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Fazel F, Malekahmadi M, Feizi A, Oliya B, Tavakoli M, Fazel M. Suprachoroidal injection of triamcinolone acetonide plus intravitreal bevacizumab in diabetic macular edema: a randomized pilot trial. BMC Ophthalmol 2023; 23:40. [PMID: 36707790 PMCID: PMC9881520 DOI: 10.1186/s12886-023-02790-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 01/20/2023] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND To investigate the efficacy of injecting suprachoroidal triamcinolone acetonide (SCTA) plus intravitreal bevacizumab (IVB) into patients with center-involving diabetic macular edema (CI-DME). METHODS In this phase 2/3 randomized controlled pilot trial, sixty-six eyes with CI-DME and best-corrected visual acuity (BCVA) of at most 20/50 Snellen chart were randomly assigned into two groups. Monotherapy arm received sham injection plus 3 monthly IVB doses and combination arm received a single dose of SCTA and 3 monthly IVB doses. The mean improvements in BCVA and Central subfield thickness (CST), over the three-month was considered the main efficacy outcomes. RESULTS The mean BCVA improvements were obtained respectively as - 0.20 ± 0.20 log [minimum angle of resolution (MAR)] (P = 0.004) and 0.37 ± 0.24 log MAR (P < 0.001) in monotherapy and combination arms [between-group analysis (P = 0.014)]. Significant improvements were also observed in CST (P = 0.019) in the combination arm compared to the other. No adverse events (elevated intraocular pressure, cataract) were observed in any of the study arms. CONCLUSION Significant improvements in BCVA and retinal anatomical outcomes demonstrated the additive effects of SCTA to those of anti-vascular endothelial growth factors with no short-term side effects and this combination appears to be a promising option in the management of patients with CI-DME. TRIAL REGISTRATION The trial was registered in Iranian Registry of Clinical Trials (IRCT20200314046761N1).
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Affiliation(s)
- Farhad Fazel
- grid.411036.10000 0001 1498 685XIsfahan Eye Research Center, Department of Ophthalmology, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohammad Malekahmadi
- grid.411036.10000 0001 1498 685XIsfahan Eye Research Center, Department of Ophthalmology, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Awat Feizi
- grid.411036.10000 0001 1498 685XCardiac Rehabilitation Research Center, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Behrooz Oliya
- grid.411036.10000 0001 1498 685XIsfahan Eye Research Center, Department of Ophthalmology, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mehdi Tavakoli
- grid.411036.10000 0001 1498 685XIsfahan Eye Research Center, Department of Ophthalmology, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohammadreza Fazel
- grid.411036.10000 0001 1498 685XIsfahan Eye Research Center, Department of Ophthalmology, Isfahan University of Medical Sciences, Isfahan, Iran
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Patil NS, Mihalache A, Hatamnejad A, Popovic MM, Kertes PJ, Muni RH. Intravitreal steroids compared to anti-vascular endothelial growth factor treatment for diabetic macular edema: a meta-analysis. Ophthalmol Retina 2022; 7:289-299. [PMID: 36272716 DOI: 10.1016/j.oret.2022.10.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 10/10/2022] [Accepted: 10/11/2022] [Indexed: 11/06/2022]
Abstract
TOPIC Diabetic macular edema (DME) can be treated with either intravitreal anti-VEGF injections or intravitreal corticosteroid injections. CLINICAL RELEVANCE We provide an updated meta-analysis of the comparative efficacy and safety of intravitreal steroids and anti-VEGF agents for DME. METHODS A systematic search was performed on Ovid MEDLINE, Embase, and Cochrane Controlled Register of Trials from January 2005 to November 2021. Inclusion criteria included published randomized clinical trial data comparing the efficacy and safety of intravitreal steroids versus anti-VEGF agents for DME. Nonrandomized, noncomparative, and non-English studies were excluded. RESULTS Fourteen randomized clinical trials reporting on 827 eyes were included. Between these 2 treatments, our analysis revealed no significant difference in best-corrected visual acuity (BCVA) outcomes at 3 months (P = 0.11), 6 months (P = 0.21), 12 months (P = 0.24), and final follow-up (P = 0.91). Retinal thickness was significantly lower with steroid treatment at 3 months (P = 0.04), 6 months (P < 0.00001), and final follow-up (weighted mean difference = 39.99 μm; 95% confidence interval [CI] = 14.58,65.41; P = 0.002); however, there was no significant difference at 12 months (P = 0.18). Intravitreal anti-VEGF agents were associated with a lower incidence of intraocular pressure-related adverse events (risk ratio = 0.13; 95% CI = 0.05, 0.34; P < 0.00001). There was no significant difference between comparators for other adverse events, including cataract-related adverse events (P = 0.22). CONCLUSIONS Overall, intravitreal steroid treatment for DME was associated with no significant differences in BCVA, a significantly lower retinal thickness, and a higher risk of intraocular pressure-related events. The certainty of evidence ranged from low to moderate and the analysis was limited by heterogeneity. Our results reinforce the importance of a continual reevaluation of the role of intravitreal steroids in DME management. FINANCIAL DISCLOSURE(S) Proprietary or commercial disclosure may be found after the references.
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Affiliation(s)
- Nikhil S Patil
- Michael DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Andrew Mihalache
- Schulich School of Medicine and Dentristry, University of Western Ontario, London, Ontario, Canada
| | - Amin Hatamnejad
- Michael DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Marko M Popovic
- Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, Ontario, Canada
| | - Peter J Kertes
- Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, Ontario, Canada; John and Liz Tory Eye Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - Rajeev H Muni
- Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, Ontario, Canada; Department of Ophthalmology, St. Michael's Hospital/Unity Health Toronto, Toronto, Ontario, Canada.
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Özata Gündoğdu K, Doğan E, Çelik E, Alagöz G. Serum inflammatory marker levels in serous macular detachment secondary to diabetic macular edema. Eur J Ophthalmol 2022; 32:3637-3643. [PMID: 35225038 DOI: 10.1177/11206721221083465] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
PURPOSE To evaluate the serum inflammatory marker levels in serous macular detachment (SMD) secondary to diabetic macular edema (DME). MATERIAL AND METHODS Patients with DME were divided into two groups according to the presence of SMD. Group 1 consisted of 40 patients with SMD, Group 2 consisted of 40 patients without SMD, and Group 3 consisted of 40 healthy subjects. Neutrophil and mean platelet volume (MPV) were obtained from blood samples. The neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), and the systemic immune inflammation index (SII) were calculated. In Group 1 and 2 sub-group analysis was done according to grade of diabetic retinopathy (DR) and the results were analyzed in these subgroups. RESULTS The neutrophils, MPV, NLR, and SII levels were significantly higher in Group 1 (p = 0.000, p = 0.004, p = 0.000, p = 0.001, respectively). In subgroup analysis; the neutrophils, NLR, and SII levels were significantly higher in patients with proliferative DR (p = 0.044, p = 0.046, p = 0.046, respectively) and the SII levels were significantly higher in patients with severe nonproliferative DR in Group 1 (p = 0.039). The mean CMT values were 548.8 ± 138.3 µm in Group 1 and 420.1 ± 112.7 µm in Group 2. The CMT values were significantly higher in Group 1 (p: 0.000). However, there was no significant correlation between the CMT values and the systemic inflamatuar markers levels (p>0.05) in both of the groups. CONCLUSIONS NLR and SII levels were significantly higher in DME with SMD, especially in advanced cases. Elevated serum inflammatory markers might be associated with a higher incidence of SMD.
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Affiliation(s)
- Kübra Özata Gündoğdu
- Department of Ophthalmology, 175679Sakarya University Education and Research Hospital, Sakarya, Turkey
| | - Emine Doğan
- Department of Ophthalmology, 175679Sakarya University Education and Research Hospital, Sakarya, Turkey
| | - Erkan Çelik
- Department of Ophthalmology, 175679Sakarya University Education and Research Hospital, Sakarya, Turkey
| | - Gürsoy Alagöz
- Department of Ophthalmology, 175679Sakarya University Education and Research Hospital, Sakarya, Turkey
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Wu Q, Zhang B, Hu Y, Liu B, Cao D, Yang D, Peng Q, Zhong P, Zeng X, Xiao Y, Li C, Fang Y, Feng S, Huang M, Cai H, Yang X, Yu H. DETECTION OF MORPHOLOGIC PATTERNS OF DIABETIC MACULAR EDEMA USING A DEEP LEARNING APPROACH BASED ON OPTICAL COHERENCE TOMOGRAPHY IMAGES. Retina 2021; 41:1110-1117. [PMID: 33031250 PMCID: PMC8078116 DOI: 10.1097/iae.0000000000002992] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE To develop a deep learning (DL) model to detect morphologic patterns of diabetic macular edema (DME) based on optical coherence tomography (OCT) images. METHODS In the training set, 12,365 OCT images were extracted from a public data set and an ophthalmic center. A total of 656 OCT images were extracted from another ophthalmic center for external validation. The presence or absence of three OCT patterns of DME, including diffused retinal thickening, cystoid macular edema, and serous retinal detachment, was labeled with 1 or 0, respectively. A DL model was trained to detect three OCT patterns of DME. The occlusion test was applied for the visualization of the DL model. RESULTS Applying 5-fold cross-validation method in internal validation, the area under the receiver operating characteristic curve for the detection of three OCT patterns (i.e., diffused retinal thickening, cystoid macular edema, and serous retinal detachment) was 0.971, 0.974, and 0.994, respectively, with an accuracy of 93.0%, 95.1%, and 98.8%, respectively, a sensitivity of 93.5%, 94.5%, and 96.7%, respectively, and a specificity of 92.3%, 95.6%, and 99.3%, respectively. In external validation, the area under the receiver operating characteristic curve was 0.970, 0.997, and 0.997, respectively, with an accuracy of 90.2%, 95.4%, and 95.9%, respectively, a sensitivity of 80.1%, 93.4%, and 94.9%, respectively, and a specificity of 97.6%, 97.2%, and 96.5%, respectively. The occlusion test showed that the DL model could successfully identify the pathologic regions most critical for detection. CONCLUSION Our DL model demonstrated high accuracy and transparency in the detection of OCT patterns of DME. These results emphasized the potential of artificial intelligence in assisting clinical decision-making processes in patients with DME.
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Affiliation(s)
- Qiaowei Wu
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, the Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Bin Zhang
- School of Computer Science and Engineering, South China University of Technology, Guangzhou, China
| | - Yijun Hu
- Aier Institute of Refractive Surgery, Refractive Surgery Center, Guangzhou Aier Eye Hospital, Guangzhou, China
- Aier School of Ophthalmology, Central South University, Changsha, China
| | - Baoyi Liu
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, the Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Dan Cao
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, the Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Dawei Yang
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, the Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
- Shantou University Medical College, Shantou, China; and
| | - Qingsheng Peng
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, the Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
- Shantou University Medical College, Shantou, China; and
| | - Pingting Zhong
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, the Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
- Shantou University Medical College, Shantou, China; and
| | - Xiaomin Zeng
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, the Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Yu Xiao
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, the Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Cong Li
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, the Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Ying Fang
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, the Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Songfu Feng
- Department of Ophthalmology, Zhujiang Hospital of Southern Medical University, Guangzhou, China
| | - Manqing Huang
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, the Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Hongmin Cai
- School of Computer Science and Engineering, South China University of Technology, Guangzhou, China
| | - Xiaohong Yang
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, the Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Honghua Yu
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, the Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
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Ţălu Ş, Nicoara SD. Malfunction of outer retinal barrier and choroid in the occurrence and progression of diabetic macular edema. World J Diabetes 2021; 12:437-452. [PMID: 33889289 PMCID: PMC8040083 DOI: 10.4239/wjd.v12.i4.437] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 02/23/2021] [Accepted: 03/24/2021] [Indexed: 02/06/2023] Open
Abstract
Diabetic macular edema (DME) is the most common cause of vision loss in diabetic retinopathy, affecting 1 in 15 patients with diabetes mellitus (DM). The disruption of the inner blood-retina barrier (BRB) has been largely investigated and attributed the primary role in the pathogenesis and progression in DME, but there is increasing evidence regarding the role of outer BRB, separating the RPE from the underlying choriocapillaris, in the occurrence and evolution of DME. The development of novel imaging technologies has led to major improvement in the field of in vivo structural analysis of the macula allowing us to delve deeper into the pathogenesis of DME and expanding our vision regarding this condition. In this review we gathered the results of studies that investigated specific outer BRB optical coherence tomography parameters in patients with DM with the aim to outline the current status of its role in the pathogenesis and progression of DME and identify new research pathways contributing to the advancement of knowledge in the understanding of this condition.
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Affiliation(s)
- Ştefan Ţălu
- Directorate of Research, Development and Innovation Management (DMCDI), Technical University of Cluj-Napoca, Cluj-Napoca 400020, Romania
| | - Simona Delia Nicoara
- Department of Ophthalmology, Iuliu Haţieganu University of Medicine and Pharmacy, Cluj-Napoca 400012, Romania
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Bayat AH, Elçioğlu MN. Effects of dexamethasone treatment on serous retinal detachment in ranibizumab-resistant diabetic macular edema. Ther Adv Ophthalmol 2020; 12:2515841420971936. [PMID: 33225213 PMCID: PMC7658505 DOI: 10.1177/2515841420971936] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 10/16/2020] [Indexed: 11/16/2022] Open
Abstract
Purpose To evaluate outcome of intravitreal dexamethasone implant (IDI) treatment on serous retinal detachment (SRD) in patients with ranibizumab-resistant diabetic macular edema (DME). Materials and methods Forty-eight eyes of 48 patients with DME resistant to ranibizumab were enrolled in this retrospective and comparative study. Patients were divided into two groups according to presence of serous retinal detachment: (1) SRD or (2) non-SRD groups. All patients had at least three monthly ranibizumab injections, after which they were treated with IDI. The best-corrected visual acuity (BCVA), central retinal thickness (CRT), use of antiglaucomatous drugs, and presence of cataract progression were noted at 1, 3, and 6 months post-IDI treatment. Results There was not any statistically significant difference in terms of baseline characteristics of the patients. The mean CRT was declined in both groups at 1, 3, and 6 months (p < 0.001). After IDI treatment, the mean BCVA was improved in both groups at 1, 3, and 6 months (p < 0.001). When groups were compared, the change in CRT was higher in the SRD group (p = 0.018), while there was no statistically significant difference between groups in terms of BCVA changes (p = 0.448). Conclusion The presence of SRD resulted in higher anatomical gain. SRD had no effects on visual changes after dexamethasone treatment in patients with ranibizumab-resistant DME.
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Affiliation(s)
- Alper Halil Bayat
- Department of Ophthalmology, Esenler Hospital, Medipol University, Birlik mah. Bahçeler cad. No:5, Esenler, 34083 İstanbul, Turkey
| | - Mustafa Nuri Elçioğlu
- Department of Ophthalmology, Okmeydanı Training and Research Hospital, University of Health Sciences, İstanbul, Turkey
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Hu Y, Wu Q, Liu B, Huang M, Peng Q, Zhong P, Zeng X, Xiao Y, Li C, Fang Y, Li T, Yu H, Yang X. Restoration of Foveal Bulge after Resolution of Diabetic Macular Edema with Coexisting Serous Retinal Detachment. J Diabetes Res 2020; 2020:9705786. [PMID: 32626784 PMCID: PMC7313106 DOI: 10.1155/2020/9705786] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 05/27/2020] [Indexed: 02/05/2023] Open
Abstract
PURPOSE To evaluate the impact of restoration of foveal bulge (FB) in optical coherence tomography (OCT) images on visual acuity after resolution of diabetic macular edema with coexisting serous retinal detachment (SRD-DME). METHODS A total of 52 eyes with resolved SRD-DME and an intact ellipsoid zone at the central fovea were included. All eyes underwent best-corrected visual acuity (BCVA) examination and OCT scanning at baseline and follow-up visits (1, 3, and 6 months). The eyes were divided into two groups according to the presence of FB at 6 months. BCVA, central foveal thickness (CFT), height of SRD (SRDH), outer nuclear layer (ONL) thickness, photoreceptor inner segment (PIS), and outer segment (POS) length were compared between the two groups. RESULTS A FB was found in 25 of 52 (48%) eyes at 6 months. The FB (+) group had lower SRDH at baseline, and better BCVA, longer POS length at 6 months (all P < 0.05). There was no significant difference in the CFT, ONL thickness, and PIS length at 6 months between the two groups (all P > 0.05). More eyes in the FB (+) group had complete SRD resolution at 1 month (P = 0.009) and 3 months (P = 0.012). Eyes with complete SRD resolution at 1 month (P = 0.009) or 3 months (P = 0.012) were more likely to have a FB at 6 months. CONCLUSIONS The Presence of the FB is associated with better BCVA after resolution of SRD-DME. Eyes with lower baseline SRDH or faster SRD resolution are more likely to have a FB at 6 months.
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Affiliation(s)
- Yijun Hu
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences/the Second School of Clinical Medicine, Southern Medical University, Guangzhou 510080, China
- Aier Institute of Refractive Surgery, Refractive Surgery Center, Guangzhou Aier Eye Hospital, Guangzhou 510199, China
- Aier School of Ophthalmology, Central South University, Changsha 410021, China
| | - Qiaowei Wu
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences/the Second School of Clinical Medicine, Southern Medical University, Guangzhou 510080, China
| | - Baoyi Liu
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences/the Second School of Clinical Medicine, Southern Medical University, Guangzhou 510080, China
| | - Manqing Huang
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences/the Second School of Clinical Medicine, Southern Medical University, Guangzhou 510080, China
| | - Qingsheng Peng
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences/the Second School of Clinical Medicine, Southern Medical University, Guangzhou 510080, China
- Shantou University Medical College, Shantou 515041, China
| | - Pingting Zhong
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences/the Second School of Clinical Medicine, Southern Medical University, Guangzhou 510080, China
- Shantou University Medical College, Shantou 515041, China
| | - Xiaomin Zeng
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences/the Second School of Clinical Medicine, Southern Medical University, Guangzhou 510080, China
| | - Yu Xiao
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences/the Second School of Clinical Medicine, Southern Medical University, Guangzhou 510080, China
| | - Cong Li
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences/the Second School of Clinical Medicine, Southern Medical University, Guangzhou 510080, China
| | - Ying Fang
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences/the Second School of Clinical Medicine, Southern Medical University, Guangzhou 510080, China
| | - Tao Li
- State Key Laboratory of Ophthalmology, Clinical Research Center for Ocular Disease, Zhongshan Ophthalmic Centre, Sun Yat-sen University, Guangzhou 510060, China
| | - Honghua Yu
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences/the Second School of Clinical Medicine, Southern Medical University, Guangzhou 510080, China
| | - Xiaohong Yang
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences/the Second School of Clinical Medicine, Southern Medical University, Guangzhou 510080, China
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Comparison of clinical outcomes of different components of diabetic macular edema on optical coherence tomography. Graefes Arch Clin Exp Ophthalmol 2019; 257:2613-2621. [PMID: 31529324 DOI: 10.1007/s00417-019-04471-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 08/27/2019] [Accepted: 09/05/2019] [Indexed: 10/26/2022] Open
Abstract
PURPOSE To evaluate the edema reduction after intravitreal injection of ranibizumab (IVR) in two diabetic macular edema (DME) components in the same eye using optical coherence tomography (OCT). METHODS Totally 113 eyes with mixed OCT pattern of DME were included. All the eyes underwent best-corrected visual acuity (BCVA) examination and OCT scanning at baseline and follow-up visits (1, 3, and 6 months after 3 monthly consecutive IVR). The mixed OCT pattern of DME was classified into 2 OCT components: serous retinal detachment (SRD) component and non-SRD component. Foveal thickness of the SRD component (SRDFT) and the non-SRD component (NSRDFT) was compared between baseline and follow-up visits. Reduction and reduction ratio of the SRDFT and the NSRDFT at each follow-up were compared. When calculating the NSRDFT reduction ratio, we innovatively optimized a commonly used formula by subtracting the normal foveal thickness from the baseline NSRDFT. RESULTS SRDFT was 265.6 ± 175.4 μm at baseline and was significantly decreased to 126.7 ± 114.4 μm at 1 month, to 110.5 ± 103.4 μm at 3 months, and to 110.4 ± 89.6 μm at 6 months (all P < 0.001). NSRDFT was 409.5 ± 173.1 μm at baseline and was significantly decreased to 274.1 ± 140.4 μm at 1 month, to 249.1 ± 95.9 μm at 3 months, and to 254.1 ± 90.4 μm at 6 months (all P < 0.001). There was no significant difference in reduction or reduction ratio between NSRDFT and SRDFT during follow-up (all P > 0.05). The correlation between BCVA and SRDFT was most significant at baseline (r = 0.366, P < 0.001) and the correlation between BCVA and NSRDFT was most significant at 6 months (r = 0.426, P < 0.001). BCVA improvement was more significantly correlated with reduction or reduction ratio of SRDFT at each follow-up timepoint (r = 0.271-0.426, all P < 0.01). CONCLUSIONS IVR was effective in reducing both the SRD and non-SRD components of DME according to our optimized formula. The association between BCVA improvement and edema reduction was more significant in the SRD component.
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Bolukbasi S, Cakir A, Erden B, Karaca G. Comparison of the short-term effect of aflibercept and dexamethasone implant on serous retinal detachment in the treatment of naive diabetic macular edema. Cutan Ocul Toxicol 2019; 38:401-405. [DOI: 10.1080/15569527.2019.1657884] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Selim Bolukbasi
- Department of Ophthalmology, University of Health Sciences, Okmeydani Training and Research Hospital, Istanbul, Turkey
| | - Akin Cakir
- Department of Ophthalmology, University of Health Sciences, Okmeydani Training and Research Hospital, Istanbul, Turkey
| | - Burak Erden
- Department of Ophthalmology, University of Health Sciences, Okmeydani Training and Research Hospital, Istanbul, Turkey
| | - Gulderen Karaca
- Department of Ophthalmology, University of Health Sciences, Okmeydani Training and Research Hospital, Istanbul, Turkey
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10
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Chung YR, Kim YH, Ha SJ, Byeon HE, Cho CH, Kim JH, Lee K. Role of Inflammation in Classification of Diabetic Macular Edema by Optical Coherence Tomography. J Diabetes Res 2019; 2019:8164250. [PMID: 31930145 PMCID: PMC6939426 DOI: 10.1155/2019/8164250] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 11/30/2019] [Indexed: 12/22/2022] Open
Abstract
Diabetic macular edema (DME) is the abnormal accumulation of fluid in the subretinal or intraretinal spaces in the macula in patients with diabetic retinopathy and leads to severely impaired central vision. Technical developments in retinal imaging systems have led to many advances in the study of DME. In particular, optical coherence tomography (OCT) can provide longitudinal and microstructural analysis of the macula. A comprehensive review was provided regarding the role of inflammation using OCT-based classification of DME and current and ongoing therapeutic approaches. In this review, we first describe the pathogenesis of DME, then discuss the classification of DME based on OCT findings and the association of different types of DME with inflammation, and finally describe current and ongoing therapeutic approaches using OCT-based classification of DME. Inflammation has an important role in the pathogenesis of DME, but its role appears to differ among the DME phenotypes, as determined by OCT. It is important to determine how the different DME subtypes respond to intravitreal injections of steroids, antivascular endothelial growth factor agents, and other drugs to improve prognosis and responsiveness to treatment.
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Affiliation(s)
- Yoo-Ri Chung
- Department of Ophthalmology, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Young Ho Kim
- Department of Ophthalmology, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Seong Jung Ha
- Department of Ophthalmology, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Hye-Eun Byeon
- Institute of Medical Science, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Chung-Hyun Cho
- Vascular Microenvironment Laboratory, Department of Pharmacology, Seoul National University College of Medicine, Seoul, Republic of Korea
- Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul, Republic of Korea
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Jeong Hun Kim
- Fight against Angiogenesis-Related Blindness (FARB) Laboratory, Clinical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Republic of Korea
- Department of Ophthalmology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Kihwang Lee
- Department of Ophthalmology, Ajou University School of Medicine, Suwon, Republic of Korea
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Factors Influencing Intravitreal Bevacizumab and Triamcinolone Treatment in Patients with Diabetic Macular Edema. Eur J Ophthalmol 2018; 27:746-750. [PMID: 28430331 DOI: 10.5301/ejo.5000974] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
PURPOSE To evaluate factors associated with response to intravitreal bevacizumab (IVB) and intravitreal triamcinolone acetonide (IVTA) in diabetic macular edema (DME). METHODS Ninety-one eyes of 88 patients diagnosed with DME were enrolled in this retrospective chart review. Group 1 included eyes that showed good response to IVB. Group 2 included eyes that did not respond to IVB but responded to IVTA. Group 3 included eyes that responded to neither. Clinical factors, HbA1c, and optical coherence tomography (OCT) findings including patterns of macular edema were compared among the 3 groups. RESULTS A total of 44, 27, and 20 eyes were included in groups 1, 2, and 3, respectively. HbA1c was higher in group 3 than in the other groups. Proportion of full (combination of all patterns) type edema was higher in group 3 than in the other 2 groups. In group 1, the proportion of sponge-like diffuse retinal thickening type was higher and cystoid macular edema type was lower than in the other groups. CONCLUSIONS The degree of diabetic control and morphologic subtypes with OCT should be considered to better predict the prognosis after treatment in DME.
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Cho YJ, Lee DH, Kim M. Optical coherence tomography findings predictive of response to treatment in diabetic macular edema. J Int Med Res 2018; 46:4455-4464. [PMID: 30259774 PMCID: PMC6259392 DOI: 10.1177/0300060518798503] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Objective To evaluate the short-term efficacy of intravitreal bevacizumab (IVB) and posterior sub-tenon triamcinolone injections (PSTI) on the basis of spectral-domain optical coherence tomography (SD-OCT) patterns in diabetic macular edema (DME). Methods We retrospectively reviewed 73 eyes of 73 patients with DME. Based on the presence of serous retinal detachment (SRD), eyes were categorized into two groups, and either IVB or PSTI treatment was performed. Central macular thickness (CMT) and the degree of SRD were assessed preoperatively and 1 month postoperatively. The severity of intraretinal edema was approximated based on the distance from the external limiting membrane to the internal limiting membrane. Results In eyes with SRD, reduction of SRD was greater with IVB than with PSTI. Moreover, reduction of intraretinal edema was greater with PSTI than with IVB. In eyes without SRD, PSTI achieved greater CMT reduction, compared with IVB. Conclusions In DME patients with SRD, IVB achieved greater reduction of SRD, compared with PSTI; however, intraretinal edema responded more favorably to PSTI, regardless of the presence of SRD. Our results suggest that the classification of DME based on OCT findings may be useful to predict responses to IVB or PSTI treatments.
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Affiliation(s)
- Young Joo Cho
- 1 Department of Ophthalmology, HanGil Eye Hospital, Incheon, Korea
| | - Dong Hyun Lee
- 2 Institute of Vision Research, Department of Ophthalmology, Severance Eye and ENT Hospital, Yonsei, University College of Medicine, Seoul, Republic of Korea
| | - Min Kim
- 3 Department of Ophthalmology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
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13
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Demircan A, Ozkaya A, Alkin Z, Kemer B, Yesilkaya C, Demir G. Comparison of the effect of ranibizumab and dexamethasone implant on serous retinal detachment in diabetic macular edema. J Fr Ophtalmol 2018; 41:733-738. [PMID: 30213609 DOI: 10.1016/j.jfo.2018.03.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 03/08/2018] [Accepted: 03/15/2018] [Indexed: 11/17/2022]
Abstract
PURPOSE To compare the efficacy of intravitreal ranibizumab (IVR) and intravitreal dexamethasone implant (IDI) on neurosensory retinal detachment (SRD) associated with diabetic macular edema (DME) in the early treatment period. METHODS This was a retrospective, interventional, case-control study. After three monthly loading doses of IVR or an initial IDI injection, the changes in best-corrected visual acuity (BCVA), central macular thickness (CMT) on OCT, and presence and height of SRD were evaluated. RESULTS The IVR and IDI groups consisted of 101 and 35 eyes, respectively. The mean changes in CMT in the IVR and IDI groups were 204.4±176.6 and 311.4±163, respectively (P<0.001). The mean changes in SRD height in the IVR and IDI groups were 133.6±92.1 and 168.6±103.9μm, respectively. The decrease in SRD height was significantly greater in the IDI group than in the IVR group (P=0.002). The SRD resolved completely in 72.2% and 71.4% of the patients in the IVR and IDI groups, respectively (P=0.9). CONCLUSION The mean reduction in CMT and SRD height was greater in the IDI group than in the IVR group. There was a negative correlation between baseline best-corrected visual acuity (BCVA) and SRD height and also between BCVA and CMT.
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Affiliation(s)
- A Demircan
- University of Health Sciences, Beyoglu Eye Training and Research Hospital, Bereketzade Cami Sok. No. 2 Beyoglu, Istanbul, Turkey.
| | - A Ozkaya
- University of Health Sciences, Beyoglu Eye Training and Research Hospital, Bereketzade Cami Sok. No. 2 Beyoglu, Istanbul, Turkey
| | - Z Alkin
- University of Health Sciences, Beyoglu Eye Training and Research Hospital, Bereketzade Cami Sok. No. 2 Beyoglu, Istanbul, Turkey
| | - B Kemer
- University of Health Sciences, Beyoglu Eye Training and Research Hospital, Bereketzade Cami Sok. No. 2 Beyoglu, Istanbul, Turkey
| | - C Yesilkaya
- University of Health Sciences, Beyoglu Eye Training and Research Hospital, Bereketzade Cami Sok. No. 2 Beyoglu, Istanbul, Turkey
| | - G Demir
- University of Health Sciences, Beyoglu Eye Training and Research Hospital, Bereketzade Cami Sok. No. 2 Beyoglu, Istanbul, Turkey
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14
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Hsieh YT, Yang CM, Chang SH. Bevacizumab and Panretinal photocoagulation protect against ocular hypertension after posterior subtenon injection of triamcinolone acetonide for diabetic macular edema. J Formos Med Assoc 2017; 116:599-605. [DOI: 10.1016/j.jfma.2016.09.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Revised: 09/26/2016] [Accepted: 09/29/2016] [Indexed: 10/20/2022] Open
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15
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Lai IA, Hsu WC, Yang CM, Hsieh YT. Prognostic factors of short-term outcomes of intravitreal ranibizumab in diabetic macular edema. Int J Ophthalmol 2017; 10:765-771. [PMID: 28546935 DOI: 10.18240/ijo.2017.05.18] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2016] [Accepted: 09/29/2016] [Indexed: 01/09/2023] Open
Abstract
AIM To evaluate the prognostic factors for short-term visual and anatomical improvement of intravitreal ranibizumab (IVR) for diabetic macular edema (DME). METHODS Fifty-one eyes from 35 patients that received three consecutive monthly IVR for DME with moderate visual loss were retrospectively recruited; all cases had their baseline best-corrected visual acuity (BCVA) between 20/400 and 20/40. BCVA and central subfield thickness (CST) at baseline and month 3 were collected. Linear mixed models were used to evaluate the prognostic factors for visual and anatomical improvement at month 3. RESULTS Younger age, poorer baseline BCVA and proliferative diabetic retinopathy (PDR) were correlated with better visual improvement at month 3 (P=0.002, 0.0001 and 0.007, respectively). Thicker CST and the presence of subretinal fluid at baseline were correlated with a greater reduction in CST (P<0.0001 and P=0.018, respectively). The presence of epiretinal membrane or previous posterior subtenon injection of triamcinolone acetonide (PSTA) were associated with a smaller reduction in CST (P=0.029 and 0.018, respectively), but had no significant effects in visual improvement at month 3 (P>0.05 for both). CONCLUSION For eyes with DME and moderate visual loss, those with younger age, poorer baseline BCVA or PDR tend to have better visual improvement after three consecutive monthly IVR. Epiretinal membrane or previous PSTA result in less resolution of CST, but do not significantly affect visual improvement.
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Affiliation(s)
- I-An Lai
- Department of Ophthalmology, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei 231, Taiwan, China
| | - Wei-Cherng Hsu
- Department of Ophthalmology, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei 231, Taiwan, China.,School of Medicine, Tzu Chi University, Hualien 970, Taiwan
| | - Chung-May Yang
- Department of Ophthalmology, National Taiwan University Hospital, Taipei 10002, Taiwan, China
| | - Yi-Ting Hsieh
- Department of Ophthalmology, National Taiwan University Hospital, Taipei 10002, Taiwan, China
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16
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Abstract
Diabetic macular edema (DME), one the most prevalent causes of visual loss in industrialized countries, may be diagnosed at any stage of diabetic retinopathy. The diagnosis, treatment, and follow up of DME have become straightforward with recent developments in fundus imaging, such as optical coherence tomography. Laser photocoagulation, intravitreal injections, and pars plana vitrectomy surgery are the current treatment modalities; however, the positive effects of currently available intravitreally injected agents are temporary. At this point, further treatment choices are needed for a permanent effect.
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Affiliation(s)
- Fatih C Gundogan
- Fatih C. Gundogan, GATA Medical School, Ophthalmology, Ankara, Turkey
| | - Umit Yolcu
- Umit Yolcu, Sarikamis Military Hospital, Ophthalmology, Kars, Turkey
| | - Fahrettin Akay
- Fahrettin Akay, İzmir Military Hospital, Ophthalmology, Izmir, Turkey
| | - Abdullah Ilhan
- Abdullah Ilhan, Erzurum Military Hospital, Ophthalmology, Erzurum, Turkey
| | - Gokhan Ozge
- Gokhan Ozge, GATA Medical School, Ophthalmology, Ankara, Turkey
| | - Salih Uzun
- Salih Uzun Etimesgut Military Hospital, Ophthalmology, Ankara, Turkey
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17
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Correspondence. Retina 2015; 35:e69. [DOI: 10.1097/iae.0000000000000790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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18
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Reply. Retina 2015; 35:e69-70. [DOI: 10.1097/iae.0000000000000791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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The Vitreomacular Interface in Diabetic Retinopathy. J Ophthalmol 2015; 2015:392983. [PMID: 26425349 PMCID: PMC4573635 DOI: 10.1155/2015/392983] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Accepted: 06/11/2015] [Indexed: 12/19/2022] Open
Abstract
Diabetic retinopathy (DR) is a leading health concern and a major cause of blindness. DR can be complicated by scar tissue formation, macular edema, and tractional retinal detachment. Optical coherence tomography has found that patients with DR often have diffuse retinal thickening, cystoid macular edema, posterior hyaloid traction, and tractional retinal detachment. Newer imaging techniques can even detect fine tangential folds and serous macular detachment. The interplay of the vitreous and the retina in the progression of DR involves multiple chemokine and other regulatory factors including VEGF. Understanding the cells infiltrating pathologic membranes at the vitreomacular interface has opened up the possibility of new targets for pharmacotherapy. Vitrectomies for DR remain a vital tool to help relieve tension on the macula by removing membranes, improving edema absorption, and eliminating the scaffold for new membrane formation. Newer treatments such as triamcinolone acetonide and VEGF inhibitors have become essential as a rapid way to control DR at the vitreomacular interface, improve macular edema, and reduce retinal neovascularization. These treatments alone, and in conjunction with PRP, help to prevent worsening of the VMI in patients with DR.
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Kaur S, Yangzes S, Singh S, Sachdev N. Efficacy and safety of topical difluprednate in persistent diabetic macular edema. Int Ophthalmol 2015; 36:335-40. [PMID: 26296375 DOI: 10.1007/s10792-015-0121-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2014] [Accepted: 08/12/2015] [Indexed: 10/23/2022]
Abstract
To evaluate the efficacy and safety of treatment of diabetic macular edema (persistent type) with difluprednate ophthalmic emulsion 0.05 % (off label use). 20 patients with persistent diabetic macular edema were enrolled. In all subjects, more than 4 months had passed since prior treatment. All patients were treated with difluprednate ophthalmic emulsion 0.05 % three times daily for 3 months. At the end of 3 months the visual acuity had increased by two lines to a mean value of 0.61 ± 0.18 on logMAR from a baseline value of 0.885 ± 0.20 and the central retinal thickness had decreased from 423 ± 72.04 microns to 345 ± 68.7 microns. Hence, there was a total of 18.4 % decrease in retinal thickness on difluprednate. Major side effects included raised intraocular pressure in 20 %. Difluprednate is a potent and strong steroid which causes a rapid decrease in persistent diabetic macular edema. However, the potential side effect of raised intraocular pressure limits its use as an adjuvant therapy in non-steroid responders.
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Affiliation(s)
- Savleen Kaur
- Advanced Eye Centre, Post Graduate Institute of Medical Education and Research (PGIMER), Room no 116, Chandigarh, India.
| | - Sonam Yangzes
- Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Swati Singh
- Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
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Safety and pharmacodynamics of suprachoroidal injection of triamcinolone acetonide as a controlled ocular drug release model. J Control Release 2015; 203:109-17. [PMID: 25700623 DOI: 10.1016/j.jconrel.2015.02.021] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 02/07/2015] [Accepted: 02/15/2015] [Indexed: 11/21/2022]
Abstract
Suprachoroidal injection is an emerging technique for drug delivery to the posterior segment, which is hard to reach by non-invasive approaches. However, the injection technique varies and the associated ocular safety is not well understood. In addition, it is not clear if drug formulation is a major factor in optimizing pharmacodynamics using this technique. The current study was designed to compare the suprachoroidal injection of different drug formulations and to characterize the safety and pharmacodynamics of triamcinolone acetonide (TA) delivered by this technique. Both indocyanine green (ICG) solution and TA suspension, at 50μL, 100μL, and 150μL, were suprachoroidally injected and intraocular pressure (IOP) tonometry, fundus photography, and electroretinography were performed over multiple time points up to eight weeks. After 50μL TA (Kenalog-40) suprachoroidal injection, 4-5 animals at 7 time points were sacrificed for aqueous, vitreous, retina, and plasma collections. TA was quantitated using ultra-performance liquid chromatography tandem mass spectrometry. For comparative efficacy study, 50μL (2mg) suprachoroidal TA versus 20mg subtenon TA were performed 4weeks before induction of experimental uveitis with 10ng of intravitreal lipopolysaccharide. After suprachoroidal injection, IOP had an acute elevation, higher volume caused higher IOP (p<0.0001). Equivalent volume of ICG solution led to a significantly smaller IOP elevation than after TA suprachoroidal injection. This finding suggests better distribution of ICG solution than TA suspension in the suprachoroidal space. Following a 50μL suprachoroidal injection, peak TA concentration in the aqueous was below 1ng/mL. In contrast, the posterior vitreous and retina had 1912ng/mL and 400,369ng/mL TA, respectively. Maximum TA in plasma was 11.6ng/mL. Drug exposure to the posterior retina was 523,910 times more than that to the aqueous and 29,516 times more than systemic TA exposure. In the treatment of lipopolysaccharide-induced uveitis, compared with 20mg subtenon injection, suprachoroidal 2mg TA demonstrated much better efficacy with significantly less aqueous humor cells and lower vitreous opacity scores (p<0.05). Histology showed much less vitreous inflammation in the suprachoroidal injection group (p<0.0001). It seems that a 50μL suprachoroidal injection of TA was well tolerated in rabbit eyes and demonstrated excellent penetration into the posterior retina, providing better therapeutic effect than subtenon 20mg TA.
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