Activation of the Flt3 signal transduction cascade rescues and enhances type I interferon-producing and dendritic cell development.

Activation of the Flt3 signal transduction cascade rescues and enhances type I interferon-producing and dendritic cell development.
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DOI:
10.1084/jem.20051645
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发表时间:
2006-01-23
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Manz MG
Manz MG
中科院分区:
其他
文献类型:
--
作者:
Onai N;Obata-Onai A;Tussiwand R;Lanzavecchia A;Manz MG

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Flt 3配体(Flt 3L)是I型干扰素产生细胞(IPC)和树突状细胞(DC)发育中的非冗余细胞因子,并且IPC和DC分化潜能仅限于Flt 3+造血祖细胞。在这里,我们发现人Flt 3在Flt 3 −(Flt 3 −Lin−IL-7 R α−Thy1.1−c-Kit+)和Flt 3+(Flt 3 +Lin−IL-7 R α−Thy1.1−c-Kit+)造血祖细胞中的过表达分别挽救和增强了它们的IPC和DC分化潜能。在确定的造血细胞群体中,如Flt 3-巨核细胞/红细胞限制性祖细胞(MEP),增强的Flt 3信号转导诱导IPC,DC和粒细胞/巨噬细胞(GM)发育相关基因的转录,包括STAT 3,PU.1和G-/M-/GM-CSFR,并激活这些谱系的分化能力。此外,Flt 3 − MEP中Flt 3下游转录因子STAT 3或PU. 1的异位表达引起Flt 3受体表达并指导分化为IPC、DC和骨髓单核细胞,而加塔-1表达和连续的巨核细胞/红细胞发育受到抑制。基于这些数据,我们提出了一种需求调节的、精氨酸驱动的DC和IPC再生模型,其中高Flt 3L水平在Flt 3+造血祖细胞中启动了自我维持的、Flt 3-STAT 3-和Flt 3-PU.1-介导的IPC和DC分化程序。
Flt3 ligand (Flt3L) is a nonredundant cytokine in type I interferon–producing cell (IPC) and dendritic cell (DC) development, and IPC and DC differentiation potential is confined to Flt3+ hematopoietic progenitor cells. Here, we show that overexpression of human Flt3 in Flt3− (Flt3−Lin−IL-7Rα−Thy1.1−c-Kit+) and Flt3+ (Flt3+Lin−IL-7Rα−Thy1.1−c-Kit+) hematopoietic progenitors rescues and enhances their IPC and DC differentiation potential, respectively. In defined hematopoietic cell populations, such as Flt3− megakaryocyte/erythrocyte-restricted progenitors (MEPs), enforced Flt3 signaling induces transcription of IPC, DC, and granulocyte/macrophage (GM) development–affiliated genes, including STAT3, PU.1, and G-/M-/GM-CSFR, and activates differentiation capacities to these lineages. Moreover, ectopic expression of Flt3 downstream transcription factors STAT3 or PU.1 in Flt3− MEPs evokes Flt3 receptor expression and instructs differentiation into IPCs, DCs, and myelomonocytic cells, whereas GATA-1 expression and consecutive megakaryocyte/erythrocyte development is suppressed. Based on these data, we propose a demand-regulated, cytokine-driven DC and IPC regeneration model, in which high Flt3L levels initiate a self-sustaining, Flt3-STAT3– and Flt3-PU.1–mediated IPC and DC differentiation program in Flt3+ hematopoietic progenitor cells.
DOI: 10.1084/jem.20030107
发表时间: 2003-07-21
期刊: The Journal of experimental medicine
影响因子: --
作者:
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发表时间: 2002-04-01
期刊: The Journal of experimental medicine
影响因子: --
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发表时间: 2002-05-13
期刊: ONCOGENE
影响因子: 8
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发表时间: 2004-12-06
影响因子: 15.3
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Chicha, L;Jarrossay, D;Manz, MG
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发表时间: 1995-08-14
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影响因子: 3.5
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