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Drug Metabolism and Personalized Therapy

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https://www.readbyqxmd.com/read/29135452/drug-drug-interactions-in-cancer-chemotherapy-an-observational-study-in-a-tertiary-health-care-centre
#1
Harminder Singh, Baltej Singh
BACKGROUND: The objective of this study was to evaluate the occurrence of drug-drug interactions (DDIs) in patients on cancer chemotherapy, with the identification of risk factors for these DDIs. METHODS: This was a cross-sectional, descriptive study carried out at the Department of Onco-Radiation at Guru Gobind Singh Medical College, Faridkot, Punjab. The DDIs were recorded with the help of a drug interaction/interplay information software. RESULTS: In total, 354 interactions were identified from 283 patient records...
November 14, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28917081/evaluation-of-the-ecstasy-influence-on-tramadol-and-its-main-metabolite-plasma-concentration-in-rats
#2
Bardia Jamali, Behjat Sheikholeslami, Yalda Hosseinzadeh Ardakani, Hoda Lavasani, Mohammad-Reza Rouini
BACKGROUND: Tramadol is prone to be abused alone, or in combination with 3,4-methylenedioxymethamphetamine (MDMA, Ecstasy). It was reported that 95% of people with a history of substance abuse in the United States used tramadol in 2004. According to the WHO report in 2016, there was a growing number of tramadol abusers alone or in combination with psychoactive substances such as MDMA in particular in some Middle East countries. Higher concentrations of tramadol in plasma may lead to adverse drug reactions or lethal intoxication...
September 26, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28873066/preliminary-study-of-the-association-between-the-elimination-parameters-of-phenytoin-and-phenobarbital
#3
Janthima Methaneethorn, Duangchit Panomvana, Thaveechai Vachirayonstien
BACKGROUND: Therapeutic drug monitoring is essential for both phenytoin and phenobarbital therapy given their narrow therapeutic indexes. Nevertheless, the measurement of either phenytoin or phenobarbital concentrations might not be available in some rural hospitals. Information assisting individualized phenytoin and phenobarbital combination therapy is important. This study's objective was to determine the relationship between the maximum rate of metabolism of phenytoin (Vmax) and phenobarbital clearance (CLPB), which can serve as a guide to individualized drug therapy...
September 26, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28862982/effects-of-the-genetic-variants-of-organic-cation-transporters-1-and-3-on-the-pharmacokinetics-of-metformin-in-jordanians
#4
Nancy Hakooz, Yazun Bashir Jarrar, Malik Zihlif, Amer Imraish, Saja Hamed, Tawfiq Arafat
BACKGROUND: Human response to the antidiabetic metformin is influenced by some factors, such as genetic variants in the SLC22A genes. This study aimed to determine the frequency of main SLC22A1 and SLC22A3 genetic variants and their influence on metformin pharmacokinetics among healthy unrelated Arab Jordanians. PATIENTS AND METHODS: The SLC22A1 and SLC22A3 genes were genotyped by DNA sequencing of exons 1, 3, 7, and 9 in the SLC22A1 gene and exons 6, 7, and 9 in the SLC22A3 gene...
September 26, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28862981/need-for-pharmacogenetic-studies-on-the-prevalence-of-mthfr-mutations-in-puerto-ricans-and-hispanics
#5
Raúl H Morales-Borges
Methylenetetrahydrofolate reductase (MTHFR) mutations have been linked to many diseases. Evidence has been provided to prove that we need to perform pharmacogenetic studies regarding the prevalence of MTHFR mutations and diseases, risks, and the impact on folate requirement in general, but little has been published about Puerto Ricans. A multi center cross-sectional retrospective review study or a prospective pharmacogenetic study of valid genotypes and phenotypes of MTHFR mutations within the different populations of Puerto Ricans and Hispanics are recommended, because differences within them and within the general population are expected...
September 26, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28803225/carboxylesterase-1a2-encoding-gene-with-increased-transcription-and-potential-rapid-drug-metabolism-in-asian-populations
#6
Henrik Berg Rasmussen, Majbritt Busk Madsen, Yassine Kamal Lyauk, Peter Riis Hansen, Timothy Hughes
The carboxylesterase 1 gene (CES1) encodes a hydrolase implicated in the metabolism of commonly used drugs. CES1A2, a hybrid of CES1 and a CES1-like pseudogene, has a promoter that is weak in most individuals. However, some individuals harbor a promoter haplotype of this gene with two overlapping Sp1 sites that confer significantly increased transcription potentially leading to rapid drug metabolism. This CES1A2 haplotype has previously been reported to be common among Asians. Using polymerase chain reaction followed by sequencing, the present study examined variation in the promoter and 5' untranslated region of CES1A2 in 120 Han Chinese and 120 Japanese people enrolled in the 1000 Genomes Project...
September 26, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28787271/genotyping-and-phenotyping-of-cyp2d6-and-cyp3a-isoenzymes-in-patients-with-alcohol-use-disorder-correlation-with-haloperidol-plasma-concentration
#7
Dmitry A Sychev, Mikhail S Zastrozhin, Igor I Miroshnichenko, Natalia V Baymeeva, Valery V Smirnov, Elena A Grishina, Kristina A Ryzhikova, Karin B Mirzaev, Dmitry D Markov, Valentin Y Skryabin, Nataliya E Snalina, Polina G Nosikova, Ludmila M Savchenko, Evgeny A Bryun
BACKGROUND: Haloperidol is used for the treatment of alcohol use disorders in patients with signs of alcohol-related psychosis. Haloperidol therapy poses a high risk of adverse drug reactions (ADR). Contradictory data, which include the effects of genetic polymorphisms in genes encoding the elements of haloperidol biotransformation system on haloperidol metabolism rate and plasma drug concentration ratio, are described in patients with different genotypes. The primary objective of this study was to investigate the effects of CYP2D6 and CYP3A5 genetic polymorphisms on haloperidol equilibrium concentration in patients with alcohol use disorder...
September 26, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28787270/imatinib-quantification-in-human-serum-with-lc-ms3-as-an-effective-way-of-protein-kinase-inhibitor-analysis-in-biological-matrices
#8
Marek Dziadosz, Michael Klintschar, Jörg Teske
BACKGROUND: As imatinib gained a lot of attention in the field of medicine, appropriate methods are needed for drug analysis. LC-MS/MS combined with complex sample preparation and column enrichment is usually the method of choice when high sensitivity is necessary. The application of LC-MS3 in imatinib quantification has not been discussed in the literature. METHODS: An LC-MS3 imatinib quantification method was developed and validated in human serum. The sample preparation was based on the liquid-liquid extraction of 50 μL human serum...
September 26, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28599374/pharmacogenetics-based-optimisation-of-atazanavir-treatment-potential-role-of-new-genetic-predictors
#9
LETTER
Felicia Stefania Falvella, Elena Ricci, Stefania Cheli, Chiara Resnati, Valeria Cozzi, Dario Cattaneo, Cristina Gervasoni, Emilio Clementi, Massimo Galli, Agostino Riva
No abstract text is available yet for this article.
May 24, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28593920/influence-of-cyp3a4-and-cyp3a5-polymorphisms-on-tacrolimus-and-sirolimus-exposure-in-stable-kidney-transplant-recipients
#10
Erika Y Tamashiro, Claudia R Felipe, Fabiana D V Genvigir, Alice C Rodrigues, Antony B Campos, Rosario D C Hirata, Helio Tedesco-Silva, Jose O Medina-Pestana
BACKGROUND: Polymorphisms in genes encoding for drug-metabolizing enzymes and drug transporters are among multiple factors that modulate the pharmacokinetic variability of tacrolimus (TAC) and sirolimus (SRL). This study aimed to evaluate the influence of single nucleotide polymorphisms (SNPs) on TAC and SRL dose-adjusted concentrations (C0/D) in stable kidney transplant recipients. METHODS: This is an exploratory and prospective study, which includes 46 stable kidney transplant recipients...
May 24, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28525318/evaluation-of-genotype-guided-acenocoumarol-dosing-algorithms-in-russian-patients
#11
Dmitriy Alexeyevich Sychev, Aleksandr Vladimirovich Rozhkov, Anna Viktorovna Ananichuk, Ruslan Evgenyevich Kazakov
BACKGROUND: Acenocoumarol dose is normally determined via step-by-step adjustment process based on International Normalized Ratio (INR) measurements. During this time, the risk of adverse reactions is especially high. Several genotype-based acenocoumarol dosing algorithms have been created to predict ideal doses at the start of anticoagulant therapy. METHODS: Nine dosing algorithms were selected through a literature search. These were evaluated using a cohort of 63 patients with atrial fibrillation receiving acenocoumarol therapy...
May 24, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28475488/8th-santorini-conference-systems-medicine-and-personalized-health-and-therapy-santorini-greece-3-5-october-2016
#12
Sophie Visvikis-Siest, Alex-Ander Aldasoro Arguinano, Maria Stathopoulou, Ting Xie, Alexandros Petrelis, Georges Weryha, Philippe Froguel, Peter Meier-Abt, Urs A Meyer, Vid Mlakar, Marc Ansari, Andreas Papassotiropoulos, Georges Dedoussis, Baishen Pan, Roland P Bühlmann, Mario Noyer-Weidner, Pierre-Yves Dietrich, Ron Van Schaik, Federico Innocenti, Winfried März, Lynn M Bekris, Panos Deloukas
No abstract text is available yet for this article.
May 24, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28384101/novel-therapeutic-approaches-of-natural-oil-from-black-seeds-and-its-underlying-mechanisms-against-kidney-dysfunctions-in-haloperidol-induced-male-rats
#13
Jacob K Akintunde, Opeyemi K Abubakar
BACKGROUND: Antipsychotic drugs could be nephrotoxic in schizophrenia patients. METHODS: The present study investigated the protective effect of oil from black seed on kidney dysfunctions using several biological approaches in adult rats. The animals were divided into six groups (n=10): normal control rats; haloperidol (HAL)-induced rats: induced rats were pre-, co- and post-treated with black seed oil (BSO), respectively, and the last group was treated with the oil only...
May 24, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28315856/an-update-on-hla-alleles-associated-with-adverse-drug-reactions
#14
REVIEW
Ingrid Fricke-Galindo, Adrián LLerena, Marisol López-López
Adverse drug reactions (ADRs) are considered as an important cause of morbidity and mortality. The hypersensitivity reactions are immune-mediated ADRs, which are dose-independent, unpredictable and have been associated with several HLA alleles. The present review aimed to describe HLA alleles that have been associated with different ADRs in populations worldwide, the recommendations of regulatory agencies and pharmacoeconomic information and databases for the study of HLA alleles in pharmacogenetics. A systematic search was performed in June 2016 of articles relevant to this issue in indexed journals and in scientific databases (PubMed and PharmGKB)...
May 24, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28272018/genetic-polymorphisms-of-cytochrome-p450-enzymes-cyp2c9-cyp2c19-cyp2d6-cyp3a4-and-cyp3a5-in-the-croatian-population
#15
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...
March 1, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28259867/review-of-pharmacogenetics-studies-of-l-asparaginase-hypersensitivity-in-acute-lymphoblastic-leukemia-points-to-variants-in-the-gria1-gene
#16
REVIEW
Maria Lopez-Santillan, Leire Iparraguirre, Idoia Martin-Guerrero, Angela Gutierrez-Camino, Africa Garcia-Orad
Acute lymphoblastic leukemia (ALL) is a major pediatric cancer in developed countries. Although treatment outcome has improved owing to advances in chemotherapy, there is still a group of patients who experience severe adverse events. L-Asparaginase is an effective antineoplastic agent used in chemotherapy of ALL. Despite its indisputable indication, hypersensitivity reactions are common. In those cases, discontinuation of treatment is usually needed and anti-asparaginase antibody production may also attenuate asparaginase activity, compromising its antileukemic effect...
March 1, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28259866/verification-of-propofol-sulfate-as-a-further-human-propofol-metabolite-using-lc-esi-qqq-ms-and-lc-esi-qtof-ms-analysis
#17
Alexandra Maas, Christoph Maier, Beate Michel-Lauter, Sebastian Broecker, Burkhard Madea, Cornelius Hess
BACKGROUND: Propofol (2,6-diisopropylphenol) is a water-insoluble, intravenous anesthetic that is widely used for the induction and maintenance of anesthesia as well as for endoscopic and pediatric sedation. After admission, propofol undergoes extensive hepatic and extrahepatic metabolism, including direct conjugation to propofol glucuronide and hydroxylation to 2,6-diisopropyl-1,4-quinol. The latter substance subsequently undergoes phase II metabolism, resulting in the formation of further metabolites (1quinolglucuronide, 4quinolglucuronide and 4quinol-sulfate)...
March 1, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28253196/cytotoxicity-and-cytochrome-p450-inhibitory-activities-of-clinacanthus-nutans
#18
Suk Yen Quah, Jin Han Chin, Gabriel Akyirem Akowuah, Shaik Ibrahim Khalivulla, Siew Wei Yeong, Mandumpal Chacko Sabu
BACKGROUND: Clinacanthus nutans Lindau (family: Acanthaceae), also known as "Sabah Snake Grass" or "Belalai Gajah" in Malaysia, has been widely used by Malaysians due to its anticancer property. However, the anticancer activity of C. nutans leaves extract and its safe use need to be further investigated. The objectives of the present study were to evaluate the cytotoxic effects of methanol leaves extract of C. nutans in various human cancer cell lines and to evaluate the in vitro effect of C...
March 1, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28245187/influence-of-genetic-polymorphisms-of-cyp3a5-and-abcb1-on-sirolimus-pharmacokinetics-patient-and-graft-survival-and-other-clinical-outcomes-in-renal-transplant
#19
Consuelo Rodríguez-Jiménez, Mar García-Saiz, Lourdes Pérez-Tamajón, Eduardo Salido, Armando Torres
BACKGROUND: In transplant patients receiving de novo anticalcineurin-free sirolimus (SRL)-based immunosuppression, we determined the influence of cytochrome P450 3A5 (CYP3A5) and ATP-binding cassette, sub-family B (MDR/TAP), member (ABCB1) genotypes on SRL blood levels and medium-term relevant clinical outcomes, in order to improve effectiveness of immunosuppression strategies when anti-mammalian target of rapamycin (anti-mTOR) inhibitor is indicated for clinical reasons. METHODS: Forty-eight renal transplant recipients (suffered 48% diabetes mellitus, 91% hypertension, and 47% dyslipidemia) were genotyped for CYP3A5 (6986A>G) and ABCB1 (3435C>T) polymorphisms by polymerase chain reaction-restriction fragment length polymorphism...
March 1, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28231062/relationship-between-metabolic-phenotypes-and-genotypes-of-cyp1a2-and-cyp2a6-in-the-nigerian-population
#20
Ayorinde Adehin, Oluseye O Bolaji, Simran Maggo, Martin A Kennedy
BACKGROUND: CYP1A2 and CYP2A6 are polymorphic drug-metabolising enzymes that are also implicated in the activation of procarcinogens in humans. Some of their alleles and haplotypes, often varied in prevalence across populations, are thought to influence activity despite the known contribution of environmental factors. This study assessed the potential influence of some genetic variants of CYP1A2 and CYP2A6 on metabolic phenotypes in Nigerians. METHODS: Genomic DNA was extracted from blood samples of 100 healthy, unrelated subjects for whom CYP1A2 and CYP2A6 phenotypes had previously been determined, alongside an additional 80 other individuals for whom phenotype data were unavailable...
March 1, 2017: Drug Metabolism and Personalized Therapy
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