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CYP2E1

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https://www.readbyqxmd.com/read/29156840/association-between-cyp2e1-genetic-polymorphisms-and-urinary-cancer-risk-a-meta-analysis
#1
Zhiqing Fang, Yun Wu, Ning Zhang
Objective: Studies investigating the contribution of Cytochrome P4502E1 (CYP2E1) polymorphisms to the etiology of urinary cancer draw inconsistent conclusions. Thus, we performed a meta-analysis to evaluate the association between CYP2E1 Rsa I/Pst I and Dra I polymorphisms and urinary cancer susceptibility. Materials and Methods: Meta-analysis based on the eligible case-control studies that assess the association of CYP2E1 Rsa I/Pst I and Dra I polymorphisms with urinary cancer was conducted...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29156621/influence-of-shenxiong-glucose-injection-on-the-activities-of-six-cyp-isozymes-and-metabolism-of-warfarin-in-rats-assessed-using-probe-cocktail-and-pharmacokinetic-approaches
#2
Jia Sun, Yuan Lu, Yueting Li, Jie Pan, Chunhua Liu, Zipeng Gong, Jing Huang, Jiang Zheng, Lin Zheng, Yongjun Li, Ting Liu, Yonglin Wang
Shenxiong glucose injection (SGI), a traditional Chinese medicine (TCM) preparation, has been widely used for the treatment of various cardiovascular and cerebrovascular diseases for many years. We assessed the potential influences of SGI on the activities of six CYP enzymes (CYP1A2, CYP2C11, CYP2C19, CYP2D4, CYP2E1, and CYP3A2) and on the pharmacokinetics of warfarin in rats. We compared plasma pharmacokinetics of six probe drugs (caffeine/CYP1A2, tolbutamide/CYP2C11, omeprazole/CYP2C19, metoprolol/CYP2D4, chlorzoxazone/CYP2E1, and midazolam/CYP3A2) and of warfarin between control and SGI-pretreated groups, to estimate the effect on the relative activities of the six isozymes and warfarin metabolism...
November 20, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29145161/cyp450-enzyme-specific-enantioselective-species-specific-response-for-metalaxyl-in-in-vitro-hepatic-cells
#3
Wei Xie, Fangxing Yang
Although enantioselective accumulation of chiral pesticide has been reported in organisms, the mechanisms remain unclear. In this study, the effects of chiral pesticide metalaxyl on CYP1A1, CYP1A2, CYP2B1, CYP2B2, CYP2E1 and CYP3A were investigated in human hepatoma HepG2, rat hepatic H4IIE, chicken hepatic LMH and grass carp hepatic L8824 cells. Moreover, the residual concentrations and enantiomeric ratios (ERs) of metalaxyl were also detected in the medium. The results showed the responses of these CYP450s to metalaxyl were enzyme-dependent and species-dependent in the four cells...
November 13, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29136950/a-novel-sesquiterpene-glycoside-from-loquat-leaf-alleviates-oleic-acid-induced-steatosis-and-oxidative-stress-in-hepg2-cells
#4
Tunyu Jian, Yuexian Wu, Xiaoqin Ding, Han Lv, Li Ma, Yuanyuan Zuo, Bingru Ren, Lei Zhao, Bei Tong, Jian Chen, Weilin Li
Loquat (Eriobotrya japonica) leaf has displayed beneficial effect on metabolic syndrome. In our previously study, total sesquiterpene glycosides (TSG) isolated from Loquat leaf exhibited therapeutic effect on Non-alcoholic fatty liver disease (NAFLD) in vivo, but the accurate active compound remains unknown. Sesquiterpene glycoside 1 (SG1) is a novel compound, which is exclusively isolated from Loquat leaf, but its biological activity has been rarely reported. The present study was designed to evaluate the pharmacological effect of SG1, the main component of TSG, in oleic acid (OA)-induced HepG2 cell model of NAFLD with its related mechanisms of action...
November 9, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29132096/quercetin-prevents-type-1-diabetic-liver-damage-through-inhibition-of-cyp2e1
#5
Oksana Maksymchuk, Angela Shysh, Inna Rosohatska, Mykola Chashchyn
BACKGROUND: Increased CYP2E1 protein and activity levels can be the main cause of stress-mediated liver damage in diabetes. In this work we investigated the quercetin properties to prevent diabetic oxidative liver injury through inhibition of CYP2E1. METHODS: Animals were randomly divided into three groups (n=5 for each group): non-diabetic control, STZ-diabetic rats and STZ-diabetic rats administered with quercetin (50mg/kg bw, per day, during 30days). Markers of oxidative stress and liver injury, hepatocyte ultrastructure and levels of CYP2E1 protein and activity were examined using biochemical, electron microscopy and molecular biological methods...
June 24, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29129660/microduplication-of-10q26-3-in-a-chinese-hypertriglyceridemia-patient
#6
Jing-Jing Li, Ya-Qin Chen, Liang-Liang Fan, Jie-Yuan Jin, Shuai Guo, Rong Xiang
Hypertriglyceridemia (HTG) plays an important role in the development and progression of atherosclerosis. It is inherited in an autosomal dominant pattern with a frequency of approximately 1:1,000,000 worldwide. Previous study has demonstrated that more than six genes underlie this disorder. In addition, copy number variants (CNVs) including disease-causing genes also play a crucial role in it. In this study, we have employed SNP-ARRAY chip technology to detect the pathogenic CNVs in a HTG patient who carried no meaningful mutations in HTG candidate genes...
November 9, 2017: Molecular and Cellular Probes
https://www.readbyqxmd.com/read/29129047/hepaprotective-effect-of-standardized-ecklonia-stolonifera-formulation-on-ccl%C3%A2-induced-liver-injury-in-sprague-dawley-rats
#7
Jae-Hyuk Byun, Jun Kim, Se-Young Choung
The liver is an essential organ for the detoxification of exogenous xenobiotics, drugs and toxic substances. The incidence rate of non-alcoholic liver injury increases due to dietary habit change and drug use increase. Our previous study demonstrated that Ecklonia stolonifera (ES) formulation has hepatoprotective effect against alcohol-induced liver injury in rat and tacrine-induced hepatotoxicity in HepG2 cells. This present study was designated to elucidate hepatoprotective effects of ES formulation against carbon tetrachloride (CCl₄)-induced liver injury in Sprague Dawley rat...
November 13, 2017: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29125184/hepatic-and-hippocampal-cytochrome-p450-enzyme-overexpression-during-spontaneous-recurrent-seizures
#8
Leonie Runtz, Benoit Girard, Marion Toussenot, Julie Espallergues, Alexis Fayd'Herbe De Maudave, Alexandre Milman, Frederic deBock, Chaitali Ghosh, Nathalie C Guérineau, Jean-Marc Pascussi, Federica Bertaso, Nicola Marchi
OBJECTIVE: Available evidence points to a role of cytochrome P450 (Cyp) drug biotransformation enzymes in central nervous system diseases, including epilepsy. Deviations in drug pharmacokinetic profiles may impact therapeutic outcomes. Here, we ask whether spontaneous recurrent seizure (SRS) activity is sufficient to modulate the expression of major Cyp enzymes in the liver and brain. METHODS: Unilateral intrahippocampal (IH) kainic acid (KA) injections were used to elicit nonconvulsive status epilepticus (SE), epileptogenesis, and SRS, as monitored by video-electroencephalography...
November 10, 2017: Epilepsia
https://www.readbyqxmd.com/read/29124333/assessment-of-hepatotoxicity-of-first-line-anti-tuberculosis-drugs-on-wistar-rats
#9
Radhika Sharma, Ramneek Kaur, Manishi Mukesh, Vijay L Sharma
Adverse drug reactions are inevitable risk factors associated with use of modern medicines. First-line anti-tuberculosis drugs contribute to diverse pathological complications, and hepatotoxicity is one of them. This study investigated the effects of anti-TB drugs in combination (rifampicin [RIF] + isoniazid [INH] + pyrazinamide [PZA]) on Wistar rats. Rats were grouped as control group (saline), toxicant group that was given (30.85 mg/kg b.wt., INH + 61.7 mg/kg b.wt., RIF + 132.65 mg/kg b.wt. PZA in dosage extrapolated from dose that is used in human)...
November 9, 2017: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/29120493/carcinogenic-etheno-dna-adducts-in-alcoholic-liver-disease-correlation-with-cytochrome-p-4502e1-and-fibrosis
#10
Sebastian Mueller, Teresa Peccerella, Hua Qin, Katharina Glassen, Rüdiger Waldherr, Christa Flechtenmacher, Beate K Straub, Gunda Millonig, Felix Stickel, Thomas Bruckner, Helmut Bartsch, Helmut Karl Seitz
BACKGROUND & AIMS: One mechanism by which alcoholic liver disease (ALD) progresses is oxidative stress and the generation of reactive oxygen species (ROS), among others due to the induction of cytochrome P-4502E1 (CYP2E1). Experimental data underline the key role of CYP2E1 since ALD could be partially prevented in rats by the administration of the specific CYP2E1 inhibitor chlormethiazole. Since CYP2E1 is linked to the formation of carcinogenic etheno DNA-adducts in ALD patients, a causal role of alcohol induced CYP2E1 in hepatocarcinogenesis is implicated...
November 9, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/29116991/association-between-polymorphisms-of-metabolic-enzyme-genes-and-chromosomal-damage-in-benzene-exposed-workers-in-china
#11
Yan Fang, Han-Tian Wu, Yun-Jie Ye, Li-Fang Zhou, Wei Hu, Guang-Hui Zhang, Pin Sun, William Au, Zhao-Lin Xia
OBJECTIVE: To provide better understanding of genetic susceptibility for health risk among current benzene-exposed workers. METHODS: Four hundred sixty one benzene-exposed workers and 88 matched controls were recruited, and their benzene exposure doses were monitored. Associations between genetic susceptibility for polymorphisms of metabolic enzymes CYP2E1 and NQO1, and expression of cytokinesis-block micronucleus (MN) were investigated. RESULTS: Mean MN frequency in the exposed workers was significantly higher than that in the control group (P < 0...
November 2017: Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/29113331/cross-sectional-associations-between-genetic-polymorphisms-in-metabolic-enzymes-and-longer-leukocyte-telomere-length-induced-by-omethoate
#12
Xiaoran Duan, Yongli Yang, Sihua Wang, Xiaolei Feng, Tuanwei Wang, Pengpeng Wang, Suxiang Liu, Lei Li, Guoyu Li, Wu Yao, Liuxin Cui, Wei Wang
Purpose: This study aimed to explore the effects of genetic polymorphisms in metabolic enzymes on relative telomere length changes and explore the mechanism of canceration induced by omethoate. Materials and Methods: 180 long-term omethoate-exposed workers and 115 healthy controls were recruited. Real-time PCR method was applied to determine the relative telomere length in peripheral blood leukocytes DNA, and Six polymorphic loci of GSTT1(+/-), GSTM1(+/-), GSTP1 rs1695, CYP2E1 rs6413432, CYP2E1 rs3813867 and PON2 rs12026 were detected by polymerase chain reaction and restriction fragment length polymorphism method; Multiple linear regression was conducted to explore the effects of omethoate exposure and genetic polymorphisms on the telomere length...
October 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/29093747/hepatoprotective-properties-of-penthorum-chinense-pursh-against-carbon-tetrachloride-induced-acute-liver-injury-in-mice
#13
Meng Wang, Xiao-Jiao Zhang, Ruibing Feng, Yun Jiang, Da-Yong Zhang, Chengwei He, Peng Li, Jian-Bo Wan
Background: Penthorum chinense Pursh (Penthoraceae, PCP), a well-known Miao ethnomedicine, has been traditionally used to treat several liver-related diseases, such as jaundice and viral hepatitis. The aims of the present study were to evaluate the probable properties of the aqueous extract of PCP on carbon tetrachloride (CCl4)-induced acute liver injury in mice. Methods: C57BL/6 mice were orally administered an aqueous extract of PCP (5.15 and 10.3 g/kg BW) or silymarin (100 mg/kg) once daily for 1 week prior to CCl4 exposure...
2017: Chinese Medicine
https://www.readbyqxmd.com/read/29091817/effect-of-repeated-administration-of-4-methylpyrazole-on-renal-function-and-lipid-peroxidation-products-in-rat-kidney-after-ethylene-glycol-poisoning
#14
Karina Sommerfeld-Klatta, Jędrzej Przystanowicz, Joanna Kowalówka-Zawieja, Barbara Zielińska-Psuja
Toxic effects of ethylene glycol (EG) and its metabolites are mainly related to metabolic acidosis and kidney damage. EG biotransformation involving CYP2E1 affects the oxidant-antioxidant balance. The study assessed the effect of repeated administration of 4-methylpyrazole (4MP, 15mg/kg b.w. after 2h, followed by 10mg/kg b.w. every 12h) on renal function (creatinine, urea and urinary protein levels) as well as products of kidney's lipid peroxidation (MDA and TBARS levels) in rats poisoned with EG (5745mg/kg b...
October 10, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/29079577/structural-and-functional-effects-of-cytochrome-b5-interactions-with-human-cytochrome-p450-enzymes
#15
Aaron G Bart, Emily E Scott
The small heme-containing protein cytochrome b5 can facilitate, inhibit, or have no effect on cytochrome P450 catalysis, often in a P450-dependent and substrate-dependent manner that is not well understood. Herein solution NMR was used to identify b5 residues interacting with different human drug-metabolizing P450 enzymes. NMR results revealed that P450 enzymes bound to either b5 α4-5 (CYP2A6 and CYP2E1) or this region and α2-3 (CYP2D6 and CYP3A4) and suggested variation in the affinity for b5 Mutations of key b5 residues suggest that not only are different b5 surfaces responsible for binding different P450 enzymes, but that these different complexes are relevant to the observed effects on P450 catalysis...
October 27, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29059455/angiocrine-wnt-signaling-controls-liver-growth-and-metabolic-maturation-in-mice
#16
Thomas Leibing, Cyrill Géraud, Iris Augustin, Michael Boutros, Hellmut G Augustin, Jürgen G Okun, Claus-Dieter Langhans, Johanna Zierow, Sebastian A Wohlfeil, Victor Olsavszky, Kai Schledzewski, Sergij Goerdt, Philipp-Sebastian Koch
Postnatal liver development is characterized by hepatocyte growth, proliferation and functional maturation. Notably, canonical Wnt signaling in hepatocytes has been identified as an important regulator of final adult liver size and metabolic liver zonation. The cellular origin of Wnt ligands responsible for homeostatic liver/body weight ratio remained unclear, which was also attributable to a lack of suitable endothelial Cre driver mice. To comprehensively analyze the effects of hepatic angiocrine Wnt signaling on liver development and metabolic functions, we used endothelial subtype-specific Stab2-Cre driver mice to delete Wls from hepatic endothelial cells (HEC)...
October 23, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29056914/acetaminophen-induced-liver-injury-alters-the-acyl-ethanolamine-based-anti-inflammatory-signaling-system-in-liver
#17
Patricia Rivera, Antoni Pastor, Sergio Arrabal, Juan Decara, Antonio Vargas, Laura Sánchez-Marín, Francisco J Pavón, Antonia Serrano, Dolores Bautista, Anna Boronat, Rafael de la Torre, Elena Baixeras, M Isabel Lucena, Fernando R de Fonseca, Juan Suárez
Protective mechanisms against drug-induced liver injury are actively being searched to identify new therapeutic targets. Among them, the anti-inflammatory N-acyl ethanolamide (NAE)-peroxisome proliferators activated receptor alpha (PPARα) system has gained much interest after the identification of its protective role in steatohepatitis and liver fibrosis. An overdose of paracetamol (APAP), a commonly used analgesic/antipyretic drug, causes hepatotoxicity, and it is being used as a liver model. In the present study, we have analyzed the impact of APAP on the liver NAE-PPARα system...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29049217/identification-of-novel-therapeutic-target-genes-and-pathway-in-pancreatic-cancer-by-integrative-analysis
#18
Bangli Hu, Cheng Shi, Hai-Xing Jiang, Shan-Yu Qin
BACKGROUND: Gene alterations are crucial to the molecular pathogenesis of pancreatic cancer. The present study was designed to identify the potential candidate genes in the pancreatic carcinogenesis. METHODS: Gene Expression Omnibus database (GEO) datasets of pancreatic cancer tissue were retrieval and the differentially expressed genes (DEGs) from individual microarray data were merged. Gene Ontology (GO) enrichment analysis, Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis, protein-protein interaction (PPI) networks, and gene coexpression analysis were performed...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29043584/determination-of-the-human-cytochrome-p450-monooxygenase-catalyzing-the-enantioselective-oxidation-of-2-2-3-5-6-pentachlorobiphenyl-pcb-95-and-2-2-3-4-4-5-6-heptachlorobiphenyl-pcb-183
#19
Haruna Nagayoshi, Kensaku Kakimoto, Yoshimasa Konishi, Keiji Kajimura, Takeshi Nakano
2,2',3,5',6-Pentachlorobiphenyl (PCB 95) and 2,2',3,4,4',5',6-heptachlorobiphenyl (PCB 183) possess axial chirality and form the aS and aR enantiomers. The enantiomers of these congeners have been reported to accumulate in the human body enantioselectively via unknown mechanisms. In this study, we determined the cytochrome P450 (CYP) monooxygenase responsible for the enantioselective oxidization of PCB 95 and PCB 183, using a recombinant human CYP monooxygenase. We evaluated 13 CYP monooxygenases, namely CYP1A1, CYP1A2, CYP1B1, CYP2A6, CYP2B6, CYP2C8, CYP2C19, CYP2E1, CYP2J2, CYP3A4, CYP3A5, CYP4F2, and aromatase (CYP19), and revealed that CYP2A6 preferably oxidizes aS-PCB 95 enantioselectively; however, it did not oxidize PCB 183...
October 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29036399/use-of-a-crossed-high-alcohol-preferring-chap-mouse-model-with-the-niaaa-model-of-chronic-binge-ethanol-intake-to-study-liver-injury
#20
Kyle J Thompson, Shayan S Nazari, W Carl Jacobs, Nicholas J Grahame, Iain H McKillop
Aims: This study sought to compare mice bred to preferentially consume high amounts of alcohol (crossed-high alcohol preferring, cHAP) to c57BL/6 (C57) mice using a chronic-binge ethanol ingestion model to induce alcoholic liver disease (ALD). Methods: Male C57 and cHAP mice were randomized to a Lieber-DeCarli control (LDC) diet, Lieber-DeCarli 5% (v/v) ethanol (LDE) diet or free-choice between 10% (v/v) ethanol in drinking water (EtOH-DW) and DW. After 4 weeks mice were gavaged with either 9 g/kg maltose-dextrin (LDC+MD) or 5 g/kg EtOH (LDE+Binge, EtOH-DW+Binge)...
September 20, 2017: Alcohol and Alcoholism: International Journal of the Medical Council on Alcoholism
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