keyword
MENU ▼
Read by QxMD icon Read
search

opioid genetics

keyword
https://www.readbyqxmd.com/read/28425121/role-of-the-dynorphin-kappa-opioid-receptor-system-in-the-motivational-effects-of-ethanol
#1
Rachel I Anderson, Howard C Becker
Evidence has demonstrated that dynorphin (DYN) and the kappa opioid receptor (KOR) system contribute to various psychiatric disorders, including anxiety, depression, and addiction. More recently, this endogenous opioid system has received increased attention as a potential therapeutic target for treating alcohol use disorders. In this review, we provide an overview and synthesis of preclinical studies examining the influence of alcohol (ethanol) exposure on DYN/KOR expression and function, as well as studies examining the effects of DYN/KOR manipulation on ethanol's rewarding and aversive properties...
April 20, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28415063/neuron-restrictive-silencer-factor-mediated-downregulation-of-%C3%AE-opioid-receptor-contributes-to-the-reduced-morphine-analgesia-in-bone-cancer-pain
#2
Chao Zhu, Jun Tang, Tan Ding, Lei Chen, Wei Wang, Xiao-Peng Mei, Xiao-Tao He, Wen Wang, Li-Dong Zhang, Yu-Lin Dong, Zhuo-Jing Luo
Bone cancer pain has been reported to have unique mechanisms and is resistant to morphine treatment. Recent studies have indicated that neuron-restrictive silencer factor (NRSF) plays a crucial role in modulating the expression of the μ-opioid receptor (MOR) gene. The present study elucidates the regulatory mechanisms of MOR and its ability to affect bone cancer pain. Using a sarcoma-inoculated murine model, pain behaviors that represent continuous or breakthrough pain were evaluated. Expression of NRSF in the dorsal root ganglion (DRG) and spinal dorsal horn was quantified at the transcriptional and translational levels, respectively...
May 2017: Pain
https://www.readbyqxmd.com/read/28409480/genetic-testing-for-opioid-pain-management-a-primer
#3
Deepti Agarwal, Mercy A Udoji, Andrea Trescot
Patients see their primary care physicians (PCPs) for a variety of medical conditions, chronic pain being one of the most common. An increased use of prescription medications (especially opioids) has led to an increase in adverse drug reactions and has heightened our awareness of the variability in response to medications. Opioids and other pain adjuvants are widely used, and drug-drug interactions involving these analgesics can be problematic and potentially lethal. Pharmacogenetics has improved our understanding of drug efficacy and response, opened doors to individual tailoring of medical management, and created a series of ethical and economic considerations...
April 13, 2017: Pain and Therapy
https://www.readbyqxmd.com/read/28379874/effects-of-single-nucleotide-polymorphisms-on-surgical-and-post-surgical-opioid-requirements-a-systematic-review-and-meta-analysis
#4
Siu-Wai Choi, David M H Lam, Stanley S C Wong, Haydn H C Shiu, Amy X M Wang, Chi-Wai Cheung
OBJECTIVES: There is great heterogeneity in the way individuals respond to medications. Inherited differences, such as Single Nucleotide Polymorphisms (SNP), can influence the efficacy and toxicity of drugs. This meta-analysis aims to collate data from studies investigating the effect of SNPs on post-operative and/or intra-operative opioid requirements. METHODS: This meta-analysis was conducted following PRISMA guidelines. Eligibility criteria for studies in this meta-analysis were reporting amount of post-operative and/or intra-operative opioid used as the primary outcome and genotyping patients for SNPs in one of the following genes; OPRM1, CYP2D6, CYP3A4, CYP3A5, COMT, UGT2B7 or ABCB1...
April 4, 2017: Clinical Journal of Pain
https://www.readbyqxmd.com/read/28374016/divergent-modulation-of-nociception-by-glutamatergic-and-gabaergic-neuronal-subpopulations-in-the-periaqueductal-gray
#5
Vijay K Samineni, Jose G Grajales-Reyes, Bryan A Copits, Daniel E O'Brien, Sarah L Trigg, Adrian M Gomez, Michael R Bruchas, Robert W Gereau
The ventrolateral periaqueductal gray (vlPAG) constitutes a major descending pain modulatory system and is a crucial site for opioid-induced analgesia. A number of previous studies have demonstrated that glutamate and GABA play critical opposing roles in nociceptive processing in the vlPAG. It has been suggested that glutamatergic neurotransmission exerts antinociceptive effects, whereas GABAergic neurotransmission exert pronociceptive effects on pain transmission, through descending pathways. The inability to exclusively manipulate subpopulations of neurons in the PAG has prevented direct testing of this hypothesis...
March 2017: ENeuro
https://www.readbyqxmd.com/read/28348379/genetic-evidence-for-role-of-integration-of-fast-and-slow-neurotransmission-in-schizophrenia
#6
A Devor, O A Andreassen, Y Wang, T Mäki-Marttunen, O B Smeland, C-C Fan, A J Schork, D Holland, W K Thompson, A Witoelar, C-H Chen, R S Desikan, L K McEvoy, S Djurovic, P Greengard, P Svenningsson, G T Einevoll, A M Dale
The most recent genome-wide association studies (GWAS) of schizophrenia (SCZ) identified hundreds of risk variants potentially implicated in the disease. Further, novel statistical methodology designed for polygenic architecture revealed more potential risk variants. This can provide a link between individual genetic factors and the mechanistic underpinnings of SCZ. Intriguingly, a large number of genes coding for ionotropic and metabotropic receptors for various neurotransmitters-glutamate, γ-aminobutyric acid (GABA), dopamine, serotonin, acetylcholine and opioids-and numerous ion channels were associated with SCZ...
March 28, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28347350/the-association-between-age-of-onset-of-opioid-use-and-comorbidity-among-opioid-dependent-patients-receiving-methadone-maintenance-therapy
#7
Leen Naji, Brittany Burns Dennis, Monica Bawor, Michael Varenbut, Jeff Daiter, Carolyn Plater, Guillaume Pare, David C Marsh, Andrew Worster, Dipika Desai, James MacKillop, Lehana Thabane, Zainab Samaan
BACKGROUND: Opioid use disorder (OUD) affects approximately 21.9 million people worldwide. This study aims to determine the association between age of onset of opioid use and comorbid disorders, both physical and psychiatric, in patients receiving methadone maintenance treatment (MMT) for OUD. Understanding this association may inform clinical practice about important prognostic factors of patients on MMT, enabling clinicians to identify high-risk patients. METHODS: This study includes data collected between June 2011 and August 2016 for the Genetics of Opioid Addiction research collaborative between McMaster University and the Canadian Addiction Treatment Centers...
March 28, 2017: Addiction Science & Clinical Practice
https://www.readbyqxmd.com/read/28343361/genetic-dissociation-of-morphine-analgesia-from-hyperalgesia-in-mice
#8
Gina F Marrone, Valerie Le Rouzic, Andras Varadi, Jin Xu, Anjali M Rajadhyaksha, Susruta Majumdar, Ying-Xian Pan, Gavril W Pasternak
RATIONALE: Morphine is the prototypic mu opioid, producing its analgesic actions through traditional 7 transmembrane domain (7TM) G-protein-coupled receptors generated by the mu opioid receptor gene (Oprm1). However, the Oprm1 gene undergoes extensive alternative splicing to yield three structurally distinct sets of splice variants. In addition to the full-length 7TM receptors, it produces a set of truncated variants comprised of only 6 transmembrane domains (6TM). OBJECTIVES: This study explored the relative contributions of 7TM and 6TM variants in a range of morphine actions...
March 25, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28339912/pharmacogenomics-and-patient-treatment-parameters-to-opioid-treatment-in-chronic-pain-a-focus-on-morphine-oxycodone-tramadol-and-fentanyl
#9
Renae A Lloyd, Elizabeth Hotham, Catherine Hall, Marie Williams, Vijayaprakash Suppiah
Objective. : Opioids are one of the most commonly prescribed medicines for chronic pain. However, their use for chronic pain has been controversial. The objective of this literature review was to identify the role of genetic polymorphisms on patient treatment parameters (opioid dose requirements, response, and adverse effects) for opioids used in malignant and nonmalignant chronic pain. The opioids that this review focuses on are codeine, morphine, oxycodone, tramadol, and fentanyl...
February 24, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28333316/convergent-balancing-selection-on-the-mu-opioid-receptor-in-primates
#10
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/28323671/codeine-and-opioid-metabolism-implications-and-alternatives-for-pediatric-pain-management
#11
Vidya Chidambaran, Senthilkumar Sadhasivam, Mohamed Mahmoud
PURPOSE OF REVIEW: Use of perioperative opioids for surgical pain management of children presents clinical challenges because of concerns of serious adverse effects including life-threatening respiratory depression. This is especially true for children with history of obstructive sleep apnea. This review will explore current knowledge of clinically relevant factors and genetic polymorphisms that affect opioid metabolism and postoperative outcomes in children. RECENT FINDINGS: Within the past several years, an increasing number of case reports have illustrated clinically important respiratory depression, anoxic brain injuries and even death among children receiving appropriate weight-based dosages of codeine and other opioids for analgesia at home setting particularly following tonsillectomy...
March 18, 2017: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/28298794/anesthetic-implications-in-a-child-with-crouzon-syndrome
#12
Ajeet Kumar, Nitika Goel, Chandni Sinha, Abhishek Singh
Crouzon syndrome (CS) is an autosomal dominant genetic disorder characterized by craniofacial dysostosis. Premature fusion of skull base leads to midfacial hypoplasia, shallow orbit, mandibular prognathism, overcrowding of upper teeth, high-arched palate, and upper airway obstruction. It is important for anesthesiologists managing such patients to recognize and avoid potential airway complications. Here, we present a case of a 10-year-old child with CS posted for ptosis correction surgery. Use of peripheral nerve blocks to cut down opioid requirement, inhalational induction, and maintenance are key aspects in successful management of such cases...
January 2017: Anesthesia, Essays and Researches
https://www.readbyqxmd.com/read/28284950/naloxone-exacerbates-memory-impairments-and-depressive-like-behavior-after-mild-traumatic-brain-injury-mtbi-in-mice-with-upregulated-opioid-system-activity
#13
Anna Lesniak, Pawel Leszczynski, Magdalena Bujalska-Zadrozny, Chaim G Pick, Mariusz Sacharczuk
The neuroprotective role of the endogenous opioid system in the pathophysiological sequelae of brain injury remains largely ambiguous. Noteworthy, almost no data is available on how its genetically determined activity influences the outcome of mild traumatic brain injury. Thus, the aim of our study was to examine the effect of opioid receptor blockage on cognitive impairments produced by mild traumatic brain injury in mice selectively bred for high (HA) and low (LA) swim-stress induced analgesia that show innate divergence in opioid system activity...
March 8, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28282362/gene-to-gene-interactions-regulate-endogenous-pain-modulation-in-fibromyalgia-patients-and-healthy-controls-antagonistic-effects-between-opioid-and-serotonin-related-genes
#14
Tour Jeanette, Löfgren Monika, Mannerkorpi Kaisa, Gerdle Björn, Larsson Anette, Palstam Annie, Bileviciute-Ljungar Indre, Bjersing Jan, Ingvar Martin, Ernberg Malin, Schalling Martin, Kosek Eva
Chronic pain is associated with dysfunctional endogenous pain modulation, involving both central opioid and serotonergic (5-HT) signaling. Fibromyalgia (FM) is a chronic pain syndrome, characterized by widespread musculoskeletal pain and reduced exercise-induced hypoalgesia (EIH). In this study, we assessed the effects of three functional genetic polymorphisms on EIH in 130 patients with FM and 132 healthy controls (HC). Subjects were genotyped regarding the mu-opioid receptor (OPRM1) gene (rs1799971), the serotonin transporter (5-HTT) gene (5-HTTLPR/rs25531) and the serotonin-1a receptor (5-HT1a) gene (rs6296)...
March 7, 2017: Pain
https://www.readbyqxmd.com/read/28273335/a-cis-eqtl-in-oprm1-is-associated-with-subjective-response-to-alcohol-and-alcohol-use
#15
Jacqueline M Otto, Ian R Gizer, Joseph D Deak, Kimberly A Fleming, Bruce D Bartholow
BACKGROUND: A functional polymorphism within the mu-opioid receptor (OPRM1) gene, rs1799971 (A118G), previously has been associated with measures of alcohol use and sensitivity to its effects, but findings have been inconclusive. A recent study suggested that a second nearby variant within OPRM1, rs3778150, is robustly associated with heroin dependence, and fully explained a smaller observed association with rs1799971. Given evidence that the rs3778150-C allele is associated with decreased OPRM1 expression levels in the human brain, the current study sought to test the hypothesis that rs3778150 represents a causal variant within OPRM1 that increases risk for a variety of alcohol use phenotypes...
March 8, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28263461/current-concepts-in-methadone-metabolism-and-transport
#16
Evan D Kharasch
Methadone is a cornerstone therapy for opioid addiction and a public health strategy for HIV/AIDS and hepatitis C reduction. Methadone is also used for acute and chronic pain. As use for chronic pain has grown, so too have adverse events. Constitutive and acquired (drug interactions) inter- and intraindividual variability in methadone pharmacokinetics and pharmacodynamics confounds reliable clinical use. Identification of enzymes and transporters responsible for methadone disposition has been a long-sought ideal...
March 2017: Clinical Pharmacology in Drug Development
https://www.readbyqxmd.com/read/28241234/laparoscopic-total-pancreatectomy-with-islet-autotransplantation-and-intraoperative-islet-separation-as-a-treatment-for-patients-with-chronic-pancreatitis
#17
Caleb J Fan, Kenzo Hirose, Christi M Walsh, Michael Quartuccio, Niraj M Desai, Vikesh K Singh, Rita R Kalyani, Daniel S Warren, Zhaoli Sun, Marie N Hanna, Martin A Makary
Importance: Pain management of patients with chronic pancreatitis (CP) can be challenging. Laparoscopy has been associated with markedly reduced postoperative pain but has not been widely applied to total pancreatectomy with islet autotransplantation (TPIAT). Objective: To examine the feasibility of using laparoscopic TPIAT (L-TPIAT) in the treatment of CP. Design, Setting, and Participants: Thirty-two patients with CP presented for TPIAT at a tertiary hospital from January 1, 2013, through December 31, 2015...
February 22, 2017: JAMA Surgery
https://www.readbyqxmd.com/read/28236139/iron-dopamine-genetics-and-hormones-in-the-pathophysiology-of-restless-legs-syndrome
#18
REVIEW
Farhan H Khan, Caitlyn D Ahlberg, Christopher A Chow, Divya R Shah, Brian B Koo
Restless legs syndrome (RLS) is a common, chronic neurologic condition, which causes a persistent urge to move the legs in the evening that interferes with sleep. Human and animal studies have been used to study the pathophysiologic state of RLS and much has been learned about the iron and dopamine systems in relation to RLS. Human neuropathologic and imaging studies have consistently shown decreased iron in different brain regions including substantia nigra and thalamus. These same areas also demonstrate a state of relative dopamine excess...
February 24, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28199203/neurogenetics-of-acute-and-chronic-opiate-opioid-abstinence-treating-symptoms-and-the-cause
#19
Kenneth Blum, Mark S Gold, William Jacobs, William Vaughn McCall, Marcelo Febo, David Baron, Kristina Dushaj, Zsolt Demetrovics, Rajendra D Badgaiyan
This review begins with a comprehensive history of opioid dependence and treatment in the United States. The focus is an evidence-based treatment model for opioid/opiate dependent individuals. The role of reward genetic polymorphisms and the epigenetic modifications that lead to vulnerability to use and misuse of opiates/opioid to treat pain are reviewed. The neurochemical mechanisms of acute opiate withdrawal and opiate/opioid reward mechanisms are explored with a goal of identifying specific treatment targets...
March 1, 2017: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28188737/genetic-variation-in-the-behavioral-effects-of-buprenorphine-in-female-mice-derived-from-a-murine-model-of-the-oprm1-a118g-polymorphism
#20
Caroline A Browne, Rebecca L Erickson, Julie A Blendy, Irwin Lucki
Pharmacogenetic studies have identified the non-synonymous single nucleotide polymorphism (A118G) in the human mu opioid receptor (MOR) gene (OPRM1) as a critical genetic variant capable of altering the efficacy of opioid therapeutics. To date few studies have explored the potential impact of the OPRM1 A118G polymorphism on the pharmacological effects of buprenorphine (BPN), a potent MOR partial agonist and kappa opioid receptor antagonist, which is approved by the FDA for the treatment of opioid addiction and chronic pain...
May 1, 2017: Neuropharmacology
keyword
keyword
62457
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"