一种单克隆抗体,可选择性地识别与脑疟疾相关的PfEMP1蛋白
Nanna Dalgaard1, Rebecca W Olsen1, Yvonne Adams1
1Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
Scientific reports
|October 6, 2025
概括
一种新的抗体mAb02针对疟疾感染红细胞上的关键蛋白质 (PfEMP1). 这种抗体阻断了在大脑中的寄生虫粘附,为大脑疟疾 (CM) 治疗和诊断提供了潜在的可能性.
科学领域:
- 免疫学 免疫学 免疫学
- 传染性疾病 传染性疾病
- 分子生物学分子生物学
背景情况:
- 大脑疟疾 (CM) 往往是致命的,与感染的红细胞 (IEs) 附着于大脑血管有关.
- 在IE上的Plasmodium falciparum红细胞膜蛋白1 (PfEMP1) 通过特定的动机 (DBLβ动机) 介导这种粘附.
- 这种PfEMP1类型与宿主受体ICAM-1和EPCR结合,有助于CM的发病.
研究的目的:
- 为了功能性地表征一种新的单克隆抗体,mAb02,针对PfEMP1.1的DBLβ动机.
- 评估mAb02抑制PfEMP1结合ICAM-1和IE粘附的能力.
- 调查mAb02识别的表位及其对CM干预的影响.
主要方法:
- 产生一种小鼠单克隆抗体 (mAb02) 对抗 DBLβ动机域.
- 测试mAb02对DBLβ基因阳性PfEMP1蛋白和IE的识别.
- 评估mAb02抑制PfEMP1-ICAM-1结合和IE粘附的作用.
- 在DBLβ基因结构上对mAb02的表皮图映射.
主要成果:
- mAb02可以选择性地识别DBLβ基因阳性PfEMP1蛋白和IE.
- mAb02有效地抑制了PfEMP1与ICAM-1的结合,以及IE与ICAM-1的粘附.
- 抗体的表位位于一个保护的链接区域,对DBLβ-motif-ICAM-1相互作用至关重要.
- mAb02的目标是一个广泛保存的表位,涉及CM病变发生.
结论:
- mAb02的向是保留的PfEMP1表位,该表位与大脑疟疾病原发生有关.
- 这种抗体显示出开发针对CM的新型单克隆抗体基干预措施的潜力.
- mAb02可以识别能够引起脑疟疾的感染红细胞.
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