Bone ridge patterning during musculoskeletal assembly is mediated through SCX regulation of Bmp4 at the tendon-skeleton junction.

Bone ridge patterning during musculoskeletal assembly is mediated through SCX regulation of Bmp4 at the tendon-skeleton junction.
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DOI:
10.1016/j.devcel.2009.10.010
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发表时间:
2009-12
期刊:
影响因子:
11.8
通讯作者:
Zelzer, Elazar
Zelzer, Elazar
中科院分区:
生物学1区
文献类型:
--
作者:
Blitz, Einat;Viukov, Sergey;Sharir, Amnon;Shwartz, Yulia;Galloway, Jenna L.;Pryce, Brian A.;Johnson, Randy L.;Tabin, Clifford J.;Schweitzer, Ronen;Zelzer, Elazar

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在肌肉骨骼系统的组装过程中,骨嵴提供了稳定的锚定点和应力消散,用于通过肌腱将肌肉附着到骨骼。在这项研究中,我们调查的三角肌粗隆的发展作为一个模型的骨嵴形成。我们发现,三角肌粗隆的发展通过endochondrialossification在两个阶段的过程:启动是由肌腱的信号,而随后的生长阶段是肌肉依赖性的。然后,我们表明,转录因子scleraxis(SCX)调节Bmp4在肌腱细胞在其插入位点。抑制三角肌粗隆的形成和其他几个骨嵴在胚胎中,BMP4的表达被阻止,特别是在Scx表达细胞牵连BMP 4作为一个关键的调解人肌腱的影响骨嵴的形成。本研究建立了一个机制的基础,肌腱骨骼调节相互作用,在肌肉骨骼组装和骨的二级图案。
During the assembly of the musculoskeletal system, bone ridges provide a stable anchoring point and stress dissipation for the attachment of muscles via tendons to the skeleton. In this study, we investigate the development of the deltoid tuberosity as a model for bone ridge formation. We show that the deltoid tuberosity develops through endochondral ossification in a two-phase process: Initiation is regulated by a signal from the tendons, whereas the subsequent growth phase is muscle-dependent. We then show that the transcription factor scleraxis (SCX) regulates Bmp4 in tendon cells at their insertion site. The inhibition of deltoid tuberosity formation and several other bone ridges in embryos in which Bmp4 expression was blocked specifically in Scx-expressing cells implicates BMP4 as a key mediator of tendon effects on bone ridge formation. This study establishes a mechanistic basis for tendon-skeleton regulatory interactions during musculoskeletal assembly and bone secondary patterning.
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