Protective effects of isoquercitrin on streptozotocin-induced neurotoxicity.

Protective effects of isoquercitrin on streptozotocin-induced neurotoxicity.
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DOI:
10.1111/jcmm.15658
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发表时间:
2020-09
影响因子:
5.3
通讯作者:
Li W
Li W
中科院分区:
医学2区
文献类型:
--
作者:
Chen L;Feng P;Peng A;Qiu X;Lai W;Zhang L;Li W

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阿尔茨海默病(AD)的特点是不可逆转的进行性记忆丧失,并且没有有效的治疗方法。最近,许多小分子天然产品已被确定具有神经保护功能,并对 AD 患者显示出有益的作用。因此,在当前的研究中,我们进行了小规模筛选,以确定天然化合物对链脲佐菌素 (STZ) 诱导的神经毒性和阿尔茨海默病 (AD) 的保护作用。我们发现,一种主要的黄酮类化合物异槲皮苷 (ISO) 通过抑制 STZ 诱导的细胞凋亡、线粒体功能障碍和氧化应激,表现出最有效的抗细胞毒性活性。 ISO 治疗在很大程度上挽救了 STZ 诱导的分化抑制并增强了 Neuro2a (N2a) 细胞的体外神经突生长。此外,口服ISO可以保护海马神经元免受STZ诱导的神经毒性,并显着改善STZ诱导的AD大鼠的认知和行为障碍。总的来说,我们的筛选将 ISO 确定为针对 STZ 引起的神经毒性和 AD 样变化的有效治疗候选者。
Alzheimer's disease (AD) is characterized by irreversible and progressive memory loss and has no effective treatment. Recently, many small molecule nature products have been identified with neuroprotective functions and shown beneficial effects to AD patients. In the current study, we thus performed a small scale screening to determine the protective effects of natural compounds on streptozotocin (STZ)‐induced neurotoxicity and Alzheimer's disease (AD). We found that a lead flavonoid compound, isoquercitrin (ISO) display the most effective anti‐cytotoxic activities via inhibiting STZ‐induced apoptosis, mitochondria dysfunction and oxidative stress. Treatment with ISO largely rescues STZ‐induced differentiation inhibition and enhances neurite outgrowth of Neuro2a (N2a) cells in vitro. Moreover, oral administration of ISO protects hippocampal neurons from STZ‐induced neurotoxicity and significantly improves the cognitive and behavioural impairment in STZ‐induced AD rats. In general, our screening identifies ISO as an effective therapeutic candidate against STZ‐induced neurotoxicity and AD‐like changes.
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