Articles tagged with Calcium Channels
Scientists have obtained detailed snapshots of the structure of a membrane pore that enables epithelial cells to absorb calcium. This finding could accelerate the development of drugs to correct abnormalities in calcium uptake, which are linked to various types of cancer.
Researchers at MPFI uncovered the role of voltage-gated Ca2+ channels in determining neurotransmitter release and brain function. The team developed new methods to directly monitor channel impact, revealing a previously unknown region of the alpha subunit controlling channel positioning.
Researchers found that a single docking site uses a single cluster of calcium channels and that both numbers change with brain age, establishing the first clear link between morphology and function of docking sites.
A mislocalized calcium channel contributes to failed insulin secretion in type-2 diabetes, disrupting the cellular signal for release. Researchers found that the channel proteins are located too far away from insulin vesicles, causing secretion to fail.
Researchers have discovered that enzymes can be activated by electrical stimulation, leading to ultrafast signal transfer within cells. This process allows for locally restricted signaling, preventing unwanted cellular processes such as cell death.
The researcher is studying calcium channels in gonadotropes to understand their role in reproductive disease. This knowledge can lead to the development of new treatments for infertility, tumor growth, and other disorders.
A new study by Scripps Research Institute reveals a key difference in the brains of alcohol-dependent and nondependent rats. Alcohol increases activity in the central amygdala through two distinct brain signaling pathways, which can be targeted for personalized treatments.
A new study identified genes that may underlie differences in treatment outcomes for children with childhood absence epilepsy (CAE). The research suggests a potential link between gene variants and the effectiveness of certain drugs, paving the way for precision medicine approaches to tailor treatments.
Researchers found that different organs have distinct mitochondrial calcium portal compositions, allowing for tailored energy output. This difference may help explain organ failure and inform disease mechanisms.
Researchers at the Institute for Basic Science discovered that amino acid L-methionine activates calcium channels in plant guard cells, regulating stomatal opening and closing. This process is crucial for maintaining adequate intracellular calcium levels in plants, essential for growth and breathing.
Atrial fibrillation, a common irregular heartbeat, is linked to genetic variations in genes controlled by Tbx5 and Pitx2. The study offers insights into the mechanisms underlying heart arrhythmias, potentially leading to targeted treatments for patients with AF.
The study found that calcium channel blockers like verapamil and amlodipine work differently to treat heart arrhythmias and hypertension. Verapamil physically blocks pores to restore normal heart rhythm, while amlodipine indirectly prevents pore opening, relaxing blood vessels without affecting the heart.
Researchers found that a specific type of calcium-based signal regulates the production of immune cells that drive and ramp down the body's massive reaction to invading organisms. The study suggests that fine-tuning calcium signals may enhance immune responses to influenza vaccines and treat chronic inflammatory and autoimmune diseases.
A team of researchers has found that voltage-gated calcium channels open in unison to allow calcium ions into and activate excitable cells like neurons and muscle cells. This cooperative behavior could lead to improved therapies targeting aberrant calcium channels in malfunctioning cells.
The MCU structure is a homopentamer with a hydrophilic pore, featuring two carboxylate rings as the ion selectivity filter. This novel ion channel architecture suggests a passage for calcium transport.
Researchers discovered that all four parts of the IP3 receptor must be activated for calcium to increase and initiate fluid secretion. This finding has broad implications for understanding human secretory disorders like Sjögren's syndrome, which causes dry mouth and affects quality of life.
A NYU research team led by Dr. Rodrigo Lacruz has discovered the mechanism of calcium transport essential for dental enamel formation. The study found that CRAC channels play a critical role in controlling calcium uptake, which is necessary for enamel crystal growth.
Researchers have imaged the structure of IP3R, a calcium ion channel that controls cell function, offering insights into diseases like Alzheimer's, Parkinson's, and cancer. The discovery could lead to new treatments by enabling drug design venues.
Researchers created a plant-human hybrid protein OptoSTIM1 to modulate calcium channels, leading to improved memory in mice. The study showed a nearly twofold increase in fear stimulus response memory compared to non-light-stimulated mice.
Johns Hopkins scientists discovered that blocking calcium from entering mitochondria in heart cells didn't prevent cell death after heart attacks, but rather activated alternative pathways. The study's findings challenge the long-standing theory of using calcium channel blockage to prevent heart attack damage.
Researchers have discovered a crucial role for Cav3.1 calcium channels in healthy sleep patterns, which helps regulate slow-wave sleep and overall brain activity. The absence of this channel leads to abnormal brain function, including difficulties with falling asleep and staying asleep.
A faulty calcium channel in heart cells can cause a rare but potentially fatal heart condition called CPVT. When someone with the faulty gene exercises, adrenaline release can flood into the heart cells, causing a fatal arrhythmia.
Researchers at NYU Langone Medical Center identified a crucial role for calcium signaling in controlling inflammation during chronic lung infection caused by Mycobacterium tuberculosis. Calcium channels play a key role in shutting down the immune response and preventing injurious inflammation.
A study published in The Journal of General Physiology reveals the distinct roles of calcium channels in controlling arterial tone and blood flow to the brain. Researchers found that blocking L-type and T-type channels has opposite effects on blood flow, with one promoting vasodilation and the other constricting arteries.
Scientists at OIST Graduate University have determined that distance from calcium channels to vesicles impacts neuron's signaling precision. As rat subjects mature, the distance between gated channels and vesicles shrinks, increasing signal efficiency by 30%.
A study by Johns Hopkins researchers reveals that a form of calmodulin plays an active role in opening and closing ion channels, contrary to previous thought. This finding could lead to new treatments for disorders such as cardiac arrhythmias, epilepsy, and Parkinson's disease
Researchers discovered that mice missing TRPML1 calcium channel developed similar muscle defects as those present in muscular dystrophy patients. Increasing the activity of this channel improved muscle membrane repair and restored function. The goal is to develop a drug that can activate TRPML1 for potential treatment in humans.
Researchers identified a key clue to treating absence seizures by deleting the T-type calcium channel CaV3.3 in mice, which suppressed burst firing and increased tonic firing. This study challenges existing hypotheses and provides a foundation for developing effective treatment methods.
Researchers found that anandamide, a cannabinoid compound, directly causes Ca2+ influx and triggers an increase in intracellular Ca2+ concentration. The study discovered two independent mechanisms involving protein kinase C signaling pathway for anandamide's inhibitory effects on voltage-gated calcium channels.
Scientists found a shared mechanism regulating ion intake in sodium and calcium channels, enabling unified understanding of conditions affecting these channels. The discovery may lead to the development of next-generation pharmaceuticals targeting this common control element.
A study published in Science Signaling reveals that calcium channels in resting neurons activate the breakdown of Sp4, a transcription factor regulating gene expression. The research suggests that misregulation of Sp4 may contribute to the development of bipolar disorder.
Researchers have discovered how cone snail venom Vc1.1 works to reduce neuropathic pain by targeting specific calcium channels in neurons. This breakthrough could lead to the development of synthetic versions of Vc1.1 to treat certain types of chronic pain.
Researchers at the University of Wisconsin-Madison discovered that calcium waves can transmit information in plant cells, allowing them to respond quickly to environmental stressors. The team found that these waves are involved in processing information and sending rapid signals to help plants adapt to changing conditions.
Researchers at IST Austria found loose coupling between calcium channels and sensors in a specific synapse, challenging the view that it's a developmental phenomenon. This discovery has implications for synaptic plasticity and the function of neurotransmission.
University of Adelaide researchers have identified a crucial mechanism that can prevent liver failure resulting from excessive paracetamol consumption. By targeting the transient receptor potential melanostatine-2 (TRPM2) channel, they hope to develop new treatments for paracetamol overdose and potentially other liver-damaging poisonings.
Scientists have discovered a crucial step in how the body regulates 'free' calcium ions, which play a vital role in maintaining cellular functions. This finding has significant implications for developing new treatments for various neurological disorders, including Parkinson's disease.
Researchers discovered how calcium channels filter calcium ions from sodium sea to generate electrical signals. The channels use three binding sites to selectively admit calcium ions and keep out sodium, enabling fast cell signaling essential for muscle contractions, hormone secretion, and nerve impulses.
A recent study identified TRPC5, a molecule that plays a key role in the breakdown of the kidney filter, as a potential therapeutic target for stopping damage. The researchers found that blocking TRPC5 channels can prevent cytoskeletal collapse and subsequent kidney damage.
A University of Michigan study found two critical components involved in the brain's cell clearing process: TRPML1 calcium channel protein and an alipid molecule. The researchers also identified a synthetic chemical compound that can activate TRPML1, potentially providing a drug target for combating neurological diseases.
A recent study published in Nature reveals that septins play a crucial role in activating the calcium channel on T cell surfaces, allowing them to fight disease. This discovery provides new insights into the intricate pathways involved in turning on T cells and could lead to the development of more targeted drugs.
A new study found temperature-sensitive L-type calcium channels play a key role in febrile seizures. Nimodipine, a commonly available drug, dramatically reduced the incidence and duration of febrile seizures in animal models.
Researchers are working on a technique that can help identify and treat cancer tumors using manganese-enhanced magnetic resonance imaging (MEMRI). The goal is to guide and individualize treatment based on the presence of specific calcium channels in tumors.
A Loyola University Chicago study found that disabling a specific calcium channel called TRPM2 could reduce painful inflammation in gout. The researchers also discovered that liposomes with a positive or negative electric charge can stimulate the immune system to attack pathogens.
Researchers identified a genetic mutation that alters the kinetics of an ion channel in red blood cells, leading to anemia. The defect causes the channel to stay open too long, causing an ion leak and affecting the cell's volume regulation.
Researchers develop thermodynamically rigorous analysis to parse free energy of polymodal voltage- and ligand-dependent ion channels. This new approach offers a model-independent way to study ion channel gating, useful for constraining future atomic-scale models and understanding disruptions caused by genetic mutations.
Bisphenol A, a widely used industrial chemical, has been shown to block essential calcium channels in human and mouse cells. This can lead to adverse effects on heart muscle contraction, enzyme activity, and nerve cell communication. The study suggests that alternatives to BPA should be developed to replace it in various products.
Researchers at Temple University and the University of Pennsylvania identified a key protein, MCUR1, that regulates calcium entry into mitochondria. This discovery may lead to new treatment opportunities for diseases involving excessive calcium in cells.
Researchers have identified a cellular pathway for the effects of alpha hydroxyl acids on keratinocytes, leading to skin exfoliation. The study reveals that glycolic acid triggers an acidic environment within cells, activating the TRPV3 ion channel and causing calcium ion overload, resulting in cell death.
Researchers discovered that alpha 2 delta determines calcium channel presence at synapses, controlling neurotransmitter release. The study found that increasing or decreasing alpha 2 delta levels can triple or reduce the number of channels.
A University of Michigan team has identified a synthetic small molecule that can activate lysosome calcium channels, potentially treating rare inherited metabolic disorders and neurodegenerative diseases. The discovery could also provide insights into the aging process.
Researchers found that naked mole-rats retain a tolerance for oxygen deprivation into adulthood, similar to infant humans. This discovery could lead to better brain cell protection during heart attacks or strokes.
Researchers used the Canadian Light Source to study the sodium channel in heart cells, revealing a key role for calmodulin and calcium ions in regulating heartbeat. The findings shed light on two potentially life-threatening cardiac arrhythmia conditions, Brugada Syndrome and Long Q-T type 3.
A Northwestern University study identifies a key player in the human immune system, revealing its crucial role in activating the immune response. The protein, STIM1, was found to regulate not only one function but also another critical step in immune activation.
Researchers discovered that A-beta oligomers form calcium-permeable pores in the plasma membrane, inducing excess calcium influx into cells. This influx disrupts synaptic signaling and stimulates cell death, contributing to neurodegeneration associated with Alzheimer's disease.
UBC researchers identified the mechanism that leads T-cells to spring into action, providing a new target for future or existing drugs to bolster the immune systems of people with HIV or cancer. Such drugs could also be used to stop the rejection of transplanted organs or inhibit the immune system from attacking normal tissues.
Researchers at the University of Iowa have identified a new function for the harmonin protein, which is mutated in Usher syndrome. The protein plays a critical role in transmitting sound information to the brain.
Mutations in Timothy syndrome can cause severe cardiovascular disorders by disturbing calcium homeostasis. The current research focuses on the structure of L-calcium channels and reveals a highly conserved motif called G/A/G/A, essential for sealing the closed channel pore.
Researchers have identified a new potential target for treating Parkinson's disease by blocking T-type calcium channels, which may alleviate movement disorders. This approach has shown promise in a rat model of PD, suggesting a novel therapeutic strategy.
Researchers found that Aurora A was up-regulated and activated in epithelial cells lining PKD patient kidneys, binding to and phosphorylating polycystin-2. Inhibition of Aurora A boosted intracellular calcium levels, suggesting it may be a viable therapeutic target for boosting polycystin-2 activity in certain patients.
Researchers have uncovered the molecular mechanism of a biological sensor known as the gating ring, which regulates bodily activities such as blood pressure and insulin secretion. The findings could lead to therapies against diseases like hypertension and genetic epilepsy.