在1型糖尿病中,MHC II类抗原处理和呈现途径受到调节
Ambroise Gilles1, Lan Hu2, Francesca Virdis3
1Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ.
Journal of immunology (Baltimore, Md. : 1950)
|October 9, 2023
概括
1型糖尿病 (T1D) 破坏了MHCII类抗原处理途径,显示MHCII-CLIP水平的增加以及免疫细胞中的HLA-DM (DM) 和HLA-DO (DO) 表达的改变,这表明T1D患者的途径严重失调.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 内分泌学 在内分泌学.
背景情况:
- 对MHCII类分子的载荷对免疫反应至关重要,由HLA-DM (DM) 和HLA-DO (DO) 调节.
- 在1型糖尿病 (T1D) 中,MHCII-呈现异常,有助于免疫耐受性崩.
- 以前的研究缺乏对T1D患者MHCII通路活性的直接测量.
研究的目的:
- 在T1D患者中直接测量和分析MHCII抗原处理途径的活性.
- 调查T1D患者和健康对照者的免疫细胞中MHCII,MHCII-CLIP,DM和DO的水平.
主要方法:
- 流细胞计被用来量化周围血液B细胞,树突细胞和单细胞中的MHCII,MHCII-CLIP,DM和DO水平.
- 进行了对外围血液单核细胞 (PBMC) RNA的基因表达概况分析.
- 分析包括99名T1D患者和97名健康对照.
主要成果:
- 在所有分析的细胞类型中,MHCII水平在T1D患者和对照人群之间是可比的.
- 在T1D患者的所有APC亚组中,MHCII-CLIP水平显著升高 (B细胞高达3.4倍).
- 在T1D患者和对照人群中,DM和DO水平出乎意料地相似,尽管MHCII-CLIP增加了.
- 在T1D患者中增加的DMBmRNA,其残留的C与B细胞和树突细胞中增加的DM蛋白相关.
- 在T1D患者中,还观察到残留C-的DO水平增加.
结论:
- 在T1D患者中,MHCII抗原处理途径显著失调.
- 升高的MHCII-CLIP水平表明CLIP释放或MHCII稳定性受损.
- 对MHCII途径的差异调节可能与T1D个体的残留C水平有关.
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