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Iron overload

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https://www.readbyqxmd.com/read/28103293/synergistic-interaction-of-light-alcohol-administration-in-the-presence-of-mild-iron-overload-in-a-mouse-model-of-liver-injury-involvement-of-triosephosphate-isomerase-nitration-and-inactivation
#1
Wanxia Gao, Jie Zhao, Zhonghong Gao, Hailing Li
It is well known that iron overload promotes alcoholic liver injury, but the doses of iron or alcohol used in studies are usually able to induce liver injury independently. Little attention has been paid to the coexistence of low alcohol consumption and mild iron overload when either of them is insufficient to cause obvious liver damage, although this situation is very common among some people. We studied the interactive effects and the underlining mechanism of mild doses of iron and alcohol on liver injury in a mouse model...
2017: PloS One
https://www.readbyqxmd.com/read/28101313/a-young-adult-with-unintended-acute-intravenous-iron-intoxication-treated-with-oral-chelation-the-use-of-liver-ferriscan-for-diagnosing-and-monitoring-tissue-iron-load
#2
Mohamed Yassin, Ashraf T Soliman, Vincenzo De Sanctis, Abbas Moustafa, Sandra Abou Samaan, Abdulqadir Nashwan
Acute iron intoxication (FeI) in humans has not been adequately studied. The manifestation of FeI, defined as a serum iron concentration >300 μg/dL (55 μmol/L) within 12 hours of ingestion, include various symptoms appearing in progressive stages. Systemic toxicity is expected with an intake of 60 mg/kg. A 27-year-old female nurse presented with unintended acute intravenous iron intoxication (FeI) a week after self-injecting herself with 20 ampoules of IV iron (4,000 mg elemental iron, 60 mg/kg). She had stable vital signs and mild hepatic tenderness...
2017: Mediterranean Journal of Hematology and Infectious Diseases
https://www.readbyqxmd.com/read/28101307/review-and-recommendations-on-management-of-adult-female-thalassemia-patients-with-hypogonadism-based-on-literature-review-and-experience-of-icet-a-network-specialists
#3
REVIEW
Vincenzo De Sanctis, Ashraf T Soliman, Heba Elsedfy, Alice Albu, Soad Al Jaouni, Salvatore Anastasi, Maria Grazia Bisconte, Duran Canatan, Soteroula Christou, Shahina Daar, Salvatore Di Maio, Mohamed El Kholy, Doaa Khater, Mohamed Elshinawy, Yurdanur Kilinc, Roberto Mattei, Hala H Mosli, Alessandra Quota, Maria Grazia Roberti, Praveen Sobti, Saif Al Yaarubi, Saveria Canpisi, Christos Kattamis
BACKGROUND: Multi-transfused thalassemia major (TM) patients frequently develop severe endocrine complications, mainly due to iron overload, anemia, and chronic liver disease, which require prompt diagnosis, treatment and follow-up by specialists. The most common endocrine complication documented is hypogonadotropic hypogonadism which increases with age and associated comorbidities. It is thus important for physicians to have a clear understanding of the pathophysiology and management of this disorder...
2017: Mediterranean Journal of Hematology and Infectious Diseases
https://www.readbyqxmd.com/read/28099398/utilizing-a-novel-mobile-health-selfie-application-to-improve-compliance-to-iron-chelation-in-pediatric-patients-receiving-chronic-transfusions
#4
Sarah Leonard, Lindsay M Anderson, Jude Jonassaint, Charles Jonassaint, Nirmish Shah
Iron chelation therapy can prevent iron overload for pediatric patients with sickle cell disease and β-thalassemia major; however, adherence is suboptimal. Therefore, we developed an intensive training program (ITP), to improve medication management and disease knowledge. The objectives were to determine feasibility of the ITP and its preliminary impact on adherence, disease knowledge, and health outcomes. Pediatric patients were recruited to participate in the ITP over a 90-day period and were followed for 6 months...
January 17, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28096133/regulation-of-the-iron-homeostatic-hormone-hepcidin
#5
REVIEW
Veena Sangkhae, Elizabeta Nemeth
Iron is required for many biological processes but is also toxic in excess; thus, body iron balance is maintained through sophisticated regulatory mechanisms. The lack of a regulated iron excretory mechanism means that body iron balance is controlled at the level of absorption from the diet. Iron absorption is regulated by the hepatic peptide hormone hepcidin. Hepcidin also controls iron release from cells that recycle or store iron, thus regulating plasma iron concentrations. Hepcidin exerts its effects through its receptor, the cellular iron exporter ferroportin...
January 2017: Advances in Nutrition
https://www.readbyqxmd.com/read/28095368/iron-overload-and-altered-iron-metabolism-in-ovarian-cancer
#6
Stephanie Rockfield, Joseph Raffel, Radhe Mehta, Nabila Rehman, Meera Nanjundan
Iron is an essential element required for many processes within the cell. Dysregulation in iron homeostasis due to iron overload is detrimental. This nutrient is postulated to contribute to the initiation of cancer; however, the mechanisms by which this occurs remain unclear. Defining how iron promotes the development of ovarian cancers from precursor lesions is essential for developing novel therapeutic strategies. In this review, we discuss (1) how iron overload conditions may initiate ovarian cancer development, (2) dysregulated iron metabolism in cancers, (3) the interplay between bacteria, iron, and cancer, and (4) chemotherapeutic strategies targeting iron metabolism in cancer patients...
January 14, 2017: Biological Chemistry
https://www.readbyqxmd.com/read/28092939/for-better-or-worse-iron-overload-by-superparamagnetic-iron-oxide-nanoparticles-as-a-mri-contrast-agent-for-chronic-liver-diseases
#7
Qibing Zhou, Yushuang Wei
Superparamagnetic iron oxide nanoparticles (SPIONs) have recently been used as an effective magnetic resonance imaging (MRI) contrast agent for the noninvasive diagnosis of chronic liver diseases including nonalcohol fatty liver diseases, nonalcohol steatohepatitis, and cirrhosis as well as liver tumors. However, the potential risk of the iron overload by SPIONs has been highly underestimated in chronic liver diseases. While most of SPIONs have been shown safe in the healthy group, significant toxicity potential by the iron overload has been revealed through immunotoxicity, lipid peroxidation, and fatty acid and cholesterol metabolism in cirrhosis as a high risk factor...
January 17, 2017: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/28090666/quantitative-ultrashort-echo-time-imaging-for-assessment-of-massive-iron-overload-at-1-5-and-3-tesla
#8
Axel J Krafft, Ralf B Loeffler, Ruitian Song, Aaryani Tipirneni-Sajja, M Beth McCarville, Matthew D Robson, Jane S Hankins, Claudia M Hillenbrand
PURPOSE: Hepatic iron content (HIC) quantification via transverse relaxation rate (R2*)-MRI using multi-gradient echo (mGRE) imaging is compromised toward high HIC or at higher fields due to the rapid signal decay. Our study aims at presenting an optimized 2D ultrashort echo time (UTE) sequence for R2* quantification to overcome these limitations. METHODS: Two-dimensional UTE imaging was realized via half-pulse excitation and radial center-out sampling. The sequence includes chemically selective saturation pulses to reduce streaking artifacts from subcutaneous fat, and spatial saturation (sSAT) bands to suppress out-of-slice signals...
January 16, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28080913/liver-ultrasonography-in-dolphins-use-of-ultrasonography-to-establish-a-technique-for-hepatobiliary-imaging-and-to-evaluate-metabolic-disease-associated-liver-changes-in-bottlenose-dolphins-tursiops-truncatus
#9
Kelsey E Seitz, Cynthia R Smith, Stanley L Marks, Stephanie K Venn-Watson, Marina Ivančić
The objective of this study was to establish a comprehensive technique for ultrasound examination of the dolphin hepatobiliary system and apply this technique to 30 dolphins to determine what, if any, sonographic changes are associated with blood-based indicators of metabolic syndrome (insulin greater than 14 μIU/ml or glucose greater than 112 mg/dl) and iron overload (transferrin saturation greater than 65%). A prospective study of individuals in a cross-sectional population with and without elevated postprandial insulin levels was performed...
December 2016: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28076832/dietary-supplementation-of-grape-seed-and-skin-flour-mitigates-brain-oxidative-damage-induced-by-a-high-fat-diet-in-rat-gender-dependency
#10
Kamel Charradi, Mohamed Mahmoudi, Takwa Bedhiafi, Safwen Kadri, Salem Elkahoui, Ferid Limam, Ezzedine Aouani
It is unknown whether gender has an impact on brain injury in obesity, and, if so, whether treatment with grape seed and skin flour could exert a protective effect. Both male and female rats were fed a standard diet (SD) or a high fat diet (HFD) during eight weeks and treated with high dosage grape seed and skin flour (GSSF). Fat-induced oxidative stress was evaluated into the brain with a special emphasis on transition metals determination. HFD induced male-cholesterol overload (+78.12%) and an oxidative stress status characterized by increased lipoperoxidation (+68...
January 8, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28075350/hydroxypyridinone-chelators-from-iron-scavenging-to-radiopharmaceuticals-for-pet-imaging-with-gallium-68
#11
REVIEW
Ruslan Cusnir, Cinzia Imberti, Robert C Hider, Philip J Blower, Michelle T Ma
Derivatives of 3,4-hydroxypyridinones have been extensively studied for in vivo Fe(3+) sequestration. Deferiprone, a 1,2-dimethyl-3,4-hydroxypyridinone, is now routinely used for clinical treatment of iron overload disease. Hexadentate tris(3,4-hydroxypyridinone) ligands (THP) complex Fe(3+) at very low iron concentrations, and their high affinities for oxophilic trivalent metal ions have led to their development for new applications as bifunctional chelators for the positron emitting radiometal, (68)Ga(3+), which is clinically used for molecular imaging in positron emission tomography (PET)...
January 8, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28073521/current-status-of-iron-metabolism-clinical-and-therapeutic-implications
#12
REVIEW
Susana Conde Diez, Ricardo de Las Cuevas Allende, Eulogio Conde García
Hepcidin is the main regulator of iron metabolism and a pathogenic factor in iron disorders. Hepcidin deficiency causes iron overload, whereas hepcidin excess causes or contributes to the development of iron-restricted anaemia in chronic inflammatory diseases. We know the mechanisms involved in the synthesis of hepcidin and, under physiological conditions, there is a balance between activating signals and inhibitory signals that regulate its synthesis. The former include those related to plasmatic iron level and also those related to chronic inflammatory diseases...
January 7, 2017: Medicina Clínica
https://www.readbyqxmd.com/read/28069738/fbxl5-inactivation-in-mouse-brain-induces-aberrant-proliferation-of-neural-stem-progenitor-cells
#13
Takayoshi Yamauchi, Masaaki Nishiyama, Toshiro Moroishi, Atsuki Kawamura, Keiichi I Nakayama
FBXL5 is the substrate recognition subunit of an SCF-type ubiquitin ligase that serves as a master regulator of iron metabolism in mammalian cells. We previously showed that mice with systemic deficiency of FBXL5 fail to sense intracellular iron levels and die in utero at embryonic day (E) 8.5 as a result of iron overload and subsequent oxidative stress. This early embryonic mortality has thus impeded study of the role of FBXL5 in brain development. We have now generated mice lacking FBXL5 specifically in Nestin-expressing neural stem-progenitor cells (NSPCs) in the brain...
January 9, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28068635/inositol-hexa-phosphoric-acid-phytic-acid-a-nutraceuticals-attenuates-iron-induced-oxidative-stress-and-alleviates-liver-injury-in-iron-overloaded-mice
#14
Anwesha Bhowmik, Durbadal Ojha, Debayan Goswami, Rashmi Das, Nidhi S Chandra, Tapan K Chatterjee, Amit Chakravarty, Sudipa Chakravarty, Debprasad Chattopadhyay
Inositol hexa phosphoric acid (IP6) or Phytic acid, a natural antioxidant of some leguminous plants, known to act as a protective agent for seed storage in plants by suppressing iron catalyzed oxidative process. Following the same mechanism, we have tested the effect of IP6 on iron overloaded in vitro oxidative stress, and studied it's in vivo hepatoprotective ability in iron-dextran (injection)-induced iron overloaded liver injury in mice (intraperitoneal). Our results showed that IP6 had in vitro iron chelation (IC50 38...
January 6, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28068331/modelling-systemic-iron-regulation-during-dietary-iron-overload-and-acute-inflammation-role-of-hepcidin-independent-mechanisms
#15
Mihaela Enculescu, Christoph Metzendorf, Richard Sparla, Maximilian Hahnel, Johannes Bode, Martina U Muckenthaler, Stefan Legewie
Systemic iron levels must be maintained in physiological concentrations to prevent diseases associated with iron deficiency or iron overload. A key role in this process plays ferroportin, the only known mammalian transmembrane iron exporter, which releases iron from duodenal enterocytes, hepatocytes, or iron-recycling macrophages into the blood stream. Ferroportin expression is tighly controlled by transcriptional and post-transcriptional mechanisms in response to hypoxia, iron deficiency, heme iron and inflammatory cues by cell-autonomous and systemic mechanisms...
January 9, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28067690/iron-overload-in-the-liver-of-2-children-nonalcoholic-steatohepatitis-and-juvenile-hemochromatosis
#16
Aysel Ünlüsoy Aksu, Angela Caleffi, Antonello Pietrangelo, Sinan Sari, Ödül Eğritaş Gürkan, Zeliha Demirtaş, Güldal Yilmaz, Buket Dalgiç
BACKGROUND: Iron overload disorders are hereditary hemochromatosis and secondary etiologies other than hereditary hemochromatosis. We describe 2 boys presenting with iron overload. Juvenile hemochromatosis and nonalcoholic steatohepatitis (NASH) related iron overload are the genetic and secondary causes, respectively. OBSERVATIONS: Both patients benefited from phlebotomy even if they had different etiologies. CONCLUSIONS: In childhood, the diagnosis of iron overload syndromes is crucial because they do not confront us with obvious symptoms and findings...
January 6, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28065838/current-results-and-future-research-priorities-in-late-effects-after-hematopoietic-stem-cell-transplantation-hct-for-children-with-sickle-cell-disease-and-thalassemia-a-consensus-statement-from-the-second-pediatric-blood-and-marrow-transplant-consortium-international
#17
Shalini Shenoy, Emanuele Angelucci, Staci D Arnold, K Scott Baker, Monica Bhatia, Dorine Bresters, Andrew C Dietz, Josu De La Fuente, Christine Duncan, Javid Gaziev, Allison A King, Michael A Pulsipher, Angela Smith, Mark C Walters
Sustained donor engraftment after allogeneic hematopoietic cell transplantation (HCT) converts to healthy donor hemoglobin synthesis and halts disease symptoms in patients with sickle cell disease (SCD) and thalassemia major. A disease free survival probability that exceeds 90% has been reported when HCT using an HLA-matched sibling donor is performed in young patients with low risk disease or treatment related risk factors. Alternate donor HCT and HCT in adults is performed infrequently due to a higher risk profile...
January 5, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28063856/effectiveness-of-deferoxamine-on-ferric-chloride-induced-epilepsy-in-rats
#18
Xiang Zou, Shize Jiang, Zehan Wu, Yimin Shi, Shengyong Cai, Renqing Zhu, Liang Chen
Iron overload has been regarded as a common cause for refractory epilepsies in patients after hemorrhagic strokes. This study is to examine the potential epilepsy control effect of deferoxamine (DFO), an iron chelator, on a ferric chloride-induced epilepsy rat model. Twenty four rats were divided into 4 groups: group I is blank control group, group II is sham group with intracortical injection of saline, group III is epilepsy group with intracortical injection of iron and saline treatment, group IV is treatment group with intracortical injection of iron and DFO treatment...
January 4, 2017: Brain Research
https://www.readbyqxmd.com/read/28060132/variation-in-transfusion-requirements-among-children-with-thalassemia-on-regular-transfusion-programs-which-formula-closely-predicts-the-actual-requirements
#19
Nikki Cornell, Michael Eisenhut, Stalin Ramprakash
BACKGROUND: Various different formulae are used to calculate blood transfusion volumes in thalassemia. Using the right formula will avoid iron overload and complications of undertransfusion. OBSERVATIONS: Five years of transfusion data in 11 children with thalassemia showed that no single formula-calculated transfusion volumes accurately. The formula used in the United Kingdom with a hematocrit of the transfused blood of 0.6: (0.4×body weight×desired raise in hemoglobin [g/L]) yielded a volume closest to empirically determined requirements on average...
January 5, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28052950/sepsis-and-siderosis-yersinia-enterocolitica-and-hereditary-haemochromatosis
#20
Phoebe A Thwaites, Marion L Woods
A 60-year-old woman was admitted with sepsis, relative bradycardia, CT evidence of numerous small liver abscesses and 'skin bronzing' consistent with hereditary haemochromatosis (HH). Yersinia enterocolitica O:9 infection was confirmed by serology specimens taken 10 days apart. Iron overload was detected, and homozygous C282Y gene mutation confirmed HH. Liver biopsy revealed grade IV siderosis with micronodular cirrhosis. Haemochromatosis is a common, inherited disorder leading to iron overload that can produce end-organ damage from excess iron deposition...
January 4, 2017: BMJ Case Reports
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