| Regulation of hematopoiesis and the hematopoietic stem cell niche by Wnt signaling pathways |
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| 作者姓名： | Nemeth MJ Bodine DM |
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| 作者单位： | Hematopoiesis Section, Genetics and Molecular Biology Branch, National Human Genome Research Institute, Building 49, Room 3A18, 49 Convent Dr., MSC 4442, Bethesda, MD 20892-4442, USA |
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| 摘 要： | Hematopoietic stem cells （HSCs） are a rare population of cells that are responsible for life-long generation of blood cells of all lineages. In order to maintain their numbers, HSCs must establish a balance between the opposing cell fates of self-renewal （in which the ability to function as HSCs is retained） and initiation of hematopoietic differentiation. Multiple signaling pathways have been implicated in the regulation of HSC cell fate. One such set of pathways are those activated by the Wnt family of ligands. Wnt signaling pathways play a crucial role during embryogenesis and deregulation of these pathways has been implicated in the formation of solid tumors. Wnt signaling also plays a role in the regulation of stem cells from multiple tissues, such as embryonic, epidermal, and intestinal stem cells. However, the function of Wnt signaling in HSC biology is still controversial. In this review, we will discuss the basic characteristics of the adult HSC and its regulatory microenvironment, the ＂niche＂, focusing on the regulation of the HSC and its niche by the Wnt signaling pathways.
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| 关 键 词： | 造血干细胞 造血功能 蛋白质 造骨细胞 |
| 修稿时间： | 2007-09-04 |
Regulation of hematopoiesis and the hematopoietic stem cell niche by Wnt signaling pathways |
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| Nemeth MJ,Bodine DM.Regulation of hematopoiesis and the hematopoietic stem cell niche by Wnt signaling pathways[J].Cell Research,2007,17(9):746-758. |
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| Authors: | Nemeth Michael J Bodine David M |
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| Institution: | Hematopoiesis Section, Genetics and Molecular Biology Branch, National Human Genome Research Institute, Bethesda, MD 20892-4442, USA. mnemeth@nhgri.nih.gov |
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| Abstract: | Hematopoietic stem cells (HSCs) are a rare population of cells that are responsible for life-long generation of blood cells of all lineages. In order to maintain their numbers, HSCs must establish a balance between the opposing cell fates of self-renewal (in which the ability to function as HSCs is retained) and initiation of hematopoietic differentiation. Multiple signaling pathways have been implicated in the regulation of HSC cell fate. One such set of pathways are those activated by the Wnt family of ligands. Wnt signaling pathways play a crucial role during embryogenesis and deregulation of these pathways has been implicated in the formation of solid tumors. Wnt signaling also plays a role in the regulation of stem cells from multiple tissues, such as embryonic, epidermal, and intestinal stem cells. However, the function of Wnt signaling in HSC biology is still controversial. In this review, we will discuss the basic characteristics of the adult HSC and its regulatory microenvironment, the "niche", focusing on the regulation of the HSC and its niche by the Wnt signaling pathways. |
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| Keywords: | hematopoiesis hematopoietic stem cell Wnt proteins osteoblast |
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