生物钟基因BMAL1调节狼的自身免疫特征
Shuichiro Nakabo1, Donavon Sandoval-Heglund1, Norio Hanata1
1Systemic Autoimmunity Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), National Institutes of Health (NIH), Bethesda, MD, United States.
Frontiers in immunology
|December 12, 2024
概括
大脑和肌肉的基碳化合物受体核转位器样1 (Bmal1) 缺陷中性粒细胞加剧了小鼠的狼性炎. 人类SLE中性粒细胞中的Bmal1水平与疾病活性相关,这表明昼夜节律在狼病变发生过程中起着作用.
科学领域:
- 免疫学 免疫学 免疫学
- 时间生物学 时间生物学
- 类风湿病学 类风湿病学
背景情况:
- 中性粒细胞在全身性红斑狼 (SLE) 发病过程中发挥着关键作用.
- 时钟基因,如大脑和肌肉的基碳化合物受体核转位器样1 (Bmal1),调节中性粒细胞的功能.
- 在Bmal1中存在的缺陷会影响衰老和炎症反应.
研究的目的:
- 为了研究Bmal1在中性粒细胞中的作用,在小鼠狼的背景下.
- 在小鼠中检查狼的临床和免疫表现,这些小鼠在骨髓细胞中缺乏Bmal1.
- 分析人类SLE中性粒细胞中的Bmal1表达及其与疾病活性的相关性.
主要方法:
- 肌状况的Bmal1淘汰赛小鼠 (Bmal1Mye-/-) 和野生类型 (WT) littermates被用伊米基莫德 (IMQ) 治疗,以诱导狼.
- 评估了免疫反应,自身抗体,脏表现,中性粒细胞外细胞陷 (NET) 形成和基因表达.
- 在人类SLE中性粒细胞中量化了BMAL1表达,并与临床数据进行了比较.
主要成果:
- 虽然系统性炎症是可比的,但Bmal1Mye-/-小鼠显示抗dsDNA抗体增加和性免疫复合体沉积.
- 来自Bmal1Mye-/-小鼠的中性粒细胞表现出更高的四月表达和不成熟.
- 人类SLE中性粒细胞具有较低的BMAL1水平与较高的C3和较低的抗dsDNA水平相关.
结论:
- 中性粒细胞Bmal1缺乏与狼性炎严重程度的增加有关.
- 中性粒细胞昼夜节律的乱,特别是Bmal1,可以导致SLE的发病.
- 中性粒细胞中的Bmal1表达可能作为SLE疾病活动的生物标志物.
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