Articles tagged with Dendritic Spines
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Researchers from Kyushu University found that the brain forms new, high-density clusters of synapses on specific segments of dendrites during adolescence, challenging the 'adolescent synaptic pruning' hypothesis. This discovery may offer new hope for understanding the biological basis of schizophrenia and other neurodevelopmental condi...
Researchers have found that puberty triggers significant changes in brain connectivity patterns in individuals with a rare genetic disorder tied to autism. The study suggests that synaptic dysfunction during development may contribute to the condition's behavioral challenges.
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 at MIT's Picower Institute have discovered a new approach to treating fragile X syndrome by enhancing the activity of a specific component of 'NMDA' receptors. This strategy normalizes protein synthesis, neural activity and seizure susceptibility in hippocampus of fragile X lab mice, offering a promising therapeutic target.
Researchers identified hundreds of brain proteins associated with inter-individual differences in functional connectivity and structural covariation. The proteins were enriched for those involved in synapses, energy metabolism, and RNA processing, providing insights into the mechanistic basis of human cognition and behavior.
Researchers developed a novel molecular tool, SYNCit-K, that enhances synaptic strength, leading to induced sleep and improved sleep quality in mice. The study reveals the role of synaptic connections in controlling sleep homeostasis.
A recent study suggests that synaptic plasticity is a collective action, where the behavior of one synapse influences others. The researchers found that strong competition among neighboring spines affects their dynamics and influences the direction and extent of plasticity. Understanding how neurons manage synaptic resources may contri...
A study published in Science Advances found that the quality of synapses, specifically dendritic spine head diameter, predicts episodic memory performance in older adults. Researchers suggest targeting pathways that maintain spine head diameter or synaptic strength may yield greater therapeutic benefits for Alzheimer's disease prevention.
Salk scientists develop new method to quantify synaptic features, revealing high precision of plasticity and up to 10 times more storage capacity. The technique uses information theory to analyze synapse pairs from a rat hippocampus, offering a scalable approach for studying brain function.
Researchers at the University of Alabama at Birmingham found that blocking Tiam1 activity in spinal neurons abrogates morphine tolerance and hyperalgesia in a mouse model. Prolonged morphine treatment increased activated Tiam1 levels, leading to dendritic spine morphological changes.
Researchers uncover a pathophysiological mechanism that initiates and sustains neuropathic pain in mice, identifying Tiam1 as a potential therapeutic target. Targeting spinal Tiam1 with antisense oligonucleotides alleviates neuropathic pain hypersensitivity, offering promise for treating chronic pain.
Researchers have uncovered the underlying mechanism driving depressive systems in chronic pain, identifying a potential therapeutic target for treatment. Tiam1 protein modulates neural connections, leading to hypersensitivity and depression; ketamine blocks this effect, alleviating symptoms.
Researchers found that clonidine, a common blood pressure medication, can reduce the consolidation of traumatic memories in PTSD patients. By interacting with the adrenergic receptor axis, clonidine interferes with cofilin's ability to form mushroom-shaped dendritic spines, which are essential for memory formation. This suggests that c...
A University of Ottawa research team has made new discoveries on how motor skills are learned and stored in the brain. By studying mice, they found that a specific transcription factor called NPAS4 regulates gene changes in inhibitory neurons, leading to the formation of learning-associated neuron ensembles.
A recent study by Yale researchers found that psilocybin increases the density of dendritic spines, aiding information transmission between neurons and potentially treating depression. Mice subjected to stress showed behavioral improvements after receiving psilocybin, suggesting a possible therapeutic effect.
The study reveals that shootin1a mechanically links polymerizing actin with cell adhesion molecules in dendritic spines, enhancing coupling and allowing structural plasticity. This finding is significant as changes in dendritic spine plasticity have been implicated in various neurological disorders.
Researchers from Peter the Great St.Petersburg Polytechnic University propose a novel approach to analyzing dendritic spine shapes by considering clusterization methods. This approach can provide more accurate understanding of synaptic input and its relationship with learning, memory, and neurodegenerative disorders.
A study by the University of Montreal has revealed the rules of synaptic plasticity, a process underlying learning and memory. The research found that dendritic spines, tiny protrusions on neurons, amplify or suppress incoming information based on its strength.
A recent study published in Molecular Brain suggests that an imbalance of human gut microorganisms and excessive propionic acid consumption may contribute to autism. The researchers found that propionic acid disrupts autophagy, a natural cell mechanism, leading to reduced dendritic spine formation and hindering child brain development.
Researchers at the University of Alabama at Birmingham have identified LIMK1, a serine/threonine kinase, as a promising target for interventions against Alzheimer's disease. The enzyme is linked to the degradation of dendritic spines, which may play a role in dementia progression.
Researchers found that ketamine restores dendritic spines in the prefrontal cortex of mice with depression-like behavior. Healthy dendritic spines are crucial for long-term antidepressant effects, suggesting interventions to enhance their survival may be helpful in sustaining ketamine's benefits.
Researchers found ketamine restores functional connectivity and ensemble activity of neurons and eliminates depression-related behaviors. Dendritic spine formation is crucial for maintaining remission, but its slow process may indicate that it's a consequence of ketamine-induced rescue of prefrontal cortex circuit activity.
A study led by Duke Health found that a short course of the Alzheimer's drug donepezil can reverse structural and genetic brain changes caused by alcohol exposure in rats. This reverses dendritic spine density, affecting learning and memory. The research identifies a specific gene target for potential repair.
Scientists have identified the OTUD7A gene as a key contributor to the clinical characteristics of 15q13.3 microdeletion syndrome, a complex neurological condition. The study found that mice deficient in the gene Otud7a have fewer dendritic spines, which may be related to the neurological deficits observed in patients.
Scientists have discovered that axon damage leads to shrinking dendritic spines and rising excitability in neurons, but also found that blocking gene activity with netrin-1 can reverse these changes. This breakthrough could lead to improved treatments for brain injury patients.
Researchers at Max Planck Florida Institute for Neuroscience developed a photo-inducible CaMKII inhibitor to study intracellular signaling cascades. The tool revealed that CaMKII activation persists for approximately 1 minute, contradicting previous studies, and is necessary only for short periods of time for LTP and animal learning.
Scientists at Max Planck Florida Institute for Neuroscience created new molecular biosensors to study the activity of ERK and PKA proteins in dendritic spines. The team found that these proteins' activity spreads along the length of the dendrite, influencing nearby spines.
Researchers at Max Planck Florida Institute for Neuroscience developed a new software to automate the process of observing and quantifying long-term structural plasticity in dendritic spines. The software allows for efficient imaging and stimulation of multiple dendritic spines simultaneously, increasing productivity and reducing costs.
Researchers developed a new molecular tag to visualize two signaling proteins' activity in a single dendritic spine in real time. The technique, combining FRET and FLIM, allows for high spatial and temporal accuracy, enabling scientists to study biochemical dynamics of proteins with increased efficiency.
Scientists at Max Planck Florida Institute for Neuroscience found that dendrites play an active role in cortical processing and shape how neurons encode visual information. The arrangement of synaptic connections within the dendritic field supports this active role, enabling neurons to exhibit diverse selectivity.
Scientists identify protein MIM as a key player in initiating dendritic spines, which form the basis of neuronal connections. This discovery sheds light on the molecular mechanisms underlying brain diseases with altered dendritic spine density.
Scientists at Johns Hopkins Medicine have found that the flow of calcium ions into synapses activates CaMKII, which then unhooks SynGAP from scaffolding, spurring Ras signaling to begin. This discovery moves neuroscientists closer to understanding how learning and memory work and developing interventions for problems related to them.
Schizophrenia and bipolar disorder are associated with dendritic spine loss, suggesting shared pathophysiological features. Individuals with these disorders have reduced average spine density and number of spines per dendrite compared to control group individuals.
Researchers found that sleep after learning encourages the growth of dendritic spines in mice, which helps consolidate and strengthen new memories. The activity of brain cells during deep sleep is critical for this process, suggesting a physical mechanism for how sleep enhances memory formation.
Researchers at Columbia University Medical Center have found that caspase-2 is a key regulator of cognitive decline in Alzheimer's disease. The study suggests that inhibiting this protein could prevent neuronal damage and cognitive decline associated with the disease.
Dendritic spines play a vital role in isolating and amplifying electrical signals received at synapses, enabling neurons to communicate with each other. The discovery sheds light on the brain's complex processing mechanisms and may lead to advances in treating diseases like Alzheimer's and Huntington's.
A new study suggests that chronic exposure to artificial light at night can lead to depressive symptoms in rodents, which can be reversed by returning to a standard light-dark cycle. The study found that blocking the effects of tumor necrosis factor, a protein involved in depression, prevented the development of depressive-like symptoms.
Researchers have identified an unexpected source of diabetic neuropathy pain in laboratory rats with diabetes: changes in the structure of dendritic spines. This finding suggests a potential therapeutic strategy by targeting abnormal spines to alleviate pain.
A new study reveals how tau protein disrupts neuronal communication at synapses before obvious neuron damage, leading to early memory deficits and impaired synaptic function. The research identifies aberrant mislocalization of tau proteins in dendritic spines as a key mechanism driving disease progression.
Researchers at Northwestern University have found a way to mimic estrogen's effects on brain cells without increasing cancer risk. By activating an estrogen receptor, they increased the number of connections between brain cells, improving mental performance.
Microglia, immune cells long thought to be dormant, are found to constantly interact with synapses, creating and eliminating them. This discovery challenges current views of the brain and its functions.
Researchers have discovered two coordinated dance moves performed by skeletons inside neurons during long-term potentiation, a process linked to learning and memory. This finding provides insight into developmental disorders such as Williams syndrome, which affects cognitive strengths and weaknesses.
Studies found higher and lower levels of genes regulating spine plasticity in individuals with schizophrenia. These alterations may contribute to layer-specific deficits in dendritic spines, a structural abnormality relevant to the disorder. Further research aims to develop new treatments targeting these disturbances.
Two studies found that anomalies in the DISC1 gene and its interaction with Kal-7 protein disrupt dendritic spine formation, leading to weaker connections between neurons. This abnormal connectivity is thought to contribute to the onset of schizophrenia symptoms in young adulthood.
Researchers discovered that mice lacking neuregulin develop dendritic spine abnormalities and exhibit hallmarks of schizophrenia, supporting the hypothesis that glutamatergic neurons play a crucial role. The study suggests that developmental defects in brain structure may contribute to schizophrenia's onset.
UC Riverside-led researchers found that minocycline can mature dendritic spines in mice with Fragile X syndrome, leading to improved cognitive function and reduced anxiety. The study's findings have already impacted future therapies, including a new clinical trial in Toronto.
Neuroscientists at Georgetown University Medical Center found that transportation of brain transcripts is essential for growth and connection between neurons, forming the basis of memory and learning. This discovery may provide clues to understanding mental retardation and overall brain functioning.
Researchers found that acute stress activates corticotropin-releasing hormones, disrupting memory formation by disintegrating dendritic spines. Blocking CRH molecules' interaction can eliminate stress damage to these structures.
A molecular recycling plant has been found in the brain that enables nerve cells to record new experiences and maintain memories over time. This process involves the constant movement of receptors around synapses, which are then recycled and returned intact.
The study found that recycling endosomes transport cargo needed to grow new synapses, leading to advances in understanding Alzheimer's disease, autism, and age-related memory loss. The discovery may lead to potential treatments for these conditions by targeting critical cellular processes.
A University of Utah study suggests that proteins serve as anchors, holding other proteins in place to strengthen synapses and contribute to forming and retaining memories. The research is relevant not only to how memory and learning work but also to Alzheimer's disease, which involves a breakdown in protein movement within synapses.
Researchers at Duke University Medical Center discovered molecular portals in dendritic spines of neurons that facilitate endocytosis of receptors. This finding reveals a previously unknown level of organization in the brain, with implications for understanding neural connections and memory.
Researchers at Howard Hughes Medical Institute have developed a new technique to visualize the function of synaptic channels using optical fluctuation analysis. The study revealed that individual synapses typically hold only about six calcium channels, which open with high probability in response to action potentials.
Researchers at Max Planck Institute discovered that long-term potentiation in hippocampal neurons is linked to the emergence of new dendritic spines. This phenomenon suggests that structural changes play a crucial role in storing information in the brain.