发烧温度通过扰乱内皮质葡萄糖增强了Plasmodium falciparum的细胞粘附性
Viola Introini1, Rory Long1,2, Olawunmi Rashidat Oyerinde1
1European Molecular Biology Laboratory (EMBL) Barcelona, Barcelona, Spain.
bioRxiv : the preprint server for biology
|September 18, 2025
概括
发烧会加剧疟疾并发症,因为它会损害血管. 这项研究揭示了发烧导致内皮糖核流失,增加了寄生虫的附着性,并突出了疟疾的降热疗法.
科学领域:
- 血管生物学 血管生物学
- 传染病病理学 传染病病理学
- 生物医学工程 生物医学工程
背景情况:
- 发烧是感染期间宿主防御机制.
- 矛盾的是,发烧可以使疟疾的神经复杂症恶化.
- 发烧对疟疾内皮的影响尚不清楚.
研究的目的:
- 为了研究发烧对大脑和肺部微血管系统在疟疾的影响.
- 阐明发烧导致血管病理的机制.
- 评估针对发烧引起的血管损伤的潜在治疗策略.
主要方法:
- 开发一个3D"芯片上的发烧"模型,在发烧条件下模拟人类微血管.
- 评估红细胞-寄生虫 (iRBC) 和免疫细胞在40°C的流动下结合.
- 对内皮葡萄糖完整性和受体表达的分析 (EPCR,ICAM-1).
- 对矩阵金属蛋白酶 (MMP) 抑制剂进行评估,以保持甘氨酸的完整性.
主要成果:
- 短暂的发烧发作 (40°C) 显著增加了iRBC和免疫细胞对微血管的粘附.
- 发烧诱导的内皮葡萄糖流,暴露EPCR和ICAM-1受体.
- 通过使用MMP抑制剂维持葡萄糖的完整性,阻断了发烧诱导的细胞粘附.
- 发烧作为疟疾血管病理的宿主特定放大器.
结论:
- 发烧显著增加了疟疾的血管粘附和病理.
- 内皮质葡萄糖的流失是调解发烧有害影响的关键机制.
- 维护内皮质完整性或降低发烧的干预措施是严重疟疾的潜在治疗策略.
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