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在类风湿性关节炎中调节与中性粒细胞相关的RNASET2表达
Mauro Passari1, Sara Scutera2, Tiziana Schioppa1,3
1Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, Brescia, 25123, Italy.
Scientific reports
|November 5, 2024
概括
中性粒细胞在免疫反应和中性粒细胞外细胞陷 (NET) 形成期间释放RNASET2,一种炎症信号. 较高的RNASET2水平与类风湿性关节炎 (RA) 的发病和严重程度相关,这表明它在自身免疫性疾病的发病过程中的作用.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 类风湿病学 类风湿病学
背景情况:
- 中性粒细胞 (PMNs) 对于天生的免疫非常重要,释放颗粒含量并形成中性粒细胞外陷 (NETs).
- RNASET2,一种酸性核糖核酶,在炎症过程中作为一个警报信号.
- 遗传研究将RNASET2与诸如类风湿性关节炎 (RA) 等自身免疫性疾病的易感性增加联系起来.
研究的目的:
- 研究中性粒细胞中RNASET2的表达和局部化.
- 确定RNASET2与NET的关联及其在炎症条件中的作用.
- 探索循环RNASET2水平与自身免疫性关节炎的发展和严重程度之间的相关性.
主要方法:
- 人类PMN和RA患者的突细胞活检的免疫化.
- 在中性粒细胞成熟过程中对RNASET2表达的分析.
- 用PMA,Nigericin和免疫复合体刺激PMN.
- 在小鼠模型 (STIA,CIA) 和RA患者血清中评估RNASET2水平.
主要成果:
- RNASET2在成熟的人类PMN中表达,并与颗粒和NET局部化.
- 在小鼠关节炎模型和RA患者的炎症关节内,RNASET2存在于PMN和巨细胞中.
- 循环中的RNASET2水平与小鼠模型和RA患者的疾病发病和严重程度具有积极的相关性.
结论:
- 中性粒细胞是RNASET2.2的重要来源.
- RNASET2表达和循环水平升高与类风湿性关节炎的发病有关.
- RNASET2可能在免疫媒介炎症疾病的发展和进展中发挥作用.
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