KM-34, a Novel Antioxidant Compound, Protects against 6-Hydroxydopamine-Induced Mitochondrial Damage and Neurotoxicity
作者:Luis Arturo Fonseca-Fonseca、Yanier Nuñez-Figueredo、Jeney Ramírez Sánchez、Maylin Wong Guerra、Estael Ochoa-Rodríguez、Yamila Verdecia-Reyes、René Delgado Hernádez、Noelio J. Menezes-Filho、Teresa Cristina Silva Costa、Wagno Alcântara de Santana、Joana L. Oliveira、Juan Segura-Aguilar、Victor Diogenes Amaral da Silva、Silva Lima Costa
DOI:10.1007/s12640-017-9851-5
日期:2019.8
The etiology of Parkinson’s disease is not completely understood and is believed to be multifactorial. Neuronal disorders associated to oxidative stress and mitochondrial dysfunction are widely considered major consequences. The aim of this study was to investigate the effect of the synthetic arylidenmalonate derivative 5-(3,4-dihydroxybenzylidene)-2,2-dimethyl-1,3-dioxane-4,6-dione (KM-34), in oxidative stress and mitochondrial dysfunction induced by 6-hydroxydopamine (6-OHDA). Pretreatment (2 h) with KM-34 (1 and 10 μM) markedly attenuated 6-OHDA-induced PC12 cell death in a concentration-dependent manner. KM-34 also inhibited H2O2 generation, mitochondrial swelling, and membrane potential dissipation after 6-OHDA-induced mitochondrial damage. In vivo, KM-34 treatment (1 and 2 mg/Kg) reduced percentage of asymmetry (cylinder test) and increased the vertical exploration (open field) with respect to untreated injured animals; KM-34 also reduced glial fibrillary acidic protein overexpression and increased tyrosine hydroxylase-positive cell number, both in substantia nigra pars compacta. These results demonstrate that KM-34 present biological effects associated to mitoprotection and neuroprotection in vitro, moreover, glial response and neuroprotection in SNpc in vivo. We suggest that KM-34 could be a putative neuroprotective agent for inhibiting the progressive neurodegenerative disease associated to oxidative stress and mitochondrial dysfunction.
帕金森病的病因尚不完全清楚,据信是多因素影响的。与氧化应激和线粒体功能障碍相关的神经元疾病被广泛认为是主要后果。本研究的目的是研究合成的亚芳基丙二酸酯衍生物 5-(3,4-二羟基亚苄基)-2,2-二甲基-1,3-二恶烷-4,6-二酮 (KM-34) 在氧化中的作用6-羟基多巴胺 (6-OHDA) 诱导的应激和线粒体功能障碍。用 KM-34(1 和 10 μM)预处理(2 小时)以浓度依赖性方式显着减弱 6-OHDA 诱导的 PC12 细胞死亡。 KM-34 还可以抑制 6-OHDA 诱导的线粒体损伤后 H2O2 的产生、线粒体肿胀和膜电位耗散。在体内,相对于未经治疗的受伤动物,KM-34 治疗(1 和 2 mg/Kg)降低了不对称百分比(圆柱测试)并增加了垂直探索(开放视野); KM-34 还减少了黑质致密部中胶质纤维酸性蛋白的过度表达并增加了酪氨酸羟化酶阳性细胞的数量。这些结果表明,KM-34 在体外表现出与线粒体保护和神经保护相关的生物学效应,此外,在体内 SNpc 中表现出与神经胶质反应和神经保护相关的生物学效应。我们认为 KM-34 可能是一种假定的神经保护剂,用于抑制与氧化应激和线粒体功能障碍相关的进行性神经退行性疾病。