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Reward center addiction

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https://www.readbyqxmd.com/read/27620345/a-preliminary-study-of-longitudinal-neuroadaptation-associated-with-recovery-from-addiction
#1
Sarah E Forster, Peter R Finn, Joshua W Brown
BACKGROUND: Few studies have explored longitudinal change in event-related brain responses during early recovery from addiction. Moreover, existing findings yield evidence of both increased and decreased signaling within reward and control centers over time. The current study explored reward- and control-related signals in a risky decision-making task and specifically investigated parametric modulations of the BOLD signal, rather than signal magnitude alone. It was hypothesized that risk-related signals during decision-making and outcome evaluation would reflect recovery and that change in specific signals would correspond with improved treatment outcomes...
November 1, 2016: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/27502054/pilot-clinical-observations-between-food-and-drug-seeking-derived-from-fifty-cases-attending-an-eating-disorder-clinic
#2
Harriet Beitscher-Campbell, Kenneth Blum, Marcelo Febo, Margaret A Madigan, John Giordano, Rajendra D Badgaiyan, Eric R Braverman, Kristina Dushaj, Mona Li, Mark S Gold
Background The reward deficiency syndrome hypothesis posits that genes are responsible for reward dependence and related behaviors. There is evidence that both bulimia and anorexia nervosa, especially in women, have been linked to a lifetime history of substance use disorder (SUD). There are difficulties in accepting food as an addiction similar to drugs; however, increasingly neuroimaging studies favor such an assertion. Case presentations We are reporting the evidence of comorbidity of eating disorders with SUD found within these case presentations...
September 2016: Journal of Behavioral Addictions
https://www.readbyqxmd.com/read/27189881/modulation-of-pain-nociception-and-analgesia-by-the-brain-reward-center
#3
REVIEW
Vasiliki Mitsi, Venetia Zachariou
The midbrain dopamine center comprises a key network for reward, salience, motivation, and mood. Evidence from various clinical and preclinical settings points to the midbrain dopamine circuit as an important modulator of pain perception and pain-induced anxiety and depression. This review summarizes recent findings that shed light to the neuroanatomical, electrophysiological and molecular adaptations that chronic pain conditions promote in the mesolimbic dopamine system. Chronic pain states induce changes in neuronal plasticity and functional connectivity in several parts of the brain reward center, including nucleus accumbens, the ventral tegmental area and the prefrontal cortex...
December 3, 2016: Neuroscience
https://www.readbyqxmd.com/read/27147945/neuropharmacology-of-new-psychoactive-substances-nps-focus-on-the-rewarding-and-reinforcing-properties-of-cannabimimetics-and-amphetamine-like-stimulants
#4
REVIEW
Cristina Miliano, Giovanni Serpelloni, Claudia Rimondo, Maddalena Mereu, Matteo Marti, Maria Antonietta De Luca
New psychoactive substances (NPS) are a heterogeneous and rapidly evolving class of molecules available on the global illicit drug market (e.g smart shops, internet, "dark net") as a substitute for controlled substances. The use of NPS, mainly consumed along with other drugs of abuse and/or alcohol, has resulted in a significantly growing number of mortality and emergency admissions for overdoses, as reported by several poison centers from all over the world. The fact that the number of NPS have more than doubled over the last 10 years, is a critical challenge to governments, the scientific community, and civil society [EMCDDA (European Drug Report), 2014; UNODC, 2014b; Trends and developments]...
2016: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/27087806/the-influence-of-palatable-diets-in-reward-system-activation-a-mini-review
#5
REVIEW
Isabel Cristina de Macedo, Joice Soares de Freitas, Iraci Lucena da Silva Torres
The changes in eating patterns that have occurred in recent decades are an important cause of obesity. Food intake and energy expenditure are controlled by a complex neural system involving the hypothalamic centers and peripheral satiety system (gastrointestinal and pancreatic hormones). Highly palatable and caloric food disrupts appetite regulation; however, palatable foods induce pleasure and reward. The cafeteria diet is such a palatable diet and has been shown consistently to increase body weight and induce hyperplasia in animal obesity models...
2016: Advances in Pharmacological Sciences
https://www.readbyqxmd.com/read/27063845/application-of-fast-scan-cyclic-voltammetry-for-the-in-vivo-characterization-of-optically-evoked-dopamine-in-the-olfactory-tubercle-of-the-rat-brain
#6
Ken T Wakabayashi, Michael J Bruno, Caroline E Bass, Jinwoo Park
The olfactory tubercle (OT), as a component of the ventral striatum, serves as an important multisensory integration center for reward-related processes in the brain. Recent studies show that dense dopaminergic innervation from the ventral tegmental area (VTA) into the OT may play an outsized role in disorders such as psychostimulant addiction and disorders of motivation, increasing recent scientific interest in this brain region. However, due to its anatomical inaccessibility, relative small size, and proximity to other dopamine-rich structures, neurochemical assessments using conventional methods cannot be readily employed...
June 21, 2016: Analyst
https://www.readbyqxmd.com/read/26997723/effect-of-orexin-a-antagonist-sb-334867-infusion-into-the-nucleus-accumbens-on-consummatory-behavior-and-alcohol-preference-in-wistar-rats
#7
Santosh Mayannavar, K S Rashmi, Yalla Durga Rao, Saraswati Yadav, B Ganaraja
OBJECTIVE: Nucleus accumbens (NAcc) has a role in addiction and ingestive behavior. In order to assess orexinergic system involved in this, we infused Orexin A antagonist and assessed the effect on food intake fluid intake and alcohol preference in Wistar rats. MATERIALS AND METHODS: Inbred Wistar rats (n = 54) were divided into control and experimental groups (low dose and high dose). Using stereotaxic method, guide cannula was set in place bilaterally to reach NAcc...
January 2016: Indian Journal of Pharmacology
https://www.readbyqxmd.com/read/26939765/stereological-analyses-of-reward-system-nuclei-in-maternally-deprived-separated-alcohol-drinking-rats
#8
Marjorie C Gondré-Lewis, Philippe J Darius, Hong Wang, Joanne S Allard
The experience of early life stress can trigger complex neurochemical cascades that influence emotional and addictive behaviors later in life in both adolescents and adults. Recent evidence suggests that excessive alcohol drinking, and drug-seeking behavior in general, is co-morbid with depressive-like behavior. Both behaviors are reported in humans exposed to early life adversity, and are prominent features recapitulated in animal models of early life stress (ELS) exposure. Currently, little is known about whether or how ELS modulates reward system nuclei...
February 29, 2016: Journal of Chemical Neuroanatomy
https://www.readbyqxmd.com/read/26870706/temperament-and-character-dimensions-correlates-of-impulsivity-in-morphine-addicts
#9
Moslem Abassi, Abbas Abolghasemi
BACKGROUND: Given the role of temperament and character dimensions on impulsivity in addicts, the purpose of this study was to temperament and character dimensions: correlates of impulsivity in morphine addicts. OBJECTIVES: The aim of this study was to determine and verify the association of temperament and character dimensions with impulsivity in morphine addicts. PATIENTS AND METHODS: The research method was descriptive and correlational...
December 2015: International Journal of High Risk Behaviors & Addiction
https://www.readbyqxmd.com/read/26269227/early-phase-in-the-development-of-cannabidiol-as-a-treatment-for-addiction-opioid-relapse-takes-initial-center-stage
#10
REVIEW
Yasmin L Hurd, Michelle Yoon, Alex F Manini, Stephanie Hernandez, Ruben Olmedo, Maria Ostman, Didier Jutras-Aswad
Multiple cannabinoids derived from the marijuana plant have potential therapeutic benefits but most have not been well investigated, despite the widespread legalization of medical marijuana in the USA and other countries. Therapeutic indications will depend on determinations as to which of the multiple cannabinoids, and other biologically active chemicals that are present in the marijuana plant, can be developed to treat specific symptoms and/or diseases. Such insights are particularly critical for addiction disorders, where different phytocannabinoids appear to induce opposing actions that can confound the development of treatment interventions...
October 2015: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/26159624/evaluating-the-efficacy-of-a-web-based-self-help-intervention-with-and-without-chat-counseling-in-reducing-the-cocaine-use-of-problematic-cocaine-users-the-study-protocol-of-a-pragmatic-three-arm-randomized-controlled-trial
#11
RANDOMIZED CONTROLLED TRIAL
Michael P Schaub, Larissa J Maier, Andreas Wenger, Lars Stark, Oliver Berg, Thilo Beck, Boris B Quednow, Severin Haug
BACKGROUND: Web-based self-help interventions that aim to reduce problematic substance use are able to reach "hidden" consumer groups in the general population who often fear stigmatization and thus avoid institutional addiction treatment. In Western European countries, including Switzerland, cocaine is the most widely used psychoactive substance after alcohol, tobacco, and cannabis. Although approximately one in six users develop serious problems of dependency, only a minority seeks help from psychiatrists or in outpatient counseling centers or psychiatric hospitals...
2015: BMC Psychiatry
https://www.readbyqxmd.com/read/26048299/maternal-nicotine-exposure-during-lactation-alters-food-preference-anxiety-like-behavior-and-the-brain-dopaminergic-reward-system-in-the-adult-rat-offspring
#12
C R Pinheiro, E G Moura, A C Manhães, M C Fraga, S Claudio-Neto, V Younes-Rapozo, A P Santos-Silva, B M Lotufo, E Oliveira, P C Lisboa
The mesolimbic reward pathway is activated by drugs of abuse and palatable food, causing a sense of pleasure, which promotes further consumption of these substances. Children whose parents smoke are more vulnerable to present addictive-like behavior to drugs and food.We evaluated the association between maternal nicotine exposure during lactation with changes in feeding, behavior and in the dopaminergic reward system. On postnatal day (PN) 2,Wistar rat dams were implanted with minipumps releasing nicotine (N; 6 mg/kg/day, s...
October 1, 2015: Physiology & Behavior
https://www.readbyqxmd.com/read/25505414/gabaa-receptor-drugs-and-neuronal-plasticity-in-reward-and-aversion-focus-on-the-ventral-tegmental-area
#13
Elena Vashchinkina, Anne Panhelainen, Teemu Aitta-Aho, Esa R Korpi
GABAA receptors are the main fast inhibitory neurotransmitter receptors in the mammalian brain, and targets for many clinically important drugs widely used in the treatment of anxiety disorders, insomnia and in anesthesia. Nonetheless, there are significant risks associated with the long-term use of these drugs particularly related to development of tolerance and addiction. Addictive mechanisms of GABAA receptor drugs are poorly known, but recent findings suggest that those drugs may induce aberrant neuroadaptations in the brain reward circuitry...
2014: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/25500167/bridging-the-gap-between-the-neurocognitive-lab-and-the-addiction-clinic
#14
REVIEW
Ingmar H A Franken, Ben J M van de Wetering
In the past decennium there has been an enormous increase in new insights in cognitive mechanisms of addiction and their neural substrates. These candidate neurocognitive mechanisms, particularly those associated with "drive" and "control" aspects of addiction, are clearly involved in substance use problems but do not yet provide a full explanation. The neurocognitive mechanisms addressed in the present perspective are attentional bias, reward processing (both drive aspects) and error-processing and cognitive control (both control aspects)...
May 2015: Addictive Behaviors
https://www.readbyqxmd.com/read/25385024/neurophysiological-evidence-for-remediation-of-reward-processing-deficits-in-chronic-pain-and-opioid-misuse-following-treatment-with-mindfulness-oriented-recovery-enhancement-exploratory-erp-findings-from-a-pilot-rct
#15
RANDOMIZED CONTROLLED TRIAL
Eric L Garland, Brett Froeliger, Matthew O Howard
Dysregulated processing of natural rewards may be a central pathogenic process in the etiology and maintenance of prescription opioid misuse and addiction among chronic pain patients. This study examined whether a Mindfulness-Oriented Recovery Enhancement (MORE) intervention could augment natural reward processing through training in savoring as indicated by event-related brain potentials (ERPs). Participants were chronic pain patients at risk for opioid misuse who were randomized to 8 weeks of MORE (n = 11) or a support group control condition (n = 18)...
April 2015: Journal of Behavioral Medicine
https://www.readbyqxmd.com/read/25139065/hypoactivation-of-the-ventral-and-dorsal-striatum-during-reward-and-loss-anticipation-in-antipsychotic-and-mood-stabilizer-naive-bipolar-disorder
#16
Sarah W Yip, Patrick D Worhunsky, Robert D Rogers, Guy M Goodwin
Increased activity within known reward-processing neurocircuitry (eg, ventral striatum, VS) has been reported among medicated individuals with bipolar disorder (BD) I and II. However, such findings are confounded by the potential ameliorative effects of mood-stabilizing and antipsychotic medications on neural activations. This study tests the hypothesis that a pathophysiological locus of alterations in reward processing is present within the striatum in antipsychotic and lithium-naive individuals with BD. Twenty antipsychotic and lithium-naive individuals with BD II or BD not-otherwise specified (NOS) and 20 matched healthy comparison individuals participated in functional magnetic resonance imaging during the performance of a monetary incentive delay task...
February 2015: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/24999377/biological-substrates-of-addiction
#17
Max E Joffe, Carrie A Grueter, Brad A Grueter
This review is an introduction to addiction, the reward circuitry, and laboratory addiction models. Addiction is a chronic disease hallmarked by a state of compulsive drug seeking that persists despite negative consequences. Most of the advances in addiction research have centered on the canonical and contemporary drugs of abuse, however, addictions to other activities and stimuli also exist. Substances of abuse have the potential to induce long-lasting changes in the brain at the behavioral, circuit and synaptic levels...
2014: Wiley Interdisciplinary Reviews. Cognitive Science
https://www.readbyqxmd.com/read/24982760/vaccines-against-drugs-of-abuse-where-are-we-now
#18
REVIEW
Berma Kinsey
Drug addiction is a serious problem worldwide. One therapy being investigated is vaccines against drugs of abuse. The antibodies elicited against the drug can take up the drug and prevent it from reaching the reward centers in the brain. Few such vaccines have entered clinical trials, but research is going on apace. Many studies are very promising and more clinical trials should be coming out in the near future.
July 2014: Therapeutic Advances in Vaccines
https://www.readbyqxmd.com/read/24875980/drug-abuse-relapse-rates-linked-to-level-of-education-can-we-repair-hypodopaminergic-induced-cognitive-decline-with-nutrient-therapy
#19
Kenneth Blum, Stephen J Schoenthaler, Marlene Oscar-Berman, John Giordano, Margaret A Madigan, Eric R Braverman, David Han
It is well known that athletes and other individuals who have suffered painful injuries are at increased risk for all reward deficiency syndrome (RDS) behaviors, including substance use disorder (SUD). Comparing patient demographics and relapse rates in chemical dependence programs is pertinent because demographics may affect outcomes. Increased risk for relapse and lower academic achievement were found to have a significant association in recent outcome data from a holistic treatment center (HTC) located in North Miami Beach, FL...
May 2014: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/24850532/risky-decision-making-prefrontal-cortex-and-mesocorticolimbic-functional-connectivity-in-methamphetamine-dependence
#20
Milky Kohno, Angelica M Morales, Dara G Ghahremani, Gerhard Hellemann, Edythe D London
IMPORTANCE: Various neuropsychiatric disorders, especially addictions, feature impairments in risky decision making; clarifying the neural mechanisms underlying this problem can inform treatment. OBJECTIVE: To determine how methamphetamine-dependent and control participants differ in brain activation during a risky decision-making task, resting-state functional connectivity within mesolimbic and executive control circuits, and the relationships between these measures...
July 1, 2014: JAMA Psychiatry
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