[Experimental model of ocular ischemic diseases]

Area of Science:

• Ophthalmology
• Neuroscience
• Physiology

Background:

• Retinal ischemia is a significant cause of vision loss.
• Understanding the mechanisms of retinal ischemia is crucial for developing effective treatments.
• Existing models vary in their ability to replicate human ocular ischemic conditions.

Purpose of the Study:

• To review and compare common in vitro and in vivo methods for modeling retinal ischemia.
• To highlight the advantages and disadvantages of each modeling technique.
• To discuss the utility of these models in advancing the diagnosis and treatment of retinal and optic nerve diseases.

Main Methods:

• In vitro methods include chemical ischemia (iodoacetic acid), oligomycin treatment of retinal pigment epithelium cells, and oxygen- and glucose-deprived conditions.
• In vivo methods encompass increased intraocular pressure, cerebral artery occlusion, carotid artery ligation, retinal vessel photocoagulation, central retinal artery occlusion, and endothelin-1 administration.
• Rat models are frequently used due to similarities in ocular blood supply to humans.

Main Results:

• Various methods exist for inducing retinal ischemia, each with specific applications and limitations.
• Endothelin-1 administration offers a straightforward method for creating models of ocular ischemic disease, particularly those mimicking glaucoma or arterial occlusions.
• Rat models are prevalent due to their physiological relevance to human ocular circulation.

Conclusions:

• The choice of retinal ischemia model depends on the specific research question and desired outcome.
• Accurate experimental models are essential for elucidating microcirculation impairment mechanisms in ischemic ocular diseases.
• Advancements in modeling contribute to improved diagnostic and therapeutic strategies for retinal and optic nerve ischemia.