Blood:MYC诱导性AML的发生需要IL3和GM-CSF的持续共刺激

2020-07-03 QQY MedSci原创

IL3/GM-CSF刺激是MYC介导的人造血细胞由正常转为AML所必须的;早/晚幼粒细胞祖细胞通过MYC转导和IL3/GM-CSF暴露快速而有效地产生AML。

在健康人中,携带白血病突变的造血克隆随着年龄的增长而出现,但很少进展成急性髓系白血病(AML)。近期有证据表明微环境可能在人AML动态中发挥重要作用。

为了深入研究这一可能,Elizabeth Bulaeva等人检测了癌基因(c-MYC)和IL-3、GM-CSF及SCF暴露在异种移植免疫缺陷小鼠中对实验性人AML发生的联合和单独作用。

初步实验显示,将转染表达MYC的慢病毒的正常人CD34+血细胞移植到免疫缺陷小鼠,这些细胞会迅速发生可致死的扩增,表型和转录谱均与人AML细胞的类似,但只发生在转基因产生IL3、GM-CSF和SCF的小鼠中,或用共转染策略将细胞暴露在IL3或GM-CSF的小鼠中。

在IL3、GM-CSF或SCF缺乏的情况下,MYC+人细胞在移植小鼠中可持续数月产生正常的淋巴和髓系细胞,但二次转移到能产生人细胞因子的小鼠中时,MYC+细胞会迅速产生AML。

这些发现强调了这些细胞因子(IL3、GM-CSF和SCF)在激活正常分化的人造血细胞的恶性状态中所起的关键作用。

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    2021-03-14 wgx306
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    2020-10-19 kcb078
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    2020-07-05 guihongzh
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    2020-07-04 lijunhong7212

    微环境可能在人AML动态中发挥重要作用。

    0

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