通过结合Mccc1和Pcca来调节BCAA降解,LncBADR促进了T细胞介导的自身免疫
Yanting Lei1, Jing Yu1, Xinrui Huo2
1Department of Neurobiology, Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, School of Basic Medical Sciences, Harbin Medical University, Harbin, Heilongjiang, 150081, China.
Journal of neuroinflammation
|September 27, 2025
概括
长非编码RNA BADR (lncBADR) 通过控制分支链氨基酸 (BCAA) 代谢来调节T细胞功能. 抑制IncBADR通过减少BCAA积累和T细胞炎症来改善自身免疫性疾病.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 代谢调节 代谢调节 代谢调节
背景情况:
- T细胞功能障碍驱动自身免疫性疾病,但调节机制尚不清楚.
- 长非编码RNAs (lncRNAs) 参与免疫调节,但它们在T细胞中的作用需要阐明.
- 了解T细胞中的IncRNA功能对于自身免疫性疾病研究至关重要.
研究的目的:
- 研究lncRNA BADR (lncBADR) 在T细胞功能和自身免疫性疾病中的作用.
- 阐明 lncBADR 调节分支链氨基酸 (BCAA) 代谢的机制.
- 探索 lncBADR 和 BCAA 代谢作为自身免疫性疾病的潜在治疗点.
主要方法:
- 产生T细胞特异的lncBADR淘汰赛小鼠 (T细胞lncBADR-/-).
- 实验性自身免疫脑膜炎 (EAE) 在淘汰小鼠中的严重程度的评估.
- 机制研究包括酶结合测定 (Mccc1,Pcca),BCAA水平测量和信号通路分析 (mTOR-Stat1).
- 在高BCAA养的体内实验中评估保护作用的逆转.
主要成果:
- 在T细胞lncBADR-/-小鼠中,EAE症状显著减少.
- 发现lncBADR通过与Mccc1和Pcca结合来抑制BCAA降解,导致BCAA在T细胞中积累.
- 累积的BCAA激活了mTOR-Stat1通路,增加了IFN-γ的分泌,并加剧了EAE.
- 淘汰IncBADR恢复了BCAA降解,减少了IFN-γ,并抑制了致病性T细胞功能.
- 高BCAA养部分逆转了IncBADR淘汰的保护作用.
结论:
- lncBADR通过抑制BCAA降解和促进致病性T细胞反应来促进自身免疫性炎症.
- 调节 lncBADR 或 BCAA 代谢是对自身免疫性疾病的一种有前途的治疗策略.
- 这项研究为lncRNAs,新陈代谢和T细胞介导的自身免疫之间的相互作用提供了新的见解.
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