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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Miller, Neil R. Johnson, Mary A. Nolan, Theresa Guo, Yan Bernstein, Steven L. |
| Description | Country affiliation: United States Author Affiliation: Miller NR ( The Wilmer Eye Institute the Johns Hopkins Medical Institutions, Baltimore, Maryland, United States 2Department of Ophthalmology and Visual Sciences, the University of Maryland School of Medicine, Baltimore, Maryland, United States.); Johnson MA ( Department of Ophthalmology and Visual Sciences, the University of Maryland School of Medicine, Baltimore, Maryland, United States.); Nolan T ( Department of Veterinary Resources, the University of Maryland School of Medicine, Baltimore, Maryland, United States.); Guo Y ( Department of Ophthalmology and Visual Sciences, the University of Maryland School of Medicine, Baltimore, Maryland, United States.); Bernstein SL ( Department of Ophthalmology and Visual Sciences, the University of Maryland School of Medicine, Baltimore, Maryland, United States.) |
| Abstract | PURPOSE: Ranibizumab, a vascular endothelial growth factor-antagonist, is said to be neuroprotective when injected intravitreally in patients with nonarteritic anterior ischemic optic neuropathy (NAION). We evaluated the efficacy of a single intravitreal (IVT) injection of ranibizumab in a nonhuman primate model of NAION (pNAION). METHODS: We induced pNAION in one eye of four adult male rhesus monkeys using a laser-activated rose Bengal induction method. We then immediately injected the eye with either ranibizumab or normal saline (NS) intravitreally. We performed a clinical assessment, optical coherence tomography, electrophysiological testing, fundus photography, and fluorescein angiography in three of the animals (one animal developed significant retinal hemorrhages and, therefore, could not be analyzed completely) prior to induction, 1 day and 1, 2, and 4 weeks thereafter. Following the 4-week analysis of the first eye, we induced pNAION in the contralateral eye and then injected either ranibizumab or NS, whichever substance had not been injected in the first eye. We euthanized all animals 5 to 12 weeks after the final assessment of the second eye and performed both immunohistochemical and light and electron microscopic analyses of the retina and optic nerves of both eyes. RESULTS: A single IVT dose of ranibizumab administered immediately after induction of pNAION resulted in no significant reduction of clinical, electrophysiological, or histologic damage compared with vehicle-injected eyes. CONCLUSIONS: A single IVT dose of ranibizumab is not neuroprotective when administered immediately after induction of pNAION. |
| ISSN | 01460404 |
| e-ISSN | 15525783 |
| DOI | 10.1167/iovs.15-18015 |
| Journal | Investigative Opthalmology & Visual Science |
| Issue Number | 13 |
| Volume Number | 56 |
| Language | English |
| Publisher | Association for Research in Vision and Ophthalmology |
| Publisher Date | 2015-12-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Angiogenesis Inhibitors Pharmacology Evoked Potentials, Visual Drug Effects Optic Nerve Pathology Optic Neuropathy, Ischemic Ranibizumab Retina Administration & Dosage Animals Delayed-action Preparations Disease Models, Animal Electrophysiological Phenomena Fluorescein Angiography Intravitreal Injections Macaca Mulatta Neovascularization, Pathologic Retinal Ganglion Cells Rose Bengal Tomography, Optical Coherence Research Support, N.i.h., Extramural Discipline Ophthalmology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ophthalmology Sensory Systems Cellular and Molecular Neuroscience |
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