发烧温度增加了环状阶段的Plasmodium falciparum对大脑内皮细胞的粘附
Fatou Joof1, Ruoqian Hu2, Karl B Seydel3,4
1Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA USA.
The Journal of infectious diseases
|September 10, 2025
概括
发烧可能会通过增加Plasmodium falciparum封存而加剧脑疟疾. 发烧暴露会加速寄生虫在大脑中的附着.
科学领域:
- 疟疾学 疟疾学
- 血管生物学 血管生物学
- 传染病的发病原因 传染病的发病原因
背景情况:
- 在微血管系统中封存感染Plasmodium falciparum的红细胞 (IE) 是疟疾毒性的关键.
- 成熟的IE阶段的隔离是可以理解的,但促进早期IE隔离的因素 (环状阶段) 仍然不清楚.
研究的目的:
- 为了研究发烧对环阶段IE封存的影响.
- 阐明了发烧引起的IE粘附性变化背后的分子机制.
主要方法:
- 利用3D人类大脑微血管模型来评估IE结合.
- 分析了涉及PfEMP1贩运的寄生虫基因的转录水平.
- 在环阶段IE上观察到的PfEMP1表面显示.
主要成果:
- 发烧暴露增加了输出寄生虫基因的转录水平,这对PfEMP1贩运至关重要.
- 在环阶段IE中加速PfEMP1表面显示导致结合的增加两倍.
- 寄生虫暴露增强了3D大脑微容器中未感染的红细胞 (UE) 的结合.
结论:
- 发烧可能通过上调粘附因子来促进Plasmodium falciparum的早期封存.
- 研究结果表明,发烧和寄生虫生物质在脑疟疾病原发生过程中起着协同作用.
- 需要进一步的研究来了解宿主发烧和寄生虫毒性机制之间的复杂相互作用.
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