允许性肺中性粒细胞在雄性细胞NADPH氧化酶缺乏的小鼠中促进结核免疫病原发生
Eunsol Choi1, Hong-Hee Choi1, Kee Woong Kwon1
1Department of Microbiology, Institute for Immunology and Immunological Disease, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul, South Korea.
PLoS pathogens
|August 23, 2024
概括
在缺乏NADPH氧化酶2 (NOX2) 的雄性小鼠中,颗粒细胞殖民地刺激因子 (G-CSF) 驱动不成熟的中性粒细胞,恶化结核病 (TB) 肺炎. 控制这些中性粒细胞可以减轻在NOX2缺乏条件下的结核病免疫病原发生.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 遗传学 是一个遗传学.
背景情况:
- 在慢性花瘤性疾病 (CGD) 中发现的NADPH氧化酶2 (NOX2) 缺乏,损害了对细胞抗菌功能至关重要的反应性氧物种的产生.
- 与X相关的NOX2缺乏会使个体易患严重的细菌感染,包括Mycobacterium tuberculosis (Mtb),通常伴有不受控制的炎症,但潜在的机制尚不清楚.
研究的目的:
- 在NOX2缺乏的环境中,研究宿主衍生因素在Mtb诱导的高炎症中的性别特异性作用.
- 确定在Mtb感染期间在雄性NOX2缺乏的小鼠中驱动病原发生的关键分子触发因素.
主要方法:
- 在雄性和雌性Nox2-/-和野生型 (WT) 老鼠中对Mtb诱导的肺病原发生的比较分析.
- 评估细菌负担,炎症性细胞因子,免疫细胞透 (中性粒细胞,淋巴细胞) 和中性粒细胞成熟标志物.
- 研究了G-CSF,IL-1α和IL-1β在调节结核病免疫病原发生的作用.
主要成果:
- 在Mtb感染期间,雄性Nox2-/-小鼠表现出增加的细菌负载,增加的促炎细胞因子 (G-CSF,TNF-α,IL-1α,IL-1β,IL-6),以及肺部过度不成熟的中性粒细胞.
- 这些不成熟的中性粒细胞允许Mtb复制,有助于疾病的进展.
- G-CSF被确定为诱导这些允许性中性粒细胞的关键因素,同时中和IL-1α/IL-1β恶化了病原发生.
结论:
- 颗粒细胞殖民地刺激因子 (G-CSF) 在雄性NOX2缺乏的小鼠中驱动不成熟的Mtb-允许性中性粒细胞的扩张,导致显著的肺高炎症和结核病免疫病原发生.
- 肺中性粒细胞的定量和质量控制对于减轻细胞氧化酶缺乏个体的结核病进展至关重要.
- 这些发现突出了性别特异性免疫反应,并确定G-CSF作为NOX2相关炎症性疾病的治疗点.
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