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Ursolic acid attenuates beta-amyloid-induced memory impairment in mice / Ácido ursólico atenua a perda de memória induzida por beta-amilóide em ratos
Liang, Wenna; Zhao, Xiaoyang; Feng, Jinping; Song, Fenghua; Pan, Yunzhi.
  • Liang, Wenna; Liaocheng. The Third People’s Hospital. Department of Neurology. CN
  • Zhao, Xiaoyang; Liaocheng. The Third People’s Hospital. Department of Neurology. CN
  • Feng, Jinping; Liaocheng. The Third People’s Hospital. Department of Neurology. CN
  • Song, Fenghua; Liaocheng. The Third People’s Hospital. Department of Neurology. CN
  • Pan, Yunzhi; Liaocheng. The Third People’s Hospital. Department of Neurology. CN
Arq. neuropsiquiatr ; 74(6): 482-488, June 2016. graf
Article in English | LILACS | ID: lil-784185
ABSTRACT
ABSTRACT Objective Increasing evidence demonstrates that oxidative stress and inflammatory are involved in amyloid β (Aβ)-induced memory impairments. Ursolic acid (UA), a triterpenoid compound, has potent anti-inflammatory and antioxidant activities. However, it remains unclear whether UA attenuates Aβ-induced neurotoxicity. Method The aggregated Aβ25-35 was intracerebroventricularly administered to mice. Results We found that UA significantly reversed the Aβ25-35-induced learning and memory deficits. Our results indicated that one of the potential mechanisms of the neuroprotective effect was attenuating the Aβ25-35-induced accumulation of malondialdehyde (MDA) and depletion of glutathione (GSH) in the hippocampus. Furthermore, UA significantly suppressed the upregulation of IL-1β, IL-6, and tumor necrosis-α factor levels in the hippocampus of Aβ25-35-treated mice. Conclusion These findings suggest that UA prevents memory impairment through amelioration of oxidative stress, inflammatory response and may offer a novel therapeutic strategy for the treatment of Alzheimer’s disease.
RESUMO
RESUMO Objetivo Há evidências crescentes de que o estresse oxidativo e a inflamação estão envolvidos na perda de memória induzida pelo peptídeo beta-amilóide (βA). O ácido ursólico (AU), um composto triterpenóide, apresenta atividades anti-inflamatórias e antioxidantes potentes. Entretanto, não se sabe ainda se o AU atenua a neurotoxicidade induzida pelo βA. Método O agregado βA 25-35 foi administrado aos ratos por via intracerebroventricular. Resultados Observou-se que o AU reverteu significativamente os déficits de aprendizado e de memória induzidos pelo βA 25-35. Portanto, um dos potenciais mecanismos do efeito neuroprotetor seria a atenuação do acúmulo de malondialdeído e a depleção de glutationa no hipocampo induzidos pelo βA 25-35. Além disso, o AU suprimiu significativamente a supra regulação dos níveis de IL-1β, IL-6 e do fator de necrose tumoral α no hipocampo dos ratos tratados com βA 25-35. Conclusão Esses achados sugerem que o AU previne a perda de memória através da melhora do estresse oxidativo e da resposta inflamatória, podendoproporcionar uma nova estratégia terapêutica para o tratamento da doença de Alzheimer.
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Full text: Available Index: LILACS (Americas) Main subject: Triterpenes / Amyloid beta-Peptides / Oxidative Stress / Neuroprotective Agents / Memory Disorders Limits: Animals Language: English Journal: Arq. neuropsiquiatr Journal subject: Neurology / Psychiatry Year: 2016 Type: Article Affiliation country: China Institution/Affiliation country: Liaocheng/CN

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Full text: Available Index: LILACS (Americas) Main subject: Triterpenes / Amyloid beta-Peptides / Oxidative Stress / Neuroprotective Agents / Memory Disorders Limits: Animals Language: English Journal: Arq. neuropsiquiatr Journal subject: Neurology / Psychiatry Year: 2016 Type: Article Affiliation country: China Institution/Affiliation country: Liaocheng/CN