Molecular basis of species-specific variation in beak morphology
Ontology highlight
ABSTRACT:
ORGANISM(S): Gallus gallus
SUBMITTER: Kara Powder
PROVIDER: E-GEOD-11099 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
Publications
Comparative gene expression analysis of avian embryonic facial structures reveals new candidates for human craniofacial disorders.
Brugmann S A SA Powder K E KE Young N M NM Goodnough L H LH Hahn S M SM James A W AW Helms J A JA Lovett M M
Human molecular genetics 20091216 5
Mammals and birds have common embryological facial structures, and appear to employ the same molecular genetic developmental toolkit. We utilized natural variation found in bird beaks to investigate what genes drive vertebrate facial morphogenesis. We employed cross-species microarrays to describe the molecular genetic signatures, developmental signaling pathways and the spectrum of transcription factor (TF) gene expression changes that differ between cranial neural crest cells in the developing ...[more]
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Project description:Avian beaks show extreme species-specific variability in morphology, though they develop from the same primordial structures. In both humans and birds, cranial neural crest cells are the primary source of mesenchyme for the frontonasal prominence; previous work has shown that these cells contain molecular information that regulate species-specific facial variation. To determine the molecular basis of avian craniofacial patterning, we have gene expression profiled micro-dissected cranial neural crest cells from the frontonasal prominence of three bird species (chickens, quails, and ducks) during embryonic development. These changes in gene expression were measured on a custom built, cross-species, long oligonucleotide microarray that interrogates the vast majority of transcription factor (TF) genes plus a wide variety of signaling pathways. Samples were isolated at two developmental stages, before (Hamburger Hamilton stage [HH] 20) and after (HH25) morphological distinctions between the species are evident. Keywords: cross-species comparison Frontonasal mesenchymal cells were micro-dissected two developmental stages, before (Hamburger Hamilton stage [HH] 20) and after (HH25) morphological distinctions between the species are evident. For each sample, mesenchyme from 40 embryos was pooled. For each stage-matched comparison between duck and chicken, experiments include technical replicates as well as dye-switches for a total of 14 microarrays.
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Project description:Avian beaks show extreme species-specific variability in morphology, though they develop from the same primordial structures. In both humans and birds, cranial neural crest cells are the primary source of mesenchyme for the frontonasal prominence; previous work has shown that these cells contain molecular information that regulate species-specific facial variation. To determine the molecular basis of avian craniofacial patterning, we have gene expression profiled micro-dissected cranial neural crest cells from the frontonasal prominence of three bird species (chickens, quails, and ducks) during embryonic development. These changes in gene expression were measured on a custom built, cross-species, long oligonucleotide microarray that interrogates the vast majority of transcription factor (TF) genes plus a wide variety of signaling pathways. Samples were isolated at two developmental stages, before (Hamilton Hamburger stage [HH] 20) and after (HH25) morphological distinctions between the species are evident. Keywords: cross-species comparison Frontonasal mesenchymal cells were micro-dissected two developmental stages, before (Hamilton Hamburger stage [HH] 20) and after (HH25) morphological distinctions between the species are evident. For each sample, mesenchyme from 40 embryos was pooled. For each stage-matched comparison between chicken and quail, experiments include technical replicates as well as dye-switches for a total of 12 microarrays.
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