Articles tagged with Potassium Channels
Potassium KCNQ2/3 channels need full functionality to work properly in the brain and reach their correct location. This is linked to their regulation by protein ankG. Altering channel functionality affects neuronal excitability and may contribute to developing new therapeutic strategies for epilepsy.
Chemists at UMass Amherst demonstrated that the soft gate regulating electrical flows in BK channels is inherently leaky, meaning it can't absolutely stop the flow of ions. This discovery points to a method for understanding how these channels work and malfunction.
Researchers found that the skin relies on TRPM8 sensor for cold detection, while internal organs primarily use TRPA1 sensor. This difference explains variations in external and internal cold perception, and has implications for understanding thermal homeostasis and pathologies related to cold sensitivity.
Researchers have identified a mechanism involving potassium channels that could provide a new approach to treating depression. The study, led by Dr. James Murrough, found that ezogabine improved depression symptoms and anhedonia in patients, normalizing brain activity in key regions.
Researchers discovered bombesin-like peptides in the body can trigger contractions in the vas deferens, a muscular tube carrying sperm in the male reproductive system. The peptides likely act through a specific receptor to induce contractions.
Researchers at Weill Cornell Medicine have discovered a precise mechanism by which an ion channel regulates its function, providing insights into fundamental biology and potential new treatments for diseases. The study identified a 'ball-and-chain' structure that plugs the channel, opening the way to modulate ion channel activity.
Researchers at SickKids have identified the KCNB2 gene as a key target for treating medulloblastoma. Targeting this gene can enhance current cancer treatments and tackle tumour growth without impacting surrounding healthy cells.
Researchers discovered special proteins that keep tiny particle membranes intact during transport, and found these proteins influence cargo function. Animal experiments showed ion channel protein is crucial for repairing heart damage in mice.
Researchers at the University of Würzburg discovered that plants use an energy-saving mechanism to adapt their potassium uptake based on soil conditions. By building a pH gradient across cell membranes, plants can transport potassium into cells without expending energy.
A new study identifies phosphatidylinositol 4,5-bisphosphate as a key regulator of the SK2 channel, which plays a critical role in cardiac ion channels and heart rhythm. The research provides critical translational insights into possible mechanisms of cardiac arrhythmias in heart failure.
A new study found that potassium ion channels in the Shaker family were present in single-cell organisms before the origin of the nervous system. This discovery challenges the conventional understanding of how these ion channels evolved alongside the nervous system.
A study has shown that a potassium ion channel located in mitochondria rewires metabolism in breast cancer cells, promoting tumor growth. The channel, BKCa, is linked to the Warburg effect, a metabolic hallmark of cancer, by causing increased lactate secretion and hydrogen peroxide levels.
Researchers at Flinders University have discovered a bedtime nasal spray that can reduce the severity of sleep apnea in people and lower their blood pressure. The study found that the spray, which blocks potassium channels, improved oxygen levels and reduced markers of OSA severity in 7 out of 10 participants.
A study identifies a genetic mutation underlying KCNQ2 encephalopathy, a rare and devastating form of epilepsy. The research reveals key mechanisms by which the disorder manifests in patients, including suppression of normal gene function and altered protein distribution.
A team of neuroscientists has discovered that oligodendrocytes, myelin-forming cells, accelerate glucose consumption to deliver energy-rich molecules to rapidly firing axons. This communication is mediated by potassium signals and maintains axonal health.
Researchers at UCL Queen Square Institute of Neurology have developed a new gene therapy that significantly reduces seizures in mice with focal cortical dysplasia. The treatment, which involves the overexpression of a potassium channel, has shown an average reduction of 87% in seizures without affecting the mouse's memory or behavior.
A new study shows that XEN1101 can reduce seizure frequency by more than 50% in some patients and sometimes eliminate seizures altogether. The medication, a potassium-channel opener, boosts the flow of potassium out of nerves to stop them from firing.
Researchers at Weill Cornell Medicine have discovered a unique site on BK channels that allows small molecules to selectively access the channel, potentially leading to the development of targeted drugs. This finding could help treat a range of diseases, including epilepsy and hypertension.
Researchers created a smart model system to visualize the gating of individual subunits in Kir2 potassium channels. The study reveals that each subunit gating transition leads to conductance level changes, suggesting all subunits must move together for a fully open channel.
A team of neurobiologists has found that fruit flies possess glial sheath structures similar to those in vertebrates, enabling rapid transmission of nerve impulses. The study reveals the evolution of these structures and their role in supporting neuronal function.
Luis Cuello, a professor at TTUHSC, has developed a method to express human potassium channels in bacteria, allowing for large-scale biophysical studies. This technology will be used to target several channels relevant to diseases such as epilepsy, arrhythmia, and diabetes.
Scientists found that chronic stress increases the activity of proopiomelanocortin (POMC) neurons, leading to behaviors such as anhedonia and depression. Inhibiting POMC neuron activity reduced these behavioral changes. The study suggests that POMC neurons play a key role in increasing susceptibility to stress-related behavioral problems.
A recent study led by Dr. Luis Cuello and Alain J. Labro found that a known Shaker channel mutation differs structurally from its human counterparts, with implications for drug development and ion transport mechanisms. The research reveals a unique conformation of the W434F mutant that is distinct from wild-type channels.
A team of researchers identified a protein kinase substrate downstream of the dopamine signaling pathway regulating brain reward behavior. The study found that phosphorylation of potassium voltage-gated channel subfamily Q member 2 (KCNQ2) decreases its channel activity, increasing neuronal excitability and promoting reward behavior.
A novel mutation in the Kcnc3 gene causes learning deficits in mice, specifically in spatial learning and memory. The study uses a forward genetics approach to identify the causal mutation, providing new insights into the genetic basis of learning and memory.
Researchers at Tokyo Institute of Technology have successfully synthesized a synthetic mechanosensitive potassium channel, exhibiting stimuli responsiveness and selective ion transport. The new ion channel could lead to breakthroughs in therapeutic treatments for ion-channel related diseases.
A wireless pacifier developed by researchers at Washington State University can monitor infants' electrolyte levels without the need for invasive blood draws. This non-invasive method provides real-time monitoring of sodium and potassium ion concentrations in saliva.
Researchers identified the 'key' controlling potassium ion flow across cell membranes, resolving a decades-old problem and providing a new understanding of how channels are gated. The discovery has potential implications for treating diseases such as cancers, epilepsy, and diabetes by targeting ion channel deregulation.
Researchers at Tufts University have found that manipulating voltage patterns in tumor cells can significantly reduce tumor cell invasion and metastasis in animal models. Using FDA-approved ion channel blockers, they were able to normalize cell voltages, decrease tumor growth, and limit the spread of cancer cells.
Researchers discovered that eliminating α-endosulfine (ENSA) or blocking its function reduces brain changes and improves memory in mice. ENSA blocks a potassium channel, which, when blocked, combats excess ENSA levels associated with Alzheimer's disease.
A recent study published in Cell Reports reveals that genetic variants in the Nav1.2 sodium channel are a leading cause of autism, leading to overactive sodium channels and seizures. Researchers propose developing medicines to open potassium channels as a potential treatment for these patients.
Researchers identified physical binding sites for cholesterol in GIRK channels, which play a role in neurodegenerative diseases. The study provides structural insights into how cholesterol alters channel function, paving the way for drug development.
Researchers have found that treatments to reduce levels of hydrogen sulfide in the brain may help ward off damage caused by the gas, which is involved in blocking key brain cell gateways. The study shows that H2S disrupts normal brain functioning and can lead to nerve cell death.
A team of researchers from the University of Fukui and Kanazawa University have challenged the long-held assumption that potassium channels are highly selective for potassium ions. Their findings indicate that sodium ions can also pass through these channels, with a conductance one-eightieth that of potassium ions.
Researchers from the University of Würzburg have discovered that certain genes are responsible for the development of male ornaments, including the iconic swordtail fin. These genes play a crucial role in sexual selection and may have evolved to enhance mating success.
A team of researchers has discovered a new role for a tiny linker in regulating transmembrane ion channels, which could lead to new targets for drugs and treatment in conditions such as hypertension and autism. The study found that the linker plays a more active sensing role than previously thought.
Researchers at the University of Pittsburgh Brain Institute identified a novel drug that can protect the brain during and after a stroke. The study shows that injured neurons can remain viable if prevented from following biochemical pathways leading to cell death.
Researchers discovered a novel potassium channel activator, GiGA1, that selectively opens GIRK channels and reduces neuronal excitability. Systemic administration of GiGA1 exhibits anti-seizure properties in an acute epilepsy animal model.
Researchers describe an alternative mechanism for the placement of potassium ion channels in cardiac cell membranes, which is crucial for heart function and may contribute to cardiovascular diseases. This discovery could lead to a better understanding of cardiac physiology and the development of new treatments for related disorders.
Researchers have identified the mechanism behind the large drop in blood pressure caused by intravenous paracetamol, which affects critically ill patients. By understanding this process, they believe a new co-therapy design is possible to prevent the side effect.
Researchers have imaged the 'ball-and-chain' mechanism of ion channels using cryo-electron microscopy, providing new insights into their regulation. This discovery has significant implications for designing targeted therapies for disorders such as epilepsies and heart arrhythmias.
A new study suggests that dofetilide, an FDA-approved antiarrhythmic drug, may counteract pathological changes in potassium channels associated with pulmonary arterial hypertension. In experimental models, dofetilide inhibited PAH-related vascular remodeling and improved lung function.
Researchers have discovered two potassium channels, TREK-1 and TRAAK, at the Nodes of Ranvier that enable rapid sensory and motor reactions in mammals. The channels allow for high-frequency nerve impulses with speeds up to 200 meters per second, essential for survival in a predator-prey world.
Researchers discovered a shared molecular mechanism among botanical folk medicines that lower blood pressure by activating the KCNQ5 potassium channel in blood vessels. This finding could lead to targeted therapies for diseases like hypertension and KCNQ5 loss-of-function encephalopathy.
Researchers discovered a new function in the BAG4 protein, which regulates potassium transport and optimizes water use by plants. This finding is crucial for developing crops resistant to drought conditions.
A team of researchers has successfully demonstrated that potassium ions migrate through the selectivity filter of potassium channels without water molecules in between. Their study, published in Science Advances, utilized solid-state nuclear magnetic resonance spectroscopy to provide conclusive evidence under natural conditions.
Researchers uncovered the molecular action of cilantro as a potent KCNQ channel activator, reducing seizure activity and opening potassium channels in the brain. This discovery may lead to more effective use of cilantro as an anticonvulsant or development of safer and more effective anticonvulsant drugs.
Research in mice suggests that defective potassium channels involved in pain detection can cause headaches and may be a target for future migraine treatments. The study found that the channels, specifically TRESK, regulate pain in facial sensory neurons, making them a promising area of focus for headache research.
A team of scientists has identified a previously unknown protein structure that enables the controlled intake of potassium ions into cells. The discovery, published in Nature Communications, reveals a complex mechanism involving two inter-subunit half-channels and challenges existing theories on potassium transport.
A team of computational biophysicists has identified a hydrophobic dewetting mechanism that blocks intracellular access to the selectivity filter in BK channels. This finding represents a paradigm shift in understanding the regulation and gating process of these channels, which play a crucial role in various health conditions.
A protein called TWIK2 is crucial for activating inflammation, presenting a new target for developing drugs that can restrain excessive inflammatory responses. The discovery opens up the possibility of targeted anti-inflammatory drugs to modify its function and reduce inflammation.
Scientists have discovered that fish use brief electrical pulses to communicate without being detected by predators. This adaptation may hold clues for treatments of conditions such as epilepsy and cardiac diseases. The research also provides insights into the genetic basis of unique abilities in animals.
Researchers at Texas Tech University Health Sciences Center identified a specific amino acid residue responsible for inverting potassium channel communication. The study paves the way for developing novel and safer therapeutic drugs to correct illnesses associated with potassium channel dysfunction.
Researchers at Baylor College of Medicine discovered that a scorpion venom component, iberiotoxin, can specifically block the potassium channel in fibroblast-like synoviocytes, reducing rheumatoid arthritis severity. Treatment with iberiotoxin reversed joint damage and inflammation in rat models without inducing side effects.
Researchers found that non-selective ion channels, like the NaK channel, have a selectivity filter with sizeable dynamics, unlike selective channels. The study revealed two different forms of the selectivity filter, one for each ion type, which explains why the NaK channel can pass both sodium and potassium ions.
Researchers have developed a novel PET tracer that can measure damage from multiple sclerosis by targeting potassium channels, providing quantitative information about underlying biochemical processes. This breakthrough has the potential to improve diagnosis and monitoring for MS patients.
Scientists have determined the kinetic cycle of a potassium channel at atomic resolution, allowing for more precise targeting of specific spots within the channel structure. This breakthrough could lead to the creation of new drug molecules that can correct potassium channels dysfunction, addressing conditions such as epilepsy and diab...
A new study published in Nature describes a complex structure that combines elements of ion pumps and channels to enable active transport of potassium, challenging traditional views on biological concepts.
Researchers at UC San Francisco have cracked the mystery of electrosensation in skates, revealing new insights into how these animals detect prey. The study found that specific ion channels play a crucial role in this process, and that there are similarities between the skate's electrosensory system and the mammalian auditory system.
The MacKinnon lab has reconstructed the three-dimensional architecture of three molecular channels using cryo-electron microscopy. The findings reveal intricate details about how these channels function, with implications for understanding muscle contraction, heart rhythm, and other physiological processes.