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https://www.readbyqxmd.com/read/28344957/predicting-factors-for-success-of-vaginal-delivery-in-preterm-induction-with-prostaglandin-e2
#1
Yoo Min Kim, Ju Young Park, Ji-Hee Sung, Suk-Joo Choi, Soo-Young Oh, Cheong-Rae Roh, Jong-Hwa Kim
OBJECTIVE: To evaluate the efficacy and safety of prostaglandin (PG) E2 for preterm labor induction and to investigate the predictive factors for the success of vaginal delivery. METHODS: A retrospective cohort study was performed in women (n=155) at 24+0 to 36+6 weeks of gestation who underwent induction of labor using a PGE2 vaginal pessary (10 mg, Propess) from January 2009 to December 2015. Success rates of vaginal delivery according to gestational age at induction and incidence of intrapartum complications such as tachysystole and nonreassuring fetal heart rate were investigated...
March 2017: Obstetrics & Gynecology Science
https://www.readbyqxmd.com/read/28344879/prostaglandin-e2-mediated-adenosinergic-effects-on-cd14-cells-self-amplifying-immunosuppression-in-cancer
#2
Saly Al-Taei, Josephine Salimu, Lisa K Spary, Aled Clayton, Jason F Lester, Zsuzsanna Tabi
CD39 and CD73 are surface-expressed ectonucleotidases that hydrolyze ATP in a highly regulated, serial manner into ADP, AMP and adenosine. The end product, adenosine, has both tumor-promoting and immunosuppressive effects. The aim of this study was to determine CD73 expression on immune cells in pleural effusion (PE) in order to have a better understanding of the immune environment in mesothelioma. PE- or blood-derived CD14(+) cells of mesothelioma patients and healthy donors were analyzed by flow cytometry for the expression of CD39 and CD73...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28344822/quantitative-analysis-of-lipids-a-higher-throughput-lc-ms-ms-based-method-and-its-comparison-to-elisa
#3
Adarsh S Gandhi, David Budac, Tanzilya Khayrullina, Roland Staal, Gamini Chandrasena
AIM: Lipids such as prostaglandins, leukotrienes and thromboxanes are released as a result of an inflammatory episode in pain (central and peripheral). METHODOLOGY & RESULTS: To measure these lipids as potential mechanistic biomarkers in neuropathic pain models, we developed a higher-throughput LC-MS/MS-based method with simultaneous detection of PGE2, PGD2, PGF2α, LTB4, TXB2 and 2-arachidonoyl glycerol in brain and spinal cord tissues. We also demonstrate that the LC-MS/MS method was more sensitive and specific in differentiating PGE2 levels in CNS tissues compared with ELISA...
March 2017: Future Science OA
https://www.readbyqxmd.com/read/28344194/an-administration-of-tak-683-at-a-minimally-effective-dose-for-luteinizing-hormone-stimulation-under-the-absence-of-the-ovary-induces-luteinizing-hormone-surge-in-ovary-intact-goats
#4
Nahoko Kanai, Natsumi Endo, Satoshi Ohkura, Yoshihiro Wakabayashi, Hisanori Matsui, Hirokazu Matsumoto, Kaori Ishikawa, Akira Tanaka, Tatsuya Watanabe, Hiroaki Okamura, Tomomi Tanaka
The present study aimed to evaluate hormonal responses and their association with the TAK-683 blood concentrations in goats administered TAK-683 at a low dose, which had been previously determined as the minimally effective dose for luteinizing hormone (LH) stimulation in ovariectomized goats. In Experiment 1, 5 µg of TAK-683 treatment had no significant stimulatory effect on LH secretion in ovariectomized Shiba goats (n = 4). In Experiment 2, cycling goats received the treatment of prostaglandin F2α and progesterone-releasing controlled internal drug releasing (CIDR) to induce the follicular phase, then they were treated with 5 µg of TAK-683 (hour 0) intravenously (n = 4, IV) or subcutaneously (n = 3, SC) or with vehicle intravenously (n = 4, control) at 12 h after CIDR removal...
March 24, 2017: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/28343378/adipose-derived-stem-cells-suppress-inflammation-induced-by-il-1beta-through-down-regulation-of-p2x7r-mediated-by-mir-373-in-chondrocytes-of-osteoarthritis
#5
Rilong Jin, Miaoda Shen, Liedao Yu, Xuanwei Wang, Xiangjin Lin
Adipose-derived stem cells (ADSCs) were previously considered to have an anti-inflammatory effect, and Interleukin-1beta (IL-1beta) was found to be a pro-inflammatory factor in chondrocytes, but the mechanism underlying ADSCs and IL-1beta is unclear. In this study, we investigate whether P2X7 receptor (P2X7R) signalling, regulated by microRNA 373 (miR-373), was involved in the ADSCs and IL-1beta mediated inflammation in osteoarthritis (OA). Chondrocytes were collected from 20OA patients and 20 control participants, and ADSCs were collected from patients who had undergone abdominal surgery...
March 27, 2017: Molecules and Cells
https://www.readbyqxmd.com/read/28342979/guggulsterone-sensitized-drug-resistant-human-hepatocarcinoma-cells-to-doxorubicin-through-a-cox-2-p-gp-dependent-pathway
#6
Hong-Bin Xu, Jun Fu, Fang Huang, Jing Yu
Previous researches indicated that cyclooxygenase-2 (Cox-2) might be involved in P-glycoprotein (P-gp)-mediated multidrug resistance in hepatocellular carcinoma cells. Doxorubicin-resistant hepatocellular carcinoma PLC/PRF/5 cells (PLC/PRF/5R) and HepG2 (HepG2R) cells were developed in the present study. The modulatory effect of guggulsterone on Cox-2 and P-gp in PLC/PRF/5R and HepG2R cells was investigated. Cells proliferation, Cox-2 and P-gp expression, and prostaglandin E2 release were examined using MTT, flow cytometry, western blot and ELISA assays...
March 23, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28342692/novel-pyrazolo-1-5-a-pyridines-as-orally-active-ep1-receptor-antagonists-synthesis-structure-activity-relationship-studies-and-biological-evaluation
#7
Kentaro Umei, Yosuke Nishigaya, Atsushi Kondo, Kazuya Tatani, Nobuyuki Tanaka, Yasushi Kohno, Shigeki Seto
Novel pyrazolo[1,5-a]pyridine derivatives were designed, synthesized and evaluated as orally active EP1 antagonists for the treatment of overactive bladder. Matched molecular pair analysis (MMPA) allowed the design of a new series of pyrazolo[1,5-a]pyridine derivatives 4-6. Structure-activity relationships (SAR) studies of 4-6 were performed, leading to identification of the nanomolar-level EP1 antagonist 4c, which exhibited good pharmacological effect through intraduodenal (id) administration in a 17-phenyltrinor prostaglandin E2-induced bladder contraction model in rats...
March 14, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28342204/the-ep4-antagonist-l-161-982-induces-apoptosis-cell-cycle-arrest-and-inhibits-prostaglandin-e2-induced-proliferation-in-oral-squamous-carcinoma-tca8113-cells
#8
Xiaohui Li, Bo Yang, Guoxu Han, Weizhong Li
BACKGROUND: Recent studies suggest that cyclooxygenase 2 (COX-2) inhibitors may enhance the toxic effects of anticancer drugs on tumor cells, including oral squamous cell carcinoma(OSCC), but its long-term use can cause side effects such as stomach ulcers and myocardial infarction. Our aim was to investigate proliferative effects of a downstream product of COX-2, prostaglandin E2(PGE2), in human oral squamous carcinoma cell line Tca8113 and explore the effects of PGE2 receptors, especially EP4 receptor, on the growth of Tca8113 cells...
March 25, 2017: Journal of Oral Pathology & Medicine
https://www.readbyqxmd.com/read/28341787/potential-new-treatment-for-non-freezing-cold-injury-is-iloprost-the-way-forward
#9
Anne-Marie Ionescu, Sarah Hutchinson, Mehtab Ahmad, Christopher Imray
INTRODUCTION: Non-freezing cold injury (NFCI) remains largely under-reported, and is of particular importance in the armed forces where its prevalence is greatest. Iloprost, a synthetic prostaglandin I2 analogue, has previously been used with some success in the treatment of vasospastic and freezing cold injuries, although its role in NFCI remains unclear. CASE REPORT: An Iloprost infusion was used to treat the long-term sequelae of an ex-soldier suffering with ongoing pedal pain and loss of function 20 years after the initial NFCI insult sustained on military exercise...
March 23, 2017: Journal of the Royal Army Medical Corps
https://www.readbyqxmd.com/read/28341741/endogenous-prostaglandin-e2-amplifies-il-33-production-by-macrophages-through-an-e-prostanoid-ep-2-ep4-cyclic-camp-epac-dependent-pathway
#10
Sachin K Samuchiwal, Barbara Balestrieri, Hannah Raff, Joshua A Boyce
When activated through toll-like receptors (TLRs), macrophages generate interleukin-33 (IL-33), an IL-1 family member that induces innate immune responses through ST2 signaling. Lipopolysaccharide (LPS), a TLR4 ligand, induces macrophages to generate prostaglandin E2 (PGE2) through inducible cyclooxygenase (COX)-2 and microsomal PGE2 synthase-1 (mPGES-1) (1). We demonstrate that IL-33 production by bone marrow derived murine macrophages (bmMFs) requires the generation of endogenous PGE2 and the intrinsic expression of EP2 receptors to amplify NF-κB-dependent LPS-induced IL-33 expression via Exchange Protein Activated by cAMP (EPAC)...
March 24, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28341703/niacin-ameliorates-ulcerative-colitis-via-prostaglandin-d2-mediated-d-prostanoid-receptor-1-activation
#11
Juanjuan Li, Deping Kong, Qi Wang, Wei Wu, Yanping Tang, Tingting Bai, Liang Guo, Lumin Wei, Qianqian Zhang, Yu Yu, Yuting Qian, Shengkai Zuo, Guizhu Liu, Qian Liu, Sheng Wu, Yi Zang, Qian Zhu, Daile Jia, Yuanyang Wang, Weiyan Yao, Yong Ji, Huiyong Yin, Masataka Nakamura, Michael Lazarus, Richard M Breyer, Lifu Wang, Ying Yu
Niacin, as an antidyslipidemic drug, elicits a strong flushing response by release of prostaglandin (PG) D2 However, whether niacin is beneficial for inflammatory bowel disease (IBD) remains unclear. Here, we observed niacin administration-enhanced PGD2 production in colon tissues in dextran sulfate sodium (DSS)-challenged mice, and protected mice against DSS or 2,4,6-trinitrobenzene sulfonic acid (TNBS)-induced colitis in D prostanoid receptor 1 (DP1)-dependent manner. Specific ablation of DP1 receptor in vascular endothelial cells, colonic epithelium, and myeloid cells augmented DSS/TNBS-induced colitis in mice through increasing vascular permeability, promoting apoptosis of epithelial cells, and stimulating pro-inflammatory cytokine secretion of macrophages, respectively...
March 24, 2017: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/28341178/mechanisms-underlying-sodium-nitroprusside-induced-tolerance-in-the-mouse-aorta-role-of-ros-and-cyclooxygenase-derived-prostanoids
#12
Mariana C Diniz, Vania C Olivon, Lívia D Tavares, Janaina A Simplicio, Natália A Gonzaga, Daniele G de Souza, Lusiane M Bendhack, Carlos R Tirapelli, Daniella Bonaventura
AIMS: To determine the role of reactive oxygen species (ROS) on sodium nitroprusside (SNP)-induced tolerance. Additionally, we evaluated the role of ROS on NF-κB activation and pro-inflammatory cytokines production during SNP-induced tolerance. MAIN METHODS: To induce in vitro tolerance, endothelium-intact or -denuded aortic rings isolated from male Balb-c mice were incubated for 15, 30, 45 or 60min with SNP (10nmol/L). KEY FINDINGS: Tolerance to SNP was observed after incubation of endothelium-denuded, but not endothelium-intact aortas for 60min with this inorganic nitrate...
March 21, 2017: Life Sciences
https://www.readbyqxmd.com/read/28339853/prosurvival-effect-of-cumulus-prostaglandin-g-h-synthase-2-prostaglandin2-signaling-on-bovine-blastocyst-impact-on-in-vivo-posthatching-development%C3%A2
#13
Fabienne Nuttinck, Alice Jouneau, Gilles Charpigny, Isabelle Hue, Christophe Richard, Pierre Adenot, Sylvie Ruffini, Ludivine Laffont, Martine Chebrout, Véronique Duranthon, Brigitte Marquant-Le Guienne
Apoptotic activity is a common physiological process which culminates at the blastocyst stage in the preimplantation embryo of many mammals. The degree of embryonic cell death can be influenced by the oocyte microenvironment. However, the prognostic significance of the incidence of apoptosis remains undefined. Prostaglandin E2 (PGE2) derived from prostaglandin G/H synthase-2 (PTGS2) activity is a well-known prosurvival factor that is mainly studied in oncology. PGE2 is the predominant PTGS2-derived prostaglandin present in the oocyte microenvironment during the periconceptional period...
March 7, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28339772/heterologous-desensitization-of-cardiac-%C3%AE-adrenergic-signal-via-hormone-induced-%C3%AE-ar-arrestin-pde4-complexes
#14
Qian Shi, Minghui Li, Delphine Mika, Qin Fu, Sungjin Kim, Jason Phan, Ao Shen, Gregoire Vandecasteele, Yang K Xiang
Aims: Cardiac β-adrenergic receptor (βAR) signaling is susceptible to heterologous desensitization by different neurohormonal stimuli in clinical conditions associated with heart failure. We aim to examine the underlying mechanism of cross talk between βARs and a set of G-protein coupled receptors (GPCRs) activated by hormones/agonists. Methods and results: Rat ventricular cardiomyocytes were used to determine heterologous phosphorylation of βARs under a series of GPCR agonists...
February 21, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28339567/role-of-biomechanical-forces-in-hyperfiltration-mediated-glomerular-injury-in-congenital-anomalies-of-the-kidney-and-urinary-tract
#15
Tarak Srivastava, Ganesh Thiagarajan, Uri S Alon, Ram Sharma, Ashraf El-Meanawy, Ellen T McCarthy, Virginia J Savin, Mukut Sharma
Congenital anomalies of the kidney and urinary tract (CAKUT) including solitary kidney constitute the main cause of progressive chronic kidney disease (CKD) in children. Children born with CAKUT develop signs of CKD only during adolescence and do not respond to renin-angiotensin-aldosterone system blockers. Early cellular changes underlying CKD progression to end-stage renal disease by early adulthood are not well understood. The mechanism of maladaptive hyperfiltration that occurs from loss of functional nephrons, including solitary kidney, is not clear...
January 17, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28339078/comparative-evaluation-of-the-effects-of-platelet%C3%A2-rich-plasma-formulations-on-extracellular-matrix-formation-and-the-nf%C3%A2-%C3%AE%C2%BAb-signaling-pathway-in-human-articular-chondrocytes
#16
Wenjing Yin, Haitao Xu, Jiagen Sheng, Zhengliang Xu, Xuetao Xie, Changqing Zhang
Concentrated leukocytes in leukocyte and platelet‑rich plasma (L‑PRP) may deliver increased levels of pro‑inflammatory cytokines to activate the nuclear factor (NF)‑κB signaling pathway, to counter or overwhelm the beneficial effects of growth factors on cartilage regeneration. However, to date, no relevant studies have substantiated this. In the present study, L‑PRP and pure platelet‑rich plasma (P‑PRP) were prepared, and leukocytes, platelets, pro‑inflammatory cytokines and growth factor concentrations were quantified; they were then used to treat human articular chondrocytes (HACs)...
March 23, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28339061/identification-of-two-novel-mutations-in-the-slco2a1-prostaglandin-transporter-gene-in-a-chinese-patient-with-primary-hypertrophic-osteoarthropathy
#17
Ting Guo, Kai Yang, Lv Liu, Zhi-Ping Tan, Hong Luo
Primary hypertrophic osteoarthropathy (PHO), which is a rare multi‑organic disease characterized by digital clubbing, pachydermia and periosteal reaction, typically begins during childhood or adolescence and progresses gradually over years prior to disease stabilization. To date, only two genes have been reported to be associated with PHO, 15‑hydroxyprostaglandin dehydrogenase and solute carrier organic anion transporter family, member 2A1 (SLCO2A1). However, the pathogenesis and the functions of the underlying genes remain to be fully elucidated...
March 24, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28337828/tradd-traf2-rip1-and-tak1-are-required-for-tnf-%C3%AE-induced-pro-labour-mediators-in-human-primary-myometrial-cells
#18
Ratana Lim, Gillian Barker, Martha Lappas
PROBLEM: TNF-α plays a central role in the processes of human labour and delivery. This study sought to determine the role of the adaptor proteins TNFR1-associated death domain protein (TRADD), TNF receptor-associated factor 2 (TRAF2), receptor interacting protein 1 (RIP1) and transforming growth factor beta-activated kinase 1 (TAK1) in TNF-α-induced formation of pro-labour mediators. METHOD OF STUDY: Human primary myometrial cells were transfected with siRNA against TRADD (siTRADD), TRAF2 (siTRAF2), RIP1 (siRIP1) or TAK1 (siTAK1), treated with TNF-α, and assayed for pro-inflammatory mediators expression...
March 24, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/28337827/prostaglandin-f2%C3%AE-induced-luteolysis-involves-activation-of-signal-transducer-and-activator-of-transcription-3-and-inhibition-of-akt-signaling-in-cattle
#19
Monique Tomazele Rovani, Gustavo Freitas Ilha, Bernardo Garziera Gasperin, Jandui Nóbrega, Dayananda Siddappa, Werner Glanzner, Alfredo Quites Antoniazzi, Vilceu Bordignon, Raj Duggavathi, Paulo Bayard Dias Gonçalves
Prostaglandin F2α (PGF) induces the precipitous loss of steroidogenic capabilities and cellular death in the corpus luteum of many species, yet the molecular mechanisms underlying this event are not completely understood. Signal transducer and activator of transcription 3 (STAT3) was activated in granulosa cells during follicle atresia, whereas AKT is immediately downregulated in the corpus luteum after PGF treatment in cattle; however, their involvement in both functional and morphological luteolysis in monovular species still need to be determined...
March 24, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/28336329/an-aromatic-amino-acid-within-intracellular-loop-2-of-the-prostaglandin-ep2-receptor-is-a-prerequisite-for-selective-association-and-activation-of-g%C3%AE-s
#20
Akiko Yano, Yuko Takahashi, Hiromi Moriguchi, Tomoaki Inazumi, Tomoaki Koga, Akira Otaka, Yukihiko Sugimoto
We previously demonstrated that the aromatic moiety of Tyr(143) within the intracellular loop 2 (ICL2) region of the prostaglandin EP2 receptor plays a crucial role in Gs coupling. Here we investigated whether the ICL2 of the EP2 receptor directly binds to Gαs and whether an aromatic moiety affects this interaction. In Chinese hamster ovary cells, mutations of Tyr(143) reduced the ability of the EP2 receptor to interact with G proteins as demonstrated by GTPγS sensitivity, as well as the ability of agonist-induced cAMP formation, with the rank order of Phe>Tyr (wild-type)=Trp>Leu>Ala (=0)...
March 21, 2017: Biochimica et Biophysica Acta
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