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Retinal metabolic and structural alterations in response to aflibercept treatment in neovascular age-related macular degeneration.

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Authors
Jakobsen, Ditte B
Torp, Thomas L
Stefansson, Einar
Peto, Tunde
Grauslund, Jakob
Issue Date
2019-08

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Citation
Retinal metabolic and structural alterations in response to aflibercept treatment in neovascular age-related macular degeneration. 2019, 97(5):525-531 Acta Ophthalmol
Abstract
PURPOSE: Non-invasive retinal markers of disease activity could pave the way for individualized treatment in neovascular age-related macular degeneration (nAMD). We aimed to evaluate if retinal vascular oxygen saturation and calibres could predict the initial treatment response after a loading phase of intravitreal aflibercept in nAMD. METHOD: A total of 149 eyes were included (nAMD, n = 76; dry AMD, n = 30; normal eyes n = 43). Of these, 57 treatment-naïve eyes with nAMD received three monthly injections with 2.0 mg aflibercept and were subsequently stratified according to functional and structural response according to development in best-corrected visual acuity and macular retinal thickness. The retinal vascular oxygen saturation and calibres were measured prior to treatment and 1 month after the third injection. RESULTS: Patients with nAMD and dry AMD had higher retinal arteriolar oxygen saturation as compared to normal eyes (94.3% versus 95.2% versus 92.6%, p = 0.04). Thirty-nine (68.4%) and 12 (21.1%) eyes with nAMD were functional and structural responders. After the loading phase, structural nonresponders developed a higher retinal arteriolar (95.3% versus 93.3%, p = 0.03) and venular (64.7% versus 59.4%, p = 0.02) oxygen saturation, and responders developed a lower retinal arteriolar calibre (118.0 versus 114.3 μm, p < 0.01). In a multiple logistic regression model, increasing retinal venular oxygen saturation associated with a negative structural treatment outcome (odds ratio 1.17 for each 1% increment after the loading phase, 95% confidence interval 1.01-1.36, p = 0.03). CONCLUSION: Changes in the retinal venular oxygen saturation associate independently with initial treatment response in nAMD, but functional and structural retinal measurements prior to treatment could not predict the treatment response.
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https://onlinelibrary.wiley.com/doi/full/10.1111/aos.13996
ae974a485f413a2113503eed53cd6c53
10.1111/aos.13996
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English Journal Articles (Peer Reviewed)

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