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Geographic atrophy (GA), also known as atrophic age-related macular degeneration (AMD) or advanced dry AMD, is an advanced form of age-related macular degeneration that can result in the progressive and irreversible loss of retinal tissue (photoreceptors, retinal pigment epithelium, choriocapillaris) which can lead to a loss of central vision over time.
In advanced stages of AMD, atrophy of the RPE (geographic atrophy) and/or development of new blood vessels (neovascularization) result in the death of photoreceptors and central vision loss. [citation needed] In the dry (nonexudative) form, drusen accumulates between the retina and the choroid, causing atrophy and scarring to the retina. In the ...
Lampalizumab is an antigen-binding fragment of a humanized monoclonal antibody that binds to complement factor D; it was developed as a potential treatment of geographic atrophy (atrophy of the retinal cells, retinal pigment epithelium, and choriocapillaris) secondary to age-related macular degeneration.
Clinical trial number NCT02686658 for "Zimura in Participants With Geographic Atrophy Secondary to Dry Age-Related Macular Degeneration" at ClinicalTrials.gov Clinical trial number NCT04435366 for "A Phase 3 Safety and Efficacy Study of Intravitreal Administration of Zimura (Complement C5 Inhibitor)" at ClinicalTrials.gov
Pegcetacoplan is indicated to treat adults with paroxysmal nocturnal hemoglobinuria. [8] [9] [11] In February 2023, the indication was updated to include the treatment of people with geographic atrophy secondary to age-related macular degeneration.
The ability to give sight to a blind person via a bionic eye depends on the circumstances surrounding the loss of sight. For retinal prostheses, which are the most prevalent visual prosthetic under development (due to ease of access to the retina among other considerations), patients with vision loss due to degeneration of photoreceptors (retinitis pigmentosa, choroideremia, geographic atrophy ...
Dynamin-like 120 kDa protein, mitochondrial is a protein that in humans is encoded by the OPA1 gene. [5] [6] This protein regulates mitochondrial fusion and cristae structure in the inner mitochondrial membrane (IMM) and contributes to ATP synthesis and apoptosis, [7] [8] [9] and small, round mitochondria. [10]
Atrophy is the partial or complete wasting away of a part of the body. Causes of atrophy include mutations (which can destroy the gene to build up the organ), poor nourishment, poor circulation, loss of hormonal support, loss of nerve supply to the target organ, excessive amount of apoptosis of cells, and disuse or lack of exercise or disease intrinsic to the tissue itself.