移植旧器官有助于年轻接受者的衰老
Jasper Iske1, Maximilian J Roesel2, Friederike Martin3
1Division of Transplant Surgery, Department of Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA; Klinik für Herz-, Thorax-, und Gefäßchirurgie, Deutsches Herzzentrum der Charité, Berlin, Germany; Berlin Institutes of Health at Charité - Universitätsmedizin Berlin, Berlin, Germany.
概括
移植较老的捐赠器官可以通过诱导细胞衰老来加速年轻受体的衰老. 在移植之前,老年捐赠者的老年治疗改善了接受者的结果,这表明了有希望的治疗策略.
科学领域:
- 老年学是一门学科.
- 移植免疫学 移植免疫学
- 细胞衰老 细胞衰老
背景情况:
- 器官捐赠者和接受者的年龄差异在移植中很常见.
- 衰老的捐赠器官含有衰老细胞,可以传递衰老.
- 老年捐献器官对受体衰老的影响尚未完全理解.
研究的目的:
- 调查老年捐赠者的器官是否会在年轻的接受者中诱导衰老和与年龄有关的病理.
- 探索潜在的机制,包括老化相关的分泌表型 (SASP) 因素的作用.
- 评估老龄化药物在缓解这些影响方面的治疗潜力.
主要方法:
- 在年龄不匹配的C57BL/6小鼠 (老捐赠者,年轻/中年接受者) 之间进行同质心脏移植.
- 评估各种组织中的衰老细胞负担和系统性SASP因子,包括线粒体DNA (mt-DNA).
- 评估身体表现和认知功能 (空间学习和记忆).
- 在移植前给老捐赠动物服用老化药物.
主要成果:
- 移植老捐赠器官导致受体组织中衰老细胞频率增加.
- 接受者表现出身体性能降低和认知能力受损.
- 接受者的SASP因子,特别是mt-DNA的系统水平升高.
- mt-DNA注射模仿了因年龄不匹配移植引起的衰老加速.
- 在老捐赠者中,移植前的老化治疗减少了mt-DNA的释放,并改善了接受者的身体能力.
结论:
- 植入老年捐赠器官会诱导衰老,并加速年轻移植受体的衰老.
- 从衰老细胞中释放的线粒体DNA (mt-DNA) 在这个过程中起着机械作用.
- 针对老年捐赠器官的老化疗法是一种可行的策略,可以改善移植结果并减轻接受者的衰老.
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