断绝IFN-γ-依赖的反循环在皮质性关节炎综合征与皮质性和
Wonyong Lee1, Deborah L Stone1, Patrycja Hoffmann1
1Inflammatory Disease Section, National Human Genome Research Institute, Bethesda, Maryland, USA.
Annals of the rheumatic diseases
|February 26, 2024
概括
在PSTPIP1中发生的突变会通过激活皮林炎酶激活PAPA综合征,从而导致涉及IL-18和IFN-γ的积极反循环. 雅克抑制剂在治疗这种自身炎症性疾病方面表现有前途.
科学领域:
- 免疫学 免疫学 免疫学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 帕帕综合征 (pyogenic关节炎,pyoderma gangrenosum和) 是一种罕见的遗传性自身炎症性疾病.
- 它是由PSTPIP1基因突变引起的,导致患者患病率显著.
研究的目的:
- 为了阐明PAPA综合征病原体背后的分子机制.
- 为了研究炎症酶激活在疾病中的作用.
- 评估Janus激酶 (JAK) 抑制剂的治疗潜力.
主要方法:
- 基因淘汰和淘汰鼠标模型的生成.
- 使用了人类髓状细胞系 (THP1,U937) 和初级细胞 (PBMC).
- 采用了包括siRNA淘汰,部位定向突变发生,免疫试验,共免疫沉和免疫阻塞在内的技术,以研究炎症酶激活和细胞因子产生. 在体外和体内评估了JAK抑制剂的反应性.
主要成果:
- 与PAPA相关的PSTPIP1突变在人类骨髓细胞系模型中激活了pyrin炎症酶.
- 皮林炎症酶激活独立于规范途径,并被破坏皮林相互作用的PSTPIP1突变阻止.
- 对PAPA患者单细胞的IFN-γ原始化诱导IL-18通过pyrin通路释放. 在PAPA患者的皮肤病变中发现了丰富的IFN-γ.
- 用JAK抑制剂治疗减少了IFN-γ介导的pyrin诱导和IL-18的ex vivo释放. 五名PAPA患者在JAK抑制剂治疗与IL-1抑制相结合后出现了临床改善.
结论:
- 与PAPA相关的PSTPIP1突变启动了pyrin-IL-18-IFN-γ正反循环驱动疾病活动.
- 这一途径代表了PAPA综合征中JAK抑制的可行的治疗标.
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