Articles tagged with Dopamine
Scientists have discovered that a specific region of the brain, the ventral tegmental area, plays a key role in both inducing and relieving depression-like symptoms. By controlling this region with light stimulation, researchers were able to reverse depressed states in mice, providing new hope for future treatments.
A study by Imperial College London and Brunel University researchers found that stroke patients with spatial neglect performed better when offered a financial reward. The findings suggest new behavioral therapies for stroke patients and highlight a brain system that can be targeted by drugs.
Researchers found that L-DOPA can compensate for lost dopamine in motor pathways, improving symptoms. However, it also increased dopamine in reward pathways, which may have unanticipated effects on emotion and attention.
Researchers from the University of Copenhagen have created a model showing how ADHD medication influences the brain's reward system. The study found that dopamine signaling pathways are sensitive to drugs like Ritalin, leading to paradoxical effects at different dosages.
Scientists at Lund University are using optogenetics to investigate the behavior of transplanted brain cells in a model of Parkinson's disease. The study aims to determine whether light can be used to reinforce dopamine production and improve the effectiveness of nerve cell transplantation.
Researchers found dopamine neurons release GABA, a neurotransmitter that lowers neuronal activity, which could explain why restoring only dopamine leads to waning improvements in Parkinson's patients. This discovery highlights the complex interplay between dopamine and GABA in brain disorders like depression and addiction.
Researchers have created a new family of compounds that could slow Parkinson's disease progression by shutting down the Cav1.3 channel, which allows calcium to flood into dopamine neurons. The compounds were developed by Northwestern University scientists and show promise in animal trials without obvious side effects.
A Wayne State University researcher has developed a new method for analyzing brain chemicals using carbon fiber microelectrodes. The technique, which meets four key criteria of size, speed, selectivity and sensitivity, enables researchers to measure serotonin levels in mice with antidepressants within five minutes.
Researchers have discovered potential new targets for treating depression by modulating dopamine cells and the innate immune system in mice. Increasing activity of dopamine neurons produced depressed behavior, while inhibiting them eased symptoms.
A new model explains dopamine's direct and indirect role in modulating the immune system. Recent research has opened up possibilities for treating diseases such as Parkinson's and Alzheimer's disease, schizophrenia, multiple sclerosis, or autoimmune disorders.
Children spend an average of five screens at home by age 10 and six hours a day watching screens by adolescence. Prolonged screen time is linked to increased risks of heart disease, diabetes, obesity, attention span reduction, and psychosocial problems like Facebook depression and impaired empathy.
Scientists discovered that resveratrol, a natural compound found in red wine, may help improve mobility and prevent life-threatening falls among older people. The study showed that resveratrol decreased motor deficiencies in aging mice, leading to increased quality of life and reduced hospitalization risk.
A recent study published by researchers at UCSF found that increasing dopamine levels in the frontal cortex significantly decreased impulsivity in healthy adults. The study used a medication approved for Parkinson's disease to raise dopamine levels and measured its effect on decision-making tasks.
Scientists from the Max Planck Institute identified four different types of dopamine-releasing nerve cells involved in forming positive and negative memories in fruit flies. These nerve cells use dopamine to communicate with other neurons, and their activation can signal aversive or rewarding stimuli.
Researchers used deep brain stimulation to treat binge eating in mice and found a significant reduction in consumption of high-fat food. The study suggests that deep brain stimulation may be an effective therapy for obesity by modulating activity of neurons expressing the type 2 dopamine receptor.
Researchers discovered that dopamine inhibits melatonin production by forming 'heteromers' with norepinephrine receptors, regulating the body's circadian rhythm. This discovery could lead to new treatments for circadian rhythm disturbances and sleep disorders affecting 40% of the world's population.
A study using molecular imaging found a link between low dopamine levels and aggressive behavior in competitive situations. Participants with lower dopamine synthesis capacity were more likely to act out with aggression when provoked.
Scientists at Harvard University have created a comprehensive list of inputs that connect directly to dopamine neurons in the brain, revealing new connections and insights into Parkinson's disease and addiction. The study uses genetically-modified rabies virus to track neural pathways, providing quantitative data for future investigati...
Researchers at UTSC used electroanalytic technique voltammetry to study dopamine and alpha-synuclein interactions, finding that higher pH levels and ionic strengths facilitate aggregate formation. The findings could lead to new ways to screen drugs for Parkinson's disease treatment.
Researchers found that a mutation in the BTBD9 gene in fruit flies disturbs sleep patterns, similar to restless legs syndrome (RLS) in humans. The mutant flies have altered dopamine levels and are more mobile during wakefulness.
Researchers at the University of Pennsylvania discovered a mechanism involving dopamine that switches fruit fly behavior from diurnal to nocturnal, parallelled by human sundown syndrome. The team found that increased night-time activity is associated with elevated dopamine signaling in flies.
Researchers have identified two dopamine receptors, dDA1 and DAMB, that play a crucial role in regulating memory formation and forgetting. The study found that the dDA1 receptor is essential for memory acquisition, while the DAMB receptor triggers forgetting of recently acquired but not yet consolidated memories.
A Vanderbilt University study found that individual differences in dopamine levels in specific brain areas affect motivation and willingness to work for rewards. The research provides new insights into the role of dopamine in human behavior and may have implications for treating mental illnesses like depression and schizophrenia.
A new human study suggests that dopamine levels in the brain play a crucial role in determining how hard people work. Individuals with higher dopamine activity in certain areas showed greater motivation and effort, while those with increased dopamine in other areas were less likely to exert effort.
A study led by neuroscientists at the University of North Carolina at Chapel Hill School of Medicine found that activation of GABA neurons in a specific area of the midbrain inhibits dopamine neuron function, leading to a disruption in reward consumption. This discovery could lead to new mental health therapies.
Researchers at Karolinska Institutet discovered that pridopidine binds to the sigma-1 receptor, a previously unknown mechanism of action. This finding could lead to new treatments for schizophrenia, Parkinsonian tremors, and neurodegenerative diseases.
Researchers have found that bath salts contain two structurally similar chemicals that produce dissimilar effects on the brain's dopamine transport system. The combination of these chemicals enhances the effects of each other, leading to feelings of euphoria and long-lasting stimulation.
Researchers found that Parkinson's disease patients who took dopamine therapy showed improved creative skills, including drawing, painting, poetry, and sculpture. However, the study also revealed a lack of correlation between creative thinking scores and impulsivity measures.
Research reveals that drinking alcohol induces significant brain atrophy and specific shrinkage in cerebral cortex and thalamus in genetically vulnerable mice. The findings support the protective role of dopamine D2 receptors against alcohol-induced brain damage.
Researchers at the University at Buffalo discovered how parkin gene mutations cause Parkinson's disease by studying live human neurons. The study identified potential new drug targets and a screening platform to discover treatments, providing hope for a cure.
Researchers at Gladstone Institutes discovered a protein called RGS4 that contributes to Parkinson's disease symptoms by disrupting brain circuits. Removing RGS4 can prevent these symptoms, offering a potential alternative to existing treatments like Levodopa.
Research reveals a molecular partnership between ghrelin receptor and dopamine receptor in brain neurons that regulate appetite, shedding light on the underlying mechanisms of obesity and dopamine signaling disorders. The study suggests potential therapeutic targets with fewer side effects, offering new hope for treating these conditions.
Researchers found that reward prediction error is the result of a complex interplay between dopamine and GABA neurons. The interaction helps calculate reward prediction error, shedding light on how behaviors can be reinforced through normal brain function or by damaging neuron interactions.
Researchers found that NMDA receptors on dopamine neurons are essential for habit formation, allowing brain cells to communicate and increase activity. The discovery provides new direction for therapy to treat diseases like Parkinson's and opens the door to speeding up good habit formation.
Researchers found that dopamine injections improved blood flow to tumors, doubling the concentration of an anticancer drug and increasing its effectiveness. Dopamine also normalized the structure of abnormal tumor blood vessels, a condition typically associated with reduced chemotherapy and radiation therapy effectiveness.
A specific gene variant is associated with a higher risk of premature death and relapse among alcohol-dependent individuals. Research found that carriers of this variant are 10 times more likely to die prematurely compared to the general population.
Researchers discovered that eliminating acetylcholine secretion boosted dopamine actions, potentially improving motor symptoms in Parkinson's disease. The study used genetically modified mice to investigate the role of neurotransmitters in the striatum, a region affected by the disease.
A team of researchers at the University of Western Ontario has demonstrated that eliminating a specific neurotransmitter in the striatum may improve brain function in Parkinson's disease. By using genetically-modified mice and high-level behavior and imaging techniques, the researchers found that neurons responsible for this neurotrans...
Pridopidine, a novel dopidine, appears well-tolerated and warrants further investigation for patients with Huntington's disease. The drug improved voluntary motor function and reduced chorea symptoms in a phase 3 trial.
The Toxoplasma parasite affects dopamine production in infected brain cells, leading to increased dopamine levels and changes in behavior. This discovery may provide new insights into treating human neurological disorders such as schizophrenia, ADHD, and Parkinson's disease.
Researchers have successfully measured dopamine release in a human brain, tracking its movement between brain cells while a subject makes decisions. The study provides preliminary evidence that dopamine can predict future market changes.
A study found that children with specific dopamine system gene variants showed improved response to methylphenidate, the most commonly prescribed ADHD medication. The findings suggest a potential way to predict treatment course and tailor approach for each child.
Researchers developed a brain scan method to quickly test whether drugs increase dopamine levels, alleviating attention deficits in mice with neurofibromatosis type 1. The technique may lead to matching specific treatments to patients with NF1 and attention deficit disorders.
A study published in Neuron found that brain regions beyond the reward centers engage when playing games, suggesting a more widespread role for reward processing in the brain. The research used multi-voxel pattern analysis to identify patterns of brain activity associated with wins and losses.
Researchers at Gladstone Institutes have discovered how dopamine levels affect brain cells involved in movement control, offering new hope for treating Parkinson's disease. A study found that a lack of dopamine alters the interaction between two groups of brain cells, leading to difficulties controlling movement.
Researchers found that a dysfunctional co-signaling system between glutamate and dopamine in the brain increases cravings for both natural substances like sugar and abused drugs. This can lead to addiction, as the brain becomes hypersensitive to rewards.
Researchers at Emory University School of Medicine identified a gene related to HPRT1 that explains why mice with the same mutation do not exhibit self-destructive behavior like humans. The PRTFDC1 gene may be a target for treating Lesch-Nyhan disease, a condition characterized by delayed development and neurological problems.
Vanderbilt University researchers found that dopamine in the kidneys plays a crucial role in regulating blood pressure and life span. The study suggests that targeting the kidney dopamine system may be effective in treating hypertension and progressive kidney diseases.
New research shows ghrelin stimulates dopamine release in response to rewarding food, potentially making food more appealing. The study suggests a gut hormone-induced change in the brain's reward system, supporting the interaction between peripheral signals and behavior.
Researchers discovered that ghrelin is required for prolonged psychosocial stress to promote preference for high-fat food in mice. A ketogenic diet also suppresses seizures by reducing adenosine levels, while HDL from patients with coronary artery disease has different effects on blood vessel lining cells compared to healthy individuals.
Researchers have identified why dopamine replacement therapy has a negative effect on cognition in Parkinson's disease patients. The study found that the treatment enhances functions of the dorsal striatum at the expense of the ventral striatum.
Researchers discovered that male voles in established relationships displayed less interest in amphetamine compared to single counterparts. The study found changes in the brain's reward system depending on relationship status, with paired voles showing reduced D1 receptor binding and increased dopamine release.
Research shows that eating triggers anxiety in individuals with anorexia nervosa, rather than the expected feeling of pleasure. The study uses brain imaging technology to demonstrate a paradoxical response to food in people with the disorder, highlighting the need for effective treatment strategies.
A new study found that nicotine can induce long-lasting changes in the brain's reward system, similar to cocaine. The researchers discovered that a receptor called D5 dopamine plays a key role in this process.
A new study by neurobiologist Hitoshi Morikawa found that repeated ethanol exposure enhances synaptic plasticity in a key area of the brain. This increased capacity for learning, or 'conditionability,' may help explain why alcoholics become more receptive to forming habits and memories related to food, music, and social situations.
Researchers at Karolinska Institutet discovered that dopamine controls the formation of new neurons in the adult brain by acting as a switch for stem cells. The study used salamanders, which can recover from Parkinson's-like conditions, to understand how dopamine regulates neural regeneration.
Researchers at the University of Colorado School of Medicine have discovered a drug that turns on a protective gene, protecting brain cells from degeneration. The drug, phenylbutyrate, has been shown to prevent the progression of Parkinson's disease in mice and is now being tested in humans.
New research suggests that defective regulation of microtubules may be responsible for at least some cases of Parkinson's disease. Microtubule disruption impairs dopamine release, leading to oxidative stress and cell death.
A study found that binge eaters experience a spike in dopamine levels when exposed to their favorite foods, triggering a desire for more. This neurological response is distinct from other obese individuals who do not exhibit this reaction.
Researchers have discovered that the brain's 'reward' center also responds to negative experiences, such as fear, which can lead to increased dopamine production. This finding could help explain thrill-seeking behavior and inappropriate habits like drug addiction.