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Haematologica:细胞外囊泡能挽救白血病细胞的自发性或药物诱导的凋亡

2017-06-15 xiaoxiao MedSci原创

慢性淋巴细胞白血病B细胞与骨髓微环境的交叉作用在慢性淋巴细胞白血病的病理生理学中发挥了主要作用。细胞外囊泡包括外泌体和微粒,在细胞通信中起着重要的作用。然而,它们对慢性淋巴细胞白血病/骨髓微环境交叉作用的影响知之甚少。 在本研究中,将离心纯化法从骨髓间质细胞中得到的细胞外囊泡添加到慢性淋巴细胞白血病B细胞中。在他们整合成慢性淋巴细胞白血病B细胞之后,研究人员观察了一个白血病细胞自发凋亡的

慢性淋巴细胞白血病B细胞与骨髓微环境的交叉作用在慢性淋巴细胞白血病的病理生理学中发挥了主要作用。细胞外囊泡包括外泌体和微粒,在细胞通信中起着重要的作用。然而,它们对慢性淋巴细胞白血病/骨髓微环境交叉作用的影响知之甚少。

在本研究中,将离心纯化法从骨髓间质细胞中得到的细胞外囊泡添加到慢性淋巴细胞白血病B细胞中。在他们整合成慢性淋巴细胞白血病B细胞之后,研究人员观察了一个白血病细胞自发凋亡的减少量及对几种药物(包括氟达拉滨,依鲁替尼,艾代拉利司和Venetoclax;24h后)的耐药性的增加。

研究人员发现:慢性淋巴细胞白血病B细胞中,自发性(P = 0.0078)和诱导性基质细胞衍生因子1α(stromal cell-derived factor 1,SDF-1α)的迁移能力明显增强(P = 0.0020)。基因芯片研究显示有或没有细胞外囊泡的白血病细胞培养之间有805个表达基因存在显著差异。其中,参与B细胞受体信号通路基因如CCL3/4, EGR1/2/3, and MYC均有增加。有趣的是,这个重要的改变与其他微环境刺激如B细胞受体刺激,慢性淋巴细胞白血病/乳状细胞联合培养或淋巴结微环境刺激相重叠。最后,研究人员发现白血病患者间质干细胞的细胞外囊泡也能挽救白血病细胞的自发性或药物诱导的凋亡。但与健康的间质干细胞的细胞外囊泡相比,它们具有更高的迁移能力和更强的基因修饰作用。

总之,研究人员认为,细胞外囊泡对慢性淋巴细胞白血病B细胞/骨髓微环境间的沟通起着至关重要的作用。

原始出处:

Crompot E, Van Damme M,et al.Extracellular vesicles of bone marrow stromal cells rescue chronic lymphocytic leukemia B-cells from apoptosis, enhance their migration and induce gene expression modifications.Haematologica. 2017 Jun 8. pii: haematol.2016.163337. doi: 10.3324/haematol.2016.163337. [Epub ahead of print]

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    2017-07-11 一叶知秋
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    2017-06-17 fengyi812
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    2017-06-17 sodoo
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    2017-06-15 dhzzm

    学习了分享了

    0

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