在Leishmania major感染期间,HIF-α信号调节巨细胞的炎症反应
bioRxiv : the preprint server for biology
|September 10, 2024
概括
主体炎症,而不是寄生虫,在莱什马尼亚感染期间会在巨细胞中触发HIF-α信号. 这种信号抑制了促炎环境中的蛋白质翻译,突出了皮肤莱什曼病的新治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 热带疾病 热带疾病
背景情况:
- 皮肤莱什曼病 (CL) 是一种被忽视的热带疾病,在全球范围内影响着1200万人.
- 目前的治疗方法往往是无效的,并且没有疫苗存在,需要新的治疗点.
- 之前的研究将巨细胞HIF-α (低氧诱导因子-α) 与莱什马尼亚主要感染中的伤口愈合通过淋巴血管生成联系起来.
研究的目的:
- 为了研究巨细胞HIF-α信号传递独立于淋巴血管生成的作用.
- 为了确定寄生虫或宿主炎症是否在损伤微环境中驱动髓状细胞HIF-α信号传递.
- 为了阐明在莱什曼尼亚感染期间与HIF-α激活相关的转录和通路变化.
主要方法:
- 来自未损坏或删除HIF-α信号的小鼠巨细胞的RNA测序.
- 在标准和预炎症条件下感染Leishmania主要寄生虫.
- 转录基因数据的途径分析,以确定受影响的生物过程.
主要成果:
- 单独莱什马尼亚主要感染就诱导了轻微的HIF-α-依赖的转录基因变化.
- 结合感染和促炎性刺激导致显著的HIF-α依赖和独立的转录基因变化.
- 发现HIF-α抑制了蛋白质翻译途径,特别是在感染期间的炎症前驱环境中.
结论:
- 主体的炎症反应,而不是寄生虫本身,是莱什马尼亚感染期间骨髓状HIF-α信号传递的主要驱动因素.
- 巨细胞中的HIF-α激活在调节宿主对感染的反应中起着至关重要的作用,特别是在炎症条件下抑制蛋白质转化.
- 这些发现确定了巨细胞HIF-α信号传递作为治疗皮肤莱什曼病的潜在治疗标.
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