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Dose-dependent ultrastructural changes in rat cornea after oral methylphenidate administration
Rabet Gozil1, Gulnur Take, Meltem Bahcelioglu
1Department of Anatomy, Gazi University School of Medicine, Ankara, Turkey.
Saudi Medical Journal
|April 3, 2008
Summary
Oral methylphenidate (Ritalin) causes dose-dependent ultrastructural damage to rat corneas, affecting epithelium, stroma, and endothelium. Lower Ritalin doses are recommended to preserve corneal health.
Area of Science:
- Ophthalmology
- Pharmacology
- Cell Biology
Background:
- Methylphenidate (Ritalin) is a widely prescribed stimulant medication.
- Understanding its ocular side effects is crucial for patient safety.
Purpose of the Study:
- To investigate the dose-dependent ultrastructural changes in the rat cornea following oral methylphenidate administration.
- To assess the impact of methylphenidate on corneal cellular and stromal integrity.
Main Methods:
- The study utilized 27 female Wistar albino rats, divided into three dose groups (5, 10, 20 mg/kg) and a control group.
- Oral methylphenidate was administered, and corneal tissues were analyzed using electron microscopy.
Main Results:
- Dose-dependent degenerative changes, including apoptosis and mitochondrial damage, were observed in corneal epithelial cells.
- Increased collagen fiber, nuclear chromatin condensation, and pericellular edema were noted in the corneal stroma.
- Endothelial cells exhibited disrupted junctions, cytoplasmic vacuolization, and mitochondrial damage.
Conclusions:
- Methylphenidate induces significant, dose-dependent ultrastructural degeneration in rat corneas.
- These changes, including stromal fibrosis, negatively impact corneal hydration and physiology.
- Minimizing methylphenidate dosage is advised to maintain corneal ultrastructure and function.
