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.

BPS Annual Meeting to be held Feb. 25 - 29 in San Diego

The latest news and discoveries in medicine, physics, environmental science, and interdisciplinary fields will be featured at the 56th Annual Meeting of the Biophysical Society (BPS), held Feb. 25 - Feb. 29, 2012, at the San Diego Convention Center in San Diego, Calif. With more than 4,000 poster presentations, 200 exhibits, 20 symposia, and 6,000 research scientists in attendance each year, the BPS Annual Meeting is the largest meeting of biophysicists in the world.

7 Feb 2012

Scientists evaluate growth, differentiation and function of iPSC-derived NPCs in PD

Induced pluripotent stem cells (iPSC) are a promising avenue for cell replacement therapy in neurologic diseases. For example, mouse and human iPSCs have been used to generate dopaminergic (DA) neurons that improve symptoms in rat Parkinson's disease models. Reporting in the current issue of the Journal of Parkinson's Disease, a group of scientists from Japan evaluated the growth, differentiation, and function of human-derived iPSC-derived neural progenitor cells (NPCs) in a primate model, elucidating their therapeutic potential.

25 Jan 2012

Alexithymia associated with depression in de novo PD patients

Alexithymia has been found to be strongly associated with depression in both general and clinical populations. Alexithymic and depressive symptoms may be partially overlapping, but not all are correlated with depressive symptoms, thus underlining the relative independence of the two disorders. Parkinson's disease (PD) is a clinical condition often characterized by depression and an altered emotional processing. In medicated PD patients alexithymia has a prevalence of 21% and is related to depression.

23 Jan 2012

Research on neuron interaction could lead to potential treatment for addiction

Harvard scientists have developed the fullest picture yet of how neurons in the brain interact to reinforce behaviors ranging from learning to drug use, a finding that might open the door to possible breakthroughs in the treatment of addiction.

19 Jan 2012

Alcohol-dependent Americans more likely to seek treatment than South Koreans

Hazardous alcohol use and depression are among the 10 leading causes of disability and premature death worldwide, according to the World Health Organization. Many low- to middle-income countries have begun to see a steady increase in alcohol use and have entered the early stages of a tobacco epidemic. A study of alcohol use disorders (AUDs), nicotine dependence (ND), and mood and anxiety disorders in the United States and South Korea has found that while AUDs are substantially more common among Americans than South Koreans, alcohol-dependent Americans are significantly more likely to seek treatment.

17 Jan 2012

DBS safe and effective for patients with advanced Parkinson's

Researchers from the University of Florida and 14 additional medical centers reported results today in the online version of The Lancet Neurology journal indicating that deep brain stimulation - also known as DBS - is effective at improving motor symptoms and quality of life in patients with advanced Parkinson's disease.

12 Jan 2012

Study finds no support for primary pathogenic role of LBs in PD

The pathology of Parkinson's disease is characterized by a loss of dopamine-producing neurons in the pars compacta of the substantia nigra (SN), an area of the brain associated with motor control, along with the development of α-synuclein (αS) protein in the form of Lewy bodies (LB) in the neurons that survive. The spread of LB pathology is thought to progress along with the clinical course of Parkinson's disease, although recent studies suggest that they are not the toxic cause of cell death.

10 Jan 2012

Positive topline results from Civitas' CVT-301 Phase 1 trial on PD

Civitas Therapeutics, Inc., a privately-held pharmaceutical company developing transformative therapeutics using the ARCUS(TM) respiratory delivery platform, announced today positive topline results from a Phase 1 clinical trial for CVT-301, an inhaled formulation of levodopa (L-dopa) for the rapid relief from motor fluctuations associated with Parkinson's disease.

7 Jan 2012

New information about how early ESCs develop and form primate species

Newly published research by scientists at Oregon Health & Science University provides significant new information about how early embryonic stem cells develop and take part in formation of the primate species.

6 Jan 2012

Ipsen, Oncodesign partner to discover and develop LRRK2 kinase inhibitors against PD

Oncodesign, a Drug Discovery company and Oncology pharmacology service provider, and Ipsen, a global specialty-driven pharmaceutical company, announced today that the two companies have entered into a research collaboration to discover and develop innovative LRRK2 kinase inhibitors as potential therapeutic agents against Parkinson's Disease and for potential additional uses in other therapeutic areas.

5 Jan 2012

RGS9-2 gene plays a role in regulating body weight

Abraham Kovoor was studying a brain protein, called RGS9 2, that he had previously related to the involuntary, random and repetitive body movements that are side effects of drugs used to treat Parkinson's disease and schizophrenia.

5 Jan 2012

Advice for newly-diagnosed Parkinson's patients

After 12 years with Parkinson's disease (PD), 57-year old Bill Schmalfeldt has this advice for newly-diagnosed Parkinson's patients.

17 Dec 2011

NACP and MAPT polymorphisms interact to influence rate of Parkinson's progression

Parkinson's disease is marked by the abnormal accumulation of α-synuclein and the early loss of dopamine neurons in the substantia nigra region of the brain. A polymorphism in the promotor of α-synuclein gene known as NACP-Rep1 has been implicated as a risk factor for the disease.

16 Dec 2011

Researchers convert astrocytes directly into dopamine-producing neurons

In efforts to find new treatments for Parkinson's Disease (PD), researchers from the Perelman School of Medicine at the University of Pennsylvania have directly reprogrammed astrocytes, the most plentiful cell type in the central nervous system, into dopamine-producing neurons.

14 Dec 2011

New exercise and memory study for Parkinson's disease patients

Researchers from the University of Maryland School of Medicine and the Baltimore VA Medical Center have launched a study of exercise and computerized memory training to see if those activities may help people with Parkinson's disease prevent memory changes. The type of memory that will be examined is known as "executive function;" it allows people to take in information and use it in a new way.

13 Dec 2011

Euthymics presents EB-1020 preclinical data on ADHD at ACNP annual meeting

Euthymics Bioscience, Inc. today announced that it has presented preclinical data demonstrating that EB-1020, a next-generation product candidate for adult attention deficit/hyperactivity disorder (ADHD), may be effective for treating ADHD without the burden of drug abuse liability.

8 Dec 2011

EnVivo presents positive EVP-6124 Phase 2b trial data on schizophrenia at 50th ACNP meeting

EnVivo Pharmaceuticals, a company dedicated to developing a broad range of novel central nervous system (CNS) therapies, announced today that it is presenting the comprehensive analysis of a recently completed Phase 2b clinical trial of EVP-6124, a novel, orally bioavailable nicotinic alpha-7 agonist, in schizophrenia at the American College of Neuropsychopharmacology 50th Anniversary Annual Meeting.

5 Dec 2011

Preliminary top-line results from XenoPort's XP21279 Phase 2 trial for advanced Parkinson’s disease

XenoPort, Inc. announced today preliminary top-line results of a Phase 2, randomized, crossover clinical trial that compared optimized treatment with either Sinemet (immediate-release levodopa/carbidopa) or XP21279 co-formulated with carbidopa (279/CD) in advanced Parkinson's disease patients with motor fluctuations.

5 Dec 2011

Study shows new biochemical disturbances in the brains of children with ADHD

A new study at örebro University in Sweden shows that children with ADHD have nearly 50 percent less of a protein that is important for attention and learning. The finding may mean that there are other biochemical disturbances in the brains of individuals with ADHD than was previously believed.

5 Dec 2011

Enrollment complete in Ceregene's CERE-120 Phase 2b trial for Parkinson's

Ceregene, Inc. reported today that it has completed enrollment in its Phase 2b trial of CERE-120, a gene therapy product expressing the neurturin (NRTN) gene for the treatment of Parkinson's disease.

1 Dec 2011