在白血病细胞进展中,来自中介细胞流体细胞衍生的细胞外囊中的miR-29b的潜在作用
Heejei Yoon1,2, Silvia Park1,2,3, Yong-Rim Kwon1,2
1Cancer Research Institute, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
PloS one
|September 10, 2025
概括
来自骨髓质疏松症候群 (MDS) 的细胞外囊 (EVs) 介质性 stromal 细胞 (MSCs) 将miR-29b传递给白血病细胞,促进药物耐药性和疾病进展. 这突出了EVs作为MDS病变发生的关键媒介.
科学领域:
- 血液学 血液学 血液学
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- 白血病细胞和骨髓中介质 stromal 细胞 (MSCs) 之间的交叉声在骨髓显样性综合征 (MDS) 发病过程中至关重要.
- 细胞外囊泡 (EVs) 调解了这一至关重要的细胞间通信.
- 来自MDS-MSCs的EV特异性微RNA (miRNA) 尚未得到充分理解.
研究的目的:
- 研究EV衍生的miRNAs在MDS病变发生中的作用.
- 探索特定miRNAs,特别是miR-29b对白血病细胞行为和药物耐药性的影响.
主要方法:
- 电动汽车与MDS-MSC和控制MSC的隔离和表征.
- 用EV治疗白血病细胞 (SKM-1) 并随后分析增殖和耐药性.
- 用miR-29b对白血病细胞进行转导,以评估其个体效应.
- 对基因表达 (DNMTs,TETs) 和受miR-29b影响的细胞通路的分析.
主要成果:
- 来自MDS-MSC和HS-5细胞的EV促进了白血病细胞的增殖和对5-阿扎丁 (AZA) 的抵抗.
- 与对照组相比,MDS-MSC衍生的EV显示出较高的miR-29b-3p和较低的let-7a-5p和miR-23-3p.
- 使用miR-29b的白血病细胞的转导赋予了对AZA和venetoclax的耐药性,反映了EV的影响.
- miR-29b下调的表观遗传修饰剂 (DNMT1,DNMT3L,TET1,TET2),影响DNA甲基化,染色体不稳定性和干扰素通路.
结论:
- 通过EVs持续输送miR-29b可能会推动MDS的白血病细胞进化和耐药性.
- miR-29b通过改变表观遗传景观和细胞功能,在MDS病原发生过程中发挥着重要作用.
- 在MDS中,EV介导的miR-29b转移的临床相关性需要进一步研究.
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