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therapeutic uses of morphine

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https://www.readbyqxmd.com/read/28060227/preoperative-opioid-use-is-associated-with-early-revision-after-total-knee-arthroplasty-a-study-of-male-patients-treated-in-the-veterans-affairs-system
#1
Alon Ben-Ari, Howard Chansky, Irene Rozet
BACKGROUND: Opioid use is endemic in the U.S. and is associated with morbidity and mortality. The impact of long-term opioid use on joint-replacement outcomes remains unknown. We tested the hypothesis that use of opioids is associated with adverse outcomes after total knee arthroplasty (TKA). METHODS: We performed a retrospective analysis of patients who had had TKA within the U.S. Veterans Affairs (VA) system over a 6-year period and had been followed for 1 year postoperatively...
January 4, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28059434/assessment-of-abuse-liability-of-tramadol-among-experienced-drug-users-double-blind-crossover-randomized-controlled-trial
#2
Mrinmay Das, Raka Jain, Anju Dhawan, Amandeep Kaur
BACKGROUND: Tramadol is a widely used opioid analgesic. Different preclinical, clinical, and postmarketing surveillance studies show conflicting results regarding abuse potential of this drug. METHODS: A randomized double-blind complete crossover study was conducted at National Drug Dependence Treatment Centre, All India Institute of Medical Sciences, New Delhi. Total subjects were 10, comprising total 120 observations (each subject assessed at baseline, 5, 45, and 240 minutes)...
November 2016: Journal of Opioid Management
https://www.readbyqxmd.com/read/28038985/exploring-the-mechanism-by-which-accumbal-deep-brain-stimulation-attenuates-morphine-induced-reinstatement-through-manganese-enhanced-mri-and-pharmacological-intervention
#3
Lei Zhang, Ying Cui, Ying-Chun Wang, Hong Yin, Jian-Min Zheng, Lu Huang, Zhen-Wei Zhao, Jiang Li
Deep brain stimulation (DBS) of the nucleus accumbens (NAc) has been applied to attenuate drug relapses in animal studies and clinical treatments. However, the mechanisms by which DBS produces its therapeutic effects remain largely unknown. This study is the first to combine manganese-enhanced magnetic resonance imaging (MRI) with DBS to explore the effects of accumbal DBS on the relapse pathway of rats. The images suggested that DBS produced an antidromic activation of the cortico-accumbal afferents. To verify the activating effects of DBS, the expression levels of the protein encoded by the immediate early gene c-Fos following DBS were measured using immunochemical methods...
December 27, 2016: Experimental Neurology
https://www.readbyqxmd.com/read/28035588/clinical-pharmacokinetics-and-pharmacodynamics-of-naloxegol-a-peripherally-acting-%C3%A2%C2%B5-opioid-receptor-antagonist
#4
REVIEW
Khanh Bui, Diansong Zhou, Hongmei Xu, Eike Floettmann, Nidal Al-Huniti
Naloxegol is a peripherally acting µ-opioid receptor antagonist approved for use as an orally administered tablet (therapeutic doses of 12.5 and 25 mg) for the treatment of opioid-induced constipation. Over a wide dose range (i.e. single supratherapeutic doses up to 1000 mg in healthy volunteers), the pharmacokinetic properties of naloxegol appear to be time- and dose-independent. Naloxegol is rapidly absorbed, with mean time to maximum plasma concentration of <2 h. Following once-daily administration, steady state is achieved within 2-3 days and minimal accumulation is observed...
December 29, 2016: Clinical Pharmacokinetics
https://www.readbyqxmd.com/read/28013351/differential-effects-of-aprepitant-a-clinically-used-neurokinin-1-receptor-antagonist-on-the-expression-of-conditioned-psychostimulant-versus-opioid-reward
#5
Padmanabhan Mannangatti, Santhanalakshmi Sundaramurthy, Sammanda Ramamoorthy, Lankupalle D Jayanthi
RATIONALE: Neurokinin-1 receptor (NK1R) signaling modulates behaviors associated with psychostimulants and opioids. Psychostimulants, such as amphetamine (AMPH) and cocaine, bind to monoamine transporters and alter their functions. Both dopamine and norepinephrine transporters are regulated by NK1R activation suggesting a role for NK1R mediated catecholamine transporter regulation in psychostimulant-mediated behaviors. OBJECTIVES: The effect of in vivo administration of aprepitant (10 mg/kg) on the expression of AMPH (0...
December 24, 2016: Psychopharmacology
https://www.readbyqxmd.com/read/27964861/pain-opioids-and-sleep-implications-for-restless-legs-syndrome-treatment
#6
Claudia Trenkwalder, Walter Zieglgänsberger, Sam H Ahmedzai, Birgit Högl
Opioid receptor agonists are known to relieve restless legs syndrome (RLS) symptoms, including both sensory and motor events, as well as improving sleep. The mechanisms of action of opioids in RLS are still a matter of speculation. The mechanisms by which endogenous opioids contribute to the pathophysiology of this polygenetic disorder, in which there are a number of variants, including developmental factors, remains unknown. A summary of the cellular mode of action of morphine and its (partial) antagonist naloxone via α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptors and the involvement of dendritic spine activation is described...
November 5, 2016: Sleep Medicine
https://www.readbyqxmd.com/read/27917339/morphine-versus-methylprednisolone-or-aminophylline-for-relieving-dyspnea-in-patients-with-advanced-cancer-in-china-a-retrospective-study
#7
Cong Tian, Jiong-Yi Wang, Mei-Ling Wang, Bin Jiang, Lu-Lu Zhang, Feng Liu
CONTEXT: Dyspnea is one of the most common and distressing symptoms that occurs in terminal cancer patients. However, there are no existing treatment guidelines for this condition in China. OBJECTIVE: This single-center, retrospective, observational study aimed to compare the efficacy of using morphine, methylprednisolone, or aminophylline to relieve the symptom of breathlessness in patients with advanced malignant tumors and to investigate the safety of these regimens during the treatment of dyspnea...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27914629/cytoplasmic-fmr1-interacting-protein-2-is-a-major-genetic-factor-underlying-binge-eating
#8
Stacey L Kirkpatrick, Lisa R Goldberg, Neema Yazdani, R Keith Babbs, Jiayi Wu, Eric R Reed, David F Jenkins, Amanda F Bolgioni, Kelsey I Landaverde, Kimberly P Luttik, Karen S Mitchell, Vivek Kumar, W Evan Johnson, Megan K Mulligan, Pietro Cottone, Camron D Bryant
BACKGROUND: Eating disorders are lethal and heritable; however, the underlying genetic factors are unknown. Binge eating is a highly heritable trait associated with eating disorders that is comorbid with mood and substance use disorders. Therefore, understanding its genetic basis will inform therapeutic development that could improve several comorbid neuropsychiatric conditions. METHODS: We assessed binge eating in closely related C57BL/6 mouse substrains and in an F2 cross to identify quantitative trait loci associated with binge eating...
October 25, 2016: Biological Psychiatry
https://www.readbyqxmd.com/read/27902847/food-deprivation-facilitates-reinstatement-of-morphine-induced-conditioned-place-preference-role-of-intra-accumbal-dopamine-d2-like-receptors-in-associating-reinstatement-of-morphine-cpp-with-stress
#9
Fatemeh Sadeghzadeh, Vahab Babapour, Abbas Haghparast
The high rate of relapse to drug use is one of the main problems in the treatment of addiction. Stress plays the essential role in drug abuse and relapse; nevertheless, little is known about the mechanisms underlying stress and relapse. Accordingly, the effects of intra-accumbal administration of Sulpiride, as a dopamine D2-like receptor antagonist, on an ineffective morphine dose+food deprivation(FD)- and morphine priming-induced reinstatement of conditioned place preference (CPP). 104 adult male albino Wistar rats weighing 200-280g were bilaterally implanted by cannula into the nucleus accumbens (NAc)...
November 30, 2016: Synapse
https://www.readbyqxmd.com/read/27900785/a-tryptoline-ring-distortion-strategy-leads-to-complex-and-diverse-biologically-active-molecules-from-the-indole-alkaloid-yohimbine
#10
Nicholas Paciaroni, Ranjala Ratnayake, James Matthews, Verrill Norwood, Austin Arnold, Long Dang, Hendrik Luesch, Robert William Huigens Iii
High-throughput screening (HTS) is the primary driver to current drug discovery efforts. New therapeutic agents that enter the market are a direct reflection of the structurally simple compounds that make up screening libraries. Unlike medically relevant natural products (e.g., morphine), small molecules currently being screened have low fraction sp3 character and few, if any, stereogenic centers. Although simple compounds have been useful in drugging certain biological targets (e.g., protein kinases), more sophisticated targets (e...
November 29, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27895265/gut-homeostasis-microbial-dysbiosis-and-opioids
#11
Fuyuan Wang, Sabita Roy
Gut homeostasis plays an important role in maintaining animal and human health. The disruption of gut homeostasis has been shown to be associated with multiple diseases. The mutually beneficial relationship between the gut microbiota and the host has been demonstrated to maintain homeostasis of the mucosal immunity and preserve the integrity of the gut epithelial barrier. Currently, rapid progress in the understanding of the host-microbial interaction has redefined toxicological pathology of opioids and their pharmacokinetics...
November 28, 2016: Toxicologic Pathology
https://www.readbyqxmd.com/read/27890603/a-novel-inhibitor-of-endocannabinoid-catabolic-enzymes-sheds-light-on-behind-the-scene-interplay-between-chronic-pain-analgesic-tolerance-and-heroin-dependence
#12
Josée Guindon
From the Aristotelian ancient Greece, pain has been associated with appetites or emotions and is opposite to pleasure. Reward and addiction is also linked to pleasure and compulsive drug seeking reinstates pleasure. Alleviation of chronic pain can induce a euphoric phase similar to what is found in addiction. Both chronic pain and addiction are recognized as a disease of the central nervous system. They share many characteristics and brain regions/mechanisms. Evidence points to the usefulness of cannabinoids as a new class of agents to add to the pharmaceutical toolbox in the management of chronic pain...
March 1, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/27752976/pharmacogenomics-and-pharmacogenetics-for-the-intensive-care-unit-a-narrative-review
#13
Meghan MacKenzie, Richard Hall
PURPOSE: Knowledge of how alterations in pharmacogenomics and pharmacogenetics may affect drug therapy in the intensive care unit (ICU) has received little study. We review the clinically relevant application of pharmacogenetics and pharmacogenomics to drugs and conditions encountered in the ICU. SOURCE: We selected relevant literature to illustrate the important concepts contained within. PRINCIPAL FINDINGS: Two main approaches have been used to identify genetic abnormalities - the candidate gene approach and the genome-wide approach...
January 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/27746699/morphine-dependence-is-attenuated-by-red-ginseng-extract-and-ginsenosides-rh2-rg3-and-compound-k
#14
Taddesse Yayeh, Kyunghwa Yun, Soyong Jang, Seikwan Oh
BACKGROUND: Red ginseng and ginsenosides have shown plethoric effects against various ailments. However, little is known regarding the effect of red ginseng on morphine-induced dependence and tolerance. We therefore investigated the effect of red ginseng extract (RGE) and biotransformed ginsenosides Rh2, Rg3, and compound K on morphine-induced dependence in mice and rats. METHODS: While mice were pretreated with RGE and then morphine was injected intraperitoneally, rats were infused with ginsenosides and morphine intracranially for 7 days...
October 2016: Journal of Ginseng Research
https://www.readbyqxmd.com/read/27744679/identification-of-the-first-marine-derived-opioid-receptor-balanced-agonist-with-a-signaling-profile-that-resembles-the-endorphins
#15
Tyler A Johnson, Laura Milan-Lobo, Tao Che, Madeline Ferwerda, Eptisam Lambo, Nicole L McIntosh, Fei Li, Li He, Nicholas Lorig-Roach, Phillip Crews, Jennifer Lynne Whistler
Opioid therapeutics are excellent analgesics, whose utility is compromised by dependence. Morphine (1) and its clinically relevant derivatives such as OxyContin® (4), Vicodin® (5) and Dilaudid® (6) are "biased" agonists at the µ opioid receptor (OR), wherein they engage G-protein signaling but poorly engage β-arrestin and the endocytic machinery. In contrast, the endorphins, met-enkephalin (14) and β-endorphin (15), endogenous peptide agonists for ORs, are more potent analgesics then 1, show reduced liability for tolerance and dependence, and engage both G-protein and β-arrestin pathways as "balanced" agonists...
October 17, 2016: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/27742411/inhibition-of-reinforcing-hyperalgesic-and-motor-effects-of-morphine-by-buspirone-in-rats
#16
Darakhshan Jabeen Haleem, Shazia Nawaz
: Morphine and other opioids are among the most effective prescription medications for the treatment of pain. Addiction and hyperalgesia associated with their long-term use limits the clinical utility of these drugs. In view of a role of somatodendritic serotonin-1A receptors in addiction and analgesic effects of morphine, the present study concerns effects of co-use of buspirone, a partial agonist at the serotonin-1A receptor, on reinforcing, hyperalgesic, and motor effects of morphine in rats...
January 2017: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/27734075/efficacy-of-prasugrel-administration-immediately-after-percutaneous-coronary-intervention-in-st-elevation-myocardial-infarction
#17
Ulrike Flierl, Florian Zauner, Jan-Thorben Sieweke, Christine Berliner, L Christian Napp, Jochen Tillmanns, Johann Bauersachs, Andreas Schäfer
Prasugrel, a potent thienopyridine, achieves stronger inhibition of platelet activation than clopidogrel. However, onset of inhibition is significantly delayed in patients with acute ST-elevation myocardial infarction (STEMI), as haemodynamic instability and morphine application seem to exhibit significant influence. Since rapid onset of effect was demonstrated in non-STEMI patients when prasugrel was administered only after percutaneous coronary intervention (PCI) without increasing cardiovascular event rates we assessed the efficacy of prasugrel loading immediately after PCI for STEMI instead of pre-loading before revascularisation...
October 13, 2016: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/27707973/t394a-mutation-at-the-%C3%AE-opioid-receptor-blocks-opioid-tolerance-and-increases-vulnerability-to-heroin-self-administration-in-mice
#18
Xiao-Fei Wang, Elisabeth Barbier, Yi-Ting Chiu, Yi He, Jia Zhan, Guo-Hua Bi, Hai-Ying Zhang, Bo Feng, Lee-Yuan Liu-Chen, Jia Bei Wang, Zheng-Xiong Xi
: The etiology and pathophysiology underlying opioid tolerance and dependence are still unknown. Because mu opioid receptor (MOR) plays an essential role in opioid action, many vulnerability-related studies have focused on single nucleotide polymorphisms of MOR, particularly on A118G. In this study, we found that a single-point mutation at the MOR T394 phosphorylation site could be another important susceptive factor in the development of opioid tolerance and dependence in mice. T394A mutation, in which a threonine at 394 was replaced by an alanine, did not alter agonist binding to MOR and opioid analgesia, but resulted in loss of etorphine-induced MOR internalization in spinal dorsal horn neurons and opioid analgesic tolerance induced by either morphine or etorphine...
October 5, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27685788/enhancement-of-orofacial-antinociceptive-effect-of-carvacrol-a-monoterpene-present-in-oregano-and-thyme-oils-by-%C3%AE-cyclodextrin-inclusion-complex-in-mice
#19
Juliane C Silva, Jackson R G S Almeida, Jullyana S S Quintans, Rajiv Gandhi Gopalsamy, Saravanan Shanmugam, Mairim Russo Serafini, Maria R C Oliveira, Bruno A F Silva, Anita O B P B Martins, Fyama F Castro, Irwin R A Menezes, Henrique D M Coutinho, Rita C M Oliveira, Parimelazhagan Thangaraj, Adriano A S Araújo, Lucindo J Quintans-Júnior
Orofacial pain is associated with diagnosis of chronic pain of head, face, mouth, neck and all the intraoral structures. Carvacrol, a naturally occurring isoprenoid with diverse class of biological activities including anti-inflammatory, analgesic, antitumor and antioxidant properties. Now, the antinociceptive effect was studied in mice pretreatment with carvacrol (CARV) and β-cyclodextrin complex containing carvacrol (CARV-βCD) in formalin-, capsaicin-, and glutamate- induced orofacial nociception. Mice were pretreated with vehicle (0...
December 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27676680/intrathecal-bupivacaine-monotherapy-with-a-retrograde-catheter-for-the-management-of-complex-regional-pain-syndrome-of-the-lower-extremity
#20
W Porter McRoberts, Catalina Apostol, Abdul Haleem
UNLABELLED: Complex regional pain syndrome (CRPS) presents a therapeutic challenge due to its many presentations and multifaceted pathophysiology. There is no approved treatment algorithm and clinical interventions are often applied empirically. In cases of CRPS where symptoms are localized to an extremity, a targeted treatment is indicated. We describe the use of intrathecal bupivacaine monotherapy, delivered through a retrograde catheter, in the treatment of CRPS affecting the lower extremity...
September 2016: Pain Physician
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