中国神经再生研究(英文版) ›› 2018, Vol. 13 ›› Issue (10): 1827-1832.doi: 10.4103/1673-5374.238714

• 原著:退行性病与再生 • 上一篇    下一篇

山柰酚可减轻卵巢切除阿尔茨海默病模型大鼠的认知缺陷

  

  • 收稿日期:2018-07-06 出版日期:2018-10-15 发布日期:2018-10-15
  • 基金资助:

     伊朗Guilan医学科学研究和技术大学资助

Kaempferol attenuates cognitive deficit via regulating oxidative stress and neuroinflammation in an ovariectomized rat model of sporadic dementia

Somayeh Kouhestani1, 2, Adele Jafari2, Parvin Babaei1, 2, 3   

  1. 1 Cellular and Molecular Research Center, Faculty of Medicine, Guilan University of Medical Sciences, Rasht, Iran
    2 Department of Physiology, Faculty of Medicine, Guilan University of Medical Sciences, Rasht, Iran
    3 Neuroscience Research Center, Guilan University of Medical Sciences, Rasht, Iran
  • Received:2018-07-06 Online:2018-10-15 Published:2018-10-15
  • Contact: Parvin Babaei, PhD,p_babaei@gums.ac.ir.
  • Supported by:

    This study was supported by a grant from Research and Technology Chancellor of Guilan University of Medical Sciences, Iran (No.IR.GUMS. REC. 1936.51).

摘要:

枸杞提取物的主要类黄酮,山萘酚已被证实具有抗氧化、抗炎和抗神经毒性作用,但其对阿尔茨海默病的作用及机制尚不明了。为了解山奈酚对卵巢切除后散发性阿尔茨海默病模型大鼠认知障碍的影响,及该影响与海马氧化应激、细胞凋亡、脂质过氧化和神经炎症的可能关系。(1)实验对32只雌性Wistar大鼠进行了卵巢切除,并给予其脑室内注射链脲佐菌素(3mg/kg,2次,间隔1d)以建立散发性阿尔茨海默病的模型。然后进行腹腔内注射山奈酚(10mg/kg)21d。(2)使用Morris水迷宫评估大鼠的空间学习和记忆功能。以酶联免疫吸附法测定海马组织氧化应激状态和炎症因子及细胞凋亡相关因子细胞色素c水平。(3)结果显示,山奈酚干预后,模型大鼠在Morris水迷宫中的逃避潜伏期和搜索距离明显缩短,海马组织中超氧化物歧化酶和谷胱甘肽的抗氧化酶水平明显升高,肿瘤坏死因子-α和丙二醛水平明显下降;而细胞色素c水平变化不明显。(4)实验结果表明,山奈酚能够减轻卵巢切除后的阿尔茨海默病模型大鼠的学习记忆功能障碍,可能是通过提高海马抗氧化能力,以及减轻神经炎症反应实现的。

orcid:0000-0003-4870-8182(Parvin Babaei)

关键词: 阿尔茨海默病, 山奈酚, 氧化应激, 神经炎症, 细胞凋亡, 神经再生

Abstract:

Alzheimer’s disease (AD) is associated with oxidative stress, and ultimately results in cognitive deficit. Despite existing literature on the pathophysiology of AD, there is currently no cure for AD. The present study investigated the effects of kaempferol (Kmp) isolated from the extract of Mespilus germanica L. (medlar) leaves on cognitive impairment, hippocampal antioxidants, apoptosis, lipid peroxidation and neuro-inflammation markers in ovariectomized (OVX) rat models of sporadic AD. Kaempferol, as the main flavonoid of medlar extract has been previously known for anti-oxidative, anti-inflammatory and anti-neurotoxic effects. Thirty-two female Wistar rats were ovariectomized, and randomly divided into four groups: sham, OVX + saline, OVX + streptozotocin (STZ) + saline, OVX + STZ + Kmp. Animals received intracerebroventricular injection of STZ (3 mg/kg, twice with one day interval) to establish models of sporadic AD. Intraperitoneal injection of Kmp (10 mg/kg) for 21 days was performed in the OVX + STZ + Kmp group. Spatial learning and memory of rats were evaluated using a Morris water maze. Finally, brain homogenates were used for biochemical analysis by enzyme-linked immunosorbent assay. The results showed a significant improvement in spatial learning and memory as evidenced by shortened escape latency and searching distance in Morris water maze in the OVX + STZ + Kmp group compared with the OVX + STZ group. Kmp also exhibited significant elevations in brain levels of antioxidant enzymes of superoxide dismutase and glutathione,while reduction in tumor necrosis factor-α and malondialdehyde. Our results demonstrate that Kmp is capable of alleviating STZ-induced memory impairment in OVX rats, probably by elevating endogenous hippocampal antioxidants of superoxide dismutase and glutathione, and reducing neuroinflammation. This study suggests that Kmp may be a potential neuroprotective agent against cognitive deficit in AD.

Key words: Alzheimer’s disease, oxidative stress, neuroinflammation, Mespilus germanica L., Kaempferol, neural regeneration