Intrastriatal lipopolysaccharide injection induces parkinsonism in C57/B6 mice.

Intrastriatal lipopolysaccharide injection induces parkinsonism in C57/B6 mice.
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DOI:
10.1002/jnr.22012
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发表时间:
2009-06
影响因子:
4.2
通讯作者:
Bing, Guoying
Bing, Guoying
中科院分区:
医学3区
文献类型:
--
作者:
Hunter, Randy L.;Cheng, Baohua;Choi, Dong-Young;Liu, Mei;Liu, Shuwei;Cass, Wayne A.;Bing, Guoying

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炎症在帕金森氏病(PD)的病因和进展中的作用已被假设。在这项研究中,我们建立、表征和验证了第一个进行性帕金森病相关小鼠模型(C57/B6)--纹状体内注射脂多糖(LPS)。我们在黑质显示了进行性和特异性的多巴胺能神经变性,伴随着纹状体多巴胺耗竭和进行性行为障碍,使用帕金森病药物L-多巴可以缓解这种情况。我们重点研究了NO在炎症诱导的细胞死亡中的作用,认为诱导型一氧化氮合酶的表达在内毒素诱导的多巴胺能神经元进行性丢失中起作用,而不是在最初的丢失中起作用。有了这个模型,未来的研究可以在基因敲除小鼠身上进行,以研究炎症诱导的神经退化的其他潜在机制。此外,由于大多数帕金森病药物是在动物模型中筛选的,因此该模型可用于在更临床相关的时间(即在注射脂多糖之后但在帕金森病相关的行为损害表现之前)筛选帕金森病的治疗药物。因此,这种与帕金森病相关的新模型应该被进一步表征,并被强烈地视为未来药物研究的工具。
A role for inflammation has been hypothesized in the etiology and progression of Parkinson’s disease (PD). In this study, we generated, characterized, and validated the first progressive PD-related mice model (C57/B6)-intrastriatal injection of lipopolysaccharide (LPS). We showed progressive and specific dopaminergic neurodegeneration in the substantia nigra, which is accompanied by striatal dopamine depletion and progressive behavioral impairment, which was alleviated by the use of the PD drug L-Dopa. We focused on the role of NO in inflammation-promoted cell death and suggest that the expression of the inducible nitric oxide synthase plays a role in the progressive loss of dopaminergic neurons but not the initial loss induced by LPS. With this model future research can be done in gene knockout mice to study other potential mechanisms of inflammation-induced neurodegeneration. In addition, this model can be used to screen therapeutics for PD at a more clinically relevant time (i.e., after LPS injection but before manifestation of PD-related behavioral impairment), as most PD drugs are screened in animal models where inhibitors are given pre-disease induction. Thus, this novel PD-related model should be further characterized and strongly considered as a tool for future drug studies.
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