The bone marrow at the crossroads of blood and immunity.

The bone marrow at the crossroads of blood and immunity.
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DOI:
10.1038/nri3132
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发表时间:
2011-12-23
期刊:
Nature reviews. Immunology
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其他
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祖细胞是所有血细胞产生的基础,它们与适应性免疫系统中更成熟的成分共享骨髓。骨髓引导内的专门小生境,有时限制造血干细胞和祖细胞(HSPC)和谱系限制性免疫祖细胞的发育。特定的生态位组成部分被组织成不同的领域,以创造一个多样化的景观,其中专门的细胞分化或人口扩张计划进行。反映组织和生物体状态的局部线索影响细胞相互作用,以改变一系列细胞类型的产生。在这里,我们回顾了组织中的骨髓调控元件,并讨论这些元素如何提供一个动态的手段,为主机调节干细胞和适应性免疫细胞的生理挑战的反应。
Progenitor cells that are the basis for all blood cell production share the bone marrow with more mature elements of the adaptive immune system. Specialized niches within the bone marrow guide and, at times, constrain the development of haematopoietic stem and progenitor cells (HSPCs) and lineage-restricted immune progenitor cells. Specific niche components are organized into distinct domains to create a diversified landscape in which specialized cell differentiation or population expansion programmes proceed. Local cues that reflect the tissue and organismal state affect cellular interactions to alter the production of a range of cell types. Here, we review the organization of regulatory elements in the bone marrow and discuss how these elements provide a dynamic means for the host to modulate stem cell and adaptive immune cell responses to physiological challenges.
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