Articles tagged with Retina
A team of biologists has found that glia, previously regarded as passive support cells, are crucial to nerve-cell development in the brain. The study reveals that fundamental questions about brain development can only be understood when accounting for glial contributions.
Researchers at Cedars-Sinai and NeuroVision LLC have developed an experimental optical imaging system that detects retinal beta-amyloid, a hallmark of Alzheimer's disease. The study found a 4.7-fold increase in retinal plaque burden in patients with Alzheimer's compared to controls.
Researchers developed a noninvasive eye scan to detect Alzheimer's disease years before symptoms appear, revealing amyloid-beta deposits and toxic proteins in the retina. The findings offer new hope for early detection and disease monitoring, with the potential to intervene and change the course of the disorder.
Researchers successfully regenerated functioning retinal cells in adult mice using the Ascl1 gene, a breakthrough that could lead to treatments for retinal damage caused by trauma, glaucoma, and other eye diseases. The discovery builds on previous research in zebrafish, which have a remarkable ability to regenerate damaged tissue.
Harvard Medical School researchers studied chicken embryos to understand the formation of high-acuity spot in the retina, which enables crisp daytime vision. They found that suppression of retinoic acid plays a crucial role in this process.
Researchers found long-term retinal injury and inflammation after blast exposure, even without detectable brain damage. The retina may serve as a sensitive indicator of low-level blast injury, helping identify individuals at risk of visual impairment.
Scientists at The University of Queensland discovered that dendrites in the retina's nerve cells play a critical role in decoding images. The study reveals that dendritic processing enables the retina to convert and refine visual cues into electrical signals.
Researchers discovered that direction-selective ganglion cells in the retina sense their owner's motion through space by detecting radial optical flow. This allows the brain to integrate information from visual and vestibular systems to sense rotation and maintain image stabilization.
The accumulation of advanced glycosylation end-products (AGEs) in the retina triggers oxidative stress, impairing defense mechanisms and leading to neuronal dysfunction. New therapeutic approaches targeting neurotrophic factors may offer potential for regenerative effects on retinal ganglion cells.
Researchers from Magdeburg University and The Chinese University of Hong Kong found that electrical stimulation can preserve visual neurons from cell death after injury, but it induces a fast disconnection of dendritic tree. This may protect the neurons from toxic excitation after brain damage.
Researchers found that impaired autophagy and lysosomal degradation lead to photoreceptor cell death in CLN5 deficient mice, mirroring human NCL diseases. The study suggests non-invasive retinal examinations could serve as biomarkers for neurological diseases.
A synthetic, soft tissue retina developed by an Oxford University student offers fresh hope to visually impaired people. The study uses biological, synthetic tissues and could transform the bionic implant industry and treat degenerative eye conditions like retinitis pigmentosa.
New cells in retina found to directly affect biological clock by sending signals to brain region regulating daily rhythms. Disruption of circadian rhythms linked to health issues like gastrointestinal and cardiovascular disorders, depression, and cancer.
A small study found that the new chemical composition of poppers is linked to retinal damage, with symptoms starting within hours or days of inhaling the substance. Most patients fully recovered after stopping drug use, but some experienced prolonged visual effects.
Researchers have created a pocket-sized retina camera that can take quality pictures without pupil dilation, enabling convenient and efficient retinal examinations. The camera is made from simple parts available online and costs around $185.
Researchers at Ruhr-University Bochum found that ischemic injury affects the extracellular matrix in the retina and optic nerve, leading to changes in protein composition. These changes can influence cell survival or death, contributing to eye diseases.
Researchers at the National Eye Institute used CRISPR to rescue photoreceptors in mice, preserving daylight and color vision. The approach could lead to novel therapies for preventing vision loss from human diseases such as retinitis pigmentosa.
A team of engineers developed a nanotechnology-based retinal prosthesis that mimics the retina's light-sensing cones to directly stimulate retinal cells. The device, powered wirelessly, has shown promising results in animal tests, bringing researchers closer to restoring functional vision in patients with severe retinal degeneration.
Scientists have identified GABA as a signal that triggers self-repair in fish retinas. They believe this could be the key to regenerating human retinas, naturally repairing damage caused by degenerative diseases. The researchers are now pursuing further studies with mice and zebrafish to confirm their findings.
Researchers discovered that decreased levels of neurotransmitter gamma-aminobutyric acid (GABA) trigger the retina to produce stem cells in zebrafish, shedding light on retinal regeneration. The finding informs efforts to restore vision in people who are blind and has implications for regenerative medicine.
Researchers uncovered the fovea's computational architecture and basic visual processing, distinct from other regions of the retina. This discovery helps explain differences in central and peripheral vision qualities.
Researchers at Northwestern University have identified a retinal cell that may cause myopia when it dysfunctions, and this dysfunction may be triggered by excessive indoor time. The discovery could lead to a new therapeutic target to control myopia.
Two groups of jumping spiders, Habronattus and Maratus, have evolved rare color vision to see reds, yellows and oranges. They use different mechanisms, with Habronattus employing a red filter and Maratus relying on ultraviolet, blue and green sensitive cells.
Researchers have developed a stem cell-based transplantation approach that restores vision in blind mice with end-stage retinal degeneration. The treatment strategy involved transplanting human iPSC-derived retinal tissue, which restored visual function in nearly half of the mice.
A new transplant technique has successfully restored vision in mice with inherited retinal degeneration. The technique uses 3D retinal sheets derived from mouse embryonic stem cells, which develop normal structure and connectivity, allowing the growth of functional photoreceptors that connect to host cells and send visual signals.
Researchers at the University of Rochester Medical Center have developed a new imaging technique that can distinguish individual retinal ganglion cells, which bear most of the responsibility for relaying visual information to the brain. This breakthrough could enable earlier diagnosis and treatment of eye diseases like glaucoma.
Research from the University of Southampton discovered that Alzheimer's disease proteins can accumulate in the retina and damage it, leading to Age-related Macular Degeneration (AMD). The study found that Amyloid beta proteins entered retinal cells within 24 hours and damaged the cell's structure.
Researchers at Columbia University Irving Medical Center have demonstrated that vision loss associated with retinitis pigmentosa can be slowed dramatically by reprogramming the metabolism of photoreceptors. The treatment aims to correct downstream metabolic aberrations, rather than the underlying genetic defect.
Researchers at the University of Manchester have identified two gene mutations that trigger a rare retinal disease causing blindness in males. These findings offer promising insights into the development of gene therapy and potential treatments for X-linked Retinoschisis, a genetic disease leading to macular degeneration.
A study by Drs. Sapieha and Mallette reveals a program of accelerated aging in the retina, leading to cellular senescence and production of factors that contribute to blinding disease. Interfering with this process using novel drugs improves blood vessel regeneration and reduces retinal damage.
A genetic mutation in whale eyes impairs their ability to see in bright light, making them more susceptible to fatal entanglements in fishing gear. This study may also provide insight into how vision works in other mammals, including humans.
Researchers from University of Eastern Finland discovered that retinal changes can be detected earlier than brain changes in CNS diseases. Functional abnormalities were found in three genetically engineered mouse models of human CNS diseases, suggesting eye examinations could be used as a noninvasive screening tool.
A University of Tsukuba-led research group has identified Pax6 as the protein regulator of retinal regeneration in newts. This discovery could lead to a new treatment approach for retinal problems, enabling the regeneration of damaged retinas.
Erika Eggers is studying retinal cell signaling's role in light adaptation and diabetic retinopathy, which may lead to the development of cell-based models for drug treatments. Researchers have found that neural activity in the retina changes before diabetic retinopathy sets in.
Researchers describe distinct stages of prion disease in the mouse retina and define a model to test therapeutic approaches. They found that misfolded prion protein accumulation and inflammatory responses occur at specific time points, allowing for potential therapy evaluation.
Researchers at UW Medicine have identified a new type of neuron in the mouse retina that defies traditional categorization. The GluMI cell, which resembles one type of neuron but functions like another, has been found to convey information within the retina.
A new study by the University of Leicester has identified details in fossil vertebrate eyes that shed light on how vertebrates evolved their complex eyes. The research shows that ancient species of hagfish could see, while living counterparts are blind, revealing a 'reverse evolution' process.
Researchers at Duke University developed a handheld device capable of capturing high-resolution images of infants' and toddlers' retinas. The device overcomes previous limitations in imaging the retina, allowing for detailed structural information about the eyes to be gathered.
Researchers are testing a new treatment using cells derived from umbilical cord tissue to target age-related macular degeneration. The therapy aims to prevent further loss of rod and cone cells and potentially restore vision in patients with advanced dry macular degeneration.
A study published in PNAS highlights two protective mechanisms compromised in macular degeneration. Drugs that target immune abnormalities and cholesterol levels may slow or prevent the condition, which affects 2 million Americans.
Researchers created a virtual tissue model of diabetes in the eye, predicting how a small protein causes vision loss and blindness. The study aims to develop new treatment methods for diabetic retinopathy, a leading cause of blindness worldwide.
Researchers have developed a new viral vector-based delivery system for retinal cells, aiming to treat visual impairments caused by age-related macular degeneration (AMD). The system uses highly photosensitive opsins to stimulate retinal cells and restore vision.
A Buck Institute study found that boosting a broccoli-related compound, palmitoleic acid, may be a possible treatment for age-related macular degeneration. The research identified indole-3-carbinol as a starting point and used a virtual screen to find a more potent activator of the aryl hydrocarbon receptor protein.
Researchers propose that cephalopods' U-shaped or dumbbell-shaped pupils can judge color by accentuating chromatic aberration, allowing them to focus on specific wavelengths. This unique visual system may enable camouflage and mimicry despite being 'colorblind'.
Researchers have discovered specific cell types and mechanisms responsible for orientation selectivity in the retina of zebrafish, shedding light on how we perceive and recognize visual stimuli. The study reveals that mutating a key protein called Teneurin-3 leads to a loss of orientation selectivity in neurons.
A pain medicine has been shown to preserve vision in a model of severe retinal degeneration by activating a receptor vital to a healthy retina. The drug (+)-pentazocine enables the survival of cone cells, allowing detailed color vision to remain intact.
A new study led by NIH researchers suggests that rod photoreceptors in mammals evolved from cone cells through a protein-mediated transformation, enabling nocturnal animals to thrive. The findings provide insights into the evolution of night vision and have potential applications for regenerating retinal cells.
A new study has found that the Zika virus is linked to a range of eye problems in Brazilian babies born with microcephaly. The researchers observed retinal lesions, hemorrhaging, and abnormal blood vessel development in three infants, which could result in severe visual impairment if left untreated.
A team of scientists from Queen's University Belfast is collaborating on a novel gene therapy approach to reverse diabetes-linked blood vessel damage to the retina. The research aims to prevent disease progression and restore visual function, addressing a global challenge affecting over 90 million people.
Scientists at MPFI have discovered a simple rule that explains how neural circuits combine information supplied by different types of cells in the retina to build a coherent representation of visual information. The discovery reveals that fine-scale retinal spatial information is preserved by OFF response regions, while ON response reg...
A new study reveals that nerve damage occurs before vessel damage in the retina due to diabetes, contradicting long-held beliefs. This finding has significant implications for treatment and prevention strategies.
Researchers found a previously unknown type of neuron called J-RGCs that signal color to the brain by comparing signals from ultraviolet cones and rods. This discovery may help explain why humans perceive the color blue in dim light, as proposed by Van Gogh's Starry Night painting.
Research found that overexpression of VEGF-A in animal models promotes both wet and dry age-related macular degeneration and cataract formation. The study identified the NRLP3 inflammasome as a key component in this process, suggesting a potential therapeutic target for preventing or inhibiting these diseases.
Researchers successfully designed and built a molecule that mimics the behavior of rhodopsin, a crucial protein in vision. This breakthrough could lead to new technologies by bypassing cell communication mechanisms.
Scientists create miniature retinal organoids that mimic the structure of real retinas, offering new perspectives on retina growth, injury, and repair. The protocol increases yield by up to 4-fold compared to previous methods, enabling researchers to study retinal disease mechanisms and develop therapies for age-related blindness.
RetroSense Therapeutics has successfully completed the first dose of its lead compound RST-001 in a phase I/II clinical trial for patients with retinitis pigmentosa. The study aims to assess the safety and potential efficacy of optogenetics in restoring vision.
Researchers at Penn Vet have found that retinal cells continue to differentiate and divide before overwhelming cell death causes degeneration, a common feature of inherited blindness diseases. This study suggests that this feature may be present across many forms of inherited blindness.
Researchers designed a contact lens that adjusts its focus using a bioinspired retina structure, inspired by the elephant nose fish's ability to spot predators. The lens is powered by a small solar cell and can capture images under low-light conditions, offering a potential solution for people with presbyopia.
A diet rich in grapes helps preserve retinal structure and function by countering oxidative stress. Grapes' natural components promote antioxidant activity, suggesting potential benefits for eye health and preventing age-related macular degeneration.
A protein critical to brain waste removal, TREM2, is diminished in age-related macular degeneration (AMD) and Alzheimer's disease. The research identified a key reason, microRNA-34a, leading to a new treatment target for both conditions.