View clinical trials related to Geographic Atrophy.
Filter by:The purpose of this study is to characterize emixustat hydrochloride pharmacokinetic and pharmacodynamic parameters in subjects with geographic atrophy associated with dry age-related macular degeneration.
The purpose of this study was to compare the development of new geographic atrophy in patients with wet Age-related Macular Degeneration (AMD) when treated with either ranibizumab or aflibercept over 24 months. Geographic atrophy is an advanced form of AMD that can result in the progressive and irreversible loss of visual function over time.
Age-related macular degeneration (AMD) is the leading cause of irreversible blindness in industrial countries. In the late stages of the disease, neovascular changes or the development of geographic atrophy (GA) may induce severe visual loss. GA is characterized by the development of areas of outer retinal atrophy with continuous spread over time that is corresponded to an visual field defect for the patient. The pathogenesis is still incompletely understood. Despite the break-through in the treatment of neovascular AMD by intravitreally administrated vascular endothelial growths factor (VEGF) inhibitors, there is yet no treatment available to slow down or halt the disease process in GA. We and others have demonstrated that the total GA area progression shows large differences between patients. Potential factors influencing differential progression have been intensely studied: While neither systemic nor genetic factors have been shown to influence GA progression, ocular characteristics such as GA baseline size or phenotypic features of fundus autofluorescence (FAF) abnormalities have been identified as risk characteristics for increased GA progression. While these previous studies have mainly focused on the characterization of total GA area progression, topographic directional spread has not been analyzed and relevant predictive markers are yet unknown. There may be large differences in the local GA progression. The primary objective of this study is to identify specific characteristics, for the local GA progression. The knowledge of such risk factors may help to better understand the pathogenesis of GA. The identification of predictive markers will allow for better prognostic assessment of the individual disease process. The DSGA study is the extension trial of the FAM (Fundus Autofluorescence in Age-related Macular Degeneration) study (NCT00393692).
This study is intended to enable a possible transition to intramuscular (IM) or subcutaneous (SQ) administration for subsequent studies with GSK933776 by characterizing the safety, tolerability, PK and pharmacodynamic profiles, and immunogenicity of GSK933776 following IM and SQ administration in healthy volunteers. Such alternate routes of administration may provide more options in the selection of an efficacious dose for subsequent development in patients with geographic atrophy. There will be four treatment arms in the study and participants will be assigned to 1 of 4 possible treatment arms in a 1:1:1:1 ratio. The planned number of evaluable participants for this study is 24 with 6 participants completing all critical assessments in each of the four treatment arms. The total duration of participation from screening to follow-up for Treatment Arms A, B and D (single dose of GSK933776), will be approximately 113 days and total duration for Treatment Arm C (repeat dose of GSK933776) will be approximately 134 days.
Study to evaluate the safety and tolerability of MC-1101, a potential topical treatment for non-edxudative age Related Macular Degeneration (AMD) in medically stable individuals.
The objective of this study is to determine the repeatability and reproducibility of the Cirrus HD-OCT measurement of illumination areas under the retinal pigment epithelium (RPE).
The purpose of this study is to determine if emixustat hydrochloride (ACU-4429) reduces the rate of progression of geographic atrophy compared to placebo in subjects with dry age-related macular degeneration.
Geographic atrophy (GA) causes the loss of the retinal pigment epithelium (RPE) cells in broad areas of the retina. The application of subthreshold micropulse laser spots in healthy RPE in the vicinity of the area of GA may restore the imbalance in survival factors caused by the disease (ie, the laser may decrease vascular endothelial growth factor and RPE-derived transforming growth factor beta, upregulation of pigment epithelium-derived factor). This may slow or even stop the enlargement of atrophy secondary to GA, and therefore, avoid further vision loss.
This is a prospective, randomized study to evaluate the efficacy and safety of ORACEA® in the treatment of geographic atrophy due to dry age-related macular degeneration (AMD).
Age-related macular degeneration (AMD) is the most prevalent cause of vision loss in developed countries and is often discussed in terms of the "dry" and the "wet" forms. The "wet" form of AMD is the more advanced form of the disease and is responsible for 80% of the legal blindness in AMD. Treatment options include a promising class of biologics called anti-vascular endothelial growth factors, as well as photodynamic therapy and laser surgery. These therapies can slow further vision loss, but cannot achieve recovery of lost vision. The "wet" form of AMD is always preceded by the "dry" form. Therefore, it is reasonable to expect that the early detection and treatment of the "dry" form may help reduce vision loss or progression to the more damaging "wet" form. Unfortunately, symptoms appear only in advanced stages of the "dry" form. As light sensitive cells in the macula breakdown in a process called geographic atrophy, the patient may notice blurred central vision. OCT is an imaging technology that can perform non-contact cross-sectional imaging of retinal and choroidal tissue structure in real time. It is analogous to ultrasound B-mode imaging, except that OCT measures the intensity of reflected light rather than acoustical waves. This study aims is to use OCT technology to compare how the retinal anatomy and blood flow differ within three severity groupings of non-exudative age-related macular degeneration (NEAMD).