对BM-MSC的转录组分析确定EGR1作为转录因子,以充分利用其治疗潜力
Ludovica Santi1, Stefano Beretta1, Margherita Berti1
1San Raffaele Telethon Institute for Gene Therapy (SR-TIGET), IRCCS San Raffaele Scientific Institute, Milan, Italy.
Biochimica et biophysica acta. Molecular cell research
|August 21, 2024
概括
骨髓介质细胞 (BM-MSCs) 在扩张过程中失去免疫功能. 在BM-MSC中过度表达EGR1恢复了这些特性,增强了它们在造血干细胞原生细胞移植中临床应用的潜力.
科学领域:
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
- 再生医学是一种再生医学.
背景情况:
- 骨髓介酶体 stromal 细胞 (BM-MSCs) 对于造血干细胞原生细胞 (HSPC) 稳定性和免疫调节在骨髓内至关重要.
- 临床前研究表明,BM-MSCs增强HSPC移植并减少移植模型中的移植失败.
- 广泛的BM-MSCs体外扩展可以改变它们的基本生物和功能性质,限制临床效用.
研究的目的:
- 在体外扩展后研究人类BM-MSCs的转录组变化.
- 确定恢复扩展BM-MSC的功能性质的策略.
- 评估过度表达转录因子EGR1对BM-MSC功能的影响.
主要方法:
- 原发性和扩展性人类BM-MSCs (CD45-, CD105+, CD73+, CD90+) 的转录组分析.
- 在扩展的BM-MSC中识别下调的免疫和炎症基因.
- 在BM-MSC中转录因子EGR1的过度表达.
- 实验室功能测试以评估EGR1-过度表达的BM-MSCs的特性,包括对炎症刺激的反应,免疫细胞控制和造血支持.
主要成果:
- 细胞培养导致BM-MSCs免疫和炎症基因表达的下调.
- 在BM-MSC中EGR1的过度表达恢复了它们对炎症刺激的反应,并增强了免疫细胞的控制.
- 过度表达EGR1的BM-MSC在共同培养试验中表现出潜在的造血支持活性.
结论:
- 活体扩张损害了BM-MSCs的免疫和炎症功能.
- EGR1作为一个关键的转录因子,维持BM-MSC特性.
- 基于EGR1的重编程提供了一种有前途的策略,以提高BM-MSCs在移植治疗中的临床疗效.
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