新型小干扰RNA含溶液保护心脏移植中捐赠器官
Xiufen Zheng1, Dameng Lian, Arthur Wong
1Department of Surgery, University of Western Ontario, London, Ontario, Canada.
Circulation
|September 10, 2009
概括
纳入器官保存溶液中的小干扰RNA (siRNA) 有效地减轻缺血/反损伤. 这种新的方法可以保护心脏功能,并在移植环境中显著延长移植的存活时间.
科学领域:
- 移植免疫学 移植免疫学
- 分子生物学分子生物学
- 生物医学工程 生物医学工程
背景情况:
- 缺血/再输液 (I/R) 损伤显著影响器官移植质量和功能.
- 目前的保存方法不能完全解决I/R损伤,导致移植结果差.
- RNA干扰提供了一种潜在的策略,通过抑制关键的受伤相关基因来设计移植.
研究的目的:
- 作为器官保存的一部分,研究用小干扰RNA (siRNA) 进行ex vivo移植治疗的疗效.
- 确定siRNA是否可以抑制与炎症,亡和补充激活相关的基因,从而导致I/R损伤.
- 评估siRNA治疗对心脏移植功能和存活率的影响.
主要方法:
- 来自BALB/c小鼠的心脏移植被保存在威斯康星大学 (UW) 溶液或UW溶液中,其中有针对TNF-α,C3和Fas基因的siRNA.
- 在移植到Syngeneic接受者之前,移植物被保存在4°C的生物体内48小时.
- 评估了基因和蛋白质表达,移植收缩,组织学,免疫细胞透和长期功能.
主要成果:
- 在UW溶液中保存后,I/R损伤增加了TNF-α,C3和Fas基因表达.
- siRNA治疗显著降低了移植中向基因的信使RNA和蛋白质水平.
- 与对照移植不同的是,siRNA保存的移植体表现出强烈的收缩,改善了组织学,减少了免疫细胞透,并维持了100天以上的功能.
结论:
- 将siRNA纳入器官储存溶液是减少I/R损伤的可行方法.
- 这一策略有效地保护心脏移植功能,并延长移植后的移植生存期.
- 通过siRNA介导的基因沉默是提高器官保存的有希望的方法.
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