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https://www.readbyqxmd.com/read/28432343/cox-1-pge2-ep4-alleviates-mucosal-injury-by-upregulating-%C3%AE-arr1-mediated-akt-signaling-in-colitis
#1
Xiaojie Peng, Jianzhong Li, Siwei Tan, Minyi Xu, Jin Tao, Jie Jiang, Huiling Liu, Bin Wu
COX-1/PGE2 is an important protective mediator in ulcerative colitis (UC). β-arrestin1 (β-arr1), which acts as a scaffold protein, is involved in PGE2-mediated signaling pathways. However, the interaction between PGE2 and β-arr1 in maintaining mucosal barrier integrity remains unexplored. In this study, we demonstrated that COX-1 and PGE2 were significantly decreased, and EP4 mRNA was downregulated in both UC patients and mice during the injury phase. PGE2 treatment was found to alleviate mucosal injury and induce EP4 expression during dextran sulfate sodium (DSS)-induced colitis in wild-type (WT) mice...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28430970/helicobacter-pylori-outer-membrane-vesicles-inhibit-human-t-cell-responses-via-induction-of-monocyte-cox-2-expression
#2
Barry D Hock, Judith L McKenzie, Jacqueline I Keenan
The modulation of T cell responses by Helicobacter pylori is thought to potentiate both H. pylori persistence and development of gastric pathologies including cancer. Release of outer membrane vesicles (OMV) by H. pylori provides a potential vehicle for modulation of the immune system. Although OMV are thought to have T cell suppressive activity this has not yet been demonstrated. Their suppressive activity was investigated in this study using the responses of peripheral blood mononuclear cells (PBMC) to T cell stimuli as a readout...
April 18, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/28430965/nrf2-regulates-the-inflammatory-response-including-heme-oxygenase-1-induction-by-mycoplasma-pneumoniae-lipid-associated-membrane-proteins-in-thp-1-cells
#3
Jihong Hu, Chunyan Chen, Guangli Ou, Xiaoxing You, Tianping Tan, Xinnian Hu, Yihua Zeng, Minjun Yu, Cuiming Zhu
A series of inflammatory responses caused by Mycoplasma pneumoniae largely depend on the lipid-associated membrane proteins (LAMPs). Nuclear factor E2-related factor 2 (Nrf2), a transcription factor, is considered to be a critical modulator of inflammatory responses and cellular redox homeostasis. Monocytes play an important role in the invasion and immunity to resist pathogens. Here, we investigated the role of Nrf2 in the anti-inflammatory response stimulated by LAMPs using the human monocyte cell line THP-1...
April 18, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/28430655/a-study-on-the-anti-tumor-mechanism-of-total-flavonoids-from-radix-tetrastigmae-against-additional-cell-line-based-on-cox-2-mediated-wnt-%C3%AE-catenin-signaling-pathway
#4
Li Qinglin, Xin Wenxiu, Zhong Like, Fangluo, Cao Gang, Huang Ping
This study is to explore the effect of total flavonoids from Radix Tetrastigmae (TF) against hepatic cancer and discuss the acting mechanism. Proliferation of HepG2 cells was promoted by PGE2 and Butaprost. Using AH6809 as the positive control, the inhibitory effect of TF on additional cell line was detected through a CCK-8 assay, the apoptosis rate was detected by flow cytometry, and the nuclear morphology of cells were observed by Hochest33258 staining. Then PCR was applied to determine the mRNA expression...
April 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/28425581/clinical-biochemical-and-genetic-features-of-41-han-chinese-families-with-primary-hypertrophic-osteoarthropathy-and-their-therapeutic-response-to-etoricoxib-results-from-a-6-months-prospective-clinical-intervention
#5
Shan-Shan Li, Jin-We He, Wen-Zhen Fu, Yu-Juan Liu, Yun-Qiu Hu, Zhen-Lin Zhang
Primary hypertrophic osteoarthropathy (PHO) is a rare inherited disease caused by genetic defects in prostaglandin metabolism pathway; disturbed prostaglandin E2 (PGE2 ) catabolism resulting in increased PGE2 levels is suggested in the pathogenesis. Forty-three Han Chinese patients with PHO were studied and 41 of them were treated. Mutations in HPGD gene, causing hypertrophic osteoarthropathy, primary, autosomal recessive 1 (PHOAR1; OMIM 259100), were identified in 7 patients, and mutations in SLCO2A1 gene, causing hypertrophic osteoarthropathy, primary, autosomal recessive 2 (PHOAR2; OMIM 614441), were identified in 36 patients...
April 20, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28424532/stemness-and-differentiation-potential-recovery-effects-of-sinapic-acid-against-ultraviolet-a-induced-damage-through-the-regulation-of-p38-mapk-and-nf-%C3%AE%C2%BAb
#6
Young Sun Hwang, See-Hyoung Park, Mingyeong Kang, Sae Woong Oh, Kwangseon Jung, Yong Seek Park, Jongsung Lee
Ultraviolet A (UVA) irradiation exerts negative effects on stemness and differentiation potential of stem cells. This study aimed to explore the effect of sinapic acid on UVA-irradiation-induced damages to stemness and differentiation potential of human-adipose-tissue-derived mesenchymal stem cells (hAMSCs) and its UVA-antagonist mechanisms. Sinapic acid attenuated UVA-induced reduction in the proliferative potential and stemness by upregulating OCT4, SOX2, and NANOG. In addition, sinapic acid significantly recovered UVA-induced reduction in expression level of hypoxia-inducible factor (HIF)-1α...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28424169/identification-of-the-fatty-acid-activation-site-on-human-clc-2
#7
John Cuppoletti, Kirti P Tewari, Jayati Chakrabarti, Danuta H Malinowska
Fatty acids (including lubiprostone and cobiprostone) are human ClC-2 (hClC-2) Cl(-) channel activators. Molecular and cellular mechanisms underlying this activation were examined. Role of a 4-amino acid PKA activation site, RGET691 of hClC-2 was investigated using WT and mutant (AGET, RGEA and AGAA) hClC-2 expressed in 293EBNA cells as well as involvement of PKA, [cAMP]i, EP2 or EP4 receptor agonist activity. All fatty acids (lubiprostone, cobiprostone, eicosatetraynoic acid (ETYA), oleic acid and elaidic acid) caused significant rightward shifts in concentration-dependent Cl(-) current activation (increasing EC50s) with mutant compared to WT hClC-2 channels, without changing time- and voltage-dependence, I-V rectification or methadone inhibition of the channel...
April 19, 2017: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/28423971/intrauterine-infection-immune-system-and-premature-birth
#8
Fernanda Rodrigues Helmo, Eduardo Arthur Rodovalho Alves, Renata Alves de Andrade Moreira, Viviane Oliveira Severino, Laura Penna Rocha, Maria Luíza Gonçalves Dos Reis Monteiro, Marlene Antônia Dos Reis, Renata Margarida Etchebehere, Juliana Reis Machado, Rosana Rosa Miranda Corrêa
Preterm birth accounts for nearly one million deaths among children under five years of age, and although its etiopathogenesis is not fully elucidated, ascending intrauterine infection and fetal inflammatory response seem to be the main triggers. The intense inflammatory response mediated by IL-1β, TNF-α, PAF, IFN-γ and IL-6, PGE2 and MMP-1 and MMP-9 causes fetal membrane damage and rupture, increased uterine contractions and biochemical and structural changes in the cervix. Furthermore, preterm neonates have deficient innate and adaptive immune responses characterized by reduced levels of IgG, opsonization and phagocytosis, as well as increased activation of Th1 cells in relation to Th2 cells...
April 20, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28423012/15-hydroxyprostaglandin-dehydrogenase-15-pgdh-prevents-lipopolysaccharide-lps-induced-acute-liver-injury
#9
Lu Yao, Weina Chen, Kyoungsub Song, Chang Han, Chandrashekhar R Gandhi, Kyu Lim, Tong Wu
The NAD+-dependent 15-hydroxyprostaglandin dehydrogenase (15-PGDH) catalyzes the oxidation of the 15(S)-hydroxyl group of prostaglandin E2 (PGE2), converting the pro-inflammatory PGE2 to the anti-inflammatory 15-keto-PGE2 (an endogenous ligand for peroxisome proliferator-activated receptor-gamma [PPAR-γ]). To evaluate the significance of 15-PGDH/15-keto-PGE2 cascade in liver inflammation and tissue injury, we generated transgenic mice with targeted expression of 15-PGDH in the liver (15-PGDH Tg) and the animals were subjected to lipopolysaccharide (LPS)/Galactosamine (GalN)-induced acute liver inflammation and injury...
2017: PloS One
https://www.readbyqxmd.com/read/28422751/twelve-year-survival-and-immune-correlates-in-dendritic-cell-vaccinated-melanoma-patients
#10
Stefanie Gross, Michael Erdmann, Ina Haendle, Steve Voland, Thomas Berger, Erwin Schultz, Erwin Strasser, Peter Dankerl, Rolf Janka, Stefan Schliep, Lucie Heinzerling, Karl Sotlar, Pierre Coulie, Gerold Schuler, Beatrice Schuler-Thurner
BACKGROUND: Reports on long-term (≥10 years) effects of cancer vaccines are missing. Therefore, in 2002, we initiated a phase I/II trial in cutaneous melanoma patients to further explore the immunogenicity of our DC vaccine and to establish its long-term toxicity and clinical benefit after a planned 10-year followup. METHODS: Monocyte-derived DCs matured by TNFα, IL-1β, IL-6, and PGE2 and then loaded with 4 HLA class I and 6 class II-restricted tumor peptides were injected intradermally in high doses over 2 years...
April 20, 2017: JCI Insight
https://www.readbyqxmd.com/read/28422402/gypenoside-inhibits-interleukin-1%C3%AE-induced-inflammatory-response-in-human-osteoarthritis-chondrocytes
#11
Zhi-Hong Wan, Qing Zhao
Gypenoside (GP), the main active ingredient of Gynostemma pentaphyllum, possesses a variety of pharmacological capacities including anti-inflammation, anti-oxidation, and anti-tumor. However, the effects of GP on IL-1β-stimulated human osteoarthritis (OA) chondrocytes are still unknown. Therefore, this study aimed to investigate the anti-inflammatory effects of GP on IL-1β-stimulated human OA chondrocytes and explore the possible mechanism. Our results showed that GP dose-dependently inhibited IL-1β-induced NO and PGE2 production in human OA chondrocytes...
April 19, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/28420991/gabapentin-attenuates-ocular-inflammation-in-vitro-and-in-vivo-studies
#12
Carmelina D Anfuso, Melania Olivieri, Annamaria Fidilio, Gabriella Lupo, Dario Rusciano, Salvatore Pezzino, Caterina Gagliano, Filippo Drago, Claudio Bucolo
To investigate the effects of gabapentin, a structural analog of γ-amino butyric acid (GABA), on the inflammatory response of lipopolysaccharide (LPS)-stimulated rabbit corneal cells (SIRC) and on endotoxin-induced uveitis (EIU) in rabbits. We investigated the LPS-induced expression of several inflammatory mediators, such as TNF-α, IL-1β, cPLA2, COX-2, and PGE2 in the SIRC cells with or without gabapentin treatment. Gabapentin treatment significantly (p < 0.05) attenuated cytokines production, cPLA2 activation, COX-2 expression, and PGE2 levels in SIRC...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28418604/loss-of-ink4a-arf-gene-enhances-ultraviolet-radiation-induced-cutaneous-tumor-development
#13
Israr Ahmad, Purushotham Guroji, Amanda H DeBrot, Padma P Manapragada, Santosh K Katiyar, Craig A Elmets, Nabiha Yusuf
The CDKN2A locus encodes for tumor suppressor genes p16(INK)(4a) and p14(Arf) which are frequently inactivated in human skin tumors. The purpose of this study was to determine the relationship between loss of INK4a/Arf activity and inflammation in the development of ultraviolet (UV) radiation-induced skin tumors. Panels of INK4a/Arf(-/-) mice and wild type (WT) mice were treated with a single dose of UVB (200 mJ/cm(2) ). For long-term studies, these mice were irradiated with UVB (200 mJ/cm(2) ) three times weekly for 30 weeks...
April 18, 2017: Experimental Dermatology
https://www.readbyqxmd.com/read/28415726/pge2-ep3-src-signaling-induces-egfr-nuclear-translocation-and-growth-through-egfr-ligands-release-in-lung-adenocarcinoma-cells
#14
Lorenzo Bazzani, Sandra Donnini, Federica Finetti, Gerhard Christofori, Marina Ziche
Prostaglandin E2 (PGE2) interacts with tyrosine kinases receptor signaling in both tumor and stromal cells supporting tumor progression. Here we demonstrate that in non-small cell lung carcinoma (NSCLC) cells, A549 and GLC82, PGE2 promotes nuclear translocation of epidermal growth factor receptor (nEGFR), affects gene expression and induces cell growth. Indeed, cyclin D1, COX-2, iNOS and c-Myc mRNA levels are upregulated following PGE2 treatment. The nuclear localization sequence (NLS) of EGFR as well as its tyrosine kinase activity are required for the effect of PGE2 on nEGFR and downstream signaling activities...
March 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28412475/potential-anti-inflammatory-effect-of-lqfm-021-in-carrageenan-induced-inflammation-the-role-of-nitric-oxide
#15
Iziara F Florentino, Daiany P B Silva, Dayane M Silva, Carina Sofia Cardoso, André L E Moreira, Clayton L Borges, Célia M de A Soares, Pablinny M Galdino, Luciano M Lião, Paulo C Ghedini, Ricardo Menegatti, Elson A Costa
The pyrazole compound LQFM-021 exhibits vasorelaxant, antinociceptive and anti-inflammatory activities. Furthermore, it has low toxicity, indicating that this compound may be considered to be a good prototype for the development of new analgesic/anti-inflammatory drugs. Therefore, the aim of this study was to investigate the potential anti-inflammatory activity of LQFM-021 using a model of carrageenan-induced inflammation as well as the mechanism of action and role of nitric oxide in this effect. Acute treatments with LQFM-021 (30 and 60 mg/kg p...
April 12, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28411132/methyl-jasmonate-attenuates-memory-dysfunction-and-decreases-brain-levels-of-biomarkers-of-neuroinflammation-induced-by-lipopolysaccharide-in-mice
#16
Umukoro Solomon, Eduviere Anthony Taghogho
Neuroinflammation plays a central role in the etiology and progression of Alzheimer's disease (AD), a neurodegenerative disorder, characterized by a gradual loss of memory functions. Thus, it has been proposed that agents that could reduce inflammatory processes in AD brains might be useful for the treatment of the disease. Methyl jasmonate (MJ) is a bioactive compound, which has been reported to exhibit anti-amnesic and in vitro anti-inflammatory activities. In this study, we further examine its effects on the brain levels of biomarkers of neuroinflammation in lipopolysaccharide (LPS)-induced memory deficits in mice...
April 11, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28410380/interleukin-10-and-prostaglandin-e2-have-complementary-but-distinct-suppressive-effects-on-toll-like-receptor-mediated-dendritic-cell-activation-in-ovarian-carcinoma
#17
Eva Brencicova, Ann L Jagger, Hayley G Evans, Mirella Georgouli, Alex Laios, Steve Attard Montalto, Gautam Mehra, Jo Spencer, Ahmed A Ahmed, Shanti Raju-Kankipati, Leonie S Taams, Sandra S Diebold
Dendritic cells (DC) have the potential to instigate a tumour-specific immune response, but their ability to prime naïve lymphocytes depends on their activation status. Thus, for tumour immunotherapy to be effective, the provision of appropriate DC activation stimuli such as Toll-like receptor (TLR) agonists is crucial in order to overcome immunosuppression associated with the tumour microenvironment. To address this, we investigated how ovarian carcinoma (OC)-associated ascites impedes activation of DC by TLR agonists...
2017: PloS One
https://www.readbyqxmd.com/read/28410218/6-shogaol-attenuates-lps-induced-inflammation-in-bv2-microglia-cells-by-activating-ppar-%C3%AE
#18
Qinghe Han, Qinghai Yuan, Xiaolin Meng, Junyuan Huo, Yuxin Bao, Guanghong Xie
6-Shogaol, a pungent agent isolated from Zingiber officinale Roscoe, has been known to have anti-tumor and anti-inflammatory effects. However, the anti-inflammatory effects and biological mechanism of 6-Shogaol in LPS-activated BV2 microglia remains largely unknown. In this study, we evaluated the anti-inflammatory effects of 6-Shogaol in LPS-activated BV2 microglia. 6-Shogaol was administrated 1 h before LPS treatment. The production of inflammatory mediators were detected by ELISA. The expression of NF-κB and PPAR-γ were detected by western blot analysis...
March 30, 2017: Oncotarget
https://www.readbyqxmd.com/read/28410217/pterostilbene-inhibits-inflammation-and-ros-production-in-chondrocytes-by-activating-nrf2-pathway
#19
En-Xing Xue, Jian-Ping Lin, Yu Zhang, Sun-Ren Sheng, Hai-Xiao Liu, Yu-Long Zhou, Hui Xu
Pterostilbene has been reported as a potential drug to inhibit oxidative stress and inflammation. However, the effect of pterostilbene on chondrocytes and osteoarthritis remains to be elucidated. We sought to investigate whether pterostilbene could protect chondrocytes from inflammation and ROS production through factor erythroid 2-related factor 2 (Nrf2) activation. The pterostilbene toxicity on chondrocytes collected from cartilages of Sprague-Dawley rats was assessed by CCK-8 test. Immunofluorescence and Western blotting explored the nuclear translocation of Nrf2...
March 30, 2017: Oncotarget
https://www.readbyqxmd.com/read/28409189/daphnetin-reduces-endotoxin-lethality-in-mice-and-decreases-lps-induced-inflammation-in-raw264-7-cells-via-suppressing-jak-stats-activation-and-ros-production
#20
Lei Shen, Ting Zhou, Jing Wang, Xiumei Sang, Lei Lan, Lan Luo, Zhimin Yin
OBJECTIVE: Here, we used various approaches to investigate the suppressive role of daphnetin in LPS-induced inflammatory response, with the goal to understand the underlining molecular mechanism by which daphnetin regulated these processes. METHODS: We examined the survival rate and the lung injury in the mice model of LPS-induced endotoxemia. The production of pro-inflammatory factors including tumor necrosis factor α (TNF-α), interleukin-1β (IL-1β), IL-6, nitric oxide (NO), and prostaglandin E2 (PGE2) was measured by ELISA and nitrite analysis, respectively...
April 13, 2017: Inflammation Research: Official Journal of the European Histamine Research Society ... [et Al.]
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