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Whole Mount Imaging to Visualize and Quantify Peripheral Lens Structure, Cell Morphology, and Organization
Published on: January 19, 2024
Jagged 1 is necessary for normal mouse lens formation.
Tien T Le1, Kevin W Conley, Nadean L Brown
1Division of Developmental Biology, Children's Hospital Research Foundation, Department of Pediatrics, University of Cincinnati College of Medicine, 3333 Burnet Avenue, Cincinnati, OH 45229, USA.
Developmental Biology
|April 25, 2009
Summary
Jagged1 is essential for lens development in mammals. Its absence disrupts progenitor cell proliferation and differentiation, leading to severe eye deformities and complete lens loss.
Area of Science:
- Developmental biology
- Ophthalmology
- Cell signaling
Background:
- Lens development involves distinct waves of fiber cell differentiation.
- Progenitor cells in the anterior growth zone differentiate at the lens equator.
- The Notch signaling pathway is crucial for lens progenitor cell development, but its ligands are unknown.
Purpose of the Study:
- To identify the specific ligand(s) involved in Notch-mediated lens development.
- To investigate the role of Jagged1 in lens fiber cell genesis and progenitor cell regulation.
Main Methods:
- Conditional gene targeting in mammals.
- Analysis of lens development in Jagged1 conditional mutants.
Main Results:
- Jagged1 is required for secondary fiber cell development.
- Absence of Jagged1 leads to underdeveloped anterior growth and transition zones.
- Jagged1 conditional mutants exhibit complete lens absence and anterior chamber deformities in adults.
Conclusions:
- Jagged1-Notch signaling is indispensable for lens progenitor cell proliferation and differentiation.
- Jagged1 acts as a critical lateral inductive signal in mammalian lens development.
