Abstract:
:The three fibronectin leucine-rich repeat transmembrane (FLRT) proteins contain 10 leucine-rich repeats (LRR), a type III fibronectin (FN) domain, followed by the transmembrane region, and a short cytoplasmic tail. XFLRT3, a Nodal/TGFbeta target, regulates cell adhesion and modulates FGF signalling during Xenopus gastrulation. The present study describes the onset and pattern of FLRT1-3 expression in the early mouse embryo. FLRT3 expression is activated in the anterior visceral endoderm (AVE), and during gastrulation appears in anterior streak derivatives namely the node, notochord and the emerging definitive endoderm. To explore FLRT3 function we generated a null allele via gene targeting. Early Nodal activities required for anterior-posterior (A-P) patterning, primitive streak formation and left-right (L-R) axis determination were unperturbed. However, FLRT3 mutant embryos display defects in headfold fusion, definitive endoderm migration and a failure of the lateral edges of the ventral body wall to fuse, leading to cardia bifida. Surprisingly, the mutation has no effect on FGF signalling. Collectively these experiments demonstrate that FLRT3 plays a key role in controlling cell adhesion and tissue morphogenesis in the developing mouse embryo.
journal_name
Dev Bioljournal_title
Developmental biologyauthors
Maretto S,Müller PS,Aricescu AR,Cho KW,Bikoff EK,Robertson EJdoi
10.1016/j.ydbio.2008.03.021subject
Has Abstractpub_date
2008-06-01 00:00:00pages
184-93issue
1eissn
0012-1606issn
1095-564Xpii
S0012-1606(08)00228-5journal_volume
318pub_type
杂志文章abstract::Sensory placodes are unique columnar epithelia with neurogenic potential that develop in the vertebrate head ectoderm next to the neural tube. They contribute to the paired sensory organs and the cranial sensory ganglia generating a wide variety of cell types ranging from lens fibres to sensory receptor cells and neur...
journal_title:Developmental biology
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journal_title:Developmental biology
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journal_title:Developmental biology
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doi:10.1016/j.ydbio.2008.01.015
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journal_title:Developmental biology
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doi:10.1016/j.ydbio.2009.03.004
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journal_title:Developmental biology
pub_type: 杂志文章
doi:10.1016/j.ydbio.2008.04.037
更新日期:2008-08-01 00:00:00
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journal_title:Developmental biology
pub_type: 杂志文章
doi:10.1016/0012-1606(88)90247-3
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journal_title:Developmental biology
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journal_title:Developmental biology
pub_type: 杂志文章
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