Role of iron homeostasis in the heart

Herz ◽  
2021 ◽  
Author(s):  
Hangying Ying ◽  
Zhida Shen ◽  
Jiacheng Wang ◽  
Binquan Zhou
Keyword(s):  
Iron Homeostasis

The role of iron homeostasis in adipocyte metabolism

2021 ◽  
Author(s):  
Wan Ma ◽  
Li Jia ◽  
Qingqing Xiong ◽  
Yunfei Feng ◽  
Huahua Du
Keyword(s):  
Adipose Tissue ◽  
Energy Supply ◽  
Iron Homeostasis ◽  
Vital Role ◽  
Physiological Functions ◽  
The One

Iron plays a vital role in the metabolism of adipose tissue. On the one hand, iron is essential for differentiation, endocrine, energy supply and other physiological functions of adipocyte. Iron...

scholarly journals Erythrocytes: Central Actors in Multiple Scenes of Atherosclerosis

2021 ◽  
Vol 22 (11) ◽  
pp. 5843
Author(s):  
Chloé Turpin ◽  
Aurélie Catan ◽  
Olivier Meilhac ◽  
Emmanuel Bourdon ◽  
François Canonne-Hergaux ◽  
...  
Keyword(s):  
Iron Homeostasis ◽  
The Body ◽  
Diabetic Patients ◽  
Special Focus ◽  
Plaque Progression ◽  
Cell Dysfunction ◽  
Circulating Cells ◽  
The Impact ◽  
Progression Of Atherosclerosis

The development and progression of atherosclerosis (ATH) involves lipid accumulation, oxidative stress and both vascular and blood cell dysfunction. Erythrocytes, the main circulating cells in the body, exert determinant roles in the gas transport between tissues. Erythrocytes have long been considered as simple bystanders in cardiovascular diseases, including ATH. This review highlights recent knowledge concerning the role of erythrocytes being more than just passive gas carriers, as potent contributors to atherosclerotic plaque progression. Erythrocyte physiology and ATH pathology is first described. Then, a specific chapter delineates the numerous links between erythrocytes and atherogenesis. In particular, we discuss the impact of extravasated erythrocytes in plaque iron homeostasis with potential pathological consequences. Hyperglycaemia is recognised as a significant aggravating contributor to the development of ATH. Then, a special focus is made on glycoxidative modifications of erythrocytes and their role in ATH. This chapter includes recent data proposing glycoxidised erythrocytes as putative contributors to enhanced atherothrombosis in diabetic patients.

scholarly journals Role of hepcidin in oxidative stress and cell death of cultured mouse renal collecting duct cells: protection against iron and sensitization to cadmium

2021 ◽  
Author(s):  
Stephanie Probst ◽  
Johannes Fels ◽  
Bettina Scharner ◽  
Natascha A. Wolff ◽  
Eleni Roussa ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Cell Death ◽  
Cell Fate ◽  
Catalase Activity ◽  
Metal Ion ◽  
Iron Homeostasis ◽  
Collecting Duct ◽  
Duct Cell ◽  
Plasmid Transfection

AbstractThe liver hormone hepcidin regulates systemic iron homeostasis. Hepcidin is also expressed by the kidney, but exclusively in distal nephron segments. Several studies suggest hepcidin protects against kidney damage involving Fe2+ overload. The nephrotoxic non-essential metal ion Cd2+ can displace Fe2+ from cellular biomolecules, causing oxidative stress and cell death. The role of hepcidin in Fe2+ and Cd2+ toxicity was assessed in mouse renal cortical [mCCD(cl.1)] and inner medullary [mIMCD3] collecting duct cell lines. Cells were exposed to equipotent Cd2+ (0.5–5 μmol/l) and/or Fe2+ (50–100 μmol/l) for 4–24 h. Hepcidin (Hamp1) was transiently silenced by RNAi or overexpressed by plasmid transfection. Hepcidin or catalase expression were evaluated by RT-PCR, qPCR, immunoblotting or immunofluorescence microscopy, and cell fate by MTT, apoptosis and necrosis assays. Reactive oxygen species (ROS) were detected using CellROX™ Green and catalase activity by fluorometry. Hepcidin upregulation protected against Fe2+-induced mIMCD3 cell death by increasing catalase activity and reducing ROS, but exacerbated Cd2+-induced catalase dysfunction, increasing ROS and cell death. Opposite effects were observed with Hamp1 siRNA. Similar to Hamp1 silencing, increased intracellular Fe2+ prevented Cd2+ damage, ROS formation and catalase disruption whereas chelation of intracellular Fe2+ with desferrioxamine augmented Cd2+ damage, corresponding to hepcidin upregulation. Comparable effects were observed in mCCD(cl.1) cells, indicating equivalent functions of renal hepcidin in different collecting duct segments. In conclusion, hepcidin likely binds Fe2+, but not Cd2+. Because Fe2+ and Cd2+ compete for functional binding sites in proteins, hepcidin affects their free metal ion pools and differentially impacts downstream processes and cell fate.

scholarly journals Double-edge sword roles of iron in driving energy production versus instigating ferroptosis

2022 ◽  
Vol 13 (1) ◽  
Author(s):  
Shuping Zhang ◽  
Wei Xin ◽  
Gregory J. Anderson ◽  
Ruibin Li ◽  
Ling Gao ◽  
...  
Keyword(s):  
Fenton Reaction ◽  
Energy Production ◽  
Iron Homeostasis ◽  
Regulated Cell Death ◽  
Double Edge ◽  
Double Edge Sword ◽  
Novel Interactions ◽  
Metabolic Activities ◽  
Species Production

AbstractIron is vital for many physiological functions, including energy production, and dysregulated iron homeostasis underlies a number of pathologies. Ferroptosis is a recently recognized form of regulated cell death that is characterized by iron dependency and lipid peroxidation, and this process has been reported to be involved in multiple diseases. The mechanisms underlying ferroptosis are complex, and involve both well-described pathways (including the iron-induced Fenton reaction, impaired antioxidant capacity, and mitochondrial dysfunction) and novel interactions linked to cellular energy production. In this review, we examine the contribution of iron to diverse metabolic activities and their relationship to ferroptosis. There is an emphasis on the role of iron in driving energy production and its link to ferroptosis under both physiological and pathological conditions. In conclusion, excess reactive oxygen species production driven by disordered iron metabolism, which induces Fenton reaction and/or impairs mitochondrial function and energy metabolism, is a key inducer of ferroptosis.

Dysregulation of iron homeostasis in the CNS and the role of ferroptosis in neurodegenerative disorders

2021 ◽  
Author(s):  
Samuel David ◽  
Priya Jhelum ◽  
Fari Ryan ◽  
Suh Young Jeong ◽  
Antje Kroner
Keyword(s):  
Neurodegenerative Disorders ◽  
Iron Homeostasis

scholarly journals Further insights into the role of bHLH121 in the regulation of iron homeostasis in Arabidopsis thaliana

2020 ◽  
Vol 15 (10) ◽  
pp. 1795582
Author(s):  
Fei Gao ◽  
Kevin Robe ◽  
Christian Dubos
Keyword(s):  
Arabidopsis Thaliana ◽  
Iron Homeostasis

scholarly journals Exploring the Use of Dimethyl Fumarate as Microglia Modulator for Neurodegenerative Diseases Treatment

Antioxidants ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 700
Author(s):  
Maria Rosito ◽  
Claudia Testi ◽  
Giacomo Parisi ◽  
Barbara Cortese ◽  
Paola Baiocco ◽  
...  
Keyword(s):  
Neurodegenerative Diseases ◽  
Iron Homeostasis ◽  
Brain Injuries ◽  
Neuroprotective Effect ◽  
Redox Homeostasis ◽  
Dimethyl Fumarate ◽  
Redox Balance ◽  
Fumaric Acid Ester ◽  
The Central Nervous System

The maintenance of redox homeostasis in the brain is critical for the prevention of the development of neurodegenerative diseases. Drugs acting on brain redox balance can be promising for the treatment of neurodegeneration. For more than four decades, dimethyl fumarate (DMF) and other derivatives of fumaric acid ester compounds have been shown to mitigate a number of pathological mechanisms associated with psoriasis and relapsing forms of multiple sclerosis (MS). Recently, DMF has been shown to exert a neuroprotective effect on the central nervous system (CNS), possibly through the modulation of microglia detrimental actions, observed also in multiple brain injuries. In addition to the hypothesis that DMF is linked to the activation of NRF2 and NF-kB transcription factors, the neuroprotective action of DMF may be mediated by the activation of the glutathione (GSH) antioxidant pathway and the regulation of brain iron homeostasis. This review will focus on the role of DMF as an antioxidant modulator in microglia processes and on its mechanisms of action in the modulation of different pathways to attenuate neurodegenerative disease progression.

scholarly journals Iron Redox Chemistry and Implications in the Parkinson’s Disease Brain

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Dinendra L. Abeyawardhane ◽  
Heather R. Lucas
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Iron Homeostasis ◽  
Substantia Nigra Pars Compacta ◽  
Biochemical Alterations ◽  
Redox Active ◽  
Cellular Inclusions ◽  
Iron Redox ◽  
Presynaptic Protein

The etiology of Parkinson’s disease (PD) is linked with cellular inclusions in the substantia nigra pars compacta region of the brain that are enriched in the misfolded presynaptic protein α-synuclein (αS) and death of the dopaminergic neurons. Brain iron homeostasis governs both neurotransmission and neurodegeneration; hence, the role of iron in PD progression and neuronal health is apparent. Elevated iron deposits become prevalent in the cerebral region upon aging and even more so in the PD brain. Structural as well as oxidative modifications can result from coordination of αS with redox active iron, which could have functional and/or pathological implications. In this review, we will discuss iron-mediated αS aggregation, alterations in iron metabolism, and the role of the iron-dopamine couple. Moreover, iron interactions with N-terminally acetylated αS, the physiologically relevant form of the human protein, will be addressed to shed light on the current understanding of protein dynamics and the physiological environment in the disease state. Oxidative pathways and biochemical alterations resulting from aberrant iron-induced chemistry are the principal focus of this review in order to highlight the plethora of research that has uncovered this emerging dichotomy of iron playing both functional and disruptive roles in PD pathology.

scholarly journals Diabetes inHFEHemochromatosis

2017 ◽  
Vol 2017 ◽  
pp. 1-16 ◽  
Author(s):  
James C. Barton ◽  
Ronald T. Acton
Keyword(s):  
Type 2 Diabetes ◽  
Serum Ferritin ◽  
Iron Homeostasis ◽  
Reference Range ◽  
Clinical Manifestations ◽  
Diabetes Type 2 ◽  
Diabetes Risk ◽  
European Descent

Diabetes in whites of European descent with hemochromatosis was first attributed to pancreatic siderosis. Later observations revealed that the pathogenesis of diabetes inHFEhemochromatosis is multifactorial and its clinical manifestations are heterogeneous. Increased type 2 diabetes risk inHFEhemochromatosis is associated with one or more factors, including abnormal iron homeostasis and iron overload, decreased insulin secretion, cirrhosis, diabetes in first-degree relatives, increased body mass index, insulin resistance, and metabolic syndrome. In p.C282Y homozygotes, serum ferritin, usually elevated at hemochromatosis diagnosis, largely reflects body iron stores but not diabetes risk. In persons with diabetes type 2 without hemochromatosis diagnoses, serum ferritin levels are higher than those of persons without diabetes, but most values are within the reference range. Phlebotomy therapy to achieve iron depletion does not improve diabetes control in all persons withHFEhemochromatosis. The prevalence of type 2 diabetes diagnosed today in whites of European descent with and withoutHFEhemochromatosis is similar. Routine iron phenotyping orHFEgenotyping of patients with type 2 diabetes is not recommended. Herein, we review diabetes inHFEhemochromatosis and the role of iron in diabetes pathogenesis in whites of European descent with and withoutHFEhemochromatosis.

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