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Iron metabolism

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https://www.readbyqxmd.com/read/28727775/adolescent-health-in-rural-ghana-a-cross-sectional-study-on-the-co-occurrence-of-infectious-diseases-malnutrition-and-cardio-metabolic-risk-factors
#1
Marie Alicke, Justice K Boakye-Appiah, Inusah Abdul-Jalil, Andrea Henze, Markus van der Giet, Matthias B Schulze, Florian J Schweigert, Frank P Mockenhaupt, George Bedu-Addo, Ina Danquah
In sub-Saharan Africa, infectious diseases and malnutrition constitute the main health problems in children, while adolescents and adults are increasingly facing cardio-metabolic conditions. Among adolescents as the largest population group in this region, we investigated the co-occurrence of infectious diseases, malnutrition and cardio-metabolic risk factors (CRFs), and evaluated demographic, socio-economic and medical risk factors for these entities. In a cross-sectional study among 188 adolescents in rural Ghana, malarial infection, common infectious diseases and Body Mass Index were assessed...
2017: PloS One
https://www.readbyqxmd.com/read/28726180/epr-characterization-of-dinitrosyl-iron-complexes-with-thiol-containing-ligands-as-an-approach-to-their-identification-in-biological-objects-an-overview
#2
REVIEW
Anatoly F Vanin
The overview demonstrates how the use of only one physico-chemical approach, viz., the electron paramagnetic resonance method, allowed detection and identification of dinitrosyl iron complexes with thiol-containing ligands in various animal and bacterial cells. These complexes are formed in biological objects in the paramagnetic (electron paramagnetic resonance-active) mononuclear and diamagnetic (electron paramagnetic resonance-silent) binuclear forms and control the activity of nitrogen monoxide, one of the most universal regulators of metabolic processes in the organism...
July 19, 2017: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28724916/involvement-of-the-p62-nrf2-signal-transduction-pathway-on-erythrophagocytosis
#3
Inês B Santarino, Michelle S Viegas, Neuza S Domingues, Ana M Ribeiro, Miguel P Soares, Otília V Vieira
Erythrophagocytosis, the phagocytic removal of damaged red blood cells (RBC), and subsequent phagolysosome biogenesis are important processes in iron/heme metabolism and homeostasis. Phagolysosome biogenesis implies the interaction of nascent phagosomes with endocytic compartments and also autophagy effectors. Here, we report that besides recruitment of microtubule-associated protein-1-light chain 3 (LC3), additional autophagy machinery such as sequestosome 1 (p62) is also acquired by single-membrane phagosomes at very early stages of the phagocytic process and that its acquisition is very important to the outcome of the process...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28721153/fibroblast-growth-factor-23-iron-and-inflammation-are-they-related-in-early-stages-of-chronic-kidney-disease
#4
Ewelina Lukaszyk, Mateusz Lukaszyk, Ewa Koc-Zorawska, Anna Bodzenta-Lukaszyk, Jolanta Malyszko
INTRODUCTION: Fibroblast growth factor 23 (FGF-23) levels are elevated in impaired renal function. Inflammation and iron are potential regulators of FGF-23. The aim of the study was to evaluate the association between FGF-23 concentration, novel iron status biomarkers and inflammatory parameters among patients with early stages of chronic kidney disease (CKD). MATERIAL AND METHODS: The study population included 84 patients with CKD in the early stage. Serum hemoglobin, fibrinogen, creatinine, iron, transferrin saturation and ferritin levels were measured using standard laboratory methods...
June 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28720846/physiological-stress-induced-corticosterone-increases-heme-uptake-via-klf4-hcp1-signaling-pathway-in-hippocampus-neurons
#5
Hongxia Li, Caixia Zhang, Hui Shen, Zhilei Shen, Lusha Wu, Fengfeng Mo, Min Li
Iron overload has attracted much attention because of its adverse effect in increasing the risk of developing several neurodegenerative disorders. Under various pathologic conditions, a lot of heme are released. The aggregation of heme is more neurotoxic than that of iron released from the heme breakdown. Our previous studies demonstrated that psychological stress (PS) is a risk factor of cerebral iron metabolism disorders, thus causing iron accumulation in rat brains. In the present study, we found PS could increase heme uptake via heme carrier protein 1 (HCP1) in rat brains...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28720735/a-nonredundant-phosphopantetheinyl-transferase-ppta-is-a-novel-antifungal-target-that-directs-secondary-metabolite-siderophore-and-lysine-biosynthesis-in-aspergillus-fumigatus-and-is-critical-for-pathogenicity
#6
Anna Johns, Daniel H Scharf, Fabio Gsaller, Hella Schmidt, Thorsten Heinekamp, Maria Straßburger, Jason D Oliver, Mike Birch, Nicola Beckmann, Katharine S Dobb, Jane Gilsenan, Bharatkumar Rash, Elaine Bignell, Axel A Brakhage, Michael J Bromley
Secondary metabolites are key mediators of virulence for many pathogens. Aspergillus fumigatus produces a vast array of these bioactive molecules, the biosynthesis of which is catalyzed by nonribosomal peptide synthetases (NRPSs) or polyketide synthases (PKSs). Both NRPSs and PKSs harbor carrier domains that are primed for acceptance of secondary metabolic building blocks by a phosphopantetheinyl transferase (P-pant). The A. fumigatus P-pant PptA has been shown to prime the putative NRPS Pes1 in vitro and has an independent role in lysine biosynthesis; however, its role in global secondary metabolism and its impact on virulence has not been described...
July 18, 2017: MBio
https://www.readbyqxmd.com/read/28720726/mitochondrial-cochaperone-mge1-is-involved-in-regulating-susceptibility-to-fluconazole-in-saccharomyces-cerevisiae-and-candida-species
#7
Liesbeth Demuyser, Erwin Swinnen, Alessandro Fiori, Beatriz Herrera-Malaver, Kevin Vestrepen, Patrick Van Dijck
MGE1 encodes a yeast chaperone involved in Fe-S cluster metabolism and protein import into the mitochondria. In this study, we identified MGE1 as a multicopy suppressor of susceptibility to the antifungal fluconazole in the model yeast Saccharomyces cerevisiae We demonstrate that this phenomenon is not exclusively dependent on the integrity of the mitochondrial DNA or on the presence of the drug efflux pump Pdr5. Instead, we show that the increased dosage of Mge1 plays a protective role by retaining increased amounts of ergosterol upon fluconazole treatment...
July 18, 2017: MBio
https://www.readbyqxmd.com/read/28718696/tumor-induced-disorder-of-iron-metabolism-in-major-organs-a-new-insight-from-chemical-speciation-of-iron
#8
Rujie Chen, Guangcun Chen
Objective To investigate the evolution of iron speciation in major organs of tumor-bearing mice and its role in cancer formation and cancer-associated complications. Methods The concentration and chemical speciation of iron in the spleen, liver, lung, kidney, heart, blood, muscle, and tumor tissue of healthy mice and tumor-bearing mice were studied by synchrotron radiation-based total reflection X-ray fluorescence spectrometry (SR-TXRF) coupled with X-ray absorption spectroscopy (XAS). Results The TXRF and XAS results showed that the iron content, especially the ferritin content, significantly decreased in the blood and spleen but significantly increased in the liver, lung, and muscle of mice after tumor implantation...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28718091/nutritional-and-micronutrient-care-of-bariatric-surgery-patients-current-evidence-update
#9
REVIEW
Michael A Via, Jeffrey I Mechanick
PURPOSE OF REVIEW: The continued success of bariatric surgery to treat obesity and obesity-associated metabolic conditions creates a need for a strong understanding of clinical nutrition both before and after these procedures. RECENT FINDINGS: Surgically induced alteration of gastrointestinal physiology can affect the nutrition of individuals, especially among those who have undergone malabsorptive procedures. While uncommon, a subset of patients may develop protein-calorie malnutrition...
July 17, 2017: Current Obesity Reports
https://www.readbyqxmd.com/read/28717990/iron-based-phosphate-binders-a-paradigm-shift-in-the-treatment-of-hyperphosphatemic-anemic-ckd-patients
#10
REVIEW
Francesco Locatelli, Lucia Del Vecchio
The partial correction of anemia and the normalization of phosphate and blood pressure are the mainstay of treatment of patients with chronic kidney disease (CKD). Available anti-hypertensive drugs, erythropoiesis stimulating agents (ESAs) and iron supplements have resolved quite satisfactorily the goal of controlling hypertension and partially correcting anemia. Unfortunately, the treatment of hyperphosphatemia is still far from resolved. Phosphate binders have poor tolerability and/or limited efficacy, leading to the prescription of many tablets that achieve only a mild-to-moderate effect...
July 17, 2017: Journal of Nephrology
https://www.readbyqxmd.com/read/28716262/new-genetic-causes-for-complex-hereditary-spastic-paraplegia
#11
Paulo Victor Sgobbi de Souza, Thiago Bortholin, Renan Braido Dias, Marco Antônio Troccoli Chieia, Stênio Burlin, Fernando George Monteiro Naylor, Wladimir Bocca Vieira de Rezende Pinto, Acary Souza Bulle Oliveira
INTRODUCTION: Hereditary Spastic Paraplegia (HSP) represents a complex and heterogeneous group of rare neurodegenerative disorders that share a common clinical feature of weakness and lower limb spasticity that can occur alone or in combination with a constellation of other neurological or systemic signs and symptoms. Although the core clinical feature of weakness and lower limb spasticity is virtually universal, the genetic heterogeneity is almost uncountable with more than 70 genetic forms described so far...
August 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28715881/comparison-of-bone-metabolism-based-on-the-different-ages-and-competition-levels-of-junior-and-high-school-female-rhythmic-gymnasts
#12
Taewoong Oh, Tatsuki Naka
PURPOSE: This study was to clarify the effect of age and competition level by measuring bone metabolism markers and bone mineral density measurements of junior high school and high school female rhythmic gymnasts, who restrict their diets to maintain a low body weight, while routinely undertaking long hours of high-intensity exercise, comparing the gymnasts based on their elite/non-elite. METHODS: The study investigated 7 junior high school and 12 high school female rhythmic gymnasts...
June 30, 2017: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/28712636/human-exoproteome-in-acute-apical-abscesses
#13
Cristiane F Alfenas, Tiago A O Mendes, Humberto J O Ramos, Fernanda P Bruckner, Henrique S Antunes, Isabela N Rôças, José F Siqueira, José C Provenzano
INTRODUCTION: An acute apical abscess is a severe response of the host to massive invasion of the periapical tissues by bacteria from infected root canals. Although many studies have investigated the microbiota involved in the process, information on the host factors released during abscess formation is scarce. The purpose of this study was to describe the human exoproteome in samples from acute apical abscesses. METHODS: Fourteen pus samples were obtained by aspiration from patients with an acute apical abscess...
July 13, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28711463/modulation-of-atlantic-salmon-mirnome-response-to-sea-louse-infestation
#14
REVIEW
Valentina Valenzuela-Muñoz, Beatriz Novoa, Antonio Figueras, Cristian Gallardo-Escárate
MicroRNAs are non-coding RNA that plays a crucial role in post-transcriptional regulation and immune system regulation. On other hand, sea lice are prevalent parasites that affect salmon farming, generating different degrees of immune suppression depending on the salmon and sea louse species. Caligus rogercresseyi for example, which affects the salmon industry in Chile, decreases Th1 response, macrophage activation, TLR-mediated response and iron regulation in infected fish. In this study, we explore Atlantic salmon miRNome during infestation by C...
July 12, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28710269/molecular-mechanism-and-genetic-determinants-of-buprofezin-degradation
#15
Xueting Chen, Junbin Ji, Leizhen Zhao, Jiguo Qiu, Chen Dai, Weiwu Wang, Jian He, Jiandong Jiang, Qing Hong, Xin Yan
Buprofezin is a widely used insect growth regulator whose residue has been frequently detected in the environment, posing a threat to aquatic organisms and non-target insects. Microorganisms play an important role in the degradation of buprofezin in the natural environment. However, the relevant catabolic pathway has not been fully characterized, and the molecular mechanism of catabolism is still completely unknown. Rhodococcus qingshengii YL-1 can utilize buprofezin as a sole source of carbon and energy for growth...
July 14, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28710073/zinc-mediates-the-srebp-scd-axis-to-regulate-lipid-metabolism-in-caenorhabditis-elegans
#16
Jing-Jing Zhang, Jun-Jun Hao, Yu-Ru Zhang, Yan-Li Wang, Ming-Yi Li, Hui-Lai Miao, Xiao-Ju Zou, Bin Liang
Maintenance of lipid homeostasis is crucial for cells in response to lipid requirements or surplus. The SREBPs transcription factors play essential roles in regulating lipid metabolism and are associated with many metabolic diseases. However, SREBP regulation of lipid metabolism is still less understood. Here, we show that reduction of SBP-1, the only homologue of SREBPs in C. elegans, surprisingly leads to high level of zinc. On the contrary, zinc reduction by mutation of sur-7, encoding a member of the cation diffusion facilitator (CDF) family, restores the fat accumulation and fatty acid profile of sbp-1(ep79) mutant...
July 14, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28708597/mri-based-evaluation-of-multiorgan-iron-overload-is-a-predictor-of-adverse-outcomes-in-pediatric-patients-undergoing-allogeneic-hematopoietic-stem-cell-transplantation
#17
Natalia Maximova, Massimo Gregori, Giulia Boz, Roberto Simeone, Davide Zanon, Giulia Schillani, Floriana Zennaro
The medical records of 44 pediatric patients who underwent allogeneic transplantation from 2011 to 2015 were retrospectively reviewed. Magnetic resonance imaging was used to measure iron concentrations in the liver, spleen, pancreas and bone. These patients were divided into two groups, 18 with non-elevated (< 100 μmol/g; Group 1) liver iron concentration before transplantation and 26 with elevated (> 100 μmol/g; Group 2) concentration . We compared transplant-related outcomes in the two groups. Iron overload was a negative prognostic risk factor for sinusoidal obstruction syndrome (OR = 17), osteoporosis (OR = 6...
July 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/28706239/increased-adipose-tissue-heme-levels-and-exportation-are-associated-with-altered-systemic-glucose-metabolism
#18
José María Moreno-Navarrete, Amaia Rodríguez, Francisco Ortega, Sara Becerril, Mònica Sabater-Masdeu, Jessica Latorre, Wifredo Ricart, Gema Frühbeck, José Manuel Fernández-Real
Iron status is known to be associated with the physiology of adipose tissue (AT). We aimed to investigate AT heme and expression of heme exporter (FLVCR1) in association with obesity and type 2 diabetes (T2D). Substantial amounts of FLVCR1 mRNA and protein levels were detected in AT, being significantly increased in subjects with T2D, and positively correlated with fasting glucose, fasting triglycerides and with circulating markers of iron stores (serum ferritin, blood hemoglobin and hematocrit). In both visceral (VAT) and subcutaneous AT (SAT), increased heme levels were found in subjects with T2D...
July 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28705658/disturbance-of-redox-homeostasis-in-down-syndrome-role-of-iron-dysmetabolism
#19
REVIEW
Eugenio Barone, Andrea Arena, Elizabeth Head, D Allan Butterfield, Marzia Perluigi
Down syndrome (DS) is the most common genetic form of intellectual disability that leads in the majority of cases to development of early-onset Alzheimer-like dementia (AD). The neuropathology of DS has several common features with AD including alteration of redox homeostasis, mitochondrial deficits, and inflammation among others. Interestingly, some of the genes encoded by chromosome 21 are responsible of increased oxidative stress (OS) conditions that are further exacerbated by decreased antioxidant defense...
July 10, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28704940/effects-of-protein-iron-complex-concentrate-supplementation-on-iron-metabolism-oxidative-and-immune-status-in-preweaning-calves
#20
Robert Kupczyński, Michał Bednarski, Kinga Śpitalniak, Krystyna Pogoda-Sewerniak
The objective of this study was to determine the effects of feeding protein-iron complex (PIC) on productive performance and indicators of iron metabolism, hematology parameters, antioxidant and immune status during first 35 days of a calf's life. Preparation of the complex involved enzymatic hydrolysis of milk casein (serine protease from Yarrowia lipolytica yeast). Iron chloride was then added to the hydrolyzate and lyophilizate. Calves were divided into treated groups: LFe (low iron dose) 10 g/day calf of protein-iron complex, HFe (height iron dose) 20 g/day calf, and control group...
July 12, 2017: International Journal of Molecular Sciences
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