献体MHC特异性胸腺疫苗接种可以进行免疫相容性全移植
Yang Liu1,2,3,4,5, Hexi Feng1,2,3,4,5, Ke Li1,2,3,4,5
1Translational Medical Center for Stem Cell Therapy, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China.
Cell research
|January 3, 2025
概括
捐赠者MHC特异性胸腺疫苗接种 (DMTV) 诱导T细胞对自身和外来MHC的耐受性. 这一策略产生了双免疫不相容的小鼠,克服了移植供体器官的短缺.
科学领域:
- 免疫学 免疫学 免疫学
- 移植生物学 移植生物学
- 基因治疗 基因治疗
背景情况:
- 器官移植是器官衰竭的拯救生命的治疗方法,但由于主要组织相容性复合体 (MHC) 匹配的供体器官稀缺而受到限制.
- T细胞全识别是移植拒绝的主要原因,显著阻碍了移植成功率.
- 目前的器官捐赠系统面临着可用器官和接受者之间严重的不匹配,25%-80%的捐赠器官仍然没有匹配.
研究的目的:
- 引入一种新的"捐赠者MHC特异性胸腺疫苗接种" (DMTV) 策略,以诱导接受者对自身和异性捐赠者MHC的耐受性.
- 为克服需要器官移植的患者的MHC匹配捐赠器官的严重短缺.
主要方法:
- 通过腺相关病毒介导的输送被用来表达受体胸腺内的全源性MHC分子,与自身的MHC一起.
- 这一过程促进了T细胞的形成,导致了T细胞的枯竭,这些T细胞可以识别自我或供体MHC.
- 在C57BL/6-MHC和BALB/c-MHC双免疫相容小鼠模型以及人性化的BLT小鼠模型中验证了DMTV策略.
主要成果:
- 在工程发育的胸腺中实现了自身和异性MHC的稳定表达,促进了T细胞耐受性.
- 在DMTV接种疫苗后,在接受C57BL/6皮肤和胚胎干细胞的小鼠中观察到长期的移植耐受性.
- 在一个人性化的小鼠模型中,DMTV策略证明了它的有效性,使人类胚胎干细胞的免疫兼容性全移植成为可能.
结论:
- DMTV策略是一种有效的方法,可以在接受者身上建立一个与捐赠者兼容的免疫系统.
- 这种方法有效地解决了由MHC匹配的供体器官严重短缺所带来的临床挑战.
- DMTV对改善末期器官衰竭患者器官移植结果具有显著的前景.
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