基础科学和病原发生学
Meenakshi Umar1, Saifudeen Ismael1, Gregory J Bix1,2,3
1Department of Neurosurgery, Clinical Neuroscience Research Center, Tulane University School of Medicine, New Orleans, LA, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
概括
SARS-CoV-2 感染会加剧MTHFR 缺乏,导致血脑屏障问题和神经炎症. 这可能会增加帕金森氏症.
科学领域:
- 神经科学是一个神经科学.
- 病毒学 病毒学
- 遗传学 是一个遗传学.
背景情况:
- 甲四叶酸减少酶 (MTHFR) 对单碳代谢至关重要,影响神经递质合成和DNA甲基化.
- MTHFR多态性与血管痴呆,帕金森病 (PD) 和COVID-19严重程度的增加有关.
- 缺乏MTHfr的小鼠表现出认知缺陷和增加PD类病理.
研究的目的:
- 为了调查SARS-CoV-2感染是否在MTHFR缺乏的小鼠中加速血管痴呆和PD.
- 模拟MTHFR缺乏对SARS-CoV-2引起的神经效应的影响.
主要方法:
- 患有MTHFR缺陷 (Mthfr+/-) 和野生型 (WT) littermates的小鼠感染了适应小鼠的SARS-CoV-2 (MA10) 或模拟病毒.
- 监测小鼠减肥情况,并分析组织病毒载量,炎症,血脑屏障 (BBB) 完整性和PD标志物.
- 进行了血代谢分析,以评估生化变化.
主要成果:
- 在Mthfr+/-和WT小鼠中,MA10感染导致了类似的体重减轻和肺病毒标位,没有可检测的脑病毒.
- Mthfr+/-小鼠表现出增加的BBB干扰,神经炎症 (IL-1β,微质) 和降低的血多巴胺.
- 在Mthfr+/-小鼠中,SARS-CoV-2感染降低了多巴氨基神经元和铁酸酶水平,同时增加了Mthfr+/-小鼠中的α-synuclein.
结论:
- 在MTHFR缺乏的小鼠中,SARS-CoV-2感染会诱导BBB功能障碍,神经炎症和多巴胺减少.
- 这项研究表明,在SARS-CoV-2感染后,MTHFR缺乏的人群中,帕金森病进展的风险增加.
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