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https://www.readbyqxmd.com/read/28924009/site-specific-regulation-of-p2x7-receptor-function-in-microglia-gates-morphine-analgesic-tolerance
#1
Heather Leduc-Pessah, Nicholas L Weilinger, Churmy Y Fan, Nicole E Burma, Roger J Thompson, Tuan Trang
Tolerance to the analgesic effects of opioids is a major problem in chronic pain management. Microglia are implicated in opioid tolerance, but the core mechanisms regulating their response to opioids remain obscure. By selectively ablating microglia in the spinal cord using a saporin-conjugated antibody to Mac1, we demonstrate a causal role for microglia in the development, but not maintenance, of morphine tolerance in male rats. Increased P2X7 receptor (P2X7R) activity is a cardinal feature of microglial activation, and in this study we found that morphine potentiates P2X7R-mediated Ca(2+) responses in resident spinal microglia acutely isolated from morphine tolerant rats...
September 18, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28919445/cognitive-effects-of-labeled-addictolytic-medications
#2
REVIEW
Camille Noélie Pujol, Cecilia Paasche, Vincent Laprevote, Benoit Trojak, Pierre Vidailhet, Elisabeth Bacon, Laurence Lalanne
INTRODUCTION: Alcohol, tobacco, and illegal drug usage is pervasive throughout the world, and abuse of these substances is a major contributor to the global disease burden. Many pharmacotherapies have been developed over the last 50years to target addictive disorders. While the efficacy of these pharmacotherapies is largely recognized, their cognitive impact is less known. However, all substance abuse disorders are known to promote cognitive disorders like executive dysfunction and memory impairment...
September 14, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28919058/fair-hearing-outcomes-of-patients-recommended-discharge-from-methadone-maintenance
#3
Jamie Suki Chang, Joshua D Chiu, Valerie A Gruber, James L Sorensen
A system known as fair hearings is a due process opportunity for patients who are involuntarily discharged from methadone maintenance treatment to challenge the discharge recommendation. We know very little about the processes and outcomes of fair hearings. For this study, we used a mixed methods approach to retrospectively analyze 73 fair hearing reports that were documented from a California methadone maintenance treatment program between 2000 and 2014. The aims of the study were to identify the reasons for involuntary discharge recommendation from methadone maintenance, describe the factors involved when fair hearing outcomes decided in favor of the clinic, and describe the factors involved when fair hearing outcomes decided in favor of the patient...
July 26, 2017: Journal of Substance Abuse Treatment
https://www.readbyqxmd.com/read/28918267/compulsivity-in-opioid-dependence
#4
Serenella Tolomeo, Keith Matthews, J Douglas Steele, Alex Baldacchino
OBJECTIVE: This study aimed to investigate the relationship between compulsivity versus impulsivity and structural MRI abnormalities in opioid dependence. METHOD: We recruited 146 participants: i) patients with a history of opioid dependence due to chronic heroin use (n=24), ii) heroin users stabilised on methadone maintenance treatment (n=48), iii) abstinent participants with a history of opioid dependence due to heroin use (n=24) and iv) healthy controls (n=50)...
September 13, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28904357/social-demographic-shift-in-drug-users-at-the-first-ever-methadone-maintenance-treatment-in-wuhan-china
#5
Cong Liu, Pu-Lin Liu, Quan-Lin Dong, Li Luo, Jun Xu, Wang Zhou, Xia Wang
The methadone maintenance treatment (MMT) has been initiated in Wuhan, China since early 2006. To understand the social-demographic, behavioral, and infectious diseases characteristics of drug users enrolled in their first-ever-MMT between 2006 and 2015, a retrospective observational study was implemented to also provide evidence for health policy-decisions to reduce harm and control disease. Pearson chi-square tests and t-tests were used to assess significant differences between two 5-year periods, 2006-2010 and 2011-2015...
September 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28901836/the-overlap-of-sleep-disturbance-and-depression-in-primary-care-patients-treated-with-buprenorphine
#6
Sarah L Garnaat, Risa B Weisberg, Lisa A Uebelacker, Debra S Herman, Genie L Bailey, Bradley J Anderson, Katherine M Sharkey, Michael D Stein
BACKGROUND: Sleep disturbance is common among patients receiving long-term opioid therapies, such as methadone maintenance. However, little is known about sleep disturbances in patients receiving medication treatment with buprenorphine. We sought to determine the frequency of subjective sleep disturbance in a sample of patients receiving medication treatment and to examine clinical factors related to sleep disturbance. METHODS: Participants were 328 persons receiving buprenorphine at 3 primary care sites...
September 13, 2017: Substance Abuse
https://www.readbyqxmd.com/read/28898536/treatment-with-naloxegol-versus-placebo-pain-assessment-in-patients-with-noncancer-pain-and-opioid-induced-constipation
#7
Lynn Webster, Ulysses Diva, Raj Tummala, Mark Sostek
OBJECTIVE: To summarize results from pain and opioid use assessments with naloxegol in adults with opioid-induced constipation (OIC) and chronic noncancer pain. METHODS: Two phase 3 randomized, double-blind, 12-week studies evaluated the efficacy and safety of oral naloxegol (12.5 or 25 mg daily) in adults (18-<85 years) with confirmed OIC and chronic noncancer pain: KODIAC-04 (NCT01309841) and KODIAC-05 (NCT01323790). Pain level was assessed daily (11-point Numeric Rating Scale [NRS]; 0=no pain, 10=worst imaginable pain)...
September 12, 2017: Pain Practice: the Official Journal of World Institute of Pain
https://www.readbyqxmd.com/read/28872697/perceived-barriers-and-facilitators-to-providing-methadone-maintenance-treatment-among-rural-community-pharmacists-in-southwestern-ontario
#8
Joseph Fonseca, Andrew Chang, Feng Chang
PURPOSE: Misuse of opioids has become a public health concern across North America. Rural patients have limited access to methadone maintenance treatment (MMT), an opioid addiction-treatment service that could be offered by community pharmacists. The aim of this study was to identify rural community pharmacists' perceived barriers, motivations, and solutions to offering MMT to their patients. METHODS: One-on-one, semistructured interviews were conducted with 11 community pharmacists who practice in rural southwestern Ontario...
September 5, 2017: Journal of Rural Health
https://www.readbyqxmd.com/read/28869859/maternal-buprenorphine-treatment-and-infant-outcome
#9
Lauren M Jansson, Martha L Velez, Krystle McConnell, Nancy Spencer, Michelle Tuten, Hendree Jones, Rebeca Rios, Van L King, Neeraj Gandotra, Lorraine Millio, Janet A DiPietro
BACKGROUND AND OBJECTIVES: Maternal buprenorphine maintenance predisposes the infant to exhibit neonatal abstinence syndrome (NAS), but there is insufficient published information regarding the nature of NAS and factors that contribute to its severity in buprenorphine-exposed infants. METHODS: The present study evaluated forty-one infants of buprenorphine-maintained women in comprehensive substance use disorder treatment who participated in an open-label study examining the effects of maternal buprenorphine maintenance on infant outcomes...
August 31, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28853970/primary-care-physicians-views-about-prescribing-methadone-to-treat-opioid-use-disorder
#10
James D Livingston, Erica Adams, Marlee Jordan, Zachary MacMillan, Ramm Hering
BACKGROUND: Methadone maintenance treatment is an effective way to reduce harms associated with opioid use disorder and, in several countries, is delivered in community-based primary care settings. Expanding methadone into primary care depends, in part, on physicians' willingness and readiness to integrate it into their practices. OBJECTIVES: This qualitative study explores factors that primary care physicians consider important when contemplating prescribing methadone to treat opioid use disorder...
August 30, 2017: Substance Use & Misuse
https://www.readbyqxmd.com/read/28841113/pharmacoepigenomics-of-opiates-and-methadone-maintenance-treatment-current-data-and-perspectives
#11
Cynthia Marie-Claire, Clément Jourdaine, Jean-Pierre Lépine, Frank Bellivier, Vanessa Bloch, Florence Vorspan
Current treatments of opioid addiction include primarily maintenance medications such as methadone. Chronic exposure to opiate and/or long-lasting maintenance treatment induce modulations of gene expression in brain and peripheral tissues. There is increasing evidence that epigenetic modifications underlie these modulations. This review summarizes published results on opioid-induced epigenetic changes in animal models and in patients. The epigenetic modifications observed with other drugs of abuse often used by opiate abusers are also outlined...
September 2017: Pharmacogenomics
https://www.readbyqxmd.com/read/28829626/transitioning-from-methadone-to-buprenorphine-maintenance-in-management-of-opioid-use-disorder-during-pregnancy
#12
Shakevia Johnson, Peter R Martin
BACKGROUND: Opioid use disorder during pregnancy is a growing health concern. Methadone maintenance is the treatment of choice but emerging data indicate buprenorphine is a viable alternative. Due to costs and limited accessibility of methadone, pregnant women may require transition from methadone to buprenorphine for maintenance treatment. OBJECTIVES: To assess safety and effectiveness of transitioning from methadone to buprenorphine when necessary during pregnancy...
August 22, 2017: American Journal of Drug and Alcohol Abuse
https://www.readbyqxmd.com/read/28807904/no-clinically-relevant-drug-drug-interactions-between-methadone-or-buprenorphine-naloxone-and-anti-viral-combination-glecaprevir-and-pibrentasvir
#13
Matthew Kosloski, Weihan Zhao, Armen Asatryan, Jens Kort, Pierre Geoffroy, Wei Liu
The combination of glecaprevir (formerly ABT-493), a nonstructural (NS) protein 3/4A protease inhibitor, and pibrentasvir (formerly ABT-530), a NS5A protein inhibitor, is being developed as treatment for HCV genotype 1-6 infection. The pharmacokinetics, pharmacodynamics, safety, and tolerability of methadone or buprenorphine/naloxone when coadministered with the glecaprevir and pibrentasvir combination in HCV-negative subjects on stable opioid maintenance therapy were investigated in a Phase 1, single-center, two-arm, multiple-dose, open-label sequential study...
August 14, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28807162/chinese-herbal-medicine-for-the-treatment-of-drug-addiction
#14
Weili Zhu, Yinan Zhang, Yingjie Huang, Lin Lu
This chapter summarizes recent developments in preclinical and clinical research on Chinese herbal medicines and their neurochemical mechanism of action for the treatment of drug addiction. We searched Chinese and English scientific literature and selected several kinds of Chinese herbal medicines that have beneficial effects on drug addiction. Ginseng (Renshen) may be clinically useful for the prevention of opioid abuse and dependence. Rhizoma Corydalis (Yanhusuo) may be used to prevent relapse to chronic drug dependence...
2017: International Review of Neurobiology
https://www.readbyqxmd.com/read/28759635/intolerance-of-uncertainty-in-opioid-dependency-relationship-with-trait-anxiety-and-impulsivity
#15
Julia Garami, Paul Haber, Catherine E Myers, Michael T Allen, Blazej Misiak, Dorota Frydecka, Ahmed A Moustafa
Intolerance of uncertainty (IU) is the tendency to interpret ambiguous situations as threatening and having negative consequences, resulting in feelings of distress and anxiety. IU has been linked to a number of anxiety disorders, and anxiety felt in the face of uncertainty may result in maladaptive behaviors such as impulsive decision making. Although there is strong evidence that anxiety and impulsivity are risk factors for addiction, there is a paucity of research examining the role of IU in this disorder...
2017: PloS One
https://www.readbyqxmd.com/read/28755768/a-naturalistic-study-of-predictors-of-retention-in-treatment-among-emerging-adults-entering-first-buprenorphine-maintenance-treatment-for-opioid-use-disorders
#16
Prabhoo Dayal, Yatan Pal Singh Balhara
INTRODUCTION: Emerging adulthood (between the ages 18-25years) has been conceptualized as a specific developmental stage based on unique psychosocial characteristics. Opioids are commonly used drugs in this population. Few studies have reported predictors of retention in buprenorphine maintenance treatment among opioid-dependent emerging adults, particularly from India. Moreover, no study has examined outcomes with opioid maintenance treatment among emerging adults in non-clinical trial, naturalistic settings...
September 2017: Journal of Substance Abuse Treatment
https://www.readbyqxmd.com/read/28753197/corrigendum-low-dose-add-on-memantine-treatment-may-improve-cognitive-performance-and-self-reported-health-conditions-in-opioid-dependent-patients-undergoing-methadone-maintenance-therapy
#17
Yun-Hsuan Chang, Shiou-Lan Chen, Sheng-Yu Lee, Po See Chen, Tzu-Yun Wang, I Hui Lee, Kao Chin Chen, Yen Kuang Yang, Jau-Shyong Hong, Ru-Band Lu
This corrects the article DOI: 10.1038/srep09708.
June 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28735039/frequency-and-correlates-of-sleep-disturbance-in-methadone-and-buprenorphine-maintained-patients
#18
Kelly E Dunn, Patrick H Finan, D Andrew Tompkins, Eric C Strain
BACKGROUND: Opioid use disorder (OUD) is a significant public health problem, and opioid maintenance treatment (OMT) on methadone or buprenorphine is a common approach. This study characterized sleep impairment in patients maintained on methadone or buprenorphine, and evaluated its association with psychiatric and medical comorbidities. METHODS: Participants (N=185) maintained on methadone (N=125) or buprenorphine (N=60) for OUD completed the Medical Outcomes Study Sleep Scale (MOS) to provide a point-prevalence assessment of sleep impairment...
July 14, 2017: Addictive Behaviors
https://www.readbyqxmd.com/read/28733101/patterns-of-physician-prescribing-for-opioid-maintenance-treatment-in-ontario-canada-in-2014
#19
Qi Guan, Wayne Khuu, Sheryl Spithoff, Tara Kiran, Meldon Kahan, Mina Tadrous, Diana Martins, Pamela Leece, Tara Gomes
BACKGROUND: Despite concerns surrounding high patient volumes in methadone clinics, little is known about the practice patterns of opioid maintenance therapy (OMT) providers in Ontario. We examined the distribution of these services and how physician characteristics differ based on prescribing volume. METHODS: We conducted a cross-sectional study among prescribers of methadone or buprenorphine to Ontario public drug beneficiaries in 2014 by stratifying physicians into low- (lower 50%), moderate- (51-89%) and high-volume (top 10%) prescribers...
August 1, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28723731/combined-effect-of-cyp2b6-genotype-and-other-candidate-genes-on-a-steady-state-serum-concentration-of-methadone-in-opioid-maintenance-treatment
#20
Marianne K Kringen, Fatemeh Chalabianloo, Jean-Paul Bernard, Jørgen G Bramness, Espen Molden, Gudrun Høiseth
BACKGROUND: A considerable interindividual variability in methadone pharmacokinetics is seen in patients on methadone maintenance treatment. The aim of this study was to clarify the impact of the reduced function CYP2B6*6 variant allele together with variants in other candidate genes on a steady-state methadone concentration in a naturalistic setting. METHODS: Information of methadone serum concentration, dose, age, sex, and CYP2C9, CYP2C19, and CYP2D6 genotypes were collected from a routine therapeutic drug monitoring database, whereas variant alleles in CYP2B6 and CYP3A5 were retrospectively genotyped...
October 2017: Therapeutic Drug Monitoring
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