The distinct metabolic profile of hematopoietic stem cells reflects their location in a hypoxic niche.

The distinct metabolic profile of hematopoietic stem cells reflects their location in a hypoxic niche.
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DOI:
10.1016/j.stem.2010.07.011
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发表时间:
2010-09-03
期刊:
影响因子:
23.9
通讯作者:
Sadek HA
Sadek HA
中科院分区:
医学1区
文献类型:
--
作者:
Simsek T;Kocabas F;Zheng J;Deberardinis RJ;Mahmoud AI;Olson EN;Schneider JW;Zhang CC;Sadek HA

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骨髓移植是许多造血系统疾病的主要治疗方法。骨髓移植的效率取决于长期造血干细胞(LT-HSC)的功能,而LT-HSC的功能受其低氧生态位的显著影响。在这种低氧微环境中生存需要显著的代谢适应。在这里,我们发现LT-HSC利用糖酵解而不是线粒体氧化磷酸化来满足其能量需求。我们使用流式细胞术鉴定了一种独特的低线粒体活性/糖酵解依赖性亚群,该亚群容纳了大多数造血祖细胞和LT-HSC。最后,我们证明Meis 1和Hif-1α在LT-HSC中显著富集,并且Meis 1通过转录激活Hif-1α来调节HSC代谢。这些发现揭示了调节HSC代谢的重要转录网络。
Bone marrow transplantation is the primary therapy for numerous hematopoietic disorders. The efficiency of bone marrow transplantation depends on the function of long-term hematopoietic stem cells (LT-HSCs), which is markedly influenced by their hypoxic niche. Survival in this low-oxygen microenvironment requires significant metabolic adaptation. Here, we show that LT-HSCs utilize glycolysis instead of mitochondrial oxidative phosphorylation to meet their energy demands. We used flow cytometry to identify a unique low mitochondrial activity/glycolysis-dependent subpopulation that houses the majority of hematopoietic progenitors and LT-HSCs. Finally, we demonstrate that Meis1 and Hif-1α are markedly enriched in LT-HSCs and that Meis1 regulates HSC metabolism through transcriptional activation of Hif-1α. These findings reveal an important transcriptional network that regulates HSC metabolism.
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发表时间: 2004-10-01
影响因子: 4.8
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