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Published on: November 29, 2012
Generation of mice with a conditional null allele for Wntless
April C Carpenter1, Sujata Rao, James M Wells
1Visual Systems Group, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio 45229, USA.
Genesis (New York, N.Y. : 2000)
|July 9, 2010
Summary
Wntless (Wls) is crucial for embryonic development. A new Wls conditional null allele reveals its essential roles in midbrain, hindbrain, and pancreas development, offering insights into Wnt signaling in development and disease.
Area of Science:
- Developmental Biology
- Molecular Biology
- Genetics
Background:
- The Wnt-signaling pathway regulates critical developmental processes.
- Wntless (Wls) protein is essential for Wnt protein secretion.
- Complete Wls deletion causes early embryonic lethality.
Purpose of the Study:
- To investigate the function of Wls in later stages of development.
- To generate and utilize a conditional Wls null allele.
- To explore Wnt signaling in specific tissues and developmental contexts.
Main Methods:
- Generation of a conditional Wls null allele.
- Utilizing Wnt1-cre for midbrain and hindbrain deletion.
- Conditional deletion in pancreatic precursor cells.
- Phenotypic analysis of Wls-deficient embryos and tissues.
Main Results:
- Homozygous germline deletion confirmed embryonic lethality and axis formation defects.
- Wnt1-cre mediated deletion phenocopied Wnt1 null abnormalities in the brain.
- Conditional deletion in pancreatic precursors led to pancreatic hypoplasia.
Conclusions:
- The Wls conditional null allele is a valuable tool for studying Wnt function.
- Wls plays critical roles in midbrain, hindbrain, and pancreas development.
- This allele will aid in uncovering novel Wnt functions in development and disease.
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