alexa Non-responders to bevacizumab (Avastin) therapy of choroidal neovascular lesions.
Bioinformatics & Systems Biology

Bioinformatics & Systems Biology

Journal of Glycomics & Lipidomics

Author(s): Lux A, Llacer H, Heussen FM, Joussen AM

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Abstract AIMS: To determine the characteristics of "non-responders" to intravitreal bevacizumab treatment in choroidal neovascularisation (CNV). METHODS: Forty-three patients with visual loss due to neovascular age-related macular disease (ARMD) (44 eyes) underwent intravitreal injections of 1.25 mg (0.05 ml) bevacizumab and were followed up every 4 weeks for 2, 3 or 6 months. Re-injection was performed when persistent leakage of the CNV was determined by fluorescein angiography and retinal oedema was assessed by optical coherence tomography (OCT). Non-responders were defined as those patients having reduced or stable visual acuity at the last follow-up. RESULTS: 45\% of the patients were non-responders. In this group the initial CNV size was significantly larger than in the responders. Initial reading ability was significantly lower in non-responders, but the initial foveal oedema was similar in both groups. Gains in mean visual acuity and reading ability were independent of lesion type. The proportion of non-responders to responders in the different lesion type groups was equally distributed. Only patients with the classic type of CNV seemed to respond better. CONCLUSIONS: In this study initial reasons for non-responders to intravitreal bevacizumab treatment in CNV are given. The efficiency of bevacizumab depends on initial lesion size and initial reading ability, but is independent of the amount of intraretinal and subretinal fluid. There was no general ineffectiveness of bevacizumab with any particular lesion type.
This article was published in Br J Ophthalmol and referenced in Journal of Glycomics & Lipidomics

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