First Imaging Study to Implicate Brain Opioids Could Explain Addictive Nature of Behavioral Disorder, Say Johns Hopkins Researchers
The role of the brain’s opioid receptor system—or endorphin system—may hold the key to understanding and treating bulimia nervosa, according to research reported in the Society of Nuclear Medicine’s August issue of the Journal of Nuclear Medicine.
"Involvement of the opioid system may explain the addictive quality of this behavioral disorder," said Angela Guarda, M.D., assistant professor of psychiatry at Johns Hopkins School of Medicine in Baltimore, Md. The first imaging study to implicate the opioid system in bulimia nervosa shows differences in women with bulimia compared to healthy women, added J. James Frost, M.D., Ph.D., professor of radiology and neuroscience at Johns Hopkins and co-author of "Regional ì-Opioid Receptor Binding in Insular Cortex Is Decreased in Bulimia Nervosa and Correlates Inversely With Fasting Behavior." In the study, eight women with bulimia were compared to healthy women of the same age and weight. Their brains were scanned using positron emission tomography (PET) after injection with the short-acting radioactive compound carfentanil, which binds to mu-opioid receptors in the brain, explained Frost. PET is a powerful medical imaging procedure that noninvasively uses special imaging systems and radioactive tracers to produce pictures of the function and metabolism of the cells in the body. He noted, "We found that mu-opioid receptor binding in bulimic women was lower than in healthy women in the left insular cortex. The insula is involved in processing taste, as well as the anticipation and reward of eating, and has been implicated in studies of other driven behavioral disorders, including drug addiction and gambling.”
Maryann Verrillo | EurekAlert!
Study suggests possible new target for treating and preventing Alzheimer's
02.12.2016 | Oregon Health & Science University
The first analysis of Ewing's sarcoma methyloma opens doors to new treatments
01.12.2016 | IDIBELL-Bellvitge Biomedical Research Institute
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.
Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...
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