Articles tagged with Astrocytes
Researchers have identified a cellular mechanism that detects when the brain needs an extra energy boost to support its activity. This discovery could lead to new therapies for maintaining brain health and longevity by targeting impaired brain energy metabolism, a process accelerated in ageing and neurodegenerative diseases.
Researchers found that increasing astrocytic mGluR3 levels enhanced memory in older females, while reducing these levels impaired memory in young females. In males, reducing mGluR3 enhanced memory, and increasing the receptor had no effects.
Researchers developed a novel light-sensitive drug that enhances extracellular adenosine activity, inducing sleep artificially without genetic modification. The drug overcomes issues with conventional photosensitive drugs, showcasing optochemistry's potential in targeting A2A receptors and regulating brain function.
Astrocyte activity starts approximately 20 seconds before epileptic neuronal hyperactivity, suggesting their role in triggering seizures. Researchers found that blocking metabolic activity of astrocytes reduces the magnitude of epileptic neuronal hyperactivity.
Researchers at University of Pittsburgh are developing a platform to genetically modify glia cells using bioengineering modified RNAs. The goal is to increase or decrease disease-relevant genes in astrocytes or microglia to potentially treat Alzheimer's disease and other neurodegenerative disorders.
Researchers at Brigham and Women's Hospital discovered that astrocytes, non-immune cells, can develop aspects of immune memory. This epigenetic memory promotes CNS pathology in autoimmune inflammation, including chronic neurologic disorders like multiple sclerosis.
UCLA Health researchers found a group of astrocytes in the central striatum regulate neurotransmitter communication and gate perseverative behavior. The discovery may lead to potential therapies for disorders like autism, OCD, and Tourette syndrome.
Researchers at Salk Institute have created a novel organoid model of the human brain that includes mature, functional astrocytes. This allows for the study of inflammation and stress in aging and diseases like Alzheimer's with greater clarity, revealing a relationship between astrocyte dysfunction and inflammation.
Astrocytes in the habenula region of the brain play a crucial role in regulating anxiety. The study found that artificial alkalization of these cells reduces theta band neuronal activity, while optogenetic alkalization increases it. This suggests that astrocytes tune into the 'marble blues' to control anxiety responses.
Researchers found that APOE4 accumulates on fat droplets in astrocytes, damaging brain cells and preventing them from cleaning up toxic lipids. This mechanism could explain why APOE4 increases Alzheimer's disease risk.
Researchers developed a new imaging technique to visualize the tumor microenvironment of glioblastoma, revealing insights into its pathology. The technique uses PET imaging with Carbon-11 acetate, tracking reactive astrocytes and distinguishing them from tumor cells.
Researchers at Helmholtz Munich have identified a new source of stem cells in the brains of patients with brain injuries, which could lead to improved treatments for neurological disorders. The discovery involves specific astrocyte cells that exhibit properties of neural stem cells and can be regulated by a protein called Galectin 3.
Small cell lung cancers metastasize to the brain by convincing astrocytes they are baby neurons in need of protection. Blocking this signal may slow or stop brain metastasis growth, according to a Stanford Medicine study.
Scientists at Temple University's Alzheimer's Center have identified a promising new therapeutic target for Alzheimer's disease: the protein ABCA7. The study found that cholesterol depletion and inflammation suppress ABCA7 levels in human brain cells, potentially contributing to disease onset.
Researchers at the University of Lausanne have discovered a new kind of cell that combines characteristics of neurons and glial cells, specifically astrocytes. These hybrid cells express molecular machinery necessary for synaptic transmission, releasing glutamate to modulate neuronal activity.
A groundbreaking review paper reveals the importance of GABA tone, the amount of GABA that regulates continuous signaling in the brain. The study identifies key mechanisms and functions, including astrocytes' role in regulating GABA tone and its impact on cognitive processes.
Researchers have identified a cluster of neurons in the hypothalamus called GABRA5 that regulates energy expenditure. Astrocytes control this cluster, producing tonic GABA that inhibits it, leading to weight gain.
A recent study found that activating astrocytes in the basal forebrain can keep mice awake for hours without affecting their sleep need or intensity. The researchers hope to develop interventions targeting these cells to improve productivity and health of shift workers and others who work long hours.
A KAIST research team has identified excessive astrocyte-mediated synapse removal as the cause of mental diseases induced by childhood abuse trauma. This mechanism is linked to stress hormones and can lead to abnormal neural networks and complex behavioral abnormalities.
Using a sensitive mass spectrometry-based secretome approach, researchers have identified hundreds of molecules that are cleaved from the cell surface of astrocytes, providing a unique database of MMP-2/-9 substrates specific to blood-brain barrier formation and maintenance. This discovery sheds light on the molecular processes essenti...
Researchers found that young and healthy human glial progenitor cells can outcompete older and diseased cells in the adult brain, replacing them with healthier ones. This breakthrough has strong therapeutic implications for treating neurological disorders like Huntington's disease.
Researchers discovered that astrocytes process serotonin to regulate olfactory sensation. The study found that serotonin triggers changes in gene expression patterns, turning astrocytes into hubs of olfactory processing.
Researchers created a detailed 3D image of the synapse, a key juncture in neuronal communication. The model reveals the precise geometry of interactions between individual cells, which may hold the key to understanding neurodegenerative diseases.
Researchers have developed an effective treatment that accelerates recovery after stroke by modulating astrocyte reactivity and cortical connectivity. The treatment, which involves administering a molecule called C3a in nasal drops, has shown positive results in mice with stroke, offering new hope for faster and better recovery.
Researchers have found that stimulating a specific bile acid receptor, FXR, may help prevent retinopathy of prematurity in premature babies. By targeting this receptor, the study aims to develop earlier and more effective treatments to protect their vision.
Researchers found that a combination of amyloid burden and blood markers of abnormal astrocyte activation can predict Alzheimer's disease progression. Testing for these biomarkers may help identify patients at risk, enabling earlier diagnosis and treatment.
Researchers at Baylor College of Medicine found that neuronal activity is necessary and sufficient for astrocyte development into a bushy-shaped cell. The team discovered that neurons produce GABA, which binds to astrocytes via the GABA B receptor, promoting their maturation.
A preclinical study suggests that abnormal immune activity in astrocytes is sufficient to cause cognitive deficits in dementia. Astrocytes produce excessive immune messengers, activating neurons and leading to hyperactivity.
Researchers found that exercise releases chemical signals that promote neuronal development in the hippocampus, a crucial area for learning and memory. Astrocytes play a critical role in mediating the effects of exercise on brain health, helping to regulate neuronal activity and prevent hyperexcitability.
Researchers developed a new imaging technique that visualizes the interaction between reactive astrocytes and neurons in the brain, revealing a potential breakthrough in Alzheimer's disease diagnosis and treatment. The study found that acetate promotes reactive astrogliosis, leading to dementia, and offers a new target for AD treatment.
Researchers at UCLA Health discovered that astrocytes, traditionally considered the brain's support system, are involved in obsessive-compulsive disorder-related behaviors. The study suggests that targeting both neurons and astrocytes may be effective for OCD treatment.
Astrocytes tune down overactive neurons during acute stress, helping to regulate attention and perception. This discovery provides new hope for treating attention disorders like ADHD.
Research suggests astrocytes integrate external sensory inputs with internal states to modify calcium signaling towards neurons. This process could be crucial for behavioral responses and memory formation.
Researchers have created wearable microscopes to produce high-definition, real-time images of mouse spinal cord activity across previously inaccessible regions. This technology enables unprecedented insight into the neural basis of sensations and movement in healthy and disease contexts.
A new platform allows researchers to study cell-cell interactions in inflammatory neurological diseases like multiple sclerosis (MS). By identifying genes that control biologic processes, the team hopes to develop therapeutics to change disease-promoting cell behavior.
Researchers found that astrocyte cells directly impact motor learning by maintaining an optimal molecular balance. Astrocytes' ability to regulate neurotransmitter glutamate affects the smoothness of movement and refinement of technique.
Researchers at Tohoku University found that astrocytes exhibit a stronger acid response during REM sleep in epileptic mice, which may drive specific information processing and generating plasticity. This discovery could lead to the development of a biomarker for epilepsy severity and potentially inform therapeutic strategies.
Researchers from UCL Cancer Institute found that head injuries may contribute to the development of gliomas, a type of aggressive brain tumour. Studies in mice and human populations suggest that genetic mutations acting with inflammation can change cell behavior, increasing cancer risk.
Researchers found that gene therapy approach and small molecule treatment can calm the destructive cells of ALS by preserving upper motor neurons. Improving mitochondrial health also reduces astrocyte attack on diseased neurons, offering new hope for treating ALS.
Researchers found that social isolation triggers astrocyte-mediated deficits in learning and memory due to hyperactive astrocytes suppressing brain circuit function. Inhibiting astrocyte hyperactivity reversed cognitive deficits, suggesting a new role for astrocytes in brain physiology.
A new biomarker, GFAP, has been identified that can predict both current and future progression of multiple sclerosis. Elevated blood levels of GFAP indicate chronic disease processes involving astrocytes, which contribute to gradual progressive disability.
Researchers found that klotho has anti-inflammatory and neuroprotective effects on cultured glial cells, reversing increased secretion of pro-inflammatory cytokines. The study supports klotho's therapeutic potential in pathological processes with a neuroinflammatory component.
Researchers found a link between astrocytes from schizophrenic patients and reduced vascularization in the brain, which may contribute to the disease's metabolic flux. The study suggests that astrocytes could be a target for novel therapies to address schizophrenia.
A new study reveals that astroglial cells, a type of glial cell, are essential for the integration of sensory information from a location, enabling spatial learning and memory. This mechanism involves the release of D-serine, which strengthens dendritic spikes, facilitating the recognition and storage of familiar places.
Researchers at UT Health San Antonio identified a new inflammatory trigger in Alzheimer's disease and progressive supranuclear palsy, involving 'jumping genes' that form double-stranded RNA mimicking viral infections. This discovery opens new doors for understanding astrocyte biology and their role in transposable element control.
A team from Brigham and Women's Hospital developed FIND-seq, a method that isolates and analyzes rare astrocytes driving MS inflammation and neurodegeneration. This approach identified signaling pathways controlling the development of pathogenic astrocytes in mice and humans.
Researchers from Harvard University developed an efficient method to make large numbers of C4-secreting human astrocytes from stem cells. A small group of about 20 drugs were identified that reduced C4 secretion, effective in both healthy and Schizophrenia patients' astrocytes.
Researchers at Tohoku University used fiber photometry to analyze astrocytes' activity and found an acid response linked to intensified epileptic seizures. This breakthrough may lead to new therapeutic strategies for epilepsy, stroke, trauma-induced brain injury, and memory enhancement in dementia treatment.
In a study published in Nature Communications, researchers found that astrocytes take over the role of cleaning up dead microglia, which are normally responsible for this task. This process is crucial for maintaining optimal conditions in the nervous system and preventing accumulation of cellular debris.
A new radiotracer, 18F-SMBT-1, detects overexpressed monoamine oxidase-B in cognitively unimpaired individuals with high beta amyloid levels, a key early sign of Alzheimer's disease. The agent shows increased binding to reactive astrocytes, suggesting its potential as a surrogate marker for detecting Alzheimer's disease.
Astrocytes play a crucial role in regulating the response to drug cues, acting as brakes on neuronal communication. By slowing down overactive communication, astrocytes can reduce the drive to seek drugs and prevent relapse.
A Brazilian study reveals that SARS-CoV-2 targets astrocytes in the brain, reducing neuron viability and causing damage. Infection was confirmed using MRI scans of mild COVID-19 patients and experiments on human nerve cells.
A study found that aberrant expression of MAO-B causes both peripheral and neuroinflammation in RA patients, leading to joint pain and cognitive impairment. Administering an MAO-B inhibitor called KDS2010 improved both joint inflammation and cognitive function in a RA animal model.
Tel Aviv University researchers discovered that skin cancer cells interact with astrocytes in the brain, promoting metastasis. By inhibiting this interaction using existing treatments, they delayed the spread of melanoma to the brain by 60-80%. This breakthrough has implications for treating advanced-stage melanoma.
Researchers at Tel Aviv University develop a groundbreaking method to eradicate glioblastoma brain tumors by targeting astrocytes and starving them of energy. The study found that in the absence of these brain cells, tumor cells die and are eliminated, offering a promising basis for developing effective medications.
A new study identifies how the suppression of a specific transcription gene triggers changes that impair oligodendrocyte function in Huntington's disease. The researchers believe replacing or fixing defective glia cells may prove a far easier proposition than replenishing neurons lost in the disease.
Researchers identified a molecule produced by astrocytes that interferes with normal neuron development in Rett, fragile X and Down syndromes. Blocking this molecule reduces disease signs in mice brains, suggesting potential therapeutics to treat these disorders.
Research at Karolinska Institutet reveals the glymphatic system malfunctions during bacterial meningitis, causing a buildup of toxic garbage that damages brain cells. The study found increased signs of neuroinflammation and neuronal damage in rats infected with Streptococcus pneumoniae.
A study reveals that four nonexcitatory amino acids can cause irreversible brain destruction after a stroke or traumatic brain injury. The amino acids flood the brain cells, leading to swelling and cell death.
Researchers have identified a group of latent stem cells in the central nervous system of mice that respond to injury by dividing, migrating towards damaged areas, and differentiating into astrocytes. If similar cells exist in humans, they could provide a new therapeutic approach for treating spinal cord injuries.