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https://www.readbyqxmd.com/read/28102395/sesamol-ameliorates-high-fat-and-high-fructose-induced-cognitive-defects-via-improving-insulin-signaling-disruption-in-the-central-nervous-system
#1
Zhigang Liu, Yali Sun, Qinglian Qiao, Tong Zhao, Wentong Zhang, Bo Ren, Qian Liu, Xuebo Liu
Sesamol, a nutritional component from sesame, possesses antioxidant, lipid lowering and antidepressant activities. Nonetheless, few studies report its effects on high-energy-dense diet-induced cognitive loss. The present research aimed to elucidate the action of sesamol on high-fat and high-fructose (HFFD) "western"-diet-induced central nervous system insulin resistance and learning and memory impairment, and further determined the possible underlying mechanism. 3 month-old C57BL/6J mice were divided into 3 groups with/without sesamol in the drinking water (0...
January 19, 2017: Food & Function
https://www.readbyqxmd.com/read/28102344/predicting-drug-combination-index-and-simulating-the-network-regulation-dynamics-by-mathematical-modeling-of-drug-targeted-egfr-erk-signaling-pathway
#2
Lu Huang, Yuyang Jiang, Yuzong Chen
Synergistic drug combinations enable enhanced therapeutics. Their discovery typically involves the measurement and assessment of drug combination index (CI), which can be facilitated by the development and applications of in-silico CI predictive tools. In this work, we developed and tested the ability of a mathematical model of drug-targeted EGFR-ERK pathway in predicting CIs and in analyzing multiple synergistic drug combinations against observations. Our mathematical model was validated against the literature reported signaling, drug response dynamics, and EGFR-MEK drug combination effect...
January 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28102297/whsc1l1-mediated-egfr-mono-methylation-enhances-the-cytoplasmic-and-nuclear-oncogenic-activity-of-egfr-in-head-and-neck-cancer
#3
Vassiliki Saloura, Theodore Vougiouklakis, Makda Zewde, Xiaolan Deng, Kazuma Kiyotani, Jae-Hyun Park, Yo Matsuo, Mark Lingen, Takehiro Suzuki, Naoshi Dohmae, Ryuji Hamamoto, Yusuke Nakamura
While multiple post-translational modifications have been reported to regulate the function of epidermal growth factor receptor (EGFR), the effect of protein methylation on its function has not been well characterized. In this study, we show that WHSC1L1 mono-methylates lysine 721 in the tyrosine kinase domain of EGFR, and that this methylation leads to enhanced activation of its downstream ERK cascade without EGF stimulation. We also show that EGFR K721 mono-methylation not only affects the function of cytoplasmic EGFR, but also that of nuclear EGFR...
January 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28101568/puerarin-inhibits-m2-polarization-and-metastasis-of-tumor-associated-macrophages-from-nsclc-xenograft-model-via-inactivating-mek-erk-1-2-pathway
#4
Honggang Kang, Jing Zhang, Baozhong Wang, Meirong Liu, Jun Zhao, Mengxiang Yang, Yingxue Li
Non-small cell lung carcinoma (NSCLC) metastasis is responsible for most of cancer-related mortality. The tumor associated macrophages (TAMs) are known to be crucial cells in lung cancer and are usually divided into two antagonistic types, M1 and M2. Puerarin has a wide spectrum of pharmacological properties. The present study explores puerarin on macrophage polarization and metastasis of NSCLC. The results demonstrated that puerarin inhibited tumor growth and tumor volumes in NSCLC xenograft model, increased M1 markers [CD197+, inducible nitric oxide synthase (iNOS)+, CD40+)] and reduced M2 markers (CD206+, Arg-1+ and CD163+)...
February 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28101246/detection-of-microrna-200b-may-predict-the-inhibitory-effect-of-gefitinib-on-non-small-cell-lung-cancer-and-its-potential-mechanism
#5
Zhiwu Liu, Liqiong Yao, Bangyun Tan, Li Li, Baojin Chen
The present study aimed to investigate the association and underlying mechanisms between microRNA-200b level and the inhibitory effect of gefitinib on non-small cell lung cancer. In total, 100 patients (43 males and 57 females; median age, 63 years) with advanced non-small cell lung cancer (NSCLC) were selected. All patients were administered with gefitinib orally (250 mg/day) and the effect of gefitinib was evaluated according to the Response Evaluation Criteria in Solid Tumors guidelines. Tumor tissue and plasma samples were collected prior to and subsequent to therapy...
December 2016: Oncology Letters
https://www.readbyqxmd.com/read/28101233/lipid-raft-localization-of-epidermal-growth-factor-receptor-alters-matrix-metalloproteinase-1-expression-in-siha-cells-via-the-mapk-erk-signaling-pathway
#6
Zongfeng Zhang, Lina Wang, Juan Du, Yuanbo Li, Huilun Yang, Chenxi Li, Hui Li, Haiyang Hu
Matrix metalloproteinase-1 (MMP-1) has been identified as an important participant in tumor invasion, metastasis and angiogenesis. The purpose of the present study was to investigate the effects of epidermal growth factor receptor (EGFR) localization to lipid rafts on signaling pathways involved in the regulation of MMP-1 expression in SiHa cells, a cervical cancer cell line. EGFR activation by EGF specifically induced MMP-1 expression at both the messenger RNA and protein levels. Additionally, it was observed that EGFR localized to lipid rafts, and that the redistribution of EGFR induced by lipid raft disruption strengthened EGF-induced MMP-1 expression...
December 2016: Oncology Letters
https://www.readbyqxmd.com/read/28101165/functions-of-microrna-143-in-the-apoptosis-invasion-and-migration-of-nasopharyngeal-carcinoma
#7
Jin-Hui Chen, Rui Yang, Wei Zhang, Yong-Ping Wang
Nasopharyngeal carcinoma (NPC) is a common cancer characterized by poor prognosis in areas of Southern China where it is endemic. microRNAs (miRNAs) are a class of naturally occurring small noncoding RNAs, some of which contribute to the initiation and development of cancer. The current study was designed to examine the expression level of miR-143 in NPC tissues. The potential functional targets of miR-143 involved in tumor apoptosis, invasion and migration were also investigated. Reverse transcription-quantitative polymerase chain reaction was used to evaluate the expression levels of miR-143 in clinical NPC specimens...
December 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28100868/growth-inhibition-of-refractory-human-gallbladder-cancer-cells-by-retinol-and-its-mechanism-of-action
#8
Chuan Li, Masahiko Imai, Shinya Hasegawa, Masahiro Yamasaki, Noriko Takahashi
Among the constituents of the essential nutrient vitamin A, retinol is a potent suppressor of refractory cancer cell growth linked to tumor progression, showing greater efficacy than retinoic acid (RA). However, the mechanisms of retinol action on human refractory cancer are not known well. In the current study, we examined the actions of retinol on proliferation of human gallbladder cancer NOZ C-1 cells. Retinol and RA inhibited the proliferation of human NOZ C-1 cells in dose-dependent manner, while RA was less potent than retinol...
January 18, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28100485/quantification-of-growth-factor-signaling-and-pathway-crosstalk-by-live-cell-imaging
#9
Sean M Gross, Peter Rotwein
Peptide growth factors stimulate cellular responses through activation of their trans-membrane receptors. Multiple intracellular signaling cascades are engaged following growth factor - receptor binding, leading to short- and long-term biological effects. Each receptor-activated signaling pathway does not act in isolation, but rather interacts at different levels with other pathways to shape signaling networks that are distinctive for each growth factor. To gain insights into the specifics of growth factor-regulated interactions among different signaling cascades, we developed a HeLa cell line stably expressing fluorescent live-cell imaging reporters that are readouts for two major growth factor-stimulated pathways, Ras - Raf - Mek - Erk and PI3-kinase - Akt...
January 18, 2017: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/28100386/-effect-of-extracellular-signal-regulated-kinas-1-2-expression-and-hpv16-infection-and-their-interaction-in-progression-of-cervical-cancerization
#10
S L Fan, L Ding, Z Y Ren, X Chen, X S Sun, C C Li, C L Liu, W L Jia, Q L Li, J T Wang
Objective: To investigate the effect of ERK1/2 protein expression and HPV16 infection, as well as their interaction in the cervical carcinogenesis. Methods: A total of 176 patients, including 34 cases with normal cervix (NC), 26 cases with cervical intraepithelial neoplasm Ⅰ (CIN Ⅰ), 57 cases with cervical intraepithelial neoplasm Ⅱ/Ⅲ (CIN Ⅱ/Ⅲ) and 59 cases with cervical squamous cell carcinoma (SCC), were enrolled from Shanxi Tumor Hospital, Shanxi Maternal and Child Health Center, Jincheng Coal General Hospital from September 2013 to March 2014...
January 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28100259/antitumor-activity-of-mir-34a-in-peritoneal-mesothelioma-relies-on-c-met-and-axl-inhibition-persistent-activation-of-erk-and-akt-signaling-as-a-possible-cytoprotective-mechanism
#11
Rihan El Bezawy, Michelandrea De Cesare, Marzia Pennati, Marcello Deraco, Paolo Gandellini, Valentina Zuco, Nadia Zaffaroni
BACKGROUND: The value of microRNAs (miRNAs) as novel targets for cancer therapy is now widely recognized. However, no information is currently available on the expression/functional role of miRNAs in diffuse malignant peritoneal mesothelioma (DMPM), a rapidly lethal disease, poorly responsive to conventional treatments, for which the development of new therapeutic strategies is urgently needed. Here, we evaluated the expression and biological effects of miR-34a-one of the most widely deregulated miRNAs in cancer and for which a lipid-formulated mimic is already clinically available-in a large cohort of DMPM clinical samples and a unique collection of in house-developed preclinical models, with the aim to assess the potential of a miR-34a-based approach for disease treatment...
January 18, 2017: Journal of Hematology & Oncology
https://www.readbyqxmd.com/read/28099942/bigh3-silencing-increases-retinoblastoma-tumor-growth-in-the-murine-sv40-tag-rb-model
#12
Nathalie Allaman-Pillet, Anne Oberson, Daniel F Schorderet
BIGH3, a secreted protein of the extracellular matrix interacts with collagen and integrins on the cell surface. BIGH3 can have opposing functions in cancer, acting either as tumor suppressor or promoter by enhancing tumor progression and angiogenesis. In the eye, BIGH3 is expressed in the cornea and the retinal pigment epithelium and could impact on the development of retinoblastoma, the most common paediatric intraocular neoplasm. Retinoblastoma initiation requires the inactivation of both alleles of the RB1 tumor suppressor gene in the developing retina and tumor progression involves additional genomic changes...
January 14, 2017: Oncotarget
https://www.readbyqxmd.com/read/28099871/fluoride-and-arsenic-exposure-affects-spatial-memory-and-activates-the-erk-creb-signaling-pathway-in-offspring-rats
#13
Yu-Peng Zhu, Shu-Hua Xi, Ming-Yan Li, Ting-Ting Ding, Nan Liu, Fu-Yuan Cao, Yang Zeng, Xiao-Jing Liu, Jun-Wang Tong, Shou-Fang Jiang
Fluoride and arsenic are inorganic contaminants that occur in the natural environment. Chronic fluoride and/or arsenic exposure can induce developmental neurotoxicity and negatively influence intelligence in children, although the underlying molecular mechanisms are poorly understood. This study explored the effects of fluoride and arsenic exposure in drinking water on spatial learning, memory and key protein expression in the ERK/CREB signaling pathway in hippocampal and cerebral cortex tissue in rat offspring...
January 15, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28099845/absence-of-neurofibromin-induces-an-oncogenic-metabolic-switch-via-mitochondrial-erk-mediated-phosphorylation-of-the-chaperone-trap1
#14
Ionica Masgras, Francesco Ciscato, Anna Maria Brunati, Elena Tibaldi, Stefano Indraccolo, Matteo Curtarello, Federica Chiara, Giuseppe Cannino, Elena Papaleo, Matteo Lambrughi, Giulia Guzzo, Alberto Gambalunga, Marco Pizzi, Vincenza Guzzardo, Massimo Rugge, Stefania Edith Vuljan, Fiorella Calabrese, Paolo Bernardi, Andrea Rasola
Mutations in neurofibromin, a Ras GTPase-activating protein, lead to the tumor predisposition syndrome neurofibromatosis type 1. Here, we report that cells lacking neurofibromin exhibit enhanced glycolysis and decreased respiration in a Ras/ERK-dependent way. In the mitochondrial matrix of neurofibromin-deficient cells, a fraction of active ERK1/2 associates with succinate dehydrogenase (SDH) and TRAP1, a chaperone that promotes the accumulation of the oncometabolite succinate by inhibiting SDH. ERK1/2 enhances both formation of this multimeric complex and SDH inhibition...
January 17, 2017: Cell Reports
https://www.readbyqxmd.com/read/28099346/liuwei-dihuang-pill-treats-diabetic-nephropathy-in-rats-by-inhibiting-of-tgf-%C3%AE-smads-mapk-and-nf-kb-and-upregulating-expression-of-cytoglobin-in-renal-tissues
#15
Zhong Ju Xu, Shi Shu, Zhi Jie Li, Yu Min Liu, Rui Yi Zhang, Yue Zhang
Liuwei Dihuang pill (LDP) was assessed for its effects on renal deficiency.90 STZ induced DN rats were divided into groups (n = 22) without treatment (STZ) and LDP treated (STZ-L) (n = 23), Zhenwu decoction treated (STZ-Z) (n = 22), and valsartan treated (STZ-V) (n = 23) groups, with 16 normal control rats. Total urine protein (TP), blood urea nitrogen (BUN), and serum creatinine (Cr) were measured. Superoxide dismutase (SOD), nitric oxide synthase (NOS), and malondialdehyde (MDA) concentrations as well as expression/phosphorylation of SMAD3, SMAD2, and α-SMA, TGF-β, RI /II, P38, ERK, and NF-kB in renal tissues were determined...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28098804/gadd45a-regulates-olaquindox-induced-dna-damage-and-s-phase-arrest-in-human-hepatoma-g2-cells-via-jnk-p38-pathways
#16
Daowen Li, Chongshan Dai, Xiayun Yang, Bin Li, Xilong Xiao, Shusheng Tang
Olaquindox, a quinoxaline 1,4-dioxide derivative, is widely used as a feed additive in many countries. The potential genotoxicity of olaquindox, hence, is of concern. However, the proper mechanism of toxicity was unclear. The aim of the present study was to investigate the effect of growth arrest and DNA damage 45 alpha (GADD45a) on olaquindox-induced DNA damage and cell cycle arrest in HepG2 cells. The results showed that olaquindox could induce reactive oxygen species (ROS)-mediated DNA damage and S-phase arrest, where increases of GADD45a, cyclin A, Cdk 2, p21 and p53 protein expression, decrease of cyclin D1 and the activation of phosphorylation-c-Jun N-terminal kinases (p-JNK), phosphorylation-p38 (p-p38) and phosphorylation-extracellular signal-regulated kinases (p-ERK) were involved...
January 13, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28098162/novel-genetic-loci-associated-with-hippocampal-volume
#17
Derrek P Hibar, Hieab H H Adams, Neda Jahanshad, Ganesh Chauhan, Jason L Stein, Edith Hofer, Miguel E Renteria, Joshua C Bis, Alejandro Arias-Vasquez, M Kamran Ikram, Sylvane Desrivières, Meike W Vernooij, Lucija Abramovic, Saud Alhusaini, Najaf Amin, Micael Andersson, Konstantinos Arfanakis, Benjamin S Aribisala, Nicola J Armstrong, Lavinia Athanasiu, Tomas Axelsson, Ashley H Beecham, Alexa Beiser, Manon Bernard, Susan H Blanton, Marc M Bohlken, Marco P Boks, Janita Bralten, Adam M Brickman, Owen Carmichael, M Mallar Chakravarty, Qiang Chen, Christopher R K Ching, Vincent Chouraki, Gabriel Cuellar-Partida, Fabrice Crivello, Anouk Den Braber, Nhat Trung Doan, Stefan Ehrlich, Sudheer Giddaluru, Aaron L Goldman, Rebecca F Gottesman, Oliver Grimm, Michael E Griswold, Tulio Guadalupe, Boris A Gutman, Johanna Hass, Unn K Haukvik, David Hoehn, Avram J Holmes, Martine Hoogman, Deborah Janowitz, Tianye Jia, Kjetil N Jørgensen, Nazanin Karbalai, Dalia Kasperaviciute, Sungeun Kim, Marieke Klein, Bernd Kraemer, Phil H Lee, David C M Liewald, Lorna M Lopez, Michelle Luciano, Christine Macare, Andre F Marquand, Mar Matarin, Karen A Mather, Manuel Mattheisen, David R McKay, Yuri Milaneschi, Susana Muñoz Maniega, Kwangsik Nho, Allison C Nugent, Paul Nyquist, Loes M Olde Loohuis, Jaap Oosterlaan, Martina Papmeyer, Lukas Pirpamer, Benno Pütz, Adaikalavan Ramasamy, Jennifer S Richards, Shannon L Risacher, Roberto Roiz-Santiañez, Nanda Rommelse, Stefan Ropele, Emma J Rose, Natalie A Royle, Tatjana Rundek, Philipp G Sämann, Arvin Saremi, Claudia L Satizabal, Lianne Schmaal, Andrew J Schork, Li Shen, Jean Shin, Elena Shumskaya, Albert V Smith, Emma Sprooten, Lachlan T Strike, Alexander Teumer, Diana Tordesillas-Gutierrez, Roberto Toro, Daniah Trabzuni, Stella Trompet, Dhananjay Vaidya, Jeroen Van der Grond, Sven J Van der Lee, Dennis Van der Meer, Marjolein M J Van Donkelaar, Kristel R Van Eijk, Theo G M Van Erp, Daan Van Rooij, Esther Walton, Lars T Westlye, Christopher D Whelan, Beverly G Windham, Anderson M Winkler, Katharina Wittfeld, Girma Woldehawariat, Christiane Wolf, Thomas Wolfers, Lisa R Yanek, Jingyun Yang, Alex Zijdenbos, Marcel P Zwiers, Ingrid Agartz, Laura Almasy, David Ames, Philippe Amouyel, Ole A Andreassen, Sampath Arepalli, Amelia A Assareh, Sandra Barral, Mark E Bastin, Diane M Becker, James T Becker, David A Bennett, John Blangero, Hans van Bokhoven, Dorret I Boomsma, Henry Brodaty, Rachel M Brouwer, Han G Brunner, Randy L Buckner, Jan K Buitelaar, Kazima B Bulayeva, Wiepke Cahn, Vince D Calhoun, Dara M Cannon, Gianpiero L Cavalleri, Ching-Yu Cheng, Sven Cichon, Mark R Cookson, Aiden Corvin, Benedicto Crespo-Facorro, Joanne E Curran, Michael Czisch, Anders M Dale, Gareth E Davies, Anton J M De Craen, Eco J C De Geus, Philip L De Jager, Greig I De Zubicaray, Ian J Deary, Stéphanie Debette, Charles DeCarli, Norman Delanty, Chantal Depondt, Anita DeStefano, Allissa Dillman, Srdjan Djurovic, Gary Donohoe, Wayne C Drevets, Ravi Duggirala, Thomas D Dyer, Christian Enzinger, Susanne Erk, Thomas Espeseth, Iryna O Fedko, Guillén Fernández, Luigi Ferrucci, Simon E Fisher, Debra A Fleischman, Ian Ford, Myriam Fornage, Tatiana M Foroud, Peter T Fox, Clyde Francks, Masaki Fukunaga, J Raphael Gibbs, David C Glahn, Randy L Gollub, Harald H H Göring, Robert C Green, Oliver Gruber, Vilmundur Gudnason, Sebastian Guelfi, Asta K Håberg, Narelle K Hansell, John Hardy, Catharina A Hartman, Ryota Hashimoto, Katrin Hegenscheid, Andreas Heinz, Stephanie Le Hellard, Dena G Hernandez, Dirk J Heslenfeld, Beng-Choon Ho, Pieter J Hoekstra, Wolfgang Hoffmann, Albert Hofman, Florian Holsboer, Georg Homuth, Norbert Hosten, Jouke-Jan Hottenga, Matthew Huentelman, Hilleke E Hulshoff Pol, Masashi Ikeda, Clifford R Jack, Mark Jenkinson, Robert Johnson, Erik G Jönsson, J Wouter Jukema, René S Kahn, Ryota Kanai, Iwona Kloszewska, David S Knopman, Peter Kochunov, John B Kwok, Stephen M Lawrie, Hervé Lemaître, Xinmin Liu, Dan L Longo, Oscar L Lopez, Simon Lovestone, Oliver Martinez, Jean-Luc Martinot, Venkata S Mattay, Colm McDonald, Andrew M McIntosh, Francis J McMahon, Katie L McMahon, Patrizia Mecocci, Ingrid Melle, Andreas Meyer-Lindenberg, Sebastian Mohnke, Grant W Montgomery, Derek W Morris, Thomas H Mosley, Thomas W Mühleisen, Bertram Müller-Myhsok, Michael A Nalls, Matthias Nauck, Thomas E Nichols, Wiro J Niessen, Markus M Nöthen, Lars Nyberg, Kazutaka Ohi, Rene L Olvera, Roel A Ophoff, Massimo Pandolfo, Tomas Paus, Zdenka Pausova, Brenda W J H Penninx, G Bruce Pike, Steven G Potkin, Bruce M Psaty, Simone Reppermund, Marcella Rietschel, Joshua L Roffman, Nina Romanczuk-Seiferth, Jerome I Rotter, Mina Ryten, Ralph L Sacco, Perminder S Sachdev, Andrew J Saykin, Reinhold Schmidt, Helena Schmidt, Peter R Schofield, Sigurdur Sigursson, Andrew Simmons, Andrew Singleton, Sanjay M Sisodiya, Colin Smith, Jordan W Smoller, Hilkka Soininen, Vidar M Steen, David J Stott, Jessika E Sussmann, Anbupalam Thalamuthu, Arthur W Toga, Bryan J Traynor, Juan Troncoso, Magda Tsolaki, Christophe Tzourio, Andre G Uitterlinden, Maria C Valdés Hernández, Marcel Van der Brug, Aad van der Lugt, Nic J A van der Wee, Neeltje E M Van Haren, Dennis van 't Ent, Marie-Jose Van Tol, Badri N Vardarajan, Bruno Vellas, Dick J Veltman, Henry Völzke, Henrik Walter, Joanna M Wardlaw, Thomas H Wassink, Michael E Weale, Daniel R Weinberger, Michael W Weiner, Wei Wen, Eric Westman, Tonya White, Tien Y Wong, Clinton B Wright, Ronald H Zielke, Alan B Zonderman, Nicholas G Martin, Cornelia M Van Duijn, Margaret J Wright, W T Longstreth, Gunter Schumann, Hans J Grabe, Barbara Franke, Lenore J Launer, Sarah E Medland, Sudha Seshadri, Paul M Thompson, M Arfan Ikram
The hippocampal formation is a brain structure integrally involved in episodic memory, spatial navigation, cognition and stress responsiveness. Structural abnormalities in hippocampal volume and shape are found in several common neuropsychiatric disorders. To identify the genetic underpinnings of hippocampal structure here we perform a genome-wide association study (GWAS) of 33,536 individuals and discover six independent loci significantly associated with hippocampal volume, four of them novel. Of the novel loci, three lie within genes (ASTN2, DPP4 and MAST4) and one is found 200 kb upstream of SHH...
January 18, 2017: Nature Communications
https://www.readbyqxmd.com/read/28097825/signalling-pathways-involved-in-hypoxia-induced-renal-fibrosis
#18
REVIEW
Minna Liu, Xiaoxuan Ning, Rong Li, Zhen Yang, Xiaoxia Yang, Shiren Sun, Qi Qian
Renal fibrosis is the common pathological hallmark of progressive chronic kidney disease (CKD) with diverse aetiologies. Recent researches have highlighted the critical role of hypoxia during the development of renal fibrosis as a final common pathway in end-stage kidney disease (ESKD), which joints the scientist's attention recently to exploit the molecular mechanism underlying hypoxia-induced renal fibrogenesis. The scaring formation is a multilayered cellular response and involves the regulation of multiple hypoxia-inducible signalling pathways and complex interactive networks...
January 18, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28097093/vascular-endothelial-growth-factor-suppresses-tnfsf15-production-in-endothelial-cells-by-stimulating-mir-31-and-mir-20a-expression-via-activation-of-akt-and-erk-signals
#19
Hui-Ting Deng, Hai-Lin Liu, Bei-Bei Zhai, Kun Zhang, Guo-Ce Xu, Xue-Mei Peng, Qiang-Zhe Zhang, Lu-Yuan Li
Tumor necrosis factor superfamily-15 (TNFSF15; VEGI; TL1A) is a negative modulator of angiogenesis for blood vessel homeostasis and is produced by endothelial cells in a mature vasculature. It is known to be downregulated by vascular endothelial growth factor (VEGF), a major regulator of neovascularization but the mechanism of this interaction is unclear. Here we report that VEGF is able to stimulate the production of two microRNAs, miR-20a and miR-31, which directly target the 3'-UTR of TNFSF15. Additionally, we show that two VEGF-stimulated cell growth signals, Erk and Akt, are responsible for promoting the expression of miR-20a and miR-31...
January 2017: FEBS Open Bio
https://www.readbyqxmd.com/read/28096344/atrial-natriuretic-peptide-regulates-adipose-tissue-accumulation-in-adult-atria
#20
Nadine Suffee, Thomas Moore-Morris, Patrick Farahmand, Catherine Rücker-Martin, Gilles Dilanian, Magali Fradet, Daigo Sawaki, Geneviève Derumeaux, Pascal LePrince, Karine Clément, Isabelle Dugail, Michel Puceat, Stéphane N Hatem
The abundance of epicardial adipose tissue (EAT) is associated with atrial fibrillation (AF), the most frequent cardiac arrhythmia. However, both the origin and the factors involved in EAT expansion are unknown. Here, we found that adult human atrial epicardial cells were highly adipogenic through an epithelial-mesenchymal transition both in vitro and in vivo. In a genetic lineage tracing the WT1(CreERT2+/-)Rosa(tdT+/-) mouse model subjected to a high-fat diet, adipocytes of atrial EAT derived from a subset of epicardial progenitors...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
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