Expired Study
This study is not currently recruiting Study Participants on ClinicalConnection.com. If you would like to find active studies please search for clinical trials.

Aurora, Colorado 80045


Purpose:

The purpose of this study is to explore the safety and efficacy of ranibizumab to treat non-arteritic ischemic optic neuropathy based on clinical and anatomical findings.


Study summary:

Nonarteritic anterior ischemic optic neuropathy (NAION) is the most common acute optic neuropathy in people older than 50 years. It is characterized by sudden partial loss of vision in one eye and has an increased risk of vision loss in the fellow eye. Although cause has not been determined, NAION is thought to occur following an idiopathic ischemic event involving the short posterior ciliary arteries that supply blood to the most anterior part of the optic nerve. A complete loss of vision is rare, but partial loss of visual field or acuity can result from NAION in the affected eye(s). Patients who have a 'disc at risk' or 'crowded disc' (small cup: disc ratio) are at increased risk for developing NAION. Other risk factors for NAION include age > 50 years and white race (estimated 95% of cases). Hypertension and diabetes also predispose to NAION development. Other factors that have been associated with NAION include high cholesterol, arteriosclerosis, stroke, cardiac and intraocular surgery, tobacco use, nocturnal hypotension, blood loss, glaucoma, elevated homocysteine and sleep apnea. The association between NAION and hypertension, high cholesterol and diabetes is stronger in individuals younger than 50 years than in older persons. Patients with NAION caused by ischemia leading to swelling of the optic nerve and rapidly progressing visual loss have had limited results with therapy such as corticosteroids, brimonidine, levodopa or surgery, such as optic nerve sheath decompression, in the past. Currently, there is no standard of care for these patients. Although the role of vascular endothelial growth factor (VEGF) in NAION has not been established, ischemic conditions may lead to VEGF production which could be the cause of edema and swelling. This possibility suggests that VEGF may be a target for therapeutic intervention by ranibizumab. Ranibizumab has demonstrated an effect on edema and vascular permeability. In animal studies it has shown a concentration- dependent effect of blunting the vascular permeability induced by VEGF. Of the more than 5,000 subjects with age-related macular degeneration in current and completed clinical trials, vascular permeability and edema have decreased with the use of ranibizumab.


Criteria:

Inclusion Criteria: - provide written informed consent - 21 years of age or older - new onset, within 14 days, of ischemia and vision loss - Best Corrected Visual Acuity (BCVA) 20/40 or worse Exclusion Criteria: - pregnancy or lactation - patients with proliferative diabetic retinopathy, diabetic macular edema, uveitis, history of ocular trauma, severe glaucoma, age-related macular degeneration - prior or concomitant treatment of oral steroids within 30 days, participation in any studies of investigational drugs within 30 days, participation in a ranibizumab clinical trial or prior treatment intravitreally or intravenously of Avastin or steroids.


NCT ID:

NCT00561834


Primary Contact:

Principal Investigator
Naresh Mandava, MD
Rocky Mountain Lions Eye Institute, University of Colorado Health Sciences Center


Backup Contact:

N/A


Location Contact:

Aurora, Colorado 80045
United States



There is no listed contact information for this specific location.

Site Status: N/A


Data Source: ClinicalTrials.gov

Date Processed: March 16, 2018

Modifications to this listing: Only selected fields are shown, please use the link below to view all information about this clinical trial.


Click to view Full Listing

This study is not currently recruiting Study Participants on ClinicalConnection.com. The form below is not enabled.