Limbal and corneal epithelial homeostasis
Ghasem Yazdanpanah1, Sayena Jabbehdari, Ali R Djalilian
1Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, Illinois, USA.
Current Opinion in Ophthalmology
|April 12, 2017
Summary
Limbal epithelial stem cells (LESCs) within the limbal niche are crucial for corneal epithelial homeostasis and wound healing. Therapies should focus on regenerating this specialized microenvironment for effective treatment.
Area of Science:
- Ophthalmology
- Stem Cell Biology
- Regenerative Medicine
Background:
- Corneal epithelial homeostasis relies on continuous replenishment of shed cells.
- Limbal epithelial stem cells (LESCs) are the primary source for this regeneration.
- The limbal niche, a specialized microenvironment, is essential for LESC function.
Purpose of the Study:
- To elucidate the mechanisms of corneal epithelial homeostasis.
- To highlight the critical role of LESCs and the limbal niche in epithelial regeneration and wound healing.
Main Methods:
- Review of current literature on corneal stem cell biology.
- Analysis of the limbal niche's composition and function.
- Evaluation of therapeutic strategies for limbal stem cell deficiency.
Main Results:
- LESCs in the limbus constantly replenish the corneal epithelium.
- The limbal niche, comprising cells, extracellular matrix, and signaling molecules, dictates LESC function.
- Dysfunction of the limbal niche leads to LESC deficiency.
Conclusions:
- The limbal niche is the key determinant of LESC function.
- Corneal epithelial regeneration is driven by LESCs housed in the limbal niche.
- Future therapies must prioritize the regeneration of the limbal niche microenvironment.
