Irx1 and Irx2 expression in early lung development.
We describe a comparative lung expression analysis of the murine Irx1 and Irx2 genes. At embryonic day 8.5 (E8.5), the Irx1 and Irx2 expression starts in the foregut region, where the laryngo-tracheal groove will form. The expression is prominent in the lung epithelium during glandular development. It declines at the end of the canalicular phase. We further compare the Irx1 and Irx2 expression domains to Gli1, 2, 3 and Mash1. Their homologues in Drosophila melanogaster are known as regulative partners of the iroquois complex. The Irx and Gli genes are coexpressed in the developing lungs at the same time. Their transcripts are not localised in the same cells but adjacent to each other in either mesenchymal or epithelial structures. It is thought that the lung development is regulated by the mesenchymal/epithelial interactions.
Becker
M B
MB
Department of Molecular Cell Biology, Max Planck Institute of Biophysical Chemistry, Am Fassberg, 37077, Göttingen, Germany.
Zülch
A
A
Bosse
A
A
Gruss
P
P
D000818:Animals; D051792:Basic Helix-Loop-Helix Proteins; D004268:DNA-Binding Proteins / Q000235:genetics; D004848:Epithelium / Q000196:embryology / Q000378:metabolism; D015870:Gene Expression; D020869:Gene Expression Profiling; D005801:Genes, Homeobox; D018398:Homeodomain Proteins / Q000235:genetics* / Q000378:metabolism; D017403:In Situ Hybridization; D051741:Kruppel-Like Transcription Factors; D008168:Lung / Q000196:embryology* / Q000378:metabolism; D008648:Mesoderm / Q000378:metabolism; D051379:Mice; D009419:Nerve Tissue Proteins; D015513:Oncogene Proteins / Q000235:genetics; D012097:Repressor Proteins; D015534:Trans-Activators; D014157:Transcription Factors / Q000235:genetics* / Q000378:metabolism; D029867:Xenopus Proteins; D000071676:Zinc Finger Protein GLI1; D000075746:Zinc Finger Protein Gli2; D000074290:Zinc Finger Protein Gli3
D051792:Basic Helix-Loop-Helix Proteins; D004268:DNA-Binding Proteins; D018398:Homeodomain Proteins; D051741:Kruppel-Like Transcription Factors; D009419:Nerve Tissue Proteins; D015513:Oncogene Proteins; D012097:Repressor Proteins; D015534:Trans-Activators; D014157:Transcription Factors; D029867:Xenopus Proteins; D000071676:Zinc Finger Protein GLI1; D000075746:Zinc Finger Protein Gli2; D000074290:Zinc Finger Protein Gli3; C499317:Ascl1 protein, mouse; C108003:GLI3 protein, Xenopus; C065683:GLI3 protein, human; C000618551:Gli2 protein, mouse; C465571:Gli3 protein, mouse; C501591:IRX1 protein, human; C501595:IRX2 protein, human; C501592:Irx1 protein, mouse; C501596:Irx2 protein, mouse