三级淋巴体结构通过IFN-γ-JAK-STAT依赖的非典型记忆B细胞分化驱动异位移植排斥
Lijie Ma1,2,3, Shiming Gong1,2,3, Jianchen Fang4
1Department of Liver Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
Frontiers in immunology
|December 29, 2025
概括
肝脏全移植中的三级淋巴体结构 (TLS) 与排斥和纤维化相关. 这些结构通过非典型的记忆B细胞和IFN-γ形成,导致肝细胞损伤,但可以在治疗上准.
科学领域:
- 免疫学 免疫学 免疫学
- 移植生物学 移植生物学
- 病理学 病理学 病理学
背景情况:
- 三级淋巴体结构 (TLS) 是异位淋巴体聚合物,涉及各种疾病.
- 它们在异位移植排斥中的精确作用,特别是肝脏异位移植,需要进一步阐明.
研究的目的:
- 为了研究肝脏异种移植排斥中TLS的病理作用和形成.
- 使用深度学习病理学开发一个预测模型,用于全植入物排斥.
主要方法:
- 从儿科活体供体肝移植 (LDLT) 的肝活检队列 (n=590) 的回顾性分析.
- 开发一个深度学习病理学 (DLP) 模型.
- 基因表达概况,免疫景观分析 (ESTIMATE,CIBERSORT,XCELL,MCP),单细胞RNA测序 (scRNA-seq) 和多重免疫组织化学 (mIHC).
- 在体内小鼠模型用于治疗目标验证.
主要成果:
- 肝移植中的TLS增加与排斥,纤维化和肝功能降低相关.
- TLS形成涉及非典型的记忆B细胞通过JAK-STAT通路分化,由IFN-γ从耗尽的CD8+T细胞刺激.
- TLS通过巨细胞促进肝细胞的抗体依赖细胞介导的细胞.
- 在小鼠中,JAK1/3抑制或Lta淘汰减弱了TLS形成和全移植排斥.
结论:
- 一个DLP模型可以预测全移植器的排斥.
- 一个依赖IFN-γ-JAK-STAT的途径驱动TLS形成和肝细胞损伤在异种移植排斥.
- 针对这种途径提供了一种潜在的治疗策略,用于全移植器的排斥.
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