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Published on: September 12, 2014
Topical rewetting restores the autoimmune-damaged corneal stroma
Yael Efraim1, Yu Ting Chen1, Luye An1
1Department of Cell & Tissue Biology, School of Dentistry, University of California, San Francisco, San Francisco, CA 94143, USA.
Iscience
|June 8, 2026
Summary
Corneal rewetting, even with simple saline, can restore eye tissue structure and function in dry eye disease models. This challenges the view that treatments are only palliative, revealing a regenerative potential.
Area of Science:
- Ophthalmology
- Regenerative Medicine
- Cell Biology
Background:
- Corneal wetting is a common palliative treatment for dry eye disease.
- The regenerative potential of corneal rewetting remains largely unexplored.
Purpose of the Study:
- To investigate the regenerative capacity of corneal rewetting in a dry eye model.
- To determine if simple rewetting agents can restore corneal structure and keratocyte function.
Main Methods:
- Utilized an aqueous-deficient mouse model of dry eye.
- Employed transmission electron microscopy to assess stromal architecture.
- Conducted single-cell transcriptomic analysis to evaluate keratocyte phenotypes and signaling pathways.
Main Results:
- Phosphate-buffered saline (PBS) rewetting significantly restored disrupted corneal stromal organization and reduced edema.
- Stromal keratocytes shifted from an inflammatory to a reparative phenotype post-rewetting.
- Rewetting dampened IL-1β associated MAPK signaling, contributing to the reparative shift.
Conclusions:
- Corneal rewetting possesses unexpected regenerative capabilities, challenging its purely palliative role in dry eye disease.
- Simple rewetting agents can induce significant structural and cellular repair in the cornea.
- These findings redefine the therapeutic impact of corneal rewetting for dry eye treatment.
