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https://www.readbyqxmd.com/read/29431852/nicotine-use-smoking-is-associated-with-the-efficacy-of-naltrexone-in-the-treatment-of-alcohol-dependence
#1
Raymond F Anton, Patricia K Latham, Konstantin E Voronin, Patrick K Randall, Sarah W Book, Michaela Hoffman, Joseph P Schacht
BACKGROUND: The opioid antagonist naltrexone is not efficacious for every alcohol treatment seeker. However, various individual factors, such as genetic differences and nicotine-use/smoking status, have been suggested as predictors of naltrexone response. In a randomized clinical trial, we previously reported that nicotine-use/smoking status might be a stronger predictor of naltrexone efficacy than OPRM1 A118G single nucleotide polymorphism (SNP) genotype. In this report, we further characterize the nicotine-users in that trial, examine other drinking outcomes, examine the influence of smoking change on naltrexone effects on drinking, and validate the result in smokers with disialo carbohydrate-deficient transferrin (%dCDT) change as an independent biomarker of response...
February 12, 2018: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/29422496/opioid-antagonists-and-the-a118g-polymorphism-in-the-%C3%AE-opioid-receptor-gene-effects-of-gsk1521498-and-naltrexone-in-healthy-drinkers-stratified-by-oprm1-genotype
#2
Hisham Ziauddeen, Liam J Nestor, Naresh Subramaniam, Chris Dodds, Pradeep J Nathan, Sam R Miller, Bhopinder K Sarai, Kay Maltby, Disala Fernando, Liling Warren, Louise K Hosking, Dawn Waterworth, Anna Korzeniowska, Beta Win, Duncan B Richards, Lakshmi Vasist Johnson, Paul C Fletcher, Edward T Bullmore
This corrects the article DOI: 10.1038/npp.2016.60.
March 2018: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29413524/mu-opioid-pharmacology-40-years-to-the-promised-land
#3
Gavril W Pasternak
Opioids continue to play a major role in medicine, but not without problems. Side effects limit their utility medically, while the potential of addiction has had a major societal impact. Pharmacologists have been trying to develop opioids lacking side effects since the first derivative, heroin, was synthesized in the 1870s. The identification of opioid receptors about 40 years ago opened up new insights into our understanding of opioid action, fueled by the molecular biology revolution of the 1980s and 1990s...
2018: Advances in Pharmacology
https://www.readbyqxmd.com/read/29391279/gut-microbiota-modulates-alcohol-withdrawal-induced-anxiety-in-mice
#4
Hui-Wen Xiao, Chang Ge, Guo-Xing Feng, Yuan Li, Dan Luo, Jia-Li Dong, Hang Li, Haichao Wang, Ming Cui, Sai-Jun Fan
Excessive alcohol consumption remains a major public health problem that affects millions of people worldwide. Accumulative experimental evidence has suggested an important involvement of gut microbiota in the modulation of host's immunological and neurological functions. However, it is previously unknown whether enteric microbiota is implicated in the formation of alcohol withdrawal-induced anxiety. Using a murine model of chronic alcoholism and withdrawal, we examined the impact of alcohol consumption on the possible alterations of gut microbiota as well as alcohol withdrawal-induced anxiety and behavior changes...
January 29, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29385578/factors-influencing-the-impact-of-pharmacogenomic-prescribing-on-adherence-to-nicotine-replacement-therapy-a-qualitative-study-of-participants-from-a-randomized-controlled-trial
#5
Alison J Wright, Stephen Sutton, David Armstrong, Paul Aveyard, Ann Louise Kinmonth, Theresa M Marteau
Pharmacogenomics may improve health outcomes in two ways: by more precise and therefore more effective prescribing, tailored to genotype, and by increasing perceived effectiveness of treatments and so motivation for adherence. Little is known about patients' experiences of, and reactions to, receiving pharmacogenomically tailored treatments. The aim of this study was to explore the impact of pharmacogenomic prescribing of nicotine replacement therapy (NRT) on smokers' initial expectations of quit success, adherence, and perceived important differences from previous quit attempts...
January 29, 2018: Translational Behavioral Medicine
https://www.readbyqxmd.com/read/29378417/epigenetic-modifications-following-noxious-stimuli-in-infants
#6
Linda A Hatfield, Rebecca K Hoffman, Rosemary C Polomano, Yvette Conley
PURPOSE: To recruit healthy full- and preterm infants into genetic research and determine the effectiveness of a noninvasive DNA sampling technique for comparing epigenetic modifications. BACKGROUND: Noxious stimuli during a vulnerable period of infant neuronal plasticity may trigger long-term epigenetic changes affecting neurodevelopment, pain modulation, and reactivity. Recognizing epigenetic pain findings is problematic because parents are reluctant to enroll newborns into genetic research...
January 1, 2018: Biological Research for Nursing
https://www.readbyqxmd.com/read/29351172/a-systematic-review-and-meta-analysis-of-genetic-risk-factors-for-neuropathic-pain
#7
Abirami Veluchamy, Harry L Hébert, Weihua Meng, Colin N A Palmer, Blair H Smith
Neuropathic pain (NP) is an increasingly common chronic pain state and a major health burden, affecting approximately 7-10% of the general population. Emerging evidence suggests that genetic factors could partially explain individual susceptibility to NP and the estimated heritability in twins is 37%. The aim of this study was to systematically review and summarize the studies in humans that have investigated the influence of genetic factors associated with NP. We conducted a comprehensive literature search and performed meta-analyses of all the potential genetic variants associated with NP...
January 18, 2018: Pain
https://www.readbyqxmd.com/read/29333880/pharmacogenetic-analysis-of-opioid-dependence-treatment-dose-and-dropout-rate
#8
Richard C Crist, James Li, Glenn A Doyle, Alex Gilbert, Bryan M Dechairo, Wade H Berrettini
BACKGROUND: Currently, no pharmacogenetic tests for selecting an opioid-dependence pharmacotherapy have been approved by the US Food and Drug Administration. OBJECTIVES: Determine the effects of variants in 11 genes on dropout rate and dose in patients receiving methadone or buprenorphine/naloxone (ClinicalTrials.gov Identifier: NCT00315341). METHODS: Variants in six pharmacokinetic genes (CYP1A2, CYP2B6, CYP2C19, CYP2C9, CYP2D6, CYP3A4) and five pharmacodynamic genes (HTR2A, OPRM1, ADRA2A, COMT, SLC6A4) were genotyped in samples from a 24-week, randomized, open-label trial of methadone and buprenorphine/naloxone for the treatment of opioid dependence (n = 764; 68...
January 15, 2018: American Journal of Drug and Alcohol Abuse
https://www.readbyqxmd.com/read/29319460/polymorphism-of-opioid-receptors-%C3%AE-1-in-highly-hypnotizable-subjects
#9
Silvano Presciuttini, Michele Curcio, Rosalia Sciarrino, Fabrizio Scatena, Mark P Jensen, Enrica L Santarcangelo
The possible cooperation between hypnotizability-related and placebo mechanisms in pain modulation has not been consistently assessed. Here, we investigate possible genetic bases for such cooperation. The OPRM1 gene, which encodes the μ1 opioid receptor-the primary site of action for endogenous and exogenous opioids-is polymorphic in the general population for the missense mutation Asn40Asp (A118G, rs1799971). The minor allele 118G results in decreased levels of OPRM1 mRNA and protein. As a consequence, G carriers are less responsive to opioids...
January 2018: International Journal of Clinical and Experimental Hypnosis
https://www.readbyqxmd.com/read/29302220/a-brief-review-of-the-genetics-and-pharmacogenetics-of-opioid-use-disorders
#10
Wade Berrettini
Increased physician prescribing of opioids to treat chronic nonprogressive pain has been accompanied by an increase in opioid addiction. Twin studies of opioid addiction are consistent with an inherited component of risk, approximately 50%. Several genome-wide association study (GWAS) reports indicate that genetic risk for opioid addiction is conveyed by many alleles of small effect (odds ratios <1.5). These reports have detected alleles in potassium-ion-channel genes (KCNC1 and KCNG2) and in a glutamate receptor auxiliary protein (CNIH3)...
September 2017: Dialogues in Clinical Neuroscience
https://www.readbyqxmd.com/read/29259946/genetic-analysis-of-mu-and-kappa-opioid-receptor-and-comt-enzyme-in-cancer-pain-tunisian-patients-under-opioid-treatment
#11
Imen Chatti, Jean-Baptiste Woillard, Amira Mili, Isabelle Creveaux, Ilhem Ben Charfeddine, Jihène Feki, Sarah Langlais, Leila Ben Fatma, Ali Saad, Moez Gribaa, Frédéric Libert
Background: Pain and its opioid treatments are complex measurable traits. Responses to morphine in terms of pain control is likely to be determined by many factors, including the underlying pain sensitivity of the patient, along with nature and extent of the painful process, concomitant medications, genetic and other clinical and environmental factors. This study investigated genetic polymorphisms implicated in the inter-individual pain response variability to opioid treatment in the Tunisian population...
December 2017: Iranian Journal of Public Health
https://www.readbyqxmd.com/read/29209387/spicy-food-preference-and-risk-for-alcohol-dependence-in-korean
#12
Ji-Hun Park, Sung-Gon Kim, Ji-Hoon Kim, Jin-Seong Lee, Woo-Young Jung, Hyeon-Kyeong Kim
Objective: Previous studies have reported that both preference for spicy food and drinking behavior are associated with the activity of the opioid system in the central nervous system. The relationship between the preference for spicy food and the risk of alcohol dependence by comparing spicy food preference in alcohol-dependent patients vs. healthy controls was investigated. Also the association between the preference for spicy food and OPRM1 A118G was studied. Methods: A total of 150 Korean male patients with alcohol dependence and 100 normal male control subjects were included in this study...
November 2017: Psychiatry Investigation
https://www.readbyqxmd.com/read/29205277/clinical-and-genetic-factors-are-associated-with-pain-and-hospitalisation-rates-in-sickle-cell-anaemia-in-cameroon
#13
Ambroise Wonkam, Khuthala Mnika, Valentina J Ngo Bitoungui, Bernard Chetcha Chemegni, Emile R Chimusa, Collet Dandara, Andre P Kengne
We aimed to investigate the clinical and genetic predictors of painful vaso-occlusive crises (VOC) in sickle cell disease (SCD) in Cameroon. Socio-demographics, clinical variables/events and haematological indices were acquired. Genotyping was performed for 40 variants in 17 pain-related genes, three fetal haemoglobin (HbF)-promoting loci, two kidney dysfunctions-related genes, and HBA1/HBA2 genes. Statistical models using regression frameworks were performed in R® . A total of 436 hydoxycarbamide- and opioid-naïve patients were studied; median age was 16 years...
December 3, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/29190510/predicted-activity-of-ugt2b7-abcb1-oprm1-and-comt-using-full-gene-haplotypes-and-their-association-with-the-cyp2d6-inferred-metabolizer-phenotype
#14
Frank R Wendt, Antti Sajantila, Bruce Budowle
The pharmacogene, CYP2D6, is commonly used to infer metabolizer phenotype of many marketed drugs and endogenous toxins in ante- and post-mortem patients but only represents the efficiency of phase 1 metabolism. Downstream metabolic enzymes encoded by UGT2B7, ABCB1, OPRM1, and COMT also have been implicated in variable individual response to drugs due to their activity at different stages of the tramadol ADME (absorption, distribution, metabolism, and excretion) process. While commonly studied as single genes using targeted genotyping approaches, a more comprehensive tramadol metabolism profile has not been evaluated...
November 26, 2017: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/29170626/role-of-microrna-143-in-nerve-injury-induced-upregulation-of-dnmt3a-expression-in-primary-sensory-neurons
#15
Bo Xu, Jing Cao, Jun Zhang, Shushan Jia, Shaogen Wu, Kai Mo, Guihua Wei, Lingli Liang, Xuerong Miao, Alex Bekker, Yuan-Xiang Tao
Peripheral nerve injury increased the expression of the DNA methyltransferase 3A (Dnmt3a) mRNA and its encoding Dnmt3a protein in injured dorsal root ganglia (DRG). This increase is considered as an endogenous instigator in neuropathic pain genesis through epigenetic silencing of pain-associated genes (such as Oprm1) in injured DRG. However, how DRG DNMT3a is increased following peripheral nerve injury is still elusive. We reported here that peripheral nerve injury caused by the fifth spinal nerve ligation (SNL) downregulated microRNA (miR)-143 expression in injured DRG...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/29162165/epigenetic-correlates-of-neonatal-contact-in-humans
#16
Sarah R Moore, Lisa M McEwen, Jill Quirt, Alex Morin, Sarah M Mah, Ronald G Barr, W Thomas Boyce, Michael S Kobor
Animal models of early postnatal mother-infant interactions have highlighted the importance of tactile contact for biobehavioral outcomes via the modification of DNA methylation (DNAm). The role of normative variation in contact in early human development has yet to be explored. In an effort to translate the animal work on tactile contact to humans, we applied a naturalistic daily diary strategy to assess the link between maternal contact with infants and epigenetic signatures in children 4-5 years later, with respect to multiple levels of child-level factors, including genetic variation and infant distress...
December 2017: Development and Psychopathology
https://www.readbyqxmd.com/read/29137427/association-of-opioid-receptor-mu-1-oprm1-a118g-polymorphism-rs1799971-with-nicotine-dependence
#17
Xiangyi Kong, Hao Deng, Theodore Alston, Yanguo Kong, Jingping Wang
Background and Object: Whether opioid-receptor mu 1 (OPRM1) A118G polymorphism (rs1799971) is associated with nicotine dependence is controversial. We analyzed the combined results from published studies of this possibility. Methods: Literature reviews were performed according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Web of Science, Chinese National Science Infrastructure (CNKI), PubMed, Embase and Google Scholar database searches using MeSH terms were conducted to find all relevant researches up to October 2016...
October 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/29129606/transgenerational-blunting-of-morphine-induced-corticosterone-secretion-is-associated-with-dysregulated-gene-expression-in-male-offspring
#18
Fair M Vassoler, Anika M Toorie, Elizabeth M Byrnes
A number of parental experiences, even when occurring prior to conception, have been shown to induce transgenerational effects beyond the first generation. In the case of exposure to drugs of abuse, studies in rodents suggest that offspring demonstrate significant differences in how they respond to the drug to which their parent was exposed. We have previously observed significant alterations in morphine analgesia, conditioned place preference and self-administration in the offspring of females exposed to morphine during adolescent development...
November 9, 2017: Brain Research
https://www.readbyqxmd.com/read/29127441/verification-of-a-genetic-locus-for-methamphetamine-intake-and-the-impact-of-morphine
#19
Emily C Eastwood, Amy J Eshleman, Aaron Janowsky, Tamara J Phillips
A quantitative trait locus (QTL) on proximal chromosome (Chr) 10 accounts for > 50% of the genetic variance in methamphetamine (MA) intake in mice selectively bred for high (MAHDR) and low (MALDR) voluntary MA drinking. The µ-opioid receptor (MOP-r) gene, Oprm1, resides at the proximal end of Chr 10, and buprenorphine reduces MA intake in MAHDR mice. However, this drug has only partial agonist effects at MOP-r. We investigated the impact of a full MOP-r agonist, morphine, on MA intake and saccharin intake, measured MOP-r density and affinity in several brain regions of the MA drinking lines and their C57BL/6J (B6) and DBA/2J (D2) progenitor strains, and measured MA intake in two congenic strains of mice to verify the QTL and reduce the QTL interval...
November 10, 2017: Mammalian Genome: Official Journal of the International Mammalian Genome Society
https://www.readbyqxmd.com/read/29123234/predictors-of-naltrexone-response-in-a-randomized-trial-reward-related-brain-activation-oprm1-genotype-and-smoking-status
#20
Joseph P Schacht, Patrick K Randall, Patricia K Latham, Konstantin E Voronin, Sarah W Book, Hugh Myrick, Raymond F Anton
This corrects the article DOI: 10.1038/npp.2017.74.
December 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
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