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Cyclooxygenase

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https://www.readbyqxmd.com/read/29786649/kudzu-leaf-extract-suppresses-the-production-of-inducible-nitric-oxide-synthase-cyclooxygenase-2-tumor-necrosis-factor-alpha-and-interleukin-6-via-inhibition-of-jnk-tbk1-and-stat1-in-inflammatory-macrophages
#1
Seok Hyun Eom, So-Jung Jin, Hee-Yeong Jeong, Youngju Song, You Jin Lim, Jong-In Kim, Youn-Hyung Lee, Hee Kang
Kudzu ( Pueraria montana var. lobata (Willd.) Sanjappa & Pradeep) is a perennial leguminous vine, and its root and flower have been used for herbal medicine in Asia for a long time. Most dietary flavonoids are reported to be concentrated in its root, not in its aerial parts including leaves. In this study, we investigated whether kudzu leaf and its major constituent, robinin (kaempferol-3- O -robinoside-7- O -rhanmoside) possessed anti-inflammatory activity. To test this hypothesis, we used peritoneal macrophages isolated from BALB/c mice and stimulated the cells with lipopolysaccharide (LPS) or LPS plus interferon (IFN)-γ...
May 22, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29784076/analgesic-efficacy-and-hematologic-effects-of-robenacoxib-in-mice
#2
Jennifer A Beninson, Jennifer L Lofgren, Patrick A Lester, Madeline M Hileman, Daniel J Berkowitz, Daniel D Myers
NSAID analgesics may confound models that require inflammation to mimic disease development in humans. This effect presents a challenge for veterinary staff and investigators, because surgery is often necessary to create mouse models of disease and NSAID are first-line analgesics used to treat postoperative pain. We evaluated robenacoxib, a NSAID highly selective for cyclooxygenase 2, in a carrageenan paw edema (CPE) assay and surgical model of venous thrombosis (VT). We generated a mouse-specific dose-response curve by using the CPE assay for robenacoxib doses of 3...
May 1, 2018: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/29783120/canine-mesenchymal-stem-cells-treated-with-tnf-%C3%AE-and-ifn-%C3%AE-enhance-anti-inflammatory-effects-through-the-cox-2-pge-2-pathway
#3
Hye-Mi Yang, Woo-Jin Song, Qiang Li, Su-Yeon Kim, Hyeon-Jin Kim, Min-Ok Ryu, Jin-Ok Ahn, Hwa-Young Youn
Mesenchymal stem cells (MSCs) have been used in studies on treatment of various diseases, and their application to immune-mediated diseases has garnered interest. Various methods for enhancing the immunomodulation effect of human MSCs have been used; however, similar approaches for canine MSCs are relatively unexplored. Accordingly, we evaluated immunomodulatory effects and mechanisms in canine MSCs treated with TNF-α and IFN-γ. Lipopolysaccharide (LPS)-stimulated RAW 264.7 cells were incubated with the conditioned media (CM) from canine MSCs for 48 h...
May 14, 2018: Research in Veterinary Science
https://www.readbyqxmd.com/read/29782360/a-phase-ii-study-of-celecoxib-with-irinotecan-5-fluorouracil-and-leucovorin-in-patients-with-previously-untreated-advanced-or-metastatic-colorectal-cancer
#4
Emerson Y Chen, Charles D Blanke, Daniel G Haller, Al B Benson, Tomislav Dragovich, Heinz-Josef Lenz, Carlos Robles, Hong Li, Motomi Mori, Nora Mattek, Rachel E Sanborn, Charles D Lopez
OBJECTIVE: Colorectal cancer (CRC) is the second leading cause of cancer death in the United States. Cyclooxygenase-2 (COX-2) overexpression is associated with increased tumor invasiveness and proliferation in CRC, and COX-2 inhibition has demonstrated chemopreventive activity. This study investigated the addition of celecoxib, a selective COX-2 inhibitor, to the irinotecan, 5-fluorouracil, and leucovorin (IFL) regimen for patients with previously untreated metastatic CRC. PATIENTS AND METHODS: Forty-seven patients enrolled in this single-arm phase II study received celecoxib at 400 mg orally twice daily in combination with weekly irinotecan (125 mg/m), 5-fluorouracil (500 mg/m), and leucovorin (20 mg/m) for 4 weeks every 6 weeks...
May 18, 2018: American Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29781354/effects-and-possible-mechanisms-of-alpinia-officinarum-ethanol-extract-on-indomethacin-induced-gastric-injury-in-rats
#5
Jingwen Gong, Zhong Zhang, Xuguang Zhang, Feng Chen, Yinfeng Tan, Hailong Li, Jie Jiang, Junqing Zhang
CONTEXT: Alpinia officinarum Hance (Zingiberoside) has a long history in treating gastrointestinal diseases, but its mechanisms of action are not yet known. OBJECTIVE: To investigate the effects and underlying mechanisms of the ethanol extract of A. officinarum rhizomes in an indomethacin-induced gastric injury rat model. MATERIAL AND METHODS: Indomethacin (0.3 g/kg) was orally administered to Sprague-Dawley rats to induce gastric damage; after 7 h, the rats were treated with 0...
December 2018: Pharmaceutical Biology
https://www.readbyqxmd.com/read/29781036/correlation-between-hgf-c-met-and-notch1-signaling-pathways-in-human-gastric-cancer-cells
#6
Kuo-Hung Huang, I-Cheng Sung, Wen-Liang Fang, Chin-Wen Chi, Tien-Shun Yeh, Hsin-Chen Lee, Pen-Hui Yin, Anna Fen-Yau Li, Chew-Wun Wu, Yi-Ming Shyr, Muh-Hwa Yang
In recent decades, research concerning gastric carcinogenesis has rapidly progressed. It is evident that hepatocyte growth factor (HGF) is clinically related to gastric cancer progression and metastasis. In addition, previous studies have found that expression of Notch ligand Jagged1 is correlated with the poor prognosis of gastric cancer. However, the interaction between the HGF/c-Met and Notch1 signaling pathways remains unknown. In the present study, we found that gastric cancer patients with positive c-Met expression exhibited poorer overall survival than patients without c-Met expression (P=0...
May 16, 2018: Oncology Reports
https://www.readbyqxmd.com/read/29780561/triple-action-pt-iv-derivatives-of-cisplatin-a-new-class-of-potent-anticancer-agents-that-overcome-resistance
#7
Emanuele Petruzzella, Roman Sirota, Irene Solazzo, Valentina Gandin, Dan Gibson
A series of triple action Pt(iv) prodrugs was designed to test the hypothesis that multi-action compounds, where each bioactive moiety intervenes in several cellular processes, might be more effective than a single agent at killing cancer cells. In particular, "triple action" Pt(iv) derivatives of cisplatin, where the axial ligands are inhibitors of cyclooxygenase (COXi), histone deacetylase (HDACi) or pyruvate dehydrogenase kinase (PDKi) were developed. All compounds, ctc-[Pt(NH3 )2 (COXi)(PDKi)Cl2 ], ctc-[Pt(NH3 )2 (COXi)(HDACi)Cl2 ] and ctc-[Pt(NH3 )2 (HDACi)(PDKi)Cl2 ], where COXi = aspirin or ibuprofen, PDKi = dichloroacetate and HDACi = valproate or phenylbutyrate, were significantly more cytotoxic than cisplatin against all cell lines of an in-house panel of human cancer cells...
May 14, 2018: Chemical Science
https://www.readbyqxmd.com/read/29780000/the-effects-of-proton-pump-inhibitor-on-hepatic-vascular-responsiveness-and-hemodynamics-in-cirrhotic-rats
#8
I-Fang Hsin, Shao-Jung Hsu, Chiao-Lin Chuang, Teh-Ia Huo, Hui-Chun Huang, Fa-Yauh Lee, Hsin-Ling Ho, Shu-Yu Chang, Shou-Dong Lee
BACKGROUND: Liver cirrhosis is associated with increased intrahepatic resistance due to hepatic fibrosis and exaggerated vasoconstriction. Recent studies have indicated that proton pump inhibitors (PPIs), in addition to acid suppression, modulate vasoactive substances and vasoresponsiveness. PPIs are frequently prescribed in patients with cirrhosis due to a higher prevalence of peptic ulcers, however other impacts are unknown. METHODS: Liver cirrhosis was induced in Sprague-Dawley rats with common bile duct ligation (BDL)...
May 17, 2018: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/29777723/effect-of-acetylcholinesterase-inhibitors-donepezil-and-rivastigmine-on-the-activity-and-expression-of-cyclooxygenases-in-a-model-of-the-inflammatory-action-of-fluoride-on-macrophages-obtained-from-thp-1-monocytes
#9
Marta Goschorska, Irena Baranowska-Bosiacka, Izabela Gutowska, Maciej Tarnowski, Katarzyna Piotrowska, Emilia Metryka, Krzysztof Safranow, Dariusz Chlubek
Inflammation is an important factor in the development of many diseases of the central nervous system, including Alzheimer's disease and other types of dementia. ‪Given that acetylcholinesterase inhibitors are also currently believed to have anti-inflammatory properties, the purpose of this study was to investigate the effect of acetylcholinesterase inhibitors (rivastigmine, donepezil) on cyclooxygenase activity and expression using the proinflammatory action of fluoride (F- ) on cultured macrophages obtained from THP-1 monocytes...
May 16, 2018: Toxicology
https://www.readbyqxmd.com/read/29777058/gpr40-is-a-low-affinity-epoxyeicosatrienoic-acid-receptor-in-vascular-cells
#10
Sang Kyu Park, Anja Herrnreiter, Sandra L Pfister, Kathryn M Gauthier, Benjamin A Falck, John R Falck, William B Campbell
Endothelium-derived epoxyeicosatrienoic acids (EETs) have numerous vascular activities mediated by G protein--coupled receptors. Long-chain free fatty acids and EETs activate GPR40, prompting us to investigate the role of GPR40 in some vascular EET activities. 14,15-EET, 11,12-EET, arachidonic acid, and the GPR40 agonist GW9508 increase intracellular calcium concentrations in human GPR40-overexpressing HEK293 cells (EC50 = 0.58 ± 0.08 μM, 0.91 ± 0.08 μM, 3.9 ± 0.06 μM and 19 ± 0.37 nM, respectively)...
May 18, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29775722/inflammatory-and-oxidative-mechanisms-potentiate-bifenthrin-induced-neurological-alterations-and-anxiety-like-behavior-in-adult-rats
#11
Brahim Gargouri, Harsharan S Bhatia, Michèle Bouchard, Bernd L Fiebich, Hamadi Fetoui
Bifenthrin (BF) is a synthetic pyrethroid pesticide widely used in several countries to manage insect pests on diverse agricultural crops. Growing evidence indicates that BF exposure is associated with an increased risk of developing neurodegenerative disorders. However, the mechanisms by which BF induces neurological and anxiety alterations in the frontal cortex and striatum are not well known. The present in vivo study was carried out to determine whether reactive oxygen species (ROS)-mediated oxidative stress (OS) and neuroinflammation are involved in such alterations...
May 15, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29775616/amelioration-of-uvb-induced-oxidative-stress-and-inflammation-in-fat-1-transgenic-mouse-skin
#12
Hye-Won Yum, Seong Hoon Kim, Jing X Kang, Young-Joon Surh
ω-3 polyunsaturated fatty acids (PUFAs), which are abundant in some fish oils, are known to scavenge lipid peroxyl radicals and increase host immunoresponsiveness. As UVB-induced oxidative stress and inflammation have been implicated in apoptotic cell death, this study was designed to investigate the anti-inflammatory, anti-oxidative, and anti-apoptotic capacity of fat-1 transgenic mice capable of converting ω-6 to ω-3 PUFAs. Wild-type (WT) C57BL/6 mice and fat-1 mice were maintained on the AIN-93 diet supplemented with 10% safflower oil rich in ω-6 PUFAs for 5 weeks...
May 15, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29775228/uroprotective-mechanism-of-quercetin-against-cyclophosphamide-induced-urotoxicity-effect-on-oxidative-stress-and-inflammatory-markers
#13
Iman O Sherif
The urotoxicity is a common complication associated with patients receiving cyclophosphamide (CYP). This study was designed to investigate the uroprotective mechanism of quercetin (Quer) flavonoid against CYP induced urotoxicity via determination of oxidative stress markers as well as inflammatory mediators in bladder tissue. Forty male Wistar rats were divided into four groups; Normal group: received saline for 10 days. Quer control group: received quercetin 50 mg/kg/day for 10 days. CYP group: received saline for 10 days and injected with a single dose of 150 mg/kg CYP intraperitoneal (i...
May 18, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29773995/hypoxia-reoxygenation-of-rat-renal-arteries-impairs-vasorelaxation-via-modulation-of-endothelium-independent-sgc-cgmp-pkg-signaling
#14
Diana Braun, Christa Zollbrecht, Stefanie Dietze, Rudolf Schubert, Stefan Golz, Holger Summer, Pontus B Persson, Mattias Carlström, Marion Ludwig, Andreas Patzak
Ischemia/reperfusion injury holds a key position in many pathological conditions such as acute kidney injury and in the transition to chronic stages of renal damage. We hypothesized that besides a reported disproportional activation of vasoconstrictor response, hypoxia/reoxygenation (H/R) adversely affects endothelial dilatory systems and impairs relaxation in renal arteries. Rat renal interlobar arteries were studied under isometric conditions. Hypoxia was induced by application of 95% N2 , 5% CO2 for 60 min to the bath solution, followed by a 10 min period of reoxygenation (95% O2 , 5% CO2 )...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29773005/anti-inflammatory-potential-of-in-vitro-cultures-of-the-white-button-mushroom-agaricus-bisporus-agaricomycetes-in-caco-2-cells
#15
Bozena Muszynska, Agata Grzywacz, Katarzyna Kala, Joanna Gdula-Argasinska
Agaricus bisporus (white button mushroom) is one of the most popular culinary-medicinal mushrooms worldwide. This species has for decades been the subject of numerous scientific studies. The aim of this study was to examine the pro- or anti-inflammatory properties of A. bisporus and biomass extracts from in vitro cultures growing in Oddoux medium enriched with α-linolenic acid in colon epithelial Caco-2 cells activated with lipopolysaccharide (LPS) and tumor necrosis factor (TNF)-α. Incubation of Caco-2 cells with A...
2018: International Journal of Medicinal Mushrooms
https://www.readbyqxmd.com/read/29772372/palmitate-induces-nitric-oxide-production-and-inflammatory-cytokine-expression-in-zebrafish
#16
Seon-Heui Cha, Yongha Hwang, Kil-Nam Kim, Hee-Sook Jun
Inflammation markers in zebrafish embryos reflect a toxic response that is common to other animal models and humans. Free fatty acids (FFAs) are known to cause damage in various tissues by inducing inflammation. In this study, we investigated whether a FFA (palmitate) induces inflammation in zebrafish embryos. Nitrous oxide (NO) production and cyclooxygenase-2 (COX-2) mRNA expression were increased in palmitate-treated zebrafish embryos in a dose-dependent manner. mRNA expression of pro-inflammatory cytokines, interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF- α), were also increased...
May 14, 2018: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29771996/annexin-a6-regulates-catabolic-events-in-articular-chondrocytes-via-the-modulation-of-nf-%C3%AE%C2%BAb-and-wnt-%C3%A3-catenin-signaling
#17
Takeshi Minashima, Thorsten Kirsch
Annexin A6 (AnxA6) is expressed in articular chondrocytes at levels higher than in other mesenchymal cell types. However, the role of AnxA6 in articular chondrocytes is not known. Here we show that complete lack of AnxA6 functions resulted in increased ß-catenin activation in Wnt3a-treated murine articular chondrocytes, whereas AnxA6 expressing articular chondrocytes showed decreased ß-catenin activation. High expression of AnxA6 in human articular chondrocytes showed the highest inhibition of Wnt/ß-catenin signaling...
2018: PloS One
https://www.readbyqxmd.com/read/29771750/injectable-nonsteroidal-anti-inflammatory-drugs-in-sport
#18
Matthew J Matava
OBJECTIVE: The primary objective of this article is to review the basic science of nonsteroidal anti-inflammatory drugs (NSAIDs), their clinical effects, indications, potential complications, and ethical issues associated with the use of injectable NSAIDs in the treatment of athletes. These objectives are presented taking into consideration the contemporaneous issues associated with the treatment of amateur and professional athletes. DATA SOURCES: A nonformal review of the published medical literature and lay media focusing on the use of injectable NSAIDs in athletes was used for this article...
May 10, 2018: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/29771447/intermedin1-53-protects-cardiac-function-in-rats-with-septic-shock-via-inhibiting-oxidative-stress-and-cardiomyocyte-apoptosis
#19
Y-J Yu, A-H Su, H-B Yang, J-X Chen
OBJECTIVE: To investigate the protective effect of intermedin1-53 (IMD1-53) on cardiac function in rats with septic shock and its underlying mechanism. MATERIALS AND METHODS: Twenty-four male Sprague-Dawley (SD) rats were randomly assigned into three groups, namely the control group (NC group), septic shock group (ET group) and IMD1-53 treatment group (IMD group), with 8 rats in each group. Levels of hemodynamic indicators, blood glucose, lactate acid, CK-MB (creatine kinase-MB) and cTnI (cardiac troponin I) in rats were determined...
May 2018: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29771124/genistein-ameliorates-non-alcoholic-fatty-liver-disease-by-targeting-thromboxane-a2-pathway
#20
Wenzhe Wang, Junliang Chen, Jinyan Mao, Hongling Li, Mingfu Wang, Hao Zhang, Haitao Li, Wei Chen
Non-alcoholic fatty liver disease (NAFLD) is now a public health issue worldwide, but no drug has received approval yet. Genistein, an isoflavonoid derived from soybean, ameliorates high fat diet-induced NAFLD in mice, but the molecular underpinnings remain largely elusive. Arachidonic acid is a major ingredient of animal fats, and arachidonic acid cascade has been implicated in chronic inflammation. In this study, we investigated whether genistein against NAFLD by targeting arachidonic acid cascade. By using a mouse model, we showed that genistein supplementation improved high-fat diet induced NAFLD by normalizing hepatomegaly, liver steatosis, aminotransferase abnormalities and glucose tolerance...
May 17, 2018: Journal of Agricultural and Food Chemistry
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