Effect of fish oil intake on glucose levels in rat prefrontal cortex, as measured by microdialysis

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dc.contributor.authorSousa, Isy Faria de [UNIFESP]
dc.contributor.authorSouza, Adriana Pereira de [UNIFESP]
dc.contributor.authorAndrade, Iracema Senna de [UNIFESP]
dc.contributor.authorBoldarine, Valter Tadeu [UNIFESP]
dc.contributor.authorNascimento, Claudia Maria da Penha Oller do [UNIFESP]
dc.contributor.authorOyama, Lila Missae [UNIFESP]
dc.contributor.authorTelles, Monica Marques [UNIFESP]
dc.contributor.authorRibeiro, Eliane Beraldi [UNIFESP]
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.date.accessioned2016-01-24T14:34:52Z
dc.date.available2016-01-24T14:34:52Z
dc.date.issued2013-12-26
dc.description.abstractBackground: Brain glucose sensing may contribute to energy homeostasis control. the prefrontal cortex (PFC) participates in the hedonic component of feeding control. As high-fat diets may disrupt energy homeostasis, we evaluated in male Wistar rats whether intake of high-fat fish-oil diet modified cortical glucose extracellular levels and the feeding induced by intracerebroventricular glucose or PFC glucoprivation.Methods: Glucose levels in PFC microdialysates were measured before and after a 30-min meal. Food intake was measured in animals receiving intracerebroventricular glucose followed, 30-min. later, by 2-deoxy-D-glucose injected into the PFC.Results: the fish-oil group showed normal body weight and serum insulin while fat pads weight and glucose levels were increased. Baseline PFC glucose and 30-min. carbohydrates intake were similar between the groups. Feeding-induced PFC glucose levels increased earlier and more pronouncedly in fish-oil than in control rats. Intracerebroventricular glucose inhibited feeding consistently in the control but not in the fish-oil group. Local PFC glucoprivation with 2-DG attenuated glucose-induced hypophagia.Conclusions: the present experiments have shown that, following food intake, more glucose reached the prefrontal cortex of the rats fed the high-fat fish-oil diet than of the rats fed the control diet. However, when administered directly into the lateral cerebral ventricle, glucose was able to consistently inhibit feeding only in the control rats. the findings indicate that, an impairment of glucose transport into the brain does not contribute to the disturbances induced by the high-fat fish-oil feeding.en
dc.description.affiliationUniversidade Federal de São Paulo Unifesp, Dept Fisiol, BR-04023062 São Paulo, Brazil
dc.description.affiliationUnifespUniversidade Federal de São Paulo Unifesp, Dept Fisiol, BR-04023062 São Paulo, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.format.extent9
dc.identifierhttps://dx.doi.org/10.1186/1476-511X-12-188
dc.identifier.citationLipids in Health and Disease. London: Biomed Central Ltd, v. 12, 9 p., 2013.
dc.identifier.doi10.1186/1476-511X-12-188
dc.identifier.fileWOS000329391600001.pdf
dc.identifier.issn1476-511X
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/37090
dc.identifier.wosWOS:000329391600001
dc.language.isoeng
dc.publisherBiomed Central Ltd
dc.relation.ispartofLipids in Health and Disease
dc.rightsAcesso aberto
dc.subjectFood intakeen
dc.subjectObesityen
dc.subjectLong-chain omega-3 fatty acidsen
dc.subjectBrain microdialysisen
dc.titleEffect of fish oil intake on glucose levels in rat prefrontal cortex, as measured by microdialysisen
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