epidermal-growth-factor and Corneal-Opacity

Corneal wound healing is of critical importance for the postoperative outcome of excimer laser PRK. Wound healing is a complex biological process that is well characterised at the microscopic level, but its regulation is poorly understood at the molecular level. Among various cytokines, epidermal growth factor (EGF) plays an important role in superficial wound healing. The synthesis of EGF varies individually; therefore, by determining the EGF concentration in the tear fluid, patients with increased wound healing activity might be traced.. In this study we measured the EGF concentration pre- and postoperatively in the tear fluid of 50 eyes using a ELISA test. The preoperative refraction was between -2.00 and -10.00 dioptres. The maximum follow-up was 6 months.. Preoperatively, in all eyes the EGF concentration in the tear fluid was between 0.2 and 1.7 ng/ml. In contrast, 1 week postoperatively, these values increased (0.21-22.50 ng/ml); 4 weeks postoperatively, the EGF concentration was in all eyes back to preoperative levels. In eyes with high EGF tear fluid concentration 1 week after surgery, refraction at 6 months was outside the intended correction of +/- 1.0 D. We could not find any correlation between EGF concentration and "corneal haze".. EGF may play an important role in postoperative wound healing after excimer laser PRK. Investigations concerning a pharmaceutical control of EGF should be undertaken.

Topics: Adult; Corneal Opacity; Enzyme-Linked Immunosorbent Assay; Epidermal Growth Factor; Female; Follow-Up Studies; Humans; Lasers, Excimer; Male; Myopia; Photorefractive Keratectomy; Postoperative Complications; Refraction, Ocular; Tears; Vision Disorders; Wound Healing