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Takahashi A. Zinc Supplementation Enhances the Hematopoietic Activity of Erythropoiesis-Stimulating Agents but Not Hypoxia-Inducible Factor-Prolyl Hydroxylase Inhibitors. Nutrients 2024; 16:520. [PMID: 38398842 PMCID: PMC10893400 DOI: 10.3390/nu16040520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 02/07/2024] [Accepted: 02/12/2024] [Indexed: 02/25/2024] Open
Abstract
Since zinc is involved in many aspects of the hematopoietic process, zinc supplementation can reduce erythropoiesis-stimulating agents (ESAs) in patients undergoing hemodialysis. However, it remains unclear whether hypoxia-inducible factor-prolyl hydroxylase inhibitors (HIF-PHIs) have similar reduction effects. HIF-PHI stabilizes HIF, which promotes hematopoiesis, although HIF-1α levels are downregulated by zinc. This study aimed to investigate the effect of zinc supplementation on the hematopoietic effect of HIF-PHI in patients undergoing hemodialysis. Thirty patients undergoing maintenance hemodialysis who underwent periods of treatment with roxadustat or darbepoetin alfa during the past 3 years were retrospectively observed. Participants who underwent periods with and without zinc supplementation were selected, with nine treated with darbepoetin alfa and nine treated with roxadustat. Similarly to the ESA responsiveness index (ERI), the hematopoietic effect of zinc supplementation was determined by the HIF-PHI responsiveness index (HRI), which was calculated by dividing the HIF-PHI dose (mg/week) by the patient's dry weight (kg) and hemoglobin level (g/L). Zinc supplementation significantly increased ERI (p < 0.05), but no significant change was observed (p = 0.931) in HRI. Although zinc supplementation did not significantly affect HRI, adequate zinc supplementation is required to alleviate concerns such as vascular calcification and increased serum copper during the use of HIF-PHI.
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Affiliation(s)
- Akira Takahashi
- Dialysis Center, Tesseikai Neurosurgical Hospital, Shijonawate 575-8511, Japan
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2
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Fantin J, Toutain J, Pérès EA, Bernay B, Mehani SM, Helaine C, Bourgeois M, Brunaud C, Chazalviel L, Pontin J, Corroyer-Dulmont A, Valable S, Cherel M, Bernaudin M. Assessment of hypoxia and oxidative-related changes in a lung-derived brain metastasis model by [ 64Cu][Cu(ATSM)] PET and proteomic studies. EJNMMI Res 2023; 13:102. [PMID: 38006431 PMCID: PMC10676347 DOI: 10.1186/s13550-023-01052-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 11/19/2023] [Indexed: 11/27/2023] Open
Abstract
BACKGROUND Brain metastases (BM) are the most frequent malignant brain tumors. The aim of this study was to characterize the tumor microenvironment (TME) of BM and particularly hypoxia and redox state, known to play a role in tumor growth and treatment resistance with multimodal PET and MRI imaging, immunohistochemical and proteomic approaches in a human lung cancer (H2030-BrM3)-derived BM model in rats. RESULTS First, in vitro studies confirmed that H2030-BrM3 cells respond to hypoxia with increasing expression of HIF-1, HIF-2 and their target genes. Proteomic analyses revealed, among expression changes, proteins associated with metabolism, oxidative stress, metal response and hypoxia signaling in particular in cortical BM. [64Cu][Cu(ATSM)] PET revealed a significant uptake by cortical BM (p < 0.01), while no uptake is observed in striatal BM 23 days after tumor implantation. Pimonidazole, HIF-1α, HIF-2α, CA-IX as well as GFAP, CTR1 and DMT1 immunostainings are positive in both BM. CONCLUSION Overall, [64Cu][Cu(ATSM)] imaging and proteomic results showed the presence of hypoxia and protein expression changes linked to hypoxia and oxidative stress in BM, which are more pronounced in cortical BM compared to striatal BM. Moreover, it emphasized the interest of [64Cu][Cu(ATSM)] PET to characterize TME of BM and depict inter-metastasis heterogeneity that could be useful to guide treatments.
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Affiliation(s)
- Jade Fantin
- Université de Caen Normandie, CNRS, Normandie Univ., ISTCT UMR6030, GIP CYCERON, F-14000, Caen, France
| | - Jérôme Toutain
- Université de Caen Normandie, CNRS, Normandie Univ., ISTCT UMR6030, GIP CYCERON, F-14000, Caen, France
| | - Elodie A Pérès
- Université de Caen Normandie, CNRS, Normandie Univ., ISTCT UMR6030, GIP CYCERON, F-14000, Caen, France
| | - Benoit Bernay
- Université de Caen Normandie, Normandie Univ., US EMerode, Plateforme Proteogen, F-14000, Caen, France
| | - Sarina Maya Mehani
- Université de Caen Normandie, CNRS, Normandie Univ., ISTCT UMR6030, GIP CYCERON, F-14000, Caen, France
| | - Charly Helaine
- Université de Caen Normandie, CNRS, Normandie Univ., ISTCT UMR6030, GIP CYCERON, F-14000, Caen, France
| | - Mickael Bourgeois
- CRCI2NA, INSERM UMR1307, CNRS-ERL6075, Université d'Angers, Université de Nantes, F-44000, Nantes, France
- GIP ARRONAX, F-44800, Saint-Herblain, France
| | - Carole Brunaud
- Université de Caen Normandie, CNRS, Normandie Univ., ISTCT UMR6030, GIP CYCERON, F-14000, Caen, France
| | - Laurent Chazalviel
- Université de Caen Normandie, CNRS, Normandie Univ., ISTCT UMR6030, GIP CYCERON, F-14000, Caen, France
| | - Julien Pontin
- Université de Caen Normandie, Normandie Univ., US EMerode, Plateforme Proteogen, F-14000, Caen, France
| | - Aurélien Corroyer-Dulmont
- Université de Caen Normandie, CNRS, Normandie Univ., ISTCT UMR6030, GIP CYCERON, F-14000, Caen, France
- Medical Physics Department, CLCC François Baclesse, F-14000, Caen, France
| | - Samuel Valable
- Université de Caen Normandie, CNRS, Normandie Univ., ISTCT UMR6030, GIP CYCERON, F-14000, Caen, France
| | - Michel Cherel
- CRCI2NA, INSERM UMR1307, CNRS-ERL6075, Université d'Angers, Université de Nantes, F-44000, Nantes, France
- GIP ARRONAX, F-44800, Saint-Herblain, France
| | - Myriam Bernaudin
- Université de Caen Normandie, CNRS, Normandie Univ., ISTCT UMR6030, GIP CYCERON, F-14000, Caen, France.
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3
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Takahashi A. Co-Administration of Roxadustat and Zinc Stabilizes Both Serum Copper and Zinc Concentrations in Patients Undergoing Hemodialysis. Nutrients 2023; 15:4887. [PMID: 38068745 PMCID: PMC10708076 DOI: 10.3390/nu15234887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 11/20/2023] [Accepted: 11/21/2023] [Indexed: 12/18/2023] Open
Abstract
Patients undergoing hemodialysis often require zinc supplementation owing to hypozincemia, which may reduce serum copper concentrations. However, hypoxia-inducible factor-prolyl hydroxylase inhibitors (HIF-PHIs), which are used to treat renal anemia, have been reported to increase serum copper. Therefore, this study investigates the effectiveness of a combination of HIF-PHIs and zinc for the stabilization of serum copper and zinc concentrations during zinc supplementation for patients undergoing hemodialysis with renal anemia and hypozincemia. The serum zinc and copper concentrations were retrospectively compared over an 8-month period in 20 patients being administered roxadustat (an HIF-PHI) and 20 controls. The changes in concentrations were tracked in participants taking roxadustat who initiated or increased zinc supplementation. The serum zinc concentrations of the participants were significantly higher (p < 0.001) during zinc supplementation, regardless of roxadustat administration. Post-roxadustat, the serum copper concentrations were significantly higher than those pre-roxadustat or in non-roxadustat-treated participants, irrespective of zinc supplementation (p < 0.005). Even post-roxadustat, the serum copper concentrations were significantly lower, with no increase during zinc supplementation (p < 0.040). When zinc supplementation was initiated or increased in participants taking roxadustat, copper and zinc concentrations were normalized. Thus, combining zinc supplementation with roxadustat prevents both an excessive increase in serum copper and a decrease in serum zinc.
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Affiliation(s)
- Akira Takahashi
- Dialysis Center, Tesseikai Neurosurgical Hospital, 28-1 Nakanohonmachi, Shijonawate 575-8511, Japan
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4
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The Vhl E3 ubiquitin ligase complex regulates melanisation via sima, cnc and the copper import protein Ctr1A. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2021; 1868:119022. [PMID: 33775798 DOI: 10.1016/j.bbamcr.2021.119022] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 03/04/2021] [Accepted: 03/22/2021] [Indexed: 01/22/2023]
Abstract
VHL encodes a tumour suppressor, which possesses E3 ubiquitin ligase activity in complex with EloC and Cul2. In tumour cells or in response to hypoxia, VHL activity is lost, causing accumulation of the transcription factor HIF-1alpha. In this study, we demonstrated that in Drosophila, Rpn9, a regulatory component of the 26 s proteasome, participates in the Vhl-induced proteasomal degradation of sima, the Drosophila orthologue of HIF-1alpha. Knockdown of Vhl induces increased melanisation in the adult fly thorax and concurrent decrease in pigmentation in the abdomen. Both these defects are rescued by knockdown of sima and partially by knockdown of cnc, which encodes the fly orthologue of the transcription factor Nrf2, the master regulator of oxidative stress response. We further show that sima overexpression and Rpn9 knockdown both result in post-translational down-regulation of the copper uptake transporter Ctr1A in the fly eye and that Ctr1A expression exacerbates Vhl knockdown defects in the thorax and rescues these defects in the abdomen. We conclude that Vhl negatively regulates both sima and cnc and that in the absence of Vhl, these transcription factors interact to regulate Ctr1A, copper uptake and consequently melanin formation. We propose a model whereby the co-regulatory relationship between sima and cnc flips between thorax and abdomen: in the thorax, sima is favoured leading to upregulation of Ctr1A; in the abdomen, cnc dominates, resulting in the post-translational downregulation of Ctr1A.
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5
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Jończy A, Mazgaj R, Starzyński RR, Poznański P, Szudzik M, Smuda E, Kamyczek M, Lipiński P. Relationship between Down-Regulation of Copper-Related Genes and Decreased Ferroportin Protein Level in the Duodenum of Iron-Deficient Piglets. Nutrients 2020; 13:nu13010104. [PMID: 33396831 PMCID: PMC7823587 DOI: 10.3390/nu13010104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/26/2020] [Accepted: 12/27/2020] [Indexed: 12/14/2022] Open
Abstract
In mammals, 2 × 1012 red blood cells (RBCs) are produced every day in the bone marrow to ensure a constant supply of iron to maintain effective erythropoiesis. Impaired iron absorption in the duodenum and inefficient iron reutilization from senescent RBCs by macrophages contribute to the development of anemia. Ferroportin (Fpn), the only known cellular iron exporter, as well as hephaestin (Heph) and ceruloplasmin, two copper-dependent ferroxidases involved in the above-mentioned processes, are key elements of the interaction between copper and iron metabolisms. Crosslinks between these metals have been known for many years, but metabolic effects of one on the other have not been elucidated to date. Neonatal iron deficiency anemia in piglets provides an interesting model for studying this interplay. In duodenal enterocytes of young anemic piglets, we identified iron deposits and demonstrated increased expression of ferritin with a concomitant decline in both Fpn and Heph expression. We postulated that the underlying mechanism involves changes in copper distribution within enterocytes as a result of decreased expression of the copper transporter—Atp7b. Obtained results strongly suggest that regulation of iron absorption within enterocytes is based on the interaction between proteins of copper and iron metabolisms and outcompetes systemic regulation.
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Affiliation(s)
- Aneta Jończy
- Department of Molecular Biology, Institute of Genetics and Animal Biotechnology, PAS, 05-552 Jastrzębiec, Poland; (R.M.); (R.R.S.); (M.S.); (E.S.)
- Correspondence: (A.J.); (P.L.); Tel.: +48-227-367-058 (A.J.); +48-227-367-046 (P.L.)
| | - Rafał Mazgaj
- Department of Molecular Biology, Institute of Genetics and Animal Biotechnology, PAS, 05-552 Jastrzębiec, Poland; (R.M.); (R.R.S.); (M.S.); (E.S.)
| | - Rafał Radosław Starzyński
- Department of Molecular Biology, Institute of Genetics and Animal Biotechnology, PAS, 05-552 Jastrzębiec, Poland; (R.M.); (R.R.S.); (M.S.); (E.S.)
| | - Piotr Poznański
- Department of Experimental Genomics, Institute of Genetics and Animal Biotechnology, PAS, 05-552 Jastrzębiec, Poland;
| | - Mateusz Szudzik
- Department of Molecular Biology, Institute of Genetics and Animal Biotechnology, PAS, 05-552 Jastrzębiec, Poland; (R.M.); (R.R.S.); (M.S.); (E.S.)
| | - Ewa Smuda
- Department of Molecular Biology, Institute of Genetics and Animal Biotechnology, PAS, 05-552 Jastrzębiec, Poland; (R.M.); (R.R.S.); (M.S.); (E.S.)
| | - Marian Kamyczek
- Pig Hybridization Centre, National Research Institute of Animal Production, 64-122 Pawłowice, Poland;
| | - Paweł Lipiński
- Department of Molecular Biology, Institute of Genetics and Animal Biotechnology, PAS, 05-552 Jastrzębiec, Poland; (R.M.); (R.R.S.); (M.S.); (E.S.)
- Correspondence: (A.J.); (P.L.); Tel.: +48-227-367-058 (A.J.); +48-227-367-046 (P.L.)
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Berry T, Abohamza E, Moustafa AA. A disease-modifying treatment for Alzheimer's disease: focus on the trans-sulfuration pathway. Rev Neurosci 2020; 31:319-334. [PMID: 31751299 DOI: 10.1515/revneuro-2019-0076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 08/31/2019] [Indexed: 12/16/2022]
Abstract
High homocysteine levels in Alzheimer's disease (AD) result from low activity of the trans-sulfuration pathway. Glutathione levels are also low in AD. L-cysteine is required for the synthesis of glutathione. The synthesis of coenzyme A (CoA) requires L-cysteine, which is synthesized via the trans-sulfuration pathway. CoA is required for the synthesis of acetylcholine and appropriate cholinergic neurotransmission. L-cysteine is required for the synthesis of molybdenum-containing proteins. Sulfite oxidase (SUOX), which is a molybdenum-containing protein, could be dysregulated in AD. SUOX detoxifies the sulfites. Glutaminergic neurotransmission could be dysregulated in AD due to low levels of SUOX and high levels of sulfites. L-cysteine provides sulfur for iron-sulfur clusters. Oxidative phosphorylation (OXPHOS) is heavily dependent on iron-sulfur proteins. The decrease in OXPHOS seen in AD could be due to dysregulations of the trans-sulfuration pathway. There is a decrease in aconitase 1 (ACO1) in AD. ACO1 is an iron-sulfur enzyme in the citric acid cycle that upon loss of an iron-sulfur cluster converts to iron regulatory protein 1 (IRP1). With the dysregulation of iron-sulfur cluster formation ACO1 will convert to IRP1 which will decrease the 2-oxglutarate synthesis dysregulating the citric acid cycle and also dysregulating iron metabolism. Selenomethionine is also metabolized by the trans-sulfuration pathway. With the low activity of the trans-sulfuration pathway in AD selenoproteins will be dysregulated in AD. Dysregulation of selenoproteins could lead to oxidant stress in AD. In this article, we propose a novel treatment for AD that addresses dysregulations resulting from low activity of the trans-sulfuration pathway and low L-cysteine.
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Affiliation(s)
- Thomas Berry
- School of Social Sciences and Psychology, Western Sydney University, 2 Bullecourt Ave, Milperra, 2214 Sydney, New South Wales, Australia
| | - Eid Abohamza
- Department of Social Sciences, College of Arts and Sciences, Qatar University, Doha, Qatar
| | - Ahmed A Moustafa
- School of Social Sciences and Psychology, Western Sydney University, 2 Bullecourt Ave, Milperra, 2214 Sydney, New South Wales, Australia
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7
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Pérès EA, Toutain J, Paty LP, Divoux D, Ibazizène M, Guillouet S, Barré L, Vidal A, Cherel M, Bourgeois M, Bernaudin M, Valable S. 64Cu-ATSM/ 64Cu-Cl 2 and their relationship to hypoxia in glioblastoma: a preclinical study. EJNMMI Res 2019; 9:114. [PMID: 31858290 PMCID: PMC6923301 DOI: 10.1186/s13550-019-0586-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 12/10/2019] [Indexed: 12/11/2022] Open
Abstract
Background Diacetyl-bis(N4-methylthiosemicarbazone), labeled with 64Cu (64Cu-ATSM) has been suggested as a promising tracer for imaging hypoxia. However, various controversial studies highlighted potential pitfalls that may disable its use as a selective hypoxic marker. They also highlighted that the results may be tumor location dependent. Here, we first analyzed uptake of Cu-ATSM and its less lipophilic counterpart Cu-Cl2 in the tumor over time in an orthotopic glioblastoma model. An in vitro study was also conducted to investigate the hypoxia-dependent copper uptake in tumor cells. We then further performed a comprehensive ex vivo study to compare 64Cu uptake to hypoxic markers, specific cellular reactions, and also transporter expression. Methods μPET was performed 14 days (18F-FMISO), 15 days (64Cu-ATSM and 64Cu-Cl2), and 16 days (64Cu-ATSM and 64Cu-Cl2) after C6 cell inoculation. Thereafter, the brains were withdrawn for further autoradiography and immunohistochemistry. C6 cells were also grown in hypoxic workstation to analyze cellular uptake of Cu complexes in different oxygen levels. Results In vivo results showed that Cu-ASTM and Cu-Cl2 accumulated in hypoxic areas of the tumors. Cu-ATSM also stained, to a lesser extent, non-hypoxic regions, such as regions of astrogliosis, with high expression of copper transporters and in particular DMT-1 and CTR1, and also characterized by the expression of elevated astrogliosis. In vitro results show that 64Cu-ATSM showed an increase in the uptake only in severe hypoxia at 0.5 and 0.2% of oxygen while for 64Cu-Cl2, the cell retention was significantly increased at 5% and 1% of oxygen with no significant rise at lower oxygen percentages. Conclusion In the present study, we show that Cu-complexes undoubtedly accumulate in hypoxic areas of the tumors. This uptake may be the reflection of a direct dependency to a redox metabolism and also a reflection of hypoxic-induced overexpression of transporters. We also show that Cu-ATSM also stained non-hypoxic regions such as astrogliosis.
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Affiliation(s)
- Elodie A Pérès
- Normandie Univ, UNICAEN, CEA, CNRS, ISTCT/CERVOxy group, GIP Cyceron, Caen, France
| | - Jérôme Toutain
- Normandie Univ, UNICAEN, CEA, CNRS, ISTCT/CERVOxy group, GIP Cyceron, Caen, France
| | - Louis-Paul Paty
- Normandie Univ, UNICAEN, CEA, CNRS, ISTCT/CERVOxy group, GIP Cyceron, Caen, France
| | - Didier Divoux
- Normandie Univ, UNICAEN, CEA, CNRS, ISTCT/CERVOxy group, GIP Cyceron, Caen, France
| | - Méziane Ibazizène
- Normandie Univ, UNICAEN, CEA, CNRS, ISTCT/LDM-TEP group, GIP Cyceron, Caen, France
| | - Stéphane Guillouet
- Normandie Univ, UNICAEN, CEA, CNRS, ISTCT/LDM-TEP group, GIP Cyceron, Caen, France
| | - Louisa Barré
- Normandie Univ, UNICAEN, CEA, CNRS, ISTCT/LDM-TEP group, GIP Cyceron, Caen, France
| | | | - Michel Cherel
- Nantes-Angers Cancer Research Center CRCINA, University of Nantes, INSERM UMR1232, CNRS-ERL6001, Nantes, France.,GIP ARRONAX, Nantes, France.,Nuclear Medicine Department, ICO-René Gauducheau Cancer Center, Saint-Herblain, France
| | - Mickaël Bourgeois
- Nantes-Angers Cancer Research Center CRCINA, University of Nantes, INSERM UMR1232, CNRS-ERL6001, Nantes, France.,GIP ARRONAX, Nantes, France.,Nuclear Medicine Department, University Hospital, Nantes, France
| | - Myriam Bernaudin
- Normandie Univ, UNICAEN, CEA, CNRS, ISTCT/CERVOxy group, GIP Cyceron, Caen, France
| | - Samuel Valable
- Normandie Univ, UNICAEN, CEA, CNRS, ISTCT/CERVOxy group, GIP Cyceron, Caen, France.
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8
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Doguer C, Ha JH, Collins JF. Intersection of Iron and Copper Metabolism in the Mammalian Intestine and Liver. Compr Physiol 2018; 8:1433-1461. [PMID: 30215866 DOI: 10.1002/cphy.c170045] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Iron and copper have similar physiochemical properties; thus, physiologically relevant interactions seem likely. Indeed, points of intersection between these two essential trace minerals have been recognized for many decades, but mechanistic details have been lacking. Investigations in recent years have revealed that copper may positively influence iron homeostasis, and also that iron may antagonize copper metabolism. For example, when body iron stores are low, copper is apparently redistributed to tissues important for regulating iron balance, including enterocytes of upper small bowel, the liver, and blood. Copper in enterocytes may positively influence iron transport, and hepatic copper may enhance biosynthesis of a circulating ferroxidase, ceruloplasmin, which potentiates iron release from stores. Moreover, many intestinal genes related to iron absorption are transactivated by a hypoxia-inducible transcription factor, hypoxia-inducible factor-2α (HIF2α), during iron deficiency. Interestingly, copper influences the DNA-binding activity of the HIF factors, thus further exemplifying how copper may modulate intestinal iron homeostasis. Copper may also alter the activity of the iron-regulatory hormone hepcidin. Furthermore, copper depletion has been noted in iron-loading disorders, such as hereditary hemochromatosis. Copper depletion may also be caused by high-dose iron supplementation, raising concerns particularly in pregnancy when iron supplementation is widely recommended. This review will cover the basic physiology of intestinal iron and copper absorption as well as the metabolism of these minerals in the liver. Also considered in detail will be current experimental work in this field, with a focus on molecular aspects of intestinal and hepatic iron-copper interplay and how this relates to various disease states. © 2018 American Physiological Society. Compr Physiol 8:1433-1461, 2018.
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Affiliation(s)
- Caglar Doguer
- Food Science and Human Nutrition Department, University of Florida, Florida, Gainesville, USA.,Nutrition and Dietetics Department, Namık Kemal University, Tekirdag, Turkey
| | - Jung-Heun Ha
- Food Science and Human Nutrition Department, University of Florida, Florida, Gainesville, USA.,Department of Food and Nutrition, Chosun University Note: Caglar Doguer and Jung-Heun Ha have contributed equally to this work., Gwangju, Korea
| | - James F Collins
- Food Science and Human Nutrition Department, University of Florida, Florida, Gainesville, USA
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9
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Sun C, Zhang Z, Qie J, Wang Y, Qian J, Wang J, Wu J, Li Q, Bai C, Han B, Gao Z, Xu J, Lu D, Jin L, Wang H. Genetic polymorphism of SLC31A1 is associated with clinical outcomes of platinum-based chemotherapy in non-small-cell lung cancer patients through modulating microRNA-mediated regulation. Oncotarget 2018; 9:23860-23877. [PMID: 29844858 PMCID: PMC5963629 DOI: 10.18632/oncotarget.24794] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 02/27/2018] [Indexed: 01/27/2023] Open
Abstract
SLC31A1 is the major transporter for platinum drug intake, its expression correlates with drug disposition and response. In 1004 Chinese NSCLC patients with platinum-based chemotherapy, we investigated the association between SLC31A1 polymorphisms and clinical outcomes. Heterozygotes of rs10759637 at 3′UTR was associated with severe thrombocytopenia (odds ratio [OR]: 2.69; P = 0.012) and shorter overall survival (hazard ratio [HR]: 1.24; P = 0.005). Variant homozygote of rs2233914 was correlated with longer overall survival (hazard ratio [HR]: 0.73; P = 0.008). Haplotype and diplotype of these linked SNPs were associated with hematologic toxicities. In stratification analyses, rs10759637 and rs2233914 consistently correlated with overall survival in specific subgroups such as men, smoker, patients older than 58 years, or with ECOG PS 0-1, or with squamous cell carcinoma. rs10759637 could change the local structure of 3′UTR harboring putative binding sites for hsa-miR-29, whose transfection into 16HBE cells resulted in remarkable suppression of gene expression. The rs10759637 variant significantly correlated with lowered luciferase activity in reporter assays and decreased expression of SLC31A1 transcript in tumorous tissues. The study thereby identified functional polymorphism of SLC31A1 that modulates miRNA-3′UTR interaction and gene expression as potential pharmacogenetic biomarker for clinical outcomes of platinum-based chemotherapy in NSCLC patients.
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Affiliation(s)
- Chang Sun
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China
| | - Zhuojun Zhang
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China
| | - Jingbo Qie
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China
| | - Yi Wang
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China
| | - Ji Qian
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China
| | - Jiucun Wang
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China
| | - Junjie Wu
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China.,Department of Respiratory and Critical Care Medicine, Changhai Hospital, the Second Military Medical University, Shanghai, China
| | - Qiang Li
- Department of Respiratory and Critical Care Medicine, Changhai Hospital, the Second Military Medical University, Shanghai, China
| | - Chunxue Bai
- Department of Pulmonary Medicine, Zhongshan Hospital of Fudan University, Shanghai, China
| | - Baohui Han
- Department of Pneumology, Chest Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Zhiqiang Gao
- Department of Pneumology, Chest Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Jibin Xu
- Department of Cardiothoracic Surgery, Changzheng Hospital of the Second Military Medical University, Shanghai, China
| | - Daru Lu
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China
| | - Li Jin
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China
| | - Haijian Wang
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China
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10
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Bondanese VP, Lamboux A, Simon M, Lafont JE, Albalat E, Pichat S, Vanacker JM, Telouk P, Balter V, Oger P, Albarède F. Hypoxia induces copper stable isotope fractionation in hepatocellular carcinoma, in a HIF-independent manner. Metallomics 2017; 8:1177-1184. [PMID: 27500357 DOI: 10.1039/c6mt00102e] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Hepatocellular carcinoma (HCC) is the most frequent type of primary liver cancer, with increasing incidence worldwide. The unrestrained proliferation of tumour cells leads to tumour hypoxia which in turn promotes cancer aggressiveness. While changes in the concentration of copper (Cu) have long been observed upon cancerization, we have recently reported that the isotopic composition of copper is also altered in several types of cancer. In particular, we showed that in hepatocellular carcinoma, tumour tissue contains heavier copper compared to the surrounding parenchyma. However, the reasons behind such isotopic signature remained elusive. Here we show that hypoxia causes heavy copper enrichment in several human cell lines. We also demonstrate that this effect of hypoxia is pH, HIF-1 and -2 independent. Our data identify a previously unrecognized cellular process associated with hypoxia, and suggests that in vivo tumour hypoxia determines copper isotope fractionation in HCC and other solid cancers.
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Affiliation(s)
- Victor P Bondanese
- Univ Lyon, ENS de Lyon, Université Lyon 1, CNRS, UMR 5276 LGL-TPE, F-69342, Lyon, France.
| | - Aline Lamboux
- Univ Lyon, ENS de Lyon, Université Lyon 1, CNRS, UMR 5276 LGL-TPE, F-69342, Lyon, France.
| | - Melanie Simon
- Univ Lyon, ENS de Lyon, Université Lyon 1, CNRS, UMR 5276 LGL-TPE, F-69342, Lyon, France.
| | - Jérôme E Lafont
- Institute for Biology and Chemistry of Proteins, CNRS, UMR 5305 Laboratory of Tissue Biology and Therapeutic Engineering, Université Claude Bernard-Lyon 1 and University of Lyon, France
| | - Emmanuelle Albalat
- Univ Lyon, ENS de Lyon, Université Lyon 1, CNRS, UMR 5276 LGL-TPE, F-69342, Lyon, France.
| | - Sylvain Pichat
- Univ Lyon, ENS de Lyon, Université Lyon 1, CNRS, UMR 5276 LGL-TPE, F-69342, Lyon, France.
| | - Jean-Marc Vanacker
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Lyon 1, CNRS, Ecole Normale Supérieure de Lyon, 69007 Lyon, France
| | - Philippe Telouk
- Univ Lyon, ENS de Lyon, Université Lyon 1, CNRS, UMR 5276 LGL-TPE, F-69342, Lyon, France.
| | - Vincent Balter
- Univ Lyon, ENS de Lyon, Université Lyon 1, CNRS, UMR 5276 LGL-TPE, F-69342, Lyon, France.
| | - Philippe Oger
- Univ Lyon, ENS de Lyon, Université Lyon 1, CNRS, UMR 5276 LGL-TPE, F-69342, Lyon, France.
| | - Francis Albarède
- Univ Lyon, ENS de Lyon, Université Lyon 1, CNRS, UMR 5276 LGL-TPE, F-69342, Lyon, France.
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11
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Xia Y, Liu L, Bai Q, Long Q, Wang J, Xi W, Xu J, Guo J. Prognostic value of copper transporter 1 expression in patients with clear cell renal cell carcinoma. Oncol Lett 2017; 14:5791-5800. [PMID: 29113209 PMCID: PMC5661472 DOI: 10.3892/ol.2017.6942] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 07/05/2017] [Indexed: 01/16/2023] Open
Abstract
Clear cell renal cell carcinoma (ccRCC) features a Von Hippel-Lindau mutation, associated with a hypoxia-inducible factor (HIF) imbalance. Copper transporter 1 (CTR1) may also promote tumor progression through the modulation of the HIF pathway by copper. Therefore, the present study explored the prognostic effect of tumor CTR1 expression in patients with ccRCC. A total of 293 patients with ccRCC that underwent nephrectomy were retrospectively enrolled. CTR1 expression was assessed by immunohistochemistry, and its association with clinicopathological features and prognosis were evaluated. The present data indicated that high tumor CTR1 expression was independently associated with poor overall survival (OS) [hazard ratio, 2.291; 95% confidence interval (CI), 1.389–3.777; P<0.001] and disease-free survival (DFS) (hazard ratio, 2.210; 95% CI, 1.299–3.759; P=0.003) rates in patients with ccRCC. Furthermore, CTR1 expression was significantly higher for Mayo Clinic stage, size, grade and necrosis score risk groups, and could be incorporated into several existing prognostic models to improve performance. Nomograms incorporating tumor CTR1 expression with other parameters performed well in the 5- and 8-year OS and DFS rate predictions of patients (concordance index 0.805 and 0.787, respectively). In conclusion, the present study demonstrated that CTR1 expression is a potential independent biomarker for poor prognosis for the recurrence and survival prediction of patients with ccRCC following nephrectomy.
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Affiliation(s)
- Yu Xia
- Department of Urology, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Li Liu
- Department of Urology, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Qi Bai
- Department of Urology, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Qilai Long
- Department of Urology, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Jiajun Wang
- Department of Urology, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Wei Xi
- Department of Urology, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Jiejie Xu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, P.R. China
| | - Jianming Guo
- Department of Urology, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
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12
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Decreased expression of CTR2 predicts poor prognosis of patients with clear cell renal cell carcinoma. Urol Oncol 2015; 34:5.e1-9. [PMID: 26411550 DOI: 10.1016/j.urolonc.2015.08.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 07/28/2015] [Accepted: 08/24/2015] [Indexed: 11/21/2022]
Abstract
PURPOSE Clear cell renal cell carcinoma (ccRCC) is well known for its hypervascularity due to the Von Hippel-Lindau/hypoxia-inducible factor dysregulation. Recent findings suggested that copper transporter 2 (CTR2) is also associated with angiogenesis through copper׳s modulation of the hypoxia-inducible factor pathway. Our group thus explored the prognostic role of CTR2 in patients with ccRCC. MATERIALS AND METHODS A total of 331 patients with ccRCC who underwent nephrectomy were enrolled between February 2005 and June 2007 at a single institution. The median follow-up was 98.97 months (2.63-120.47mo). Patients׳ samples were collected and stained for CTR2 by immunohistochemistry. The staining intensity was analyzed quantitatively and defined as high/low expression using X-tile software. Stage, Size, Grade, and Necrosis score and University of California Los Angeles Integrated Staging System score were applied to stratify patients׳ risks. Survival analyses were performed through the Kaplan-Meier method and Cox proportional hazard model. After integrating tumoral CTR2 expression with other clinical parameters, 2 nomograms were generated for overall survival (OS) and disease-free survival (DFS) prediction. RESULTS CTR2 expression in ccRCC was decreased compared with that in the peritumoral tissue (P<0.001) and negatively correlated with many other clinical parameters. In survival analyses using the Kaplan-Meier method, low tumoral CTR2 expression displayed a dismal prognostic effect both in OS and DFS prediction (P<0.001). Multivariate analyses also revealed the same result after adjusted with other clinical parameters (P<0.001). Stratifying patients into 3 risk levels using the Stage, Size, Grade, and Necrosis score and University of California Los Angeles Integrated Staging System score, decreased CTR2 expression associated with shorter OS and DFS in the low- and intermediate-risk groups. Moreover, the generated nomogram integrating tumoral CTR2 expression performed better in predicting patients׳ OS than using TNM stages alone (c-index = 0.799; 95% CI: 0.752-0.846 vs. 0.691; 95% CI: 0.637-0.745). CONCLUSIONS CTR2 is a novel prognostic marker for patients with ccRCC both in OS and DFS prediction, and could be incorporated with other clinical parameters for better patient risk stratification.
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Gulec S, Anderson GJ, Collins JF. Mechanistic and regulatory aspects of intestinal iron absorption. Am J Physiol Gastrointest Liver Physiol 2014; 307:G397-409. [PMID: 24994858 PMCID: PMC4137115 DOI: 10.1152/ajpgi.00348.2013] [Citation(s) in RCA: 202] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Iron is an essential trace mineral that plays a number of important physiological roles in humans, including oxygen transport, energy metabolism, and neurotransmitter synthesis. Iron absorption by the proximal small bowel is a critical checkpoint in the maintenance of whole-body iron levels since, unlike most other essential nutrients, no regulated excretory systems exist for iron in humans. Maintaining proper iron levels is critical to avoid the adverse physiological consequences of either low or high tissue iron concentrations, as commonly occurs in iron-deficiency anemia and hereditary hemochromatosis, respectively. Exquisite regulatory mechanisms have thus evolved to modulate how much iron is acquired from the diet. Systemic sensing of iron levels is accomplished by a network of molecules that regulate transcription of the HAMP gene in hepatocytes, thus modulating levels of the serum-borne, iron-regulatory hormone hepcidin. Hepcidin decreases intestinal iron absorption by binding to the iron exporter ferroportin 1 on the basolateral surface of duodenal enterocytes, causing its internalization and degradation. Mucosal regulation of iron transport also occurs during low-iron states, via transcriptional (by hypoxia-inducible factor 2α) and posttranscriptional (by the iron-sensing iron-regulatory protein/iron-responsive element system) mechanisms. Recent studies demonstrated that these regulatory loops function in tandem to control expression or activity of key modulators of iron homeostasis. In health, body iron levels are maintained at appropriate levels; however, in several inherited disorders and in other pathophysiological states, iron sensing is perturbed and intestinal iron absorption is dysregulated. The iron-related phenotypes of these diseases exemplify the necessity of precisely regulating iron absorption to meet body demands.
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Affiliation(s)
- Sukru Gulec
- 1Food Science & Human Nutrition Department, University of Florida, Gainesville, Florida; and
| | | | - James F. Collins
- 1Food Science & Human Nutrition Department, University of Florida, Gainesville, Florida; and
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Abstract
Given their similar physiochemical properties, it is a logical postulate that iron and copper metabolism are intertwined. Indeed, iron-copper interactions were first documented over a century ago, but the homeostatic effects of one on the other has not been elucidated at a molecular level to date. Recent experimental work has, however, begun to provide mechanistic insight into how copper influences iron metabolism. During iron deficiency, elevated copper levels are observed in the intestinal mucosa, liver, and blood. Copper accumulation and/or redistribution within enterocytes may influence iron transport, and high hepatic copper may enhance biosynthesis of a circulating ferroxidase, which potentiates iron release from stores. Moreover, emerging evidence has documented direct effects of copper on the expression and activity of the iron-regulatory hormone hepcidin. This review summarizes current experimental work in this field, with a focus on molecular aspects of iron-copper interplay and how these interactions relate to various disease states.
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Affiliation(s)
- Sukru Gulec
- Food Science and Human Nutrition Department, University of Florida, Gainesville, Florida 32611;
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15
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Schweigel-Röntgen M. The families of zinc (SLC30 and SLC39) and copper (SLC31) transporters. CURRENT TOPICS IN MEMBRANES 2014; 73:321-55. [PMID: 24745988 DOI: 10.1016/b978-0-12-800223-0.00009-8] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The solute carriers families 30 (SLC30; ZnT), 39 (SLC39; ZIP), and 31 (SLC31; CTR) are involved in the essential maintenance of cellular zinc (Zn²⁺) and copper (Cu²⁺) homeostasis, respectively. ZnTs mediate Zn²⁺ extrusion from cells (SLC30A1) or transport Zn²⁺ into organelles and secretory vesicles/granules (SLC30A2-SLC30A8). SLC39 family members are predominantly localized to the cell membrane where they perform Zn²⁺ uptake and increase the availability of cytosolic Zn²⁺. SLC39A1 is ubiquitously expressed, whereas other ZIP transporters (e.g., SLC39A2 and SLC39A3) show a more tissue-restricted expression consistent with organ-specific functions of these proteins. The members A1 (CTR1) and A2 (CTR2) of the SLC31 family of solute carriers belong to a network of proteins that acts to regulate the intracellular Cu²⁺ concentration within a certain range. SLC31A1 is predominantly localized to the plasma membrane, whereas SLC31A2 is mainly found in intracellular membranes of the late endosome and lysosome. The specific function of SLC31A2 is not known. SLC31A1 is ubiquitously expressed and has been characterized as a high-affinity importer of reduced copper (Cu⁺). Cu²⁺ transport function of CTR proteins is associated with oligomerization; SLC31A1 trimerizes and thereby forms a channel-like structure enabling Cu²⁺ translocation across the cell membrane. The molecular characteristics and structural details (e.g., membrane topology, conserved Zn²⁺, and Cu²⁺ binding sites) and mechanisms of translational and posttranslational regulation of expression and/or activity have been described for SLC30 and SLC39 family members, and for SLC31A1. For SLC31A1, data on tissue-specific functions (e.g., in the intestine, heart, and liver) are also available. A link between SLC31A1, immune function, and disorders such as Alzheimer's disease or cancer makes the protein a candidate therapeutic target. In secretory tissues (e.g., the mammary gland and pancreas), Zn²⁺ transporters of SLC families 30 and 39 are involved in specific functions such as insulin synthesis and secretion, metallation of digestive proenzymes, and transfer of nutrients into milk. Defective or dysregulated Zn²⁺ metabolism in these organs is associated with disorders such as diabetes and cancer, and impaired Zn²⁺ secretion into milk.
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Affiliation(s)
- Monika Schweigel-Röntgen
- Institute for Muscle Biology & Growth, Leibniz Institute for Farm Animal Biology, Dummerstorf, Germany.
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16
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Regulatory effects of Cu, Zn, and Ca on Fe absorption: the intricate play between nutrient transporters. Nutrients 2013; 5:957-70. [PMID: 23519291 PMCID: PMC3705329 DOI: 10.3390/nu5030957] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 03/08/2013] [Accepted: 03/15/2013] [Indexed: 12/21/2022] Open
Abstract
Iron is an essential nutrient for almost every living organism because it is required in a number of biological processes that serve to maintain life. In humans, recycling of senescent erythrocytes provides most of the daily requirement of iron. In addition, we need to absorb another 1–2 mg Fe from the diet each day to compensate for losses due to epithelial sloughing, perspiration, and bleeding. Iron absorption in the intestine is mainly regulated on the enterocyte level by effectors in the diet and systemic regulators accessing the enterocyte through the basal lamina. Recently, a complex meshwork of interactions between several trace metals and regulatory proteins was revealed. This review focuses on advances in our understanding of Cu, Zn, and Ca in the regulation of iron absorption. Ascorbate as an important player is also considered.
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Hasan NM, Lutsenko S. Regulation of copper transporters in human cells. CURRENT TOPICS IN MEMBRANES 2012; 69:137-61. [PMID: 23046650 DOI: 10.1016/b978-0-12-394390-3.00006-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Copper is essential for normal growth and development of human organisms. The role of copper as a cofactor of important metabolic enzymes, such as cytochrome c oxidase, superoxide dismutase, lysyl oxidase, dopamine-β-hydroxylase, and many others, has been well established. In recent years, new regulatory roles of copper have emerged. Accumulating evidence points to the involvement of copper in lipid metabolism, antimicrobial defense, neuronal activity, resistance of tumor cells to platinum-based chemotherapeutic drugs, kinase-mediated signal transduction, and other essential cellular processes. For many of these processes, the precise mechanism of copper action remains to be established. Nevertheless, it is increasingly clear that many regulatory and signaling events are associated with changes in the intracellular localization and abundance of copper transporters, as well as distinct compartmentalization of copper itself. In this review, we discuss current data on regulation of the localization and abundance of copper transporters in response to metabolic and signaling events in human cells. Regulation by kinase-mediated phosphorylation will be addressed along with the emerging area of the redox-driven control of copper transport. We highlight mechanistic questions that await further testing.
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Affiliation(s)
- Nesrin M Hasan
- Department of Physiology, Johns Hopkins University, Baltimore, MD, USA
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