Articles tagged with Photoreceptors
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.
Researchers found that bipolar cells can grow new branches and reestablish selective connectivity with photoreceptors after an injury. This discovery provides hope for therapeutic strategies to replace lost photoreceptors and restore color vision in diseases such as age-related macular degeneration.
A team of researchers at UCSB has developed a retinal implant to replace support cells damaged by dry AMD. The phase 1/2A trial showed improvement in one patient's vision while maintaining the condition of others.
Researchers found that microglia in the retina can repopulate themselves and re-establish their normal organization and function after being nearly eliminated. The discovery could lead to new therapies for controlling inflammation and slowing progression of rare retinal diseases.
Researchers have discovered that brittle stars use thousands of light-sensitive cells in their skin to navigate complex environments. The team found these photoreceptors on the entire body surface and embedded them in the skin, challenging a long-held lens-based hypothesis.
A team of scientists has identified two proteins, PCH1 and PCHL, that regulate the activity of phytochrome B, a key photoreceptor protein in plants. This discovery allows plants to adapt their light sensitivity to different environmental conditions, enabling them to optimize photosynthesis and growth.
A $2.2 million grant will fund research into genetically controlled breaks in the external limiting membrane, which could lead to new prevention and treatment strategies for ESCS and other retinal diseases. The study aims to understand how these breaks contribute to disease progression.
Researchers found that primary cilia on cells of the retinal pigment epithelium are crucial for the survival of photoreceptors. The discovery has advanced efforts to create stem cell-derived RPE cells for transplantation into patients with geographic atrophy, a leading cause of blindness in the US.
Researchers identified a crucial part of the photoreceptor responsible for light-dependent gene expression in Arabidopsis thaliana. This finding has significant implications for agriculture, enabling the development of crops that can thrive in diverse environments with increased crop density.
A LSU Health New Orleans study found that DHA in fish oil 'preconditions' photoreceptor and RPE cells to survive future insults, reducing the risk of retinal degeneration. The researchers also discovered that daily omega-3 supplementation may provide an opportunity for halting debilitating eye diseases.
Researchers from Hadassah-Hebrew University Medical Center and Bascom Palmer Eye Institute conducted two clinical trials using human embryonic stem cells to treat dry macular degeneration, a leading cause of new blindness. The studies showed that stem cell injection into the eye replaced damaged cells and improved vision in some patients.
Researchers used gene therapy to express melanopsin in mouse retinas, restoring visual function and improving pupil constriction. The treatment was effective for up to 15 months, showing enhanced visual responses and light avoidance behaviors.
Researchers have shown that gene therapy can reprogram cells at the back of the eye to become light sensitive, potentially reversing blindness. In a study, mice blind from retinitis pigmentosa regained vision and recognized objects in their environment after receiving melanopsin gene therapy.
Scientists have identified a gene that causes blindness in middle age, shedding light on a devastating genetic condition. The study found changes in the RPGR gene damage eye cells and lead to X-linked retinitis pigmentosa, affecting night and peripheral vision before causing complete blindness.
Scientists discovered that insects can see in far greater detail than previously thought due to the rapid movement of photoreceptor cells, allowing them to resolve small objects at high speeds. This challenges long-held assumptions about insect vision and has implications for improving robotic sensors.
New research shows that injured mouse eyes can regenerate neurons, integrating them into the eye's circuitry. The study uses a zebrafish clue to discover cues that reprogram Müller glia into retinal neurons, opening new approaches for treating eye trauma and retinal disease.
Fan worms have developed unusual compound eyes on their tentacles to detect motion and predators, alerting them to danger. The eyes' unique genetic makeup reveals an independent evolutionary history from other visual systems.
Researchers at LSU Health Sciences Center have discovered a new class of biochemical triggers called elovanoids, which are derived from omega-3 fatty acids. These molecules play a significant role in protecting retinal pigment epithelial and photoreceptor cells from damage.
Researchers have developed a novel photoswitch that restores visual function in blind mice by activating retinal neurons. The light-sensitive molecule, DAD, targets bipolar cells, offering advantages over previous approaches. This breakthrough provides a promising alternative for treating vision loss.
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.
Stem cell therapies aim to restore function in degenerative conditions, but ensuring cell survival is a major hurdle. Researchers successfully restored long-term vision in blind mice by transplanting photoreceptors derived from human stem cells and suppressing the immune response that rejects transplanted 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 Krembil Research Institute have published a paper that challenges the prevailing view of vision recovery after retinal cell transplantation. They found that transplanted photoreceptor cells do not enter the recipient retina, contrary to previous interpretations.
Researchers found that Phospholipase D (PLD) plays a central role in coupling endocytosis with membrane recycling in light-sensitive cells. Without PLD activity, the retina gradually degenerates and mutant flies go blind.
A new type of photoreceptor, LITE-1, has been discovered that is 50 times more efficient at capturing light than the rhodopsin in the human eye. This receptor protein was found among a family of taste receptors in invertebrates and has unusual characteristics suggesting potential future applications.
Researchers found that plant roots can detect light through vascular bundles, activating photoreceptors and influencing root architecture. This discovery reveals a new sensory modality for roots, potentially enhancing plant performance in natural environments.
Researchers have uncovered the mechanism by which cryptochrome 2, a key photoreceptor, is switched on and off in plants. This desensitization mechanism allows plants to maintain homeostasis of their blue light responsiveness in fluctuating light environments.
A new imaging method has captured the daily disposal and regeneration of photoreceptor cells in a living human eye, revealing crucial insights into blinding diseases such as age-related macular degeneration and retinitis pigmentosa. The study's findings have the potential to improve our understanding of vision and eye health.
Researchers will investigate molecular and genetic factors guiding axon growth in the retina, with goals of restoring vision through neuronal regeneration. The projects aim to develop breakthrough therapies for blinding diseases such as age-related macular degeneration and glaucoma.
Scientists have discovered a mechanism of intercellular communication that helps explain how biological systems function properly. The findings shed light on the poorly-understood interaction between cells and suggest that cancer cells' poor communication contributes to their biologic damage.
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.
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 at Stanford University School of Medicine have successfully restored multiple key aspects of vision in mice by coaxing severed optic-nerve cables to regenerate and re-establish connections with the brain. This breakthrough could potentially lead to future work on restoring vision in blind people.
Researchers at Hiroshima University discovered a new role for the gene Rab6 in cell polarity, which directs proteins to specific sides of cells. The study found that Rab6 distinguishes between proteins destined for different parts of the cell, shedding light on how cells maintain their orientation.
Scientists have detected internal movements in LOV photoreceptors using neutron spectroscopy, which can control biological processes with light. The study highlights the potential of neutron scattering experiments for analyzing cellular processes and provides unique insights into protein functionality.
A study published in Nature Medicine found that fuel-starved light receptors contribute to the development of age-related macular degeneration. The researchers discovered that photoreceptors need lipids, not just glucose, to function properly and that blocking a specific receptor can prevent abnormal vessel growth.
Researchers found that photoreceptors use both glucose and lipids as fuel substrates, debunking previous scientific beliefs about the cause of abnormal blood vessel growth leading to blindness. This discovery opens new therapeutic avenues for retinal diseases such as AMD.
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.
Researchers discovered the organic cation transporter CarT is necessary for maintaining histamine levels in fruit fly brains, ensuring normal vision. Disrupting this process led to impaired vision and behavioral abnormalities in flies.
Researchers identify and map a light-sensing protein that uses vitamin B12 to regulate gene expression in response to light exposure. The discovery expands the biological role of vitamin B12 and offers insights into novel modes of gene regulation.
A team of researchers at Penn Vet has identified a form of congenital night blindness in dogs, which shares similarities with human forms of the condition. The discovery may lead to the development of gene therapy to correct the dysfunction in both humans and dogs.
A new study on mice reveals how motion-sensing cells in the eye form synapses with interneurons, creating a unique delay that allows for accurate tracking of small moving objects. This delay enables the object motion sensors to distinguish between the motion of an object and its background.
Researchers at Mass Eye and Ear discovered that the alternative complement pathway exacerbates photoreceptor cell death after injury, but blocking it can protect photoreceptors. Inhibition of this pathway offers a new therapeutic target to prevent initial photoreceptor loss.
Researchers found that DRAM2 gene mutations lead to loss of central vision and peripheral vision loss in older individuals, likely due to reduced autophagy and photoreceptor renewal. The discovery sheds new light on the condition and highlights the importance of collaboration between institutions.
A new study from the University of Cambridge has identified a 500-million-year-old fossil brain that helped determine the origin of heads in early animals. The research found connections between the hard plate and eye-like features at the front of the body, indicating a common evolutionary transition from soft to hard bodies.
Researchers have developed a novel optogenetic protein, Opto-mGluR6, which can be tailored to bring this promising technology closer to medical application. This breakthrough could potentially restore sight in patients suffering from any kind of photoreceptor degeneration, including severe forms of age-related macular degeneration.
Gene therapy for Leber congenital amaurosis improves vision and retina sensitivity within weeks of treatment, with peak benefits after one to three years. However, these gains diminish over six years, revealing the need for further research to sustain restored vision.
A new study demonstrates that gene therapy for Leber congenital amaurosis (LCA) improves vision in patients within weeks of treatment, with benefits peaking at one to three years after treatment. However, the visual gain eventually declines, highlighting the need for future therapeutic strategies to sustain restored vision.
Researchers found that neurons produce a chemical critical for blood vessel survival, which also supports photoreceptors. The study suggests a new way to understand and treat diseases like diabetic retinopathy and age-related macular degeneration.
Researchers discovered a feedback signalling mechanism responsible for changes in nerve cells exposed to prolonged light, which may help protect neurons from degeneration. The study provides insight into synaptic plasticity and potential therapeutic applications for neurodegenerative diseases.
Researchers at LSU Health New Orleans have identified a protein in the retina crucial for vision, which can be harnessed to prevent and slow down retinal degenerative diseases. The discovery offers new hope for treating blindness and visual impairments.
Researchers at the Technion have confirmed the biological purpose for the seemingly counterintuitive setup of photoreceptors and neurons in the human eye. The retina is optimized for vision purposes, with Müller glia cells concentrating light into photoreceptors.
Researchers at LSU Health New Orleans have discovered Neuroprotectin D1, a molecule that protects cells from damage and promotes recovery from stroke. This breakthrough could lead to therapeutic solutions for age-related macular degeneration and ischemic stroke.
A new study published in Proceedings of the National Academy of Sciences has found microscopic spheres of calcium phosphate in eyes with age-related macular degeneration (AMD), a leading cause of blindness. The discovery opens up new avenues for diagnosis and treatment, potentially allowing early detection and prevention of the disease.
An international research team identified a critical gene linked to childhood blindness and vision loss. The study reveals that mutations in this gene affect phospholipid metabolism, leading to photoreceptor death and vision impairment.
Researchers at IRCM uncover the essential role of a protein called Numb in maintaining proper compartmentalization within photoreceptor cells, leading to vision loss and degenerative diseases like retinitis pigmentosa. The discovery could provide novel drug targets for preventing photoreceptor degeneration.
A new study published in The Lancet reports the first evidence of medium-term to long-term safety and tolerability of human embryonic stem cell transplants in humans. hESCs restored sight in more than half of patients with severe vision loss, and no safety concerns were detected after up to 3 years post-transplant.
A study by Professor Takashi Yoshimura and colleagues identified a deep brain photoreceptor in Japanese quails that directly responds to light, controlling seasonal breeding activities. The receptor, called cerebrospinal fluid-contacting neurons, also plays a role in detecting the arrival of spring.
Researchers discovered mantis shrimp have optics generating ultraviolet color vision using mycosporine-like amino acids as built-in biological sunscreen filters. The complex eyes detect polarized colors and navigate through the reef without processing visual information in the brain.