via University College London
A pioneering new eye test, developed by scientists at UCL in collaboration with the Western Eye Hospital, London, may predict wet AMD, a leading cause of severe sight loss, three years before symptoms develop.
Researchers hope their test could be used to identify the disease early enough so that treatment can effectively prevent any vision loss.
The findings of the study, funded by Wellcome, are published today in Expert Review of Molecular Diagnostics.
Wet age-related macular degeneration (AMD), also known as macular disease, is the most common cause of permanent and severe sight loss in the UK.
Currently the diagnosis of wet AMD relies on a person developing symptoms, which then leads them to seek advice from a clinician. Initially, someone with wet AMD would notice distortion in their vision, normally interfering with their reading. Very quickly, this can progress to complete central vision loss, which may be extremely troubling to elderly patients who will fear blindness and loss of independence.
Wet AMD involves abnormal growth of blood vessels, which leak fluid into the retina. The introduction of new treatments has led to much improved results for patients, for a disease that over 20 years ago was regarded as untreatable. However, patient outcomes could be even better if treatment was started in the very earliest stages of the disease.
The test, called DARC (Detection of Apoptosing Retinal Cells), involves injecting into the bloodstream (via the arm) a fluorescent dye that attaches to retinal cells, and illuminates those that are undergoing stress or in the process of apoptosis, a form of programmed cell death. The damaged cells appear bright white when viewed in eye examinations – the more damaged cells detected, the higher the DARC count.
One challenge with evaluating eye diseases is that specialists often disagree when viewing the same scans, so the researchers have incorporated an AI algorithm into their method.
Using the same technology (test) the researchers had previously found that they can detect the earliest signs of glaucoma progression.* This new study, which forms part of the same ongoing clinical trial of DARC, assessed 19 of the study participants who had already shown signs of AMD, but not necessarily in both eyes. The AI was newly trained to detect the formation of leaking and new blood vessels, which corresponded with the spots that DARC picked up.
The new analysis found that DARC can uniquely highlight endothelial cells (which line our blood vessels) under stress in the retina. These stressed cells then predict future wet AMD activity with the formation of leaking and new blood vessels seen in patients three years later, using conventional eye scans with Optical Coherence Tomography (OCT).
The researchers say their test could be valuable in detecting new lesions in someone affected by AMD, often in the opposite, unaffected eye, and may eventually be useful for screening people over a certain age or with known risk factors.
Lead researcher Professor Francesca Cordeiro (UCL Institute of Ophthalmology, Imperial College London, and Western Eye Hospital Imperial College Healthcare NHS Trust) said: “Our results are very promising as they show DARC could be used as a biomarker for wet AMD when combined with the AI-aided algorithm.
“Our new test was able to predict new wet AMD lesions up to 36 months in advance of them occurring and that is huge – it means that DARC activity can guide a clinician into treating more intensively those patients who are at high risk of new lesions of wet AMD and also be used as a screening tool.”
The study team hope to continue their research with a clinical trial with more participants, and hope to investigate the test in other eye diseases as well.
Chief Executive of eye research charity Fight for Sight, Sherine Krause said: “Our Time to Focus report on the social and economic impact of sight loss stressed the importance of early detection for prevention of sight loss, and so this is a very encouraging development in tackling the leading cause of blindness.”
The Latest Updates from Bing News & Google News
Go deeper with Bing News on:
- Gemini Therapeutics Announces Presentation of Preclinical Data at 2021 Association for Research in Vision and Ophthalmology (ARVO) Annual Meetingon May 1, 2021 at 8:00 am
Gemini Therapeutics, Inc. (Nasdaq: GMTX), a clinical stage precision medicine company developing innovative treatments for genetically defined age-rel ...
- Outlook Therapeutics is bringing a treatment for retinal disease to the market at the right timeon April 29, 2021 at 8:53 am
Outlook Therapeutics is hoping to become the first and only company to commercialize an FDA-approved ophthalmic formulation of bevacizumab for use in wet AMD The market potential is significant: an ...
- Ocular Therapeutix™ To Present Pre-Clinical and Clinical Data at the 2021 Association for Research in Vision and Ophthalmology (ARVO) Annual Meetingon April 29, 2021 at 5:12 am
Ocular Therapeutix’s earlier stage development assets currently in Phase 1 clinical trials include OTX-TKI (axitinib intravitreal implant) for the treatment of wet AMD and other retinal diseases ...
- Ocular Therapeutix™ To Present Pre-Clinical and Clinical Data at the 2021 Association for Research in Vision and Ophthalmology (ARVO) Annual Meetingon April 29, 2021 at 5:01 am
Ocular Therapeutix, Inc. (NASDAQ:OCUL), a biopharmaceutical company focused on the formulation, development, and commercialization of innovative therapies for diseases and conditions of the eye, ...
- Wet AMD mobile sight-seeing service created in York and Bradfordon April 26, 2021 at 9:55 am
Wet Age-related Macular Degeneration (Wet AMD) causes people to lose their central vision. It is caused when abnormal blood vessels grow into the macular area and, without prompt treatment, blood or ...
Go deeper with Google Headlines on:
Go deeper with Bing News on:
AI-supported eye test
- AI and Its Future in Healthcareon April 4, 2021 at 8:31 pm
AI is advancing modern healthcare and has endless applications in the field. The latest AI supported advancements in the healthcare sector are: •Path AI : it is a machine learning technology in ...
- AI-supported test could lead to early detection of glaucoma progressionon March 18, 2021 at 1:20 pm
Loss of sight in glaucoma is caused by the death of cells in the retina, at the back of the eye. The test, called DARC (Detection of Apoptosing Retinal Cells), involves injecting into the ...
- Autonomous vehicles & systemson February 11, 2021 at 4:37 am
Self-organising logistics could reduce transportation kilometres (lowering costs and environmental impact). AI-supported traffic management could improve traffic safety, network efficiency and reduce ...
- Using AI to make healthcare more humanon December 7, 2020 at 8:43 pm
Meanwhile, there has been an explosion in the diversity of tests and diagnostics, which take time to review and leave doctors little time to actually speak to patients with eye-contact.
- Remote surveillanceon October 11, 2016 at 8:04 pm
Eagle Eye Networks, the globally renowned company in cloud video ... The two companies are working together to deliver AI-supported remote surveillance services, including business operations ...