总素改善cGAS-STING介导的炎症和自身免疫性疾病,通过影响STING-IRF3结合
Chengwei Li1,2,3,4, Jincai Wen2,3, Xiaoyan Zhan2,3,4
1School of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou, China.
Chinese medicine
|August 15, 2024
概括
总坦辛 (TTN) 抑制了干扰素基因 (STING) 途径的循环GMP-AMP合成酶 (cGAS) -刺激器,为急性肝损伤和自身免疫性疾病提供了潜在的治疗方法. 这项研究阐明了TTN.
科学领域:
- 免疫学 免疫学 免疫学
- 药理学 药理学是指药理学的学科.
- 分子生物学分子生物学
背景情况:
- 循环GMP-AMP合成酶 (cGAS) 刺激干扰素基因 (STING) 途径对先天免疫至关重要,但其异常激活与自身免疫和炎症性疾病有关.
- 向抑制cGAS-STING通路为管理这种情况提供了一种治疗策略.
- 来自Salvia miltiorrhiza的全素 (TTN) 具有抗炎性质,但其保护急性肝损伤 (ALI) 和自身免疫性疾病的确切机制尚不清楚.
研究的目的:
- 通过准cGAS-STING通路,研究总坦辛 (TTN) 对急性肝损伤 (ALI) 和自身免疫性疾病的保护机制.
- 为了确定TTN如何调节cGAS-STING信号级联的异常激活.
- 在体内评估TTN在炎症和自身免疫性疾病的治疗潜力.
主要方法:
- 利用细胞和小鼠模型研究cGAS-STING通路的异常激活,包括DMXAA诱导的激活和ALI和自身免疫疾病的模型.
- 评估了关键通路蛋白,I型干扰素,干扰素刺激基因和炎症因子的表达,使用西式涂抹和qPCR.
- 研究了TTN对STING寡合化,蛋白质核转位和cGAS-STING通路内的蛋白质-蛋白质相互作用的影响.
主要成果:
- TTN显著抑制了STING和IRF3酸化,减少了I型干扰素,干扰素刺激基因和炎症因子的表达.
- TTN阻止了NF-κB (P65) 和IRF3的核转移,这是cGAS-STING通路激活的关键步骤.
- TTN没有影响STING寡合化或STING-TBK1/TBK1-IRF3复合体形成,但干扰了STING-IRF3结合,并在ALI和自身免疫模型中体内表现出治疗效应.
结论:
- 总坦辛 (TTN) 通过抑制cGAS-STING通路的异常激活,有效治疗急性肝损伤和自身免疫性疾病.
- TTN的机制涉及调节cGAS-STING通路内的关键蛋白相互作用和下游信号事件.
- 这些发现强调了TTN作为由cGAS-STING通路过活性驱动的疾病的有前途的治疗剂.
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