在活着的人类接受基因编辑猪的接受者中进行免疫分析
Guilherme T Ribas1, André F Cunha2, Jonathan P Avila3
1Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.
Nature medicine
|January 8, 2026
概括
基因编辑猪异种移植显示T细胞早期排斥,通过加强免疫抑制逆转. 天生的免疫激活仍然存在,这突显了成功器官移植需要结合天生的和适应性免疫疗法的需要.
科学领域:
- 免疫学 免疫学 免疫学
- 移植科学 移植科学
- 遗传学 是一个遗传学.
背景情况:
- 腎臟移植受到器官短缺的限制.
- 基因编辑的猪脏为异种移植提供了一个潜在的解决方案.
- 成功的异种移植需要了解免疫反应.
研究的目的:
- 在接受基因编辑猪的人体中进行高维免疫分析.
- 描述免疫反应,包括排斥机制和生物标志物.
- 确定改善异种移植结果的策略.
主要方法:
- 转录组学,蛋白组学,代谢组学和多重成像被用于免疫分析.
- 监测循环的T细胞,先天性免疫细胞和来自捐赠者的无细胞DNA.
- 异种移植排斥与异种移植排斥的比较转录基因分析.
主要成果:
- 早期的T细胞中介排斥发生了尽管T细胞枯竭,由残留的T细胞和次治疗性免疫抑制驱动.
- 强化免疫抑制逆转了T细胞介导的排斥,但适应性免疫仍然受到抑制.
- 观察到持续的先天免疫激活 (单细胞,巨细胞,IL-1β,GM-CSF).
- 异种移植拒绝与异种移植拒绝有相似之处,但具有独特的先天免疫特征.
- 上升的猪捐赠者衍生的无细胞DNA与排斥发作相关,表明其作为生物标记物的有用性.
结论:
- 异种移植引发复杂的免疫反应,包括适应性免疫和先天性免疫.
- 目前的免疫抑制疗法可能需要调整,以平衡T细胞枯竭和先天免疫控制.
- 来自猪捐赠者的无细胞DNA是监测异种移植排斥的有希望的非侵入性生物标志物.
- 未来的战略必须针对先天性和适应性免疫路径,以成功进行异种植.
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