引起ALS的基因会影响MHCII类抗原呈现途径
Binkai Chi1, Muhammet M Öztürk1, Christina L Paraggio1
1Department of Cell Biology, Blavatnik Institute, Harvard Medical School, Boston, MA 02115.
概括
与ALS相关的蛋白质的突变破坏了主要基因相容性复合体II (MHC II) 途径. 这种免疫系统衰竭可能会损害运动神经元的保护,从而导致ALS的进展.
科学领域:
- 神经科学是一个神经科学.
- 免疫学 免疫学 免疫学
- 遗传学 是一个遗传学.
背景情况:
- 肌缩性侧面硬化症 (ALS) 与RNA/DNA结合蛋白的突变有关.
- 驱动ALS病变的精确机制在很大程度上是未知的.
- 免疫路径在ALS中的作用是一个正在积极研究的领域.
研究的目的:
- 研究ALS相关蛋白质对主要基因相容性复合II (MHC II) 途径的影响.
- 确定ALS的细胞模型中是否存在MHC II表达中断.
- 探索ALS中这些干扰的潜在免疫后果.
主要方法:
- 在HeLa和人类微质细胞中利用了ALS相关蛋白质 (FUS,EWSR1,TAF15,MATR3) 的基因淘汰和淘汰.
- 评估了MHC II成分的表达水平,包括HLA-DR和转录因子CIITA.
- 检查了来自患者特异性诱导多能干细胞 (FUSR495X和C9ORF72突变) 的造血原生细胞 (HPC) 中的MHC II表达.
主要成果:
- 在具有被淘汰/被淘汰的ALS基因的细胞中观察到HLA-DR子单元的下调.
- 对MHC II转录因子CIITA的损失被确定为减少MHC II表达的原因.
- 在从FUSR495X和C9ORF72 ALS患者的iPSC中获得的HPC中证实了MHC II表达的破坏.
结论:
- 与ALS相关的蛋白质在调节MHC II抗原呈现途径方面发挥着至关重要的作用.
- 在HPC中MHC II表达的受损表明ALS的潜在全球免疫系统衰竭.
- 这种免疫功能障碍可能会损害运动神经元的保护,导致ALS的发展和进展.
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