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CYP2J2

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https://www.readbyqxmd.com/read/29098037/role-of-cytochrome-p450-2j2-on-cell-proliferation-and-resistance-to-an-anticancer-agent-in-hepatocellular-carcinoma-hepg2-cells
#1
Geun Hye Hwang, So Mi Park, Ho Jae Han, Kyoung Min Baek, Joong Sun Kim, Woochul Chang, Ho Jin Lee, Seung Pil Yun, Jung Min Ryu, Min Young Lee
The present study examined the role of human cytochrome P450 2J2 (CYP2J2) on cell proliferation and resistance to an anticancer agent using stable hepatocellular carcinoma HepG2 cells overexpressing CYP2J2. Overexpression of CYP2J2 significantly increased HepG2 cell proliferation and the expression levels of cell cycle regulatory proteins, including cyclin D1, cyclin E, cyclin-dependent kinase (Cdk)2 and Cdk4. CYP2J2-overexpressing HepG2 cells exhibited high levels of Akt phosphorylation compared with those observed in wild-type HepG2 cells...
November 2017: Oncology Letters
https://www.readbyqxmd.com/read/29046152/cerebral-small-vessel-disease-is-associated-with-genetic-variations-in-cyp2j
#2
Ming Yao, Daping Lv, Jiajia Huo, Zhongwu Sun
BACKGROUND: Cerebral small vessel disease (SVD) can cause cognitive impairment, disability, and dementia. While it's still unclear about the pathogenesis of SVD, several risk factors of SVD have been identified, and studies suggested that hypertension may play a critical role in SVD. Furthermore, studies have demonstrated that CYP2J2 isoform, 50 G>T variant, is associated with increase the risk of ischemic stroke. Thus, we hypothesized that CYP2J2 50 G>T variant is associated with increased risk of cerebral SVD...
October 17, 2017: Current Neurovascular Research
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
#3
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/29022765/polymorphisms-in-genes-involved-in-vasoactive-eicosanoid-synthesis-affect-cardiovascular-risk-in-renal-transplant-recipients
#4
Guillermo Gervasini, Enrique Luna, Guadalupe Garcia-Pino, Lilia Azevedo, Sonia Mota-Zamorano, Juan José Cubero
OBJECTIVE: Arachidonic acid metabolism by cytochrome P450 (CYP) epoxygenases leads to epoxyeicosatrienoic acids (EETs), which are eicosanoids with vasodilator and anti-inflammatory properties. We aim to determine whether genetic variability in these routes may contribute to cardiovascular (CV) risk in renal transplant recipients. METHODS: In a cohort of 355 patients, we determined the presence of two polymorphisms, CYP2C8*3 and CYP2J2*7, known to affect eicosanoid levels...
November 8, 2017: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/28958841/effects-of-dronedarone-amiodarone-and-their-active-metabolites-on-sequential-metabolism-of-arachidonic-acid-to-epoxyeicosatrienoic-and-dihydroxyeicosatrienoic-acids
#5
Aneesh Karkhanis, Nhan Dai Thien Tram, Eric Chun Yong Chan
Cardiac enzymes such as cytochrome P450 2J2 (CYP2J2) metabolize arachidonic acid (AA) to cardioprotective epoxyeicosatrienoic acids (EETs), which in turn are metabolized by soluble epoxide hydrolase (sEH) to dihydroxyeicosatrienoic acids (DHETs). As EETs and less potent DHETs exhibit cardioprotective and vasoprotective functions, optimum levels of cardiac EETs are paramount in cardiac homeostasis. Previously, we demonstrated that dronedarone, amiodarone and their main metabolites, namely N-desbutyldronedarone (NDBD) and N-desethylamiodarone (NDEA), potently inhibit human cardiac CYP2J2-mediated astemizole metabolism in vitro...
September 25, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28939879/differential-expression-and-co-expression-gene-networks-reveal-candidate-biomarkers-of-boar-taint-in-non-castrated-pigs
#6
Markus Drag, Ruta Skinkyté-Juskiené, Duy N Do, Lisette J A Kogelman, Haja N Kadarmideen
Boar taint (BT) is an offensive odour or taste observed in pork from a proportion of non-castrated male pigs. Surgical castration is effective in avoiding BT, but animal welfare issues have created an incentive for alternatives such as genomic selection. In order to find candidate biomarkers, gene expression profiles were analysed from tissues of non-castrated pigs grouped by their genetic merit of BT. Differential expression analysis revealed substantial changes with log-transformed fold changes of liver and testis from -3...
September 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28938665/meta-analysis-of-the-association-of-the-cyp2j2-g-50t-polymorphism-with-coronary-artery-disease
#7
Jian Chen, Dong-Fei Wang, Guo-Dong Fu, Jie Ding, Lei-Yang Chen, Jia-Lan Lv, Juan Fang, Xiang Yin, Xiao-Gang Guo
The association of the CYP2J2 G-50T polymorphism with coronary artery disease has been explored, but the results remain controversial. Thus, a meta-analysis was conducted to provide a comprehensive estimate of this association. We selected ten articles encompassing 12 independent case-control studies with 7063 cases and 10,453 controls for this meta-analysis. Overall, we found significant associations between the CYP2J2 G-50T polymorphism and coronary artery disease risk in three genetic models (allele model: odds ratio (OR) = 1...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28934153/inhibitory-effect-of-selaginellins-from-selaginella-tamariscina-beauv-spring-against-cytochrome-p450-and-uridine-5-diphosphoglucuronosyltransferase-isoforms-on-human-liver-microsomes
#8
Jae-Kyung Heo, Phi-Hung Nguyen, Won Cheol Kim, Nguyen Minh Phuc, Kwang-Hyeon Liu
Selaginella tamariscina (Beauv.) has been used for traditional herbal medicine for treatment of cancer, hepatitis, and diabetes in the Orient. Numerous bioactive compounds including alkaloids, flavonoids, lignans, and selaginellins have been identified in this medicinal plant. Among them, selaginellins having a quinone methide unit and an alkylphenol moiety have been known to possess anticancer, antidiabetic, and neuroprotective activity. Although there have been studies on the biological activities of selaginellins, their modulatory potential of cytochrome P450 (P450) and uridine 5'-diphosphoglucuronosyltransferase (UGT) activities have not been previously evaluated...
September 21, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28881620/eets-reduces-lps-induced-hyperpermeability-by-targeting-grp78-mediated-src-activation-and-subsequent-rho-rock-signaling-pathway
#9
Ruolan Dong, Danli Hu, Yan Yang, Zhihui Chen, Menglu Fu, Dao Wen Wang, Xizhen Xu, Ling Tu
Integrity of endothelial barrier is a determinant of the prognosis in the acute lung injury caused by sepsis. The epoxyeicosatrienoic acids (EETs), metabolites of arachidonic acid, exhibit protective effects in various pathogenic states, however, whether EETs play a role in endothelial barrier enhancement and the involved mechanisms remain to be investigated. Here, we show that increased EETs level by endothelial specific cytochrome P450 epoxygenase 2J2 over-expression and soluble epoxide hydrolase (sEH) inhibitor TPPU reduced lipopolysaccharide-induced endothelial hyper-permeability in vivo, accompanied by improved survival of septic mice...
August 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28867723/the-inhibitory-effect-of-telmisartan-on-the-metabolism-of-arachidonic-acid-by-cyp2c9-and-cyp2c8-an-in-vitro-study
#10
Yuka Kato, Yuji Mukai, Anders Rane, Nobuo Inotsume, Takaki Toda
Epoxyeicosatorienoic acids (EETs) are generated from arachidonic acid (AA) by CYPs. EETs comprise four regioisomers (14,15-, 11,12-, 8,9-, and 5,6-EET). EETs show potent physiological effects, including vasodilation, anti-inflammation, myocardial preconditioning, and anti-platelet aggregation effects. We recently demonstrated that telmisartan, one of angiotensin II receptor blockers, inhibits AA metabolism by CYP enzymes, including CYP2C8, CYP2C9, and CYP2J2. We conducted studies of AA metabolism using recombinant CYP enzymes to estimate the inhibition constant and the type of inhibition by telmisartan of CYP2C9 and CYP2C8...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28866862/acetylshikonin-is-a-novel-non-selective-cytochrome-p450-inhibitor
#11
Jong Cheol Shon, Nguyen Minh Phuc, Won Cheol Kim, Jae Kyung Heo, Zhexue Wu, Hyunyoung Lee, Kwang-Hyeon Liu
Acetylshikonin is biologically active compound with anti-cancer and anti-inflammatory activity, which is isolated from the root of Lithospermum erythrorhizoma. We have recently discovered a inhibitory effect of acetylshikonin against CYP2J2 activity. Based on this result, we expanded our study to evaluate the inhibitory effects of acetylshikonin against nine different cytochrome P450 (P450) isoforms in human liver microsomes (HLMs) using substrate cocktails incubation assay. Acetylshikonin showed strong inhibitory effect against all P450s tested with IC50 values of 1...
September 3, 2017: Biopharmaceutics & Drug Disposition
https://www.readbyqxmd.com/read/28835442/cyp-mediated-sulfoximine-de-imination-of-azd6738
#12
Barry C Jones, Roshini Markandu, Chungang Gu, Graeme Scarfe
In hepatic S9 and human liver microsomes (HLM) the sulfoximine moiety of the ATR inhibitor AZD6738 is metabolised to its corresponding sulfoxide (AZ8982) and sulfone (AZ0002). The initial de-imination to AZ8982 is nominally a reductive reaction but in HLM required NADPH and was inhibited by 1-aminobenzotriazole (ABT) at 1mM. Studies in a panel of 11 recombinant cytochrome P450s (CYPs) - CYP1A2, CYP2A6, CYP2B6, CYP2C8, CYP2C9, CYP2C19, CYP2D6, CYP2E1 CYP2J2, CYP3A4 and CYP3A5 - confirmed that the de-imination was an oxidative process, mediated largely by CYP2C8 with some CYP2J2 involvement, whilst the subsequent oxidation to the sulfone was carried out largely by CYP2J2, CYP3A4 and CYP3A5...
August 23, 2017: Drug Metabolism and Disposition: the Biological Fate of Chemicals
https://www.readbyqxmd.com/read/28763798/meta-analysis-of-the-association-of-the-cyp2j2-g-50t-polymorphism-with-coronary-artery-disease
#13
Jian Chen, Dong-Fei Wang, Guo-Dong Fu, Jie Ding, Lei-Yang Chen, Jia-Lan Lv, Juan Fang, Xiang Yin, Xiao-Gang Guo
The association of the CYP2J2 G-50T polymorphism with coronary artery disease has been explored, but the results remain controversial. Thus, a meta-analysis was conducted to provide a comprehensive estimate of this association. We selected ten articles encompassing 12 independent case-control studies with 7063 cases and 10,453 controls for this meta-analysis. Overall, we found significant associations between the CYP2J2 G-50T polymorphism and coronary artery disease risk in three genetic models (allele model: odds ratio (OR) = 1...
July 24, 2017: Oncotarget
https://www.readbyqxmd.com/read/28761062/t2diacod-a-gene-atlas-of-type-2-diabetes-mellitus-associated-complex-disorders
#14
Jyoti Rani, Inna Mittal, Atreyi Pramanik, Namita Singh, Namita Dube, Smriti Sharma, Bhanwar Lal Puniya, Muthukurussi Varieth Raghunandanan, Ahmed Mobeen, Srinivasan Ramachandran
We performed integrative analysis of genes associated with type 2 Diabetes Mellitus (T2DM) associated complications by automated text mining with manual curation and also gene expression analysis from Gene Expression Omnibus. They were analysed for pathogenic or protective role, trends, interaction with risk factors, Gene Ontology enrichment and tissue wise differential expression. The database T2DiACoD houses 650 genes, and 34 microRNAs associated with T2DM complications. Seven genes AGER, TNFRSF11B, CRK, PON1, ADIPOQ, CRP and NOS3 are associated with all 5 complications...
July 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28756208/activation-of-aldh1a1-in-mda-mb-468-breast-cancer-cells-that-over-express-cyp2j2-protects-against-paclitaxel-dependent-cell-death-mediated-by-reactive-oxygen-species
#15
Sarah E Allison, Yongjuan Chen, Nenad Petrovic, Jian Zhang, Kirsi Bourget, Peter I Mackenzie, Michael Murray
Cytochrome P450 2J2 (CYP2J2) expression is elevated in breast and other tumours, and is known to be protective against cytotoxic agents that may be used in cancer chemotherapy. This study evaluated the mechanisms by which MDA-MB-468 breast cancer cells that stably expressed CYP2J2 (MDA-2J2 cells) were protected against killing by the anti-cancer agent paclitaxel. Compared to control cells caspase-3/7 activation by paclitaxel was lower in MDA-2J2 cells, while cell proliferation and colony formation following paclitaxel treatment were increased...
November 1, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28698302/heme-modification-contributes-to-the-mechanism-based-inactivation-of-human-cytochrome-p450-2j2-by-two-terminal-acetylenic-compounds
#16
Hsia-Lien Lin, Haoming Zhang, Vyvyca J Walker, Jaime D'Agostino, Paul F Hollenberg
The mechanism-based inactivation of human CYP2J2 by three terminal acetylenic compounds: N-(methylsulfonyl)-6-(2-propargyloxyphenyl)hexanamide (MS), 17-octadecynoic acid (OD), and danazol (DZ) was investigated. The loss of hydroxyebastine (OHEB) carboxylation activity in a reconstituted system was time- and concentration-dependent and required NADPH for MS and OD, but not DZ. The kinetic constants for the mechanism-based inactivation of OHEB carboxylation activity were: KI of 6.1 μM and kinact of 0.22 min(-1) for MS and KI of 2...
September 2017: Drug Metabolism and Disposition: the Biological Fate of Chemicals
https://www.readbyqxmd.com/read/28687674/anti-inflammatory-%C3%AF-3-endocannabinoid-epoxides
#17
Daniel R McDougle, Josephine E Watson, Amr A Abdeen, Reheman Adili, Megan P Caputo, John E Krapf, Rodney W Johnson, Kristopher A Kilian, Michael Holinstat, Aditi Das
Clinical studies suggest that diets rich in ω-3 polyunsaturated fatty acids (PUFAs) provide beneficial anti-inflammatory effects, in part through their conversion to bioactive metabolites. Here we report on the endogenous production of a previously unknown class of ω-3 PUFA-derived lipid metabolites that originate from the crosstalk between endocannabinoid and cytochrome P450 (CYP) epoxygenase metabolic pathways. The ω-3 endocannabinoid epoxides are derived from docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) to form epoxyeicosatetraenoic acid-ethanolamide (EEQ-EA) and epoxydocosapentaenoic acid-ethanolamide (EDP-EA), respectively...
July 25, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28587983/ophiopogonin-d-and-eets-ameliorate-ang-ii-induced-inflammatory-responses-via-activating-ppar%C3%AE-in-huvecs
#18
Xiaoyan Huang, Yuguang Wang, Zhaoyan Zhang, Yuan Wang, Xiangmei Chen, Yi Wang, Yue Gao
CYP2J2 is highly expressed in cardiovascular tissue including the heart and vascular endothelial cells. CYP2J2 and the EETs have been shown owning diverse biological effects. Our previous study found that ophiopogonin D (OP-D) suppressed drug-induced endoplasmic reticulum (ER) stress by upregulating the levels of CYP2J3/EETs in cardiomyocytes. The aim of this research was to investigate whether CYP2J2/EETs-PPARα pathway involved in endothelium protective effects of OP-D in human umbilical vein endothelial cells (HUVECs)...
August 19, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28554983/cyp2j2-metabolites-epoxyeicosatrienoic-acids-attenuate-ang-ii-induced-cardiac-fibrotic-response-by-targeting-g%C3%AE-12-13
#19
Zuowen He, Yong Yang, Zheng Wen, Chen Chen, Xizhen Xu, Yanfang Zhu, Yan Wang, Dao Wen Wang
The arachidonic acid-cytochrome P450 2J2-epoxyeicosatrienoic acid (AA-CYP2J2-EET) metabolic pathway has been identified to be protective in the cardiovascular system. This study explored the effects of the AA-CYP2J2-EET metabolic pathway on cardiac fibrosis from the perspective of cardiac fibroblasts and underlying mechanisms. In in vivo studies, 8-week-old male CYP2J2 transgenic mice (aMHC-CYP2J2-Tr) and littermates were infused with angiotensin II (Ang II) or saline for 2 weeks. Results showed that CYP2J2 overexpression increased EET production...
July 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28488585/eets-reduces-lps-induced-hyperpermeability-by-targeting-grp78-mediated-src-activation-and-subsequent-rho-rock-signaling-pathway
#20
Ruolan Dong, Danli Hu, Yan Yang, Zhihui Chen, Menglu Fu, Dao Wen Wang, Xizhen Xu, Ling Tu
Integrity of endothelial barrier is a determinant of the prognosis in the acute lung injury caused by sepsis. The epoxyeicosatrienoic acids (EETs), metabolites of arachidonic acid, exhibit protective effects in various pathogenic states, however, whether EETs play a role in endothelial barrier enhancement and the involved mechanisms remain to be investigated. Here, we show that increased EETs level by endothelial specific cytochrome P450 epoxygenase 2J2 over-expression and soluble epoxide hydrolase (sEH) inhibitor TPPU reduced lipopolysaccharide-induced endothelial hyper-permeability in vivo, accompanied by improved survival of septic mice...
April 21, 2017: Oncotarget
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