内皮细胞MHC分子是必要的,并且足以拒绝3D打印的人类皮肤移植在先进的人类免疫系统小鼠
bioRxiv : the preprint server for biology
|December 17, 2025
概括
使用未经修改的内皮细胞 (ECs) 进行3D打印的皮肤移植在小鼠中引发了免疫排斥. 带有MHC删除ECs (KO-ECs) 的移植物避免了免疫攻击,证明了改善全基性皮肤移植的策略.
科学领域:
- 组织工程是组织工程.
- 免疫学 免疫学 免疫学
- 在3D生物打印中使用3D生物打印
背景情况:
- 血管化的皮肤组织工程对于再生医学至关重要.
- 免疫排斥仍然是成功的全源性皮肤移植的重要障碍.
- 了解内皮细胞 (EC) 在移植免疫中的作用至关重要.
研究的目的:
- 为了评估3D打印的血管化皮肤移植的免疫性.
- 调查内皮细胞 (EC) MHC分子表达对移植体排斥的影响.
- 评估一种策略,以减轻皮肤全移植中的免疫反应.
主要方法:
- 使用人体细胞 (纤维细胞,皮细胞,角质细胞,ECs) 进行血管化皮肤的3D打印.
- 使用未经修改的ECs (WT-ECs) 和MHC删除的ECs (KO-ECs).
- 在接受人类造血干细胞 (HSC) 和外周血液单核细胞 (PBMC) 的MISTRG6免疫缺陷小鼠身上植入皮肤.
主要成果:
- PBMC促进了循环T细胞的增加和WT-EC移植中的移植透,导致排斥.
- WT-EC移植显示了巨细胞,树突细胞,CD4+和CD8+T细胞的透.
- 在KO-EC移植细胞中,尽管在其他移植细胞上表达MHC,但免疫透率很小,没有排斥.
结论:
- 内皮细胞 (EC) MHC分子在启动针对血管化皮肤全移植的免疫反应中发挥着关键作用.
- 在3D打印的皮肤移植中,从EC中删除MHC分子可以防止免疫排斥.
- 这突出了开发免疫规避性皮肤替代品的有希望的方法.
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