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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Avaliação comportamental e neuroquímica de compostos naturais em modelos animais de transtornos de humor

Gazal, Marta de Oliveira 16 February 2014 (has links)
Submitted by Cristiane Chim (cristiane.chim@ucpel.edu.br) on 2017-02-09T12:26:04Z No. of bitstreams: 1 Marta de Oliveira Gazal.pdf: 1058953 bytes, checksum: a3559296bba6ad1afe42c3d2a3a018d3 (MD5) / Made available in DSpace on 2017-02-09T12:26:04Z (GMT). No. of bitstreams: 1 Marta de Oliveira Gazal.pdf: 1058953 bytes, checksum: a3559296bba6ad1afe42c3d2a3a018d3 (MD5) Previous issue date: 2014-02-16 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES# / #2075167498588264571# / #600 / Chronic stressful stimuli influence disease susceptibility to depression, cardiovascular, metabolic and neurodegenerative disorders. The present work investigated antidepressant and antioxidant properties of the aqueous extract from Cecropia pachystachya in a mouse model of chronic unpredictable stress (CUS). Our results indicated that acute administration of the aqueous extract (AE) from Cecropia pachystachya (200 and 400 mg/kg, p.o.) produced an antidepressant-like effect in the forced swimming test (FST). In addition, chronic treatment with Cecropia pachystachya extract (200 mg/kg, p.o., for 14 days) prevented the depressantlike effect but not the anxiogenic effect induced by CUS. In addition to the behavioural modifications, the 14 days of CUS increased lipid peroxidation in the hippocampus (HP) and prefrontal cortex (PFC) and decreased total thiol content in the HP. Cecropia pachystachya AE administration during CUS protocol was able to prevent the oxidative damage induced by stress. However, no changes were observed in the activity of the antioxidant enzymes superoxide dismutase and catalase in the above cited brain areas after the stress protocol and treatment. Our results suggest that Cecropia pachystachya prevented both depressive behavior and oxidative damage induced by CUS, supporting its neuroprotective potential against behavioral and biochemical dysfunctions induced by chronic stress. / Estímulos estressantes crônicos influenciam a susceptibilidade à depressão, doenças cardiovasculares, Metabólicas e neurodegenerativas. O presente trabalho investigou antidepressivos e Propriedades antioxidantes do extrato aquoso de Cecropia pachystachya em um modelo de rato De estresse crônico imprevisível (CUS). Nossos resultados indicaram que a administração aguda O extrato aquoso (AE) de Cecropia pachystachya (200 e 400 mg / kg, p.o.) produziu Efeito antidepressivo no teste de natação forçada (FST). Além disso, o tratamento crônico Com extrato de Cecropia pachystachya (200 mg / kg, p.o., durante 14 dias) evitou a Mas não o efeito ansiogênico induzido pelo CUS. Além do comportamento Modificações, os 14 dias de CUS aumentaram a peroxidação lipídica no hipocampo (HP) e Córtex pré-frontal (PFC) e menor teor de tiol total na HP. Cecropia pachystachya A administração de AE ​​durante o protocolo CUS foi capaz de prevenir o dano oxidativo induzido por estresse. No entanto, não foram observadas alterações na actividade das enzimas antioxidantes Superóxido dismutase e catalase nas áreas do cérebro acima citadas após o protocolo de estresse e tratamento. Nossos resultados sugerem que Cecropia pachystachya impediu tanto o comportamento depressivo E danos oxidativos induzidos pelo CUS, apoiando seu potencial neuroprotetor contra Comportamentais e bioquímicas induzidas pelo estresse crônico.

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