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Gunter Schumann, Chunyu Liu, Paul O'Reilly, He Gao, Parkyong Song, Bing Xu, Barbara Ruggeri, Najaf Amin, Tianye Jia, Sarah Preis, Marcelo Segura Lepe, Shizuo Akira, Caterina Barbieri, Sebastian Baumeister, Stephane Cauchi, Toni-Kim Clarke, Stefan Enroth, Krista Fischer, Jenni Hällfors, Sarah E Harris, Saskia Hieber, Edith Hofer, Jouke-Jan Hottenga, Åsa Johansson, Peter K Joshi, Niina Kaartinen, Jaana Laitinen, Rozenn Lemaitre, Anu Loukola, Jian'an Luan, Leo-Pekka Lyytikäinen, Massimo Mangino, Ani Manichaikul, Hamdi Mbarek, Yuri Milaneschi, Alireza Moayyeri, Kenneth Mukamal, Christopher Nelson, Jennifer Nettleton, Eemil Partinen, Rajesh Rawal, Antonietta Robino, Lynda Rose, Cinzia Sala, Takashi Satoh, Reinhold Schmidt, Katharina Schraut, Robert Scott, Albert Vernon Smith, John M Starr, Alexander Teumer, Stella Trompet, André G Uitterlinden, Cristina Venturini, Anne-Claire Vergnaud, Niek Verweij, Veronique Vitart, Dragana Vuckovic, Juho Wedenoja, Loic Yengo, Bing Yu, Weihua Zhang, Jing Hua Zhao, Dorret I Boomsma, John Chambers, Daniel I Chasman, Toniolo Daniela, Eco de Geus, Ian Deary, Johan G Eriksson, Tõnu Esko, Volker Eulenburg, Oscar H Franco, Philippe Froguel, Christian Gieger, Hans J Grabe, Vilmundur Gudnason, Ulf Gyllensten, Tamara B Harris, Anna-Liisa Hartikainen, Andrew C Heath, Lynne Hocking, Albert Hofman, Cornelia Huth, Marjo-Riitta Jarvelin, J Wouter Jukema, Jaakko Kaprio, Jaspal S Kooner, Zoltan Kutalik, Jari Lahti, Claudia Langenberg, Terho Lehtimäki, Yongmei Liu, Pamela A F Madden, Nicholas Martin, Alanna Morrison, Brenda Penninx, Nicola Pirastu, Bruce Psaty, Olli Raitakari, Paul Ridker, Richard Rose, Jerome I Rotter, Nilesh J Samani, Helena Schmidt, Tim D Spector, David Stott, David Strachan, Ioanna Tzoulaki, Pim van der Harst, Cornelia M van Duijn, Pedro Marques-Vidal, Peter Vollenweider, Nicholas J Wareham, John B Whitfield, James Wilson, Bruce Wolffenbuttel, Georgy Bakalkin, Evangelos Evangelou, Yun Liu, Kenneth M Rice, Sylvane Desrivières, Steven A Kliewer, David J Mangelsdorf, Christian P Müller, Daniel Levy, Paul Elliott
Excessive alcohol consumption is a major public health problem worldwide. Although drinking habits are known to be inherited, few genes have been identified that are robustly linked to alcohol drinking. We conducted a genome-wide association metaanalysis and replication study among >105,000 individuals of European ancestry and identified β-Klotho (KLB) as a locus associated with alcohol consumption (rs11940694; P = 9.2 × 10(-12)). β-Klotho is an obligate coreceptor for the hormone FGF21, which is secreted from the liver and implicated in macronutrient preference in humans...
December 13, 2016: Proceedings of the National Academy of Sciences of the United States of America
A Kharitonenkov, R DiMarchi
Fibroblast growth factor (FGF) 21 belongs to a hormone-like subgroup within the FGF superfamily. The members of this subfamily, FGF19, FGF21 and FGF23, are characterized by their reduced binding affinity for heparin that enables them to be transported in the circulation and function in an endocrine manner. It is likely that FGF21 also acts in an autocrine and paracrine fashion, as multiple organs can produce this protein and its plasma concentration seems to be below the level necessary to induce a pharmacological effect...
November 22, 2016: Journal of Internal Medicine
Kotaro Sakamoto, Yayoi Kawata, Yasushi Masuda, Tadashi Umemoto, Takashi Ito, Taiji Asami, Shiro Takekawa, Tetsuya Ohtaki, Hiroshi Inooka
Fibroblast growth factor receptor-1c (FGFR1c)/βKlotho (KLB) complex is a receptor of fibroblast growth factor 21 (FGF21). Pharmacologically, FGF21 shows anti-obesity and anti-diabetic effects upon peripheral administration. Here, we report the development of an artificial peptide agonist to the FGFR1c/KLB heterodimer complex. The peptide, F91-8A07 (LPGRTCREYPDLWWVRCY), was discovered from random peptide T7 phage display and selectively bound to the FGFR1c/KLB complex, but not to FGFR1c and KLB individually...
October 4, 2016: Biochemical and Biophysical Research Communications
Nicole E Brooks, Rikke Hjortebjerg, Brooke E Henry, Edward O List, John J Kopchick, Darlene E Berryman
OBJECTIVE: Although growth hormone (GH) and fibroblast growth factor 21 (FGF21) have a reported relationship, FGF21 and its receptor, fibroblast growth factor receptor 1 (FGFR1) and cofactor β-Klotho (KLB), have not been analyzed in chronic states of altered GH action. The objective of this study was to quantify circulating FGF21 and tissue specific expression of Fgf21, Fgfr1, and Klb in mice with modified GH action. Based on previous studies, we hypothesized that bovine GH transgenic (bGH) mice will be FGF21 resistant and GH receptor knockout (GHR-/-) mice will have normal FGF21 action...
October 2016: Growth Hormone & IGF Research
Albert Pérez-Martí, Viviana Sandoval, Pedro F Marrero, Diego Haro, Joana Relat
Obesity is a worldwide health problem mainly due to its associated comorbidities. Fibroblast growth factor 21 (FGF21) is a peptide hormone involved in metabolic homeostasis in healthy individuals and considered a promising therapeutic candidate for the treatment of obesity. FGF21 is predominantly produced by the liver but also by other tissues, such as white adipose tissue (WAT), brown adipose tissue (BAT), skeletal muscle, and pancreas in response to different stimuli such as cold and different nutritional challenges that include fasting, high-fat diets (HFDs), ketogenic diets, some amino acid-deficient diets, low protein diets, high carbohydrate diets or specific dietary bioactive compounds...
September 1, 2016: Hormone Molecular Biology and Clinical Investigation
Firouzeh Manouchehri, Yahya Izadmanesh, Elham Aghaee, Jahan B Ghasemi
The interaction of pyridoxine (Vitamin B6) with bovine serum albumin (BSA) is investigated under pseudo-physiological conditions by UV-Vis, fluorescence and FTIR spectroscopy. The intrinsic fluorescence of BSA was quenched by VB6, which was rationalized in terms of the static quenching mechanism. According to fluorescence quenching calculations, the bimolecular quenching constant (kq), dynamic quenching (KSV) and static quenching (KLB) at 310K were obtained. The efficiency of energy transfer and the distance between the donor (BSA) and the acceptor (VB6) were calculated by Foster's non-radiative energy transfer theory and were equal to 41...
October 2016: Bioorganic Chemistry
Fenni Rusli, Joris Deelen, Evi Andriyani, Mark V Boekschoten, Carolien Lute, Erik B van den Akker, Michael Müller, Marian Beekman, Wilma T Steegenga
Fibroblast growth factor 21 (Fgf21) has emerged as a potential plasma marker to diagnose non-alcoholic fatty liver disease (NAFLD). To study the molecular processes underlying the association of plasma Fgf21 with NAFLD, we explored the liver transcriptome data of a mild NAFLD model of aging C57BL/6J mice at 12, 24, and 28 months of age. The plasma Fgf21 level significantly correlated with intrahepatic triglyceride content. At the molecular level, elevated plasma Fgf21 levels were associated with dysregulated metabolic and cancer-related pathways...
2016: Scientific Reports
Jian-Li He, Miao Zhao, Jing-Jun Xia, Jian Guan, Yang Liu, Lu-Qi Wang, Dong-Xue Song, Mei-Yu Qu, Meng Zuo, Xin Wen, Xue Yu, Rong Huo, Zhen-Wei Pan, Tao Ban, Yan Zhang, Jiu-Xin Zhu, Weinian Shou, Guo-Fen Qiao, Bai-Yan Li
Fibroblast growth factor-21 (FGF21) is closely related to various metabolic and cardiovascular disorders. However, the direct targets and mechanisms linking FGF21 to blood pressure control and hypertension are still elusive. Here we demonstrated a novel regulatory function of FGF21 in the baroreflex afferent pathway (the nucleus tractus solitarii, NTS; nodose ganglion, NG). As the critical co-receptor of FGF21, β-klotho (klb) significantly expressed on the NTS and NG. Furthermore, we evaluated the beneficial effects of chronic intraperitoneal infusion of recombinant human FGF21 (rhFGF21) on the dysregulated systolic blood pressure, cardiac parameters, baroreflex sensitivity (BRS) and hyperinsulinemia in the high fructose-drinking (HFD) rats...
July 8, 2016: Scientific Reports
D M Kilkenny, J V Rocheleau
Scientific evidence is quickly growing that establishes FGF21 as a cytokine that signals both locally and systemically to induce metabolic effects. The focus of this chapter is the receptor/co-receptor signaling complex formed by endocrine FGF21. We provide an introduction to the major components of the complex including the Klotho family of co-receptors, fibroblast growth factor receptors (FGFRs), and the fibroblast growth factor ligands, placing each in the context of its own family members while emphasizing structural features that drive interaction...
2016: Vitamins and Hormones
Michael Camilleri
It was previously demonstrated that patients with bile acid (BA) diarrhea have low fasting serum levels of the ileal hormone--fibroblast growth factor-19 (FGF-19). In this paper, the authors demonstrate a positive correlation between ileal transcripts of FGF-19 and (75)SeHCAT retention, providing further evidence of FGF-19 deficiency as an explanation for BA diarrhea. Variants in KLB and FGFR4 genes (that determine the functional re-uptake of BA in the portal circulation by hepatocytes) are also demonstrated to be associated with (75)SeHCAT retention, confirming a second potential mechanism for the development of BA diarrhea...
March 2016: American Journal of Gastroenterology
Jennifer Jager, Fenfen Wang, Bin Fang, Hee-Woong Lim, Lindsey C Peed, David J Steger, Kyoung-Jae Won, Alexei Kharitonenkov, Andrew C Adams, Mitchell A Lazar
FGF21 is an atypical member of the FGF family that functions as a hormone to regulate carbohydrate and lipid metabolism. Here we demonstrate that the actions of FGF21 in mouse adipose tissue, but not in liver, are modulated by the nuclear receptor Rev-erbα, a potent transcriptional repressor. Interrogation of genes induced in the absence of Rev-erbα for Rev-erbα-binding sites identified βKlotho, an essential coreceptor for FGF21, as a direct target gene of Rev-erbα in white adipose tissue but not liver...
May 13, 2016: Journal of Biological Chemistry
Haizhao Song, Zihuan Zheng, Jianan Wu, Jia Lai, Qiang Chu, Xiaodong Zheng
Insulin resistance and hepatic steatosis are the most common complications of obesity. Pitaya is an important source of phytochemicals such as polyphenols, flavonoid and vitamin C which are related to its antioxidant activity. The present study was conducted to evaluate the influence of white pitaya juice (WPJ) on obesity-related metabolic disorders (e.g. insulin resistance and hepatic steatosis) in high-fat diet-fed mice. Forty-eight male C57BL/6J mice were assigned into four groups and fed low-fat diet with free access to water or WPJ, or fed high-fat diet with free access to water or WPJ for 14 weeks...
2016: PloS One
Ricardo J Samms, Christine C Cheng, Alexei Kharitonenkov, Ruth E Gimeno, Andrew C Adams
The endocrine hormone fibroblast growth factor 21 (FGF21) is induced in the adaptive response to nutrient deprivation, where it serves to regulate the integrated response to fasting via its primary receptor complex, FGF receptor 1 coupled with the cofactor β-klotho (KLB) in target tissues. Curiously, endogenous FGF21 levels are also elevated in preclinical models of obesity and in obese/diabetic individuals. In addition to higher FGF21 levels, reduced KLB expression in liver and adipose tissue has been noted in these same individuals, suggesting that obesity may represent an FGF21 resistant state...
April 2016: Endocrinology
Ian M Johnston, Jonathan D Nolan, Sanjeev S Pattni, Richard N Appleby, Justine H Zhang, Sarah L Kennie, Gaganjit K Madhan, Sina Jameie-Oskooei, Shivani Pathmasrirengam, Jeremy Lin, Albert Hong, Peter H Dixon, Catherine Williamson, Julian R F Walters
OBJECTIVES: Chronic diarrhea caused by primary bile acid diarrhea (PBAD) is a common condition. We have previously shown PBAD is associated with low fasting serum levels of the ileal hormone, fibroblast growth factor 19 (FGF19). FGF19 is a negative regulator of hepatic bile acid synthesis and is stimulated by farnesoid X receptor agonists, which produce symptomatic improvement in PBAD. We aimed to assess possible causes for low serum FGF19 in patients with PBAD. METHODS: Patients with PBAD, defined by reduced (75)Se-labelled homocholic acid taurine (SeHCAT) retention, and idiopathic diarrhea controls had measurements of fasting lipids and fasting/post-prandial FGF19 serum profiles...
March 2016: American Journal of Gastroenterology
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