BTK驱动中性粒细胞激活以消毒抗真菌免疫
Jigar V Desai1, Marissa A Zarakas1, Andrew L Wishart1
1Fungal Pathogenesis Section, Laboratory of Clinical Immunology & Microbiology (LCIM), National Institute of Allergy & Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, Maryland, USA.
The Journal of clinical investigation
|May 2, 2024
概括
布鲁顿的氨酸激酶 (BTK) 对中性粒细胞抗真菌免疫对抗Aspergillus的免疫是至关重要的. 在癌症治疗中使用的BTK抑制剂可以损害这种防御,增加对真菌感染的易感性.
科学领域:
- 免疫学 免疫学 免疫学
- 菌类学 菌类学是指菌类学.
- 药理学 药理学是指药理学的学科.
背景情况:
- 布鲁顿的氨酸激酶 (BTK) 对于B细胞的发育和功能至关重要.
- BTK抑制剂 (BTKi) 用于治疗B细胞淋巴细胞恶性瘤.
- 菌感染,如阿斯伯吉洛症,是免疫功能低下患者的一个担忧.
研究的目的:
- 调查BTK在中性粒细胞介导的免疫监测中对真菌病原体,特别是Aspergillus的作用.
- 了解BTK调节中性粒细胞对真菌反应的机制.
- 探索BTK抑制对抗真菌免疫和潜在治疗策略的影响.
主要方法:
- 在暴露于真菌时,使用流细胞计和功能测试研究了人类中性粒细胞中的BTK激活.
- 研究了BTK抑制对中性粒细胞功能的影响,包括氧化爆发,脱粒化和真菌损伤.
- 利用具有中性粒细胞特异性Btk缺失的小鼠模型来评估对阿斯珀吉洛症的易感性.
- 在BTK抑制的背景下,研究了颗粒细胞-巨细胞殖民地刺激因子 (GM-CSF) 对中性粒细胞功能的影响.
主要成果:
- 在暴露于真菌时,BTK通过TLR2,Dectin-1和FcγR信号通路在人类中性粒细胞中被激活.
- 抑制BTK通过废除NADPH氧化酶子单元p40phox和GTPase RAC2激活,损害中性粒细胞介导的Aspergillus hyphae.
- 在小鼠中,中性粒细胞特异性的Btk缺失增加了由于中性粒细胞功能受损而导致阿斯珀吉洛症的易感性.
- 通过增强p47phox激活,GM-CSF部分恢复了中性粒细胞的功能.
结论:
- 在中性粒细胞介导的抗真菌免疫中,BTK起着至关重要的,以前未被认可的作用.
- 抑制BTK会损害宿主对抗阿斯珀吉洛症的防御能力.
- 向中性粒细胞中BTK信号传递对于理解和管理BTKi治疗患者的侵入性真菌感染至关重要.
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