Nrf2 regulates haematopoietic stem cell function.

Nrf2 regulates haematopoietic stem cell function.
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DOI:
10.1038/ncb2699
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发表时间:
2013-03
影响因子:
21.3
通讯作者:
--
中科院分区:
生物学1区
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--
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协调造血干细胞(HSC)的静止和自我更新之间的平衡是维持造血功能终身的关键。造血功能同样重要的是调节骨髓小生境内的HSC定位,因为HSC功能的维持受到内在分子机制和与周围微环境的外在信号相互作用的复杂网络的严格控制。在这项研究中,我们证明,核因子红细胞2相关因子2(Nfe2l2,或Nrf2),以及建立作为一个全球性的调节氧化应激反应,在几个方面的HSC稳态中发挥着调节作用。Nrf 2缺乏会导致细胞内在过度增殖,导致造血干细胞和祖细胞区室扩张,而这是以牺牲HSC静止和自我更新为代价的。我们进一步表明,Nrf2调节HSC在其小生境中的迁移和保留。此外,我们确定了一个以前未被识别的Nrf2和CXCR4之间的联系,有助于,至少部分地,维持HSC功能。
Coordinating the balance between haematopoietic stem cell (HSC) quiescence and self-renewal is crucial for maintaining haematopoiesis lifelong. Equally important for haematopoietic function is modulating HSC localization within the bone marrow niches, as maintenance of HSC function is tightly controlled by a complex network of intrinsic molecular mechanisms and extrinsic signalling interactions with their surrounding microenvironment. In this study we demonstrate that nuclear factor erythroid 2-related factor 2 (Nfe2l2, or Nrf2), well established as a global regulator of the oxidative stress response, plays a regulatory role in several aspects of HSC homeostasis. Nrf2 deficiency results in an expansion of the haematopoietic stem and progenitor cell compartment due to cell-intrinsic hyperproliferation, which was accomplished at the expense of HSC quiescence and self-renewal. We further show that Nrf2 modulates both migration and retention of HSCs in their niche. Moreover, we identify a previously unrecognized link between Nrf2 and CXCR4, contributing, at least partially, to the maintenance of HSC function.
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