Nkx2.5 triggers vascular remodeling in chicken but not in emu wing mesoderm
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View abstract on PubMed
Summary
This summary is machine-generated.Nkx2.5 transcription factor impacts limb development differently in chickens and emus. In chickens, Nkx2.5 overexpression caused vascular changes, but not in emu wing development, highlighting context-dependent effects.
Area Of Science
- Developmental Biology
- Molecular Biology
- Evolutionary Biology
Background
- Nkx2.5 is a crucial transcription factor for heart development.
- Its role in limb development is less understood, with varied observations in different species.
- Nkx2.5 is unexpectedly found in developing emu wings, which are vestigial.
Purpose Of The Study
- To investigate the cellular effects of Nkx2.5 in limb development.
- To compare Nkx2.5 function in chicken and emu limb fields.
- To understand the context-dependent roles of Nkx2.5 in vertebrate limb formation.
Main Methods
- Localized electroporation of Nkx2.5 in chicken embryo wing fields.
- Analysis of single-cell RNA sequencing data from emu embryos.
- Gene expression analysis, including Scl, Hand2, and Prrx1.
Main Results
- Overexpression of Nkx2.5 in chicken wings induced ectopic Scl expression and vascular changes.
- Nkx2.5-expressing cells in emu wings were primarily muscle-related, lacking hemangiogenic markers.
- Scl expression was not detected in Nkx2.5-positive emu wing cells.
Conclusions
- Nkx2.5 can experimentally induce vascular changes in chicken limbs but not during normal emu wing development.
- The effects of Nkx2.5 are context-dependent, influenced by the cellular environment and lineage.
- This study refines understanding of Nkx2.5 function in limb mesoderm and emu wing development.
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