格拉姆阴性无氧体引起了强大的角质细胞免疫反应,对HS病变发生有潜在的见解
Samuel C Williams1,2, Sandra Garcet1, Hong Hur1
1Laboratory of Investigative Dermatology, The Rockefeller University, New York, New York, USA.
Experimental dermatology
|April 30, 2024
概括
常见于补性水炎 (HS) 的グラム阴性厌氧细菌强烈激活皮肤角质细胞,驱动炎症和IL-17通路. 这突显了它们在HS中的致病作用,并暗示了新的治疗点.
科学领域:
- 皮肤病学 皮肤病学
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
背景情况:
- 补充性水炎 (HS) 是一种慢性皮肤疾病,其特点是炎症和细菌存在.
- 在HS病变中的微生物群是多微生物的,随着疾病的严重程度的增加,格拉姆阴性无氧 (GNA) 细菌增加.
研究的目的:
- 调查HS及其相关微生物群之间的致病关系.
- 为了定义质细胞对常见于HS病变中的细菌的反应.
主要方法:
- 正常的人类角质细胞与被热杀死的细菌菌株 (Prevotella spp.,Fusobacterium nucleatum,Staphylococcus spp.) 的同时化. ) 的情况.
- 基因表达的分析 (RNAseq,RT-qPCR) 和蛋白质量测量在角质细胞.
- 转录组资料与HS患者样本的比较.
- 鼠类皮内注射模型和抑制剂研究 (TLR4,JAK).
主要成果:
- 格拉姆阴性厌氧细菌 (GNA),特别是Fusobacterium nucleatum,与格拉姆阳性物种相比,在角质细胞中诱导的炎症基因转录 (CXCL8,IL17C,IL6,TNF) 显著更高.
- F.核和普雷沃特拉种类. 强烈诱导IL-17通路,显示与HS患者的转录组重叠.
- 在小鼠模型中,GNAs促进了中性粒细胞和巨细胞的招募.
- TLR4和JAK抑制剂减少了细菌诱导的细胞因子产生.
结论:
- 健康的皮肤角质细胞对HS中普遍存在的GNAs产生强烈的炎症反应,与它们对グラム阳性细菌的反应不同.
- GNAs刺激HS相关基因,包括IL-17通路中的基因,这表明其具有关键的病原性作用.
- 细菌与激活的角质细胞的密切关联以及观察到的免疫透支持HS中GNAs的致病潜力,为未来的治疗提供了点.
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