Herpes simplex keratitis treatment with vitamin A.

Area of Science:

• Ophthalmology
• Virology
• Nutritional Science

Background:

• Herpetic keratitis, an infection of the cornea caused by herpes simplex virus (HSV), can lead to significant vision impairment.
• Corticosteroids are often used to manage inflammation but can exacerbate HSV infections.
• Vitamin A plays a crucial role in immune function and epithelial health.

Purpose of the Study:

• To investigate the therapeutic potential of Vitamin A in managing experimental herpetic keratitis.
• To evaluate the effect of Vitamin A on both epithelial and stromal disease progression in a rabbit model.

Main Methods:

• Chronic experimental herpetic keratitis was induced in rabbits using PH-strain HSV and subconjunctival corticosteroid injections (triamcinolone acetonide suspension).
• Rabbits were divided into groups, with one group receiving Vitamin A treatment and a control group receiving no Vitamin A.
• Lesion severity, healing rates, and stromal disease progression were monitored and compared between groups.

Main Results:

• Vitamin A-treated rabbits exhibited milder epithelial lesions compared to untreated controls.
• Epithelial lesions in the Vitamin A group showed more rapid healing.
• A significant reduction in the incidence and severity of stromal disease was observed in Vitamin A-treated rabbits, with many developing mild or no stromal disease.

Conclusions:

• Vitamin A demonstrates a protective effect against the development and progression of experimental herpetic keratitis in rabbits.
• Vitamin A supplementation may be a beneficial adjunctive therapy for managing herpetic keratitis, potentially reducing ocular tissue damage.