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XB-ART-45018
Dev Dyn November 1, 2011; 240 (11): 2495-504.

Axial protocadherin (AXPC) regulates cell fate during notochordal morphogenesis.



Abstract
The separation and specification of mesoderm into the notochord and somites involves members of the non-clustered δ-protocadherins. Axial (AXPC) and paraxial (PAPC) protocadherins are expressed in the early dorsal mesoderm and later become refined to the developing notochordal and somitic mesoderm, respectively. The role of PAPC in this process has been studied extensively, but the role of AXPC is poorly understood. Partial knockdown of AXPC causes a specific bent-axis phenotype, while more severe knockdown results in the loss of notochord formation. The inability of these embryos to develop a notochord is not due to a cell-sorting event via changes in cell adhesion during gastrulation, but rather this defect is manifested through the loss of axial mesoderm specification, but not general mesoderm induction. The results presented here show that AXPC functions in notochord morphogenesis by directing cell-fate decisions rather than cell-cell adhesion.

PubMed ID: 21960065
PMC ID: PMC3197877
Article link: Dev Dyn
Grant support: [+]
Genes referenced: cdh3 chrd.1 fn1 myod1 pcdh1 pcdh8.2 sox17a sox2 tbxt
Morpholinos: pcdh1 MO1 pcdh1 MO2


Article Images: [+] show captions
References [+] :
Aamar, Protocadherin-18a has a role in cell adhesion, behavior and migration in zebrafish development. 2008, Pubmed


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