单细胞转录组学揭示了纤维细胞和激活的免疫细胞之间的相互作用:一种探索性生物信息学研究缓慢过渡性便秘中的促炎机制
Fengxu Chi1, Weidong Sun1, Cong Zhang1
1Department of Colorectal Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China.
International journal of surgery (London, England)
|April 23, 2025
概括
研究人员在慢过渡便秘 (STC) 患者中确定了特定的XCL2+ CD8+ T细胞. 这些细胞与其他免疫和肌肉细胞相互作用,可能会破坏肠道免疫恒常性和功能.
科学领域:
- 胃肠病学 胃肠病学
- 免疫学 免疫学 免疫学
- 单细胞基因组学 单细胞基因组学
背景情况:
- 缓慢过渡便秘 (STC) 涉及由神经内分泌,代谢,微生物和离子运输因素影响的结肠功能障碍.
- 免疫信号传递,细胞激活和细胞因子分泌与STC的氧化应激,屏障破坏和功能障碍有关.
- 免疫微环境 (IME) 和STC中的特定细胞类型仍然是鲜为人知的,特别是慢性炎症期间免疫细胞与树皮细胞的相互作用.
研究的目的:
- 使用单细胞RNA测序,阐明STC患者的免疫微环境 (IME).
- 识别STC特异性免疫细胞类型及其在疾病发病过程中的作用.
- 研究STC中免疫细胞和肌体细胞之间的细胞间通信机制.
主要方法:
- 单细胞RNA测序 (scRNA-seq) 在6名STC患者和6名健康对照者的结肠组织上进行.
- 进行了差异基因表达和途径分析,以确定特定群体的分子特征.
- 分析了细胞分化轨迹和细胞间通信网络,以了解细胞与细胞之间的相互作用.
主要成果:
- 确定了特定于STC的XCL2+ CD8+ T细胞,它们与其他免疫细胞和肠道 stromal 细胞具有显著的细胞间通信.
- B细胞和髓质细胞通过CD137共同刺激来增强XCL2+ CD8+ T细胞功能.
- 激活的XCL2+ CD8+ T细胞通过IFNG和TNFSF14信号传递促进纤维细胞的促炎性细胞因子分泌,而纤维细胞通过NECTIN信号传递相互调节T细胞.
结论:
- 特定于STC的XCL2+ CD8+ T细胞在调节肠道免疫微环境方面发挥着至关重要的作用.
- 这些T细胞可能会导致肠道平衡的破坏,并在缓慢过渡便秘中发挥作用.
- 了解这些免疫相互作用为STC提供了潜在的治疗点.
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