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Homeobox genes and the vertebrate head
1Department of Zoology, University of Oxford, UK.
Development (Cambridge, England)
|January 1, 1988
Summary
Homeobox genes, found in Drosophila and vertebrates, are crucial for embryonic development. Their spatial expression patterns suggest roles in brain and neural crest positional specification during vertebrate embryogenesis.
Area of Science:
- Developmental Biology
- Genetics
- Molecular Biology
Background:
- The homeobox DNA sequence is present in Drosophila genes controlling embryonic development.
- Similar homeobox sequences are found in vertebrate genes, suggesting potential regulatory roles in embryogenesis.
Purpose of the Study:
- To discuss spatial patterns of vertebrate homeobox gene expression.
- To relate these patterns to analyses of head development.
Main Methods:
- Review of existing data on vertebrate homeobox gene expression.
- Integration with descriptive and experimental analyses of head development.
Main Results:
- Vertebrate homeobox gene expression patterns are consistent with roles in anteroposterior positional specification in the developing brain.
- These patterns may also indicate roles in neural crest development.
- The data do not strongly support direct roles in controlling cranial segmentation patterns.
Conclusions:
- Homeobox genes likely play a significant role in specifying anterior-posterior positions within the developing vertebrate brain and neural crest.
- Further research is needed to determine if vertebrate segments are developmental specification units and the precise role of homeobox genes in cranial segmentation.