Abstract
For eyes with diabetic retinopathy which require vitreous surgery and pan-retinal photocoagulation (PrP), pre-treatment of PrP before vitreous surgery reduce the activity of diabetic retinopathy, however sometimes cause macular edema leading to visual disturbance. some cytokines in the vitreous increase in eyes with diabetic macular edema, thus the relationship between PrP and vitreous cytokines is to be inves-tigated. In this study, 72 eligible eyes of 65 patients were recruited, and 36 eyes had pre-treatment of PrP before vitreous surgery. the other 36 eyes were served as control which had PrP not before but under sur-gery. There was no statistical significant difference of systemic conditions between two groups. All eyes had pars plana vitrectomy, and 1 ml of vitreous sample was obtained under the surgery. Vascular endothelial growth factor (VEGF) and interleukin-6 (IL-6) in the vitreous sample were measured in each case. After the completion of pre-treatment of PRP, macular edema defined as increase of foveal thickness was prominently worsened, and the vitreous level of IL-6 in PrP pre-treated group showed statistically higher than that in control. In contrast, there was no significant difference of VEGF level between two groups. While, vitreous level of VEGF in control group was strongly correlated with grade of retinopathy and duration of diabetes. In conclusion, PRP influenced vitreous level of IL-6 but not VEGF, leading to macular edema, which sug-gests that IL-6 plays critical roles of PrP induced macular edema.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.