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https://www.readbyqxmd.com/read/29329501/sustained-plasma-hepcidin-suppression-and-iron-elevation-by-anticalin-derived-hepcidin-antagonist-in-cynomolgus-monkey
#1
Andreas M Hohlbaum, Hendrik Gille, Stefan Trentmann, Maria Kolodziejczyk, Barbara Rattenstetter, Coby M Laarakkers, Galina Katzmann, Hans Jürgen Christian, Nicole Andersen, Andrea Allersdorfer, Shane A Olwill, Bernd Meibohm, Laurent P Audoly, Dorine W Swinkels, Rachel P L van Swelm
BACKGROUND AND PURPOSE: Anaemia of chronic disease (ACD) has been linked to iron restricted erythropoiesis imposed by high circulating levels of hepcidin, a 25 amino acid hepatocyte-derived peptide that controls systemic iron homeostasis. Here we report the engineering of the human lipocalin-derived, small protein-based Anticalin PRS-080 hepcidin antagonist with high affinity and selectivity. EXPERIMENTAL APPROACH: Anticalin- and hepcidin-specific pharmacokinetic/pharmacodynamic modelling was used to design and select the suitable drug candidate based on half life extension and duration of hepcidin suppression...
January 12, 2018: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29329289/burkholderia-pseudomallei-modulates-host-iron-homeostasis-to-facilitate-iron-availability-and-intracellular-survival
#2
Imke H E Schmidt, Claudia Gildhorn, Martha A L Böning, Vera A Kulow, Ivo Steinmetz, Antje Bast
BACKGROUND: The control over iron homeostasis is critical in host-pathogen-interaction. Iron plays not only multiple roles for bacterial growth and pathogenicity, but also for modulation of innate immune responses. Hepcidin is a key regulator of host iron metabolism triggering degradation of the iron exporter ferroportin. Although iron overload in humans is known to increase susceptibility to Burkholderia pseudomallei, it is unclear how the pathogen competes with the host for the metal during infection...
January 12, 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29325711/effects-of-cortisol-and-lipopolysaccharide-on-expression-of-select-growth-stress-and-immune-related-genes-in-rainbow-trout-liver
#3
Brian S Shepherd, Allyn R Spear, Anju M Philip, Douglas W Leaman, Carol A Stepien, Osvaldo J Sepulveda-Villet, Debra E Palmquist, Mathilakath M Vijayan
Many studies have shown that stress-induced cortisol levels negatively influence growth and immunity in finfish. Despite this knowledge, few studies have assessed the direct effects of cortisol on liver immune function in finfish. Using real-time PCR, the expression of three cortisol-responsive genes (GR: glucocorticoid receptor, IGF-1: insulin-like growth factor-I and SOCS-1: suppressor of cytokine signaling-I), genes involved with innate and adaptive immunity (IL-1β: interleukin-1 beta, IgM: immunoglobin-M and Lyz: lysozyme), and liver-specific antimicrobial peptides (hepcidin and LEAP-2A: liver-expressed antimicrobial peptide-2A) were studied in vitro using rainbow trout liver slices...
January 8, 2018: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29325459/is-cord-blood-hepcidin-influenced-by-the-low-grade-acute-phase-response-occurring-during-delivery-%C3%A2-a-small-scale-longitudinal-study
#4
Michael Hoppe, Lena Hulthén, Gösta Samuelson
AIM: To measure serum hepcidin in late pregnancy and in cord blood, and to analyze relationship between hepcidin, interleukin-6 and biomarkers of fetal iron status. MATERIALS AND METHODS: Data from 15 uncomplicated singleton pregnancies were analyzed longitudinally in trimester 3 (T3) and at birth. RESULTS: In T3, S-ferritin (median 14 µg/L) and transferrin (median 4.0 g/L) indicated low iron status, whereas the median soluble transferrin receptor (sTfR) was 4...
January 11, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29324800/hepcidin-deficiency-and-iron-deficiency-do-not-alter-tuberculosis-susceptibility-in-a-murine-m-tb-infection-model
#5
Rachel Harrington-Kandt, Elena Stylianou, Lucy A Eddowes, Pei Jin Lim, Lisa Stockdale, Nawamin Pinpathomrat, Naomi Bull, Janet Pasricha, Marta Ulaszewska, Yulia Beglov, Sophie Vaulont, Hal Drakesmith, Helen McShane
Tuberculosis (TB), caused by the macrophage-tropic pathogen Mycobacterium tuberculosis (M.tb) is a highly prevalent infectious disease. Since an immune correlate of protection or effective vaccine have yet to be found, continued research into host-pathogen interactions is important. Previous literature reports links between host iron status and disease outcome for many infections, including TB. For some extracellular bacteria, the iron regulatory hormone hepcidin is essential for protection against infection...
2018: PloS One
https://www.readbyqxmd.com/read/29318945/relationship-between-obesity-and-iron-deficiency-anemia-is-there-a-role-of-hepcidin
#6
Ertan Sal, Idil Yenicesu, Nurullah Celik, Hatice Pasaoglu, Bulent Celik, Ozge Tugce Pasaoglu, Zühre Kaya, Ulker Kocak, Orhun Camurdan, Aysun Bideci, Peyami Cinaz
OBJECTIVES: Iron deficiency is common in obese children although the underlying mechanism is unclear. The aim of this study was to investigate the associations between iron parameters, leptin, hepcidin and adiponectin levels in obese children. METHODS: A total of 237 children, ranging in age from 5 to 18 years, 180 with primary obesity and 57 healthy children and adolescents, were enrolled. Complete blood count, serum iron levels, iron-binding capacity, ferritin levels, leptin, hepcidin and adiponectin levels were studied...
January 10, 2018: Hematology (Amsterdam, Netherlands)
https://www.readbyqxmd.com/read/29312624/associations-of-plasma-hepcidin-with-mortality-risk-in-patients-with-coronary-artery-disease
#7
Xinrui Li, Ding Ding, Yuan Zhang, Dongfang Su, Min Wang, Xuechen Chen, Yan Yang, Changjiang Hong, Gang Hu, Wenhua Ling
Background: Increased blood hepcidin may be associated with the presence and promotion of atherosclerosis, the association of hepcidin with mortality among coronary artery disease (CAD) patients remains unknown. We sought to assess the relationship of hepcidin and all-cause and cardiovascular disease (CVD) mortality among CAD patients with and without acute coronary syndrome (ACS). Methods and Results: This study included 759 patients with ACS and 526 patients with stable CAD...
December 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/29306260/interleukin-6-and-hepcidin-expression-changes-in-cardiac-tissue-of-long-term-trained-and-untrained-rats-after-exhaustive-exercise
#8
Badegül Sarıkaya, Ali Doğan Dursun, Elçin Yağmur Taylan Deveden, Lamia Pınar
Background/aim: Exercise benefits the cardiovascular system, but strenuous exercise can cause cardiac damage and induce cytokine production, particularly that of interleukin-6 (IL-6). Hepcidin, which is primarily regulated by IL-6, increases after exercise. Hepcidin is a possible protective factor against the adverse effects of strenuous exercise such as oxidative stress. The aim of the study is to reveal that training increases hepcidin and attenuates increased levels of IL-6 in the hearts of exhaustively exercised rats by comparing the IL-6 and hepcidin mRNA expression levels in trained and untrained groups...
December 19, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/29305826/hepcidin-soluble-transferrin-receptor-and-il-6-levels-in-obese-children-and-adolescents-with-and-without-type-2-diabetes-mellitus-impaired-glucose-tolerance-and-their-association-with-obstructive-sleep-apnea
#9
S Shalitin, V Deutsch, R Tauman
PURPOSE: Obesity, type 2 diabetes mellitus (T2DM), and obstructive sleep apnea (OSA) are associated with chronic low-grade inflammation. Iron metabolism is linked with insulin-resistant states and with OSA in adults. The association of body iron status with T2DM in children remains undefined. We aimed to evaluate plasma interleukin-6 (IL-6), hepcidin, and soluble transferrin receptor (sTfR) levels in obese patients with T2DM or impaired glucose tolerance (IGT) and in those without, and the contribution of OSA to their levels...
January 5, 2018: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/29305416/involvement-of-hepcidin-in-iron-metabolism-dysregulation-in-gaucher-disease
#10
Thibaud Lefebvre, Niloofar Reihani, Raed Daher, Thierry Billette de Villemeur, Nadia Belmatoug, Christian Rose, Yves Colin-Aronovicz, Hervé Puy, Caroline Le Van Kim, Mélanie Franco, Zoubida Karim
Gaucher disease is an inherited deficiency of glucocerebrosidase leading to accumulation of glucosylceramide in tissues such as the spleen, liver, and bone marrow. The resulting lipid-laden macrophages lead to the appearance of Gaucher cells. Anemia associated with an unexplained hyperferritinemia is a frequent finding in Gaucher disease, but whether this pathogenesis is related to an iron metabolism disorder has remained unclear. To investigate this issue, we explored the iron status of a large cohort of 90 type I Gaucher disease patients, including 66 patients treated with enzyme replacement therapy...
January 5, 2018: Haematologica
https://www.readbyqxmd.com/read/29296203/the-pathogenesis-of-diclofenac-induced-immunoallergic-hepatitis-in-a-canine-model-of-liver-injury
#11
Saravanakumar Selvaraj, Jung-Hwa Oh, Reinhard Spanel, Florian Länger, Hyoung-Yun Han, Eun-Hee Lee, Seokjoo Yoon, Jürgen Borlak
Hypersensitivity to non-steroidal anti-inflammatory drugs is a common adverse drug reaction and may result in serious inflammatory reactions of the liver. To investigate mechanism of immunoallergic hepatitis beagle dogs were given 1 or 3 mg/kg/day (HD) oral diclofenac for 28 days. HD diclofenac treatment caused liver function test abnormalities, reduced haematocrit and haemoglobin but induced reticulocyte, WBC, platelet, neutrophil and eosinophil counts. Histopathology evidenced hepatic steatosis and glycogen depletion, apoptosis, acute lobular hepatitis, granulomas and mastocytosis...
December 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/29291402/chop-induces-apoptosis-by-affecting-brain-iron-metabolism-in-rats-with-subarachnoid-hemorrhage
#12
Jun Zhao, Xiang Xiang, Hongxia Zhang, Dengzhi Jiang, Yidan Liang, Wang Qing, Liu Liu, Qing Zhao, Zhaohui He
The endoplasmic reticulum stress-related factor CCAAT/enhancer binding protein (C/EBP) homologous protein (CHOP) aggravates early brain injury (EBI) in rats after subarachnoid hemorrhage (SAH). Our research aims to investigate the role of CHOP-mediated iron metabolism in EBI after SAH and the underlying mechanism. Male Sprague-Dawley rats were used to establish SAH models. Tunicamycin (Tm) was employed to excite CHOP expression, and two CHOP small interfering RNAs (siRNAs) were used to inhibit CHOP expression...
December 29, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/29282766/erythroferrone-and-iron-status-parameters-levels-in-pediatric-patients-with-iron-deficiency-anemia
#13
Fady M El Gendy, Mahmoud A El-Hawy, Amira Mf Shehata, Hanaa E Osheba
OBJECTIVES: To investigate the link between serum erythroferrone levels and iron status parameters in pediatric patients with iron deficiency anemia. METHODS: The study consisted of 66 children (36 with iron deficiency anemia and 30 healthy age- and gender-matched controls) who were investigated for serum levels of iron, total iron binding capacity (TIBC) using automated chemistry analyzer, serum ferritin using electrochemiluminescence immunoassay and ERFE by specific enzyme-linked immunosorbent assay (ELISA) kit...
December 28, 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/29280410/iron-balance-and-iron-supplementation-for-the-female-athlete-a-practical-approach
#14
Charles R Pedlar, Carlo Brugnara, Georgie Bruinvels, Richard Burden
Maintaining a positive iron balance is essential for female athletes to avoid the effects of iron deficiency and anaemia and to maintain or improve performance. A major function of iron is in the production of the oxygen and carbon dioxide carrying molecule, haemoglobin, via erythropoiesis. Iron balance is under the control of a number of factors including the peptide hormone hepcidin, dietary iron intake and absorption, environmental stressors (e.g. altitude), exercise, menstrual blood loss and genetics. Menstruating females, particularly those with heavy menstrual bleeding are at an elevated risk of iron deficiency...
December 27, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/29273360/the-diagnostic-value-of-hepcidin-to-predict-the-presence-and-severity-of-appendicitis-in-children
#15
Margarita Kaiser, Magdalena Schroeckenfuchs, Christoph Castellani, Gert Warncke, Holger Till, Georg Singer
BACKGROUND: The aim of this study was to determine the diagnostic capacity of hepcidin in pediatric acute appendicitis and its accuracy as a predictor of the severity of appendicitis. MATERIALS AND METHODS: In children with appendicitis (n = 39), leukocytes, platelet count, and the serum levels of C-reactive protein (CRP) and hepcidin were compared to a control group (n = 25) of patients with unspecific abdominal pain. Additionally, parameters were compared between children with simple (n = 17) and complicated appendicitis (n = 22)...
February 2018: Journal of Surgical Research
https://www.readbyqxmd.com/read/29261151/iron-overload-and-chelation-therapy-in-non-transfusion-dependent-thalassemia
#16
REVIEW
Rayan Bou-Fakhredin, Abdul-Hamid Bazarbachi, Bachar Chaya, Joseph Sleiman, Maria Domenica Cappellini, Ali T Taher
Iron overload (IOL) due to increased intestinal iron absorption constitutes a major clinical problem in patients with non-transfusion-dependent thalassemia (NTDT), which is a cumulative process with advancing age. Current models for iron metabolism in patients with NTDT suggest that suppression of serum hepcidin leads to an increase in iron absorption and subsequent release of iron from the reticuloendothelial system, leading to depletion of macrophage iron, relatively low levels of serum ferritin, and liver iron loading...
December 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29260001/normalizing-serum-hepcidin-but-not-%C3%AE-1-antitrypsin-level-during-effective-treatment-of-chronic-hepatitis-c
#17
Magdalena Rogalska-Taranta, Jerzy Jaroszewicz, Robert Flisiak
Aim of the study: We investigated the impact of pegylated interferon α-2 in combination with ribavirin (PEG-IFNα/RBV) treatment on hepcidin and α-1-antitrypsin concentrations in the serum of patients with chronic hepatitis C. Material and methods: We measured serum concentrations of hepcidin, prohepcidin and α-1-antitrypsin by enzyme-linked immunosorbent assays in patients with chronic hepatitis C before and during antiviral therapy. Results: Hepcidin concentrations were increased in both genotype 1b and 3a hepatitis C virus (HCV) infected patients as compared with the control group...
December 2017: Clinical and Experimental Hepatology
https://www.readbyqxmd.com/read/29258550/the-impact-of-antiretroviral-therapy-on-iron-homeostasis-and-inflammation-markers-in-hiv-infected-patients-with-mild-anemia
#18
Eugenia Quiros-Roldan, Francesco Castelli, Paola Lanza, Chiara Pezzoli, Marika Vezzoli, Giorgio Biasiotto, Isabella Zanella
BACKGROUND: Anemia is frequent during HIV infection and is predictive of mortality. Although cART has demonstrated to reduce its prevalence, several patients still experience unresolved anemia. We aimed to characterize iron homeostasis and inflammation in HIV-infected individuals with mild anemia in relation to cART. METHODS: In this retrospective cohort study, HIV-infected patients with mild anemia, CD4+ cells > 200/mm3 at baseline, maintaining virological response for 12 months after cART starting were selected within the Standardized Management of Antiretroviral Therapy Cohort (MASTER) cohort...
December 19, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29247214/dysregulation-of-iron-metabolism-in-cholangiocarcinoma-stem-like-cells
#19
Chiara Raggi, Elena Gammella, Margherita Correnti, Paolo Buratti, Elisa Forti, Jesper B Andersen, Gianfranco Alpini, Shannon Glaser, Domenico Alvaro, Pietro Invernizzi, Gaetano Cairo, Stefania Recalcati
Cholangiocarcinoma (CCA) is a devastating liver tumour arising from malignant transformation of bile duct epithelial cells. Cancer stem cells (CSC) are a subset of tumour cells endowed with stem-like properties, which play a role in tumour initiation, recurrence and metastasis. In appropriate conditions, CSC form 3D spheres (SPH), which retain stem-like tumour-initiating features. Here, we found different expression of iron proteins indicating increased iron content, oxidative stress and higher expression of CSC markers in CCA-SPH compared to tumour cells growing as monolayers...
December 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29241202/ghrelin-is-negatively-correlated-with-iron-in-the-serum-in-human-and-mice
#20
Qian-Qian Luo, Gan Zhou, Su-Na Huang, Ming-Dao Mu, Yun-Jin Chen, Zhong-Ming Qian
BACKGROUND/AIMS: The studies in the patients with iron deficiency anemia (IDA) implied the existence of the association of ghrelin with iron or hepcidin levels in the plasma under the pathophysiological conditions. We hypothesized that fasting may be able to affect iron metabolism via ghrelin under the physiological conditions. METHODS: We investigated the effects of fasting on serum ghrelin and iron contents in healthy volunteers (23-31 years) and C57BL/6 male mice (8-week-olds) under the physiological conditions...
December 14, 2017: Annals of Nutrition & Metabolism
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