动脉隙保持了血造细胞干细胞静止的状态
Yuya Kunisaki1, Ingmar Bruns, Christoph Scheiermann
11] Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, Bronx, New York 10461, USA [2] Department of Cell Biology, Albert Einstein College of Medicine, Bronx, New York 10461, USA.
Nature
|October 11, 2013
概括
静态造血干细胞 (HSC) 位于骨髓中由NG2(+) 周细胞包围的动脉小管附近. 破坏这些动脉隙会损害HSC的维护和功能.
科学领域:
- 血液学 血液学 血液学
- 干细胞生物学 干细胞生物学
- 发展生物学 发展生物学
背景情况:
- 造血干细胞 (HSC) 的维护依赖于细胞周期静止.
- 在骨髓中静止的HSCs的确切位置和位尚未完全理解.
- 已知流体细胞支持高细胞,但它们与静止高细胞的空间关系尚不清楚.
研究的目的:
- 为了确定特定的利基和相关的细胞类型,维持静止HSCs在老鼠骨髓.
- 研究血管结构和血管细胞在HSC局部化和静止中的作用.
主要方法:
- 鼠标骨髓的整体合焦点免疫光成像.
- 计算建模用于分析HSC,血管结构和树皮细胞之间的3D空间关联.
- 药理和基因操纵以评估HSC细胞周期状态和分布.
- 特定的细胞群的有条件耗尽.
主要成果:
- 静止的HSCs在骨内髓的小动脉周围特定局部化.
- 这些动脉的空隙完全由NG2 (((+) 细胞包裹,与与鼻状细胞相关的LEPR (((+) 细胞不同.
- 激活HSC细胞周期会导致从NG2 (((+) 周动脉转移到LEPR (((+) 周动脉状.
- NG2(+) 细胞的耗尽导致HSC循环,并减少长期重新填充的HSC.
结论:
- 动脉,特别是那些由NG2 ((+) 细胞包围的,对于维持造血干细胞静止是必不可少的.
- NG2(+) 周动脉位在调节HSC细胞周期状态和长期功能方面发挥着至关重要的作用.
- 了解这些特定的利基对于旨在维护HSC和再生医学的战略至关重要.
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