The finding raises the possibility that human retinas can be induced to regenerate, naturally repairing damage caused by degenerative retinal diseases and injury, researchers say.
Scientists have identified a chemical signal in the zebrafish brain that helps it regenerate retina, a finding that may help cure blindness in humans.
The discovery raises the possibility that human retinas can be induced to regenerate, naturally repairing damage caused by degenerative retinal diseases and injury, including age-related macular degeneration and retinitis pigmentosa, researchers said.
The prevailing belief has been that the regeneration process in fish retinas is triggered by secreted growth factors, but our results indicate that the neurotransmitter GABA might initiate the process instead, said James Patton, professor at Vanderbilt University in the US.
All the regeneration models assume that a retina must be seriously damaged before regeneration takes place, but our studies indicate that GABA can induce this process even in undamaged retinas, said Patton.
The discovery raises the possibility that human retinas can be induced to regenerate. (Shutterstock)
It turns out that the structure of the retinas of fish and mammals are basically the same.
Although the retina is very thin less than 0.5 millimetres thick it contains three layers of nerve cells: photoreceptors that detect the light, horizontal cells that integrate the signals from the photoreceptors and ganglion cells that receive the visual information and route it to the brain.
In addition, the retina contains a special type of adult stem cell, called Muller glia, that span all three layers and provide mechanical support and electrical insulation. In fish retinas, they also play a key role in regeneration.
When regeneration is triggered, the Muller glia dedifferentiate, begin proliferating, and then differentiate into replacements for the damaged nerve cells. Muller glia are also present in mammalian retinas, but do not regenerate.
Graduate student Mahesh Rao got the idea that GABA normally a fast-acting neurotransmitter best known for its role of calming nervous activity by inhibiting nerve transmission in the brain might be the trigger for retinal regeneration. He was inspired by the results of a study in the mouse hippocampus which found that GABA was controlling stem cell activity.
Read more
Working with Patton and assistant professor Dominic Didiano, Rao designed a series of experiments with zebrafish which determined that high concentrations of GABA in the retina keep the Miller glia quiescent and that they begin dedifferentiating and proliferating when GABA concentrations drop.
They tested their hypothesis in two ways: By blinding zebrafish and injecting them with drugs that stimulate GABA production and by injecting normal zebrafish with an enzyme that lowers the GABA levels in their eyes.
The research was published in the journal Stem Cell Reports.
Follow @htlifeandstyle for more.
Follow this link:
Fish eyes may hold key to cure blindness in humans, finds study - Hindustan Times
- Types of Blindness, Causes, and Their Treatment - Healthline - March 28th, 2025
- Types of blindness: Partial, total, congenital, and more - March 28th, 2025
- International collaborations helping understand the physical activity levels and well-being of children with visual impairment - Murdoch University - March 28th, 2025
- Revel in the Rainbow: Color-Blindness-Correcting Glasses Debut at Wooden Shoe Festival - Portland Monthly - March 28th, 2025
- Prevent Blindness Declares April as Women's Eye Health and Safety Month, Providing Free Educational Resources to the Public and Professionals - PR Web - March 28th, 2025
- Partial blindness hasn't stopped Oklahoma State's Stailee Heard from leading the Cowgirls into NCAAs - The Washington Post - March 28th, 2025
- Nine out of ten cases of blindness caused by glaucoma could be prevented through annual check-ups - Euro Weekly News - March 28th, 2025
- The silent sight thief: The devastating effects of glaucoma on mental health and quality of life - News24 - March 28th, 2025
- Rosie O'Donnell Celebrates Her 63rd Birthday After Move to Ireland as She Slams 'Willful Blindness' in Trump Administration - AOL - March 28th, 2025
- Partial blindness hasn't stopped Oklahoma State's Stailee Heard from leading the Cowgirls into NCAAs - Eagle-Tribune - March 28th, 2025
- The Longevity Wake-Up Call And The Blindness Of Leadership To It - Forbes - February 24th, 2025
- Album Review: Blindness // The Murder Capital - The Indiependent - February 24th, 2025
- The Murder Capital - Blindness - Northern Transmissions - February 24th, 2025
- The Murder Capital: Blindness review - independent pop | Indie - The Line of Best Fit - February 24th, 2025
- Prevent Blindness Kicks Off Second Annual "Retinopathy of Prematurity (ROP) Awareness Week," Feb. 24- March 2, 2025, as Part of its ROP... - February 24th, 2025
- Prevent Blindness Kicks Off Second Annual Retinopathy of Prematurity Awareness Week - Vision Monday - February 24th, 2025
- Gene therapy for rare childhood blindness shows lasting vision gains - R&D World - February 24th, 2025
- The Murder Capital's Blindness: A Voice of Significance in an Era Craving Authentic Discourse - Indie Is Not A Genre - February 24th, 2025
- Albums Of The Week: The Murder Capital | Blindness - Tinnitist - February 24th, 2025
- After Maine native testifies before Congress, Elon Musk targets his disability - Press Herald - February 24th, 2025
- Ozempic could BLIND you - it damages veins in the eye, major study finds - Daily Mail - February 24th, 2025
- Cerebral Venous Thrombosis Presenting With Binocular Blindness and Bilateral Sensorineural Hearing Loss - Cureus - February 24th, 2025
- Treatment for horses may lead to therapy for type of blindness - Mid Florida Newspapers - February 24th, 2025
- The Murder Capital: Blindness album review - Louder Than War - February 24th, 2025
- 'First in the world': London doctors cure blindness in children born with a genetic condition - WION - February 24th, 2025
- Doctors cure rare blindness in infants with gene therapy - NewsBytes - February 24th, 2025
- Gene therapy new trial treats rare blindness in children - Daily Jang - February 24th, 2025
- Ozempic Blindness Could Be Rare but Real: What Experts Say About the Risk - ZME Science - February 24th, 2025
- Parents of boy with rare eye condition hail amazing results of gene therapy - Yahoo News UK - February 24th, 2025
- Myths and Assumptions about Blindness - BBC.com - February 24th, 2025
- Man accused of beating victim, causing permanent blindness in one eye - KAIT - February 15th, 2025
- Scientists Find Link Between Weight Loss Drugs and Blindness - AOL - February 15th, 2025
- Treatment for horses may lead to therapy for type of blindness - University of Florida - February 15th, 2025
- How Ageism Impacts Adults with Low Vision - National Council on Aging - February 15th, 2025
- Ozempic and other weight loss drugs may be linked to conditions that could lead to blindness, study says - Quartz - February 15th, 2025
- Treatment for horses may lead to therapy for type of blindness - Phys.org - February 15th, 2025
- Treatment for Horses May Lead to Therapy for Type of Blindness - Morning Ag Clips - - February 15th, 2025
- Foundation Fighting Blindness Celebrates 20 Years of VisionWalk - PR Newswire - February 15th, 2025
- Woman Victim of 'Lash Blindness'Shock at How She Looks Without Them - Newsweek - February 15th, 2025
- Some Ozempic users are losing their vision - but scientists dont know why - The Independent - February 15th, 2025
- Those with visual impairments or blindness tackling the trails at Pico Mountain - WCAX - February 15th, 2025
- Prevent Blindness Issues Call for Nominations for the 2025 Jenny Pomeroy Award for Excellence in Vision and Public Health, and Rising Visionary Award... - February 15th, 2025
- Medical warning: Ozempic and Mounjaro may be linked to vision loss - India Today - February 15th, 2025
- New research links Ozempic to vision loss and risk of blindness - MSN - February 15th, 2025
- Ozempic Blindness: Weight Loss Drugs Linked to This Condition, Experts Warn - Tech Times - February 15th, 2025
- Ozempic Blindness Lawsuit Mounts: Shocking Side Effect Of Weight Loss Drug Is 'Eye Stroke,' What You Need To Know - IBTimes UK - February 15th, 2025
- The Politics Of Erasure: Gaza, Genocide, And The Wests Wilful Blindness OpEd - Eurasia Review - February 15th, 2025
- WHO launches new initiative to tackle the main cause of vision impairment - December 19th, 2024
- Blindness Advocates on Why There Should Be Audio Description Oscars - Variety - December 19th, 2024
- Diabetic retinopathy is treatable and preventable but only if you catch it in time - USA TODAY - December 19th, 2024
- AI: Could it help prevent blindness in diabetics? - BBC.com - December 19th, 2024
- Health Officials Investigate Rare Form of Blindness Tied to Ozempic - Gizmodo - December 19th, 2024
- Ozempic Could Be Blinding People Trying to Lose Weight - VICE - December 19th, 2024
- What is retinitis pigmentosathe vision disorder in the movie Blink? - National Geographic - December 19th, 2024
- VR shows promise in aiding navigation of people with blindness or low vision - Health Tech World - December 19th, 2024
- Ozempic could be linked to a common cause of sudden blindness, study finds - Quartz - December 19th, 2024
- New virtual realitytested system shows promise in aiding navigation of people with blindness or low vision - Tech Xplore - December 19th, 2024
- Ex-meth user who gouged her own eyeballs out while high says she is happier years after nightmarish episode - New York Post - December 19th, 2024
- Officials investigating link between Ozempic and eye-rotting disease that makes people blind - Daily Mail - December 19th, 2024
- Youngster to 'have eye removed' after minor fall - but NHS waitlist 'over 3 years' - NationalWorld - December 19th, 2024
- Restoring Vision: The Promise of Stem Cells in Healing Blindness - This is Local London - December 19th, 2024
- COAVS and Fred Hollows Foundation strengthen efforts to combat blindness in Pakistan - 24newshd - December 19th, 2024
- Study finds link between Ozempic and increased risk of vision loss - The Express Tribune - December 19th, 2024
- Going blind at 33 is devastating I wont see my childrens faces as they grow up - The Telegraph - December 19th, 2024
- Europol terror report reveals stark blindness about where the danger lies - Gript - December 19th, 2024
- Elton John lost his vision; signs and symptoms of eye infections that can cause blindness - The Times of India - December 6th, 2024
- Elton John's battle with blindness: How 77-year-old star's husband David Furnish guided him around premiere as - Daily Mail - December 6th, 2024
- Experimental study shows connection between COVID infection and age-related blindness - Medical Xpress - December 6th, 2024
- Elton John confirms shocking blindness after severe infection fight: I havent been able to see.. - Hindustan Times - December 6th, 2024
- Yes, an Eye Infection *Can* Lead To Vision Loss Heres How - Katie Couric Media - December 6th, 2024
- Elton John Battling Partial Blindness After Serious Eye Infection - Digital Music News - December 6th, 2024
- CU Anschutz researchers working to cure blindness through total eye transplantation - 9News.com KUSA - December 6th, 2024
- Elton John lost his vision from an eye infection. Here's why that might happenand how to prevent it - Fortune - December 6th, 2024
- Elton John announces blindness due to infection - CBS19.tv KYTX - December 6th, 2024
- David Frost: I suffer from face blindness. As a politician, being unable to identify people is agony - The Telegraph - December 6th, 2024
- Hes still standing how Elton John has survived far worse than blindness - The Telegraph - December 6th, 2024
- Foundation Fighting Blindness Partners with University of Colorado Anschutz Medical Campus and Other Leading Institutions to Secure Up to $46 Million... - December 6th, 2024
- Walmart helping low vison and blind customers shop with new app - KSLA - December 6th, 2024
- Elton John Says He Is Blind In The Right Eye Due to An Infection; What Is It All About? - Times Now - December 6th, 2024
- Trumps Win: The Blindness of Republicans and Democrats - The Times of Israel - December 6th, 2024