A revised road map for the commitment of human cord blood CD34-negative hematopoietic stem cells.

A revised road map for the commitment of human cord blood CD34-negative hematopoietic stem cells.
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DOI:
10.1038/s41467-018-04441-z
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发表时间:
2018-06-06
影响因子:
16.6
通讯作者:
Sonoda Y
Sonoda Y
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Sumide K;Matsuoka Y;Kawamura H;Nakatsuka R;Fujioka T;Asano H;Takihara Y;Sonoda Y

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我们先前在人类脐带血中鉴定出CD 34阴性(CD 34 −)严重联合免疫缺陷(SCID)-再生细胞为原始造血干细胞(HSC)。在这项研究中,我们开发了一个前瞻性的超高分辨率纯化方法,通过应用两个阳性标记,CD 133和GPI-80。使用这种方法,我们成功地从脐带血中纯化了具有自我更新能力的单个长期再增殖的CD 34 − HSC,这些HSC位于人类HSC层级的顶端,这一点通过单细胞启动的系列移植分析得到了证明。单个CD 34+和CD 34 − HSC的基因表达谱和全球基因表达分析证明了CD 34 − HSC的独特分子特征。我们发现,纯化的CD 34 − HSC在体外和体内显示出强大的巨核细胞/红细胞分化潜力。因此,巨核细胞/红细胞祖细胞可以通过旁路途径从CD 34 − HSC直接产生。基于这些数据,我们提出了一个修订的路线图,用于在脐带血中定向培养人CD 34 − HSC。单个CD 34阴性造血干细胞(HSCs)可以完全重建小鼠的淋巴-骨髓造血。在这里,使用单细胞移植和基因表达分析,作者表明,CD 34阴性HSC位于人脐带血造血的顶点,它们可以产生红系巨核细胞祖细胞。
We previously identified CD34-negative (CD34−) severe combined immunodeficiency (SCID)-repopulating cells as primitive hematopoietic stem cells (HSCs) in human cord blood. In this study, we develop a prospective ultra-high-resolution purification method by applying two positive markers, CD133 and GPI-80. Using this method, we succeed in purifying single long-term repopulating CD34− HSCs with self-renewing capability residing at the apex of the human HSC hierarchy from cord blood, as evidenced by a single-cell-initiated serial transplantation analysis. The gene expression profiles of individual CD34+ and CD34− HSCs and a global gene expression analysis demonstrate the unique molecular signature of CD34− HSCs. We find that the purified CD34− HSCs show a potent megakaryocyte/erythrocyte differentiation potential in vitro and in vivo. Megakaryocyte/erythrocyte progenitors may thus be generated directly via a bypass route from the CD34− HSCs. Based on these data, we propose a revised road map for the commitment of human CD34− HSCs in cord blood. Single CD34 negative haematopoietic stem cells (HSCs) can fully reconstitute lympho-myeloid hematopoiesis in mice. Here, using single cell transplantation and gene expression analyses, the authors show that CD34 negative HSCs lie at the apex of haematopoiesis in human cord blood and that they can give rise to erythroid megakaryocytic progenitors.
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