埃莫丁通过直接与TNF-α结合来缓解类风湿性关节炎
Dingyan Lu1,2, Xudong Tian1,2, Taotao Cao1
1State Key Laboratory of Discovery and Utilization of Functional Components in Traditional Chinese Medicine, Engineering Research Center for the Development and Application of Ethnic Medicine and TCM (Ministry of Education), Guizhou Medical University, Guiyang, China.
埃莫丁直接向瘤亡因子-α (TNF-α),稳定其结构以阻止相互作用和减少炎症. 这种机制是埃莫丁抗风湿性关节炎 (RA) 作用的基础.
科学领域:
- 类风湿病学 类风湿病学
- 免疫学 免疫学 免疫学
- 药理学 药理学是指药理学的学科.
背景情况:
- 类风湿性关节炎 (RA) 是一种具有复杂机制的慢性炎症性疾病.
- 埃莫丁是一种天然化合物,已经显示出初步的抗RA活性.
- 埃莫丁抗RA作用的精确分子标和机制需要阐明.
研究的目的:
- 为了评估emodin的抗RA活性.
- 为了识别emodin的分子目标.
- 阐明埃莫丁在 RA 中治疗作用的机制.
主要方法:
- 原诱导性关节炎 (CIA) 鼠标模型和TNF-α诱导的L929细胞模型.
- 转录组分析,热蛋白质组分析 (TPP),药物亲和度响应目标稳定性 (DARTS),细胞热转移试验 (CETSA),AUF-LC/MS,SPR和BLI.
- 分子动力学模拟,ELISA,露西法酶记者基因测定和TNF-α诱导的MH7A细胞模型.
主要成果:
- 埃莫丁表现出抗RA活性,并将TNF-α确定为直接的分子标.
- 埃莫丁直接与TNF-α结合,稳定其三元体结构,并破坏TNF-α-TNFR1相互作用.
- 观察到TNF-α诱导的NF-κB激活的抑制和炎症媒介 (IL-6,IL-1β,COX2) 的下调.
结论:
- 埃莫丁直接准并稳定TNF-α,阻止其与TNFR1.1相互作用.
- 这种机制抑制了下游NF-κB通路的激活,减少了炎症.
- 埃莫丁通过直接调节TNF-α表现出强大的抗RA特性.
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