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骨质细胞和骨质细胞系中的MyD88差异性控制了恒常性和疟疾中的骨重塑
Jalal Alshaweesh1,2,3, Rashmi Dash1,4, Michelle S J Lee1,2,3
1Division of Malaria Immunology, Department of Microbiology and Immunology, The Institute of Medical Science (IMSUT), The University of Tokyo, Tokyo 108-8639, Japan.
International immunology
|April 20, 2024
概括
疟疾通过通过MyD88信号传递影响骨质母细胞 (OBs) 和骨质母细胞 (OCs) 而导致骨质损失. 在OC中,MyD88部分控制了疟疾引起的炎症,而在OB中,MyD88对骨形成至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 骨生物学 骨生物学 骨生物学
- 疟疾学 疟疾学
背景情况:
- 慢性骨损失是疟疾的并发症,与骨髓炎症和MyD88信号传递有关.
- 在疟疾引起的骨损失中,MyD88在骨质细胞 (OB) 和骨质细胞 (OC) 前体中的特定作用尚不清楚.
研究的目的:
- 调查MyD88信号传递在OB和OC系在疟疾感染和生理条件期间骨代谢中的细胞内在作用.
- 阐明MyD88在OBs与OCs中对疟疾相关的骨损失的具体贡献.
主要方法:
- 使用Lox-Cre系统,在小鼠的OB和OC血统中专门消耗MyD88.
- 施用Plasmodium yoelii的非致命感染. 没有致命的感染.
- 通过微计算机断层扫描评估骨密度和骨质形成,并测量胰岛素类生长因子-1水平.
主要成果:
- 在OC前体中MyD88的耗尽减少了疟疾引起的椎骨损失,表明MyD88在OCs中控制炎症调解者的作用.
- 令人惊的是,OB前体中MyD88的耗尽导致骨质减少,甚至在生理条件下骨形成率降低.
- 当MyD88在OB中耗尽时,胰岛素样生长因子-1水平显著降低.
结论:
- MyD88信号传递对于骨质母细胞分化和骨形成至关重要.
- 骨质细胞中的MyD88信号在控制疟疾引起的炎症媒介和随后的骨病理学方面起着部分作用.
- 研究结果表明,骨病理的新型治疗点,特别是在疟疾流行地区.
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