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
影响因子:
11.8
通讯作者:
Zelzer, Elazar
中科院分区:
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
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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影响因子:
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通讯作者:
Moses, HL
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Rossert, Jerome
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通讯作者:
Hamburger, V