慢性淋巴细胞白血病 (CLL) 衍生的细胞外囊泡教育内皮细胞成为IL-6产生,CLL支持细胞
Orit Uziel1,2,3, Lian Lipshtein1,3, Zinab Sarsor1,2
1The Felsenstein Medical Research Center, Rabin Medical Center Petah-Tikva, Petah Tikva 49100, Israel.
Biomedicines
|July 27, 2024
概括
慢性淋巴细胞白血病 (CLL) 细胞释放细胞外囊泡 (EVs),将内皮细胞转化为IL-6的生产者. 这一过程激活STAT3,减少CLL细胞亡,促进疾病的进展.
科学领域:
- 血液学 血液学 血液学
- 细胞生物学 细胞生物学
- 癌症研究 癌症研究
背景情况:
- 慢性淋巴细胞白血病 (CLL) 是一种B细胞恶性瘤,瘤微环境起着至关重要的作用.
- 细胞外囊泡 (EVs) 调解细胞间的通信,并与癌症的进展有关.
- 内皮细胞形成血管内膜,与循环中的白血病细胞相互作用.
研究的目的:
- 调查CLL衍生的EV是否诱导内皮细胞以支持CLL细胞存活.
- 阐明CLL EVs改变内皮细胞功能的分子机制.
- 确定IL-6和β-catenin在这种相互作用中的作用.
主要方法:
- 从CLL患者的外周血液中分离出EV并进行了表征.
- 内皮细胞 (HUVEC,HAOEC) 用CLL衍生的EVs进行治疗.
- 通过ELISA测量IL-6水平.
- 评估了STAT3酸化和亡率.
- 进行了酸蛋白组学和网络分析.
- 进行了β-catenin转染和染色体免疫沉试验.
主要成果:
- 细胞内皮细胞以剂量和时间依赖的方式将CLL-EV内部化.
- CLL-EVs显著增加了内皮细胞的IL-6产生 (50%的增加).
- 条件介质中的IL-6通过STAT3激活将CLL细胞亡减少40%.
- 基蛋白学发现了高调节的基蛋白,突出的是基β-catenin.
- β-catenin转染使IL-6的产生增加了30%,并增强了转录因子与IL-6促进体的结合.
- 患有CLL的患者表现出较高的外周血液IL-6水平,而不是健康个体.
结论:
- 通过EVs,CLL细胞与内皮细胞进行通信.
- 这种CLL-EVs重编程内皮细胞以产生IL-6.
- 这种IL-6通过STAT3抗亡途径促进CLL细胞存活.
- β-catenin是CLL EV诱导的IL-6产生中的关键媒介.
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