德克斯特旋转基努伦因通过抑制M1巨细胞介导的炎症来抑制急性排斥
Yufeng Zhao1,2,3, Jiaheng Wu2,3, Yuling Li4
1Department of Kidney Transplantation, Zhongshan Hospital, Fudan University, Shanghai, China.
EMBO molecular medicine
|February 5, 2026
概括
德克斯特旋转基因氨酸 (D-Kyn) 在预防移植排斥方面表现有前途. 较高的D-Kyn水平与稳定的移植功能相关,通过抑制炎症性M1巨细胞和T细胞激活.
科学领域:
- 免疫学 免疫学 免疫学
- 移植科学 移植科学
- 代谢学 代谢学 代谢学
背景情况:
- 急性排斥 (AR) 显著影响移植存活率.
- 左右旋转氨基酸 (D-AAs) 的免疫抑制作用尚不清楚.
- 确定AR的新型治疗点至关重要.
研究的目的:
- 调查D-AAs在移植排斥中的作用.
- 为了确定与移植存活相关的特定D-AA代谢物.
- 评估d-kynurenine (D-Kyn) 在预防AR的治疗潜力.
主要方法:
- 来自移植受体的血清样本使用离子运动质谱法 (IM-MS) 进行了分析,以量化D-AA水平.
- 分析了单细胞RNA测序 (scRNA-seq) 数据 (GSE109564) 的数据.
- 用皮肤和脏移植的小鼠模型来评估D-Kyn治疗的体内效应.
主要成果:
- 鉴定出血清D-Kyn水平升高,与稳定的移植功能相关.
- 与L-Kyn相比,D-Kyn通过PHGDH/TLR4/Caspase-1通路显示出更强的抑制M1巨细胞的炎症活性.
- 在小鼠模型中的体内D-Kyn治疗抑制了巨细胞介导的炎症和CD8+T细胞激活,减少了促炎性细胞因子.
结论:
- D-Kyn 是一个关键的代谢物,与成功的移植结果有关.
- 通过调节巨细胞和T细胞反应,D-Kyn具有强大的免疫抑制特性.
- 在移植中,D-Kyn代表了一种有前途的治疗候选物,用于预防急性排斥.
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