413 resultados para VASCO DE ESCUDERO, GRECIA, 1932-2011


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Background: Type-1 cannabinoid receptors (CB1R) are enriched in the hypothalamus, particularly in the ventromedial hypothalamic nucleus (VMH) that participates in homeostatic and behavioral functions including food intake. Although CB1R activation modulates excitatory and inhibitory synaptic transmission in the brain, CB1R contribution to the molecular architecture of the excitatory and inhibitory synaptic terminals in the VMH is not known. Therefore, the aim of this study was to investigate the precise subcellular distribution of CB1R in the VMH to better understand the modulation exerted by the endocannabinoid system on the complex brain circuitries converging into this nucleus. Methodology/Principal Findings: Light and electron microscopy techniques were used to analyze CB1R distribution in the VMH of CB1R-WT, CB1R-KO and conditional mutant mice bearing a selective deletion of CB1R in cortical glutamatergic (Glu-CB1R-KO) or GABAergic neurons (GABA-CB1R-KO). At light microscopy, CB1R immunolabeling was observed in the VMH of CB1R-WT and Glu-CB1R-KO animals, being remarkably reduced in GABA-CB1R-KO mice. In the electron microscope, CB1R appeared in membranes of both glutamatergic and GABAergic terminals/preterminals. There was no significant difference in the percentage of CB1R immunopositive profiles and CB1R density in terminals making asymmetric or symmetric synapses in CB1R-WT mice. Furthermore, the proportion of CB1R immunopositive terminals/preterminals in CB1R-WT and Glu-CB1R-KO mice was reduced in GABA-CB1R-KO mutants. CB1R density was similar in all animal conditions. Finally, the percentage of CB1R labeled boutons making asymmetric synapses slightly decreased in Glu-CB1R-KO mutants relative to CB1R-WT mice, indicating that CB1R was distributed in cortical and subcortical excitatory synaptic terminals. Conclusions/Significance: Our anatomical results support the idea that the VMH is a relevant hub candidate in the endocannabinoid-mediated modulation of the excitatory and inhibitory neurotransmission of cortical and subcortical pathways regulating essential hypothalamic functions for the individual's survival such as the feeding behavior.

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[ES] En este trabajo presentamos el perfil humano y profesional de Pedro de Arroquía (1667-1738) y de su hijo Cosme Ignacio (1689-1740), dos desconocidos pintores guipuzcoanos que trabajaron a lo largo del País Vasco y la Rioja, dando a conocer algunas obras inéditas de su producción documentada y conservada.

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[EUS] Artikulu honetan irakurketa ohituren feminizazioaz dihardugunean, edota generoa arakatzeaz, ez gatzaizkio lotzen irakurleria femeninoa ikertzeari soilik, baizik eta literatur sistema (Even-Zohar, 1990) osoa behatzeari. Lehenik, kontuan izan ditugu emakume idazle, ilustratzaile, literatur pertsonaia femenino nahiz emakumeari atxikitzen zaizkion gaiek zenbaterainoko oihartzuna izan duten ikerturiko populazioak eginiko testu irakurketan. Hartara, populazioak eginiko irakurketen bidez emakumetasunak (autorian nahiz iruditegian) zenbaterainoko presentzia izan duen aztertu nahi izan da. Bigarrenik, emakumearen presentzia literatur sistemaren testuinguruan antzeman nahi izan da, eskolaren eta etxearen esparruan, betiere ikerturiko populazioaren irakurketa ohiturei lotuta.

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Antonio Duplá Ansuategui, Piedad Frías Nogales e Iban Zaldúa (editores)

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Despite being the most effective treatment for Parkinson's disease, L-DOPA causes a development of dyskinetic movements in the majority of treated patients. L-DOPA-induced dyskinesia is attributed to a dysregulated dopamine transmission within the basal ganglia, but serotonergic and noradrenergic systems are believed to play an important modulatory role. In this study, we have addressed the role of the locus coeruleus nucleus (LC) in a rat model of L-DOPA-induced dyskinesia. Single-unit extracellular recordings in vivo and behavioural and immunohistochemical approaches were applied in rats rendered dyskinetic by the destruction of the nigrostriatal dopamine neurons followed by chronic treatment with L-DOPA. The results showed that L-DOPA treatment reversed the change induced by 6-hydroxydopamine lesions on LC neuronal activity. The severity of the abnormal involuntary movements induced by L-DOPA correlated with the basal firing parameters of LC neuronal activity. Systemic administration of the LC-selective noradrenergic neurotoxin N-(2-chloroethyl)-N-ethyl-2-bromobenzylamine did not modify axial, limb, and orolingual dyskinesia, whereas chemical destruction of the LC with ibotenic acid significantly increased the abnormal involuntary movement scores. These results are the first to demonstrate altered LC neuronal activity in 6-OHDA lesioned rats treated with L-DOPA, and indicate that an intact noradrenergic system may limit the severity of this movement disorder.

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Trabajo de Investigación Predoctoral 2006

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10 cartas (manuscritas y mecanografiadas) ; entre 208x124mm y 213x275mm. Ubicación: Caja 1 - Carpeta 33

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8 cartas y 1 tarjeta postal (manuscritas y mecanografiadas) ; entre 335x227mm y 135x90mm. Ubicación: Caja 1 - Carpeta 33

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8 cartas (manuscritas) y 1 carta (manuscrita y mecanografiada) ; entre 160x180mm y 320x200mm. Ubicación: Caja 1 - Carpeta 40

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[EUS] Artikulo honetan euskal isurialde atlantiarreko bi munitzipioetan martxan jarritako garapen lokaleko proiektuak aztertzen dira. Esperientzia horiek beherapen industrialean dagoen eskualde batean landa garapenak izan dezakeen egokitasunari buruz pentsatzera bultzatzen dute.

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[ES] El objetivo del artículo es explorar la potencialidad de la Evaluación Multi-criterio Social como enfoque metodológico para evaluar Espacios Naturales Protegidos (ENP) e iniciar un proceso de discusión sobre la conveniencia de incorporar esta metodología para la gobernanza de la Red Natura 2000 de la Comunidad Autónoma de Euskadi. Del caso de estudio analizado se desprende que la inclusión de la población local en un proceso participativo dirigido a la planificación y manejo de los ENP contribuiría a reducir el número y calado de conflictos potenciales. Asimismo, facilitaría la gobernanza efectiva de los ENP, lo que parece un reto ineludible para que las áreas protegidas logren sus objetivos y funciones.