{"id":3116,"date":"2015-11-06T23:27:07","date_gmt":"2015-11-07T05:27:07","guid":{"rendered":"https:\/\/irrf.org\/?p=3116"},"modified":"2022-07-19T10:14:00","modified_gmt":"2022-07-19T15:14:00","slug":"eye-site-offers-new-insight-on-age-related-macular-degeneration","status":"publish","type":"post","link":"https:\/\/irrf.org\/eye-site-offers-new-insight-on-age-related-macular-degeneration\/","title":{"rendered":"Eye site offers new insight on age-related macular degeneration"},"content":{"rendered":"
(Left) A comparison of optical coherence tomography (OCT) and histology on the same eye allows Project MACULA users to identify the cells on a microscope image (bottom) that are responsible for the hyper-reflective spots seen in the OCT (top, red, yellow), plus examine the contents of drusen, AMD\u2019s specific lesion (teal). \u201cFrom this kind of analysis, we\u2019ve learned that the retinal pigment epithelium is highly migratory in AMD,\u201d Curcio said. \u201cFinding out what these cells are doing is now a research priority, and with OCT, they can be observed in living people.\u201d<\/em><\/p>\n Over the past 14 years, Christine A. Curcio, Ph.D. (pictured at right), a professor in the UAB School of Medicine\u2019s Department of Ophthalmology, has collected images from hundreds of donor eyes in her search for the basic mechanisms underlying age-related macular degeneration. AMD is the leading cause of severe vision loss and legal blindness in Americans age 60 or older, affecting up to 15 million people in the United States today and almost 200 million people worldwide by 2020. As the population ages, those numbers will only increase. AMD occurs when the central portion of the retina, known as the macula, deteriorates. But the exact cause is unknown, and new treatments are desperately needed.<\/p>\n A few years ago, Curcio realized that the images and tissues she had collected, if properly annotated, classified, and made widely available, could prove invaluable to researchers and clinicians alike. It wasn\u2019t as easy as uploading the photos to Facebook. The process took four years, and along the way, Curcio and her team, particularly research associate Jeffrey Messinger, DC, had to develop new naming systems to achieve the level of precision they were after. But the result, an open-access website known as Project MACULA (Maculopathy Unveiled by Laminar Analysis), has been a resounding success, leading to several notable discoveries that have advanced understanding of the disease.<\/p>\n At the close of the 2000s, a high-powered new technology called optical coherence tomography (OCT) was becoming widely available to practicing ophthalmologists. It can provide detailed cross-sectional views of all the layers of the retina and the blood vessels behind it. OCT was so powerful, Curcio said, that clinicians \u201cwere now able to see the same structures\u201d as basic researchers with their tissue samples. Curcio recognized that high-quality, accurately annotated lab images of eyes with and without AMD could serve as an invaluable roadmap \u2014 helping clinicians interpret the patient images they were seeing with the new machines. \u201cAMD is a degenerative disease that is laid out in delicate tissue layers, and if you know the microscopic histology, it is possible to see almost all of it in OCT,\u201d Curcio said. Connecting the microscopic world with patient images from the clinic can lead to \u201cbetter diagnoses, more efficient clinical trials for new treatments and eventually better experimental model systems to test new ideas,\u201d she added.<\/p>\n With seed money from philanthropic foundations, and a subsequent grant from the National Eye Institute, Curcio started Project MACULA. Her team catalogued 142 donor eyes: 82 with AMD and 60 controls. Each was tagged with critical information \u2014 such as exact measurements of the thickness of each tissue layer, along with a glossary and references \u2014 and both laboratory and OCT images. The site officially launched in 2013.<\/p>\n In the process of systematically reviewing the histology, Curcio\u2019s team made major discoveries about the pathology of AMD \u2014 including a natural history of the principal lesions associated with the disease, known as drusen; the first major description of a new, drusen-like lesion, and the first comprehensive description of the neurodegeneration of AMD involving photoreceptors and the retinal pigment epithelium, which supports the photoreceptors. These findings have led to numerous peer-reviewed journal articles and invitations to major clinical meetings. \u201cLeading ophthalmologists want this information to develop guidelines for trials,\u201d for example, Curcio explains. \u201cThis is putting the right tools into the hands of the right workforce.\u201d<\/p>\nSHARING KNOWLEDGE<\/strong><\/h4>\n