Like mammals, the amphibian Xenopus uses combinatorial joining of the immunoglobulin V, D and J elements and multiple rearrangements to generate its B cell repertoire. Xenopus larvae hatch 2 days after fertilization and individuals are under pressure to develop an immune repertoire when the number o
BMP signalling in early Xenopus development
β Scribed by Leslie Dale; C. Michael Jones
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 156 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0265-9247
No coin nor oath required. For personal study only.
β¦ Synopsis
Bone morphogenetic proteins (BMPs) are typically members of the transforming growth factor β€ (TGF-β€) family with diverse roles in embryonic development. At least five genes with homology to BMPs are expressed during Xenopus development, along with their receptors and intracellular signalling pathways. The evidence suggests that BMPs have roles to play in both mesoderm induction and dorsoventral patterning. Studies in Xenopus have also identified a number of inhibitory binding proteins for the classical BMPs, encoded by genes such as chordin and noggin. These proteins appear to be responsible for establishing a morphogen gradient of BMP4 activity, which specifies different dorsoventral fates in early gastrulae. An emerging theme is that inhibition of BMP signalling is an important mechanism regulating cell fate decisions in early development.
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