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| Registros recuperados: 17 | |
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| Lacerda,J.E.C.; Campos,R.R.; Araujo,G.C.; Andreatta-Van Leyen,S.; Lopes,O.U.; Guertzenstein,P.G.. |
| The rostral ventrolateral medulla (RVLM) contains neurons involved in tonic and reflex control of arterial pressure. We describe the effects of gamma-aminobutyric acid (GABA) and anesthetics injected into the RVLM of conscious and urethane (1.2 g/kg, iv) anesthetized Wistar rats (300-350 g). In conscious rats, bilateral microinjection of GABA (50 nmol/200 nl) induced a small but significant decrease in blood pressure (from 130 ± 3.6 to 110 ± 5.6 mmHg, N = 7). A similar response was observed with sodium pentobarbital microinjection (24 nmol/200 nl). However, in the same animals, the fall in blood pressure induced by GABA (from 121 ± 8.9 to 76 ± 8.8 mmHg, N = 7) or pentobarbital (from 118 ± 4.5 to 57 ± 11.3 mmHg, N = 6) was significantly increased after... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vasomotor tone; Ventrolateral medulla; RVLM; GABA; Conscious rats. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000900019 |
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| Collares,E.F.; Vinagre,A.M.. |
| Dipyrone administered intravenously (iv) or intracerebroventricularly (icv) delays gastric emptying (GE) in rats. Gamma-aminobutyric acid (GABA) is the most potent inhibitory neurotransmitter of the central nervous system. The objective of the present study was to determine the effect of icv baclofen, a GABA B receptor agonist, on delayed GE induced by dipyrone. Adult male Wistar rats received a saline test meal containing phenol red as a marker. GE was indirectly evaluated by determining the percent of gastric retention (%GR) of the meal 10 min after orogastric administration. In the first experiment, the animals were injected iv with vehicle (Civ) or 80 mg/kg (240 µmol/kg) dipyrone (Dp iv), followed by icv injection of 10 µl vehicle (bac0), or 0.5... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gastric emptying; Dipyrone; GABA; GABA B receptors; Baclofen. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000100015 |
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| Xie,XZ; Liang,C; Li,MH; Chen,Z. |
| ABSTRACT Under routine feeding conditions, 1-day-old male chicks were randomly divided into control group (CK), heat-stress group (HS), and GABA + heat stress group (GABA+HS). The thymus contents of IL-1, IL-2, TGF-β1, IFN-γ, GH and HSP70 were determined by enzyme-linked immunosorbent assays. The results showed that: (1) IL-1 and TGF-β1 contents of HS group were significantly lower than those of the CK group (p<0.05), and those of the GABA+HS group were significantly higher relative to the HS group (p<0.05); (2) IL-2 and IFN-γ contents of the HS group were significantly higher than those of the CK group (p<0.05), and those of the GABA+HS group were significantly lower relative to the HS group (p<0.05);(3) the thymus GH content of all three... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heat stress; GABA; Cytokines; Thymus; Chicks. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000100143 |
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| 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 |
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| Cecchini,A.L.; Soares,A.M.; Giglio,J.R.; Amara,S.; Arantes,E.C.. |
| This paper describes a brief study on the crotoxin mechanism of action, regarding the transport of GABA and L-glutamate in rats cortico-cerebral synaptosomes and in heterologous systems, such as COS-7 cells expressing gabaergic transporters, and C6 glioma cells and Xenopus oocytes expressing glutamatergic transporters. Crotoxin concentrations over 1 µM caused an inhibitory effect of ³H-L-glutamate and ³H-GABA, and reversibly inhibited L-glutamate uptake by C6 glioma cells. When COS-7 cells were assayed, no inhibition of the ³H-GABA transport could be evidenced. Crotoxin kept its inhibitory effect on neurotransmitters uptake even when Ca2+ ions were removed from the medium, therefore, independently of its PLA2 activity. In addition, high concentrations (2... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crotoxin; L-glutamate; GABA; Crotalus durissus terrificus. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992004000300006 |
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| Toomsan,Yanyong; Chomphoo,Surang; Pakkarato,Sawetree; Watanabe,Masahiko; Kondo,Hisatake; Hipkaeo,Wiphawi. |
| According to recent studies, it is highly possible that the occurrence of vesicular inhibitory amino acid transporter (VIAAT) is a good marker of GABA-signaling not only in the brain, but also in extra-brain tissue cells containing GABA and GAD. In view of this, the present study was attempted to localize VIAAT-immunoreactivity in the submandibular gland of mice. In the present study, the submandibular glands of male mice at various postnatal developmental stages were examined for detailed localization of VIAAT-immunoreactivity in immunohistochemistry at light microscopic level. The immunoreactivity for VIAAT was localized in epithelial cells of proximal and distal excretory ducts with the striated portion more intensely immunopositive at young postnatal... |
| Tipo: Journal article |
Palavras-chave: VIATT-immunoreactivity; GABA; Salivary glands; Arteriolar smooth muscle. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000100019 |
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| Rodrigues-Alves,Patrícia de Sá e Benevides; Flório,Jorge Camilo; Lebrun,Ivo; Bernardi,Maria Martha; Spinosa,Helenice de Souza. |
| The present study investigated the effects of t moxidectin (MXD) in some parameters of rat motor function and neurochemical. The general activity in the open field and the motor coordination in the wooden beam were employed to evaluate the MXD effects. The results showed that, in the open field, even at high doses (2.0 and 20.0 mg/kg), the MXD did not alter the locomotion and the rearing frequencies. However, MXD was able to impair the motor coordination of the animals at wooden beam. Neurochemical studies of striatal GABA and dopamine neurotransmitters showed a reduced levels of dopamine and its metabolite, homovanillic acid, without interference on striatal GABA levels. Since GABAergic receptor stimulation had an inhibitory effect on dopaminergic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Moxidectin; GABA; Motor coordination; Rat; Open field; Wooden beam. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000400012 |
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| Heldwein,C.G.; Silva,L.L.; Reckziegel,P.; Barros,F.M.C.; Bürger,M.E.; Baldisserotto,B.; Mallmann,C.A.; Schmidt,D.; Caron,B.O.; Heinzmann,B.M.. |
| The objective of this study was to identify the possible involvement of the GABAergic system in the anesthetic effect of Lippia alba essential oil (EO). We propose a new animal model using silver catfish (Rhamdia quelen) exposed to an anesthetic bath to study the mechanism of action of EO. To observe the induction and potentiation of the anesthetic effect of EO, juvenile silver catfish (9.30 ± 1.85 g; 10.15 ± 0.95 cm; N = 6) were exposed to various concentrations of L. alba EO in the presence or absence of diazepam [an agonist of high-affinity binding sites for benzodiazepinic (BDZ) sites coupled to the GABA A receptor complex]. In another experiment, fish (N = 6) were initially anesthetized with the EO and then transferred to an anesthetic-free aquarium... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: False-melissa; Silver catfish; Benzodiazepines; Flumazenil; GABA. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012000500009 |
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| Drumond,L.E.; Kushmerick,C.; Guidine,P.A.M.; Doretto,M.C.; Moraes,M.F.D.; Massensini,A.R.. |
| Epilepsy is a neurological disorder associated with excitatory and inhibitory imbalance within the underlying neural network. This study evaluated inhibitory γ-amino-butyric acid (GABA)ergic modulation in the CA1 region of the hippocampus of male Wistar rats and Wistar audiogenic rats (aged 90 ± 3 days), a strain of inbred animals susceptible to audiogenic seizures. Field excitatory postsynaptic potentials and population spike complexes in response to Schaffer collateral fiber stimulation were recorded in hippocampal slices before and during application of picrotoxin (50 µM, 60 min), a GABA A antagonist, and the size of the population spike was quantified by measuring its amplitude and slope. In control audiogenic-resistant Wistar rats (N = 9), picrotoxin... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Epilepsy; Extracellular recording; GABA; Hippocampus; Wistar audiogenic rats; Picrotoxin. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011001000011 |
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| Silva,L.L.; Garlet,Q.I.; Benovit,S.C.; Dolci,G.; Mallmann,C.A.; Bürger,M.E.; Baldisserotto,B.; Longhi,S.J.; Heinzmann,B.M.. |
| This study evaluated the sedative and anesthetic effects of the essential oils (EO) of Hyptis mutabilis (Rich.) Briq. and their isolated components on silver catfish (Rhamdia quelen). Quantitative chemical differences between the EOs obtained from leaves and inflorescences were verified, and a new chemotype rich in globulol was described. Although there were no significant differences in the time of induction for sedation and anesthesia between the EOs, only the leaf EO at 344 mg/L anesthetized all fish without side effects. Fractionation of the leaf EO was carried out by column chromatography. The isolated compounds [(+)-1-terpinen-4-ol and (-)-globulol] showed different activity from that detected for the leaf EO in proportional concentrations and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Silver catfish; (+)-1-Terpinen-4-ol; (-)-Globulol; Sedation; GABA. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000900771 |
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| Martijena,I.D.; Molina,V.A.. |
| It is well recognized that stressful experiences promote robust emotional memories, which are well remembered. The amygdaloid complex, principally the basolateral complex (BLA), plays a pivotal role in fear memory and in the modulation of stress-induced emotional responses. A large number of reports have revealed that GABAergic interneurons provide a powerful inhibitory control of the activity of projecting glutamatergic neurons in the BLA. Indeed, a reduced GABAergic control in the BLA is essential for the stress-induced influence on the emergence of associative fear memory and on the generation of long-term potentiation (LTP) in BLA neurons. The extracellular signal-regulated kinase (ERK) subfamily of the mitogen-activated protein kinase (MAPK) signaling... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stress; Amygdala; GABA; Memory; Fear. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012000400004 |
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| Pakinee Akkaravessapong; Suganya Wongpornchai; Sunanta Wongpiyachon; Kitsada Pitija; Angsutorn Wasusun; Panawan Suttiarporn. |
| Rice contains several kinds of bio-functional components. In this study, γ-aminobutyric acid (GABA) and Tocopherol, or Vitamin E were identified and their relationships to antioxidant activity using DPPH assay of both brown and pre germinated Thai rice varieties were studied. GABA are one of the two inhibitory neurotransmitters which make the neuron resistant to stimulation by excitatory neurotransmitters and inhibitor of some cancer cells activity whereas Tocopherol, or Vitamin E, which acts as antioxidant and improve blood cholesterol. Identification of GABA and Tocopherol in both brown and pre-germinated brown rice grown from different locations were conducted in eleven varieties, namely: Khao Dawk Mali 105, PTT1, CN1, RD31, Sang yod, RD6, Hom... |
| Tipo: PhysicalObject |
Palavras-chave: Antioxidant activity; Rice varieties; Tocopherol; DPPH assay; Brown rice; Pre-germinated brown rice; GABA; Gamma aminobutyric acid; Vitamin e; Nutritive value; Chemical composition; High performance liquid chromatography; HPLC; ฤทธิ์ต้านอนุมูลอิสระ; กาบา; โทโคฟีรอล; พันธุ์ข้าว; ข้าวกล้อง; ข้าวกล้องงอก; วิตามินอี; โครงสร้างทางเคมี; การวิเคราะห์องค์ประกอบทางเคมี; คุณค่าทางโภชนาการ. |
| Ano: 2013 |
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5713 |
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| Pakinee Akkaravessapong; Angsutorn Wasusun; Suganya Wongpornchai. |
| Rice contains several kinds of bio-functional components. In this study, γ-aminobutyric acid (GABA) and tocopherol, or Vitamin E were identified and their relationships to antioxidant activity using DPPH assay of both brown and pre germinated Thai rice were studied. GABA, one of the two inhibitory neurotransmitters that make the neuron resistant to stimulation by excitatory neurotransmitters and inhibitor of some cancer cells activity. Tocopherols, or Vitamin E, are natural antioxidants which help improve blood cholesterol. Identification of GABA and tocopherol in both brown and pre-germinated brown rice grown from different locations were conducted in eleven varieties, namely: Khao Dawk Mali 105, PTT1, CNT1, RD31, Sang Yod, RD6, Hom Kradang-nga, Niaw Dam... |
| Tipo: PhysicalObject |
Palavras-chave: Anti oxidant activity; GABA; Tocopherol; DPPH assay; Brown rice; Pre-germinated brown rice; ข้าวกล้อง; ข้าวกล้องงอก; กาบา; โทโคฟีรอล; ฤทธิ์ต้านอนุมูลอิสระ. |
| Ano: 2013 |
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5596 |
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| Registros recuperados: 17 | |
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