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微RNA-218-5p-Ddx41轴通过降低帕金森病小鼠模型中的I型干扰素反应来抑制微质介导的神经炎症

Danlei Wang¹, Hongling Gao², Qixiong Qin¹

¹Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.

Journal of translational medicine

|January 16, 2024

概括

微RNA-218-5p (miR-218-5p) 通过减少神经炎症和保护多巴胺基神经元,保护帕金森病 (PD). 这种微RNA针对Ddx41,为PD提供了潜在的治疗策略.

科学领域:

神经科学是一个神经科学.
分子生物学分子生物学
免疫学免疫学免疫学

背景情况:

帕金森病 (PD) 涉及黑体 (SN) 中的多巴胺基 (DA) 神经元损失,微质驱动的神经炎症是关键因素.
微RNA-218-5p (miR-218-5p) 在PD病变和神经炎症中的作用尚不清楚.

研究的目的:

为了研究miR-218-5p在1-甲基-4--1,2,3,6-四胺 (MPTP) 诱导的帕金森病小鼠模型中的作用.
阐明 miR-218-5p 对神经炎症和神经元存活的影响的分子机制.

主要方法:

在MPTP治疗小鼠的黑质体 (SN) 中通过立体毒性输液过度表达miR-218-5p.
评估多巴胺能 (DA) 神经元损失,微质炎症和运动功能.
RNA测序 (RNA-seq) 来识别受调的通路和双露西法酶记者测定来确认目标基因,包括Ddx41.1.
在体外研究中使用BV2微质细胞,用1-甲基-4-烯 (MPP+) 条件介质 (CM) 刺激.

主要成果:

在MPTP诱导的小鼠和MPP+治疗的BV2细胞中观察到miR-218-5p表达的减少.
在小鼠中,miR-218-5p过度表达改善了微质炎症,DA神经元损失和运动缺陷.
RNA-seq发现MPTP小鼠的I型干扰素 (IFN-I) 途径显著上调,这种效应被miR-218-5p逆转.
Ddx41被证实是直接的miR-218-5p标;miR-218-5p/Ddx41调节抑制了BV2细胞中的IFN-I信号传递和炎症性细胞因子产生.

结论:

miR-218-5p通过抑制微质介导的神经炎症和通过Ddx41/IFN-I通路保护DA神经元来产生神经保护作用.
miR-218-5p-Ddx41轴代表了帕金森病的潜在治疗标.

关键词:

死亡盒螺旋酶41的死亡盒.干扰素干扰素干扰素微质细胞中的微质细胞神经炎症是一种神经炎症.帕金森病是帕金森氏症的一种疾病.在 miR-218-5p 中使用.

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