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Generation of a Mig-6 conditional null allele.
Nili Jin1, Jennifer L Gilbert, Russell R Broaddus
1Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas 77030, USA.
Genesis (New York, N.Y. : 2000)
|November 8, 2007
Summary
Mitogen-inducible gene 6 (Mig-6) is crucial for normal development and acts as a tumor suppressor. Researchers created a Mig-6 conditional knockout mouse model to study its specific functions in different tissues.
Area of Science:
- Molecular Biology
- Genetics
- Developmental Biology
Background:
- Mitogen-inducible gene 6 (Mig-6) is a stress-induced gene.
- Mig-6 negatively regulates epidermal growth factor (EGF) signaling.
- Mig-6 functions as a tumor suppressor, and its absence causes embryo lethality and tissue abnormalities.
Purpose of the Study:
- To understand the physiological roles of Mig-6.
- To generate and validate a conditional null allele of Mig-6 for tissue-specific functional studies.
Main Methods:
- Generation of a conditional null allele, Mig-6(f/f), by flanking exons 2 and 4 with LoxP sites.
- Creation of recombined Mig-6(-/-) mice using the Zp3-Cre system.
- Confirmation of the conditional null allele via gene expression analysis in various tissues (liver, lung, uterus, skin).
Main Results:
- The Mig-6(f/f) allele was successfully validated.
- Recombined Mig-6(-/-) mice exhibited pathological changes including degenerative joint disease, skin hyperplasia, and uterine abnormalities (enlarged uteri with endometrial hyperplasia).
- These phenotypes resemble those of previously reported Mig-6 germline null alleles.
Conclusions:
- The generated Mig-6(f/f) mouse model is a valuable tool for investigating Mig-6 gene function.
- This model allows for tissue-specific functional studies of Mig-6.
- The findings highlight the critical role of Mig-6 in preventing specific pathological conditions.
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