits in presumptive GABAergic neurons of the chick nervous system. Nicotinic receptor immunoreactivity was often found in cells exhibiting GABA-like immunoreactivity, especially in the visual system. The alpha8 subunit appeared to be present in presumptive GABAergic cells of the ventral lateral geniculate nucleus, nucleus of the basal optic root of the accessory optic system, and the optic tectum, among several other structures. The alpha5 subunit was also found in GABA-positive neurons, as observed in the lentiform nucleus of the mesencephalon and other pretectal nuclei. The numbers of alpha8- and alpha5-positive neurons that... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Acetylcholine; GABA; Neurotransmitters; Nicotinic receptors; Visual system. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001001000013 |
| |
|
| |
|
|
| Alfonso, Sebastien; Sadoul, Bastien; Gesto, Manuel; Joassard, Lucette; Chatain, Beatrice; Geffroy, Benjamin; Bégout, Marie-laure. |
| Coping styles consist of a coherent set of individual physiological and behavioral differences in stress responses that are consistent across time and context. Such consistent inter-individual differences in behavior have already been shown in European sea bass (Dicentrarchus labrax), but the associated mechanisms are still poorly understood. Here, we combine physiological measurements with individual behavioral responses in order to characterize coping styles in fish. Fish were tagged and placed in a tank for group risk-taking tests (GRT) at 8 months of age to evaluate boldness using the proxy latency of leaving a sheltered area towards an open area. A subsample of these fish were individually challenged 16 months later using an open field test (OFT), in... |
| Tipo: Text |
Palavras-chave: Personality; HPI axis; Gene transcription; Neurotransmitters. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00491/60282/63708.pdf |
| |
|
|
| Nencioni,ALA; Barreto,SA; Lebrun,I; Florio,JC; Lourenço,GA; Dorce,VAC. |
| TsTX is an α-type sodium channel toxin that stimulates the discharge of neurotransmitters from neurons. In the present study we investigated which neurotransmitters are released in the hippocampus after TsTX injection and if they are responsible for electrographic or histopathological effects. Microdialysis revealed that the toxin increased glutamate extracellular levels in the hippocampus; however, levels of gamma-aminobutyric acid (GABA), glycine, 5-hydroxyindoleacetic acid (5-HIAA), homovanillic acid (HVA) and 3,4-dihydroxyphenylacetic acid (DOPAC) were not significantly altered. Neurodegeneration in pyramidal cells of hippocampus and electroencephalographic alterations caused by the toxin were blocked by pretreatment with riluzole, a glutamate release... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Scorpion toxin; Microdialysis; Hippocampus; Neurotransmitters; Neurodegeneration; Riluzole. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992009000200007 |
| |
|
| |
| Registros recuperados: 11 | |
|
|
|
