Role of Delta-like 1 in Mouse Somite Development
Author Information
Author(s): Teppner Ingeborg, Becker Sonja, Angelis Martin Hrabé, Gossler Achim, Beckers Johannes
Primary Institution: GSF – National Research Center for Environment and Health, GmbH, Institute of Experimental Genetics
Hypothesis
Restricted Dll1 expression in caudal somite compartments is required for the maintenance of rostro-caudal somite polarity and the morphogenesis of the axial skeleton.
Conclusion
Overexpression of Dll1 in transgenic mice leads to skeletal dysmorphologies, particularly affecting intervertebral joints and vertebrae morphology.
Supporting Evidence
- Transgenic mice exhibited missing or reduced intervertebral discs and malformed vertebrae.
- Dll1 overexpression did not alter the initial formation of somites.
- Histological analyses showed normal epithelial somites despite Dll1 overexpression.
Takeaway
Scientists studied mice with a gene that was turned on too much and found that it caused problems in their backbones, showing that the gene needs to be just right for proper development.
Methodology
Transgenic mice were created to overexpress Dll1, and various analyses including gene expression and skeletal imaging were performed.
Limitations
The study did not explore the effects of even higher doses of Dll1 expression, which might lead to different phenotypes.
Participant Demographics
Transgenic mice from two independent lines were used.
Digital Object Identifier (DOI)
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