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Opiate addiction

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https://www.readbyqxmd.com/read/28449351/long-term-plasticity-of-corticostriatal-synapses-is-modulated-by-pathway-specific-co-release-of-opioids-through-kappa-opioid-receptors
#1
Sarah L Hawes, Armando G Salinas, David M Lovinger, Kim T Blackwell
Synaptic plasticity in striatum adjusts behaviour adaptively during skill learning, or maladaptively in the case of addiction. Just as dopamine plays a critical role in synaptic plasticity underlying normal skill learning and addiction, endogenous and exogenous opiates also modulate learning and addiction-related striatal plasticity. Though the role of opioid receptors in long-term depression in striatum has been characterized, their effect on long-term potentiation (LTP) remains unknown. In particular, direct pathway (Dopamine D1 Receptor containing; D1R) - spiny projection neurons (SPNs) co-release the opioid neuropeptide dynorphin, which acts at presynaptic kappa opioid receptors (KORs) on dopaminergic afferents and can negatively regulate dopamine release...
April 27, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28446883/in-vitro-and-in-vivo-profile-of-ppl-101-and-ppl-103-mixed-opioid-partial-agonist-analgesics-with-low-abuse-potential
#2
Taline V Khroyan, Andrea Cippitelli, Nicholas Toll, John A Lawson, William Crossman, Willma E Polgar, Lawrence Toll
Opiates are still the most effective and widely used treatments for acute and chronic pain. However, the problems associated with morphine and other standard opioid analgesics severely limit their effectiveness in the clinic. PPL-101 and PPL-103 derived from morphine and morphinan ring systems contain a chiral N-substituent, which confers it with a unique combination of high-binding affinities and partial agonist activities at mu, delta, and kappa opioid receptors, leading to unique in vivo pharmacology compared to other conventional opioids...
2017: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/28428748/resting-state-neuroimaging-and-neuropsychological-findings-in-opioid-use-disorder-during-abstinence-a-review
#3
REVIEW
Hada Fong-Ha Ieong, Zhen Yuan
Dependence to opiates, including illicit heroin and prescription pain killers, and treatment of the opioid use disorder (OUD) have been longstanding problems over the world. Despite intense efforts to scientific investigation and public health care, treatment outcomes have not significantly improved for the past 50 years. One reason behind the continuing use of heroin worldwide despite such efforts is its highly addictive nature. Brain imaging studies over the past two decades have made significant contribution to the understanding of the addictive properties as to be due in part to biological processes, specifically those in the brain structure and function...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28422795/trial-design-and-endpoint-evaluation-in-clinical-studies-addressing-chronic-back-pain
#4
Peter Staats
STUDY DESIGN: A review of the literature evaluating clinical trials of chronic back pain. OBJECTIVE: To assist physicians in assessing the quality of clinical trial data to make the most informed treatment decisions. SUMMARY OF BACKGROUND DATA: Chronic pain is a tremendous public health issue, affecting close to 100 million adults in the United States, and costs the American people billions of dollars. One traditional treatment approach, the long-term use of opiate medications, has recently come under intense scrutiny for problems with complications, diversion, abuse, addiction and lack of efficacy...
April 18, 2017: Spine
https://www.readbyqxmd.com/read/28422138/abnormal-resting-state-functional-connectivity-in-the-orbitofrontal-cortex-of-heroin-users-and-its-relationship-with-anxiety-a-pilot-fnirs-study
#5
Hada Fong-Ha Ieong, Zhen Yuan
Drug addiction is widely linked to the orbitofrontal cortex (OFC), which is essential for regulating reward-related behaviors, emotional responses, and anxiety. Over the past two decades, neuroimaging has provided significant contributions revealing functional and structural alternations in the brains of drug addicts. However, the underlying neural mechanism in the OFC and its correlates with drug addiction and anxiety still require further elucidation. We first presented a pilot investigation to examine local networks in OFC regions through resting-state functional connectivity (rsFC) using functional near-infrared spectroscopy (fNIRS) from eight abstinent addicts in a heroin-dependent group (HD) and seven subjects in a control group (CG)...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28398354/global-genetic-variation-of-select-opiate-metabolism-genes-in-self-reported-healthy-individuals
#6
F R Wendt, G Pathak, A Sajantila, R Chakraborty, B Budowle
CYP2D6 is a key pharmacogene encoding an enzyme impacting poor, intermediate, extensive and ultrarapid phase I metabolism of many marketed drugs. The pharmacogenetics of opiate drug metabolism is particularly interesting due to the relatively high incidence of addiction and overdose. Recently, trans-acting opiate metabolism and analgesic response enzymes (UGT2B7, ABCB1, OPRM1 and COMT) have been incorporated into pharmacogenetic studies to generate more comprehensive metabolic profiles of patients. With use of massively parallel sequencing, it is possible to identify additional polymorphisms that fine tune, or redefine, previous pharmacogenetic findings, which typically rely on targeted approaches...
April 11, 2017: Pharmacogenomics Journal
https://www.readbyqxmd.com/read/28397130/antidiarrheal-drug-therapy
#7
REVIEW
Lawrence R Schiller
INTRODUCTION: Acute diarrhea often runs a self-limited course and little by way of treatment is needed except for oral rehydration therapy. Chronic diarrhea poses a longer-term problem. If not treatable with specific therapy aimed at the underlying pathophysiology, chronic diarrhea often needs long-term symptomatic therapy. PURPOSE OF REVIEW: This paper aims to examine the options for symptomatic, nonspecific treatment of diarrhea. RECENT FINDINGS: The most frequently used therapies are opiate antidiarrheal drugs...
May 2017: Current Gastroenterology Reports
https://www.readbyqxmd.com/read/28394056/putting-a-face-to-opiate-addiction-for-students-at-a-needle-exchange-programme
#8
Rolando Tringale, Jo Marie Reilly
No abstract text is available yet for this article.
May 2017: Medical Education
https://www.readbyqxmd.com/read/28380057/specific-behavioral-and-cellular-adaptations-induced-by-chronic-morphine-are-reduced-by-dietary-omega-3-polyunsaturated-fatty-acids
#9
Joshua Hakimian, Ani Minasyan, Lily Zhe-Ying, Mariana Loureiro, Austin Beltrand, Camille Johnston, Alexander Vorperian, Nicole Romaneschi, Waleed Atallah, Fernando Gomez-Pinilla, Wendy Walwyn
Opiates, one of the oldest known drugs, are the benchmark for treating pain. Regular opioid exposure also induces euphoria making these compounds addictive and often misused, as shown by the current epidemic of opioid abuse and overdose mortalities. In addition to the effect of opioids on their cognate receptors and signaling cascades, these compounds also induce multiple adaptations at cellular and behavioral levels. As omega-3 polyunsaturated fatty acids (n-3 PUFAs) play a ubiquitous role in behavioral and cellular processes, we proposed that supplemental n-3 PUFAs, enriched in docosahexanoic acid (DHA), could offset these adaptations following chronic opioid exposure...
2017: PloS One
https://www.readbyqxmd.com/read/28363609/maternal-fetal-monitoring-of-opioid-exposed-pregnancies-analysis-of-a-pilot-community-based-protocol-and-review-of-the-literature
#10
Gareth Ryan, Joe Dooley, Rory Windrim, Megan Bollinger, Lianne Gerber Finn, Len Kelly
OBJECTIVES: To describe/analyse a novel, community-based prenatal monitoring protocol for opioid-exposed pregnancies developed by our centre in 2014 to optimize prenatal care for this population. A literature review of published monitoring protocols for this population is also presented. METHODS: Retrospective comparison of pre-protocol (n = 215) and post-protocol (n = 251) cohorts. Medline and Embase were searched between 2000-2016 using MeSH terms: [fetal monitoring OR prenatal care] AND [opioid-related disorders OR substance-related disorders] in Medline and [fetal monitoring OR prenatal care] AND [opiate addiction OR substance abuse] in Embase, producing 518 results...
March 28, 2017: Journal of Obstetrics and Gynaecology Canada: JOGC, Journal D'obstétrique et Gynécologie du Canada: JOGC
https://www.readbyqxmd.com/read/28356889/the-effects-of-different-intensities-of-exercise-on-behavioral-and-molecular-pain-related-reactions-in-rats-implications-for-medication-development
#11
Hong-Yu Liu, Kun Yang, Yuan Guo, Marc N Potenza, Yan Zhao
Drug discovery for pain management is an important area of research given current limitations in medications for pain, including the addictive potential of opiates. While exercise may help worsen or lessen pain, the precise molecular mechanisms involved are incompletely understood. Thus, in the present study, we evaluated the effects of exercise intensity on pain via assessment of behavior and c-Fos expression. An animal model of moderate and high-intensity treadmill exercise was established. The specific nociceptive behaviors, such as flinches, favoring, lifting, and licking, were observed within 60 min following intraplantar injection of formalin...
March 2017: Yale Journal of Biology and Medicine
https://www.readbyqxmd.com/read/28333316/convergent-balancing-selection-on-the-mu-opioid-receptor-in-primates
#12
Carolyn G Sweeney, Juliette M Rando, Helen N Panas, Gregory M Miller, Donna M Platt, Eric J Vallender
The mu opioid receptor is involved in many natural processes including stress response, pleasure, and pain. Mutations in the gene also have been associated with opiate and alcohol addictions as well as with responsivity to medication targeting these disorders. Two common and mutually exclusive polymorphisms have been identified in humans, A118G (N40D), found commonly in non-African populations, and C17T (V6A), found almost exclusively in African populations. While A118G has been studied extensively for associations and in functional assays, C17T is much less well understood...
March 15, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/28323538/relationships-between-a-dissociative-subtype-of-ptsd-and-clinical-characteristics-in-patients-with-substance-use-disorders
#13
Michaela Mergler, Martin Driessen, Christel Lüdecke, Martin Ohlmeier, Claudia Chodzinski, Steffen Weirich, Detlef Schläfke, Dirk Wedekind, Ursula Havemann-Reinecke, Walter Renner, Ingo Schäfer
The increasing support for a dissociative subtype of post-traumatic stress disorder (PTSD-D) has led to its inclusion in DSM-5. We examined relationships between PTSD-D and relevant variables in patients with substance use disorders (SUD). The sample comprised N = 459 patients with SUD. The International Diagnostic Checklist and the Posttraumatic Diagnostic Scale were used to diagnose PTSD. In addition, participants completed the Childhood Trauma Questionnaire and the Dissociative Experiences Scale. The course of SUD was assessed by means of the European Addiction Severity Index...
March 21, 2017: Journal of Psychoactive Drugs
https://www.readbyqxmd.com/read/28306543/peripheral-levels-of-bdnf-and-opiate-use-disorder-literature-review-and-update
#14
Raul Felipe Palma-Álvarez, Elena Ros-Cucurull, Kristopher Amaro-Hosey, Laia Rodriguez-Cintas, Lara Grau-López, Margarida Corominas-Roso, Cristina Sánchez-Mora, Carlos Roncero
Several neurobiological factors are related to opiate-use disorder (OUD), and among them, neurotrophins have a relevant role. Brain-derived neurotrophic factor (BDNF) is a central neurotrophin involved in many neuronal processes, and it has been related to several psychiatric diseases and addictive disorders. BDNF can be measured in plasma and serum; its levels may reflect BDNF concentrations in the central nervous system (CNS) and, indirectly, CNS processes. Hence, peripheral BDNF could be a biomarker in clinical practice...
March 17, 2017: Reviews in the Neurosciences
https://www.readbyqxmd.com/read/28291977/five-factor-model-personality-profiles-the-differences-between-alcohol-and-opiate-addiction-among-females
#15
Diana Raketic, Jasmina V Barisic, Snezana M Svetozarevic, Tatjana Gazibara, Darija Kisic Tepavcevic, Srdjan D Milovanovic
BACKGROUND: The prevalence of female alcohol and substance abusers has markedly increased. The main objective of this research was to explore personality profiles among females who had alcohol and opiate dependence. AIM: The aim of the study is to analyse if there is differences in personality profiles of females addicted to alcohol and opiates. We hypothesized that there might be significant differences in personality profiles among subgroups of women who present with alcohol and opiate use disorders...
March 2017: Psychiatria Danubina
https://www.readbyqxmd.com/read/28281909/positive-association-of-personal-distress-with-testosterone-in-opiate-addicted-patients
#16
Katrin Stange, Mathias Krüger, Eva Janke, Ralf Lichtinghagen, Stefan Bleich, Thomas Hillemacher, Annemarie Heberlein
Clinical studies report that substance addictions are associated with sociocognitive impairments. Regarding opiate-addicted patients, the few existing studies point to deficits in empathic abilities. Previous research suggests that testosterone might be a relevant biomarker of these impairments. The authors aimed to investigate whether opiate-addicted patients show specific impairments in emotional (empathic concern, personal distress) and cognitive empathy compared to healthy controls. Furthermore, the authors aimed to assess possible associations of testosterone levels with impaired empathic abilities in the patients' group...
March 10, 2017: Journal of Addictive Diseases
https://www.readbyqxmd.com/read/28268215/randomised-comparison-of-a-novel-buprenorphine-oral-lyophilisate-versus-existing-buprenorphine-sublingual-tablets-in-opioid-dependent-patients-a-first-in-patient-phase-ii-randomised-open-label-safety-study
#17
John Strang, Kylie Reed, Karolina Bogdanowicz, James Bell, Rob van der Waal, Jenny Keen, Pete Beavan, Shelagh Baillie, Alastair Knight
AIMS: To test the safety of new buprenorphine oral lyophilisate wafer ("bup-lyo") versus standard sub-lingual buprenorphine ("bup-SL"). DESIGN: Randomised (2:1) open-label study; opioid-dependent subjects; subsequent partial cross-over. SETTINGS: Specialised clinical trials facility and addictions treatment facility. PARTICIPANTS: Opioid-dependent subjects (n = 36) commencing buprenorphine maintenance (personalised dose-titration) including patients co-using alcohol, cocaine and benzodiazepines (below thresholds)...
March 8, 2017: European Addiction Research
https://www.readbyqxmd.com/read/28264758/merging-outpatient-addiction-and-opioid-maintenance-programs-during-a-disaster-lessons-from-hurricane-sandy
#18
Vishal K Gupta, Helena Hansen, Sonia Mendoza, Xinlin Linda Chen, Ronnie G Swift
OBJECTIVE: After Hurricane Sandy flooded Bellevue Hospital in New York City, its opiate maintenance patients were displaced and Bellevue's outpatient program was temporarily merged with the program at Metropolitan Hospital for continuation of care. The merger forced Metropolitan to accommodate a program twice as large as its own and required special staff coordination and adjustments in clinical care. METHODS: Physicians, clinicians, and administrators from both institutions participated in interviews regarding the merger...
March 7, 2017: Disaster Medicine and Public Health Preparedness
https://www.readbyqxmd.com/read/28258095/irish-gps-support-wider-use-of-naloxone-to-treat-opiate-addiction
#19
Susan Mayor
No abstract text is available yet for this article.
March 2, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/28247526/naltrexone-ameliorates-functional-network-abnormalities-in-alcohol-dependent-individuals
#20
Laurel S Morris, Kwangyeol Baek, Roger Tait, Rebecca Elliott, Karen D Ersche, Remy Flechais, John McGonigle, Anna Murphy, Liam J Nestor, Csaba Orban, Filippo Passetti, Louise M Paterson, Ilan Rabiner, Laurence Reed, Dana Smith, John Suckling, Eleanor M Taylor, Edward T Bullmore, Anne R Lingford-Hughes, Bill Deakin, David J Nutt, Barbara J Sahakian, Trevor W Robbins, Valerie Voon
Naltrexone, an opioid receptor antagonist, is commonly used as a relapse prevention medication in alcohol and opiate addiction, but its efficacy and the mechanisms underpinning its clinical usefulness are not well characterized. In the current study, we examined the effects of 50-mg naltrexone compared with placebo on neural network changes associated with substance dependence in 21 alcohol and 36 poly-drug-dependent individuals compared with 36 healthy volunteers. Graph theoretic and network-based statistical analysis of resting-state functional magnetic resonance imaging (MRI) data revealed that alcohol-dependent subjects had reduced functional connectivity of a dispersed network compared with both poly-drug-dependent and healthy subjects...
February 28, 2017: Addiction Biology
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