keyword
MENU ▼
Read by QxMD icon Read
search

cyp2c19

keyword
https://www.readbyqxmd.com/read/28515818/pharmacogenomic-testing-for-psychotropic-medication-selection-a-systematic-review-of-the-assurex-genesight-psychotropic-test
#1
(no author information available yet)
BACKGROUND: A large proportion of the Ontario population lives with a diagnosed mental illness. Nearly 5% of Ontarians have major depressive disorder, and another 5% have another type of depressive disorder, bipolar disorder, schizophrenia, anxiety, or some other disorder not otherwise specified. Medications are commonly used to treat mental illness, but choosing the right medication for each patient is challenging, and more than 40% of patients discontinue their medication within 90 days because of adverse effects or lack of response...
2017: Ontario Health Technology Assessment Series
https://www.readbyqxmd.com/read/28513222/the-contribution-of-cyp2c-gene-subfamily-involved-in-epoxygenase-pathway-of-arachidonic-acids-metabolism-to-hypertension-susceptibility-in-russian-population
#2
Alexey Polonikov, Marina Bykanova, Irina Ponomarenko, Svetlana Sirotina, Anna Bocharova, Kseniya Vagaytseva, Vadim Stepanov, Mikhail Churnosov, Olga Bushueva, Maria Solodilova, Yaroslav Shvetsov, Vladimir Ivanov
Numerous studies demonstrated an importance of cytochrome P-450 epoxygenase pathway of arachidonic acids metabolism for the pathogenesis of essential hypertension (EH). The present study was designed to investigate whether common single-nucleotide polymorphisms (SNP) of CYP2C gene subfamily such as CYP2C8 (rs7909236 and rs1934953), CYP2C9 (rs9332242), and CYP2C19 (rs4244285) are associated with susceptibility to EH in Russian population. A total of 816 unrelated Russian individuals comprising 425 EH patients and 391 normotensive controls were included into the study...
May 17, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/28511321/-impact-of-cyp2c19-genotype-and-platelet-function-on-clinical-outcome-in-coronary-atherosclerotic-heart-diseases-patients-received-clopidogrel-post-percutaneous-coronary-intervention
#3
Y Wu, X X Zhang, L Tian, J J Jiang, L Xu, Y L Huang, H Liu, Y S Li
Objective: To analyze association of CYP2C19 genotype and platelet function phenotype and their impact on clinical outcomes including bleeding events of coronary artery disease(CAD) patients received clopidogrel post percutaneous coronary intervention(PCI). Methods: Coronary atherosclerotic heart diseases patients underwent elective PCI and coronary stent implantation in Fuwai hospital were prospectively enrolled during May 2012 to April 2013. Patients were assigned into groups by genotype of CYP2C19 (extensive metabolizers, intermediate metabolizers, and poor metabolizers) and phenotype of platelet function (clopidogrel responders, semi-responders, and non-responders)...
May 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/28507476/effect-of-clopidogrel-on-the-hydroxylation-and-sulfoxidation-of-omeprazole-a-single-dose-study-in-healthy-human-volunteers
#4
Lateef Ahmad, Zafar Iqbal, Shabnam Nazir, Abad Khan, Yasar Shah, Muhammad Imran Khan, Ismail Khan, Amjad Khan
Based upon the known potential interaction between omeprazole (OMP) and clopidogrel (CLOP), the current study was designed to evaluate the effect of CLOP on disposition of OMP and its two major metabolites, 5-hydroxyomeprazole (5-OH-OMP) and omeprazole sulfone (OMP-S) in healthy clinical subjects. A randomized, open label, 2-period, crossover study was designed. Twelve volunteers were selected, of whom eight were extensive metabolizers (EM) of CYP2C19 and 4 were poor metabolizers (PM). They received single dose of OMP either alone or in combination with CLOP (single dose) and samples were collected periodically to calculate various pharmacokinetic parameters...
2017: EXCLI journal
https://www.readbyqxmd.com/read/28506184/complications-of-psychotropic-and-pain-medications-in-an-ultrarapid-metabolizer-patient-at-the-upper-1-of-cytochrome-p450-cyp450-function-quantified-by-combinatorial-cyp450-genotyping
#5
Gualberto Ruaño, Karen Larsen, Mohan Kocherla, James Samuel Graydon, Jonathan Kost
A 44-year-old Caucasian woman presented with a history of empirical treatment with 20 pain and psychotropic medications, as well as dual comorbidity of intractable pain and depression. A multiple gain-of-function profile in the CYP450 family of cytochrome P450 (CYP450) drug metabolism isoenzymes was discovered. The patient was a homozygote of suprafunctional alleles for both CYP2D6 ((*)35/(*)35) and CYP2C19 ((*)17/(*)17) genes and functional alleles for CYP2C9 ((*)1/(*)1), which account for aggregate drug metabolism function at the upper 1% of the population...
May 16, 2017: Journal of Pain & Palliative Care Pharmacotherapy
https://www.readbyqxmd.com/read/28496987/effect-of-health-foods-on-cytochrome-p450-mediated-drug-metabolism
#6
Takamitsu Sasaki, Yu Sato, Takeshi Kumagai, Kouichi Yoshinari, Kiyoshi Nagata
BACKGROUND: Health foods have been widely sold and consumed in Japan. There has been an increase in reports of adverse effects in association with the expanding health food market. While health food-drug interactions are a particular concern from the viewpoint of safe and effective use of health foods, information regarding such interactions is limited owing to the lack of established methods to assess the effects of health food products on drug metabolism. We therefore developed cells that mimicked the activities of cytochrome P450 1A2 (CYP1A2), CYP2C9, CYP2C19, CYP2D6, and CYP3A4, which strongly contribute to drug metabolism in human hepatocytes, and established a system to assess the inhibitory activity of health foods toward P450-mediated metabolism...
2017: Journal of Pharmaceutical Health Care and Sciences
https://www.readbyqxmd.com/read/28494448/effects-of-cyp2c19-variants-on-fluoxetine-metabolism-in-vitro
#7
Ping Fang, Jia-Yang He, Ai-Xia Han, Tian Lan, Da-Peng Dai, Jian-Ping Cai, Guo-Xin Hu
AIMS: CYP2C19 is an important member of the cytochrome P450 enzyme superfamily. We recently identified 31 CYP2C19 alleles in the Han Chinese population. The aim of this study was to assess the catalytic activities of these allelic isoforms and their effects on the metabolism of fluoxetine in vitro. METHODS: The wild-type and 30 CYP2C19 variants were expressed in insect cells and each variant was characterized using fluoxetine as the substrate. Reactions were performed at 37°C with 20-1,000 µmol/L substrate for 30 min...
May 12, 2017: Pharmacology
https://www.readbyqxmd.com/read/28490712/application-of-physiologically-based-pharmacokinetic-modeling-for-the-prediction-of-tofacitinib-exposure-in-japanese
#8
Misaki Suzuki, Susanna Tse, Midori Hirai, Yoichi Kurebayashi
Tofacitinib (3-[(3R,4R)-4-methyl-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]piperidin-1-yl]-3 -oxopropanenitrile) is an oral Janus kinase inhibitor that is approved in countries including Japan and the United States for the treatment of rheumatoid arthritis, and is being developed across the globe for the treatment of inflammatory diseases. In the present study, a physiologically-based pharmacokinetic model was applied to compare the pharmacokinetics of tofacitinib in Japanese and Caucasians to assess the potential impact of ethnicity on the dosing regimen in the two populations...
May 9, 2017: Kobe Journal of Medical Sciences
https://www.readbyqxmd.com/read/28489395/identification-of-potent-and-selective-cyp1a1-inhibitors-via-combined-ligand-and-structure-based-virtual-screening-and-their-in-vitro-validation-in-sacchrosomes-and-live-human-cells
#9
Prashant Joshi, Glen J P McCann, Vinay Sonawane, Ram A Vishwakarma, Bhabatosh Chaudhuri, Sandip B Bharate
Target structure-guided virtual screening (VS) is a versatile, powerful and inexpensive alternative to experimental high-throughput screening (HTS). In order to discover potent CYP1A1 enzyme inhibitors for cancer chemoprevention, a commercially library of 50,000 small molecules was utilized for VS guided by both ligand and structure-based strategies. For experimental validation, 300 ligands were proposed based on combined analysis of fitness scores from ligand based e-pharmacophore screening and docking score, prime MMGB/SA binding affinity and interaction pattern analysis from structure-based VS...
May 10, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28484907/inhibition-of-cytochrome-p450-and-uridine-5-diphospho-glucuronosyltransferases-by-mam-2201-in-human-liver-microsomes
#10
Tae Yeon Kong, Ju-Hyun Kim, Soon-Sang Kwon, Jae Chul Cheong, Hee Seung Kim, Moon Kyo In, Hye Suk Lee
MAM-2201, a synthetic cannabinoid, is a potent agonist of the cannabinoid receptors and is increasingly used as an illicit recreational drug. The inhibitory effects of MAM-2201 on major drug-metabolizing enzymes such as cytochrome P450s (CYPs) and uridine 5'-diphospho-glucuronosyltransferases (UGTs) have not yet been investigated although it is widely abused, sometimes in combination with other drugs. We evaluated the inhibitory effects of MAM-2201 on eight major human CYPs (CYPs 1A2, 2A6, 2B6, 2C8, 2C9, 2C19, 2D6, and 3A4) and six UGTs (UGTs 1A1, 1A3, 1A4, 1A6, 1A9, and 2B7) of pooled human liver microsomes; we thus explored potential MAM-2201-induced drug interactions...
May 8, 2017: Archives of Pharmacal Research
https://www.readbyqxmd.com/read/28482780/voriconazole-induced-hyponatraemia-associated-with-homozygous-cyp2c19-2-genotype
#11
Sharon Ho, Matthew Rawlins, Paul Ingram, Peter Boan
No abstract text is available yet for this article.
May 8, 2017: Journal of Chemotherapy
https://www.readbyqxmd.com/read/28481007/the-influence-of-cyp2c19-polymorphisms-on-exacerbating-effect-of-rabeprazole-in-celecoxib-induced-small-bowel-injury
#12
Y Nuki, J Umeno, E Washio, Y Maehata, A Hirano, M Miyazaki, H Kobayashi, T Kitazono, T Matsumoto, M Esaki
BACKGROUND: Simultaneous use of proton pump inhibitors (PPIs) has been shown to increase the risk of nonsteroidal anti-inflammatory drug (NSAID)-induced small bowel injury. AIM: To investigate whether polymorphisms of the cytochrome P450 2C19 gene (CYP2C19), encoding a key metabolising enzyme for PPIs, are associated with small bowel injury induced by celecoxib in combination with the PPI rabeprazole. METHODS: Study participants included 55 healthy Japanese volunteers, who participated in the PPI-NSAID Kyushu University Study using video capsule endoscopy...
May 8, 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28480819/should-a-routine-genotyping-of-cyp2d6-and-cyp2c19-genetic-polymorphisms-be-recommended-to-predict-venlafaxine-efficacy-in-depressed-patients-treated-in-psychiatric-settings
#13
Adela Taranu, Romain Colle, Florence Gressier, Khalil El Asmar, Laurent Becquemont, Emmanuelle Corruble, Céline Verstuyft
AIM: The antidepressant venlafaxine (VEN) is metabolized by CYP2D6 and CYP2C19. The aim of this study was to assess the relevance of generalizing to daily practice the genotyping of CYP2D6 and CYP2C19 to predict VEN efficacy in depressed patients treated in psychiatric settings. PATIENTS & METHODS: This study was nested in a naturalistic cohort, with 206 patients requiring a new antidepressant treatment and genotyped for CYP2D6 *3, *4, *5 del, *6, *2xN, *10, *41 and CYP2C19 *2, *3, *4, *5, *17 alleles...
May 8, 2017: Pharmacogenomics
https://www.readbyqxmd.com/read/28480783/pharmacogenetics-of-drug-drug-interaction-and-drug-drug-gene-interaction-a-systematic-review-on-cyp2c9-cyp2c19-and-cyp2d6
#14
Muh Akbar Bahar, Didik Setiawan, Eelko Hak, Bob Wilffert
Currently, most guidelines on drug-drug interaction (DDI) neither consider the potential effect of genetic polymorphism in the strength of the interaction nor do they account for the complex interaction caused by the combination of DDI and drug-gene interaction (DGI) where there are multiple biotransformation pathways, which is referred to as drug-drug-gene interaction (DDGI). In this systematic review, we report the impact of pharmacogenetics on DDI and DDGI in which three major drug-metabolizing enzymes - CYP2C9, CYP2C19 and CYP2D6 - are central...
May 8, 2017: Pharmacogenomics
https://www.readbyqxmd.com/read/28480228/elevated-voriconazole-level-associated-with-hallucinations-and-suicidal-ideation-a-case-report
#15
Jeffrey W Jansen, Sumon K Sen, Ryan P Moenster
Voriconazole, a broad-spectrum antifungal, has been associated with visual and auditory hallucinations. We report the case of patient being treated with voriconazole for pulmonary aspergillosis who developed visual hallucinations and new suicidal ideation with plan. Voriconazole troughs were supratherapeutic (9.0 mcg/mL) and the patient was positive for the CYP2C19*1/*2 allele.
2017: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/28475098/genetic-polymorphisms-of-cytochrome-p450-enzymes-cyp2c9-cyp2c19-cyp2d6-cyp3a4-and-cyp3a5-in-the-croatian-population
#16
Lana Ganoci, Tamara Božina, Nikica Mirošević Skvrce, Mila Lovrić, Petar Mas, Nada Božina
BACKGROUND: Data on the frequency of pharmacogenetic polymorphisms in the Croatian population are limited. We determined and analyzed frequencies for the most important CYP2C9, CYP2C19, CYP2D6, CYP3A4, and CYP3A5 genetic variants in the Croatian population. METHODS: 2637 subjects were included. Genotyping was performed by real-time polymerase chain reaction (PCR) using TaqMan® DME or TaqMan® SNP Genotyping Assays, and by PCR, and PCR-RFLP analysis. RESULTS: For CYP2C9, allele frequencies of *2 and *3 variant were 14...
February 11, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28473221/cyp2c19-activity-and-cardiovascular-risk-factors-in-patients-with-an-acute-coronary-syndrome
#17
Efrén Martínez-Quintana, Fayna Rodríguez-González, José María Medina-Gil, Paloma Garay-Sánchez, Antonio Tugores
INTRODUCTION: CYP2C19 is a major isoform of cytochrome P450 that metabolizes a number of drugs and is involved in the glucocorticoids synthesis. CYP2C19 polymorphisms have been associated with the genetic risk for type 2 diabetes. METHODS: Five hundred and three patients with an acute coronary event were studied to assess the association between the CYP2C19 activity (CYP2C19*2, CYP2C19*3 and CYP2C19*17 variants) and the type of acute coronary syndrome, cardiovascular risk factors (arterial systemic hypertension, diabetes mellitus, dyslipidemia and smoking), analytical parameters and the extent and severity of coronary atherosclerosis...
May 1, 2017: Medicina Clínica
https://www.readbyqxmd.com/read/28470111/serum-clomipramine-and-desmethylclomipramine-levels-in-a-cyp2c19-and-cyp2d6-intermediate-metabolizer
#18
Jacob T Brown, Mark Schneiderhan, Seenae Eum, Jeffrey R Bishop
Pharmacogenetics within psychiatry has the potential to aid in the dose and selection of medications. A substantial number of psychiatric medications are metabolized through either of the highly polymorphic drug-metabolizing enzymes CYP2D6 and CYP2C19. Of these, clomipramine is subject to metabolism by both CYP2C19 and CYP2D6, leaving individuals with deficiencies of these drug-metabolizing enzymes at risk of higher concentrations of the parent molecule. Herein, we present the case of a 29-year-old male with diagnoses of depression and obsessive compulsive disorder who had trialed and failed a dozen psychiatric medications, many of which are subject to metabolism by CYP2D6 and/or CYP2C19, and had most recently been taking clomipramine for approximately 2...
May 4, 2017: Pharmacogenomics
https://www.readbyqxmd.com/read/28470107/cyp450-genotype-and-aggressive-behavior-on-selective-serotonin-reuptake-inhibitors
#19
Corine Ekhart, Maja Matic, Agnes Kant, Eugène van Puijenbroek, Ron van Schaik
AIM: Genetic variants for selective serotonin reuptake inhibitor (SSRI) metabolizing enzymes have been hypothesized to be a risk factor for aggression as adverse drug effect of SSRIs. Our aim was to assess the possible involvement of these polymorphisms on aggression when using SSRIs. MATERIALS & METHODS: A retrospective noninterventional case-control study was performed on 18 cases. The genetic profile of two main genes involved in the metabolism of SSRIs was determined, and predicted phenotype frequencies were compared with Dutch controls and literature data...
May 4, 2017: Pharmacogenomics
https://www.readbyqxmd.com/read/28468305/inhibitory-effects-of-dimethyllirioresinol-epimagnolin-a-eudesmin-fargesin-and-magnolin-on-cytochrome-p450-enzyme-activities-in-human-liver-microsomes
#20
Ju-Hyun Kim, Soon-Sang Kwon, Hyeon-Uk Jeong, Hye Suk Lee
Magnolin, epimagnolin A, dimethyllirioresinol, eudesmin, and fargesin are pharmacologically active tetrahydrofurofuranoid lignans found in Flos Magnoliae. The inhibitory potentials of dimethyllirioresinol, epimagnolin A, eudesmin, fargesin, and magnolin on eight major human cytochrome P450 (CYP) enzyme activities in human liver microsomes were evaluated using liquid chromatography-tandem mass spectrometry to determine the inhibition mechanisms and inhibition potency. Fargesin inhibited CYP2C9-catalyzed diclofenac 4'-hydroxylation with a Ki value of 16...
May 1, 2017: International Journal of Molecular Sciences
keyword
keyword
47396
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"