To evaluate the efficacy of intravitreal triamcinolone injection in diabetic macular edema unresponsive to intravitreal bevacizumab.
Patients with diabetic macular edema unresponsive to at least three monthly intravitreal bevacizumabs were included. At least 2 months after the last intravitreal bevacizumab, intravitreal triamcinolone was performed after obtaining an aqueous humor sample. Multiplex cytokine array was used to assay vascular endothelial growth factor, interleukin (IL)-2, IL-6, IL-8, tumor necrosis factor-α, and transforming growth factor-β2. Best-corrected visual acuity and central subfield thickness were evaluated from Month 0 to 3.
Twenty eyes were enrolled. The mean best-corrected visual acuity was 47.1 ± 18.9 letters at baseline, and significantly increased to 53.3 ± 19.7 letters at 1 month (P = 0.002) and 52.4 ± 19.1 letters at 2 months (P = 0.041). These visual gains were not sustained at 3 months (50.9 ± 18.6; P = 0.204). A decrease in central subfield thickness more than 11% of baseline occurred in 12 eyes at 1 month. Multivariate analysis showed that intraocular levels of IL-8 (β = 0.538 P = 0.006) was an independent factor for anatomic response at 1 month.
Intravitreal triamcinolone has a role in patients who are unresponsive to intravitreal bevacizumab over the short-term. Elevated intraocular IL-8 levels were related to the efficacy.
Intravitreal triamcinolone has beneficial effects in patients with diabetic macular edema who are unresponsive to bevacizumab and focal laser photocoagulation over the short-term.
*Catholic High-Performance Cell Therapy Center, College of Medicine, The Catholic University of Korea, Seoul, Korea;
†Department of Medical Life science, College of Medicine, The Catholic University of Korea, Seoul, Korea; and
‡Department of Ophthalmology, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
Reprint requests: Won Ki Lee, MD, PhD, Department of Ophthalmology, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, #505 Banpo-Dong, Seocho-Gu, Seoul 137-701, Korea; e-mail: firstname.lastname@example.org
None of the authors have any financial/conflicting interests to disclose.