在克罗恩病模型中,MSCs通过持续的抗炎性巨细胞编程,通过细胞分裂 (efferocytosis) 来调节长期疗效
Maneesh Dave1,2, Atul Dev3, Rodrigo A Somoza4
1Division of Gastroenterology and Hepatology, Department of Internal Medicine, UC Davis Medical Center, University of California Davis School of Medicine, Sacramento, CA, USA. mdave@ucdavis.edu.
在克罗恩氏病模型中,人类骨髓衍生中酶干细胞 (hMSCs) 促进愈合. 尽管寿命短暂,但hMSCs通过通过细胞分裂重新编程巨细胞提供长期益处.
科学领域:
- 免疫学 免疫学 免疫学
- 胃肠病学 胃肠病学
- 再生医学是一种再生医学.
背景情况:
- 介质细胞干细胞 (MSCs) 显示了克罗恩病的治疗潜力.
- 在慢性炎症模型中MSC作用的确切机制尚不清楚.
研究的目的:
- 在慢性小肠炎症 (SAMP) 的小鼠模型中研究人类骨髓衍生的MSCs (hMSCs) 的治疗作用和机制.
主要方法:
- 使用SAMP-1/YitFc (SAMP) 鼠标模型治疗慢性小肠炎症.
- 管理的hMSCs和评估的治疗效应粘膜愈合,免疫反应和组织学.
- 使用Sc-RNAseq分析巨细胞表型和与hMSCs的相互作用.
主要成果:
- 剂量依赖的hMSCs通过前列腺素E2 (PGE2) 抑制了T淋巴细胞的增殖,并诱导了抗炎性巨细胞表型.
- 早期使用hMSCs促进了粘膜的愈合和免疫反应.
- 在28日观察到完整的愈合 (粘膜,组织学,免疫学,放射学),即使在没有活hMSC的情况下.
- 鉴定出缩性hMSCs的巨细胞增生是长期疗效的关键机制.
结论:
- 在慢性小肠炎症中,hMSCs有助于愈合和组织再生.
- 短暂的hMSCs通过长期的抗炎性编程对巨细胞通过细胞分裂产生持续的治疗效果.
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