Efeito neuroprotetor da troxerrutina no Parkinsonismo experimental induzido por 6-OHDA em ratos

• Ano de defesa: 2016
• Autor(a) principal: Sousa, Priscila Caracas Vieira de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Palavras-chave em Português: Inflamação; Troxerrutina; Doença de Parkinson
• Link de acesso: http://www.repositorio.ufc.br/handle/riufc/19350

Parkinson’s disease (PD) is characterized by a progressive degeneration of dopaminergic neurons in the substantia nigra (SN) being the second most common form of neurodegenerative disease among the elderly. The clinical aspects of PD shows an intersection between motor symptoms, cognitive, behavioral and neuropsychiatric changes and symptoms related to failure in the autonomic nervous system, these symptoms are associated mainly to deficiency of dopamine (DA). The administration of 6-OHDA mimics the decrease of dopamine content in the striatum, inflammation, apoptosis and oxidative stress present in PD to test neuroprotective agents in animal models. The troxirutin, naturally occurring substance, has strong anti-inflammatory activity, with a potential agent neuroprotetore the toxicity of 6-OHDA in mice. The aim of this study was to to investigate the effects of troxirutin on neurotoxicity induced by 6-OHDA. So, male Wistar rats was divided (220-250 g) into four groups: false-operated (FO), FO + T200 (troxirutin treated with 200 mg/kg, for 18 days v.o), 6-OHDA (received stereotaxic injections of 6-OHDA 18 g/3μl the right striatum) + 6-OHDA T200 (received stereotaxic injections of 6-OHDA 18 g/3μl the right striatum treated with troxerutin). The results shows that treatment with troxerutin decreased the number of contralateral rotations in the test of apomorphine. The troxirutin also improved vertical exploratory activity of animals in the open field test (rearing), the depressive-like state in the forced swimming test, as well as the recent memory of the animals in the test of passive avoidance and procedure memory in the cued version of the Morris Water maze. The troxirutin has also prevented the reduction of dopamine content in the SN as well as the microgliosis and astrogliosis in the striatum. Troxirrutin treatment also decreased the neuro-inflammation by reducing expression of TNF-α, NF-κBp 65 and p-Akt in the striatum. The results obtained in this study suggest that troxerutin reduces inflammation caused by the injection of 6-OHDA, highlighting the adjunct therapeutic potential of anti-inflammatory disease.