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FGF Receptor

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https://www.readbyqxmd.com/read/28339837/vitamin-d-treatment-attenuates-cardiac-fgf23-fgfr4-signaling-and-hypertrophy-in-uremic-rats
#1
Maren Leifheit-Nestler, Alexander Grabner, Laura Hermann, Beatrice Richter, Karin Schmitz, Dagmar-Christiane Fischer, Christopher Yanucil, Christian Faul, Dieter Haffner
Background.: Vitamin D deficiency and excess of circulating fibroblast growth factor 23 (FGF23) contribute to cardiovascular mortality in patients with chronic kidney disease (CKD). FGF23 activates FGF receptor 4 and (FGFR4) calcineurin/nuclear factor of activated T cells (NFAT) signaling in cardiac myocytes, thereby causing left ventricular hypertrophy (LVH). Here, we determined if 1,25-dihydroxyvitamin D (calcitriol) inhibits FGF23-induced cardiac signaling and LVH. Methods...
February 23, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28327938/targeting-the-fibroblast-growth-factor-receptor-2-in-gastric-cancer-promise-or-pitfall
#2
C Hierro, M Alsina, M Sánchez, V Serra, J Rodon, J Tabernero
Gastric cancer is the third leading cause of death from cancer worldwide. Systemic chemotherapy remains the mainstay therapeutic option for this poor prognosis cancer. Trastuzumab, the epidermal growth factor receptor 2 (ERBB2 or HER2)-antibody, is the only biological agent approved for the molecularly-selected population of HER2-positive gastric cancer patients. Over the last decade, several groups have been working for deepening into the molecular characterization of gastric cancer, shedding some light into the heterogeneity of this tumour...
March 7, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/28324011/a-novel-fc-fgf21-with-improved-resistance-to-proteolysis-increased-affinity-towards-%C3%AE-klotho-and-enhanced-efficacy-in-mice-and-cynomolgus-monkeys
#3
Shanaka Stanislaus, Randy Hecht, Junming Yie, Todd Hager, Michael Hall, Chris Spahr, Wei Wang, Jennifer Weiszmann, Yang Li, Liying Deng, Dwight Winters, Stephen Smith, Lei Zhou, Yuesheng Li, Murielle M Véniant, Jing Xu
FGF21 is a natural hormone that modulates glucose, lipid, and energy metabolism. Previously, we engineered an Fc fusion FGF21 variant with two mutations, Fc-FGF21(RG), to extend the half-life and reduce aggregation and in vivo degradation of FGF21. We now describe a new variant developed to reduce the extreme C-terminal degradation and improve the binding affinity to β-Klotho. We demonstrate, by introducing one additional mutation located at the C-terminus of FGF21 (A180E) that the new molecule, Fc-FGF21(RGE), has gained many improved attributes...
January 26, 2017: Endocrinology
https://www.readbyqxmd.com/read/28318623/the-complexity-of-chronic-kidney-disease-mineral-and-bone-disorder-across-stages-of-chronic-kidney%C3%A2-disease
#4
Fabiana G Graciolli, Katia R Neves, Fellype Barreto, Daniela V Barreto, Luciene M Dos Reis, Maria E Canziani, Yves Sabbagh, Aluizio B Carvalho, Vanda Jorgetti, Rosilene M Elias, Susan Schiavi, Rosa M A Moysés
Chronic Kidney Disease (CKD)-Mineral and Bone Disorder (CKD-MBD) is a complex disease that is not completely understood. However, some factors secreted by the osteocytes might play an important role in its pathophysiology. Therefore, we evaluated the bone expression of proteins in a group of patients with CKD 2-3, CKD 4, and CKD 5 on dialysis and healthy individuals. We also tested several bone remodeling markers, and correlated these levels with bone biopsy findings. As expected, as serum calcium decreased, serum phosphate, alkaline phosphatase, fibroblast growth factor-23 (FGF-23), parathyroid hormone, and osteoprotegerin increased, as CKD progressed...
March 15, 2017: Kidney International
https://www.readbyqxmd.com/read/28315901/the-effect-of-sitagliptin-on-lipid-metabolism-of-fatty-liver-mice-and-related-mechanisms
#5
Bilin Xu, Tian Shen, Lin Chen, Juan Xia, Cuiping Zhang, Hongping Wang, Ming Yu, Tao Lei
BACKGROUND In clinics, patients with type 2 diabetes complicated with non-alcoholic fatty liver disease (NAFLD) have been shown to receive significant improvements in blood glucose levels, lipid levels, and liver function after sitagliptin treatment, although the mechanism of drug action remains poorly understood. This study investigated the possible mechanism of sitagliptin on lipid metabolism of NAFLD mice. MATERIAL AND METHODS Male C57/BL6 mice were induced for NAFLD via 16 weeks of a high-fat diet, and were treated with 15 mg/kg/day sitagliptin for 16 consecutive weeks...
March 19, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28298438/single-cell-analysis-reveals-lineage-segregation-in-early-post-implantation-mouse-embryos
#6
Jing Wen, Yanwu Zeng, Zhuoqing Fang, Junjie Gu, Laixiang Ge, Fan Tang, Zepeng Qu, Jing Hu, Yaru Cui, Kunshan Zhang, Junbang Wang, Siguang Li, Yi Sun, Ying Jin
The mammalian post-implantation embryo has been extensively investigated at the tissue level. However, to unravel the molecular basis for the cell-fate plasticity and determination, it is essential to study the characteristics of individual cells. Especially, the individual definitive endoderm (DE) cells have not been characterized in vivo. Here, we report gene expression patterns in single cells freshly isolated from mouse embryos on days 5.5 and 6.5. Initial transcriptome data from 124 single cells yielded signature genes for the epiblast, visceral endoderm, and extra-embryonic ectoderm and revealed a unique distribution pattern of fibroblast growth factor (Fgf) ligands and receptors...
March 15, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28287551/temporal-ordering-of-dynamic-expression-data-from-detailed-spatial-expression-maps
#7
Charlotte S L Bailey, Robert A Bone, Philip J Murray, J Kim Dale
During somitogenesis, pairs of epithelial somites form in a progressive manner, budding off from the anterior end of the pre-somitic mesoderm (PSM) with a strict species-specific periodicity. The periodicity of the process is regulated by a molecular oscillator, known as the "segmentation clock," acting in the PSM cells. This clock drives the oscillatory patterns of gene expression across the PSM in a posterior-anterior direction. These so-called clock genes are key components of three signaling pathways: Wnt, Notch, and fibroblast growth factor (FGF)...
February 9, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28267132/pentraxin3-as-a-new-indicator-of-cardiovascular-related-death-in-patients-with-advanced-chronic-kidney-disease
#8
Marcin Krzanowski, Katarzyna Krzanowska, Mariusz Gajda, Paulina Dumnicka, Artur Dziewierz, Karolina Woziwodzka, Jan A Litwin, Władysław Sułowicz
INTRODUCTION    Pentraxin3 (PTX3) play an important role in the inflammatory response, taking part in recognizing pathogens and damaged tissues. OBJECTIVES    The aim of the study was to assess the relationship between PTX3 levels and all-cause and cardiovascular (CV) mortality in chronic kidney disease (CKD) patients during five-year observation period.  PATIENTS AND METHODS    The study comprised 78 patients (51 hemodialyzed, 27 predialysis). The examined parameters included PTX3, calcium, phosphate, iPTH, interleukin-6 (IL-6), fibroblast growth factor 23 (FGF-23), osteopontin (OPN), osteoprotegerin (OPG), osteocalcin (OC), osteopontin (OPN), osteoprotegerin (OPG), osteocalcin, tumor necrosis factor receptor II (TNF-R II), transforming growth factor-β (TGF-β), hepatocyte growth factor (HGF), stromal cell-derived factor α (SDF1α), and thrombomodulin (TM)...
February 27, 2017: Pol Arch Intern Med
https://www.readbyqxmd.com/read/28263980/an-fgfr-inhibitor-converts-the-tumor-promoting-effect-of-tgf-%C3%AE-by-the-induction-of-fibroblast-associated-genes-of-hepatoma-cells
#9
H-R Zhang, X-D Wang, X Yang, D Chen, J Hao, R Cao, X-Z Wu
Tumors consistently mimic wound-generating chronic inflammation; however, why they do not heal like wounds with fibrotic scars remains unknown. The components of the tumor microenvironment, such as transforming growth factor β (TGF-β) and fibroblast growth factors (FGFs), may account for this phenomenon. Tumor formation involves continuous activation of the FGF pathway, whereas the repair of tissue injury is a self-limiting process accompanied with controlled activation of the FGF pathway. In the tumor microenvironment TGF-β increases the secretion of FGFs, further promoting the malignant biological properties of tumors...
March 6, 2017: Oncogene
https://www.readbyqxmd.com/read/28259897/dual-roles-of-protein-tyrosine-phosphatase-kappa-in-coordinating-angiogenesis-induced-by-pro-angiogenic-factors
#10
Ping-Hui Sun, Gang Chen, Malcolm Mason, Wen G Jiang, Lin Ye
A potential role may be played by receptor-type protein tyrosine phosphatase kappa (PTPRK) in angiogenesis due to its critical function in coordinating intracellular signal transduction from various receptors reliant on tyrosine phosphorylation. In the present study, we investigated the involvement of PTPRK in the cellular functions of vascular endothelial cells (HECV) and its role in angiogenesis using in vitro assays and a PTPRK knockdown vascular endothelial cell model. PTPRK knockdown in HECV cells (HECVPTPRKkd) resulted in a decrease of cell proliferation and cell-matrix adhesion; however, increased cell spreading and motility were seen...
February 20, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28259418/nervous-system-disruption-and-swimming-abnormality-in-early-hatched-pufferfish-takifugu-niphobles-larvae-caused-by-pyrene-is-independent-of-aryl-hydrocarbon-receptors
#11
Tatsuya Itoyama, Moe Kawara, Makiko Fukui, Yuki Sugahara, Daisuke Kurokawa, Masahumi Kawaguchi, Shin-Ichi Kitamura, Kei Nakayama, Yasunori Murakami
Pyrene, a member of the polycyclic aromatic hydrocarbons (PAHs), contributes to abnormality in the size of the brain and the swimming behavior of pufferfish (Takifugu niphobles) larvae. We hypothesized that the aryl hydrocarbon receptor (AHR) may mediate pyrene-induced toxic effects because AHR is assumed to be a candidate for the downstream target of PAHs in many cases. To identify the contribution of AHR on developing pufferfish, we performed exposure experiments using β-naphthoflavone, an agonist of AHR...
March 1, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28257817/the-earlier-the-better-impact-of-early-diagnosis-on-clinical-outcome-in-idiopathic-pulmonary-fibrosis
#12
REVIEW
Marina Aiello, Giuseppina Bertorelli, Marialuisa Bocchino, Alfredo Chetta, Alfeo Fiore-Donati, Alessandro Fois, Stefano Marinari, Tiberio Oggionni, Biagio Polla, Elisabetta Rosi, Anna Stanziola, Francesco Varone, Alessandro Sanduzzi
BACKGROUND: Idiopathic pulmonary fibrosis (IPF) is a complex disease with a highly variable clinical course and generally poor prognosis. Classified as a rare disease, significant increases in incidence have been recorded worldwide in recent years. Left untreated IPF is extremely debilitating with substantial personal, social and economic implications. OBJECTIVES: To discuss how IPF is diagnosed and managed in real life clinical practice with particular reference to Italy and to determine how new and effective therapies can be incorporated into a patient-centred management approach in order to improve the lives of patients with IPF...
February 28, 2017: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28249356/regulation-of-skeletal-muscle-stem-cells-by-fibroblast-growth-factors
#13
REVIEW
Bradley Pawlikowski, Thomas Orion Vogler, Katherine Gadek, Bradley Olwin
Fibroblast growth factors are essential for self-renewal of skeletal muscle stem cells (satellite cells), and required for maintenance and repair of skeletal muscle. Satellite cells express high levels of FGF receptor 1 and 4, low levels of FGF receptor 3 and little or no detectable FGF receptor 2. Of the multiple FGFs that influence satellite cell function in culture, FGF2 and FGF6 are the only members that regulate satellite cell function in vivo by activating ERK MAPK, p38α/β MAPKs, PI3 kinase, PLCγ and STATs...
March 1, 2017: Developmental Dynamics: An Official Publication of the American Association of Anatomists
https://www.readbyqxmd.com/read/28249286/impact-of-fibroblast-growth-factors-19-and-21-in-bariatric-metabolism
#14
Ashley Patton, Farooq H Khan, Rohit Kohli
BACKGROUND: Bariatric surgery is a popular and effective therapeutic intervention for obesity, which is an abnormal health condition that is prevalent worldwide. Metabolic improvements that precede weight loss after bariatric surgery may be mediated, in part, through the fibroblast growth factor (FGF) 15/19 and FGF21 signaling pathways. Both FGF15/19 and FGF21 are hormone-like members of the FGF family and exert their metabolic effects in an endocrine manner. Enhanced bile acid recycling after bariatric surgery leads to increased circulating levels of FGF15/19 in the distal small intestine...
2017: Digestive Diseases
https://www.readbyqxmd.com/read/28249259/fibroblast-growth-factor-15-19-in-hepatocarcinogenesis
#15
Gloria Alvarez-Sola, Iker Uriarte, M Ujue Latasa, Raquel Urtasun, Marina Bárcena-Varela, Maria Elizalde, Maddalen Jiménez, Carlos M Rodriguez-Ortigosa, Fernando J Corrales, Maite G Fernández-Barrena, Carmen Berasain, Matías A Avila
BACKGROUND: Advanced hepatocellular carcinoma (HCC) is a neoplastic disease with a very bad prognosis and increasing worldwide incidence. HCCs are resistant to conventional chemotherapy and the multikinase inhibitor sorafenib is the only agent that has shown some clinical efficacy. It is therefore important to identify key molecular mechanisms driving hepatocarcinogenesis for the development of more efficacious therapies. However, HCCs are heterogeneous tumors and different molecular subclasses have been characterized...
2017: Digestive Diseases
https://www.readbyqxmd.com/read/28246458/associations-between-single-nucleotide-polymorphisms-in-multiple-candidate-genes-and-body-weight-in-rabbits
#16
Karim El-Sabrout, Sarah A Aggag
AIM: In this study, we examined parts of six growth genes (growth hormone [GH], melanocortin 4 receptor [MC4R], growth hormone receptor [GHR], phosphorglycerate mutase [PGAM], myostatin [MSTN], and fibroblast growth factor [FGF]) as specific primers for two rabbit lines (V-line, Alexandria) using nucleotide sequence analysis, to investigate association between detecting single nucleotide polymorphism (SNP) of these genes and body weight (BW) at market. MATERIALS AND METHODS: Each line kits were grouped into high and low weight rabbits to identify DNA markers useful for association studies with high BW...
January 2017: Veterinary World
https://www.readbyqxmd.com/read/28237867/exploratory-analysis-of-biomarkers-associated-with-clinical-outcomes-from-the-study-of-lenvatinib-in-differentiated-cancer-of-the-thyroid
#17
Makoto Tahara, Martin Schlumberger, Rossella Elisei, Mouhammed Amir Habra, Naomi Kiyota, Ralf Paschke, Corina E Dutcus, Taro Hihara, Shannon McGrath, Mark Matijevic, Tadashi Kadowaki, Yasuhiro Funahashi, Steven I Sherman
BACKGROUND: Lenvatinib significantly prolonged progression-free survival (PFS) versus placebo in the phase III Study of (E7080) LEnvatinib in differentiated Cancer of the Thyroid (SELECT) of patients with radioiodine-refractory differentiated thyroid cancer. This exploratory analysis investigated potential predictive biomarkers of lenvatinib efficacy and target engagement. PATIENTS AND METHODS: Circulating cytokine/angiogenic factors (CAFs) in blood samples collected at baseline and throughout treatment were analysed from patients randomised to receive lenvatinib or placebo from August 5, 2011 to October 4, 2012...
February 23, 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28220828/rspo3-lgr4-regulates-osteogenic-differentiation-of-human-adipose-derived-stem-cells-via-erk-fgf-signalling
#18
Min Zhang, Ping Zhang, Yunsong Liu, Longwei Lv, Xiao Zhang, Hao Liu, Yongsheng Zhou
The four R-spondins (RSPOs) and their three related receptors, LGR4, 5 and 6, have emerged as a major ligand-receptor system with critical roles in development and stem cell survival. However, the exact roles of the RSPO-LGR system in osteogenesis remain largely unknown. In the present study, we showed that RSPO3-shRNA increased the osteogenic potential of human adipose-derived stem cells (hASCs) significantly. Mechanistically, we demonstrated that RSPO3 is a negative regulator of ERK/FGF signalling. We confirmed that inhibition of the ERK1/2 signalling pathway blocked osteogenic differentiation in hASCs, and the increased osteogenic capacity observed after RSPO3 knockdown in hASCs was reversed by inhibition of ERK signalling...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28212293/targeting-angiogenesis-in-biliary-tract-cancers-an-open-option
#19
REVIEW
Valeria Simone, Oronzo Brunetti, Luigi Lupo, Mario Testini, Eugenio Maiorano, Michele Simone, Vito Longo, Christian Rolfo, Marc Peeters, Aldo Scarpa, Amalia Azzariti, Antonio Russo, Domenico Ribatti, Nicola Silvestris
Biliary tract cancers (BTCs) are characterized by a bad prognosis and the armamentarium of drugs for their treatment is very poor. Although the inflammatory status of biliary tract represents the first step in the cancerogenesis, the microenvironment also plays a key role in the pathogenesis of BTCs, promoting tumor angiogenesis, invasion and metastasis. Several molecules, such as vascular endothelial growth factor (VEGF) and fibroblast growth factor (FGF), are involved in the angiogenesis process and their expression on tumor samples has been explored as prognostic marker in both cholangiocarcinoma and gallbladder cancer...
February 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28211013/electrostatic-forces-as-dominant-interactions-between-proteins-and-polyanions-an-esi-ms-study-of-fibroblast-growth-factor-binding-to-heparin-oligomers
#20
Burcu Baykal Minsky, Paul L Dubin, Igor A Kaltashov
The interactions between fibroblast growth factors (FGFs) and their receptors (FGFRs) are facilitated by heparan sulfate (HS) and heparin (Hp), highly sulfated biological polyelectrolytes. The molecular basis of FGF interactions with these polyelectrolytes is highly complex due to the structural heterogeneity of HS/Hp, and many details still remain elusive, especially the significance of charge density and minimal chain length of HS/Hp in growth factor recognition and multimerization. In this work, we use electrospray ionization mass spectrometry (ESI MS) to investigate the association of relatively homogeneous oligoheparins (octamer, dp8, and decamer, dp10) with acidic fibroblast growth factor (FGF-1)...
February 16, 2017: Journal of the American Society for Mass Spectrometry
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