通过IFN-γ/STAT1通路和金属蛋白酶调节的微质中的LAG-3表达
Yuta Morisaki1, Motoki Ohshima1, Hikaru Suzuki1
1Division of Pharmacology, Faculty of Pharmacy, Keio University, Tokyo, Japan.
Frontiers in cellular neuroscience
|November 29, 2023
概括
淋巴细胞激活基因-3 (LAG-3) 在微质中的表达是由干扰素- (IFN-γ) 通过STAT1通路诱导的. 这种免疫检查点分子分子.
科学领域:
- 神经免疫学 神经免疫学
- 具有天生的免疫力.
- 中枢神经系统 (CNS) 恒常状态 恒常状态
背景情况:
- 微质细胞是中枢神经系统的常驻免疫细胞,对于维持大脑平衡至关重要.
- 不调节的微质激活在各种中枢神经系统疾病中有助于神经毒性.
- 控制微质激活的机制,特别是涉及免疫检查点分子,仍然不完全理解.
研究的目的:
- 研究激活微质中的免疫检查点分子的表达机制.
- 阐明干扰素- (IFN-γ) 和STAT1通路在调节微质免疫检查点表达中的作用.
- 描述微质细胞中淋巴细胞激活基因-3 (LAG-3) 的调节.
主要方法:
- 分析BV2微质细胞系和初级微质细胞中的免疫检查点分子表达.
- 利用针对STAT1的siRNA来研究IFN-γ诱导的LAG-3表达.
- 评估了金属蛋白酶抑制剂 (ADAM10,ADAM17) 对可溶性LAG-3产生的影响.
- 将IFN-γ注入小鼠的大中,以评估脊柱微质中的LAG-3表达.
- 研究了LAG-3对IFN-γ激活微质中的氧化产生的影响.
主要成果:
- IFN-γ刺激提高了微质中淋巴细胞激活基因-3 (LAG-3) 的膜结合和可溶性形式的上调.
- IFN-γ诱导的LAG-3表达依赖于STAT1信号通路.
- 可溶性LAG-3的产生由金属蛋白酶介导,包括ADAM10和ADAM17.
- 在体内IFN-γ的使用增加了脊柱微质中的LAG-3表达.
- 在IFN-γ激活的微质中,LAG-3的淘汰增强了氧化的产生.
结论:
- 微质LAG-3表达主要由IFN-γ-STAT1信号轴诱导.
- 可溶性LAG-3通过金属蛋白酶对膜结合的LAG-3的蛋白质分解生成.
- LAG-3 负面调节微质前炎性反应,例如氧化的产生.
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