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Updated: May 23, 2026
An Alkali-burn Injury Model of Corneal Neovascularization in the Mouse
Published on: April 7, 2014
αA-crystallin in the pathogenesis and intervention of experimental murine corneal neovascularization
Wei Zhu1, Xia Qi, Shengwei Ren
1QDU-SEI Joint Ophthalmology Program, Qingdao University, China.
Abstract:
This study was to determine the potential roles of lens crystallins in the pathogenesis of corneal neovascularization (CorNV) and implications in therapy of CorNV-related diseases. Suture- or chemical burn-induced CorNV in different strains of mice were used. Changes of gene expression patterns were analyzed by microarray, and the results of interesting genes were confirmed by real-time quantitative PCR and Western blot. Mice deficient in αA-crystallin gene were used to evaluate the role of αA-crystallin in the development of CorNV. In some animals, exogenous αA-crystallin proteins were injected around time of CorNV induction. CorNV was assessed by slit-lamp, flat-mounts and histology. In BALB/C mice, the expression of α-, β-, and γ-crystallins were up-regulated at day 5 and returned to baseline level at day 10 of suture-induced CorNV, but remained up-regulated from day 6 to day 14 of chemical burn-induced CorNV. In chemical burn-induced CorNV in C57BL/6J mice, however, they were down-regulated at day 6. Corneal crystallins were down-regulated in both CorNV models at all time points in both BALB/c and C57BL/6J mice. Comparison of CorNV development in αA-crystallin-deficient mice and that in wild-type mice revealed no significant difference. Subconjunctival injection of αA-crystallin significantly attenuated suture-induced CorNV, and the inhibitory activity might be implemented by the increased expression of soluble VEGFR-1. In conclusion, the expression patterns of lens crystallins were time- and strain-dependent but different from that of corneal crystallins in mouse CorNV models. Exogenous αA-crystallin protein attenuated CorNV, potentially by increasing the expression of soluble VEGFR-1.
Insights
Lens crystallins play a role in corneal neovascularization (CorNV) pathogenesis. Exogenous alphaA-crystallin protein reduced CorNV by increasing soluble VEGFR-1, suggesting therapeutic potential for CorNV-related diseases.
Area of Science:
- Ophthalmology
- Molecular Biology
- Immunology
Background:
- Corneal neovascularization (CorNV) is a pathological process involving the growth of new blood vessels into the cornea.
- Lens crystallins, traditionally known for their role in the eye lens, have emerging roles in ocular surface diseases.
- Understanding the role of crystallins in CorNV is crucial for developing novel therapeutic strategies.
Purpose of the Study:
- To investigate the expression patterns of lens crystallins during corneal neovascularization (CorNV) in mouse models.
- To determine the specific role of alphaA-crystallin in the pathogenesis and development of CorNV.
- To evaluate the therapeutic potential of exogenous alphaA-crystallin in mitigating CorNV.
Main Methods:
- Induction of CorNV using suture or chemical burn models in different mouse strains (BALB/C, C57BL/6J).
- Gene expression analysis using microarray, real-time quantitative PCR, and Western blot.
- Assessment of CorNV using slit-lamp microscopy, flat-mounts, and histology.
- Evaluation of alphaA-crystallin-deficient mice and administration of exogenous alphaA-crystallin protein.
Main Results:
- Lens crystallin expression showed time- and strain-dependent regulation during CorNV, differing from corneal crystallins.
- AlphaA-crystallin deficiency did not significantly alter CorNV development compared to wild-type mice.
- Subconjunctival injection of alphaA-crystallin significantly attenuated suture-induced CorNV, potentially via increased soluble VEGFR-1 expression.
Conclusions:
- Lens crystallin expression is dynamically regulated during CorNV, with distinct patterns from corneal crystallins.
- Exogenous alphaA-crystallin demonstrates a therapeutic effect on CorNV, suggesting its potential in treating CorNV-related conditions.
- The mechanism of alphaA-crystallin's inhibitory effect may involve the upregulation of soluble VEGFR-1.
