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https://www.readbyqxmd.com/read/28793778/peroxiredoxin-2-a-novel-regulator-of-iron-homeostasis-in-ineffective-erythropoiesis
#1
Alessandro Matte, Luigia De Falco, Enrica Federti, Anna Cozzi, Achille Iolascon, Sonia Levi, Narla Mohandas, Alberto Zamo, Mariasole Bruno, Christophe Leboeuf, Anne Janin, Angela Siciliano, Thomas Ganz, Giorgia Federico, Francesca Carlomagno, Sebastian Mueller, Ines Silva, Carmine Carbone, Davide Melisi, D W Kim, Soo Young Choi, Lucia DE Franceschi
AIMS: Iron-overload (IO) is a life-threatening complication of chronic hemolytic disorders such as β-thalassemia. IO results in severe cellular oxidative damage, leading to organ failure. Peroxiredoxin-2 (Prx2), a typical 2-cysteine-(Cys)-peroxiredoxin, is an important component of cyto-protective system, but its response to IO is still to be fully defined. RESULTS: We studied the effects of IO on Prx2-knockout mice (Prx2-/-). The absence of Prx2 enhanced toxicity due to IO on erythropoiesis...
August 10, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28780227/insights-into-the-immune-manipulation-mechanisms-of-pollen-allergens-by-protein-domain-profiling
#2
Seema Patel, Aruna Rani, Arun Goyal
Plant pollens are airborne allergens, as their inhalation causes immune activation, leading to rhinitis, conjunctivitis, sinusitis and oral allergy syndrome. A myriad of pollen proteins belonging to profilin, expansin, polygalacturonase, glucan endoglucosidase, pectin esterase, and lipid transfer protein class have been identified. In the present in silico study, the protein domains of fifteen pollen sequences were extracted from the UniProt database and submitted to the interactive web tool SMART (Simple Modular Architecture Research Tool), for finding the protein domain profiles...
July 29, 2017: Computational Biology and Chemistry
https://www.readbyqxmd.com/read/28768181/long-term-cold-adaptation-does-not-require-fgf21-or-ucp1
#3
Susanne Keipert, Maria Kutschke, Mario Ost, Thomas Schwarzmayr, Evert M van Schothorst, Daniel Lamp, Laura Brachthäuser, Isabel Hamp, Sithandiwe E Mazibuko, Sonja Hartwig, Stefan Lehr, Elisabeth Graf, Oliver Plettenburg, Frauke Neff, Matthias H Tschöp, Martin Jastroch
Brown adipose tissue (BAT)-dependent thermogenesis and its suggested augmenting hormone, FGF21, are potential therapeutic targets in current obesity and diabetes research. Here, we studied the role of UCP1 and FGF21 for metabolic homeostasis in the cold and dissected underlying molecular mechanisms using UCP1-FGF21 double-knockout mice. We report that neither UCP1 nor FGF21, nor even compensatory increases of FGF21 serum levels in UCP1 knockout mice, are required for defense of body temperature or for maintenance of energy metabolism and body weight...
August 1, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28741998/retention-of-virulence-following-colistin-adaptation-in-klebsiella-pneumoniae-is-strain-dependent-rather-than-associated-with-specific-mutations
#4
Matthew E Wand, Lucy J Bock, J Mark Sutton
This study aimed to understand the impact on virulence and fitness of mutations in specific genes found after adaptation of Klebsiella pneumoniae to colistin. Isolates with an increase in their inhibitory concentration (MIC) to colistin of 32- to >128-fold were shown to have mutations in mgrB, phoPQ and pmrAB, all known regulators of pathways affecting membrane lipid content. When these strains were used in studies in Galleria mellonella there was no clear correlation between mutations in specific genes per se and loss of virulence...
July 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28735778/yoga-for-military-veterans-with-chronic-low-back-pain-a-randomized-clinical-trial
#5
Erik J Groessl, Lin Liu, Douglas G Chang, Julie L Wetherell, Jill E Bormann, J Hamp Atkinson, Sunita Baxi, Laura Schmalzl
INTRODUCTION: Chronic low back pain (cLBP) is prevalent, especially among military veterans. Many cLBP treatment options have limited benefits and are accompanied by side effects. Major efforts to reduce opioid use and embrace nonpharmacological pain treatments have resulted. Research with community cLBP patients indicates that yoga can improve health outcomes and has few side effects. The benefits of yoga among military veterans were examined. DESIGN: Participants were randomized to either yoga or delayed yoga treatment in 2013-2015...
July 17, 2017: American Journal of Preventive Medicine
https://www.readbyqxmd.com/read/28714907/genetic-contribution-to-alcohol-dependence-investigation-of-a-heterogeneous-german-sample-of-individuals-with-alcohol-dependence-chronic-alcoholic-pancreatitis-and-alcohol-related-cirrhosis
#6
Jens Treutlein, Josef Frank, Fabian Streit, Céline S Reinbold, Dilafruz Juraeva, Franziska Degenhardt, Liz Rietschel, Stephanie H Witt, Andreas J Forstner, Monika Ridinger, Jana Strohmaier, Norbert Wodarz, Helene Dukal, Jerome C Foo, Per Hoffmann, Stefan Herms, Stefanie Heilmann-Heimbach, Michael Soyka, Wolfgang Maier, Wolfgang Gaebel, Norbert Dahmen, Norbert Scherbaum, Bertram Müller-Myhsok, Susanne Lucae, Marcus Ising, Felix Stickel, Thomas Berg, Ulla Roggenbuck, Karl-Heinz Jöckel, Henrike Scholz, Ulrich S Zimmermann, Stephan Buch, Wolfgang H Sommer, Rainer Spanagel, Benedikt Brors, Sven Cichon, Karl Mann, Falk Kiefer, Jochen Hampe, Jonas Rosendahl, Markus M Nöthen, Marcella Rietschel
The present study investigated the genetic contribution to alcohol dependence (AD) using genome-wide association data from three German samples. These comprised patients with: (i) AD; (ii) chronic alcoholic pancreatitis (ACP); and (iii) alcohol-related liver cirrhosis (ALC). Single marker, gene-based, and pathway analyses were conducted. A significant association was detected for the ADH1B locus in a gene-based approach (puncorrected = 1.2 × 10(-6); pcorrected = 0.020). This was driven by the AD subsample...
July 17, 2017: Genes
https://www.readbyqxmd.com/read/28709862/1st-european-congress-of-medical-physics-september-1-4-2016-medical-physics-innovation-and-vision-within-europe-and-beyond
#7
EDITORIAL
Virginia Tsapaki, George C Kagadis, Marco Brambilla, Mario Ciocca, Catharine H Clark, Harry Delis, Giovanni Mettivier
Medical Physics is the scientific healthcare profession concerned with the application of the concepts and methods of physics in medicine. The European Federation of Organisations for Medical Physics (EFOMP) acts as the umbrella organization for European Medical Physics societies. Due to the rapid advancements in related scientific fields, medical physicists must have continuous education through workshops, training courses, conferences, and congresses during their professional life. The latest developments related to this increasingly significant medical speciality were presented during the 1st European Congress of Medical Physics 2016, held in Athens, September 1-4, 2016, organized by EFOMP, hosted by the Hellenic Association of Medical Physicists (HAMP), and summarized in the current volume...
July 11, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28689299/4-o-methylhonokiol-protects-from-alcohol-carbon-tetrachloride-induced-liver-injury-in-mice
#8
Eleonora Patsenker, Andrea Chicca, Vanessa Petrucci, Sheida Moghadamrad, Andrea de Gottardi, Jochen Hampe, Jürg Gertsch, Nasser Semmo, Felix Stickel
Alcoholic liver disease (ALD) is a leading cause of liver cirrhosis, liver cancer, and related mortality. The endocannabinoid system contributes to the development of chronic liver diseases, where cannabinoid receptor 2 (CB2) has been shown to have a protecting role. Thus, here, we investigated how CB2 agonism by 4'-O-methylhonokiol (MHK), a biphenyl from Magnolia grandiflora, affects chronic alcohol-induced liver fibrosis and damage in mice. A combination of alcohol (10% vol/vol) and CCl4 (1 ml/kg) was applied to C57BL/6 mice for 5 weeks...
July 8, 2017: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/28678075/patients-undergoing-orthotopic-liver-transplantation-require-lower-concentrations-of-the-volatile-anesthetic-sevoflurane
#9
Joanna Baron-Stefaniak, Viola Götz, Andreas Allhutter, Judith Schiefer, Thomas Hamp, Peter Faybik, Gabriela Berlakovich, David M Baron, Walter Plöchl
BACKGROUND: Sevoflurane is a volatile anesthetic commonly used to maintain anesthesia in patients with end-stage liver disease (ESLD) undergoing orthotopic liver transplantation (OLT). Growing evidence suggests that patients with ESLD have decreased anesthetic requirements compared to patients with preserved liver function. The potency of volatile anesthetics is expressed as the minimum alveolar concentration (MAC). In this prospective, blinded study, we compared the MAC of sevoflurane among patients with ESLD undergoing OLT and patients with normal liver function undergoing major abdominal surgery...
July 1, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28673786/diurnal-variations-in-iron-concentrations-and-expression-of-genes-involved-in-iron-absorption-and-metabolism-in-pigs
#10
Yiming Zhang, Dan Wan, Xihong Zhou, Ciming Long, Xin Wu, Lan Li, Liuqin He, Pan Huang, Shuai Chen, Bie Tan, Yulong Yin
Diurnal variations in serum iron levels have been well documented in clinical studies, and serum iron is an important diagnostic index for iron-deficiency anemia. However, the underlying mechanism of dynamic iron regulation in response to the circadian rhythm is still unclear. In this study, we investigated daily variations in iron status in the plasma and liver of pigs. The transcripts encoding key factors involved in iron uptake and homeostasis were evaluated. The results showed that iron levels in the plasma and liver exhibited diurnal rhythms...
July 1, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28649438/translational-learning-from-clinical-studies-predicts-drug-pharmacokinetics-across-patient-populations
#11
Markus Krauss, Ute Hofmann, Clemens Schafmayer, Svitlana Igel, Jan Schlender, Christian Mueller, Mario Brosch, Witigo von Schoenfels, Wiebke Erhart, Andreas Schuppert, Michael Block, Elke Schaeffeler, Gabriele Boehmer, Linus Goerlitz, Jan Hoecker, Joerg Lippert, Reinhold Kerb, Jochen Hampe, Lars Kuepfer, Matthias Schwab
Early indication of late-stage failure of novel candidate drugs could be facilitated by continuous integration, assessment, and transfer of knowledge acquired along pharmaceutical development programs. We here present a translational systems pharmacology workflow that combines drug cocktail probing in a specifically designed clinical study, physiologically based pharmacokinetic modeling, and Bayesian statistics to identify and transfer (patho-)physiological and drug-specific knowledge across distinct patient populations...
2017: NPJ Systems Biology and Applications
https://www.readbyqxmd.com/read/28648331/il-35-as-a-newly-proposed-homeostasis-associated-molecular-pattern-plays-three-major-functions-including-anti-inflammatory-initiator-effector-and-blocker-in-cardiovascular-diseases
#12
Xinyuan Li, Pu Fang, William Y Yang, Hong Wang, Xiaofeng Yang
IL-35 is a new anti-inflammatory cytokine identified in 2007, which inhibits inflammation and immune responses by inducing regulatory T cells and regulatory B cells and suppressing effector T cells and macrophages. The unique initiator and effector anti-inflammatory properties of IL-35 bring tremendous interest in investigating its role during cardiovascular disease (CVD) development, in which inflammatory processes are firmly established as central to its development and complications. In this review, we update recent understanding of how IL-35 is produced and regulated in the cells...
June 22, 2017: Cytokine
https://www.readbyqxmd.com/read/28584864/student-selection-cannot-resolve-the-lack-of-general-practitioners-and-country-doctors
#13
Johanna Hissbach, Stefan Zimmermann, Wolfgang Hampe
No abstract text is available yet for this article.
2017: GMS Journal for Medical Education
https://www.readbyqxmd.com/read/28584863/reply-to-the-letter-to-the-editor-by-j-hissbach-s-zimmermann-w-hampe
#14
Iris Kesternich, Heiner Schumacher, Joachim Winter, Martin R Fischer, Matthias Holzer
No abstract text is available yet for this article.
2017: GMS Journal for Medical Education
https://www.readbyqxmd.com/read/28550187/dynamics-of-epigenetic-age-following-hematopoietic-stem-cell-transplantation
#15
LETTER
Friedrich Stölzel, Mario Brosch, Steve Horvath, Michael Kramer, Christian Thiede, Malte von Bonin, Ole Ammerpohl, Moritz Middeke, Johannes Schetelig, Gerhard Ehninger, Jochen Hampe, Martin Bornhäuser
No abstract text is available yet for this article.
August 2017: Haematologica
https://www.readbyqxmd.com/read/28549569/trpm-channels-as-potential-therapeutic-targets-against-pro-inflammatory-diseases
#16
REVIEW
Susanna Zierler, Sarah Hampe, Wiebke Nadolni
The immune system protects our body against foreign pathogens. However, if it overshoots or turns against itself, pro-inflammatory diseases, such as rheumatoid arthritis, inflammatory bowel disease, or diabetes develop. Ions, the most basic signaling molecules, shape intracellular signaling cascades resulting in immune cell activation and subsequent immune responses. Mutations in ion channels required for calcium signaling result in human immunodeficiencies and highlight those ion channels as valued targets for therapies against pro-inflammatory diseases...
May 3, 2017: Cell Calcium
https://www.readbyqxmd.com/read/28538210/correlation-of-hamp-gene-polymorphisms-and-expression-with-the-susceptibility-and-length-of-hospital-stays-in-taiwanese-children-with-kawasaki-disease
#17
Ying-Hsien Huang, Kuender D Yang, Yu-Wen Hsu, Hsing-Fang Lu, Henry Sung-Ching Wong, Hong-Ren Yu, Hsing-Chun Kuo, Fu-Chen Huang, Mao-Hung Lo, Kai-Sheng Hsieh, Su-Fen Chen, Wei-Chiao Chang, Ho-Chang Kuo
Kawasaki disease (KD) is a form of systemic vasculitis. Regarding its pathogenesis, HAMP gene encoding hepcidin, which is significant for iron metabolism, has a vital function. In this study, we recruited a total of 381 KD patients for genotyping. Data from 997 subjects (500 subjects from cohort 1; 497 subjects from cohort 2) were used for analysis. Using TaqMan allelic discrimination, we determined five tag SNPs (rs916145, rs10421768, rs3817623, rs7251432, and rs2293689). Treatment outcome data related to such clinical phenotypes as coronary artery lesions (CAL), coronary artery aneurysms (CAA), and intravenous immunoglobulin (IVIG) effects were also collected...
May 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28530443/association-of-single-nucleotide-polymorphism-in-the-hepcidin-promoter-gene-with-susceptibility-to-extrapulmonary-tuberculosis
#18
Li Liang, Huijuan Liu, Jun Yue, Li-Rong Liu, Min Han, Liu-Lin Luo, Yan-Lin Zhao, Heping Xiao
BACKGROUND: Hepcidin is a 25-amino acid peptide produced by the liver in response to inflammation and iron overload. It is encoded by the hepcidin antimicrobial peptide (HAMP) gene and plays a key role in innate immunity. Previous studies have reported that a -582 A>G polymorphism in the HAMP promoter (HAMP-P) affects hepcidin expression, causing susceptibility to various bacterial and viral pathogens. However, it is not known whether the HAMP-P -582 A>G polymorphism is associated with tuberculosis (TB) susceptibility...
June 2017: Genetic Testing and Molecular Biomarkers
https://www.readbyqxmd.com/read/28527583/molecular-characterization-of-aspergillus-fumigatus-tcsc-a-characteristic-type-iii-hybrid-histidine-kinase-of-filamentous-fungi-harboring-six-hamp-domains
#19
Anja Spadinger, Frank Ebel
The type III hybrid histidine kinase (HHK) TcsC enables the pathogenic mold Aspergillus fumigatus to thrive under hyperosmotic conditions. It is, moreover, of particular interest, since it is the target of certain antifungal agents, such as fludioxonil. This study was aimed at a functional characterization of the domains that constitute the sensing and the kinase module of TcsC. The sensing module consists of six HAMP domains, an architecture that is commonly found in type III HHKs of filamentous fungi. To dissect the functional role of the individual domains, we have analyzed a set of truncated derivatives of TcsC with respect to their impact on fungal growth and their ability to respond to hyperosmotic stress and fludioxonil...
June 2017: International Journal of Medical Microbiology: IJMM
https://www.readbyqxmd.com/read/28522691/mechanism-of-transmembrane-signaling-by-sensor-histidine-kinases
#20
Ivan Gushchin, Igor Melnikov, Vitaly Polovinkin, Andrii Ishchenko, Anastasia Yuzhakova, Pavel Buslaev, Gleb Bourenkov, Sergei Grudinin, Ekaterina Round, Taras Balandin, Valentin Borshchevskiy, Dieter Willbold, Gordon Leonard, Georg Büldt, Alexander Popov, Valentin Gordeliy
One of the major and essential classes of transmembrane (TM) receptors, present in all domains of life, is sensor histidine kinases (HKs), parts of two-component signaling systems (TCS). The structural mechanisms of transmembrane signaling by these sensors are poorly understood. We present here crystal structures of the periplasmic sensor domain, the TM domain and the cytoplasmic HAMP domain of the Escherichia coli nitrate/nitrite sensor HK NarQ in the ligand-bound and mutated ligand-free states. The structures reveal that the ligand binding induces significant rearrangements and piston-like shifts of TM helices...
May 18, 2017: Science
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