Interactions between MSCs and immune cells: implications for bone healing.

Interactions between MSCs and immune cells: implications for bone healing.
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MSC与免疫细胞之间的相互作用:对骨愈合的影响。

DOI:
10.1155/2015/752510
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发表时间:
2015
影响因子:
4.1
通讯作者:
Cui Q
Cui Q
中科院分区:
医学3区
文献类型:
--
作者:
Kovach TK;Dighe AS;Lobo PI;Cui Q

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据估计,在美国每年发生的790万例骨折中,有5%至20%导致愈合延迟或受损,需要治疗干预。骨折损伤后,最初的炎症反应在骨愈合中起着至关重要的作用;然而,长期炎症对骨折修复具有抑制作用。免疫细胞及其细胞因子对骨折愈合的精确的空间和时间影响仍然不清楚。据报道,一些细胞因子是促成骨的,而另一些细胞因子抑制骨愈合。利用间充质基质细胞(MSC)的细胞为基础的治疗是一个有吸引力的选择,以增强骨折修复过程。骨祖细胞MSC不仅分化成骨,而且还通过多种机制对免疫细胞发挥调节作用。在本文中,我们回顾了目前的文献在体外和体内研究的免疫系统在骨折修复中的作用,使用骨髓间充质干细胞在骨折愈合的增强,骨髓间充质干细胞和免疫细胞之间的相互作用。深入了解这种模式可以提供有价值的线索,在确定细胞和非细胞的目标,可以潜在地被调制,以提高自然骨愈合和骨修复增强的外源性添加间充质干细胞。
It is estimated that, of the 7.9 million fractures sustained in the United States each year, 5% to 20% result in delayed or impaired healing requiring therapeutic intervention. Following fracture injury, there is an initial inflammatory response that plays a crucial role in bone healing; however, prolonged inflammation is inhibitory for fracture repair. The precise spatial and temporal impact of immune cells and their cytokines on fracture healing remains obscure. Some cytokines are reported to be proosteogenic while others inhibit bone healing. Cell-based therapy utilizing mesenchymal stromal cells (MSCs) is an attractive option for augmenting the fracture repair process. Osteoprogenitor MSCs not only differentiate into bone, but they also exert modulatory effects on immune cells via a variety of mechanisms. In this paper, we review the current literature on both in vitro and in vivo studies on the role of the immune system in fracture repair, the use of MSCs in the enhancement of fracture healing, and interactions between MSCs and immune cells. Insight into this paradigm can provide valuable clues in identifying cellular and noncellular targets that can potentially be modulated to enhance both natural bone healing and bone repair augmented by the exogenous addition of MSCs.
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