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Mouse embryonic fibroblasts derived from Odin deficient mice display a hyperproliiferative phenotype
Troels Zakarias Kristiansen1, Mogens Møller Nielsen, Blagoy Blagoev
1McKusick-Nathans Institute of Genetic Medicine and Department of Biological Chemistry, Johns Hopkins University, Baltimore, MD 21205, USA.
Summary
Odin, a negative regulator of growth factor signaling, was studied in mice. While Odin-deficient mice show no obvious issues, their cells proliferate excessively, confirming Odin
Area of Science:
- Cell biology
- Molecular biology
- Biochemistry
Background:
- Odin is a cytosolic protein with a phosphotyrosine binding (PTB) domain.
- It negatively regulates growth factor signaling pathways.
- Odin was identified for its tyrosine phosphorylation upon EGF stimulation.
Purpose of the Study:
- To investigate Odin's role in growth factor receptor signaling in vivo.
- To elucidate Odin's biological function using gene-targeted mice.
- To confirm Odin's function as a negative regulator.
Main Methods:
- Gene targeting in mice to create Odin-deficient models.
- Histological examination of major organs (kidney, lung, liver).
- Analysis of mouse embryonic fibroblasts (MEFs) for proliferation phenotype.
Main Results:
- Odin-deficient mice exhibit no overt phenotype or major organ abnormalities.
- Odin-deficient MEFs display a hyperproliferative phenotype compared to wild-type MEFs.
- These findings support Odin's role as a negative regulator of growth factor signaling.
Conclusions:
- Odin is not essential for major developmental pathways in mice.
- Odin plays a significant role in negatively regulating growth factor receptor signaling.
- Further research can explore Odin's specific mechanisms in signaling pathways.