Optimizing procedures for ocular radiation injury studies in the tree shrew

Area of Science:

• Ophthalmology
• Radiation Oncology
• Translational Research
• Animal Models

Background:

• Ocular radiation injury (ORI) can result from eye radiation exposure during cancer treatment, significantly impacting vision-related quality of life.
• Existing animal models, such as rodents, lack accurate ocular anatomy for simulating human ORI.
• Non-human primate models are limited by logistical and ethical considerations.

Purpose of the Study:

• To develop and optimize protocols for a tree shrew model of ocular radiation injury (ORI).
• To establish a more accurate and relevant animal model for translational research into ORI prevention and treatment.

Main Methods:

• Northern tree shrews (Tupaia belangeri) were utilized.
• Custom housing, handling, and body suits were developed to maintain physiological conditions during procedures.
• Optimized radiation delivery techniques and advanced ocular imaging were employed for ORI induction and assessment.

Main Results:

• Successful development of protocols for handling, housing, anesthesia, radiation delivery, and ocular imaging in tree shrews.
• Demonstrated ability to induce and assess ocular radiation injury (ORI) in the tree shrew model.
• Confirmed that tree shrews possess key anatomical features similar to humans, making them highly relevant for ORI studies.

Conclusions:

• The developed tree shrew model provides a highly relevant platform for studying ocular radiation injury (ORI).
• This model overcomes the anatomical limitations of rodent models and the logistical/ethical concerns of primate models.
• The optimized protocols enable future translational research aimed at preventing or treating ORI.