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Opioid withdrawal

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https://www.readbyqxmd.com/read/29447951/suction-electrode-recording-in-locus-coeruleus-of-newborn-rat-brain-slices-reveals-network-bursting-comprising-summated-non-synchronous-spiking
#1
Vladimir Rancic, Bijal Rawal, Bogdan Panaitescu, Araya Ruangkittisakul, Klaus Ballanyi
The brainstem locus coeruleus (LC) controling behaviors like arousal, sleep, breathing, pain or opioid withdrawal is an established model for spontaneous action potential synchronization. Such synchronous 'spiking' might produce an extracellular field potential (FP) which is a crucial tool for neural network analyses. We found using ≥10 μm tip diameter suction electrodes in newborn rat brainstem slices that the LC generates at ∼1 Hz a robust rhythmic FP (rFP). During distinct rFP phases, LC neurons discharge with a jitter of ±33 ms single spikes that summate to a ∼200 ms-lasting population burst...
February 12, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29447416/managing-opioid-use-disorder-and-co-occurring-posttraumatic-stress-disorder-among-veterans
#2
Rhonda Snow, Stephanie T Wynn
Support and safety measures are essential for Veterans admitted to acute psychiatric units with co-occurring posttraumatic stress disorder (PTSD) and opioid use disorder (OUD) to avoid unpleasant withdrawal symptoms. A human patient simulator was used to train clinicians to recognize opioid withdrawal symptoms. Clinicians were educated to assess for opioid withdrawal symptoms using the Clinical Opiate Withdrawal Scale. Knowledge was evaluated via pre/posttest. All participants' (N = 12) posttest scores improved...
February 15, 2018: Journal of Psychosocial Nursing and Mental Health Services
https://www.readbyqxmd.com/read/29445295/the-effect-of-exercise-frequency-on-neuropathic-pain-and-pain-related-cellular-reactions-in-the-spinal-cord-and-midbrain-in-a-rat-sciatic-nerve-injury-model
#3
Megumi Sumizono, Harutoshi Sakakima, Shotaro Otsuka, Takuto Terashi, Kazuki Nakanishi, Koki Ueda, Seiya Takada, Kiyoshi Kikuchi
Background: Exercise regimens are established methods that can relieve neuropathic pain. However, the relationship between frequency and intensity of exercise and multiple cellular responses of exercise-induced alleviation of neuropathic pain is still unclear. We examined the influence of exercise frequency on neuropathic pain and the intracellular responses in a sciatic nerve chronic constriction injury (CCI) model. Materials and methods: Rats were assigned to four groups as follows: CCI and high-frequency exercise (HFE group), CCI and low-frequency exercise (LFE group), CCI and no exercise (No-Ex group), and naive animals (control group)...
2018: Journal of Pain Research
https://www.readbyqxmd.com/read/29443860/a-novel-rat-model-of-extremity-trauma-for-pre-hospital-pain-management-research
#4
Lusha Xiang, Harold G Klemcke, Nathan A Wienandt, Kathy L Ryan, Carmen Hinojosa-Laborde
BACKGROUND: Pain management is important in pre-hospital care of patients with extremity trauma (ET). The goal of this study was to establish a rat model of ET for pre-hospital pain research, and validate it using pain behaviors and analgesics. METHODS: Rats were anesthetized using isoflurane and ET was induced in one hindlimb via clamping retrofemoral tissues for 30 sec, followed by closed fibula fracture. Rats regained consciousness after ET. Pain responses in the injured hindlimb to thermal hyperalgesia (paw withdrawal latency, PWL), mechanical allodynia (paw withdrawal pressure, PWP), and weight bearing (WB) were determined before and 90 minutes after ET...
February 14, 2018: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/29439284/reply-to-necessity-for-interrupted-time-series-to-analyze-the-effects-of-propoxyphene-withdrawal-from-the-market-and-further-health-outcome-trend-estimates
#5
Fenglong Xie, Lang Chen, Huifeng Yun, Jeffrey R Curtis
We appreciate the interest in our work and the opportunity to respond to the comments by Dr. Yoo et al. regarding our article on "Changing trends in opioid use among patients with rheumatoid arthritis in the United States" This article is protected by copyright. All rights reserved.
February 13, 2018: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/29433586/a-case-report-of-clonidine-induced-syncope-a-review-of-central-actions-of-an-old-cardiovascular-drug
#6
Alexander J Sandweiss, Christopher M Morrison, Anne Spichler, John Rozich
BACKGROUND: Clonidine is an imidazoline sympatholytic, acting on both α 2 -adrenergic and imidazoline receptors in the brainstem to induce antihypertensive and negative chronotropic effects in the vasculature and heart respectively. CASE PRESENTATION: A 69-year-old gentleman with hypertension presented to the emergency department after multiple syncopal episodes over the past 12 months. Electrocardiogram demonstrated sinus bradycardia with a heart rate of 42 beats per minute...
February 13, 2018: BMC Pharmacology & Toxicology
https://www.readbyqxmd.com/read/29419653/long-term-use-of-naldemedine-in-the-treatment-of-opioid-induced-constipation-in-patients-with-chronic-non-cancer-pain-a-randomized-double-blind-placebo-controlled-phase-3-study
#7
Lynn R Webster, Srinivas Nalamachu, Bart Morlion, Jyotsna Reddy, Yuko Baba, Tadaaki Yamada, Juan Camilo Arjona Ferreira
The long-term safety of naldemedine, a peripherally acting µ-opioid receptor antagonist, was evaluated in patients with opioid-induced constipation and chronic non-cancer pain in a 52-week, randomized, double-blind, phase 3 study. Eligible adults who could be on a routine laxative regimen were randomized 1:1 to receive once-daily oral naldemedine 0.2 mg (n = 623) or placebo (n = 623). The primary endpoint was summary measures of treatment-emergent adverse events (AEs). Additional endpoints included opioid withdrawal on the Clinical Opiate Withdrawal Scale and the Subjective Opiate Withdrawal Scale, pain intensity on Numeric Rating Scale, frequency of bowel movements, and constipation-related symptoms and quality of life on the Patient Assessment of Constipation Symptoms and Patient Assessment of Constipation Quality of Life scales, respectively...
February 6, 2018: Pain
https://www.readbyqxmd.com/read/29417369/mental-health-of-mothers-of-infants-with-neonatal-abstinence-syndrome-and-prenatal-opioid-exposure
#8
Laura J Faherty, Meredith Matone, Molly Passarella, Scott Lorch
BACKGROUND: The prevalence of opioid use during pregnancy is increasing. Two downstream effects are neonatal abstinence syndrome (NAS), a postnatal withdrawal syndrome, and long-term prenatal opioid exposure (LTPOE) without documented withdrawal symptoms in the infant. Mental health characteristics of mothers of infants with NAS and LTPOE have not been described. METHODS: Using linked maternal and infant Medicaid claims and birth certificate data, we analyzed 15,571 infants born to Medicaid-insured women 15-24 years old in a mid-Atlantic city from 2007 to 2010...
February 7, 2018: Maternal and Child Health Journal
https://www.readbyqxmd.com/read/29415856/a-qualitative-assessment-of-attitudes-about-and-preferences-for-extended-release-naltrexone-a-new-pharmacotherapy-to-treat-opioid-use-disorders-in-ukraine
#9
Ruthanne Marcus, Martha J Bojko, Alyona Mazhnaya, Iuliia Makarenko, Sergii Filippovych, Sergii Dvoriak, Frederick L Altice, Sandra A Springer
Numerous individual barriers, including negative attitudes toward opioid agonist therapies (OAT), have undermined HIV prevention efforts in Ukraine where the epidemic is concentrated in people who inject drugs (PWID). The recent availability of extended-release naltrexone (XR-NTX), an opioid antagonist, provides new opportunities for treatment and prevention, but little is known about patient preferences. We conducted qualitative analysis using focus groups (FG) of PWID recruited based on OAT experience: currently, previously, and never on OAT in five Ukrainian cities...
March 2018: Journal of Substance Abuse Treatment
https://www.readbyqxmd.com/read/29415853/expected-and-actual-fentanyl-exposure-among-persons-seeking-opioid-withdrawal-management
#10
Shannon R Kenney, Bradley J Anderson, Micah T Conti, Genie L Bailey, Michael D Stein
OBJECTIVE: Fentanyl-contaminated opioid supplies have led to rising overdose fatalities in recent years. We compared beliefs, behaviors, and risk perceptions related to fentanyl with actual toxicology reports among people who used opioids. METHOD: Participants (n=231) were patients undergoing short-term inpatient opioid withdrawal management in Fall River, Massachusetts. We compared persons testing positive and negative for fentanyl on urine toxicological testing at program entry...
March 2018: Journal of Substance Abuse Treatment
https://www.readbyqxmd.com/read/29402680/a-randomized-open-label-trial-of-methadone-continuation-versus-forced-withdrawal-in-a-combined-us-prison-and-jail-findings-at-12-months-post-release
#11
Lauren Brinkley-Rubinstein, Michelle McKenzie, Alexandria Macmadu, Sarah Larney, Nickolas Zaller, Emily Dauria, Josiah Rich
Recently, incarcerated individuals are at increased risk of opioid overdose. Methadone maintenance treatment (MMT) is an effective way to address opioid use disorder and prevent overdose; however, few jails and prisons in the United States initiate or continue people who are incarcerated on MMT. In the current study, the 12 month outcomes of a randomized control trial in which individuals were provided MMT while incarcerated at the Rhode Island Department of Corrections (RIDOC) are assessed. An as-treated analysis included a total of 179 participants-128 who were, and 51 who were not, dosed with methadone the day before they were released from the RIDOC...
January 31, 2018: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/29398401/functional-neurocircuits-and-neuroimaging-biomarkers-of-tobacco-use-disorder
#12
REVIEW
Matthew T Sutherland, Elliot A Stein
Drug abuse and addiction remain major public health issues, exemplified by the opioid epidemic currently devastating the United States. Treatment outcomes across substance use disorders remain unacceptably poor, wherein drug discovery/development for this multifaceted neuropsychiatric disorder focuses on single molecular-level targets. Rather, our opinion is that a systems-level neuroimaging perspective is crucial for identifying novel therapeutic targets, biomarkers to stratify patients, and individualized treatment strategies...
February 2, 2018: Trends in Molecular Medicine
https://www.readbyqxmd.com/read/29397646/scientific-evidence-for-the-addictiveness-of-tobacco-and-smoking-cessation-in-tobacco-litigation
#13
Sungwon Roh
Smokers keep smoking despite knowing that tobacco claims many lives, including their own and others'. What makes it hard for them to quit smoking nonetheless? Tobacco companies insist that smokers choose to smoke, according to their right to self-determination. Moreover, they insist that with motivation and willpower to quit smoking, smokers can easily stop smoking. Against this backdrop, this paper aims to discuss the addictive disease called tobacco use disorder, with an assessment of the addictiveness of tobacco and the reasons why smoking cessation is challenging, based on neuroscientific research...
January 2018: Journal of Preventive Medicine and Public Health, Yebang Ŭihakhoe Chi
https://www.readbyqxmd.com/read/29391826/spotlight-on-naldemedine-in-the-treatment-of-opioid-induced-constipation-in-adult-patients-with-chronic-noncancer-pain-design-development-and-place-in-therapy
#14
REVIEW
Emily K Stern, Darren M Brenner
Opioid-induced constipation (OIC) is an increasingly prevalent problem in the USA due to the growing use of opioids. A novel class of therapeutics, the peripherally acting μ-opioid receptor antagonists (PAMORAs), has been developed to mitigate the deleterious effects of opioids in the gastrointestinal tract while maintaining central analgesia and minimizing opioid withdrawal. This review aimed to summarize the literature on naldemedine, the third PAMORA to gain US Food and Drug Administration (FDA) approval for the treatment of OIC in adults with chronic noncancer pain-related syndromes...
2018: Journal of Pain Research
https://www.readbyqxmd.com/read/29389213/tobacco-withdrawal-among-opioid-dependent-smokers
#15
Joanna M Streck, Sarah H Heil, Stephen T Higgins, Janice Y Bunn, Stacey C Sigmon
Prevalence of cigarette smoking among opioid-dependent individuals is 6-fold that of the general U.S. adult population and their quit rates are notoriously poor. One possible reason for the modest cessation outcomes in opioid-dependent smokers may be that they experience more severe tobacco withdrawal upon quitting. In this secondary analysis, we evaluated tobacco withdrawal in opioid-dependent (OD) smokers versus smokers without co-occurring substance use disorders (SUDs). Participants were 47 methadone- or buprenorphine-maintained smokers and 25 non-SUD smokers who completed 1 of several 2-week studies involving daily visits for biochemical monitoring, delivery of financial incentives contingent on smoking abstinence, and assessment of withdrawal via the Minnesota Nicotine Withdrawal Scale (MNWS)...
February 1, 2018: Experimental and Clinical Psychopharmacology
https://www.readbyqxmd.com/read/29383684/dynorphin-and-%C3%AE%C2%BA-opioid-receptor-dysregulation-in-the-dopaminergic-reward-system-of-human-alcoholics
#16
Igor Bazov, Daniil Sarkisyan, Olga Kononenko, Hiroyuki Watanabe, Tatiana Yakovleva, Anita C Hansson, Wolfgang H Sommer, Rainer Spanagel, Georgy Bakalkin
Molecular changes induced by excessive alcohol consumption may underlie formation of dysphoric state during acute and protracted alcohol withdrawal which leads to craving and relapse. A main molecular addiction hypothesis is that the upregulation of the dynorphin (DYN)/κ-opioid receptor (KOR) system in the nucleus accumbens (NAc) of alcohol-dependent individuals causes the imbalance in activity of D1- and D2 dopamine receptor (DR) expressing neural circuits that results in dysphoria. We here analyzed post-mortem NAc samples of human alcoholics to assess changes in prodynorphin (PDYN) and KOR (OPRK1) gene expression and co-expression (transcriptionally coordinated) patterns...
January 30, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29378623/patient-perspectives-of-transitioning-from-prescription-opioids-to-heroin-and-the-role-of-route-of-administration
#17
Laura B Monico, Shannon Gwin Mitchell
BACKGROUND: As the availability of prescription opioids decreases and the availability of heroin increases, some prescription opioid users are transitioning to heroin. This study seeks to explore factors associated with respondents' transition from prescription opioid use to heroin. METHODS: In-depth, semi-structured qualitative interviews (n = 20) were conducted with buprenorphine patients in an opioid treatment program. Respondents were predominantly White (n = 13) and male (n = 13), with a range of treatment tenure (4 days to 2 years)...
January 29, 2018: Substance Abuse Treatment, Prevention, and Policy
https://www.readbyqxmd.com/read/29378294/morphine-antinociception-on-thermal-sensitivity-and-place-conditioning-in-male-and-female-rats-treated-with-intraplantar-complete-freund-s-adjuvant
#18
Alexander Armendariz, Arbi Nazarian
The experience of pain is characterized by the presence of a noxious sensory stimulus combined with negative affect, which is often treated clinically through administration of drugs such as morphine or other opioids. This study investigated the effects of morphine one and seven days after intraplantar administration of complete freund's adjuvant (CFA) in male and female rats. Hargreaves test for thermal nociception and conditioned place preference (CPP) were performed following subcutaneous administration of saline or morphine (1...
January 25, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29352503/in-vivo-effects-of-%C3%AE-opioid-receptor-agonist-%C3%AE-opioid-receptor-antagonist-peptidomimetics-following-acute-and-repeated-administration
#19
Jessica P Anand, Kelsey E Kochan, Anthony F Nastase, Deanna Montgomery, Nicholas W Griggs, John R Traynor, Henry I Mosberg, Emily M Jutkiewicz
BACKGROUND AND PURPOSE: Mu opioid receptor (μ-receptor) agonists are used for pain management, but produce adverse effects including tolerance, dependence, and euphoria. The co-administration of a μ-receptor agonist with a delta opioid receptor (δ-receptor) antagonist has been shown to produce antinociception with reduced development of some side effects. We characterized the effects of three μ-receptor agonist/δ-receptor antagonist peptidomimetics in vivo after acute and repeated administration to determine if this profile provides a viable alternative to traditional opioid analgesics...
January 19, 2018: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29330156/application-of-receptor-theory-to-the-design-and-use-of-fixed-proportion-mu-opioid-agonist-and-antagonist-mixtures-in-rhesus-monkeys
#20
Jeremy C Cornelissen, Samuel Obeng, Kenner C Rice, Yan Zhang, S Stevens Negus, Matthew Banks
Receptor theory predicts that fixed-proportion mixtures of a competitive, reversible agonist (e.g. fentanyl) and antagonist (e.g. naltrexone) at a common receptor (e.g. mu opioid receptors; MOR) will result in antagonist proportion-dependent decreases in apparent efficacy of the mixtures and downward shifts in mixture dose-effect functions. The present study tested this hypothesis by evaluating behavioral effects of fixed-proportion fentanyl/naltrexone mixtures in a warm-water tail-withdrawal procedure in rhesus monkeys (n=4)...
January 12, 2018: Journal of Pharmacology and Experimental Therapeutics
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