抗素抗体识别了与类风湿性关节炎相关的T细胞表位,这些表位被细菌L-asparaginase修饰
Tsvetelina Batsalova1, Ivanka Teneva1, Krum Bardarov2
1Faculty of Biology, Paisii Hilendarski University of Plovdiv, Plovdiv, Bulgaria.
Central-European journal of immunology
|October 30, 2023
概括
细菌L-asparaginase修改了类风湿性关节炎 (RA) 患者的T细胞表观,导致交叉反应性抗蛋白抗体 (ACPAs) 识别特定的动机. 这种修改可能会将T细胞原始化与RA的自身抗体发育联系起来.
科学领域:
- 免疫学 免疫学 免疫学
- 类风湿病学 类风湿病学
- 生物化学 生物化学
背景情况:
- 抗素蛋白抗体 (ACPAs) 在类风湿性关节炎 (RA) 发病过程中至关重要.
- 细菌触发物,如失生症,可能会启动ACPA的产生.
- T淋巴细胞和表皮细胞对于RA的发病和发展至关重要.
研究的目的:
- 调查细菌L-asparaginase是否会在II型原体 (CII) 中改变与RA相关的T细胞表位.
- 为了确定这些修饰后的表位是否被RA患者的ACPAs识别.
- 探索T细胞原始化和抗修饰蛋白抗体 (AMPA) 发展之间的联系.
主要方法:
- 用LC-MS/MS分析检测L-asparaginase对T细胞表位的修饰.
- 使用早期RA患者和健康受试者的血清进行ELISA测试.
- 评估T细胞对修饰表位的识别.
主要成果:
- 细菌L-asparaginase在II型原体内成功修改了研究的T细胞表位.
- 来自RA患者的ACPA阳性血清对修改的CII表位素呈现交叉反应,而不是无关.
- 修改的主要免疫主导T细胞表位Gal264-CII259-273保留了T细胞识别能力.
结论:
- 交叉反应的ACPA可能会在CII.中识别"碳基-Gly-Pro"模式.
- 细菌酶对T细胞表皮质的酶性修饰可能会在RA中弥合T细胞原始化和AMPA发育.
- 这些发现提供了有关类风湿性关节炎病因和病原学的见解.
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