大小依赖于MSC分泌物的免疫调节:可溶性因子向先天性通路,大于100kDa的成分调节T细胞增殖
Christophe Wong1,2, Isaure Rous3, Shony Lemieux3
1Chemistry and Biology, Modeling and Immunology for Therapy (CBMIT), Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR) 8601, Université Paris Cité, Paris, France. christophe.wong@everzom.com.
Stem cell research & therapy
|October 11, 2025
概括
介酶体 stromal 细胞的分泌物通过可溶性因子和细胞外囊泡调节免疫力. 5kDa以下的可溶性因子抑制免疫路径,而较大的成分不同影响T细胞增殖,指导无细胞治疗设计.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 生物技术是生物技术.
背景情况:
- 介酶体 stromal 细胞 (MSCs) 使用复杂的秘密体,包括可溶性因子和细胞外囊泡 (EVs),用于免疫调节.
- 秘密组分对免疫调节效应的具体贡献还不清楚.
- 确定负责MSC分泌物活性的生物活性分子对于治疗应用至关重要.
研究的目的:
- 划分可溶性因子与MSC分泌体内的细胞外囊泡 (EVs) 的独特免疫调节作用.
- 确定负责抑制免疫细胞激活和增殖的特定分子成分.
- 通过了解秘密组合的组成,为无细胞MSC治疗的设计提供信息.
主要方法:
- 人类外周血液单核细胞 (PBMC) 和THP-1双记者细胞用MSC分泌物分离体进行了治疗.
- 触流过 (TFF) 和超离心法用于隔离可溶性因子和EVs.
- 测量NF-κB和IRF通路激活和T细胞增殖,以评估免疫调节.
主要成果:
- 溶解因子 (<5kDa) 来自MSC分泌体的剂量依赖抑制NF-κB和IRF通路激活,部分通过前列腺素E2.
- 缩的分泌体和细胞外囊泡 (EVs) 显示这些通路的抑制减少或不存在.
- 通过缩的秘密体 (无论TFF切断大小) 抑制了T细胞增殖,但通过澄清的秘密体并没有显著抑制.
结论:
- MSC 秘密体表现出复杂的免疫调节,可溶性因子和较大的成分具有不同的作用.
- 可溶性因子 (<5kDa) 主要准免疫细胞信号通路 (NF-κB,IRF).
- 组件>100 kDa和EVs可能通过不同的机制影响T细胞增殖,影响无细胞治疗的发展.
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