Dopamine News and Research

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Dopamine is a hormone and neurotransmitter occurring in a wide variety of animals, including both vertebrates and invertebrates. In the brain, this phenethylamine functions as a neurotransmitter, activating the five types of dopamine receptors — D1, D2, D3, D4 and D5, and their variants. Dopamine is produced in several areas of the brain, including the substantia nigra and the ventral tegmental area. Dopamine is also a neurohormone released by the hypothalamus. Its main function as a hormone is to inhibit the release of prolactin from the anterior lobe of the pituitary. Dopamine has many functions in the brain, including important roles in behavior and cognition, motor activity, motivation and reward, inhibition of prolactin production (involved in lactation), sleep, mood, attention, and learning. Dopaminergic neurons (i.e., neurons whose primary neurotransmitter is dopamine) are present chiefly in the ventral tegmental area (VTA) of the midbrain, substantia nigra pars compacta, and arcuate nucleus of the hypothalamus.

Vanderbilt University, AstraZeneca partner to identify candidate drugs for major brain diseases

Today, AstraZeneca and Vanderbilt University announced they have signed a research collaboration agreement to identify candidate drugs aimed at treating psychosis and other neuropsychiatric symptoms associated with major brain diseases such as Alzheimer's disease and schizophrenia.

16 Jan 2013

Patients with Parkinson's develop artistic talents after dopamine-inducing therapy

Parkinson's experts across the world have been reporting a remarkable phenomenon - many patients treated with drugs to increase the activity of dopamine in the brain as a therapy for motor symptoms such as tremors and muscle rigidity are developing new creative talents, including painting, sculpting, writing, and more.

16 Jan 2013

Dopamine-related drug exposure, Parkinson's increase risk of impulse control problems

Parkinson's disease itself does not increase the risk of impulse control problems such as compulsive gambling and shopping that have been seen in people taking certain drugs for Parkinson's disease, according to new research published in the January 8, 2013, print issue of Neurology, the medical journal of the American Academy of Neurology.

9 Jan 2013

Penn study suggests dopamine treatments may play role in increasing impulsivity

While approximately one in five Parkinson's disease patients experience impulse control disorder symptoms, the disease itself does not increase the risk of gambling, shopping, or other impulsivity symptoms, according to research from the Perelman School of Medicine at the University of Pennsylvania.

8 Jan 2013

Link between Parkinson's and benomyl

For several years, neurologists at UCLA have been building a case that a link exists between pesticides and Parkinson's disease. To date, paraquat, maneb and ziram - common chemicals sprayed in California's Central Valley and elsewhere - have been tied to increases in the disease, not only among farmworkers but in individuals who simply lived or worked near fields and likely inhaled drifting particles.

6 Jan 2013

DRD4 7R allele can contribute to longevity

A variant of a gene associated with active personality traits in humans seems to also be involved with living a longer life, UC Irvine and other researchers have found.

4 Jan 2013

Females students drink more intensively in shorter periods of time

Researchers from the HealthyFit group at the University of Vigo have studied university students' lifestyles; their analysis, which includes alcohol and illegal drug consumption habits, sport and food, concludes that most students indulge in unhealthy behaviour. One of the main results of the study is the high consumption of alcohol.

29 Dec 2012

Parkinson’s: an interview with Steve Ford, CEO of Parkinson’s UK

Parkinson’s disease is a neurological condition that is caused when brain cells, that produce the chemical messenger dopamine, start to die.

24 Dec 2012

GI bacteria exert some control over their hosts' appetites: Review

Over the last half decade, it has become increasingly clear that the normal gastrointestinal (GI) bacteria play a variety of very important roles in the biology of human and animals. Now Vic Norris of the University of Rouen, France, and coauthors propose yet another role for GI bacteria: that they exert some control over their hosts' appetites.

20 Dec 2012

Smoking ‘worsens hangovers’

People who smoke more than usual on the same day as drinking heavily are at increased risk for a hangover the following morning, with heavier smoking leading to a worse hangover, researchers say.

14 Dec 2012

LED light instantly triggers or reverses depression-like behavior in rodents

A specific pattern of neuronal firing in a brain reward circuit instantly rendered mice vulnerable to depression-like behavior induced by acute severe stress, a study supported by the National Institutes of Health has found. When researchers used a high-tech method to mimic the pattern, previously resilient mice instantly succumbed to a depression-like syndrome of social withdrawal and reduced pleasure-seeking - they avoided other animals and lost their sweet tooth.

13 Dec 2012

New way to effectively make designer drugs that hit collections of protein targets simultaneously

An international research collaboration led by scientists at the University of North Carolina School of Medicine and the University of Dundee, in the U.K., have developed a way to efficiently and effectively make designer drugs that hit multiple protein targets at once.

13 Dec 2012

Change of fatty diet can cause feelings like drug withdrawal and depression

Even before obesity occurs, eating fatty and sugary foods causes chemical changes in the brain, meaning that going on a diet might feel similar to going through drug withdrawal, according to a study published today by Dr. Stephanie Fulton of the University of Montreal's Faculty of Medicine and its affiliated CRCHUM Hospital Research Centre.

13 Dec 2012

Takeda, Lundbeck announce FDA acceptance of vortioxetine NDA submission

Takeda Global Research & Development Center, Inc., (Takeda) and H. Lundbeck A/S (Lundbeck) jointly announced today that the U.S. Food and Drug Administration (FDA) has accepted for filing their submission of a New Drug Application (NDA) for vortioxetine for the treatment of major depressive disorder (MDD) in adult patients.

13 Dec 2012

American Association of Anatomist announces winners of Young Investigator Awards

The American Association of Anatomist's (AAA) Young Investigator Awards combine three long-standing AAA awards-Bensley, Herrick, and Mossman-with the Morphological Sciences Award, all recognizing investigators in the early stages of their careers who have made important contributions to biomedical science through their research in cell/molecular biology, developmental biology, comparative neuroanatomy, or the morphological sciences.

12 Dec 2012

Western University research could lead to better treatments for PTSD and drug addiction

New research from Western University could lead to better treatments for Post-Traumatic Stress Disorder (PTSD) and drug addiction by effectively blocking memories. The research performed by Nicole Lauzon, a PhD candidate in the laboratory of Steven Laviolette at Western's Schulich School of Medicine & Dentistry has revealed a common mechanism in a region of the brain called the pre-limbic cortex, can control the recall of memories linked to both aversive, traumatic experiences associated with PTSD and rewarding memories linked to drug addiction.

6 Dec 2012

Smokers more likely to report hangover symptoms after heavy drinking

People who like to smoke when they drink may be at greater risk of suffering a hangover the next morning, according to a study in the January 2013 issue of the Journal of Studies on Alcohol and Drugs.

5 Dec 2012

Researchers derive dopaminergic neurons from bone marrow stem cells in monkeys

Parkinson's disease is a degenerative disorder of the central nervous system that is characterized by tremors, rigidity, slowness of movement, and difficulty walking. It is caused by loss of the neurons that produce the neurotransmitter dopamine (known as dopaminergic neurons). One of the primary goals in Parkinson's disease research is to develop a replacement for dopaminergic neurons.

4 Dec 2012

Lewy pathology out of favor as Parkinson’s culprit

Neurodegeneration and cellular dysfunction may precede the appearance of Lewy bodies in the substantia nigra, shows research that challenges the role of Lewy pathology in Parkinson’s disease.

30 Nov 2012

GM1 ganglioside effectively treats patients with Parkinson's disease

Treating Parkinson's disease patients with the experimental drug GM1 ganglioside improved symptoms and slowed their progression during a two and a half-year trial, Thomas Jefferson University researchers report in a new study published online November 28 in the Journal of the Neurological Sciences.

30 Nov 2012