介质细胞和造血干细胞形成一个独特的骨髓位
Simón Méndez-Ferrer1, Tatyana V Michurina, Francesca Ferraro
1Department of Medicine, Mount Sinai School of Medicine, New York, New York 10029, USA. simon.mendez-ferrer@cnic.es
Nature
|August 13, 2010
概括
通过内斯表达识别的介质干细胞 (MSCs) 对血造干细胞 (HSC) 利基至关重要. 这些 nestin ((+) MSC 支持骨髓微环境中的 HSC 维护和定位.
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
- 骨髓微环境研究 骨髓微环境研究
背景情况:
- 骨髓中的血造干细胞 (HSC) 利基的精确细胞组成仍然不完全理解.
- 之前的研究已经涉及骨质母细胞,内皮细胞和周围血管细胞在HSC的利基功能.
研究的目的:
- 识别和表征特定的细胞类型,这些细胞类型对于维持血造干细胞所必不可少.
- 阐明骨髓中介质干细胞 (MSC) 和血造干细胞 (HSC) 之间的功能关系.
主要方法:
- 用巢素表达作为标记物识别介质干细胞 (MSCs).
- 巢的扩散 ((+) MSCs作为不粘附的"半球体"用于自我更新和连续移植测定.
- 评估Nestin (((+) MSCs和HSCs之间的空间关联,以及对HSC维护和骨质细胞分化标志物的基因表达分析.
- 在体内操纵nestin (((+) 细胞种群,评估HSC含量,调动和定位.
主要成果:
- 体体体体 (MSC) 被确定为HSC利基的关键组成部分,具有所有骨髓殖民地形成单元纤维细胞活性.
- 巢素 ((+) MSCs与HSCs和上腺神经纤维有空间联系,表达关键的HSC维护基因.
- 在强制动员HSC或β3上腺受体激活过程中,HSC维护基因和骨质细胞分化基因被下调.
- 帕激素的使用增加了nestin () 细胞并促进了它们的骨质细胞分化,而nestin () 细胞的枯竭迅速降低了骨髓的HSC含量.
- 纯化HSCs优先定位在nestin (((+) MSCs附近,以及nestin (((+) 细胞枯竭损害的造血原体定位在骨髓中.
结论:
- 通过nestin表达识别的介质干细胞 (MSCs) 是血造干细胞 (HSC) 利基的重要组成部分.
- 这项研究揭示了nestin(+) MSCs和HSCs之间的新型伙伴关系,在骨髓利基中形成异型干细胞对.
- 这些发现为HSCs独特的微环境调节和造血原生细胞行为提供了新的见解.
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