Introduction to Iron Excess
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In a healthy population, iron excess may not be a major concern; however, in persons with high oxidative stress and dyslipidaemia, iron excess may place them at greater risk.
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Indeed, due to the high reactivity with oxygen and the formation of free radicals, iron excess may cause oxidative damage of cells that are extremely vulnerable to this condition because the normal elevated ROS production and the paucity in antioxidant enzyme activities.
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In response, it is becoming increasingly evident that bacteria have evolved Fe2+ efflux pumps to deal with conditions of ferrous iron excess and to prevent intracellular oxidative stress.
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In a healthy population, iron excess may not be a major concern; however, in persons with high oxidative stress and dyslipidaemia, iron excess may place them at greater risk.
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And by extension, targeting miR-let-7d, miR-122, and miR-200 might serve as novel sensitive, specific and non-invasive predictor biomarkers for cellular damage under condition of tissue iron excess.
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The endocrine effects of iron excess have thus far been studied extensively in the pancreas.
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Iron homeostasis is tightly regulated to balance the iron requirement for erythropoiesis and other vital cellular functions, while preventing cellular injury from iron excess.
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Iron excess in tissues results in increased oxidative damage.
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Since iron excess is accompanied by increased expression of iron-storage protein, ferritin, we examined whether ferritin has an effect on the ryanodine receptor - isoform 2 (RYR2), which is one of the major components of Ca2+ signaling.
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The best system revealed that the four human and soya bean ferritins possess a novel function as anti-ageing proteins in conditions of iron excess.
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, neither iron deficiency (ID) nor iron excess was measured.
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Studies on maternal iron status above normal, or iron excess, suggest deleterious effects on infant growth, cognition, and childhood Type 1 diabetes.
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While SLC39A14 imports manganese into the liver and other organs under physiological conditions, it imports iron under conditions of iron excess.
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Only maternal exposure to both iron excess and inflammation, but not either condition alone, causes embryo malformations and demise.
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Mitotracker staining showed that the mitochondrial activity was enriched in ΔferS under both iron excess and iron depletion.
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Phenotyping under different iron concentrations revealed detrimental effects on spore swelling and hyphal formation under iron depletion, but yeast-like morphology under iron excess.
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Indeed, due to the high reactivity with oxygen and the formation of free radicals, iron excess may cause oxidative damage of cells that are extremely vulnerable to this condition because the normal elevated ROS production and the paucity in antioxidant enzyme activities.
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These findings also suggest that if Mɸs are capable of storing iron properly, they have a pronounced ability to withstand iron excess without evoking overt collateral damage and associated insulin resistance that may be age dependent.
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Both SCA and β-thalassemia intermedia present with intra and extravascular hemolysis, and because SCA and β-thalassemia intermedia share features of extravascular hemolysis, macrophage iron excess and anemia we sought to characterize the common features of the PH phenotype, cardiac mechanics, and function as well as lung and right ventricular metabolism.
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Emerging evidence indicates that reduced iron intake and low systemic iron levels are associated with the pathogenesis of colorectal cancer, suggesting that optimal iron intake must be carefully balanced to avoid both iron deficiency and iron excess.
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Parasutterella excrementihominis , Bacteroides vulgatus , and Alistipes finegoldii , were more abundant with the iron excess diet.
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5), iron starvation (bipyridyl) and iron excess (FeCl3), and antibiotic stress (tetracycline and ciprofloxacin).
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By promoting erythropoiesis, EPO influences iron metabolism and induces shifts in iron pool which may ameliorate conditions of free iron excess and iron accumulation.
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Our objective was to get a better understanding of the mechanisms leading to iron excess in HA.
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The increasing prevalence of indiscriminate iron supplementation during pregnancy also raises concerns about the potential adverse effects of iron excess.
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The bone morphogenetic protein (BMP)‐SMAD signaling pathway is a key transcriptional regulator of hepcidin in response to tissue iron stores, serum iron, erythropoietic drive and inflammation to increase the iron supply when needed for erythropoiesis, but to prevent the toxicity of iron excess.
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2), suggesting that iron excess enhanced purine catabolism.
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Due to a lack of iron excretory mechanism, the possibility of iron excess also exists.
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Conversely, hepcidin production is induced by iron loading and inflammation to prevent the toxicity of iron excess and limit its availability to pathogens.
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Iron excess can be prevented or treated but diagnosis is often delayed or missed.
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Objectives
Our prior work demonstrated that dietary iron excess in early life results in iron overload in both liver and hippocampus in pre-weanling piglets.
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We modulated the iron status by adding either the iron chelator Deferoxamine (DFO) for iron deficiency, or ferric ammonium citrate for iron excess, and followed the emergence of developing haematopoietic progenitors.
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More studies are recommended to evaluate the beneficial effects of quercetin with iron excess.
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OBJECTIVE
We hypothesized that early-life iron excess causes systemic and central nervous system iron overload, and compromises social behavior.
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Here Lim and colleagues show that iron excess activates Nrf2 via mitochondrial reactive oxygen species, enhancing the expression of Bmp6 in liver sinusoidal endothelial cells, which in turn promotes hepcidin expression by hepatocytes, decreasing systemic iron levels.
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The role of multiple transfusions in formation of iron excess in patients with myelodysplastic syndrome was demonstrated.
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Objective
To investigate the effects of stress caused by iron excess on biologic activity of murine myoblast C2C12 cells and related mechanism.
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solanacearum density after corn coincided with the high ratio of fluorescent pseudomonads, endospores, and actinomycetes, being most clear in the poor soils (Wardan) and less clear under iron excess at Ganoub El-Tahrir as well as the clay soils.
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Iron excess, typically because of genetic defects, can cause toxicity to tissues and, like iron deficiency, impair wound and injury repair.
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Considering that iron excess is able to negatively alter the microbiome, the use of alginate as a food supplement could be useful in colonic-iron chelation.
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While chronic hepatitis C virus infection drives deficiencies in micronutrients such as zinc, selenium, vitamin A and B12, it also stimulates copper and iron excess; these micronutrients influence antioxidant, inflammatory and immune responses to HCV.
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Because of the serious neurologic consequences of iron deficiency and iron excess in the brain, interest in the iron status of the central nervous system has increased significantly in the past decade.
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Hemochromatoses, mostly but not exclusively related to the HFE gene, correspond to systemic iron overload of genetic origin in which iron excess is the consequence of hepcidin deficiency, hepcidin being the hormone regulating negatively plasma iron.
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ObjectivesThis study was conducted to establish a method for early, quick and cheap screening of iron excess tolerance in rice (Oryza sativa L.
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Besides, iron excess also increased enteritis morbidity and impaired immune function of fish under infection of A.
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EXCESS OF IRON ON THE DEVELOPMENT OF CITRUS ROOTSTOCKS ABSTRACT: The objective of this work was evaluated the effects of iron excess on the emergence and initial development of citrus rootstock genotypes.
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The sexes were analysed separately as morbidity due to iron excess occurs later in women.
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We conclude that hepatocellular iron excess does not aggravate diet-induced steatosis to steatohepatitis or early liver fibrosis in mouse models of hereditary hemochromatosis, irrespectively of the presence or lack of Hfe.
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Iron excess increases the hepatic expression of hepcidin, the systemic iron metabolism regulator that favors iron sequestration in the spleen.
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Conclusions
Hepcidin-induced ferroportin degradation is hypo-responsive to iron excess in a nursing pig model.
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Although the mechanistic association to diet-linked etiologies can be complicated, the stress sentinels are pivotally involved in the pathological processes of secondary hemochromatosis in response to iron excess and other external stresses.
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This “remagnetization” phenomenon is observed under specific pathways only, involves the ferritin protein, and seems linked to a detoxification mechanism in case of iron excess.
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