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Complement-derived anaphylatoxins in human donor corneas treated with excimer laser
B P Gardner1, U Pleyer, B J Mondino
1Department of Ophthalmology, UCLA School of Medicine, USA.
Ophthalmic Surgery and Lasers
|November 1, 1995
Summary
Excimer laser photorefractive keratectomy (PRK) did not significantly increase complement anaphylatoxins in human corneas. This suggests the laser treatment, at this dose, does not trigger a significant inflammatory complement response post-surgery.
Area of Science:
- Ophthalmology
- Immunology
- Laser Surgery
Background:
- Post-photorefractive keratectomy (PRK) inflammation may cause corneal haze and refractive error regression.
- Complement-derived anaphylatoxins are potent inflammatory mediators implicated in wound healing.
Purpose of the Study:
- To investigate the role of complement activation in excimer laser PRK.
- To determine if specific complement anaphylatoxins (C3a, C4a, C5a) are elevated after PRK treatment.
Main Methods:
- Human donor corneas underwent a 6-diopter excimer laser PRK treatment.
- Control corneas were used for comparison.
- Corneal eluates were analyzed for C3a, C4a, and C5a levels using radioimmunoassay after incubation and elution.
Main Results:
- No significant increase in C3a, C4a, or C5a levels was observed in PRK-treated corneas compared to controls.
- Statistical analysis showed P > .05, indicating no significant difference.
Conclusions:
- The findings suggest that excimer laser treatment at the specified dose does not induce significant complement activation in the cornea.
- This implies that complement anaphylatoxins may not play a major role in the inflammatory response following this type of PRK procedure.