Articles tagged with Optogenetics
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A newly discovered neural pathway connects the amygdala with arousal centers in mice, revealing a key mechanism for emotional regulation of sleep-wake cycles. This finding highlights potential therapeutic targets for stress-related insomnia and mood disorders.
Scientists developed a wireless device that uses light to send information directly to the brain, bypassing natural sensory pathways. The soft device delivers precise patterns of light through the bone to activate neurons across the cortex, allowing mice to learn and interpret meaningful signals.
Neural signals respond differently depending on time of day, with reduced activity at sunrise and enhanced at sunset. Blocking adenosine reveals a key regulator of cortical excitability across the day.
The superior colliculus, an ancestral brain structure, enables the brain to distinguish objects from the background and detect relevant stimuli in space. It generates centre–surround interactions independently, allowing for the detection of contrasts, edges, and salient features.
Researchers at Washington University in St. Louis have developed a new fiber-optic device, PRIME, which delivers multi-site, reconfigurable optical stimulation through a single implant. This technology enables manipulation of neural activity deep in the brain and holds promise for understanding complex brain circuits.
Researchers developed photo-inducible binary interaction tools (PhoBITs) to precisely control gene expression, cell signaling, and immune responses. PhoBITs enable targeted treatment with minimal side effects, opening new avenues for cancer therapy, immunotherapy, and regenerative medicine.
A study found that memories acquired while awake are stored in a more permanent form during REM sleep, requiring the reactivation of only three adult-born neurons involved in memory formation. This process is synchronized with theta rhythm activity and essential for proper memory function.
Cells on the intestinal surface are replaced every few days due to pulling forces that determine which cells are weakest and need to leave. Weakened cells are removed from the intestine due to disrupted tug-of-war behavior, leading to inflammation and disease.
Scientists have found that the ion channel GtACR1 can exist in two light-activated states, enabling quicker reopening and increased ionic conductivity. This discovery has significant implications for optogenetics, a method of controlling neuronal cells using light.
Researchers discovered a two-step mechanism where inhibitory neurons release nitric oxide to rapidly dilate blood vessels, followed by slower, localized vasodilation via astrocyte activation. This breakthrough sheds light on how neural signals are translated into blood volume changes in brain imaging.
Scientists have identified compounds that can help cells fend off viral infection by activating the integrated stress response pathway. These compounds show promise as broad-spectrum antivirals against multiple types of viruses and have been tested in human cells and a mouse model with positive results.
Researchers developed a novel optogenetic screening platform to control biological systems, unlocking new therapeutic opportunities. The platform enables precise and dynamic control of biological targets, resolving compound effects in real time.
Researchers at the Salk Institute have identified a brain circuit that gives physical pain its emotional tone, revealing a potential target for treating chronic and affective pain conditions. The study found that a group of neurons in the thalamus can mediate the emotional side of pain in mice.
Researchers have developed Shadow-Assisted Sidewall Emission (SASE), a novel method to create submicron linewidth light sources using normal UV photolithography. This breakthrough enables the fabrication of high-resolution light sources for various scientific and technological fields.
Researchers have identified the medial prefrontal cortex (mPFC) as the basis of emotional inference in animals and humans. In a study published in Nature, Xiaowei Gu and Joshua Johansen found that rats can learn inferred emotions by associating a neutral stimulus with an unpleasant experience.
A research team has uncovered a fundamental brain circuit that distinguishes between direct and vicarious fear, with the locus coeruleus playing a crucial role in processing fear. The study reveals a lateralized LC-NAergic system that separates personal from socially learned fear, shedding light on empathy and social learning.
Researchers at MIT successfully triggered a key enzyme in starfish egg cells using different patterns of light, prompting predictable movements and contractions. The study provides a new optical tool for controlling cell shape in its earliest developmental stages.
Researchers isolated precise location of memory overlap in cells using advanced imaging techniques in mice, showing that memories are stored in dendritic compartments. Linked memories consistently engaged the same groups of neurons and their dendritic branches.
Researchers have identified three cell types in the median raphe nucleus that control decisions on perseverance, exploration, and disengagement. These findings may help understand neuropsychiatric conditions such as OCD, autism, and major depressive disorder.
Researchers used optogenetic technology to manipulate cAMP oscillations and study transcription factor dynamics in Dictyostelium cells. Their findings suggest that periodic signal frequencies regulate gene expression via transcription factors, influencing cell fate determination.
Zebrafish have pineal gland photoreceptors that detect color using parapinopsin 1 (PP1) protein. Two genes, Sagb and Arr3a, play a crucial role in the inactivation of PP1 based on light intensity, with Sagb taking over at higher intensities.
Scientists have successfully used optogenetics to control seizure activity in living human brain tissue, opening doors to new treatments for epilepsy and other neurological diseases. By switching off specific neurons with light pulses, researchers can prevent seizures from occurring, providing a less invasive alternative to surgery.
A study from Tohoku University reveals that astrocytic manipulation affects the fate of long-term memory, with acidifying astrocytes preventing memories from being remembered and alkalinizing astrocytes preserving them. The findings suggest a parallel process of short-term and long-term memory formation.
University of Rochester researchers have refined a noninvasive method called BL-OG that harnesses light to activate neurons in the brain. The technique has the potential to transform invasive procedures used to treat Parkinson's disease and other neurological conditions by providing a safer, less invasive alternative.
Researchers at IBEC have created optogenetically generated leader cells that challenge the traditional notion of a single leader cell directing collective cell movement. Instead, each individual cell plays an active role in controlling its speed and acceleration, suggesting a force-velocity relation for collective migration.
Researchers led by Daniela Vallentin successfully rewired zebra finches' brains using optogenetics, expanding their vocal repertoire. The findings have implications for human aging and potential therapies for neurodegenerative diseases and learning impairments.
Researchers have found a new brain mechanism that detects prediction errors between expected and actual sensory inputs, boosting responses to unexpected information. This discovery could offer insights into the neural circuits underlying autism spectrum disorders (ASDs) and schizophrenia spectrum disorders (SSDs).
A study published in Science Advances reveals a special group of 'first responder' cells in the pancreas that trigger blood sugar response. These cells respond to glucose quicker than others, initiating the response and regulating the activity of other beta cells.
Researchers develop optogenetic system to precisely target cancer cells using light, inducing inflammatory cell death and triggering immune response. The approach aims to modulate the immune suppressive environment around cancer cells, helping T cells recognize and attack the disease.
Researchers have discovered a new class of light-sensitive proteins that can turn off brain cells with light, providing an unprecedentedly effective tool to study brain function. This breakthrough offers exciting opportunities for applying optogenetics to understand the underlying mechanisms of neurodegenerative and psychiatric disorders.
Researchers use light instead of electricity to stimulate muscle contraction, achieving more precise control and reduced fatigue in a study using mice. The optogenetic method could have broad clinical utility for people with paralysis or amputation.
A team of visionaries at the Carney Institute developed 3D-printed brain and spinal cord implants, revolutionizing surgical implantations and optical access. Bioluminescence imaging overcomes limitations of traditional fluorescent microscopy, providing unprecedented observation of neural and vascular activity.
Researchers have discovered that activating the locus coeruleus, a brain structure producing norepinephrine, improves visual sensitivity in non-human primates. The study used optogenetics to selectively boost LC activity, resulting in drastic enhancements in performance on a visual attention task.
A new study using electrophysiology and optogenetics has shown that neurons in the primary visual cortex respond to brightness illusions, settling a long-standing debate in neuroscience. The findings suggest that higher-level neurons play a crucial role in modulating activity in lower-level neurons.
Researchers discovered a class of cerebellar inputs, called climbing fibres, are essential for associative learning to occur. These
Scientists from Tokyo Medical and Dental University have created Opto-RANK, a light-activated form of RANK that can induce osteoclast differentiation. The treatment approach uses blue light activation to stimulate local bone resorption, making it a promising tool for treating abnormal calcification diseases and orthodontic issues.
Researchers have identified a network of neurons controlling right-left movements in the brain, which may help treat Parkinson's disease. The discovery provides insight into how essential movements are produced by the brain.
Researchers at Karolinska Institutet discovered that fibroblasts mediate erection by taking up noradrenaline, widening blood vessels, and increasing the number of cells in response to frequent erections. This knowledge may lead to new treatments for erectile dysfunction.
A KAIST research team has developed a technique called SynapShot, which allows for the real-time observation of synapse formation, extinction, and alterations. This breakthrough technique uses fluorescent proteins to track changes in synapses, offering new insights into brain function and potentially revolutionizing neurological research.
The UMass Amherst team has developed a first-of-its-kind dual-color optoelectronic neural probe, enabling bidirectional control of brain activity in specific cortical layers. This innovation holds promise for advancing our understanding of diseases such as epilepsy and Parkinson's disease.
Researchers have identified a previously unknown endogenous acid sensor in plant cells that responds to changes in pH levels. The acid sensor triggers the release of calcium ions from an endoplasmic reticulum, which activates cellular responses to external stimuli such as infections or drought.
Scientists have developed a way to regulate gene expression in organoids using optogenetics, enabling the observation of cell behavior and development patterns. This breakthrough allows for more accurate reproduction of tissue processes in the petri dish.
A Cornell University-led study has separated the role of the hippocampus in two functions of memory, which are crucial for associating time, place, and past experiences with future actions. The breakthrough has significant implications for treating memory and learning issues found in Alzheimer's disease and dementia.
Researchers have developed soft implantable fibers that can deliver light to major nerves through the body, allowing for precise illumination of nerve pain. The fibers are flexible and stretch with the body, enabling scientists to study peripheral nerve disorders in animal models without constraining movement.
Researchers at Sainsbury Wellcome Centre find frontal and parietal cortex play key role in encoding value of economic choices when faced with uncertainty. The study provides foundation for understanding neurobiology of risky decisions.
Researchers investigated the role of estrogen receptor beta-positive neurons in the medial amygdala, a region involved in social information processing. They found that MeA-ERβ+ neurons exhibit different roles for receptivity-based and sex-based preferences.
Fruit flies use a unique toggle-switch in their brains to switch between solo and mating songs, exchanging information through dialogue. Researchers decoded the tiny brains' behavior using neural imaging and AI, providing insights into complex brain decision-making.
Researchers found that brain circuits in 'deep-blind' zebrafish are fully functional and can drive normal visual behavior through direct stimulation. This study challenges the long-held assumption that neural development depends on visual experience.
Scientists at University of Cambridge create Highlighter tool that uses specific light conditions to activate defense mechanisms in plants, allowing them to 'talk' to humans about impending dangers such as disease outbreaks and heatwaves. The system utilizes optogenetics technology to control biomolecular processes at the cellular level.
A protein found in bacteria activates its enzymatic activity by up to 10,000 times when exposed to blue light, acting like an on-off switch. This discovery could lead to enhanced and optimized optogenetic tools and medical treatments.
Integrated Biosciences announces a drug discovery platform that enables precise control of the integrated stress response, a biological pathway activated by cells in response to various pathological conditions. The new platform uses optogenetic technique to study the ISR in live cells without physical or chemical damage.
Scientists found that cooling or warming the striatum region slows down or speeds up activity patterns, which correlates with rats' timing judgements. This provides evidence for the 'population clock hypothesis', suggesting that brains use decentralized and flexible sense of time.
MIT engineers have developed a new technology to probe the connections between the brain and gut, using fibers embedded with sensors and light sources. The researchers demonstrated that they can control neural circuits connecting the gut and brain in mice, inducing feelings of fullness or reward-seeking behavior.
Scientists at Karolinska Institutet have identified a group of nerve cells involved in creating negative emotional states and chronic stress. The neurons, which are sensitive to oestrogen levels, were mapped using advanced techniques such as Patch-seq, Neuropixels, and optogenetics.
New research suggests optogenetics could restore regular heart rhythm without shocks, improving prognosis and quality of life for AF patients. Light therapy has shown promising results in rats, indicating potential translatability to humans.
A unique microcircuit in fruit flies' visual system transforms a single type of neuronal input to compute direction selectivity, with no inhibitory neurons present. The discovery reveals a striking example of the multilayered mechanisms of inhibition and excitation in the brain.
A new study from University of Michigan suggests that the perception of not enough food can be sufficient to slow aging in flies. The researchers induced hunger in flies through various methods, including altering amino acid levels and using optogenetics, and found that these flies lived significantly longer than controls.
Osaka University researchers identified a specific group of cells in the nucleus accumbens that signal when mice have made a mistake. Blocking these cells' signaling impairs future decision-making, highlighting the importance of this brain pathway in learning from mistakes.
Researchers discovered that parvalbumin interneurons secrete substance P, driving slow vasodilation and increasing blood flow in the brain. This process allows for waste removal and prevention of neurological dysfunctions like dementia.
Researchers have pinpointed a new neurological target, the mesencephalic locomotor region, to improve walking recovery in people with spinal cord injuries. Electrical stimulation of this area has shown promise in animal models, and a clinical trial is underway.