Effect of oral tranexamic acid on macular edema associated with retinal vein occlusion or diabetes
Authors Takeyama M, Takeuchi F, Gosho M, Sugita K, Zako M, Iwaki M, Kamei M
Received 25 August 2017
Accepted for publication 22 November 2017
Published 20 December 2017 Volume 2018:12 Pages 35—41
Checked for plagiarism Yes
Review by Single-blind
Peer reviewers approved by Dr Colin Mak
Peer reviewer comments 2
Editor who approved publication: Dr Scott Fraser
Masayuki Takeyama,1 Fumio Takeuchi,2 Masahiko Gosho,3 Keijiro Sugita,1 Masahiro Zako,4 Masayoshi Iwaki,5 Motohiro Kamei1
1Department of Ophthalmology, Aichi Medical University, Nagakute, 2Department of Biochemistry, Aichi Medical University, Nagakute, 3Department of Clinical Trial and Clinical Epidemiology, Faculty of Medicine, University of Tsukuba, Tsukuba, 4Department of Ophthalmology, Asia Hospital, Seto, 5Department of Ophthalmology, Yokkaichi, Digestive Disease Center, Komono, Japan
Purpose: Tranexamic acid (TXA) is a widely used antifibrinolytic agent that can also cause a decrease in vascular permeability. We hypothesized that TXA could improve macular edema (ME) that is caused by an increase in retinal vascular permeability. The aim of this study is to evaluate the efficacy of oral TXA for ME associated with retinal vein occlusion (RVO) or diabetic ME (DME).
Patients and methods: Oral TXA (1,500 mg daily for 2 weeks) was administered to patients with persistent ME secondary to RVO (7 eyes) and DME (7 eyes). After 2 weeks (ie, the final day of administration) and 6 weeks (ie, 4 weeks after the final administration), best-corrected visual acuity and central macular thickness (CMT) were measured and compared with baseline. Analyses were performed for RVO and DME cases. No other treatment was performed during the study period.
Results: In RVO cases, significant improvement in CMT was found between baseline (467.7±121.4 µm) and 2-week measurements after treatment (428.7±110.5 µm, p=0.024). No significant change was found in CMT between measurements taken at baseline and 6 weeks after treatment. In DME cases, no significant change was found in CMT between measurements taken at baseline and 2 or 6 weeks after treatment. In all analyses of best-corrected visual acuity, no significant change was observed.
Conclusion: The results support the hypothesis that plasmin plays a role in the development of ME associated with RVO, and oral TXA administration may be useful as an adjuvant treatment when combined with other agents such as anti-vascular endothelial growth factor.
Keywords: diabetic macular edema, fibrin, macular edema, plasmin, retinal vein occlusion, tranexamic acid
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