Optimization of a Rabbit Dry Eye Model Induced by Topical Instillation of Benzalkonium Chloride
Carlos Carpena-Torres1, Jesús Pintor2, María Jesús Pérez de Lara2
1Department of Optometry and Vision, Faculty of Optics and Optometry, Universidad Complutense de Madrid, Madrid, Spain.
Journal of Ophthalmology
|June 23, 2020
Summary
A new method using 0.2% benzalkonium chloride (BAC) effectively creates a rabbit dry eye model in just 5 days. This optimized approach significantly reduces induction time compared to the original 14-day model.
Area of Science:
- Ophthalmology
- Preclinical research
- Animal models
Background:
- Dry eye disease is a prevalent condition affecting millions worldwide.
- Current rabbit models for dry eye often require lengthy induction periods.
- Optimizing existing models can accelerate research into dry eye treatments.
Purpose of the Study:
- To optimize the benzalkonium chloride (BAC)-induced rabbit dry eye model.
- To reduce the induction time by increasing BAC concentration from 0.1% to 0.2%.
Main Methods:
- A prospective, randomized study involved 10 male New Zealand white rabbits.
- Rabbits were divided into control (saline) and treatment (0.2% BAC) groups.
- Instillation occurred twice daily for 5 consecutive days, with various ocular parameters measured.
Main Results:
- 0.2% BAC significantly increased tear secretion (without anesthesia), corneal staining, conjunctival hyperemia, and IL-6 mRNA levels.
- A significant decrease was observed in tear secretion (with anesthesia), tear breakup time, tear osmolarity, goblet cell density, and mucin cloud height.
- These changes indicate successful induction of dry eye symptoms.
Conclusions:
- Topical 0.2% BAC instillation for 5 days effectively induces a rabbit dry eye model.
- This optimized method significantly shortens the induction period compared to the original 14-day model.
- This provides a faster and potentially more efficient model for dry eye research.
