The chemokine Sdf-I and its receptor Cxcr4 are required for formation of muscle in zebrafish

被引:58
作者
Chong, Shang-Wei
Nguyet, Le-Minh
Jiang, Yun-Jin
Korzh, Vladimir
机构
[1] Inst Mol & Cell Biol, Lab Fish Dev Biol, Proteos 138673, Singapore
[2] Inst Mol & Cell Biol, Lab Dev Signaling & Patterning, Proteos 138673, Singapore
[3] Natl Univ Singapore, Dept Sci Biol, Singapore 117543, Singapore
来源
BMC DEVELOPMENTAL BIOLOGY | 2007年 / 7卷
关键词
D O I
10.1186/1471-213X-7-54
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Background: During development cell migration takes place prior to differentiation of many cell types. The chemokine receptor Cxcr4 and its ligand Sdf1 are implicated in migration of several cell lineages, including appendicular muscles. Results: We dissected the role of sdf1-cxcr4 during skeletal myogenesis. We demonstrated that the receptor cxcr4a is expressed in the medial-anterior part of somites, suggesting that chemokine signaling plays a role in this region of the somite. Previous reports emphasized co-operation of Sdf1a and Cxcr4b. We found that during early myogenesis Sdf1a co-operates with the second Cxcr4 of zebrafish - Cxcr4a resulting in the commitment of myoblast to form fast muscle. Disrupting this chemokine signal caused a reduction in myoD and myf5 expression and fast fiber formation. In addition, we showed that a dimerization partner of MyoD and Myf5, E12, positively regulates transcription of cxcr4a and sdf1a in contrast to that of Sonic hedgehog, which inhibited these genes through induction of expression of id2. Conclusion: We revealed a regulatory feedback mechanism between cxcr4a-sdf1a and genes encoding myogenic regulatory factors, which is involved in differentiation of fast myofibers. This demonstrated a role of chemokine signaling during development of skeletal muscles.
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页数:14
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