Articles tagged with Photoreceptors
The Nixon Visions Foundation has given a significant gift to support studies of the PRPH2 gene linked to macular dystrophy and boost stem cell research aimed at developing early diagnosis and a cure for this devastating genetic eye disease. Researchers hope to make a tremendous impact on people with this inherited eye disease.
Researchers developed a dish-based model that replicates the characteristics of dry age-related macular degeneration, allowing them to screen over 1,200 drugs for their ability to slow or halt disease progression. Two drugs, Aminocaproic acid and L745, showed promise in inhibiting key phenotypes associated with AMD.
Researchers have found that people with genetic risk factors for age-related macular degeneration (AMD) have thinner retinas and photoreceptors, even if they haven't yet lost their sight. This early detection could lead to earlier treatment and lifestyle changes to prevent vision loss.
A study led by LSU Health found how late-onset retinal degeneration develops and identified a surprising potential therapeutic, metformin. The research suggests that an enzyme called AMPK activates the protein CTRP5 to regulate fatty acid metabolism and energy stability.
The HyVIS project is a four-year European initiative that will develop bionic synapses for retinal prostheses, exploiting residual neuronal functionality to restore sensitivity to light. The approach involves plasmonic nanocannals and intelligent polymers to release neurotransmitters in response to light stimuli.
A new study reveals that non-mammalian vertebrates may have an efficient way of deciphering between color and greyscale information. Zebrafish were found to use four types of cone-photoreceptors, which respond to different wavelengths, to distinguish color in a simpler manner than humans.
A study by Umeå University researchers found that a specific light receptor, Opsin 3, plays a crucial role in brain development. The discovery may lead to new possibilities for using targeted light therapy during pregnancy to reduce the risk of neurological disorders in adulthood.
Researchers have discovered that the Usher syndrome type 1G protein SANS plays a crucial role in regulating splicing process, leading to errors in related genes and disease progression. The study aims to elucidate molecular basis of blindness in Usher syndrome patients.
A study published in Nature Communications found that the process removing old light sensors is disrupted in progressive blindness, leading to age-related macular degeneration. The researchers identified mTORC1 as a key component involved in photoreceptor recycling and suggest potential treatments using drugs against mTORC1.
Researchers have determined how peptides derived from PEDF protect neuronal cells in the retina layer, which could lead to treatments for degenerative retinal diseases such as age-related macular degeneration. The study found that these peptides work by binding to a protein receptor and processing omega-3 fatty acids like DHA.
The research team found that tenascin-C plays a crucial role in damaging vision cells following ischaemia. In mice without tenascin-C, retinal function improved after ischaemic damage, and fewer photoreceptors died.
Researchers discovered a unique UV-A-light-sensing system in flatworms, allowing them to coordinate movement and arousal. This finding may help illuminate the development and evolution of distinct light-sensing systems in single organisms.
A minimally invasive retinal reattachment procedure using pneumatic retinopexy leads to better long-term integrity of photoreceptors compared to more invasive procedures. This technique achieves superior visual outcomes by allowing the retina to reattach naturally and minimize damage to critical cells.
Researchers at UW-Madison have developed a micro-molded scaffolding photoreceptor patch to deliver new photoreceptors to damaged or diseased retinas. The 'ice cube tray' scaffold can hold three times as many cells while reducing biomaterial usage.
A computer model has been developed to potentially improve bionic eye technology by enhancing clarity and granting color vision to future retinal prosthetic devices. The model, which replicates the shapes and positions of millions of nerve cells in the eye, identifies ways to increase signal transmission and processing efficiency.
Researchers have developed improved gene vectors for ocular gene therapy, allowing for widespread delivery and reducing risks associated with traditional approaches. These vectors are being tested in clinical trials and have shown promise in restoring daylight vision in animal models of achromatopsia.
A new study reveals that the CLN3 gene mutation associated with Batten disease leads to degeneration of light-sensing photoreceptor cells in the retina. This understanding is crucial for developing new therapeutic strategies, including gene therapies and cell transplantation.
A University of Washington study identifies four main groups of photoreceptors, many of them new, that marine organisms use to detect and respond to light. This discovery could aid in the field of optogenetics and provide insights into how marine life responds to changing ocean conditions.
Researchers developed a gene therapy strategy to treat Leber congenital amaurosis by adding copies of the normal CRX gene under its native control mechanism. This approach restored some CRX protein function and drove expression of opsins in patient-derived retinal organoids.
Researchers at the University of Barcelona have identified a new function of the ataxin 3 gene, which causes Machado-Joseph disease, in the development of retina photoreceptors. This discovery provides insights into the molecular causes of rare diseases like ataxia and macular degeneration.
Researchers have discovered a new understanding of how fruit flies perceive color by examining the spectrum of light they can see. The study found that the green photoreceptor's light sensitivity shifted significantly, with its original range now better suited for seeing orange rather than green.
A team at University of Toronto Engineering has developed a method to inject healthy cells into damaged eyes, showing promise for treating forms of vision loss. Co-injection of retinal pigmented epithelium and photoreceptor cells improved vision acuity in mouse model, with restored activity in dark chambers.
A new study using optical tweezers reveals the sensitivity of photoreceptors to mechanical stimuli, opening up new questions on their function. The researchers detected specific molecules sensitive to mechanical stress and observed variations in electrical signals.
Researchers identified a critical early step in the visual process, discovering that rods and cones communicate primarily through connexin36 gap junctions. This understanding will aid in developing photoreceptor or retinal implants to restore vision.
Researchers at IIT have developed a revolutionary liquid retina prosthesis using nano-technology to replace damaged photoreceptors in the retina. The study demonstrates high spatial resolution and effectiveness, paving the way for future clinical trials.
Researchers discovered that looking at deep red light for three minutes a day can significantly improve declining eyesight in people over 40. The study found improvements in rod and cone sensitivity, with significant gains in color contrast sensitivity, particularly in the blue part of the spectrum.
A new study from Peter Reddien's Lab at Whitehead Institute has identified muscle cells that serve as guideposts to help regrow axons from the eyes to the brain in regenerative flatworms. The discovery sheds light on neural circuit regeneration in adults and could have implications for understanding human brain or nerve damage.
Researchers at UAB and SUNY-Buffalo found no retinal degeneration in mice with a K42E mutation of the DHDDS enzyme, but massive gliotic activation in their retinas. This challenges the conventional view of RP59 as a congenital disorder of glycosylation.
Scientists have developed a gene therapy approach that reactivates visual circuitry in human retinas using near-infrared light, potentially restoring vision in blind patients. The treatment was tested on human retinas kept alive in culture medium and showed promising results.
Zebrafish use single photoreceptors to spot tiny prey, similar to how humans might spot stars in the sky. This discovery provides insights into animal visual acuity and could lead to new understanding of human foveal vision.
A multi-disciplinary team has identified a protein called SARM1 as a potential therapeutic target for treating retinal degeneration. This discovery may provide a new approach to slowing the progression of blinding diseases such as AMD and retinitis pigmentosa.
Researchers at the National Eye Institute have discovered a tooth-enamel protein, amelotin, that is also present in eyes with dry age-related macular degeneration. The protein may play a role in the formation of calcium deposits in the eye and could be a therapeutic target for treating the blinding disease.
Researchers found a brain circuit that enables fruit flies to see in color, similar to the human capacity for color vision. The study sheds light on the transmission of information from the eye to the brain and could inspire future technologies for those with vision impairments.
Phytochromes can sense light intensity, duration, color, and day length by measuring the proportions of their inactive and active forms. Researchers have overcome a major hurdle to defining the transition between these states, allowing for atomic-resolution molecular movies of the process.
Researchers found that skin in mice expresses its own photoreceptors using neuroposin, synchronizing circadian clocks to light-dark cycles independently of eyes or brain. This discovery has implications for understanding skin physiology and potentially enhancing medical practice.
Researchers add archaeal DNA to mouse models' genes to assess resistance to retinal degeneration and potentially develop new methods to prevent incurable eye diseases. The goal is to understand how molecular chaperones can help avoid misfolded proteins that cause blindness.
A team of Australian scientists has created the world's most detailed gene map of the human retina, providing unprecedented insights into its genetic signals. This will help future research understand the factors that enable cells to function normally and identify the genetic 'mistakes' causing vision loss and blindness.
Researchers found that baby spiders have the same number of photoreceptors as adults but packed differently to fit in a smaller space. This allows them to maintain high visual acuity and distinguish objects at a distance, even when they're small.
Recent advances in preclinical research are being translated into innovative clinical solutions for blindness, including gene replacement and neuroprotective strategies. Gene editing strategies could potentially reverse vision loss, while early intervention during retinal degeneration is particularly promising.
Scientists discovered that microglia, a type of nervous system cell suspected to cause retinal damage, surprisingly had no damaging role during prion disease in mice. Microglia might delay disease progression, providing new insights into inherited photoreceptor degeneration diseases.
Researchers at the National Eye Institute have developed a new imaging method that uses fluorescent dye to track changes in the retinal pigment epithelium (RPE) layer. The technique reveals unique patterns in individual cells, providing insights into disease progression and treatment options.
Researchers at UC Berkeley have developed a therapy that can improve and prolong sight in those suffering from vision loss by dampening noise generated by nerve cells in the eye. The treatment has shown promising results in mice with a genetic condition, retinitis pigmentosa.
Researcher Jianhai Du finds that tumor cells hijack glucose metabolism to fuel cancer growth, while retina cells use it to renew photoreceptor membranes. MPC1 protein plays a critical role in regulating glucose uptake in both cell types.
A recent study by MIT researchers found that overactive DNA-repair enzymes can lead to cell death and severe tissue damage in photoreceptor cells, a condition that may be linked to retinal blindness. The enzyme Aag glycosylase plays a key role in this process, promoting an inflammatory response that produces toxic intermediates.
Researchers at the National Eye Institute have developed a patient-specific stem cell-based therapy that prevents blindness in animal models of geographic atrophy, a leading cause of vision loss among people age 65 and older. The therapy successfully integrates transplanted cells into the retina and restores photoreceptor health.
A new therapy has shown 'very promising' initial results in improving the sight of people with Leber congenital amaurosis type 10 (LCA10), a severe inherited retinal disease. The therapy, QR-110, was injected into one eye and left untreated in the other, resulting in improved vision and restored levels of normal CEP290 protein in cells.
The study reveals the molecular mechanisms of phytochromes, which convert light into cellular information, and their potential applications in oncology and genetic disease treatment. Understanding these proteins can help develop non-invasive imaging techniques and light-controlled tools for medical applications.
Researchers at UTHealth received grants to study the role of photoreceptors in sight and day/night vision. They aim to develop new therapeutic strategies for degenerative retinal diseases.
A new animal model of age-related macular degeneration has been developed, allowing researchers to study the environmental risk factors that promote the condition. The model replicates aspects of human AMD, including lipid accumulation and inflammation, which can lead to vision loss.
Researchers at the National Eye Institute combine adaptive optics and angiography to visualize live neurons, epithelial cells, and blood vessels in the retina. This technology could lead to earlier detection of diseases like age-related macular degeneration.
A multidisciplinary team of scientists from the University of Pennsylvania, Children's Hospital of Philadelphia, and University of Wisconsin-Madison are developing a stem cell-based approach to treat blindness in dogs. The researchers aim to generate specialized retinal cells using adult stem cells and transplant them into the retina.
A new study has found evidence that links dynamin-binding protein (DNMBP) to congenital bilateral cataracts and severe vision loss in infants and children. The researchers discovered mutations in the DNMBP gene on chromosome 10, indicating a recessive disorder common in inbred populations.
Researchers developed a handheld ophthalmology instrument with adaptive optics technology to image individual photoreceptors in the eye, improving diagnosis of eye diseases. The device can capture images of tiny photoreceptors close to the center of the retina, providing insights into brain-related diseases and trauma.
Duke University researchers have developed a handheld probe that can image individual photoreceptors in the eyes of infants, allowing for early detection of eye diseases and brain-related traumas. The new technology uses adaptive optics and is much smaller and faster than previous systems, making it ideal for imaging young children.
Blue light from digital devices and the sun transforms vital molecules in the eye's retina into cell killers, leading to age-related macular degeneration. A new therapy is being explored that uses a natural antioxidant called alpha tocopherol to slow down this process.
A new study found that Lutemax 2020 supplementation reduces photoreceptor damage caused by blue light exposure. The supplement's lutein and zeaxanthin isomers protect the eye by decreasing oxidative and endoplasmic reticulum stress.
A UCI researcher has received a $4.8 million CIRM grant to develop a stem cell-based retina therapy for treating retinitis pigmentosa and age-related macular degeneration. The therapy aims to transplant sheets of stem-cell derived retina into the back of the eye, potentially restoring vision.
A team of scientists developed a computer model that can predict the outcome of eye diseases by simulating retinal circuitry and measuring its effects. The study shows that a single element of the retinal circuitry can lead to a variety of effects, and the model accurately reproduces changes observed in experiments.
Researchers at Mass Eye and Ear found that microglial cells rapidly migrate into the injured retina, forming close connections with infiltrating immune cells and removing injured photoreceptors. This protective role of microglia may suggest a new therapeutic avenue for preserving photoreceptors after retinal detachment.
Researchers compared six adeno-associated viral (AAV) vectors for efficiency of gene transfer to both retinal pigment epithelial and photoreceptor cells. Human pluripotent stem cell-derived organoids were used as an in vitro test system for AAV vector development.