Articles tagged with Dopamine
A new Penn Medicine study found that dopamine replacement therapy is associated with an increase in impulse control disorders and excessive daytime sleepiness in newly diagnosed Parkinson's disease patients. In contrast, fatigue improved with dopamine therapy, but depression remained undertreated.
Researchers found that dolphins and beluga whales exhibit a delay between reward anticipation and squealing, suggesting they experience pleasure. This behavior is comparable to the timing of dopamine release in humans.
Researchers have discovered a mechanism to develop drugs that can control schizophrenia symptoms without causing common anti-psychotic side effects. By targeting the dopamine D2 receptor, the 'dimmer switch' approach aims to subtly dial down dopamine's effect, potentially treating the disease and avoiding side-effects.
Research found that lower dopamine transporter binding correlates with stronger visual attention bias for food cues, detecting food pictures more quickly among neutral images. Higher dopamine activity was linked to increased food intake over a period of 7 days.
Stimulating the ventral tegmental area with mild electric currents induced dopamine release and restored conscious behaviors in anesthetized rats. The study suggests that dopamine release from this region may play a role in emergence from general anesthesia.
Researchers discovered a link between credit assignment and choice bias, finding that people value rewards they choose more than equivalent rewards not chosen. The study used computational modeling and behavioral experiments to test the hypothesis, and found evidence supporting the proposed biological mechanism.
Recent research demonstrates a critical link between dopamine signaling and dopamine transporter function in neurological and psychiatric diseases. Michelle Sahai's simulations using TACC's Stampede supercomputer have contributed to the discovery of mutations in the dopamine transporter linked to Parkinsonism and ADHD.
Researchers discovered that faulty dopamine signaling can alter the activity of over 2,000 genes in the brain's prefrontal cortex, potentially leading to schizophrenia and other complex neuropsychiatric disorders. The study suggests a potential therapeutic approach using dopamine activators to restore normal signaling.
Researchers found that Zhichan decoction increased dihydroxyphenylacetic acid levels up to 10-fold after neural stem cell transplantation, promoting the differentiation of dopaminergic neurons. This study suggests a potential treatment for Parkinson's disease using traditional Chinese medicine.
A new Tel Aviv University study confirms that Parkinson's sufferers exhibit greater creative energy than healthy individuals. Researchers found that Parkinson's patients offered more original answers and thoughtful interpretations during testing.
Researchers found that ground cinnamon can reverse biomechanical changes in mice with Parkinson's disease by protecting neurons and normalizing neurotransmitter levels. Cinnamon is metabolized into sodium benzoate, an FDA-approved drug used to treat hepatic metabolic defects.
A study has identified a genetic mutation that may cause parkinsonism in young people, particularly those with Attention Deficit Hyperactivity Disorder (ADHD). The mutation affects the brain's transport of dopamine, leading to movement disorders and mental health issues.
A study by neuroscientists at Brigham Young University found that addiction starts with an overcorrection in the brain, triggering oxidative stress and a protein called BDNF. This process can lead to withdrawal symptoms like pain and anxiety.
A new study published in Biological Psychiatry found that individuals at high risk for addiction share similar neurobiological signatures with addicted individuals. The research suggests a common brain mechanism that promotes the use of addictive substances in vulnerable people and those with long-standing habitual substance use.
Researchers discovered that increased VMAT2 levels led to enhanced dopamine neurotransmission and protection from a neurotoxin. The study found improved outcomes on anxiety, depressive behaviors, movement, and protection from MPTP, a chemical causing Parkinson's disease-related damage.
Researchers found that genetic variants in dopamine-regulating genes influence strategic thinking, with three genes linked to belief learning and two genes linked to trial-and-error reinforcement learning. The study's findings have implications for understanding diseases like schizophrenia and social interaction disorders.
Scientists found a strong association between REM sleep disturbance and the development of progressive brain diseases like Parkinson's and dementia. Longitudinal imaging data showed decreased dopamine transporter density in patients with REM sleep disorder, which marked the first hints of Parkinson's disease.
Researchers at McLean Hospital have found that transplanted fetal dopamine cells can remain healthy and functional for up to 14 years in patients with Parkinson's disease. The discovery could lead to new therapies using stem cells grown in labs, reducing symptoms and the need for dopamine replacement drugs.
Transplanted dopamine neurons from fetal tissue remain healthy for at least 14 years after transplantation, according to a recent study. The findings suggest that stem cells can be a viable source for transplant-ready dopamine neurons, providing further rationale for pursuing this therapeutic approach.
Researchers have discovered a new treatment that targets the versatile Sigma-1 receptor, improving motor function and reducing inflammation in mice with Parkinson's-like conditions. The results suggest that early activation of this protein could protect brain cells against dopamine loss and associated neural damage.
A study from North Carolina State University found that increases in dopamine levels trigger dramatic physical changes in Indian jumping ant workers, transforming them into warrior queens with elevated life expectancy. This discovery has implications for understanding social insect behavior and epigenetics.
Researchers at MIT have developed a technique that allows them to track neural communication in the brain over time, offering a new window on brain function. The technique uses magnetic resonance imaging (MRI) along with a specialized molecular sensor to monitor dopamine levels in specific regions of the brain.
A new study published in Biological Psychiatry found that deep brain stimulation increases striatal dopamine release in patients with OCD, potentially aiding their control over compulsive behaviors. The treatment's effectiveness may relate to its ability to compensate for underlying dopamine dysfunction.
Researchers found that activating neurons instead of dampening them opens a new avenue to mimic and promote natural resilience. The study suggests a conceptually novel therapeutic strategy for treating depression.
A Wayne State University professor has received a nearly $1.7 million grant from the National Institutes of Health to investigate proteasome and parkin as potential pharmaceutical drug targets for treating methamphetamine-abuse related neurotoxicity.
Researchers at Douglas Mental Health University Institute have discovered that dopamine is present in the hippocampus and plays a key role in this region. This finding opens up new avenues for understanding psychiatric diseases such as schizophrenia and may lead to the development of new therapeutic approaches to improve symptoms.
Researchers have discovered that FDA-approved anti-psychotic drugs possess tumor-killing activity against glioblastoma. The finding is based on shRNA technology that identifies genes required for glioblastoma growth and reveals surprising links to dopamine regulation, a crucial component in treating Parkinson's disease and schizophrenia.
A new study will explore the connection between dopamine, a 'feel-good' brain chemical, and hearing loss. The research aims to develop better therapies for people with communication disorders, including those with Parkinson's disease. The $1.6 million grant will fund a team led by Christine Portfors at Washington State University.
Researchers at Duke University found that long-term spinal cord stimulation improved symptoms of Parkinson's-like disease in rats, protecting critical neurons and promoting better survival. The treatment may offer a new option for managing the condition.
Researchers discovered that dopamine-restoring drugs can improve visual function in animal models of diabetes. The study found that L-DOPA and dopamine receptor agonists improved acuity and contrast sensitivity, offering new avenues for treating diabetic retinopathy.
ProSavin, a novel gene therapy, has shown promise in reducing motor symptoms of Parkinson's disease by delivering dopamine-making genes directly into the brain. Significant improvements in motor scores were seen in all patients after treatment.
Researchers at the University at Buffalo used optogenetics to stimulate dopamine neurons, reducing binge drinking behavior in rats. The technique has potential applications for treating alcoholism, mental illnesses, and neurological diseases.
Researchers at Wake Forest Baptist Medical Center are using optogenetics to study the neurochemical basis of addiction. The technology allows them to control specific populations of brain cells using light, providing new direction on patterns of dopamine cell activation that may be most effective to target alcohol drinking.
A team of Montréal researchers discovered that the protein PC7 plays a critical role in the brain by affecting cognitive performance such as anxiety, learning, and emotional memory. The study found that mice lacking PC7 had impaired episodic and emotional memories, while exhibiting increased levels of dopamine in the brain.
Researchers at the University of Missouri have discovered that resveratrol may also block the effects of methamphetamine. The study found that resveratrol significantly diminished methamphetamine's ability to increase dopamine levels in the brain.
Researchers found no effect of low-dose dopamine or low-dose nesiritide on cumulative urine volume, kidney function, weight change, or clinical outcomes compared to placebo. The study's findings do not support the use of these drugs as a renal adjuvant therapy.
Researchers found that a volatile organic compound emitted by fungi, 1-octen-3-ol, attacks genes responsible for dopamine transport and packaging, leading to Parkinson's-like symptoms in fruit flies. The study suggests a potential link between fungal exposure and the degeneration of dopamine-producing neurons.
Researchers developed a simple dot test called the Triplets Learning Task (TLT) to assess dopamine loss in Parkinson's disease. The test shows promise as a non-invasive way to evaluate dopamine deficiency and may lead to new ways to improve treatment for PD patients.
Researchers at OHSU's Vollum Institute published two papers on neurotransmission in Nature, revealing a detailed view of the structural biology of the dopamine transporter. This breakthrough could lead to the development of better antidepressants with few or no side effects.
Scientists at ETH Zurich have created a genetic module that can be controlled via dopamine, which activates the production of an antihypertensive agent. The researchers found that contact with a female mouse triggered feelings of happiness in male mice, correcting hypertension and lowering blood pressure to normal levels.
Researchers found a molecular mechanism linking mechanical ventilation to hippocampal damage and mental impairment in ICU patients. The study suggests that elevated dopamine levels may contribute to the development of neurobehavioral disorders in patients exposed to mechanical ventilation.
A new study found that artificial sweeteners are less effective at reducing calorie intake because they don't provide the same energy reward as sugars. The brain prefers sugars over artificial sweeteners due to the release of dopamine, a chemical necessary for reward signalling.
Researchers at the University of Texas Health Science Center at San Antonio suggest that cell transplants could be a promising treatment for schizophrenia. By transplanting interneurons into the brain, they were able to restore normal function in rats with impaired dopamine systems, which are involved in cognition, movement, and emotions.
A new model system developed by Salk researchers completes the bridge between cellular and human studies of schizophrenia, enabling faster development of therapeutics. The model uses non-invasive scalp EEGs to detect brain activity, providing insights into sensory integration and neurotransmitter function.
Researchers found that individuals at high risk for alcoholism experience a greater dopamine response when drinking, which may contribute to increased desire for rewards and counteract the sedative effects of alcohol. This study provides insight into the causes of addiction and could mark an important step toward developing treatment o...
Research suggests that brain dopamine responses to alcohol ingestion may serve as a neurobiological marker of vulnerability to AUDs. Individuals at high risk showed increased brain dopamine, while those at low risk showed decreased dopamine levels. This finding could help identify individuals at higher risk for developing AUDs.
A new study from MIT suggests that dopamine signaling plays a crucial role in maintaining focus on long-term goals. The research reveals that the level of dopamine increases steadily throughout each trial, peaking as the animal approaches its goal, reflecting its distance from the reward.
Researchers have found that dopamine neurons are sensitive to reward but not punishment, suggesting a separate dimension for aversiveness. This discovery implies the existence of four neurotransmitters representing two dimensions of value.
Researchers are developing a brain implant that senses dopamine levels and suppresses reward signals to treat and possibly cure drug abuse. The device will be tested on anesthetized laboratory rats next month.
Researchers found lower dopamine levels in long-term cannabis users compared to non-users, suggesting a possible link between cannabis use and motivation issues. The study also suggests that cannabis use may be the cause of altered dopamine systems, which could explain increased risk of mental illnesses like schizophrenia.
Researchers found that electrical signals in the retina spiked high in response to chocolate, similar to those seen with methylphenidate, indicating increased dopamine release. This technique could be useful for studying food addiction and obesity prevention if validated through additional studies.
The new technique allows scientists to study protein function in individual cell types in a living organism, providing deeper insights into protein function. The approach uses nonsense-mediated decay (NMD) to restrict knockdown to a single cell type, giving complete control of gene expression.
Researchers found that insulin-resistant individuals exhibit lower natural dopamine release in response to glucose ingestion compared to healthy controls. The study suggests a possible link between abnormal eating behaviors and the onset of type 2 diabetes.
A recent fish study has identified a key hormone that enables zebrafish to replace damaged motor neurons, which could aid research into neurodegenerative diseases like ALS. This discovery also sheds light on the development of motor neurons in human embryonic stem cells.
Adults with ADHD who received methylphenidate treatment for 12 months showed a 24% increase in dopamine transporter density. This finding may affect how well these individuals respond to the medication, suggesting that elevated dopamine transporter levels are a consequence of chronic treatment rather than a marker for the disorder.
Researchers at Weill Cornell Medical College have developed an anti-cocaine vaccine that prevents the drug from reaching the brain and producing a high. The vaccine works by generating antibodies against cocaine, rendering it ineffective, and has shown promising results in non-human primates.
A novel gene therapy approach using nanoparticles to deliver GDNF may halt Parkinson's disease progression and reverse symptoms. This non-invasive method bypasses the blood-brain barrier, enabling continuous production of GDNF in brain cells.
A study by Indiana University researchers found that tasting beer without alcohol stimulates dopamine release in the brain, associated with drinking and other drug abuse. Participants with a family history of alcoholism showed increased responses, suggesting an inherited risk factor for alcoholism.
A Parkinson's drug has been shown to reverse age-related impairments in decision making in some older people. The study found that treating older adults with a dopamine-boosting drug improved their ability to learn from rewards and make better decisions, comparable to those in their twenties.
Researchers discovered that a reward linked to an image can activate the visual cortex in rhesus monkeys, indicating that rewards influence visual processing. The study used fMRI scans and found that dopamine signaling plays a key role in this process.