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https://www.readbyqxmd.com/read/29141189/role-of-cyclooxygenase-inhibitors-in-diminution-of-dissimilar-stress-induced-depressive-behaviour-and-memory-impairment-in-rats
#1
Tahira Perveen, Shaista Emad, Saida Haider, Sana Sadaf, Sara Qadeer, Zehra Batool, Yousra Sarfaraz, Sheeza Sheikh
Memory functions can be considerably affected by various life events and stress has shown to be a chief regulator. Different stress patterns have distinct effects on the overall functioning of the brain. Stress provokes inflammation not only in the periphery but also in the brain. Neuroinflammation causes alterations in neuronal structure and function, which eventually progress to the development of neurodegenerative diseases. Inflammatory reactions are modulated through communication between the nervous, endocrine and immune systems...
November 12, 2017: Neuroscience
https://www.readbyqxmd.com/read/29140431/microvascular-adaptations-to-exercise-protective-effect-of-pgc-1-alpha
#2
Andrew O Kadlec, Chad Barnes, Matthew J Durand, David D Gutterman
BACKGROUND: Sedentary behavior and obesity are major risk factors for cardiovascular disease. Regular physical activity has independent protective effects on the cardiovascular system, but the mechanisms responsible remain elusive. Recent studies suggest that the protein peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α) participates in the response to exercise training. We hypothesized that the arterioles of athletes maintain dilation to flow despite combined inhibition of multiple vasodilators, but loss of PGC-1α renders these vessels susceptible to inhibition of a single vasodilator pathway...
November 11, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/29138519/time-to-delivery-and-delivery-outcomes-comparing-three-methods-of-labor-induction-in-7551-nulliparous-women-a-population-based-cohort-study
#3
C Lindblad Wollmann, M Ahlberg, G Petersson, S Saltvedt, O Stephansson
OBJECTIVE: Determine time-to-delivery and mode-of-delivery in labor induction among women with unripe cervix. STUDY DESIGN: 7551 nulliparous women with singleton deliveries, ⩾37 weeks, Bishop Score ⩽6, induced with dinoprostone, misoprostol or transcervical single balloon catheter. Linear regression analysis was used to estimate mean time-to-delivery with β-estimates and 95% confidence intervals with adjustments. Multivariable logistic regression analysis was used to calculate odds of cesarean delivery, instrumental vaginal delivery, maternal and neonatal outcomes...
November 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/29138268/n-acyl-amino-acids-elmiric-acids-endogenous-signaling-molecules-with-therapeutic-potential
#4
Sumner Burstein
The subject of N-acyl amino acid conjugates has been rapidly growing in recent years, especially with regard to their analgesic and anti-inflammatory actions. The field is comprised of a large family of lipid signaling molecules whose importance is only now being fully realized. The most widely studied member is N-arachidonoyl glycine (NAGly), which differs structurally from the endocannabinoid anandamide (N-arachidonoyl ethanolamide) by a single oxygen atom and the two are metabolically related. Topics that are covered in this mini review are: biosynthetic pathways for N-acyl amino acids, receptors for N-acyl amino acids, physiological actions of N-acyl amino acids, pharmacological effects of N-acyl amino acids and molecular mechanisms believed to be responsible for their effects...
November 14, 2017: Molecular Pharmacology
https://www.readbyqxmd.com/read/29137258/aberrantly-activated-cox-2-and-wnt-signaling-interact-to-maintain-cancer-stem-cells-in-glioblastoma
#5
Megan Wu, Jennifer Guan, Chris Li, Simon Gunter, Labeeba Nusrat, Sheena Ng, Karan Dhand, Cindi Morshead, Albert Kim, Sunit Das
Glioblastoma recurrence after aggressive therapy typically occurs within six months, and patients inevitably succumb to their disease. Tumor recurrence is driven by a subpopulation of cancer stem cells in glioblastoma (glioblastoma stem-like cells, GSCs), which exhibit resistance to cytotoxic therapies, compared to their non-stem-cell counterparts. Here, we show that the Cox-2 and Wnt signaling pathways are aberrantly activated in GSCs and interact to maintain the cancer stem cell identity. Cox-2 stimulates GSC self-renewal and proliferation through prostaglandin E2 (PGE2), which in turn activates the Wnt signaling pathway...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29136953/antidiarrheal-effects-of-water-soluble-proteins-from-plumeria-pudica-latex-in-mice
#6
Lucas de Araújo Bastos Santana, Diego Passos Aragão, Thiago de Souza Lopes Araújo, Nayara Alves de Sousa, Luan Kelves Miranda de Souza, Lucas Eduardo Silva Oliveira, Anna Carolina Toledo da Cunha Pereira, Gustavo Portela Ferreira, Naylla Veras de Moraes Oliveira, Bruna da Silva Souza, Francisca Beatriz Melo Sousa, Márcio Viana Ramos, Cleverson Diniz Teixeira de Freitas, Jand-Venes Rolim Medeiros, Jefferson Soares de Oliveira
The water-soluble protein fraction obtained from Plumeria pudica (LPPp) latex has previously been demonstrated to have anti-inflammatory and antinociceptive effects. In the present study, LPPp was tested for activity against diarrhea induced by castor oil, prostaglandin E2 (PGE2) or cholera toxin. Different doses of LPPp (10, 20 or 40mg/kg) significantly inhibited the percentage of diarrheal stools (31.18%, 42.97% and 59.70%, respectively) induced by castor oil. This event was followed by significant reduction of both intestinal fluid accumulation (31...
November 10, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29136266/prostanoids-and-hair-follicles-implications-for-therapy-of-hair-disorders
#7
Xue-Gang Xu, Hong-Duo Chen
Prostanoids, including prostaglandins (PGs) and thromboxane A2 (TXA2), are a family of lipid-derived autacoids that modulate many physiological systems and pathological contexts. Prostanoids are generated by sequential metabolism of arachidonic acid, catalysed by cyclo-oxygenase, to PGH2, which is then converted to PGD2, PGE2, PGF2α, PGI2 and TXA2, catalysed by their specific synthases. Recent evidence suggests that prostanoids play a role in regulating hair growth. The PGF2α analogue is Food and Drug Administration-approved and routinely used to enhance the growth of human eyelashes...
November 14, 2017: Acta Dermato-venereologica
https://www.readbyqxmd.com/read/29134301/prostaglandin-e2-receptor-ep1-in-healthy-and-diseased-human-endometrium
#8
Junyan Zhu, Doris Mayr, Christina Kuhn, Sven Mahner, Udo Jeschke, Viktoria von Schönfeldt
Prostaglandin E2 (PGE2) is well described to be associated with both endometrial functions and disorders. The primary aim of this study was to explore the underlying mechanisms that affect the growth and function of endometrial epithelium and stroma by assessing the staining intensity of PGE2 receptors (EP) in healthy endometrium across the menstrual cycle and in pathological endometrium, such as ovarian endometriosis and endometrial cancer. We retrospectively analyzed the EPs staining intensity in human nonpregnant endometrium throughout the menstrual cycle by immunohistochemistry and further focused on EP1 (n = 42)...
November 13, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/29133307/the-anti-inflammatory-effect-of-personalized-omega-3-fatty-acid-dosing-for-reducing-prostaglandin-e2-in-the-colonic-mucosa-is-attenuated-in-obesity
#9
Zora Djuric, D Kim Turgeon, Ananda Sen, Jianwei Ren, Kirk Herman, Devon Ramaswamy, Lili Zhao, Mack T Ruffin, Daniel P Normolle, William L Smith, Dean E Brenner
This clinical trial developed a personalized dosing model for reducing prostaglandin E2 (PGE2) in colonic mucosa using ω-3 fatty acid supplementation. The model utilized serum eicosapentaenoic acid (EPA, ω-3):arachidonic acid (AA, ω-6) ratios as biomarkers of colonic mucosal PGE2 concentration. Normal human volunteers were given low and high ω-3 fatty acid test doses for 2 weeks. This established a slope and intercept of the line for dose versus serum EPA:AA ratio in each individual. The slope and intercept was utilized to calculate a personalized target dose that was given for 12 weeks...
November 13, 2017: Cancer Prevention Research
https://www.readbyqxmd.com/read/29133219/dietary-fatty-acid-modification-for-the-treatment-of-aspirin-exacerbated-respiratory-disease-a-prospective-pilot-trial
#10
Thomas R Schneider, Christina B Johns, Marina L Palumbo, Katherine C Murphy, Katherine N Cahill, Tanya M Laidlaw
BACKGROUND: The high levels of eicosanoid production and the clinical efficacy of leukotriene-modifying pharmacotherapies for patients with aspirin-exacerbated respiratory disease (AERD) suggest that other interventions targeting arachidonic acid dysregulation may also improve disease control. OBJECTIVE: To assess the utility of a high omega-3/low omega-6 diet for the treatment of AERD. METHODS: Prospective, nonblinded dietary intervention in 10 adult patients with AERD at Brigham and Women's Hospital in Boston, MA...
November 10, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/29133212/quantitative-and-systems-pharmacology-2-in-silico-polypharmacology-of-g-protein-coupled-receptor-ligands-via-network-based-approaches
#11
Zengrui Wu, Weiqiang Lu, Weiwei Yu, Tianduanyi Wang, Weihua Li, Guixia Liu, Hankun Zhang, Xiufeng Pang, Jin Huang, Mingyao Liu, Feixiong Cheng, Yun Tang
G protein-coupled receptors (GPCRs) are the largest super family with more than 800 membrane receptors. Currently, over 30% of the approved drugs target human GPCRs. However, only approximately 30 human GPCRs have been resolved three-dimensional crystal structures, which limits traditional structure-based drug discovery. Recent advances in network-based systems pharmacology approaches have demonstrated powerful strategies for identifying new targets of GPCR ligands. In this study, we proposed a network-based systems pharmacology framework for comprehensive identification of new drug-target interactions on GPCRs...
November 10, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/29132911/antioxidant-anti-inflammatory-and-gastroprotective-activity-of-filipendula-ulmaria-l-maxim-and-filipendula-vulgaris-moench
#12
Stevan Samardžić, Jelena Arsenijević, Dragana Božić, Marina Milenković, Vele Tešević, Zoran Maksimović
ETHNOPHARMACOLOGICAL RELEVANCE: Meadowsweet (Filipendula ulmaria (L.) Maxim.) and dropwort (Filipendula vulgaris Moench) are herbaceous perennials employed in folk medicine for their antirheumatic, antipyretic and anti-ulcer properties. AIM OF THE STUDY: To assess ethnomedicinal claims through investigation of antioxidant, anti-inflammatory and gastroprotective effects of F. ulmaria and F. vulgaris lyophilized flower infusions (LFIs) as well as the F. vulgaris isolated flavonoids spiraeoside, kaempferol 4'-O-glucoside, astragalin 2''-O-gallate, mixture of hyperoside 2''-O-gallate and isoquercitrin 2''-O-gallate, and a tannin tellimagrandin II...
November 10, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29132875/aspirin-use-and-endometrial-cancer-risk-and-survival
#13
REVIEW
Tsuyoshi Takiuchi, Erin A Blake, Koji Matsuo, Anil K Sood, Theodore M Brasky
The role of acetylsalicylic acid (aspirin) as a chemo-preventive and adjuvant therapeutic agent for cancers is generating attention. Mounting evidence indicates that aspirin reduces the incidence and mortality of certain obesity-related cancers, particularly colorectal cancer. In endometrial cancer, previous studies examining the effect of aspirin remain inconsistent as to the reduction in the risk of endometrial cancer. While some evidence indicates protective effects in obese women, other studies have showed a potential deleterious effect of these medications on endometrial cancer outcomes...
November 10, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/29132299/chronic-administration-of-parecoxib-exerts-anxiolytic-like-and-memory-enhancing-effects-and-modulates-synaptophysin-expression-in-mice
#14
Bo Wang, Xin Jin, Xin Kuang, Shaowen Tian
BACKGROUND: Previous studies have shown that cyclooxygenase-2, a key enzyme that converts arachidonic acid to prostaglandins, is involved in anxiety and cognitive processes, but few studies have investigated the effects of chronic administration of cyclooxygenase-2 inhibitors on anxiety, learning and memory under normal physiological conditions. The aim of the study was to investigate the effects of chronic administration of parecoxib, a cyclooxygenase-2 inhibitor, on anxiety behavior and memory performance under normal physiological conditions and to explore the possible neural mechanism underlying parecoxib-mediated effects...
November 13, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/29132038/hemodynamics-of-the-corpus-luteum-in-mares-during-experimentally-impaired-luteogenesis-and-partial-luteolysis
#15
J C Ferreira, L F Novaes Filho, Y L Boakari, H S Canesin, D L Thompson, F S Lima, C Meira
The aim of the current project was to characterize the luteal vascularity and the plasma concentrations of progesterone (P4), prolactin (PRL) and 13,14-dihydro-15-keto-PGF2α (PGFM) in mares with luteal disturbances during early and mid-diestrus. In Experiment 1, twenty-one mares were treated with 2 mL of 0.9% NaCl, or 1 mg Dinoprost, or 10 mg Dinoprost on day two after ovulation (Control-D2, 1/10PGF-D2 and PGF-D2 groups, respectively; n = 7 mares/group). In Experiment 2, similar treatments were performed eight days post-ovulation using a different cohort of 21 mares (Control-D8, 1/10PGF-D8 and PGF-D8 groups, respectively; n = 7 mares/group)...
November 4, 2017: Theriogenology
https://www.readbyqxmd.com/read/29132037/flunixin-meglumine-improves-pregnancy-rate-in-embryo-recipient-beef-cows-with-an-excitable-temperament
#16
R K Kasimanickam, J B Hall, C T Estill, J P Kastelic, C Joseph, R L Abdel Aziz, D Nak
Objectives were to determine effects of: 1) handling temperament and administration of flunixin meglumine, an inhibitor of prostaglandin F2a (PGF2a) synthesis, given at the time of embryo transfer, on pregnancy rates in beef cattle embryo transfer recipients; 2) handling temperament and flunixin meglumine on peripheral concentrations of progesterone, cortisol, substance-P, prostaglandin F metabolites (PGFM, (13,14-dihydro-15-keto-PGF2a) and isoprostane 8-epi PGF2a; and 3) flunixin meglumine treatment on proportion of non-pregnant recipient cows returning to estrus within an expected interval...
November 10, 2017: Theriogenology
https://www.readbyqxmd.com/read/29129850/prostaglandin-terminal-synthases-as-novel-therapeutic-targets
#17
Shuntaro Hara
Non-steroidal anti-inflammatory drugs (NSAIDs) exert their anti-inflammatory and anti-tumor effects by reducing prostaglandin (PG) production via the inhibition of cyclooxygenase (COX). However, the gastrointestinal, renal and cardiovascular side effects associated with the pharmacological inhibition of the COX enzymes have focused renewed attention onto other potential targets for NSAIDs. PGH2, a COX metabolite, is converted to each PG species by species-specific PG terminal synthases. Because of their potential for more selective modulation of PG production, PG terminal synthases are now being investigated as a novel target for NSAIDs...
2017: Proceedings of the Japan Academy. Series B, Physical and Biological Sciences
https://www.readbyqxmd.com/read/29129801/activating-prostaglandin-e2-receptor-subtype-ep4-increases-secreted-mucin-from-airway-goblet-cells
#18
Tomohiro Akaba, Kosaku Komiya, Isao Suzaki, Yuji Kozaki, Jun Tamaoki, Bruce K Rubin
Prostaglandin E2 (PGE2) is a ligand of the E-type prostanoid receptors, EP1-4. PGE2 secretion is increased in the airways of patients with asthma by secretory phospholipases A2, which also increases MUC5AC mucin in goblet cells. We hypothesized that PGE2 would also increase MUC5AC mRNA and secreted protein through specific EP receptor activation. We sought to assess the effect of specific EP receptor activation on MUC5AC secretion from ciliated-enriched cells or goblet-enriched cells induced by IL-13. We develop an enriched goblet cell epithelium by growing normal human bronchial epithelial cells at air liquid interface for 14 days in the presence of IL-13...
November 9, 2017: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29129796/comprehensive-profiling-of-prostaglandins-in-human-ovarian-follicular-fluid-using-mass-spectrometry
#19
Bruce Pier, Johnathan W Edmonds, Landon Wilson, Alireza Arabshahi, Ray Moore, G Wright Bates, Jeevan K Prasain, Michael A Miller
Prostaglandins are formed by enzymatic and non-enzymatic mechanisms. They have been detected in human ovarian follicular fluid (HFF), a medium rich in growth factors and nutrients important for oocyte growth and fertility. However, the comprehensive identification of HFF prostaglandins has not been addressed. Here we use hybrid triple quadrupole time-of-flight and triple quadrupole mass spectrometers to comprehensively analyze prostaglandins in HFF. We identified PGE1, PGE2, PGF2α, and other prostaglandins synthesized via prostaglandin-endoperoxide synthase (i...
November 9, 2017: Prostaglandins & Other Lipid Mediators
https://www.readbyqxmd.com/read/29129634/immunostimulatory-effects-of-sulfated-chitosans-on-raw-264-7-mouse-macrophages-via-the-activation-of-pi3k-akt-signaling-pathway
#20
Yue Yang, Ronge Xing, Song Liu, Yukun Qin, Kecheng Li, Huahua Yu, Pengcheng Li
To investigate the immunostimulatory effects of chitosan sulfates, we prepared α- and β-chitosan sulfates with different molecular weights and compared their immunostimulatory activities in RAW 264.7 macrophages. Results suggest that β-chitosan sulfates were more active than α-chitosan in promoting nitric oxide (NO) production. Further study show that β-chitosan sulfate significantly promoted the production of NO, prostaglandin E2, tumor necrosis factor (TNF)-α, interleukin-6 and interleukin-1β at the levels of transcription and translation...
November 9, 2017: International Journal of Biological Macromolecules
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