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https://www.readbyqxmd.com/read/28550259/transport-of-non-transferrin-bound-iron-to-the-brain-implications-for-alzheimer-s-disease
#1
Ajai K Tripathi, Shilpita Karmakar, Abhishek Asthana, Ajay Ashok, Vilok Desai, Shounak Baksi, Neena Singh
A direct correlation between brain iron and Alzheimer's disease (AD) raises questions regarding the transport of non-transferrin-bound iron (NTBI), a toxic but less researched pool of circulating iron that is likely to increase due to pathological and/or iatrogenic systemic iron overload. Here, we compared the distribution of radiolabeled-NTBI (59Fe-NTBI) and transferrin-bound iron (59Fe-Tf) in mouse models of iron overload in the absence or presence of inflammation. Following a short pulse, most of the 59Fe-NTBI was taken up by the liver, followed by the kidney, pancreas, and heart...
May 25, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28546762/cardiovascular-magnetic-resonance-imaging-clinical-implications-in-the-evaluation-of-connective-tissue-diseases
#2
REVIEW
Sophie Mavrogeni, George Markousis-Mavrogenis, Loukia Koutsogeorgopoulou, Genovefa Kolovou
Cardiovascular magnetic resonance imaging is a recently developed noninvasive, nonradiating, operator-independent technique that has been successfully used for the evaluation of congenital heart disease, valvular and pericardial diseases, iron overload, cardiomyopathies, great and coronary vessel diseases, cardiac inflammation, stress-rest myocardial perfusion, and fibrosis. Rheumatoid arthritis and other spondyloarthropathies, systemic lupus erythematosus, inflammatory myopathies, mixed connective tissue diseases (CTDs), systemic sclerosis, vasculitis, and sarcoidosis are among CTDs with serious cardiovascular involvement; this is due to multiple causative factors such as myopericarditis, micro/macrovascular disease, coronary artery disease, myocardial fibrosis, pulmonary hypertension, and finally heart failure...
2017: Journal of Inflammation Research
https://www.readbyqxmd.com/read/28545989/does-pathological-iron-overload-impair-the-function-of-human-lungs
#3
Tomas Ganz
No abstract text is available yet for this article.
May 17, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28544309/increased-complications-of-chronic-erythrocytapheresis-compared-with-manual-exchange-transfusions-in-children-and-adolescents-with-sickle-cell-disease
#4
Deborah Woods, Robert J Hayashi, Michael M Binkley, Gianna W Sparks, Monica L Hulbert
BACKGROUND: Children and adolescents with sickle cell disease (SCD) are at high risk of strokes and are frequently treated with red blood cell (RBC) transfusions. The goal is to suppress hemoglobin (Hb) S while minimizing transfusion-induced iron overload. RBCs may be given via simple transfusion, manual exchange transfusion (MET), or erythrocytapheresis (aRBCX). Chronic transfusion practices vary among institutions. METHODS: This single-institution, retrospective cohort study compares Hb S control and therapy complication rates between MET and aRBCX in a cohort of children and adolescents with SCD and stroke during a 5-year period from 2008 through 2012...
May 19, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28544032/prevalence-of-diabetes-mellitus-in-chinese-children-with-thalassaemia-major
#5
Yuzhen Liang, Rekha Bajoria, Yan Jiang, Hongwei Su, Hongfei Pan, Ning Xia, Ratna Chatterjee, Yongrong Lai
OBJECTIVE: Diabetes mellitus is a common endocrinopathy in patients with β-thalassaemia major (β-TM), which is high prevalent in southern China. This study aimed to determine the cause and prevalence of glycaemic disorders in Chinese children with β-TM. METHODS: In this prospective study, fasting glucose and insulin (FINS) levels were assessed in 267 β-TM and 80 non-TM control children. Homeostatic model assessment (HOMA) and the quantitative insulin sensitivity check index (QUICKI) were evaluated...
May 22, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/28543915/cross-sectional-correlation-between-hepatic-r2-and-proton-density-fat-fraction-pdff-in-children-with-hepatic-steatosis
#6
Adrija Mamidipalli, Gavin Hamilton, Paul Manning, Cheng William Hong, Charlie C Park, Tanya Wolfson, Jonathan Hooker, Elhamy Heba, Alexandra Schlein, Anthony Gamst, Janis Durelle, Melissa Paiz, Michael S Middleton, Jeffrey B Schwimmer, Claude B Sirlin
PURPOSE: To determine the relationship between hepatic proton density fat fraction (PDFF) and R2* in vivo. MATERIALS AND METHODS: In this Health Insurance Portability and Accountability Act (HIPAA)-compliant, Institutional Review Board (IRB)-approved, cross-sectional study, we conducted a secondary analysis of 3T magnetic resonance imaging (MRI) exams performed as part of prospective research studies in children in whom conditions associated with iron overload were excluded clinically...
May 25, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28542307/the-mouse-char10-locus-regulates-severity-of-pyruvate-kinase-deficiency-and-susceptibility-to-malaria
#7
Aurélie Laroque, Gundula Min-Oo, Mifong Tam, Prem Ponka, Mary M Stevenson, Philippe Gros
Pyruvate kinase (PKLR) deficiency protects mice and humans against blood-stage malaria. Although mouse strain AcB62 carries a malaria-protective PklrI90N genetic mutation, it is phenotypically susceptible to blood stage malaria induced by infection with Plasmodium chabaudi AS, suggesting a genetic modifier of the PklrI90N protective effect. Linkage analysis in a F2 cross between AcB62 (PklrI90N) and another PK deficient strain CBA/Pk (PklrG338D) maps this modifier (designated Char10) to chromosome 9 (LOD = 10...
2017: PloS One
https://www.readbyqxmd.com/read/28540293/altered-erythropoiesis-in-mouse-models-of-type-3-hemochromatosis
#8
R M Pellegrino, F Riondato, L Ferbo, M Boero, A Palmieri, L Osella, P Pollicino, B Miniscalco, G Saglio, A Roetto
Type 3 haemochromatosis (HFE3) is a rare genetic iron overload disease which ultimately lead to compromised organs functioning. HFE3 is caused by mutations in transferrin receptor 2 (TFR2) gene that codes for two main isoforms (Tfr2α and Tfr2β). Tfr2α is one of the hepatic regulators of iron inhibitor hepcidin. Tfr2β is an intracellular isoform of the protein involved in the regulation of iron levels in reticuloendothelial cells. It has been recently demonstrated that Tfr2 is also involved in erythropoiesis...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28536109/effect-of-iron-on-cholesterol-7-alpha-hydroxylase-expression-in-alcohol-induced-hepatic-steatosis-in-mouse
#9
Huan Liang, Hui Huang, Pei-Zhu Tan, Ying Liu, Jun-Hui Nie, Yi-Tong Zhang, Kai-Li Zhang, Yan Diao, Qi He, Bao-Yu Hou, Ting-Ting Zhao, Yan-Ze Li, Gui-Xiang Lv, Ki-Yong Lee, Xu Gao, Ling-Yun Zhou
Both iron and lipids are involved in the progression of alcoholic fatty liver disease (AFLD), but the interaction between iron and lipids in AFLD is unclear. Here, we tested the hypothesis that iron regulates the expression of genes involved in lipid metabolism through iron regulatory proteins (IRPs), which interact with the iron-responsive elements (IREs) in the UTRs of genes, resulting in lipid accumulation. Using the "RNA structure software", we predicted the mRNA secondary structures of more than 100 genes involved in lipid metabolism to investigate whether the IRE structure exists in novel mRNAs...
May 23, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28534662/neuroprotection-of-brain-permeable-iron-chelator-vk-28-against-intracerebral-hemorrhage-in-mice
#10
Qian Li, Jieru Wan, Xi Lan, Xiaoning Han, Zhongyu Wang, Jian Wang
Iron overload plays a key role in the secondary brain damage that develops after intracerebral hemorrhage (ICH). The significant increase in iron deposition is associated with the generation of reactive oxygen species (ROS), which leads to oxidative brain damage. In this study, we examined the protective effects of VK-28, a brain-permeable iron chelator, against hemoglobin toxicity in an ex vivo organotypic hippocampal slice culture (OHSC) model and in middle-aged mice subjected to an in vivo, collagenase-induced ICH model...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28532285/utility-of-transient-elastography-in-estimating-hepatic-iron-concentration-in-comparison-to-magnetic-resonance-imaging-in-patients-who-are-transfusion-dependent-a-canadian-center-experience
#11
George Ou, Hin Hin Ko, Pari Tiwari, Navdeep Sandhu, Cherry Galorport, Terry Lee, Hatoon Ezzat
Transfusion-dependent hereditary anemias such as β-thalassemia (β-thal), predispose patients to iron overload and its numerous clinical sequelae. Accurate assessment of overall iron status and prompt initiation of chelation therapy to prevent irreversible end-organ damage can be achieved using magnetic resonance imaging (MRI) to measure liver iron concentration (LIC) as a surrogate marker of total body iron; however, its access may be associated with long wait times and delay in treatment. We report an observational cohort study at a single tertiary care center assessing the theoretical role of transient elastography (TE), which measures liver stiffness, in estimating LIC compared to other established diagnostic measures...
January 2017: Hemoglobin
https://www.readbyqxmd.com/read/28530443/association-of-single-nucleotide-polymorphism-in-the-hepcidin-promoter-gene-with-susceptibility-to-extrapulmonary-tuberculosis
#12
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...
May 22, 2017: Genetic Testing and Molecular Biomarkers
https://www.readbyqxmd.com/read/28521818/in-vivo-evaluation-of-microglia-activation-by-intracranial-iron-overload-in-central-pain-after-spinal-cord-injury
#13
Fan Xing Meng, Jing Ming Hou, Tian Sheng Sun
BACKGROUND: Central pain (CP) is a common clinical problem in patients with spinal cord injury (SCI). Recent studies found the pathogenesis of CP was related to the remodeling of the brain. We investigate the roles of iron overload and subsequent microglia activate in the remodeling of the brain after SCI. METHODS: An SCI-induced CP model was established in Sprague-Dawley rats that were randomly assigned to SCI, sham operation, deferoxamine (DFX), minocycline, and nitric oxide synthase inhibitor treatment groups...
May 18, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28516443/multiple-red-blood-cell-transfusions-and-iron-overload-in-very-low-birthweight-infants
#14
J D Treviño-Báez, E Briones-Lara, J Alamillo-Velázquez, M I Martínez-Moreno
BACKGROUND AND OBJECTIVES: To estimate the risk of iron overload in very low birthweight (VLBW) infants who receive more than two red blood cell (RBC) transfusions, in comparison with those who receive two or less during their hospital stay. MATERIALS AND METHODS: Prospective open cohort study in VLBW infants with >2 (exposed) and ≤2 (non-exposed) RBC transfusions. Ferritin, alanine aminotransferase (ALT) and aspartate aminotransferase (AST) were measured at birth and after each RBC transfusion...
May 18, 2017: Vox Sanguinis
https://www.readbyqxmd.com/read/28515908/renal-manifestations-of-primary-mitochondrial-disorders
#15
Josef Finsterer, Fulvio Scorza
The aim of the present review was to summarize and discuss previous findings concerning renal manifestations of primary mitochondrial disorders (MIDs). A literature review was performed using frequently used databases. The study identified that primary MIDs frequently present as mitochondrial multiorgan disorder syndrome (MIMODS) at onset or in the later course of the MID. Occasionally, the kidneys are affected in MIDs. Renal manifestations of MIDs include renal insufficiency, nephrolithiasis, nephrotic syndrome, renal cysts, renal tubular acidosis, Bartter-like syndrome, Fanconi syndrome, focal segmental glomerulosclerosis, tubulointerstitial nephritis, nephrocalcinosis, and benign or malign neoplasms...
May 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28514781/hepcidin-homeostasis-and-diseases-related-to-iron-metabolism
#16
Cadiele Oliana Reichert, Joel da Cunha, Débora Levy, Luciana Morganti Ferreira Maselli, Sérgio Paulo Bydlowski, Celso Spada
Iron is an essential metal for cell survival that is regulated by the peptide hormone hepcidin. However, its influence on certain diseases is directly related to iron metabolism or secondary to underlying diseases. Genetic alterations influence the serum hepcidin concentration, which can lead to an iron overload in tissues, as observed in haemochromatosis, in which serum hepcidin or defective hepcidin synthesis is observed. Another genetic imbalance of iron is iron-refractory anaemia, in which serum concentrations of hepcidin are increased, precluding the flow and efflux of extra- and intracellular iron...
May 18, 2017: Acta Haematologica
https://www.readbyqxmd.com/read/28511389/variability-of-iron-load-in-patients-of-sickle-cell-anaemia-hbss-a-study-from-eastern-india
#17
Pranati Mohanty, Rabindra Kumar Jena, Sudha Sethy
INTRODUCTION: Sickle Cell Anaemia (SCA) is one of the commonest haemoglobinopathies due to a point mutation (A→T) of the β-globin gene. Out of five haplotypes, the Arab-Indian haplotype present in India is one of the least severe phenotype and least studied also. It is characterized by lifelong haemolytic anaemia requiring red cell transfusion leading to iron overload. In contrast, there is very high incidence of deficiency of iron, folic acid and vitamin B12. AIM: Our objective was to access the Iron status of SCA patients and to find its correlation with various parameters like red cell transfusion, haemolysis and serum hepcidin...
March 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28507548/iron-and-hepcidin-independent-downregulation-of-the-iron-exporter-ferroportin-in-macrophages-during-salmonella-infection
#18
Alexandra Willemetz, Sean Beatty, Etienne Richer, Aude Rubio, Anne Auriac, Ruth J Milkereit, Olivier Thibaudeau, Sophie Vaulont, Danielle Malo, François Canonne-Hergaux
Retention of iron in tissue macrophages via upregulation of hepcidin (HAMP) and downregulation of the iron exporter ferroportin (FPN) is thought to participate in the establishment of anemia of inflammation after infection. However, an upregulation of FPN has been proposed to limit macrophages iron access to intracellular pathogens. Therefore, we studied the iron homeostasis and in particular the regulation of FPN after infection with Salmonella enterica serovar Typhimurium in mice presenting tissue macrophages with high iron (AcB61), basal iron (A/J and wild-type mice), or low iron (Hamp knock out, Hamp(-/-)) levels...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28505405/structural-basis-for-xenosiderophore-utilization-by-the-human-pathogen-staphylococcus-aureus
#19
Nathaniel P Endicott, Eries Lee, Timothy Adam Wencewicz
Staphylococcus aureus produces a cocktail of metallophores (staphylopine, staphyloferrin A, and staphyloferrin B) to scavenge transition metals during infection of a host. In addition, S. aureus displays the extracellular surface lipoproteins FhuD1 and FhuD2 along with the ABC transporter complex FhuCBG to facilitate the use of hydroxamate xenosiderophores such as desferrioxamine B (DFOB) for iron acquisition. DFOB is used as a chelation therapy to treat human iron overload diseases and has been linked to an increased risk of S...
May 15, 2017: ACS Infectious Diseases
https://www.readbyqxmd.com/read/28504662/association-between-pretransplant-iron-overload-determined-by-bone-marrow-pathological-analysis-and-bacterial-infection
#20
A Ohmoto, S Fuji, A Miyagi-Maeshima, S-W Kim, K Tajima, T Tanaka, K Okinaka, S Kurosawa, Y Inamoto, H Taniguchi, T Fukuda
No abstract text is available yet for this article.
May 15, 2017: Bone Marrow Transplantation
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