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https://www.readbyqxmd.com/read/28446755/relationship-between-ion-migration-and-interfacial-degradation-of-ch3nh3pbi3-perovskite-solar-cells-under-thermal-conditions
#1
Seongtak Kim, Soohyun Bae, Sang-Won Lee, Kyungjin Cho, Kyung Dong Lee, Hyunho Kim, Sungeun Park, Guhan Kwon, Seh-Won Ahn, Heon-Min Lee, Yoonmook Kang, Hae-Seok Lee, Donghwan Kim
Organic-inorganic hybrid perovskite solar cells (PSCs) have been extensively studied because of their outstanding performance: a power conversion efficiency exceeding 22% has been achieved. The most commonly used PSCs consist of CH3NH3PbI3 (MAPbI3) with a hole-selective contact, such as 2,2',7,7'-tetrakis(N,N-di-p-methoxyphenylamine)-9,9-spiro-bifluorene (spiro-OMeTAD), for collecting holes. From the perspective of long-term operation of solar cells, the cell performance and constituent layers (MAPbI3, spiro-OMeTAD, etc...
April 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28440284/cyp2j2-and-its-metabolites-eets-attenuate-insulin-resistance-via-regulating-macrophage-polarization-in-adipose-tissue
#2
Meiyan Dai, Lujin Wu, Peihua Wang, Zheng Wen, Xizhen Xu, Dao Wen Wang
Macrophages in adipose tissue are associated with obesity-induced low-grade inflammation, which contributed to insulin resistance and the related metabolic diseases. Previous studies demonstrated the beneficial effects of epoxyeicosatrienoic acids (EETs) on metabolic disorders and inflammation. Here we investigated the effects of CYP2J2-EETs-sEH metabolic pathway on insulin resistance in mice and the potential mechanisms. High fat diet (HFD)-induced obesity caused metabolic dysfunction with more weight gain, elevated glucose and lipids levels, impaired glucose tolerance and insulin sensitivity, while increase in EETs level by rAAV-mediated CYP2J2 overexpression, administration of sEH inhibit TUPS or EETs infusion significantly attenuated these metabolic disorders...
April 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28435929/megacolon-as-an-atypical-presentation-of-cervical-myelopathy
#3
Jacob Y L Oh, Kevin J H Kwek, Seh-Wee Tee, Mark Tan
A 61-year-old gentleman was admitted with progressive symptoms of cervical myelopathy. An MRI performed showed severe compression from C3-6 with cord signal changes. He was offered surgical intervention but the operation had to be delayed because of worsening abdominal distension. X-rays performed showed a severely dilated colon measuring >12 cm. A CT did not show any obstructive cause. He was managed conservatively for more than 2 weeks but did not improve. As his symptoms continued to worsen, a decision was made to proceed with a C3-6 posterior decompression and fusion, despite the theoretical risk of bacterial translocation predisposing him to infection...
March 2017: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/28434738/relationships-among-superantigen-toxin-gene-profiles-genotypes-and-pathogenic-characteristics-of-staphylococcus-aureus-isolates-from-bovine-mastitis
#4
Dong Wang, Limei Zhang, Changfu Yong, Mingliang Shen, Tariq Ali, Muhammad Shahid, Kun Han, Xuezhang Zhou, Bo Han
Staphylococcus aureus is one of the major etiological agents of bovine mastitis, harboring a wide variety of staphylococcal superantigen (SAg) toxin genes. The SAg toxin genes are reported to be closely associated with the pathogenicity of the Staph. aureus causing the bovine mastitis. This study was conducted to investigate SAg toxin gene profiles and to assess the relationships among SAg toxin genes, genotypes of Staph. aureus, and their pathogenic properties. A total of 327 quarter milk samples were collected from bovine mastitis cases for isolation and identification of pathogens...
April 20, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28428366/in-vitro-metabolism-of-oprozomib-an-oral-proteasome-inhibitor-role-of-epoxide-hydrolases-and-cytochrome-p450s
#5
Zhican Wang, Ying Fang, Juli Teague, Hansen Wong, Christophe Morisseau, Bruce D Hammock, Dan A Rock, Zhengping Wang
Oprozomib is an oral proteasome inhibitor currently under investigation in patients with hematologic malignancies or solid tumors. Oprozomib elicits potent pharmacological actions by forming a covalent bond with the active site N-terminal threonine of the 20S proteasome. Oprozomib has a short half-life across preclinical species and in patients due to systemic clearance via metabolism. Potential for drug-drug interactions (DDIs) could alter the exposure of this potent therapeutic therefore a thorough investigation of pathways responsible for metabolism is required...
April 20, 2017: Drug Metabolism and Disposition: the Biological Fate of Chemicals
https://www.readbyqxmd.com/read/28406677/no-impact-of-affective-person-knowledge-on-visual-awareness-evidence-from-binocular-rivalry-and-continuous-flash-suppression
#6
Timo Stein, Caitlyn Grubb, Maria Bertrand, Seh Min Suh, Sara C Verosky
Stimuli with intrinsic emotional value, like emotional faces, and stimuli associated with reward and punishment are often prioritized in visual awareness relative to neutral stimuli. Recently, Anderson, Siegel, Bliss-Moreau, and Barrett (2011) demonstrated that simply associating a face with affective knowledge can also influence visual awareness. Using a binocular rivalry task (BR), where a face was shown to one eye and a house to the other, they found that faces paired with negative versus neutral and positive behaviors dominated visual awareness...
April 13, 2017: Emotion
https://www.readbyqxmd.com/read/28403941/obesity-is-positively-associated-with-arachidonic-acid-derived-5-and-11-hydroxyeicosatetraenoic-acid-hete
#7
Charles Austin Pickens, Lorraine M Sordillo, Chen Zhang, Jenifer I Fenton
BACKGROUND: Oxylipids are oxygenated polyunsaturated fatty acid (PUFA) metabolites that are responsible for the onset and resolution of the inflammatory response. Enzymatic oxygenation through the lipoxygenase (LOX) or cytochrome P450 (CYP) pathways can form oxylipids that have either proinflammatory or proresolving functions depending on the type of PUFA substrate and degree of metabolism. The objective of this study was to determine how PUFA substrates and their corresponding oxylipids are associated with obesity...
May 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28402712/investigation-of-a-staphylococcal-food-poisoning-outbreak-from-a-chantilly-cream-dessert-in-umbria-italy
#8
Laura Ercoli, Silvia Gallina, Yacine Nia, Frédéric Auvray, Sara Primavilla, Fabrizia Guidi, Benedetta Pierucci, Catia Graziotti, Lucia Decastelli, Stefania Scuota
On August 28, 2015, a staphylococcal food poisoning outbreak occurred in Umbria, Italy, affecting 24 of the 42 customers who had dinner at a local restaurant. About 3 h after ingesting a variety of foods, the customers manifested gastrointestinal symptoms. Within 24 h of notification from the hospital emergency department, Sanitary Inspectors of the local Public Health Unit performed an epidemiological investigation. A retrospective cohort study was conducted among the customers. Food and environmental samples were collected...
April 12, 2017: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/28396419/cyclooxygenase-derived-proangiogenic-metabolites-of-epoxyeicosatrienoic-acids
#9
Amy A Rand, Bogdan Barnych, Christophe Morisseau, Tomas Cajka, Kin Sing Stephen Lee, Dipak Panigrahy, Bruce D Hammock
Arachidonic acid (ARA) is metabolized by cyclooxygenase (COX) and cytochrome P450 to produce proangiogenic metabolites. Specifically, epoxyeicosatrienoic acids (EETs) produced from the P450 pathway are angiogenic, inducing cancer tumor growth. A previous study showed that inhibiting soluble epoxide hydrolase (sEH) increased EET concentration and mildly promoted tumor growth. However, inhibiting both sEH and COX led to a dramatic decrease in tumor growth, suggesting that the contribution of EETs to angiogenesis and subsequent tumor growth may be attributed to downstream metabolites formed by COX...
April 10, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28384353/generation-and-characterization-of-epoxide-hydrolase-3-ephx3-deficient-mice
#10
Samantha L Hoopes, Artiom Gruzdev, Matthew L Edin, Joan P Graves, J Alyce Bradbury, Gordon P Flake, Fred B Lih, Laura M DeGraff, Darryl C Zeldin
Cytochrome P450 (CYP) epoxygenases metabolize arachidonic acid into epoxyeicosatrienoic acids (EETs), which play an important role in blood pressure regulation, protection against ischemia-reperfusion injury, angiogenesis, and inflammation. Epoxide hydrolases metabolize EETs to their corresponding diols (dihydroxyeicosatrienoic acids; DHETs) which are biologically less active. Microsomal epoxide hydrolase (EPHX1, mEH) and soluble epoxide hydrolase (EPHX2, sEH) were identified >30 years ago and are capable of hydrolyzing EETs to DHETs...
2017: PloS One
https://www.readbyqxmd.com/read/28356494/soluble-epoxide-hydrolase-pharmacological-inhibition-decreases-alveolar-bone-loss-by-modulating-host-inflammatory-response-rank-related-signaling-er-stress-and-apoptosis
#11
Carlos A Trindade da Silva, Ahmed Bettaieb, Marcelo H Napimoga, Kin Sing Stephen Lee, Bora Inceoglu, Carlos Ueira-Vieira, Donald Bruun, Sumanta K Goswami, Fawaz G Haj, Bruce D Hammock
Epoxyeicosatrienoic acids (EETs), metabolites of arachidonic acid derived from the cytochrome P450 (CYP450) enzymes, are mainly metabolized by soluble epoxide hydrolase (sEH) to their corresponding diols. EETs but not their diols, have anti-inflammatory properties and inhibition of sEH might provide protective effects against inflammatory bone loss. Thus, in the present study, we tested the selective sEH inhibitor, 1-trifluoromethoxyphenyl-3-(1-propionylpiperidin-4-yl) urea (TPPU) in a mouse model of periodontitis induced by infection with A...
March 29, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28332266/11-12-epoxyeicosatrienoic-acid-induces-vasodilator-response-in-the-rat-perfused-mesenteric-vasculature
#12
S M Bihzad, M H M Yousif
Epoxyeicosatrienoic acids (EETs) are endogenous ligands that undergo hydrolysis by soluble epoxide hydrolase (sEH). The responses of 11, 12-EET in comparison with other vasodilator agonists including carbachol and sodium nitroprusside (SNP) were investigated. The effect of 1-cyclohexyl-3-dodecyl urea (CDU), a sEH, was tested on the vasodilator effect induced by 11, 12-EET in the perfused mesenteric beds isolated from normo-glycaemic and type-1 STZ-diabetic rats. In the perfused mesenteric beds of control and diabetic animals, 11, 12-EET produced vasodilation in a dose-dependent manner...
January 2017: Autonomic & Autacoid Pharmacology
https://www.readbyqxmd.com/read/28296232/inhibitors-of-soluble-epoxide-hydrolase-minimize-ischemia-reperfusion-induced-cardiac-damage-in-normal-hypertensive-and-diabetic-rats
#13
Oliul Islam, Prashanth Patil, Sumanta K Goswami, Rema Razdan, Mohammed N Inamdar, Mohammed Rizwan, Jubin Mathew, Bora Inceoglu, Kin S Stephen Lee, Sung H Hwang, Bruce D Hammock
AIM: We designed a study to evaluate the cardioprotective effect of two soluble epoxide hydrolase (sEH) inhibitors, 1-(1-propanoylpiperidin-4-yl)-3-(4-trifluoromethoxy)phenyl)urea (TPPU) and trans-4-{4-[3-(4-trifluoromethoxyphenyl)-ureido]cyclohexyloxy}benzoic acid (t-TUCB), in ischemia-reperfusion (IR) model. METHODS: Cardioprotective effects of the sEH inhibitors were evaluated against IR-induced myocardial damage in hearts from normal, hypertensive and diabetic rats using Langendorff's apparatus...
March 15, 2017: Cardiovascular Therapeutics
https://www.readbyqxmd.com/read/28293507/soluble-epoxide-hydrolase-inhibition-and-epoxyeicosatrienoic-acid-treatment-improve-vascularization-of-engineered-skin-substitutes
#14
Dorothy M Supp, Jennifer M Hahn, Kevin L McFarland, Kelly A Combs, Kin Sing Stephen Lee, Bora Inceoglu, Debin Wan, Steven T Boyce, Bruce D Hammock
BACKGROUND: Autologous engineered skin substitutes comprised of keratinocytes, fibroblasts, and biopolymers can serve as an adjunctive treatment for excised burns. However, engineered skin lacks a vascular plexus at the time of grafting, leading to slower vascularization and reduced rates of engraftment compared with autograft. Hypothetically, vascularization of engineered skin grafts can be improved by treatment with proangiogenic agents at the time of grafting. Epoxyeicosatrienoic acids (EETs) are cytochrome P450 metabolites of arachidonic acid that are inactivated by soluble epoxide hydrolase (sEH)...
December 2016: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28281333/discovering-drugs-with-dna-encoded-library-technology-from-concept-to-clinic-with-an-inhibitor-of-soluble-epoxide-hydrolase
#15
Svetlana Belyanskaya, Yun Ding, James Callahan, Aili Lazaar, David Israel
DNA encoded chemical library technology was developed with the vision of becoming a transformational platform for drug discovery. The hope was that a new screening paradigm for low molecular weight drugs would be enabled by combining the vast molecular diversity achievable with combinatorial chemistry, the information encoding attributes of DNA, the power of molecular biology and a streamlined selection-based discovery process. We describe the discovery and early clinical development of GSK2256294, an inhibitor of the enzyme soluble epoxide hydrolase (sEH, EPHX2) using Encoded Library Technology (ELT)...
March 9, 2017: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/28279529/soluble-epoxide-hydrolase-inhibitors-of-indolinone-alkaloids-and-phenolic-derivatives-from-cimicifuga-dahurica-turcz-maxim
#16
Nguyen Phuong Thao, Bui Thi Thuy Luyen, Ji Sun Lee, Jang Hoon Kim, Young Ho Kim
The aim of this study was to search for potential therapeutic agents by identifying novel inhibitors of soluble epoxide hydrolase (sEH) from natural plants using an in silico approach. We found that an ethanolic extract from the roots of Cimicifuga dahurica (Turcz.) Maxim. significantly inhibited sEH in vitro. In a phytochemical investigation using assay-guided fractionation of the dichloromethane extract of C. dahurica, we isolated two new indolinone alkaloids (5 and 6) and five related constituents (1-4, and 7) and established their structures based on an extensive analysis using 1D and 2D NMR, and MS methods...
February 9, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28267313/facile-route-to-rare-heterobimetallic-aluminum-copper-and-aluminum-zinc-selenide-clusters
#17
Bin Li, Jiancheng Li, Rui Liu, Hongping Zhu, Herbert W Roesky
Heterobimetallic aluminum-copper and aluminum-zinc clusters were prepared from the reaction of LAl(SeH)2 [1; L = HC(CMeNAr)2 and Ar = 2,6-iPr2C6H3] with (MesCu)4 and ZnEt2, respectively. The resulting clusters with the core structures of Al2Se4Cu4 and Al2Se4Zn3 exhibit unique metal-organic frameworks. This is a novel pathway for the synthesis of aluminum-copper and aluminum-zinc selenides. The products have been characterized by spectroscopic methods and single-crystal X-ray structural characterization.
March 7, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28259677/soluble-epoxide-hydrolase-inhibition-alleviates-neuropathy-in-akita-ins2-akita-mice
#18
Karen Wagner, Jennifer Gilda, Jun Yang, Debin Wan, Christophe Morisseau, Aldrin V Gomes, Bruce D Hammock
The soluble epoxide hydrolase (sEH) is a regulatory enzyme responsible for the metabolism of bioactive lipid epoxides of both omega-6 and omega-3 long chain polyunsaturated fatty acids. These natural epoxides mediate cell signaling in several physiological functions including blocking inflammation, high blood pressure and both inflammatory and neuropathic pain. Inhibition of the sEH maintains the level of endogenous bioactive epoxy-fatty acids (EpFA) and allows them to exert their generally beneficial effects...
May 30, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28259037/altered-soluble-epoxide-hydrolase-derived-oxylipins-in-patients-with-seasonal-major-depression-an-exploratory-study
#19
Marie Hennebelle, Yurika Otoki, Jun Yang, Bruce D Hammock, Anthony J Levitt, Ameer Y Taha, Walter Swardfager
Many cytochrome p450-derived lipids promote resolution of inflammation, in contrast to their soluble epoxide hydrolase(sEH)-derived oxylipin breakdown products. Here we compare plasma oxylipins and precursor fatty acids between seasons in participants with major depressive disorder with seasonal pattern (MDD-s). Euthymic participants with a history of MDD-s recruited in summer-fall were followed-up in winter. At both visits, a structured clinical interview (DSM-5 criteria) and the Beck Depression Inventory II (BDI-II) were administered...
February 27, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28255523/inhibition-of-soluble-epoxide-hydrolase-as-a-novel-approach-to-high-dose-diazepam-induced-hypotension
#20
Arzu Ulu, Bora Inceoglu, Jun Yang, Vikrant Singh, Stephen Vito, Heike Wulff, Bruce D Hammock
CONTEXT: Hypotension is one of the dose limiting side effects of benzodiazepines (BZDs), in particular of diazepam (DZP) which is still widely used in the clinic. Currently, only one FDA approved antidote exists for BZD overdose and novel approaches are needed to improve management of DZP overdose, dependency and withdrawal. OBJECTIVE: Here, we hypothesized that increasing bioactive lipid mediators termed epoxy fatty acids (EpFAs) will prevent hypotension, as was shown previously in a murine model of LPS-induced hypotension...
June 2016: Journal of Clinical Toxicology
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