Antagonistic interplay between mechanical forces and glucocorticoids in bone: a tale of kinases.

Antagonistic interplay between mechanical forces and glucocorticoids in bone: a tale of kinases.
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DOI:
10.1002/jcb.22660
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发表时间:
2010-09-01
影响因子:
4
通讯作者:
--
中科院分区:
生物学2区
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--
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机械力和糖皮质激素(GC)对骨的对比作用早已被认识。然而,这些刺激影响骨骼的细胞和分子机制仍然只有部分已知。骨细胞凋亡研究的最新证据表明,机械力和GC对骨细胞和成骨细胞的存活表现出匡威的影响,这是由于对粘着斑激酶FAK和Pyk 2的不同作用所致,粘着斑激酶FAK和Pyk 2是调节骨细胞和细胞外基质(ECM)之间整合素依赖性相互作用的分子。本前景回顾了这些发现,并提出了一种可能性,即对激酶信号传导的类似相反作用负责机械力和GC对骨骼的其他作用,特别是对骨形成和Wnt信号传导途径的作用。
The contrasting actions of mechanical forces and glucocorticoids (GC) on bone have been long recognized. However, the cellular and molecular mechanisms by which these stimuli impact the skeleton remain only partially known. Recent evidence gained from studies on bone cell apoptosis has revealed that mechanical forces and GC exhibit converse effects on osteocyte and osteoblast survival resulting from divergent actions on the focal adhesion kinases FAK and Pyk2, molecules that regulate integrin-dependent interactions between bone cells and the extracellular matrix (ECM). This prospect reviews these findings and poses the possibility that similar opposing effects on kinase signaling are responsible for other actions of mechanical forces and GC on the skeleton, in particular on bone formation and the Wnt signaling pathway.
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发表时间: 2005-07-29
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