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El Muayed M, Wang JC, Wong WP, Metzger BE, Zumpf KB, Gurra MG, Sponenburg RA, Hayes MG, Scholtens DM, Lowe LP, Lowe WL. Urinary metal profiles in mother-offspring pairs and their association with early dysglycemia in the International Hyperglycemia and Adverse Pregnancy Outcome Follow Up Study (HAPO-FUS). JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2023; 33:855-864. [PMID: 36509832 PMCID: PMC10261541 DOI: 10.1038/s41370-022-00511-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 11/26/2022] [Accepted: 11/28/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Variations in dietary intake and environmental exposure patterns of essential and non-essential trace metals influence many aspects of human health throughout the life span. OBJECTIVE To examine the relationship between urine profiles of essential and non-essential metals in mother-offspring pairs and their association with early dysglycemia. METHODS Herein, we report findings from an ancillary study to the international Hyperglycemia and Adverse Pregnancy Outcome Follow-Up Study (HAPO-FUS) that examined urinary essential and non-essential metal profiles from mothers and offspring ages 10-14 years (1012 mothers, 1013 offspring, 968 matched pairs) from 10 international sites. RESULTS Our analysis demonstrated a diverse exposure pattern across participating sites. In multiple regression modelling, a positive association between markers of early dysglycemia and urinary zinc was found in both mothers and offspring after adjustment for common risk factors for diabetes. The analysis showed weaker, positive, and negative associations of the 2-h glucose value with urinary selenium and arsenic respectively. A positive association between 2-h glucose values and cadmium was found only in mothers in the fully adjusted model when participants with established diabetes were excluded. There was a high degree of concordance between mother and offspring urinary metal profiles. Mother-to-offspring urinary metal ratios were unique for each metal, providing insights into changes in their homeostasis across the lifespan. SIGNIFICANCE Urinary levels of essential and non-essential metals are closely correlated between mothers and their offspring in an international cohort. Urinary levels of zinc, selenium, arsenic, and cadmium showed varying degrees of association with early dysglycemia in a comparatively healthy cohort with a low rate of preexisting diabetes. IMPACT STATEMENT Our data provides novel evidence for a strong correlation between mother and offspring urinary metal patterns with a unique mother-to-offspring ratio for each metal. The study also provides new evidence for a strong positive association between early dysglycemia and urinary zinc, both in mothers and offspring. Weaker positive associations with urinary selenium and cadmium and negative associations with arsenic were also found. The low rate of preexisting diabetes in this population provides the unique advantage of minimizing the confounding effect of preexisting, diabetes related renal changes that would alter the relationship between dysglycemia and renal metal excretion.
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Affiliation(s)
- Malek El Muayed
- Division of Endocrinology, Metabolism and Molecular Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
| | - Janice C Wang
- Division of Endocrinology, Metabolism and Molecular Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Winifred P Wong
- Division of Endocrinology, Metabolism and Molecular Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Boyd E Metzger
- Division of Endocrinology, Metabolism and Molecular Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Katelyn B Zumpf
- Department of Preventive Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Miranda G Gurra
- Department of Preventive Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Rebecca A Sponenburg
- Quantitative Bio-element Imaging Centre, Chemistry of Life Processes Institute, Northwestern University, Evanston, IL, 60208, USA
| | - M Geoffrey Hayes
- Division of Endocrinology, Metabolism and Molecular Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Denise M Scholtens
- Department of Preventive Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Lynn P Lowe
- Department of Preventive Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - William L Lowe
- Division of Endocrinology, Metabolism and Molecular Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
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Ahmad A, Kumari N, Afangbedji N, Nekhai S, Jerebtsova M. Induction of Hepcidin Expression in the Renal Cortex of Sickle Cell Disease Mice. Int J Mol Sci 2023; 24:10806. [PMID: 37445980 PMCID: PMC10341858 DOI: 10.3390/ijms241310806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 06/22/2023] [Accepted: 06/22/2023] [Indexed: 07/15/2023] Open
Abstract
In patients with sickle cell disease (SCD), chronic hemolysis and frequent blood transfusions cause iron overload and accumulation in the kidneys. The iron deposition is found in the renal cortex and correlates with the severity of hemolysis. In this study, we observed a significant accumulation of iron in the renal cortex of a mouse model of SCD, and assessed the expression of the proteins involved in maintaining renal iron homeostasis. Despite the intracellular iron accumulation, the levels of the transferrin receptor in the kidneys were increased, but the levels of the iron exporter ferroportin were not altered in SCD mice. Ferroportin is regulated by hepcidin, which binds to it and promotes its degradation. We found reduced serum hepcidin levels but increased renal hepcidin production in SCD mice. Furthermore, we observed significant macrophage infiltration and increased expression of intercellular adhesion molecule 1 in the endothelial cells of the kidneys in SCD mice. These observations correlated with elevated levels of proinflammatory cytokines IL-1β and IL-6, which can potentially stimulate hepcidin expression. Taken together, our results demonstrate that in individuals with SCD, a renal inflammation state induces renal hepcidin production that blocks the upregulation of ferroportin levels, resulting in dysregulation of iron homeostasis in the kidney and iron deposition in the renal cortex.
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Affiliation(s)
- Asrar Ahmad
- Center for Sickle Cell Disease, Howard University, Washington, DC 20059, USA; (A.A.); (N.K.); (N.A.); (S.N.)
| | - Namita Kumari
- Center for Sickle Cell Disease, Howard University, Washington, DC 20059, USA; (A.A.); (N.K.); (N.A.); (S.N.)
- Department of Microbiology, Howard University, Washington, DC 20059, USA
| | - Nowah Afangbedji
- Center for Sickle Cell Disease, Howard University, Washington, DC 20059, USA; (A.A.); (N.K.); (N.A.); (S.N.)
| | - Sergei Nekhai
- Center for Sickle Cell Disease, Howard University, Washington, DC 20059, USA; (A.A.); (N.K.); (N.A.); (S.N.)
- Department of Microbiology, Howard University, Washington, DC 20059, USA
- Departments of Medicine, Howard University, Washington, DC 20059, USA
| | - Marina Jerebtsova
- Department of Microbiology, Howard University, Washington, DC 20059, USA
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López M, Quintero-Macías L, Huerta M, Rodríguez-Hernández A, Melnikov V, Cárdenas Y, Bricio-Barrios JA, Sánchez-Pastor E, Gamboa-Domínguez A, Leal C, Trujillo X, Ríos-Silva M. Capsaicin Decreases Kidney Iron Deposits and Increases Hepcidin Levels in Diabetic Rats with Iron Overload: A Preliminary Study. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27227764. [PMID: 36431865 PMCID: PMC9695924 DOI: 10.3390/molecules27227764] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/27/2022] [Accepted: 11/09/2022] [Indexed: 11/16/2022]
Abstract
Iron overload (IOL) increases the risk of diabetes mellitus (DM). Capsaicin (CAP), an agonist of transient receptor potential vanilloid-1 (TRPV1), reduces the effects of IOL. We evaluated the effects of chronic CAP administration on hepcidin expression, kidney iron deposits, and urinary biomarkers in a male Wistar rat model with IOL and DM (DM-IOL). IOL was induced with oral administration of iron for 12 weeks and DM was induced with streptozotocin. Four groups were studied: Healthy, DM, DM-IOL, and DM-IOL + CAP (1 mg·kg-1·day-1 for 12 weeks). Iron deposits were visualized with Perls tissue staining and a colorimetric assay. Serum hepcidin levels were measured with an enzyme-linked immunosorbent assay. Kidney biomarkers were assayed in 24 h urine samples. In the DM-IOL + CAP group, the total area of iron deposits and the total iron content in kidneys were smaller than those observed in both untreated DM groups. CAP administration significantly increased hepcidin levels in the DM-IOL group. Urinary levels of albumin, cystatin C, and beta-2-microglobulin were similar in all three experimental groups. In conclusion, we showed that in a DM-IOL animal model, CAP reduced renal iron deposits and increased the level of circulating hepcidin.
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Affiliation(s)
- Marisa López
- University Center of Biomedical Research, Universidad de Colima, Av. 25 de Julio #965, Col. Villas San Sebastian, Colima 28045, Mexico
| | - Laura Quintero-Macías
- Faculty of Medicine, Universidad de Colima, Av. Universidad #333, Col. Las Víboras, Colima 28040, Mexico
| | - Miguel Huerta
- University Center of Biomedical Research, Universidad de Colima, Av. 25 de Julio #965, Col. Villas San Sebastian, Colima 28045, Mexico
| | | | - Valery Melnikov
- Faculty of Medicine, Universidad de Colima, Av. Universidad #333, Col. Las Víboras, Colima 28040, Mexico
| | - Yolitzy Cárdenas
- University Center of Biomedical Research, Universidad de Colima, Av. 25 de Julio #965, Col. Villas San Sebastian, Colima 28045, Mexico
| | | | - Enrique Sánchez-Pastor
- University Center of Biomedical Research, Universidad de Colima, Av. 25 de Julio #965, Col. Villas San Sebastian, Colima 28045, Mexico
| | - Armando Gamboa-Domínguez
- Belisario Domínguez Sección XVI, Pathology Department, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City 14080, Mexico
| | - Caridad Leal
- Centro de Investigaciones Biomédicas de Occidente, Instituto Mexicano del Seguro Social, Sierra Mojada No. 800, Col. Independencia, Guadalajara 44340, Mexico
| | - Xóchitl Trujillo
- University Center of Biomedical Research, Universidad de Colima, Av. 25 de Julio #965, Col. Villas San Sebastian, Colima 28045, Mexico
| | - Mónica Ríos-Silva
- University Center of Biomedical Research, CONACyT-Universidad de Colima, Av. 25 de Julio #965, Col. Villas San Sebastian, Colima 28045, Mexico
- Correspondence: ; Tel./Fax: +52-312-316-1000 (ext. 70557 or 47452)
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Effect of Bis(maltolato)oxovanadium(IV) on Zinc, Copper, and Manganese Homeostasis and DMT1 mRNA Expression in Streptozotocin-Induced Hyperglycemic Rats. BIOLOGY 2022; 11:biology11060814. [PMID: 35741335 PMCID: PMC9219771 DOI: 10.3390/biology11060814] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 05/20/2022] [Accepted: 05/23/2022] [Indexed: 02/07/2023]
Abstract
Our aim was to examine whether vanadium (IV) corrects alterations in zinc, copper and manganese homeostasis, observed in streptozotocin-induced hyperglycemic rats, and whether such changes are related to divalent metal transporter 1 (DMT1) mRNA expression, and antioxidant and proinflammatory parameters. Four groups of Wistar rats were examined: control; hyperglycemic (H); hyperglycemic treated with 1 mg V/day (HV); and hyperglycemic treated with 3 mg V/day (HVH). Vanadium was supplied in drinking water as bis(maltolato)oxovanadium(IV) for five weeks. Zinc, copper and manganese were measured in food, excreta, serum and tissues. DMT1 mRNA expression was quantified in the liver. Hyperglycemic rats showed increased Zn and Cu absorption and content in the liver, serum, kidneys and femurs; DMT1 expression also increased (p < 0.05 in all cases). HV rats showed no changes compared to H rats other than decreased DMT1 expression (p < 0.05). In the HVH group, decreased absorption and tissular content of studied elements (p < 0.05 in all cases) and DMT1 expression compared to H (p < 0.05) were observed. Liver zinc, copper and manganese content correlated positively with glutathione peroxidase activity and negatively with catalase activity (p < 0.05 in both cases). In conclusion, treatment with 3 mg V/d reverted the alterations in zinc and copper homeostasis caused by hyperglycemia, possibly facilitated by decreased DMT1 expression.
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Yin M, Zhou L, Ji Y, Lu R, Ji W, Jiang G, Ma J, Song X. In silico identification and verification of ferroptosis-related genes in type 2 diabetic islets. Front Endocrinol (Lausanne) 2022; 13:946492. [PMID: 35992146 PMCID: PMC9388850 DOI: 10.3389/fendo.2022.946492] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 07/07/2022] [Indexed: 12/20/2022] Open
Abstract
Type 2 diabetes (T2D) is a major global public health burden, with β-cell dysfunction a key component in its pathogenesis. However, the exact pathogenesis of β-cell dysfunction in T2D is yet to be fully elucidated. Ferroptosis, a recently discovered regulated form of non-apoptotic cell death, plays a vital role in the development of diabetes and its complications. The current study aimed to identify the key molecules involved in β-cell ferroptosis3 in patients with T2D using the mRNA expression profile data of GSE25724 by bioinformatic approaches. The differentially expressed mRNAs (DE-mRNAs) in human islets of patients with T2D were screened using the islet mRNA expression profiling data from the Gene Expression Omnibus and their intersection with ferroptosis genes was then obtained. Ferroptosis-related DE-mRNA functional and pathway enrichment analysis in T2D islet were performed. Using a protein-protein interaction (PPI) network constructed from the STRING database, Cytoscape software identified ferroptosis-related hub genes in the T2D islet with a Degree algorithm. We constructed a miRNA-hub gene network using the miRWalk database. We generated a rat model of T2D to assess the expression of hub genes. A total of 1,316 DE-mRNAs were identified in the islet of patients between T2D and non-T2D (NT2D), including 221 and 1,095 up- and down-regulated genes. Gene set enrichment analysis revealed that the ferroptosis-related gene set was significantly different in islets between T2D and NT2D at an overall level. A total of 33 ferroptosis-related DE-mRNAs were identified, most of which were significantly enriched in pathways including ferroptosis. The established PPI network with ferroptosis-related DE-mRNAs identified five hub genes (JUN, NFE2L2, ATG5, KRAS, and HSPA5), and the area under the ROC curve of these five hub genes was 0.929 in the Logistic regression model. We constructed a regulatory network of hub genes and miRNAs, and the results showed that suggesting that hsa-miR-6855-5p, hsa-miR-9985, and hsa-miR-584-5p could regulate most hub genes. In rat model of T2D, the protein expression levels of JUN and NFE2L2 in pancreatic tissues were upregulated and downregulated, respectively. These results contribute to further elucidation of ferroptosis-related molecular mechanisms in the pathogenesis of β-cell dysfunction of T2D.
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Affiliation(s)
- Meiqi Yin
- Department of Endocrinology, Suzhou TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Suzhou, China
| | - Liang Zhou
- Clinical Pharmaceutical Laboratory of Traditional Chinese Medicine, Suzhou TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Suzhou, China
| | - Yanan Ji
- Department of Pharmacology, Nanjing University of Chinese Medicine, Nanjing, China
| | - Rongxin Lu
- Department of Pharmacology, Nanjing University of Chinese Medicine, Nanjing, China
| | - Wei Ji
- Division of Rheumatology, The Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Guorong Jiang
- Clinical Pharmaceutical Laboratory of Traditional Chinese Medicine, Suzhou TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Suzhou, China
| | - Jin Ma
- Department of Pharmacology, Nanjing University of Chinese Medicine, Nanjing, China
- Department of Pharmacy, Children’s Hospital of Soochow University, Suzhou, China
- *Correspondence: Jin Ma, ; Xiudao Song,
| | - Xiudao Song
- Clinical Pharmaceutical Laboratory of Traditional Chinese Medicine, Suzhou TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Suzhou, China
- *Correspondence: Jin Ma, ; Xiudao Song,
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Sánchez-González C, Rivas-García L, Rodríguez-Nogales A, Algieri F, Gálvez J, Aranda P, Montes-Bayón M, Llopis J. Vanadium Decreases Hepcidin mRNA Gene Expression in STZ-Induced Diabetic Rats, Improving the Anemic State. Nutrients 2021; 13:nu13041256. [PMID: 33920401 PMCID: PMC8069891 DOI: 10.3390/nu13041256] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 04/05/2021] [Accepted: 04/08/2021] [Indexed: 12/26/2022] Open
Abstract
Diabetes is a disease with an inflammatory component that courses with an anemic state. Vanadium (V) is an antidiabetic agent that acts by stimulating insulin signaling. Hepcidin blocks the intestinal absorption of iron and the release of iron from its deposits. We aim to investigate the effect of V on hepcidin mRNA expression and its consequences on the hematological parameters in streptozotocin-induced diabetic Wistar rats. Control healthy rats, diabetic rats, and diabetic rats treated with 1 mgV/day were examined for five weeks. The mineral levels were measured in diet and serum samples. Hepcidin expression was quantified in liver samples. Inflammatory and hematological parameters were determined in serum or whole blood samples. The inflammatory status was higher in diabetic than in control rats, whereas the hematological parameters were lower in the diabetic rats than in the control rats. Hepcidin mRNA expression was significantly lower in the V-treated diabetic rats than in control and untreated diabetic rats. The inflammatory status remained at a similar level as the untreated diabetic group. However, the hematological profile improved after the V-treatment, reaching similar levels to those found in the control group. Serum iron level was higher in V-treated than in untreated diabetic rats. We conclude that V reduces gene expression of hepcidin in diabetic rats, improving the anemic state caused by diabetes.
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Affiliation(s)
- Cristina Sánchez-González
- Biomedical Research Centre (CIBM), Sport and Health Research Centre (IMUDs), Institute of Nutrition and Food Technology, Department of Physiology, University of Granada, E-18071 Granada, Spain; (L.R.-G.); (P.A.); (J.L.)
- Correspondence: ; Tel.: +34-958241000 (ext. 20320)
| | - Lorenzo Rivas-García
- Biomedical Research Centre (CIBM), Sport and Health Research Centre (IMUDs), Institute of Nutrition and Food Technology, Department of Physiology, University of Granada, E-18071 Granada, Spain; (L.R.-G.); (P.A.); (J.L.)
| | - Alba Rodríguez-Nogales
- CIBERehd, Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), Department of Pharmacology, CIBM, University of Granada, E-18071 Granada, Spain; (A.R.-N.); (F.A.); (J.G.)
| | - Francesca Algieri
- CIBERehd, Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), Department of Pharmacology, CIBM, University of Granada, E-18071 Granada, Spain; (A.R.-N.); (F.A.); (J.G.)
| | - Julio Gálvez
- CIBERehd, Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), Department of Pharmacology, CIBM, University of Granada, E-18071 Granada, Spain; (A.R.-N.); (F.A.); (J.G.)
| | - Pilar Aranda
- Biomedical Research Centre (CIBM), Sport and Health Research Centre (IMUDs), Institute of Nutrition and Food Technology, Department of Physiology, University of Granada, E-18071 Granada, Spain; (L.R.-G.); (P.A.); (J.L.)
| | - María Montes-Bayón
- Department of Physical and Analytical Chemistry, Faculty of Chemistry, University of Oviedo, 33007 Oviedo, Spain;
| | - Juan Llopis
- Biomedical Research Centre (CIBM), Sport and Health Research Centre (IMUDs), Institute of Nutrition and Food Technology, Department of Physiology, University of Granada, E-18071 Granada, Spain; (L.R.-G.); (P.A.); (J.L.)
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Peña-Montes DJ, Huerta-Cervantes M, Ríos-Silva M, Trujillo X, Cortés-Rojo C, Huerta M, Saavedra-Molina A. Effects of dietary iron restriction on kidney mitochondria function and oxidative stress in streptozotocin-diabetic rats. Mitochondrion 2020; 54:41-48. [DOI: 10.1016/j.mito.2020.07.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 06/10/2020] [Accepted: 07/08/2020] [Indexed: 12/22/2022]
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Sousa L, Oliveira MM, Pessôa MTC, Barbosa LA. Iron overload: Effects on cellular biochemistry. Clin Chim Acta 2019; 504:180-189. [PMID: 31790701 DOI: 10.1016/j.cca.2019.11.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 11/19/2019] [Accepted: 11/20/2019] [Indexed: 02/07/2023]
Abstract
Iron is an essential element for human life. However, it is a pro-oxidant agent capable of reacting with hydrogen peroxide. An iron overload can cause cellular changes, such as damage to the plasma membrane leading to cell death. Effects of iron overload in cellular biochemical processes include modulating membrane enzymes, such as the Na, K-ATPase, impairing the ionic transport and inducing irreversible damage to cellular homeostasis. To avoid such damage, cells have an antioxidant system that acts in an integrated manner to prevent oxidative stress. In addition, the cells contain proteins responsible for iron transport and storage, preventing its reaction with other substances during absorption. Moreover, iron is associated with cellular events coordinated by iron-responsive proteins (IRPs) that regulate several cellular functions, including a process of cell death called ferroptosis. This review will address the biochemical aspects of iron overload at the cellular level and its effects on important cellular structures.
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Affiliation(s)
- Leilismara Sousa
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindu, Divinópolis, MG, Brazil
| | - Marina M Oliveira
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindu, Divinópolis, MG, Brazil
| | - Marco Túlio C Pessôa
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindu, Divinópolis, MG, Brazil
| | - Leandro A Barbosa
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindu, Divinópolis, MG, Brazil.
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Ferraro B, Donniacuo M, Sodano L, Ferraraccio F, Maisto R, Gulotta E, Pieretti G, D'Amico M, Trotta MC, Rinaldi B. Addition of the Aldose Reductase Inhibitor Benzofuroxane Derivative BF-5m to Prolonged and Moderate Exercise Training Enhanced Protection of the Rat Heart From Type-1 Diabetes. Front Pharmacol 2019; 10:392. [PMID: 31040781 PMCID: PMC6476970 DOI: 10.3389/fphar.2019.00392] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 03/29/2019] [Indexed: 11/30/2022] Open
Abstract
Moderate exercise training may not be sufficient to exert beneficial effects on the cardiovascular system because of the long-term multifactorial etiology of diabetic complications. The addition of a proper pharmacological tool to the physical exercise should improve the outcomes of the diabetic damage. Here it is shown that 8 weeks exercise training of type 1 diabetic Sprague-Dawley (SD) rats resulted in a significantly increased heart rate, a 14% increase in the left ventricular ejection fraction (LVEF) increased plasma insulin levels and a 13% decrease in plasma glucose with respect to sedentary animals. The training also resulted in a 22% reduction in cardiac QT interval from a diabetic sedentary value of 185 ± 19 ms. Treatment of trained rats with the new antioxidant and NO-releasing aldose reductase 2 inhibitor 5(6)-(benzo[d]thiazol-2-ylmethoxy) benzofuroxane BF-5m, 20 mg/kg/day, added a further and significant (P < 0.01 vs. sedentary) increase of the LVEF up to 38% at 8 week time point. The long QT interval recorded in trained rats was reduced to further 12% by addition to the training of pharmacological treatment with 20 mg/kg/day BF-5m. At this time, the association of the two treatments improved the expression into the cardiac tissue of sarcoplasmic reticulum Ca2+ ATPase 2 (SERCA2) and manganese superoxide dismutase (MnSOD), and reduced the fibrosis.
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Affiliation(s)
- Bartolo Ferraro
- Institute for Cardiovascular Prevention (IPEK), Ludwig Maximilian University of Munich, Munich, Germany.,DZHK, Partner Site Munich Heart Alliance, Munich, Germany
| | - Maria Donniacuo
- Department of Experimental Medicine, Pharmacology Division, University of Campania "L. Vanvitelli", Naples, Italy
| | - Loredana Sodano
- Department of Experimental Medicine, Pharmacology Division, University of Campania "L. Vanvitelli", Naples, Italy
| | - Franca Ferraraccio
- Department of Clinical, Public and Preventive Medicine, University of Campania "L. Vanvitelli", Naples, Italy
| | - Rosa Maisto
- Department of Experimental Medicine, Pharmacology Division, University of Campania "L. Vanvitelli", Naples, Italy
| | - Eliana Gulotta
- Department of Surgical, Oncological and Stomatological Disciplines, University of Palermo, Palermo, Italy
| | - Gorizio Pieretti
- Multidisciplinary Department of Surgical and Dental Specialities, University of Campania "L. Vanvitelli", Naples, Italy
| | - Michele D'Amico
- Department of Experimental Medicine, Pharmacology Division, University of Campania "L. Vanvitelli", Naples, Italy
| | - Maria Consiglia Trotta
- Department of Experimental Medicine, Pharmacology Division, University of Campania "L. Vanvitelli", Naples, Italy
| | - Barbara Rinaldi
- Department of Experimental Medicine, Pharmacology Division, University of Campania "L. Vanvitelli", Naples, Italy
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Smith CP, Lee WK, Haley M, Poulsen SB, Thévenod F, Fenton RA. Proximal tubule transferrin uptake is modulated by cellular iron and mediated by apical membrane megalin-cubilin complex and transferrin receptor 1. J Biol Chem 2019; 294:7025-7036. [PMID: 30833328 PMCID: PMC6497946 DOI: 10.1074/jbc.ra118.006390] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 02/27/2019] [Indexed: 01/12/2023] Open
Abstract
Receptor-mediated endocytosis is responsible for reabsorption of transferrin (Tf) in renal proximal tubules (PTs). Although the role of the megalin-cubilin receptor complex (MCRC) in this process is unequivocal, modalities independent of this complex are evident but as yet undefined. Here, using immunostaining and Tf-flux assays, FACS analysis, and fluorescence imaging, we report localization of Tf receptor 1 (TfR1), the cognate Tf receptor mediating cellular holo-Tf (hTf) acquisition, to the apical brush border of the PT, with expression gradually declining along the PT in mouse and rat kidneys. In functional studies, hTf uptake across the apical membrane of cultured PT epithelial cell (PTEC) monolayers increased in response to decreased cellular iron after desferrioxamine (DFO) treatment. We also found that apical hTf uptake under basal conditions is receptor-associated protein (RAP)-sensitive and therefore mediated by the MCRC but becomes RAP-insensitive under DFO treatment, with concomitantly decreased megalin and cubilin expression levels and increased TfR1 expression. Thus, as well as the MCRC, TfR1 mediates hTf uptake across the PT apical brush border, but in conditions of decreased cellular iron, hTf uptake is predominated by augmented apical TfR1. In conclusion, both the MCRC and TfR1 mediate hTf uptake across apical brush border membranes of PTECs and reciprocally respond to decreased cellular iron. Our findings have implications for renal health, whole-body iron homeostasis, and pathologies arising from disrupted iron balance.
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Affiliation(s)
- Craig P Smith
- From the School of Medical Sciences, The University of Manchester, Manchester M13 9PT, United Kingdom,
| | - Wing-Kee Lee
- Physiology, Pathophysiology and Toxicology, University of Witten/Herdecke, D-58453 Witten, Germany, and
| | - Matthew Haley
- From the School of Medical Sciences, The University of Manchester, Manchester M13 9PT, United Kingdom
| | - Søren B Poulsen
- Department of Biomedicine, Aarhus University, Aarhus, 8000 Denmark
| | - Frank Thévenod
- Physiology, Pathophysiology and Toxicology, University of Witten/Herdecke, D-58453 Witten, Germany, and
| | - Robert A Fenton
- Department of Biomedicine, Aarhus University, Aarhus, 8000 Denmark
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11
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Chaudhary K, Promsote W, Ananth S, Veeranan-Karmegam R, Tawfik A, Arjunan P, Martin P, Smith SB, Thangaraju M, Kisselev O, Ganapathy V, Gnana-Prakasam JP. Iron Overload Accelerates the Progression of Diabetic Retinopathy in Association with Increased Retinal Renin Expression. Sci Rep 2018; 8:3025. [PMID: 29445185 PMCID: PMC5813018 DOI: 10.1038/s41598-018-21276-2] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 01/31/2018] [Indexed: 12/31/2022] Open
Abstract
Diabetic retinopathy (DR) is a leading cause of blindness among working-age adults. Increased iron accumulation is associated with several degenerative diseases. However, there are no reports on the status of retinal iron or its implications in the pathogenesis of DR. In the present study, we found that retinas of type-1 and type-2 mouse models of diabetes have increased iron accumulation compared to non-diabetic retinas. We found similar iron accumulation in postmortem retinal samples from human diabetic patients. Further, we induced diabetes in HFE knockout (KO) mice model of genetic iron overload to understand the role of iron in the pathogenesis of DR. We found increased neuronal cell death, vascular alterations and loss of retinal barrier integrity in diabetic HFE KO mice compared to diabetic wildtype mice. Diabetic HFE KO mouse retinas also exhibited increased expression of inflammation and oxidative stress markers. Severity in the pathogenesis of DR in HFE KO mice was accompanied by increase in retinal renin expression mediated by G-protein-coupled succinate receptor GPR91. In light of previous reports implicating retinal renin-angiotensin system in DR pathogenesis, our results reveal a novel relationship between diabetes, iron and renin-angiotensin system, thereby unraveling new therapeutic targets for the treatment of DR.
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Affiliation(s)
- Kapil Chaudhary
- Department of Medicine, Washington University, St. Louis, Missouri, USA
| | | | - Sudha Ananth
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Rajalakshmi Veeranan-Karmegam
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Amany Tawfik
- Dental College of Georgia, Augusta University, Augusta, Georgia, USA
| | | | - Pamela Martin
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Sylvia B Smith
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Muthusamy Thangaraju
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Oleg Kisselev
- Department of Ophthalmology and Department of Biochemistry & Molecular Biology, Saint Louis University, St. Louis, Missouri, USA
| | - Vadivel Ganapathy
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, Texas, USA
| | - Jaya P Gnana-Prakasam
- Department of Ophthalmology and Department of Biochemistry & Molecular Biology, Saint Louis University, St. Louis, Missouri, USA.
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12
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Wong WP, Wallia A, Edwards JR, El Muayed M. Comment on Menke et al. Metals in Urine and Diabetes in U.S. Adults. Diabetes 2016;65:164-171. Diabetes 2016; 65:e31. [PMID: 27555580 PMCID: PMC5860187 DOI: 10.2337/db16-0555] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Winifred P Wong
- Division of Endocrinology, Metabolism, and Molecular Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Amisha Wallia
- Division of Endocrinology, Metabolism, and Molecular Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Joshua R Edwards
- Department of Pharmacology, Midwestern University, Downers Grove, IL
| | - Malek El Muayed
- Division of Endocrinology, Metabolism, and Molecular Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL
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13
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Ikeda Y, Ozono I, Tajima S, Imao M, Horinouchi Y, Izawa-Ishizawa Y, Kihira Y, Miyamoto L, Ishizawa K, Tsuchiya K, Tamaki T. Iron chelation by deferoxamine prevents renal interstitial fibrosis in mice with unilateral ureteral obstruction. PLoS One 2014; 9:e89355. [PMID: 24586712 PMCID: PMC3929716 DOI: 10.1371/journal.pone.0089355] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2013] [Accepted: 01/20/2014] [Indexed: 01/19/2023] Open
Abstract
Renal fibrosis plays an important role in the onset and progression of chronic kidney diseases (CKD). Although several mechanisms underlying renal fibrosis and candidate drugs for its treatment have been identified, the effect of iron chelator on renal fibrosis remains unclear. In the present study, we examined the effect of an iron chelator, deferoxamine (DFO), on renal fibrosis in mice with surgically induced unilateral ureter obstruction (UUO). Mice were divided into 4 groups: UUO with vehicle, UUO with DFO, sham with vehicle, and sham with DFO. One week after surgery, augmented renal tubulointerstitial fibrosis and the expression of collagen I, III, and IV increased in mice with UUO; these changes were suppressed by DFO treatment. Similarly, UUO-induced macrophage infiltration of renal interstitial tubules was reduced in UUO mice treated with DFO. UUO-induced expression of inflammatory cytokines and extracellular matrix proteins was abrogated by DFO treatment. DFO inhibited the activation of the transforming growth factor-β1 (TGF-β1)-Smad3 pathway in UUO mice. UUO-induced NADPH oxidase activity and p22phox expression were attenuated by DFO. In the kidneys of UUO mice, divalent metal transporter 1, ferroportin, and ferritin expression was higher and transferrin receptor expression was lower than in sham-operated mice. Increased renal iron content was observed in UUO mice, which was reduced by DFO treatment. These results suggest that iron reduction by DFO prevents renal tubulointerstitial fibrosis by regulating TGF-β-Smad signaling, oxidative stress, and inflammatory responses.
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Affiliation(s)
- Yasumasa Ikeda
- Department of Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
- * E-mail:
| | - Iori Ozono
- Department of Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
- Student Lab, The University of Tokushima Faculty of Medicine, Tokushima, Japan
| | - Soichiro Tajima
- Department of Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Mizuki Imao
- Department of Medical Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Yuya Horinouchi
- Department of Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Yuki Izawa-Ishizawa
- Department of Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Yoshitaka Kihira
- Department of Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Licht Miyamoto
- Department of Medical Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Keisuke Ishizawa
- Department of Medical Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Koichiro Tsuchiya
- Department of Medical Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Toshiaki Tamaki
- Department of Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
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14
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Changes in iron metabolism and oxidative status in STZ-induced diabetic rats treated with bis(maltolato) oxovanadium (IV) as an antidiabetic agent. ScientificWorldJournal 2014; 2014:706074. [PMID: 24511298 PMCID: PMC3913100 DOI: 10.1155/2014/706074] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2013] [Accepted: 10/08/2013] [Indexed: 01/24/2023] Open
Abstract
The role of vanadium as a micronutrient and hypoglycaemic agent has yet to be fully clarified. The present study was undertaken to investigate changes in the metabolism of iron and in antioxidant defences of diabetic STZ rats following treatment with vanadium. Four groups were examined: control; diabetic; diabetic treated with 1 mgV/day; and Diabetic treated with 3 mgV/day. The vanadium was supplied in drinking water as bis(maltolato) oxovanadium (IV) (BMOV). The experiment had a duration of five weeks. Iron was measured in food, faeces, urine, serum, muscle, kidney, liver, spleen, and femur. Superoxide dismutase, catalase, NAD(P)H: quinone-oxidoreductase-1 (NQO1) activity, and protein carbonyl group levels in the liver were determined. In the diabetic rats, higher levels of Fe absorbed, Fe content in kidney, muscle, and femur, and NQO1 activity were recorded, together with decreased catalase activity, in comparison with the control rats. In the rats treated with 3 mgV/day, there was a significant decrease in fasting glycaemia, Fe content in the liver, spleen, and heart, catalase activity, and levels of protein carbonyl groups in comparison with the diabetic group. In conclusion BMOV was a dose-dependent hypoglycaemic agent. Treatment with 3 mgV/day provoked increased Fe deposits in the tissues, which promoted a protein oxidative damage in the liver.
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15
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El-Gebali S, Bentz S, Hediger MA, Anderle P. Solute carriers (SLCs) in cancer. Mol Aspects Med 2013; 34:719-34. [PMID: 23506905 DOI: 10.1016/j.mam.2012.12.007] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Accepted: 12/13/2012] [Indexed: 12/26/2022]
Abstract
During tumor progression cells acquire an altered metabolism, either as a cause or as a consequence of an increased need of energy and nutrients. All four major classes of macromolecules are affected: carbohydrates, proteins, lipids and nucleic acids. As a result of the changed needs, solute carriers (SLCs) which are the major transporters of these molecules are differently expressed. This renders them important targets in the treatment of cancer. Blocking or activating SLCs is one possible therapeutic strategy. For example, some SLCs are upregulated in tumor cells due to the increased demand for energy and nutritional needs. Thus, blocking them and turning off the delivery of fuel or nutrients could be one way to interfere with tumor progression. Specific drug delivery to cancer cells via transporters is another approach. Some SLCs are also interesting as chemosensitizing targets because blocking or activating them may result in an altered response to chemotherapy. In this review we summarize the roles of SLCs in cancer therapy and specifically their potential as direct or indirect targets, as drug carriers or as chemosensitizing targets.
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Affiliation(s)
- Sara El-Gebali
- Institute of Biochemistry and Molecular Medicine, University of Bern, Bern, Switzerland
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16
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Verapamil reverses cardiac iron overload in streptozocin-induced diabetic rats. Naunyn Schmiedebergs Arch Pharmacol 2013; 386:645-50. [PMID: 23564042 DOI: 10.1007/s00210-013-0863-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Accepted: 03/22/2013] [Indexed: 12/14/2022]
Abstract
Accumulating evidence shows that iron overload is a new risk factor for diabetes mellitus. L-type Ca(2+) channel (LTCC) has been identified as an important mediator for ferrous iron uptake into cardiomyocytes. In this study, we aimed to examine the effects of verapamil, the LTCC blocker, on myocardial iron metabolism in diabetic rats. Diabetes was induced by intraperitoneal injection of streptozocin after intragastric administration of fat emulsion, and then treated by verapamil (5 mg · kg(-1) · day(-1)) for 1 week. The results showed that verapamil did not alter the blood glucose level of diabetic rats. However, elevated levels of superoxide dismutase, malonaldehyde, and serum ferritin in diabetic rats were decreased significantly by verapamil treatment. Moreover, serum, myocardial, and urine iron were elevated remarkably along with a decrease of hepatic iron in diabetic rats. After verapamil administration, serum and myocardial iron in diabetic rats were reduced significantly but urine and hepatic iron were increased. Furthermore, confocal microscopy demonstrated that intracellular-free iron concentration was elevated dramatically in cardiomyocytes of diabetic rats, which was markedly attenuated after verapamil treatment. In summary, our data demonstrated that verapamil prevented myocardial iron overload by inhibiting intracellular iron accumulation in diabetic cardiomyocytes.
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17
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Ikeda Y, Enomoto H, Tajima S, Izawa-Ishizawa Y, Kihira Y, Ishizawa K, Tomita S, Tsuchiya K, Tamaki T. Dietary iron restriction inhibits progression of diabetic nephropathy in db/db mice. Am J Physiol Renal Physiol 2013; 304:F1028-36. [DOI: 10.1152/ajprenal.00473.2012] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Excess iron causes oxidative stress through hydroxyl-radical production via Fenton/Haber-Weiss reactions. Recently, body iron reduction has been found to ameliorate diabetes. In the present study, we examined the protective effect of dietary iron restriction against diabetic nephropathy in the db/db mouse model of diabetic nephropathy using db/m mice as controls. The db/db mice were divided into two groups and fed a normal diet (ND) or a low-iron diet (LID). Increasing urinary albumin excretion was observed in the ND db/db mice, but this was suppressed in db/db mice with LID. Histologically, the db/db mice in the ND group had increased glomerular volume and mesangial area compared with the LID group. Augmented deposition of extracellular matrixes was decreased in db/db mice with LID. In terms of oxidative stress, increased superoxide production observed in the kidneys of the ND db/db mice was diminished in the LID group. NADPH oxidase activity and renal expression of NADPH oxidase components p22phox and NADPH oxidase 4 (NOX4) were augmented in the ND group, and this was abolished by LID. There were no differences in expression of renal iron importers, transferrin receptor, or divalent metal transporter-1 between db/m mice and db/db mice. The level of ferroportin, an iron exporter, increased in the kidneys of the db/db mice. Urinary iron excretion was significantly higher in ND db/db mice and was reduced in the LID group. These findings suggest that dietary iron restriction exerts a preventive effect on the progression of diabetic nephropathy partly due to the reduction of oxidative stress.
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Affiliation(s)
- Yasumasa Ikeda
- Department of Pharmacology, Institute of Health Biosciences, University of Tokushima Graduate School, Tokushima, Japan
| | - Hideaki Enomoto
- Department of Pharmacology, Institute of Health Biosciences, University of Tokushima Graduate School, Tokushima, Japan
- Student Laboratory, Faculty of Medicine, University of Tokushima, Tokushima, Japan
| | - Soichiro Tajima
- Department of Pharmacology, Institute of Health Biosciences, University of Tokushima Graduate School, Tokushima, Japan
| | - Yuki Izawa-Ishizawa
- Department of Pharmacology, Institute of Health Biosciences, University of Tokushima Graduate School, Tokushima, Japan
| | - Yoshitaka Kihira
- Department of Pharmacology, Institute of Health Biosciences, University of Tokushima Graduate School, Tokushima, Japan
| | - Keisuke Ishizawa
- Department of Medical Pharmacology, Institute of Health Biosciences, University of Tokushima Graduate School, Tokushima, Japan; and
| | - Shuhei Tomita
- Department of Pharmacology, Institute of Health Biosciences, University of Tokushima Graduate School, Tokushima, Japan
- Division of Molecular Pharmacology, Tottori University, Tottori, Japan
| | - Koichiro Tsuchiya
- Department of Medical Pharmacology, Institute of Health Biosciences, University of Tokushima Graduate School, Tokushima, Japan; and
| | - Toshiaki Tamaki
- Department of Pharmacology, Institute of Health Biosciences, University of Tokushima Graduate School, Tokushima, Japan
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18
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Silva M, de Brito Magalhães CL, de Paula Oliveira R, Silva ME, Pedrosa ML. Differential expression of iron metabolism proteins in diabetic and diabetic iron-supplemented rat liver. J Biochem Mol Toxicol 2011; 26:123-9. [PMID: 22170771 DOI: 10.1002/jbt.20418] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2011] [Revised: 09/26/2011] [Accepted: 10/17/2011] [Indexed: 12/28/2022]
Abstract
Diabetes mellitus is associated with altered iron homeostasis that can potentially effect reactive oxygen species generation and contribute to diabetes-related complications. We investigated, by quantitative polymerase chain reaction, whether the expression of liver hepcidin, ferritin, and TfR-1 is altered in diabetes. Rats in the control (C) group received a standard diet; control iron (CI) group received a standard diet supplemented with iron; diabetic (D) group received an injection of streptozotocin; and diabetic iron (DI) group received streptozotocin and the diet with iron. Animals of the D group showed higher levels of serum iron, increased concentration of carbonyl protein, and a decrease in antioxidant status. Group D rats showed increased hepatic expression of Trf-1 compared to the other groups. Iron supplementation reversed this increase. Hepcidin mRNA was 81% higher in DI than in C and CI rats. The results suggest that diabetes, with or without excess iron, can cause perturbations in iron status, hepcidin and Trf-1 expression.
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Affiliation(s)
- Maísa Silva
- Programa de Pós graduação em Ciências Biológicas, Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil.
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19
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Vinokur V, Leibowitz G, Grinberg L, Eliashar R, Berenshtein E, Chevion M. Diabetes and the heart: could the diabetic myocardium be protected by preconditioning? Redox Rep 2008; 12:246-56. [PMID: 17961296 DOI: 10.1179/135100007x239289] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Both type 1 and type 2 diabetes (insulin-dependent and non-insulin dependent diabetes, respectively) are associated with increased risk for microvascular and macrovascular complications including retinopathy, neuropathy, nephropathy and atherosclerosis. Type 2 diabetes markedly increases the risk for cardiovascular morbidity and mortality, which has major public health implications. In this review, molecular mechanisms pertaining to diabetes-induced heart pathology are addressed.
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Affiliation(s)
- Vladimir Vinokur
- Department of Cellular Biochemistry and Human Genetics, The Hebrew University of Jerusalem, Jerusalem, Israel
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20
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Ishizaka N, Matsuzaki G, Saito K, Furuta K, Mori I, Nagai R. Downregulation of klotho gene expression in streptozotocin-induced diabetic rats. Geriatr Gerontol Int 2007. [DOI: 10.1111/j.1447-0594.2007.00405.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Ishizaka N, Saito K, Furuta K, Matsuzaki G, Koike K, Noiri E, Nagai R. Angiotensin II-induced regulation of the expression and localization of iron metabolism-related genes in the rat kidney. Hypertens Res 2007; 30:195-202. [PMID: 17460390 DOI: 10.1291/hypres.30.195] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Due to recent discoveries of novel genes involved in iron metabolism, our understanding of the molecular mechanisms underlying iron metabolism has dramatically increased. We have previously shown that the administration of angiotensin II alters iron homeostasis in the rat kidney, which may in turn aggravate angiotensin II-induced renal damage. Here we have investigated the effect of angiotensin II administration on the localization and expression of transferrin receptor (TfR), divalent metal transporter 1 (DMT1), ferroportin 1 (FPN), and hepcidin mRNA in the rat kidney. Weak expression of TfR, DMT1, FPN, and hepcidin mRNA was observed in the kidneys of control rats. In contrast, after 7 days of angiotensin II infusion by osmotic minipump, the expression of these mRNAs was more widely distributed. Staining of serial sections revealed that some, but not all, of the renal tubular cells positive for these genes contained iron deposits in the kidney of angiotensin II-infused animals. Real-time polymerase chain reaction (PCR) showed that the mRNA expression of TfR, iron-responsive element-negative DMT1, FPN, and hepcidin mRNA increased ~1.9-fold, ~1.7-fold, ~2.3-fold, and ~4.7-fold, respectively, after angiotensin II infusion as compared with that of untreated controls, and that these increases could be suppressed by the concomitant administration of losartan. Our data demonstrate that these genes were unequivocally expressed in the kidney and could be regulated by angiotensin II infusion. The relative contribution, if any, of these genes to renal and/or whole-body iron homeostasis in various disorders in which the renin angiotensin system is activated should be investigated in future studies.
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Affiliation(s)
- Nobukazu Ishizaka
- Department of Cardiovascular Medicine, University of Tokyo Graduate School of Medicine, Japan.
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22
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Donnadieu-Claraz M, Bonnehorgne M, Dhieux B, Maubert C, Cheynet M, Paquet F, Gourmelon P. Chronic Exposure to Uranium Leads to Iron Accumulation in Rat Kidney Cells. Radiat Res 2007; 167:454-64. [PMID: 17388691 DOI: 10.1667/rr0545.1] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2006] [Accepted: 11/09/2006] [Indexed: 11/03/2022]
Abstract
After it is incorporated into the body, uranium accumulates in bone and kidney and is a nephrotoxin. Although acute or short-term uranium exposures are well documented, there is a lack of information about the effects of chronic exposure to low levels of uranium on both occupationally exposed people and the general public. The objective of this study was to identify the distribution and chemical form of uranium in kidneys of rats chronically exposed to uranium in drinking water (40 mg uranium liter(-1)). Rats were killed humanely 6, 9, 12 and 18 months after the beginning of exposure. Kidneys were dissected out and prepared for optical and electron microscope analysis and energy dispersive X-ray (XEDS) or electron energy loss spectrometry (EELS). Microscopic analysis showed that proximal tubule cells from contaminated rats had increased numbers of vesicles containing dense granular inclusions. These inclusions were composed of clusters of small granules and increased in number with the exposure duration. Using XEDS and EELS, these characteristic granules were identified as iron oxides. Uranium was found to be present as a trace element but was never associated with the iron granules. These results suggested that the mechanisms of iron homeostasis in kidney could be affected by chronic uranium exposure.
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Affiliation(s)
- Marie Donnadieu-Claraz
- Institut de Radioprotection et de Sûreté Nucléaire, DRPH/SRBE, Laboratoire de Radiotoxicologie Expérimentale, Pierrelatte, France.
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23
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Oksala NKJ, Lappalainen J, Laaksonen DE, Khanna S, Kaarniranta K, Sen CK, Atalay M. Alpha-lipoic Acid modulates heat shock factor-1 expression in streptozotocin-induced diabetic rat kidney. Antioxid Redox Signal 2007; 9:497-506. [PMID: 17280490 DOI: 10.1089/ars.2006.1450] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Increased oxidative stress and impaired heat shock protein (HSP) synthesis may contribute to diabetic nephropathy. The question of whether 8-week thiol antioxidant alpha-lipoic acid (LA) supplementation modulates HSP response and oxidative stress was studied in the kidney of streptozotocin-induced diabetic (SID) and nondiabetic rats. SID caused a histological mesangial expansion, tubular dilatation, and increased levels of transforming growth factor-beta (TGF-beta), a mediator of glomerulosclerosis. SID increased 4-hydroxynonenal (4-HNE) protein adduct formation, a marker of lipid peroxidation, and heme oxygenase-1 (HO-1), also a marker of oxidative stress. Moreover, SID increased the DNA-binding activity of heat shock factor-1 (HSF-1) and expression of heat shock protein 60 (HSP60). In contrast, LA supplementation partially reversed histological findings of glomerulosclerosis and decreased TGF-beta. LA also increased HSF-1 and decreased HO-1 protein expression, without affecting 4-HNE protein adduct levels. At the mRNA level, LA increased expression of HSF-1, HSP90, and glucose-regulated protein (GRP75) in both control and diabetic animals and HSP72 in SID rats. However, LA supplementation did not affect these HSPs at the protein level. These findings suggest that in addition to its antiglomerulosclerotic effects, LA can induce cytoprotective response in SID.
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Affiliation(s)
- Niku K J Oksala
- Institute of Biomedicine, Physiology, University of Kuopio, Kuopio, Finland
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