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Cyclooxygenase

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https://www.readbyqxmd.com/read/28231611/leg-vascular-and-skeletal-muscle-mitochondrial-adaptations-to-aerobic-high-intensity-exercise-training-are-enhanced-in-the-early-postmenopausal-phase
#1
Michael Nyberg, Jon Egelund, Camilla M Mandrup, Caroline B Andersen, Karen M B E Hansen, Ida-Marie F Hergel, Nicholai Valbak-Andersen, Ruth Frikke-Schmidt, Bente Stallknecht, Jens Bangsbo, Ylva Hellsten
Exercise training leads to favourable adaptations within skeletal muscle; however, this effect of exercise training may be blunted in postmenopausal women due to the loss of oestrogens. Furthermore, postmenopausal women may have an impaired vascular response to acute exercise. We examined the haemodynamic response to acute exercise in matched pre- and postmenopausal women before and after 12 weeks of aerobic high intensity exercise training. Twenty premenopausal and 16 early postmenopausal (3.1 ± 0.5 [mean ± SEM] years after final menstrual period) women only separated by 4 (50 ± 0 versus 54 ± 1) years of age were included...
February 23, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28230039/cyclooxygenase-2-expression-and-association-with-skin-cancer-a-meta-analysis-based-on-chinese-patients
#2
Lu Shujiao, Han Lilin, Shi Yong
OBJECTIVE: The purpose of this meta-analysis was to evaluate the association between cyclooxygenase-2 (Cox-2) expression and skin cancer. MATERIALS AND METHODS: We searched the databases of PubMed, CNKI, and WANFANG to find the case-control studies associated with Cox-2 expression and skin cancer. The association between Cox-2 expression and skin cancer was demonstrated by odds ratio (OR) and its 95% confidence interval (95% CI). The publication bias was evaluated by funnel plot and Egger's line regression test...
December 2016: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/28228357/activation-of-mtor-i%C3%AE%C2%BAb-%C3%AE-nf-%C3%AE%C2%BAb-pathway-contributes-to-lps-induced-hypotension-and-inflammation-in-rats
#3
Meryem Temiz-Resitoglu, Sefika Pinar Kucukkavruk, Demet Sinem Guden, Pelin Cecen, Ayse Nihal Sari, Bahar Tunctan, Aysegul Gorur, Lulufer Tamer-Gumus, Cuneyt Kemal Buharalioglu, Kafait U Malik, Seyhan Sahan-Firat
Mammalian target of rapamycin (mTOR), a serine/threonine kinase plays an important role in various pathophysiological processes including cancer, metabolic diseases, and inflammation. Although mTOR participates in Toll-like receptor 4 signalling in different cell types, the role of this enzyme in sepsis pathogenesis and its effects on hypotension and inflammation in endotoxemic rats remains unclear. In this study we investigated the effects of mTOR inhibition on lipopolysaccharide (LPS)-induced changes on expressions and/or activities of ribosomal protein S6 (rpS6), an mTOR substrate, nuclear factor-κB (NF-κB) p65, inhibitor κB (IκB)-α, inducible nitric oxide synthase (iNOS), cyclooxygenase (COX)-2 with production of nitric oxide, peroxynitrite, prostacyclin, and tumor necrosis factor (TNF)-α and activity of myeloperoxidase (MPO), which results in hypotension and inflammation...
February 19, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28228088/aryl-heteroaryl-substituted-celecoxib-derivatives-as-cox-2-inhibitors-synthesis-anti-inflammatory-activity-and-molecular-docking-studies
#4
Golla Madhava, Katla Venkata Ramana, Saddala Madhu Sudhana, Devineni Subba Rao, Kuntrapakam Hema Kumar, Valluru Lokanatha, Asupatri Usha Rani, Chamarthi Naga Raju
BACKGROUND: Cyclooxygenase (COX-2) inhibitors have been developed to provide better anti-inflammatory and analgesic efficacy than those of traditional NSAIDs. Several compounds having selective COX-2 inhibitors such as SC-558, Celecoxib, Rofecoxib, Valdecoxib and Etoricoxib are marketed as new generation NSAIDs and block the production of prostaglandins (PGs) in inflammatory cells. New anti-inflammatory dynamic agents with improved potency and safety profile are still needed. OBJECTIVE: As a part of our continuation research work towards the synthesis of anti-inflammatory agents, the synthesis of N-substituted aryl/heteroaryl-pyrazole-1yl benzene sulfonamide (Celecoxib) derivatives, and evaluated their anti-inflammatory activity in both methods in vitro and in vivo, and molecular docking study on COX-2 enzyme will be discussed in this study...
February 20, 2017: Medicinal Chemistry
https://www.readbyqxmd.com/read/28228071/a-rat-model-of-ischemic-enteritis-pathogenic-importance-of-enterobacteria-inos-no-and-cox-2-pge2
#5
Koji Takeuchi, Yoshino Komatsu, Yuka Nakamori, Tohru Kotani
BACKGROUND: We introduced a rat model of ischemic enteritis and investigated the roles of enterobacteria, nitric oxide (NO), and prostaglandins (PGs) in its pathogenesis. METHODS: Male rats were used after 18 h of fasting. Ischemic enteritis was induced by partial ligation of the superior mesenteric artery (SMA). Under ether anesthesia, SMA was isolated, and a stenosis was made by placing a needle (23 guage) on the vessel and ligating both the vessel and needle, and then a needle was removed from the ligature...
February 20, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28223925/effects-of-intermittent-alcohol-exposure-on-emotion-and-cognition-a-potential-role-for-the-endogenous-cannabinoid-system-and-neuroinflammation
#6
Laura Sanchez-Marin, Francisco J Pavon, Juan Decara, Juan Suarez, Ana Gavito, Estela Castilla-Ortega, Fernando Rodriguez de Fonseca, Antonia Serrano
Intermittent alcohol exposure is a common pattern of adolescent alcohol use that can lead to binge drinking episodes. Alcohol use is known to modulate the endocannabinoid system (ECS), which is involved in neuronal communication, neuroplasticity, neuroinflammation and behavior. Adolescent male Wistar rats were exposed to 4-week intermittent alcohol intoxication (3 g/kg injections for 4 days/week) or saline (N = 12 per group). After alcohol deprivation, adult rats were assessed for emotionality and cognition and the gene expression of the ECS and other factors related to behavior and neuroinflammation was examined in the brain...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28223863/design-synthesis-molecular-modeling-and-biological-evaluation-of-novel-diaryl-heterocyclic-analogs-as-potential-selective-cyclooxygenase-2-cox-2-inhibitors
#7
Deema A Al-Turki, Mohamed A Al-Omar, Laila A Abou-Zeid, Ihsan A Shehata, Mohammed S Al-Awady
New series of 3,4-diaryl-2-thioxoimidazolidin-4-ones and 3-alkylthio-4,5-diaryl-4H-1,2,4-triazoles were designed, synthesized and evaluated for their activity as anti-inflammatory agents. Compounds 20, 21, 23 and 34 are highly selective inhibitors of COX-2 enzyme at a concentration of 100 mM relative to celecoxib, the standard reference. (±)-3-(4-Phenoxy-phenyl)-5-phenyl-2-thioxoimidazolidin-4-ones 23 exhibited the most active anti-inflammatory agent.
January 2017: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
https://www.readbyqxmd.com/read/28223539/thymol-mitigates-lipopolysaccharide-induced-endometritis-by-regulating-the-tlr4-and-ros-mediated-nf-%C3%AE%C2%BAb-signaling-pathways
#8
Haichong Wu, Kangfeng Jiang, Nannan Yin, Xiaofei Ma, Gan Zhao, Changwei Qiu, Ganzhen Deng
The purpose of this study was to investigate the effects of thymol on lipopolysaccharide (LPS)-induced inflammatory responses and to clarify the potential mechanism of these effects. LPS-induced mouse endometritis was used to confirm the anti-inflammatory action of thymol in vivo. RAW264.7 cells were used to examine the molecular mechanism and targets of thymol in vitro. In vivo, thymol markedly alleviated LPS-induced pathological injury, myeloperoxidase (MPO) activity, and the production of tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) in mice...
February 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28223053/diabetes-upregulation-of-cyclooxygenase-2%C3%A2-contributes-to-altered-coronary-reactivity-after-cardiac-surgery
#9
Jun Feng, Kelsey Anderson, Arun K Singh, Afshin Ehsan, Hunter Mitchell, Yuhong Liu, Frank W Sellke
BACKGROUND: We hypothesized that upregulation of inducible cyclooxygenase 2 (COX-2) contributes to altered coronary arteriolar reactivity early after cardioplegic arrest and cardiopulmonary bypass (CP/CPB) in patients with diabetes mellitus who are undergoing cardiac surgery. METHODS: The right atrial tissue samples of nondiabetes (ND), controlled diabetes (CDM), and uncontrolled diabetes (UDM) patients undergoing cardiac surgery were harvested before and after CP/CPB...
February 18, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28222855/direct-growth-inhibitory-effects-of-prostaglandin-e2-in%C3%A2-pancreatic-cancer-cells-in%C3%A2-vitro-through-an-ep4-pka-mediated-mechanism
#10
Andrea Schmidt, James Sinnett-Smith, Steven Young, Hui-Hua Chang, O Joe Hines, David W Dawson, Enrique Rozengurt, Guido Eibl
BACKGROUND: There is strong evidence linking inflammation and the development of pancreatic ductal adenocarcinoma. Cyclooxygenase-2 (COX-2) and COX-2-derived PGE2 are overexpressed in human and murine pancreatic ductal adenocarcinoma. Several studies have demonstrated an important role of COX-2-derived PGE2 in tumor-stroma interactions; however, the direct growth effects of prostaglandin E2 (PGE2) on pancreatic ductal adenocarcinoma cells is less well defined. Our aim was to investigate the effects of PGE2 on pancreatic ductal adenocarcinoma cell growth and to characterize the underlying mechanisms...
February 17, 2017: Surgery
https://www.readbyqxmd.com/read/28222365/the-cessation-of-the-long-term-exposure-to-low-doses-of-mercury-ameliorates-the-increase-in-systolic-blood-pressure-and-vascular-damage-in-rats
#11
Danize Aparecida Rizzetti, João Guilherme Dini Torres, Alyne Goulart Escobar, Taiz Martins da Silva, Paola Zambelli Moraes, Raquel Hernanz, Franck Maciel Peçanha, Marta Miguel Castro, Dalton Valentim Vassallo, Mercedes Salaices, Maria Jesús Alonso, Giulia Alessandra Wiggers
This study aimed to verify whether a prolonged exposure to low-level mercury promotes haemodynamic disorders and studied the reversibility of this vascular damage. Rats were divided into seven groups: three control groups received saline solution (im) for 30, 60 or 90 days; two groups received HgCl2 (im, first dose, 4.6μg/kg, subsequent doses 0.07μg/kg/day) for 30 or 60 days; two groups received HgCl2 for 30 or 60 days (im, same doses) followed by a 30-day washout period. Systolic blood pressure (SBP) was measured, along with analysis of vascular response to acetylcholine (ACh) and phenylephrine (Phe) in the absence and presence of endothelium, a nitric oxide (NO) synthase inhibitor, an NADPH oxidase inhibitor, superoxide dismutase, a non-selective cyclooxygenase (COX) inhibitor and an AT1 receptor blocker...
February 18, 2017: Environmental Research
https://www.readbyqxmd.com/read/28220271/anandamide-oxidative-metabolism-induced-endoplasmic-reticulum-stress-and-apoptosis
#12
M Almada, B M Fonseca, C Amaral, M Diniz-da-Costa, G Correia-da-Silva, N Teixeira
The Endocannabinoid System (ECS) has been recognized as a crucial player in human reproduction. Changes in the levels of anandamide (AEA), the main endocannabinoid (eCB), negatively affect reproductive events, such as implantation, decidualization and placentation. Cyclooxygenase-2 (COX-2) is a major enzyme expressed in the endometrium and its involvement in female reproductive system has evolved over the last few years. Currently, COX-2 oxidative metabolism is emerging as a key mediator of AEA-induced actions...
February 20, 2017: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/28219698/protective-effects-of-diallyl-disulfide-against-acetaminophen-induced-nephrotoxicity-a-possible-role-of-cyp2e1-and-nf-%C3%AE%C2%BAb
#13
Je-Won Ko, Jin-Young Shin, Jeong-Won Kim, Sung-Hyeuk Park, Na-Rae Shin, In-Chul Lee, In-Sik Shin, Changjong Moon, Sung-Ho Kim, Sung-Hwan Kim, Jong-Choon Kim
Diallyl disulfide (DADS) is a degradation product of allicin which is contained in garlic. This study investigated the protective effects of DADS against acetaminophen (AAP)-induced nephrotoxicity and the molecular mechanisms of nephroprotective effects in rats. AAP caused severe nephrotoxicity as evidenced by significant increases in renal tubular cell apoptosis, mitochondria-mediated apoptosis, and up-regulation of nuclear transcription factor kappa-B (NF-κB), cyclooxygenase-2 (Cox-2), and tumor necrosis factor-α (TNF-α) in the kidney with histopathological alterations...
February 17, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28219355/vaccaria-hypaphorine-alleviates-lipopolysaccharide-induced-inflammation-via-inactivation-of-nf%C3%AE%C2%BAb-and-erk-pathways-in-raw-264-7-cells
#14
Haijian Sun, Weiwei Cai, Xu Wang, Yanling Liu, Bao Hou, Xuexue Zhu, Liying Qiu
BACKGROUND: Activation of macrophage is involved in many inflammation diseases. Lipopolysaccharide (LPS) is a powerful inflammatory signal contributing to monocytes/macrophages activation associated with increased proinflammatory cytokines expressions. We recently identified that vaccarin was expected to protect endothelial cells from injury. Hypaphorine was abundantly found in vaccaria semen. However, the potential roles and underlying mechanisms of vaccaria hypaphorine on macrophage inflammation have been poorly defined...
February 20, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28218042/doxorubicin-has-a-synergistic-cytotoxicity-with-cucurbitacin-b-in-anaplastic-thyroid-carcinoma-cells
#15
Si Hyoung Kim, Jun Goo Kang, Chul Sik Kim, Sung-Hee Ihm, Moon Gi Choi, Hyung Joon Yoo, Seong Jin Lee
In this study, the combined effect of doxorubicin with cucurbitacin B on survival of anaplastic thyroid carcinoma cells was evaluated. For experiments, 8505C and CAL62 human anaplastic thyroid carcinoma cells were used. Cell viability, the percentage of viable cells, and cytotoxic activity were measured using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay, multiplexed cytotoxicity assay, and cytotoxicity assay, respectively. Reactive oxygen species production was measured. In experiments, doxorubicin and cucurbitacin B reduced cell viability in a dose- and time-dependent manner...
February 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28217972/clinical-outcome-of-partial-cystectomy-for-transitional-cell-carcinoma-of-the-canine-bladder
#16
S J Marvel, B Séguin, D D Dailey, D H Thamm
Canine transitional cell carcinoma (TCC) of the bladder has historically been treated with a combination of chemotherapy, cyclooxygenase inhibitors and radiation therapy. While surgery has been used to treat TCC of the bladder, its efficacy has yet to be established. Thirty-seven client owned dogs that underwent partial cystectomy +/- various nonsurgical treatments for TCC were retrospectively evaluated. The overall median progression-free interval (PFI) was 235 days and the median survival time (ST) was 348 days...
February 20, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28217098/quercetin-inhibits-lps-induced-inflammation-and-ox-ldl-induced-lipid-deposition
#17
Feng Xue, Xiaobo Nie, Jianping Shi, Qingxue Liu, Ziwei Wang, Xiting Li, Jinqiu Zhou, Jia Su, Mingming Xue, Wei-Dong Chen, Yan-Dong Wang
Aberrant activation of inflammation and excess accumulation of lipids play crucial role in the occurrence and progression of atherosclerosis (AS). Quercetin (QCT) has been tested effectively to cure AS. It is widely distributed in plant foods and has been proved to have potential antioxidative and anticancer activities. However, the underlying molecular mechanisms of OCT in AS are not completely understood. In the present study, we stimulated murine RAW264.7 cells with lipopolysaccharide (LPS) or oxidized low-density lipoproteins (ox-LDL) to mimic the development of AS...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28216875/antidermatophytic-and-protease-inhibiting-activities-of-zerumbone-a-natural-sesquiterpene-from-the-rhizome-of-zingiber-zerumbet-l-roscoe-ex-j-e-smith
#18
Madhavankutty Jyothilakshmi, Mathew Jyothis, Gokulanathan Nair Hari Narayanan, Mukalel Sankunni Latha
CONTEXT: Due to increase in the number of patients with impaired immunity, incidence of dermatophytoses has increased considerably. Antidermatophytic agents with anti-inflammatory and protease-inhibiting activities will help in restricting inflammatory response associated with dermatophytoses. AIMS: The present study aims to evaluate antidermatophytic and protease-inhibiting activities of zerumbone. Cytotoxicity was tested using Chang liver cell line as a preliminary step in toxicity study...
January 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28216638/thymoquinone-an-irak1-inhibitor-with-in-vivo-and-in-vitro-anti-inflammatory-activities
#19
Muhammad Jahangir Hossen, Woo Seok Yang, Daewon Kim, Adithan Aravinthan, Jong-Hoon Kim, Jae Youl Cho
Thymoquinone (TQ) is a bioactive component of black seed (Nigella sativa) volatile oil and has been shown to have anti-oxidative, anti-inflammatory, and anti-cancer properties. In the present study, we explored the molecular mechanisms that underlie the anti-inflammatory effect of TQ and its target proteins using lipopolysaccharide (LPS)-stimulated murine macrophage-like RAW264.7 and human monocyte-like U937 cells, together with LPS/D-galactosamine (GalN)-induced acute hepatitis and HCl/EtOH-induced gastritis mouse models...
February 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28215165/synthesis-characterization-and-comparison-of-local-analgesic-anti-inflammatory-ulcerogenic-activity-of-copper-and-zinc-complexes-of-indomethacin
#20
Abhijit Sukul, Saikat Kumar Poddar, Sanjana Haque, Sajal Kumar Saha, Sreedam Chandra Das, Zobaer Al Mahmud, S M AbdurRahman, Abhijit Sukul
BACKGROUND: Non-steroidal anti-inflammatory drugs (NSAID) exert gastrointestinal upset by inhibiting mucosal cyclooxygenase (COX) activity for which complexation technique with metals has been adopted to overcome this drawback. OBJECTIVE: The study aimed to overcome the gastrointestinal side effects associated with indomethacin treatment by synthesizing copper (Cu) and zinc (Zn) complexes of indomethacin along with assessing potential pharmacological effects of these complexes...
February 16, 2017: Anti-inflammatory & Anti-allergy Agents in Medicinal Chemistry
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