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Generation of an Msx2-GFP conditional null allele
Vardina Bensoussan1, Yvan Lallemand, Julie Moreau
1Institut Pasteur, Unité de Génétique Moléculaire de la Morphogenèse, CNRS URA 2578, Paris, F-75015, France.
Genesis (New York, N.Y. : 2000)
|April 30, 2008
Summary
Researchers developed a new Msx2 conditional null allele using Cre/loxP technology to study gene function in mouse development. This tool allows for analysis beyond embryonic lethality, overcoming previous limitations in Msx gene research.
Area of Science:
- Developmental Biology
- Genetics
- Molecular Biology
Background:
- Msx1 and Msx2 are homeoprotein transcription factors crucial for mouse development.
- Redundancy between Msx1 and Msx2 necessitates double mutants for functional studies.
- Existing Msx1; Msx2 double mutants exhibit embryonic lethality around 14.5 days post coitum (dpc), limiting later-stage analysis.
Purpose of the Study:
- To overcome the limitations of embryonic lethality in Msx1; Msx2 double mutants.
- To enable the study of Msx gene function at later developmental stages.
- To generate a tool for conditional gene knockout of Msx2.
Main Methods:
- Generation of an Msx2 conditional null allele utilizing Cre/loxP technology.
- Flanking the Msx2 gene coding sequence with loxP sites.
- Incorporation of a green fluorescent protein (GFP) reporter gene under Msx2 regulatory control.
Main Results:
- The generated Msx2-GFP conditional allele functions normally.
- Cre-mediated recombination successfully creates an Msx2 null allele.
- Expression patterns of the GFP reporter precisely mirror those of the endogenous Msx2 gene.
Conclusions:
- The Msx2 conditional null allele is a viable tool for studying Msx gene function.
- This technology allows for the investigation of Msx gene roles beyond the previously observed embryonic lethality.
- The GFP reporter provides a reliable indicator of Msx2 gene expression and recombination events.
