Reprogramming committed murine blood cells to induced hematopoietic stem cells with defined factors.

Reprogramming committed murine blood cells to induced hematopoietic stem cells with defined factors.
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DOI:
10.1016/j.cell.2014.04.006
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发表时间:
2014-04-24
期刊:
影响因子:
64.5
通讯作者:
Rossi DJ
Rossi DJ
中科院分区:
生物学1区
文献类型:
--
作者:
Riddell J;Gazit R;Garrison BS;Guo G;Saadatpour A;Mandal PK;Ebina W;Volchkov P;Yuan GC;Orkin SH;Rossi DJ

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造血干细胞(HSCs)是维持血液形成的生命周期,是骨髓移植的功能单位。我们发现,瞬时表达的六个转录因子RUNX 1 T1,HLF,LMO 2,PRDM 5,PBX 1,和ZFP 37赋予多谱系移植的潜力,否则承诺淋巴和骨髓祖细胞,和骨髓效应细胞。包含MYC-N和MEIS 1以及使用多顺反子病毒增加了重编程功效。重编程的细胞,称为诱导HSC(iHSC),具有克隆多谱系分化潜能,重建干/祖细胞区室,并且可连续移植。单细胞分析显示,在最佳条件下衍生的iHSC表现出与内源性HSC高度相似的基因表达谱。这些发现表明,一组定义的因子的表达足以激活基因网络管理HSC功能的身份在定向血细胞。我们的研究结果提出了血细胞重编程可能是一种用于临床应用的可移植干细胞衍生策略的前景。
Hematopoietic stem cells (HSCs) sustain blood formation throughout life and are the functional units of bone marrow transplantation. We show that transient expression of six transcription factors RUNX1T1, HLF, LMO2, PRDM5, PBX1, and ZFP37 imparts multi-lineage transplantation potential onto otherwise committed lymphoid and myeloid progenitors, and myeloid effector cells. Inclusion of MYC-N and MEIS1, and use of polycistronic viruses increase reprogramming efficacy. The reprogrammed cells, designated induced-HSCs (iHSCs), possess clonal multi-lineage differentiation potential, reconstitute stem/progenitor compartments, and are serially transplantable. Single-cell analysis revealed that iHSCs derived under optimal conditions exhibit a gene expression profile that is highly similar to endogenous HSCs. These findings demonstrate that expression of a set of defined factors is sufficient to activate the gene networks governing HSC functional identity in committed blood cells. Our results raise the prospect that blood cell reprogramming may be a strategy for derivation of transplantable stem cells for clinical application.
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