keyword
MENU ▼
Read by QxMD icon Read
search

ABCB1

keyword
https://www.readbyqxmd.com/read/28092857/universal-efavirenz-determination-in-transport-study-rat-placenta-perfusion-and-placenta-lysate-by-hplc-uv
#1
Lucie Zelena, Josef Reznicek, Martina Ceckova, Hana Sklenarova
Efavirenz is an antiretroviral drug used in the treatment of HIV-positive patients. A simple, fast and sensitive high-performance liquid chromatography (HPLC) method was developed in order to determine efavirenz in three types of samples provided from pharmacokinetic studies. The analysis took 5min and was performed using a C18 analytical column (Discovery HS C18, 150×4.6mm, particle size of 5μm) in isocratic mode with a mobile phase containing acetonitrile and water (65:35, v/v), a flow rate of 1.6mLmin(-1), a sample volume of 10μL and UV detection at 245nm...
January 11, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28090646/influence-of-p-glycoprotein-on-the-disposition-of-fexofenadine-and-its-enantiomers
#2
Fei Li, Karyn D Howard, Michael J Myers
OBJECTIVES: P-glycoprotein (P-gp) is responsible for the efflux of a broad variety of human and veterinary drugs. Canine P-gp polymorphisms alter drug disposition and toxicity, but their impact on the disposition of enantiomeric drugs is unknown. Using fexofenadine as a model compound, we developed and validated HPLC-fluorescence methods to determine the effect of P-gp on the disposition of fexofenadine and its enantiomers. METHODS: A chiral CD-Ph column was used for the separation of (R) and (S)-fexofenadine...
January 16, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28079463/influence-of-abcb1-polymorphisms-and-serum-concentrations-on-venlafaxine-response-in-patients-with-major-depressive-disorder
#3
Gul Ozbey, Feryal Cam Celikel, Birgul Elbozan Cumurcu, Derya Kan, Berna Yucel, Ekrem Hasbek, Ferda Percin, Ismail Cüneyt Guzey, Canan Uluoglu
BACKGROUND: The pharmacokinetics and the pharmacodynamics of antidepressants show large inter-individual variations which result in unpredictable clinical responses. AIM: The aim of the study was to examine the effect of ABCB1 polymorphisms and the serum concentrations on the efficacy and tolerability of venlafaxine in patients with major depressive disorder (MDD). METHODS: Fifty-two outpatients who met the Diagnostic and Statistical Manual of Mental Disorders Fourth Edition (DSM-IV) criteria for MDD were recruited for the study...
January 12, 2017: Nordic Journal of Psychiatry
https://www.readbyqxmd.com/read/28076455/decreased-platelet-responsiveness-to-clopidogrel-correlates-with-cyp2c19-and-pon1-polymorphisms-in-atherosclerotic-patients
#4
J F M Marchini, M R Pinto, G C Novaes, A V Badran, R B Pavão, G L Figueiredo, I M Lago, M O Lima-Filho, D C Lemos, M Tonani, C M Antloga, L Oliveira, J C Lorenzi, J A Marin-Neto
Clopidogrel and aspirin are the most commonly used medications worldwide for dual antiplatelet therapy after percutaneous coronary intervention. However, clopidogrel hyporesponsiveness related to gene polymorphisms is a concern. Populations with higher degrees of genetic admixture may have increased prevalence of clopidogrel hyporesponsiveness. To assess this, we genotyped CYP2C19, ABCB1, and PON1 in 187 patients who underwent percutaneous coronary intervention. Race was self-defined by patients. We also performed light transmission aggregometry with adenosine diphosphate (ADP) and arachidonic acid during dual antiplatelet therapy...
January 9, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28074308/influence-of-ts-and-abcb1%C3%A2-gene-polymorphisms-on-survival-outcomes-of-5%C3%A2-fu-based-chemotherapy-in-a%C3%A2-chinese-population-of-advanced-gastric-cancer-patients
#5
Jun Chen, Xueming Ying, Ling Zhang, Xiaojun Xiang, Jianping Xiong
To investigate the impacts of gene variations on survival outcomes of advanced gastric cancer (AGC) patients treated with 5‑fluorouracil (5-FU)-based chemotherapy, we analyzed the associations of 2 indels of the TS gene rs34743033 (double or triple tandem repeats of a 28 bp sequence in 5'-UTR, denoted as 2R or 3R allele) and rs16430 (a 6 bp variation at 1494 bp in 3'-UTR, denoted as ins6 or del6 allele) and 2 single nucleotide polymorphisms (SNPs) of ABCB1gene rs2032582 in exon 21 and rs1045642 in exon 26, with clinical outcomes after 5‑FU treatment...
January 10, 2017: Wiener Klinische Wochenschrift
https://www.readbyqxmd.com/read/28070879/a-review-of-pharmacogenetics-of-antimalarials-and-associated-clinical-implications
#6
REVIEW
Hazem Elewa, Kyle John Wilby
Genetic variability in drug-metabolizing enzymes and drug transporters is known to influence the pharmacokinetics of many drugs. Antimalarial drugs are a class of agents known to utilize metabolic and elimination pathways prone to genetic variation. This paper aims to review the genetic variants affecting antimalarial medications and discuss their clinical implications. Data were identified for the genes coding for the cytochrome P450 (CYP) enzymes: CYP2C8, CYP2C19, CYP2A6, CYP2D6, CYP2B6, and the P-glycoprotein drug transporter...
January 9, 2017: European Journal of Drug Metabolism and Pharmacokinetics
https://www.readbyqxmd.com/read/28067781/gestational-zearalenone-exposure-causes-reproductive-and-developmental-toxicity-in-pregnant-rats-and-female-offspring
#7
Xin Gao, Lvhui Sun, Niya Zhang, Chong Li, Jiacai Zhang, Zhuohui Xiao, Desheng Qi
Zearalenone (ZEN) is an oestrogenic mycotoxin commonly found in food and feed products and can affect reproduction and development in both humans and animals. This study aimed to determine the toxic effects of ZEN on maternal SD rats and the F1 female offspring. Sixty-four pregnant rats were divided into 4 groups and exposed to feed contaminated with ZEN (0, 5, 10, and 20 mg/kg feed) on gestational days (GDs) 0-21. Compared with the controls, the groups exposed to 10 and 20 mg/kg ZEN showed significantly decreased feed intake and body weight of pregnant rats and/or female offspring...
January 5, 2017: Toxins
https://www.readbyqxmd.com/read/28066799/the-study-protocol-for-a-non-randomized-controlled-clinical-trial-using-a-genotype-guided-strategy-in-a-dataset-of-patients-who-undergone-percutaneous-coronary-intervention-with-stent
#8
Cristina Lucía Dávila-Fajardo, Jesús Sánchez-Ramos, Xando Diaz- Villamarín, Luis Javier Martínez-González, Pablo Toledo Frías, Susana Martínez Huertas, Francisco Burillo Gómez, Juan Caballero Borrego, Alicia Bautista Pavés, Mª Carmen Marín Guzmán, José Antonio Ramirez Hernández, Concepción Correa Vilches, Jose Cabeza Barrera
This article contains data related to the research article entitled "Results of genotype-guided antiplatelet therapy in patients undergone percutaneous coronary intervention with stent" (J. Sánchez-Ramos, C.L. Dávila-Fajardo, P. Toledo Frías, X. Díaz Villamarín, L.J. Martínez-González, S. Martínez Huertas, F. Burillo Gómez, J. Caballero Borrego, A. Bautista Pavés, M.C. Marín Guzmán, J.A. Ramirez Hernández, C. Correa Vilches, J. Cabeza Barrera, 2016) (1). This data article reports, for the first time, about the non-randomized clinical trial protocol that check if CYP2C19/ABCB1 genotype-guided strategy in which the choice of antiplatelet therapy is based on the genetic test, reduces the rates of cardiovascular events and bleeding compared to a non-tailored strategy in patients undergone percutaneous coronary intervention (PCI) with stent...
February 2017: Data in Brief
https://www.readbyqxmd.com/read/28063968/lack-of-genetic-association-between-oct1-abcb1-and-ugt2b7-variants-and-morphine-pharmacokinetics
#9
L M Nielsen, E Sverrisdóttir, T B Stage, S Feddersen, K Brøsen, L L Christrup, A M Drewes, A E Olesen
AIM: A high inter-individual variation in the pharmacokinetics and pharmacodynamics of morphine has been observed. Genetic polymorphisms in genes encoding the organic cation transporter isoform 1 (OCT1), the efflux transporter p-glycoprotein (ABCB1), and the UDP-glucuronosyltransferase-2B7 (UGT2B7) may influence morphine pharmacokinetics and thus, also pharmacodynamics. The aim of this study was to evaluate the association between OCT1, ABCB1, and UGT2B7 variants, and morphine pharmacokinetics and -dynamics in healthy volunteers...
January 4, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28061549/fast-and-simple-detection-methods-for-the-4-base-pair-deletion-of-canine-mdr1-abcb1-gene-by-pcr-and-isothermal-amplification
#10
Cathrin P Stiedl, Karin Weber
Dogs with a 4-bp deletion in the MDR1 (or ABCB1) gene show intolerance to certain drugs routinely used in veterinary medicine, such as ivermectin, vincristine, and doxorubicin. The mutation leads to a dysfunctional P-glycoprotein drug transporter, which results in drug accumulation in the brain and severe neurotoxicity. A rapid and accurate in-house test to determine the genotype of patients in cases of acute neurotoxic signs or in tumor patients is desirable. We describe a cost-effective detection method with simple technical equipment for veterinary practice...
January 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28061365/primer-design-for-snp-genotyping-based-on-allele-specific-amplification-application-to-organ-transplantation-pharmacogenomics
#11
Luis A Tortajada-Genaro, Rosa Puchades, Ángel Maquieira
Diagnostic methods based on single nucleotide polymorphism (SNP) biomarkers are essential for the real adoption of personalized medicine. Allele specific amplification in a homogeneous format or combined to microarray hybridization are powerful approaches for SNP genotyping. However, primers must be properly selected to minimize cross-reactivity, dimer formation and nonspecific hybridization. This study presents a design workflow diagram for the selection of required oligonucleotides for multiplex assays. Based on thermodynamic restrictions, the oligonucleotide sets are chosen for a specific amplification of wild- and mutant-type templates...
December 29, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28057098/-association-of-abcb1-gene-polymorphisms-with-aspirin-resistance-in-patients-with-ischemic-stroke
#12
Z Y Wang, Y Wang, A H Sui, Y Dong
Objective: To investigate the relationship of single nucleotide polymorphisms of Multi-drug resistance (ABCB1/MDR1) gene with Aspirin resistance (AR) in patients with ischemic stroke. Methods: Three hundred ischemic stroke patients from Department of Neurology, Affiliated Hospital of Qingdao University were collected from September 2014 to May 2016. According to the results of Thromboelastogram (TEG), the patients were divided into aspirin resistance (AR) group and aspirin sensitive (AS) group. The genotypes of ABCB1 gene (C1236T, G2677T/A, C3435T) were detected by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and direct sequencing...
December 20, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28052106/a-prediction-algorithm-for-drug-response-in-patients-with-mesial-temporal-lobe-epilepsy-based-on-clinical-and-genetic-information
#13
Mariana S Silva-Alves, Rodrigo Secolin, Benilton S Carvalho, Clarissa L Yasuda, Elizabeth Bilevicius, Marina K M Alvim, Renato O Santos, Claudia V Maurer-Morelli, Fernando Cendes, Iscia Lopes-Cendes
Mesial temporal lobe epilepsy is the most common form of adult epilepsy in surgical series. Currently, the only characteristic used to predict poor response to clinical treatment in this syndrome is the presence of hippocampal sclerosis. Single nucleotide polymorphisms (SNPs) located in genes encoding drug transporter and metabolism proteins could influence response to therapy. Therefore, we aimed to evaluate whether combining information from clinical variables as well as SNPs in candidate genes could improve the accuracy of predicting response to drug therapy in patients with mesial temporal lobe epilepsy...
2017: PloS One
https://www.readbyqxmd.com/read/28050891/a-novel-mechanism-governing-the-transcriptional-regulation-of-abc-transporters-in-mdr-cancer-cells
#14
Jamie F Lu, Deep Pokharel, Mary Bebawy
P-glycoprotein (P-gp/ABCB1) and multidrug resistance-associated protein 1 (MRP1/ABCC1) are the main drug efflux transporters associated with treatment failure in cancer. Much attention has been focused on the molecular mechanisms regulating the expression of these transporters as a viable approach for identifying novel drug targets in circumventing cancer multidrug resistance (MDR) clinically. In this paper, we examine the role of miR-326 in the context of its intercellular transfer between cancer cells by extracellular membrane vesicles called microparticles (MPs)...
January 3, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28042875/the-pik3-mtor-dual-inhibitor-bez235-suppresses-proliferation-and-migration-and-reverses-multidrug-resistance-in-acute-myeloid-leukemia
#15
Lan Deng, Ling Jiang, Xiang-Hua Lin, Kuo-Fu Tseng, Yuan Liu, Xing Zhang, Rui-Hong Dong, Zhi-Gang Lu, Xiu-Ju Wang
Aberrant activation of the PI3K/Akt/mTOR pathway contributes to the proliferation of malignant cells, and may confer resistance to chemotherapy in various malignancies, including acute myeloid leukemia (AML). Chemoresistance is the major reason for relapse in AML. RAD001 (everolimus) has been used at d1 and d7 of an induction chemotherapy regimen for AML, which has acceptable toxicity and may improve conventional chemotherapeutic treatment. Dual inhibitors of PI3K and mTOR overcome some of the intrinsic disadvantages of rapamycin and its derivatives...
January 2, 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/28039704/abcb1-c3435t-polymorphism-and-breast-cancer-risk-a-case-control-study-and-a-meta-analysis
#16
Alireza Sharif, Davood Kheirkhah, Mohammad Reza Sharif, Mohammad Karimian, Zahra Karimian
PURPOSE: To investigate the association of ABCB1-C3435T transition with breast cancer risk which was followed by a meta-analysis. METHODS: In a case-control study we collected blood samples from 290 women (including 150 breast cancer patients and 140 healthy controls). ABCB1-C3435T genotyping was performed by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method. A meta-analysis was performed for a total of 13 eligible studies involving 5,835 cases and 8,178 controls...
November 2016: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/28032595/prospective-identification-of-resistance-mechanisms-to-hsp90-inhibition-in-kras-mutant-cancer-cells
#17
Arefeh Rouhi, Christina Miller, Sarah Grasedieck, Stefanie Reinhart, Britta Stolze, Hartmut Döhner, Florian Kuchenbauer, Lars Bullinger, Stefan Fröhling, Claudia Scholl
Inhibition of the HSP90 chaperone results in depletion of many signaling proteins that drive tumorigenesis, such as downstream effectors of KRAS, the most commonly mutated human oncogene. As a consequence, several small-molecule HSP90 inhibitors are being evaluated in clinical trials as anticancer agents. To prospectively identify mechanisms through which HSP90-dependent cancer cells evade pharmacologic HSP90 blockade, we generated multiple mutant KRAS-driven cancer cell lines with acquired resistance to the purine-scaffold HSP90 inhibitor PU-H71...
December 9, 2016: Oncotarget
https://www.readbyqxmd.com/read/28030534/single-nucleotide-polymorphism-of-cyp3a5-impacts-the-exposure-to-tacrolimus-in-pediatric-renal-transplant-recipients-a-pharmacogenetic-substudy-of-the-twist-trial
#18
Heiko Billing, Britta Höcker, Alexander Fichtner, Rita van Damme-Lombaerts, Styrbjorn Friman, Jenö Jaray, Karel Vondrak, Eniko Sarvary, Luca Dello Strologo, Michael Oellerich, Nicolas von Ahsen, Burkhard Tönshoff
BACKGROUND: The pharmacokinetics (PK) of tacrolimus (TAC) and mycophenolic acid (MPA) are highly variable. An impact of single-nucleotide polymorphisms (SNPs) of the genes coding for enzymes and transporters involved in the PK of TAC and/or MPA is intuitively conceivable. Accordingly, we sought to analyze the influence of different SNPs on TAC and MPA exposure in pediatric renal transplant recipients. METHODS: A subpopulation of 37 patients (median age: 12.8 years, range 2...
November 24, 2016: Therapeutic Drug Monitoring
https://www.readbyqxmd.com/read/28028769/are-polymorphisms-in-genes-relevant-to-drug-disposition-predictors-of-susceptibility-to-drug-induced-liver-injury
#19
Ann K Daly
Despite considerable progress in identifying specific HLA alleles as genetic risk factors for some forms of drug-induced liver injury, progress in understanding whether genetic polymorphisms relevant to drug disposition also contribute to risk for developing this serious toxicity has been more limited. Evidence from both candidate-gene case control studies and genome-wide association studies is now discussed. In the case of genes relevant to drug metabolism, polymorphisms in cytochromes P450, UDP-glucuronosyltransferases, N-acetyltransferases and glutathione S-transferases as risk factors for DILI are assessed...
December 27, 2016: Pharmaceutical Research
https://www.readbyqxmd.com/read/28025333/modulation-of-bilirubin-neurotoxicity-by-the-abcb1-transporter-in-the-ugt1-lethal-mouse-model-of-neonatal-hyperbilirubinemia
#20
Luka Bočkor, Giulia Bortolussi, Simone Vodret, Alessandra Iaconcig, Jana Jašprová, Jaroslav Zelenka, Libor Vitek, Claudio Tiribelli, Andrés F Muro
Moderate neonatal jaundice is the most common clinical condition during newborn life. However, a combination of factors may result in acute hyperbilirubinemia, placing infants at risk of developing bilirubin encephalopathy and death by kernicterus. While most risk factors are known, the mechanisms acting to reduce susceptibility to bilirubin neurotoxicity remain unclear. The presence of modifier genes modulating the risk of developing bilirubin-induced brain damage is increasingly being recognised. The Abcb1 and Abcc1 members of the ABC family of transporters have been suggested to have an active role in exporting unconjugated bilirubin from the central nervous system into plasma...
December 25, 2016: Human Molecular Genetics
keyword
keyword
20342
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"