首页> 外文期刊>Pharmacology, Biochemistry and Behavior >Inhibitory effect of ethanol extract of Magnolia officinalis and 4-O-methylhonokiol on memory impairment and neuronal toxicity induced by beta-amyloid.
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Inhibitory effect of ethanol extract of Magnolia officinalis and 4-O-methylhonokiol on memory impairment and neuronal toxicity induced by beta-amyloid.

机译:厚朴和4-O-甲基厚朴酚乙醇提取物对β-淀粉样蛋白诱导的记忆障碍和神经元毒性的抑制作用。

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摘要

The components of the herb Magnolia officinalis have exhibited antioxidant and neuroprotective activities. In this study, we investigated effects of ethanol extract of M.officinalis and its major component 4-O-methylhonokiol on memory dysfunction and neuronal cell damages caused by A beta. Oral pretreatment of ethanol extract of M. officinalis (2.5, 5 and 10mg/kg) and 4-O-methylhonokiol (1mg/kg) into drinking water for 5 weeks suppressed the intraventricular treatment of A beta(1-42) (0.5 microg/mouse, i.c.v.)-induced memory impairments. In addition, 4-O-methylhonokiol prevented the A beta(1-42)-induced apoptotic cell death as well as beta-secretase expression. 4-O-methylhonokiol also inhibited H(2)O(2) and A beta(1-42)-induced neurotoxicity in cultured neurons as well as PC12 cells by prevention of the reactive oxygen species generation. 4-O-methylhonokiol also directly inhibited beta-secretase activity and A beta fibrilization in vitro. Thus, ethanol extract of M. officinalis may be useful for prevention of the development or progression of AD, and 4-O-methylhonokiol may be a major active component.
机译:厚朴木兰的成分具有抗氧化和神经保护作用。在这项研究中,我们调查了山茱M乙醇提取物及其主要成分4-O-甲基厚朴酚对Aβ引起的记忆障碍和神经元细胞损伤的影响。对饮用水中的厚朴成分(2.5、5和10mg / kg)和4-O-甲基厚朴酚(1mg / kg)的乙醇提取物进行口服预处理5周,抑制了脑室内对A beta(1-42)(0.5微克)的治疗/ mouse,icv)引起的记忆障碍。此外,4-O-甲基厚朴酚防止了Aβ(1-42)诱导的凋亡细胞死亡以及β分泌酶的表达。 4-O-甲基厚朴酚还可以通过抑制活性氧的生成来抑制H(2)O(2)和Aβ(1-42)诱导的培养的神经元以及PC12细胞中的神经毒性。 4-O-甲基厚朴酚还可以直接抑制体外的β-分泌酶活性和Aβ纤维化。因此,山茱M的乙醇提取物可用于预防AD的发生或发展,并且4-O-甲基厚朴酚可能是主要的活性成分。

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