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细胞状态特定的代谢依赖性在血液形成和白血病发生过程中
Ying-Hua Wang1, William J Israelsen2, Dongjun Lee1
1Center for Regenerative Medicine and Cancer Center, Massachusetts General Hospital, Boston, MA 02114, USA; Harvard Stem Cell Institute, Cambridge, MA 02114, USA; Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA.
Cell
|September 13, 2014
概括
调节葡萄糖代谢会影响血液细胞的发育. 向酸盐激酶M2 (PKM2) 或乳酸脱酶A (LDHA) 抑制白血病,但不影响造血干细胞 (HSC),表明治疗潜力.
科学领域:
- 细胞代谢的细胞代谢.
- 血液形成 血液形成 血液形成
- 癌症生物学 癌症生物学
背景情况:
- 葡萄糖代谢,特别是氧化和非氧化途径之间的平衡,对于细胞功能和疾病至关重要.
- 血液形成,即血细胞形成的过程,依赖于精确的代谢调节.
- 改变葡萄糖代谢是许多癌症的标志,包括白血病.
研究的目的:
- 为了研究关键的糖解酶,酸盐激酶M2 (PKM2) 和乳酸脱酶A (LDHA) 在正常血液形成和白血病中的特定作用.
- 为了确定调节葡萄糖代谢是否可以选择性地向白血病细胞,同时保持正常的造血干细胞 (HSC) 和祖先.
主要方法:
- 利用基因删除策略,在小鼠模型中专门去除PKM2和LDHA.
- 评估了酶缺陷在正常血液形成过程中对HSC和原始细胞功能的影响.
- 评估了PKM2和LDHA删除对白血病发病和进展的影响.
主要成果:
- 虽然PKM2缺乏导致原生细胞功能受损,生物合成中间体减少,但没有影响HSCs.
- 在血液形成过程中,LDHA删除显著抑制了HSC和原始细胞功能.
- 白血病的发病因缺少PKM2或LDHA而被抑制,无论受影响的细胞类型 (HSC或原始细胞).
- 在正常血液形成中观察到的细胞状态特定的代谢反应不适用于白血病.
结论:
- 向PKM2或LDHA为白血病提供了一个潜在的治疗策略.
- 微调糖解可能允许选择性消除白血病细胞,同时保持基本的HSC功能.
- 在白血病中的代谢干预可以克服在正常血液形成中观察到的细胞状态特异性抵抗机制.
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