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https://www.readbyqxmd.com/read/29032210/chemical-composition-of-cyclocarya-paliurus-polysaccharide-and-inflammatory-effects-in-lipopolysaccharide-stimulated-raw264-7-macrophage
#1
Lei-Xiong, Ke-Hui Ouyang, Yan-Jiang, Zhan-Wei Yang, Wen-Bing Hu, Hui-Chen, Ning-Wang, Xin-Liu, Wen-Jun Wang
This study was designed to study the chemical composition of Cyclocarya paliurus polysaccharide and inflammatory effects in lipopolysaccharide (LPS)-stimulated RAW264.7 macrophage. A new elution (0.3% NaCl aqueous solution) of Cyclocarya paliurus polysaccharide (CPP-3) was characterized by different methods such as fourier transform infrared spectra (FT-IR), UV-vis, gas chromatography-mass spectrometry (GC-MS), high performance gel chromatography (HPGLC) and scanning electron microscopy (SEM). Cell viability was measured by MTT test, phagocytosis assay was measured by Neutral red uptake assay, nitrite was measured by Griess assay, TNF-α and IL-1β analysis were measured by ELISA, PGE2 was measured by enzyme immunoassay system...
October 12, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29032204/angtensin-ii-elicits-a-camp-dependent-intestinal-anion-secretion-by-stimulating-pge2-release-through-at1-subtype-receptors-in-rat-ileum
#2
Ling Xiao, Hong-Wei Liu, Hong Di, Li-Xin Chen, Qing Zhou, Xin Yu, Haiyan Jing, Shuhai Tang
A growing literature has demonstrated that the renin-angiotensin system (RAS) involves in gut function. Angiotensin II (AngII) stimulates Cl(-) secretion in intestine epithelial cells. However, the underlying signal pathway remains unexplored. Here, we explored that serosal application of Ang II (5 × 10(-8) M) significantly increased the baseline Isc compared to the control group in rat ileum. Tetrodotoxin (TTX) failed to suppress Isc evoked by Ang II. However, the Ang II-evoked Isc was significantly suppressed by the ATR1 antagonist losartan instead of ATR2 antagonist PD123319...
October 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29032033/effect-of-mofezolac-galactose-distance-in-conjugates-targeting-cyclooxygenase-cox-1-and-cns-glut-1-carrier
#3
Maria Grazia Perrone, Paola Vitale, Savina Ferorelli, Angelina Boccarelli, Mauro Coluccia, Alessandra Pannunzio, Federica Campanella, Giuseppe Di Mauro, Carmela Bonaccorso, Cosimo G Fortuna, Antonio Scilimati
Neuroinflammation is the earliest stage of several neurological and neurodegenerative diseases. In the case of neurodegenerative disorders, it takes place about 15-20 years before the appearance of specific neurodegenerative clinical symptoms. Constitutive microglial COX-1 is one of the pro-inflammatory players of the neuroinflammation. Novel compounds 3, 14 and 15 (Galmof0, Galmof5 and Galmof11, respectively) were projected, and their synthetic methodologies developed, by linking by an ester bond, directly or through a C5 or C11 unit linker the highly selective COX-1 inhibitor mofezolac (COXs selectivity index > 6000) to galactose in order to obtain substances capable to cross blood-brain barrier (BBB) and control the CNS inflammatory response...
September 30, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29031391/a-dose-response-study-of-the-effect-of-prostaglandin-e2-on-thermal-nociceptive-sensitivity
#4
Anthony F Domenichiello, Breanne C Wilhite, Gregory S Keyes, Christopher E Ramsden
Inhibition of prostaglandin (PG) biosynthesis has been used to relieve pain for thousands of years. Today non-steroidal anti-inflammatory drugs (which largely inhibit PG synthesis) are widely used to treat pain. Four main types of PGs (PGD2, PGE2, PGF2 and PGI2) are synthesized from arachidonic acid during inflammation and have been demonstrated to impact nociception. PGE2 has been the most studied and utilized for its pain producing properties and has been demonstrated to increase hypersensitivity in rodent nociceptive behavioral models when applied centrally and/or peripherally...
November 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/29031386/impact-of-conjugated-linoleic-acid-administered-to-rats-prior-and-after-carcinogenic-agent-on-arachidonic-and-linoleic-acid-metabolites-in-serum-and-tumors
#5
Małgorzata Jelińska, Agnieszka Białek, Iwona Gielecińska, Hanna Mojska, Andrzej Tokarz
The objective of the study was to assess the influence of conjugated linoleic acid (CLA) daily supplementation prior and after carcinogenic agent on the concentrations of eicosanoids - metabolites of arachidonic acid (15-, 12- or 5-hydroxyeicosatetraenoic acids (15-, 12-, 5-HETE), prostaglandin E2 (PGE2)) and linoleic acid (13- or 9-hydroxyoctadecadienoic acids (13-, 9-HODE)) in rat serum and 7,12-dimethylbenz[a]anthracene (DMBA)-induced tumors. Female rats were randomised into six groups, receiving 1% or 2% Bio-C...
November 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/29031075/discovery-of-new-indomethacin-based-analogs-with-potentially-selective-cyclooxygenase-2-inhibition-and-observed-diminishing-to-pge2-activities
#6
Shaymaa E Kassab, Mohammed A Khedr, Hamed I Ali, Mohamed M Abdalla
New ring-extended analogs of indomethacin were designed based on the structure of active binding site of both COX-1 and COX-2 isoenzymes and the interaction pattern required for selective inhibition of COX-2 to improve its selectivity against COX-2. The strategy adopted for designing the new inhibitors involved i) ring extension of indomethacin to reduce the possibility of analogs to be accommodated into the narrow hydrophobic tunnel of COX-1, ii) deletion of carboxylic acid to reduce the possibility of inhibitor to form salt bridge with Arg120 and eventually prevent COX-1 inhibition, and iii) introduction of methylsulfonyl group to increase the opportunity of the analogs to interact with the polar side pocket that's is crucial for inhibition process of COX-2...
September 28, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29028945/sphingosine-kinase-1-expression-in-peritoneal-macrophages-is-required-for-colon-carcinogenesis
#7
Hideki Furuya, Paulette M Tamashiro, Yoshiko Shimizu, Kayoko Iino, Rafael Peres, Runpu Chen, Yijun Sun, Yusuf A Hannun, Lina M Obeid, Toshihiko Kawamori
Accumulating evidence suggests that the sphingosine kinase 1 (SphK1)/sphingosine 1-phosphate (S1P) pathway plays a pivotal role in colon carcinogenesis. Our previous studies indicate that the SphK1/S1P pathway mediates colon carcinogenesis at least by regulating COX-2 expression and prostaglandin E2 (PGE2) production. However, the mechanisms by which this pathway regulates colon carcinogenesis are still unclear. First, we show that SphK1 deficient mice significantly attenuated azoxymethane (AOM)-induced colon carcinogenesis as measured by colon tumor incidence, multiplicity, and volume...
September 23, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/29027487/effect-of-tauroursodeoxycholic-acid-on-pufa-levels-and-inflammation-in-an-animal-and-cell-model-of-hepatic-endoplasmic-reticulum-stress
#8
M Aslan, E Kıraç, Ö Yılmaz, B Ünal, E K Konuk, F Özcan, H Tuzcu
The aim of this study was to evaluate hepatic polyunsaturated fatty acids (PUFAs) and inflammatory response in an animal and cell model of endoplasmic reticulum (ER) stress. Rats were divided into control, tunicamycin (TM)-treated, and TM + tauroursodeoxycholic acid (TUDCA)-treated groups. Hepatic ER stress was induced by TM and the ER stress inhibitor TUDCA was injected 30 min before induction of ER stress. Liver THLE-3 cells were treated with TM and TUDCA was administered in advance to decrease cytotoxic effects...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/29025423/downregulation-of-nmi-promotes-tumor-growth-and-predicts-poor-prognosis-in-human-lung-adenocarcinomas
#9
Jingshu Wang, Kun Zou, Xu Feng, Miao Chen, Cong Li, Ranran Tang, Yang Xuan, Meihua Luo, Wangbing Chen, Huijuan Qiu, Ge Qin, Yixin Li, Changlin Zhang, Binyi Xiao, Lan Kang, Tiebang Kang, Wenlin Huang, Xinfa Yu, Xiaojun Wu, Wuguo Deng
BACKGROUND: N-myc (and STAT) interactor (NMI) plays vital roles in tumor growth, progression, and metastasis. In this study, we identified NMI as a potential tumor suppressor in lung cancer and explored its molecular mechanism involved in lung cancer progression. METHODS: Human lung cancer cell lines and a mouse xenograft model was used to study the effect of NMI on tumor growth. The expression of NMI, COX-2 and relevant signaling proteins were examined by Western blot...
October 12, 2017: Molecular Cancer
https://www.readbyqxmd.com/read/29022246/alpha-lipoic-acid-mitigates-toxic-induced-demyelination-in-the-corpus-callosum-by-lessening-of-oxidative-stress-and-stimulation-of-polydendrocytes-proliferation
#10
Nima Sanadgol, Fereshteh Golab, Hassan Askari, Fatemeh Moradi, Marziyeh Ajdary, Mehdi Mehdizadeh
Multiple Sclerosis (MS), is a disease that degenerates myelin in central nervous system (CNS). Reactive oxygen species (ROSs) are toxic metabolites, and accumulating data indicate that ROSs-mediated apoptosis of oligodendrocytes (OLGs) plays a major role in the pathogenesis of MS under oxidative stress conditions. In this study, we investigated the role of endogenous antioxidant alpha-lipoic acid (ALA) as ROSs scavenger in the OLGs loss and myelin degeneration during cuprizone (cup)-induced demyelination in the experimental model of MS...
October 12, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/29016746/effects-of-low-magnitude-high-frequency-mechanical-vibration-combined-with-compressive-force-on-human-periodontal-ligament-cells-in-vitro
#11
Sutiwa Benjakul, Suwanna Jitpukdeebodintra, Chidchanok Leethanakul
Objective: Vibration can be used to accelerate tooth movement, though the exact mechanisms remain unclear. This study aimed to investigate the effects of low magnitude high frequency (LMHF) vibration combined with compressive force on periodontal ligament (PDL) cells in vitro. Materials and methods: Human PDL cells were isolated from extracted premolar teeth of four individuals. To determine the optimal frequency for later used in combination with compressive force, three cycles of low-magnitude (0...
September 7, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/29016438/ono-1301-enhances-in-vitro-osteoblast-differentiation-and-in-vivo-bone-formation-induced-by-bone-morphogenetic-protein
#12
Sadaaki Kanayama, Takashi Kaito, Kazuma Kitaguchi, Hiroyuki Ishiguro, Kunihiko Hashimoto, Ryota Chijimatsu, Satoru Otsuru, Shota Takenaka, Takahiro Makino, Yusuke Sakai, Akira Myoui, Hideki Yoshikawa
STUDY DESIGN: In vitro and in vivo assessment of osteogenic effect by prostacyclin agonist (ONO-1301) OBJECTIVE.: To investigate the effects of ONO-1301 on in vitro osteoblastic differentiation and in vivo bone formation induced by bone morphogenetic protein (BMP). SUMMARY OF BACKGROUND DATA: Among prostaglandins (PGs), PGE2 is the most abundant in bone tissue and its effects on bone formation have been well studied. PGI2 (prostacyclin) is the second most abundant PG in bone tissue and plays important roles in hemodynamics...
October 9, 2017: Spine
https://www.readbyqxmd.com/read/28993190/secretome-from-hypoxia-conditioned-adipose-derived-mesenchymal-stem-cells-promotes-the-healing-of-gastric-mucosal-injury-in-a-rodent-model
#13
Xianfeng Xia, Philip Wai Yan Chiu, Ping Kuen Lam, Wai Ching Chin, Enders Kwok Wai Ng, James Yun Wong Lau
Studies have indicated that the definitive engraftment and transdifferentiation potential of stem cells does not seem crucial for its property of tissue repair. Our previous study showed that transplantation of adipose-derived mesenchymal stem cells (ADMSCs) enhanced the healing of sutured gastric perforation. This study aimed to investigate the paracrine role of ADMSCs in the experimental gastric mucosal injury. Normoxia-conditioned medium (Nor CM) and hypoxia (HPO) CM were obtained after culturing ADMSCs in 20% O2 and 5% O2 for 48h...
October 6, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28991413/ligand-based-modeling-for-the-prediction-of-pharmacophore-features-for-multi-targeted-inhibition-of-the-arachidonic-acid-cascade
#14
Nisha Saroj Devi, Rajasekar Shanmugam, Jayanta Ghorai, Meera Ramanan, Pazhamalai Anbarasan, Mukesh Doble
The single-target drugs against the arachidonic acid inflammatory pathway are associated with serious side effects, hence, as a first step towards multi-target drugs, we have studied the pharmacophoric features common to the inhibitors of 5-lipoxygenase-activating protein (FLAP), microsomal prostaglandin E-synthase 1 (mPGES-1) and leukotriene A4 hydrolase (LTA4H). FLAP and mPGES-1 shared subfamily-specific positions (SSPs) and four mPGES-1 inhibitors binding to them mapped onto the pharmacophore derived from FLAP inhibitors (Ph-FLAP)...
October 9, 2017: Molecular Informatics
https://www.readbyqxmd.com/read/28990249/berberine-inhibits-the-chemotherapy-induced-repopulation-by-suppressing-the-arachidonic-acid-metabolic-pathway-and-phosphorylation-of-fak-in-ovarian-cancer
#15
Yawei Zhao, Lianzhi Cui, Yue Pan, Dan Shao, Xiao Zheng, Fan Zhang, Hansi Zhang, Kan He, Li Chen
OBJECTIVES: Cytotoxic chemotherapy is an effective and traditional treatment of ovarian cancer. However, chemotherapy-induced apoptosis may also trigger and ultimately accelerate the repopulation of the small number of adjacent surviving cells. This study mainly focused on the tumour cell repopulation caused by chemotherapy in ovarian cancer and the adjunctive/synergistic effect of Berberine on the prevention of tumour repopulation. MATERIALS AND METHODS: The transwell system was used to mimic the co-culture of surviving ovarian cancer cells in the microenvironment of cytotoxic chemotherapy-treated dying cells...
October 8, 2017: Cell Proliferation
https://www.readbyqxmd.com/read/28988972/arginine-vasopressin-antagonizes-the-effects-of-prostaglandin-e2-on-the-spontaneous-activity-of-warm-sensitive-and-temperature-insensitive-neurons-in-the-medial-preoptic-area-in-rats
#16
Jian-Hui Xu, Xiao-Yu Hou, Yu Tang, Rong Luo, Jie Zhang, Chang Liu, Yong-Lu Yang
Arginine vasopressin (AVP) plays an important role in thermoregulation and antipyresis. We have demonstrated that AVP could change the spontaneous activity of thermosensitive and temperature insensitive neurons in the preoptic area. However, whether AVP influences the effects of prostaglandin E2 (PGE2) on the spontaneous activity of neurons in the medial preoptic area (MPO) remains unclear. Our experiment showed that PGE2 decreased the spontaneous activity of warm-sensitive neurons, and increased that of low-slope temperature-insensitive neurons in the MPO...
October 6, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28988395/effect-of-roxithromycin-on-mucosal-damage-oxidative-stress-and-pro-inflammatory-markers-in-experimental-model-of-colitis
#17
Hilal Ahmad, Sneh Verma, Vijay L Kumar
OBJECTIVE AND DESIGN: Roxithromycin, a macrolide antibiotic, exhibits anti-inflammatory property. The present study was designed to evaluate its protective effect in a rat model of colitis. METHODS: The anti-inflammatory property of roxithromycin was first validated in rat paw edema model at 5 and 20 mg/kg doses where it produced 19 and 51% inhibition of paw swelling induced by carrageenan. The efficacy of roxithromycin was evaluated at these doses in a rat model where colitis was induced by intra-colonic instillation of acetic acid...
October 7, 2017: Inflammation Research: Official Journal of the European Histamine Research Society ... [et Al.]
https://www.readbyqxmd.com/read/28987783/engineering-fibrin-hydrogels-to-promote-the-wound-healing-potential-of-mesenchymal-stem-cell-spheroids
#18
Kaitlin C Murphy, Jacklyn Whitehead, Dejie Zhou, Steve S Ho, J Kent Leach
Mesenchymal stem cells (MSCs) secrete endogenous factors such as vascular endothelial growth factor (VEGF) and prostaglandin E2 (PGE2) that promote angiogenesis, modulate the inflammatory microenvironment, and stimulate wound repair, and MSC spheroids secrete more trophic factors than dissociated, individual MSCs. Compared to injection of cells alone, transplantation of MSCs in a biomaterial can enhance their wound healing potential by localizing cells at the defect site and upregulating trophic factor secretion...
October 5, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28985604/gold-nanoflowers-synthesized-using-acanthopanacis-cortex-extract-inhibit-inflammatory-mediators-in-lps-induced-raw264-7-macrophages-via-nf-%C3%AE%C2%BAb-and-ap-1-pathways
#19
Sungeun Ahn, Priyanka Singh, Mi Jang, Yu-Jin Kim, Verónica Castro-Aceituno, Shakina Yesmin Simu, Yeon Ju Kim, Deok-Chun Yang
We reported the rapid synthesis (<8s) of gold nanoparticles at room temperature using Acanthopanacis cortex extract (A-AuNPs). We characterized the A-AuNPs using several analytical techniques and found that nano-flower type A-AuNPs, which are known to possess a coarse surface with a high surface to volume ratio, conferring these particles with high binding capacity for various biological molecules. After confirming the stability of the nanoparticles, we investigated the anti-inflammatory effect of A-AuNPs in LPS-stimulated RAW264...
September 25, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28983247/microsomal-prostaglandin-e-synthase-1-expression-in-inflammatory-conditions-is-downregulated-by-dexamethasone-seminal-role-of-the-regulatory-phosphatase-mkp-1
#20
Lauri Tuure, Mari Hämäläinen, Brendan J Whittle, Eeva Moilanen
Microsomal prostaglandin E synthase-1 (mPGES-1) is an inducible enzyme situated downstream of cyclo-oxygenase-2, promoting the excessive PGE2 production in inflammation. Dexamethasone is known to suppress mPGES-1 but the mechanisms regulating mPGES-1 expression remain poorly known. MKP-1 is a phosphatase controlling the proinflammatory MAP kinase pathways p38 and JNK, thus limiting the inflammatory responses. We have now investigated the role of MKP-1 and MAP kinases p38 and JNK in the regulation of mPGES-1 expression by dexamethasone...
2017: Frontiers in Pharmacology
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