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Association between hepcidin and type 2 diabetes markers in indigenous Argentinean children living at high altitude. Clin Chim Acta 2022; 537:194-198. [DOI: 10.1016/j.cca.2022.08.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Revised: 08/19/2022] [Accepted: 08/22/2022] [Indexed: 01/08/2023]
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2
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Gonçalves MG, Medeiros MA, de Lemos LIC, de Fátima Campos Pedrosa L, de Andrade Santos PP, Abreu BJ, Lima JPMS. Effects of Creatine Supplementation on Histopathological and Biochemical Parameters in the Kidney and Pancreas of Streptozotocin-Induced Diabetic Rats. Nutrients 2022; 14:nu14030431. [PMID: 35276790 PMCID: PMC8840440 DOI: 10.3390/nu14030431] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 12/29/2021] [Accepted: 12/29/2021] [Indexed: 12/15/2022] Open
Abstract
Diabetes mellitus (DM) is a worldwide health concern, and projections state that cases will reach 578 million by 2030. Adjuvant therapies that can help the standard treatment and mitigate DM effects are necessary, especially those using nutritional supplements to improve glycemic control. Previous studies suggest creatine supplementation as a possible adjuvant therapy for DM, but they lack the evaluation of potential morphological parameters alterations and tissue injury caused by this compound. The present study aimed to elucidate clinical, histomorphometric, and histopathological consequences and the cellular oxidative alterations of creatine supplementation in streptozotocin (STZ)-induced type 1 DM rats. We could estimate whether the findings are due to DM or the supplementation from a factorial experimental design. Although creatine supplementation attenuated some biochemical parameters, the morphological analyses of pancreatic and renal tissues made clear that the supplementation did not improve the STZ-induced DM1 injuries. Moreover, creatine-supplemented non-diabetic animals were diagnosed with pancreatitis and showed renal tubular necrosis. Therefore, even in the absence of clinical symptoms and unaltered biochemical parameters, creatine supplementation as adjuvant therapy for DM should be carefully evaluated.
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Affiliation(s)
- Meline Gomes Gonçalves
- Biochemistry and Molecular Biology Graduate Program, Biosciences Center, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil;
| | - Matheus Anselmo Medeiros
- Bioinformatics Graduate Program, Digital Metropolis Institute, Federal University of Rio Grande do Norte, Natal 59078-400, RN, Brazil;
| | | | - Lucia de Fátima Campos Pedrosa
- Graduate Program in Nutrition, Federal University of Rio Grande do Norte, Natal 59.078-970, RN, Brazil; (L.I.C.d.L.); (L.d.F.C.P.)
| | - Pedro Paulo de Andrade Santos
- Structural and Functional Biology Graduate Program, Biosciences Center, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil;
- Biosciences Center, Morphology Department, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil;
| | - Bento João Abreu
- Biosciences Center, Morphology Department, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil;
| | - João Paulo Matos Santos Lima
- Biochemistry and Molecular Biology Graduate Program, Biosciences Center, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil;
- Bioinformatics Graduate Program, Digital Metropolis Institute, Federal University of Rio Grande do Norte, Natal 59078-400, RN, Brazil;
- Correspondence:
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3
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Faradina A, Tseng SH, Tung TH, Huang SY, Lee YC, Skalny AV, Tinkov AA, Chen SH, Chuang YK, Chang JS. High-dose ferric citrate supplementation attenuates omega-3 polyunsaturated fatty acid biosynthesis via downregulating delta 5 and 6 desaturases in rats with high-fat diet-induced obesity. Food Funct 2021; 12:11819-11828. [PMID: 34787162 DOI: 10.1039/d1fo02680a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Obesity is associated with an increased risk of an iron deficiency; however, a synergistic relationship between iron and lipid homeostasis was also observed. The aim of this study was to investigate the effects of pharmacological doses of iron supplementation on omega 3 (n-3) and omega 6 (n-6) polyunsaturated fatty acids (PUFAs). Sprague-Dawley (SD) rats were fed a normal diet or a 50% high-fat diet (HFD) without or with pharmacological doses of ferric citrate (0.25, 1, or 2 g ferric iron per kg diet) for 12 weeks, and erythrocyte profiles of n-3 and n-6 PUFAs were quantitated. Ferric citrate supplementation showed dose-related effects on liver inflammation, liver iron accumulation, and increasing circulating levels of iron, erythrocyte degradation biomarkers LVV-hemorphin-7, malondialdehyde (MDA), and insulin. Obese rats supplemented with 2 g ferric iron per kg diet also had decreased levels of eicosapentaenoic acid (EPA), docosapentaenoic acid (DPA), and total n-3 PUFAs compared to rats fed a normal diet or HFD alone. A western blotting analysis revealed that iron-mediated downregulation of n-3 PUFA-converting enzymes (Δ5 and Δ6 desaturases) only occurred at high dosages (≥1 g ferric iron per kg diet). A Spearman correlation analysis showed that total liver iron and serum LVV-hemorphin-7 and MDA were negatively correlated with n-3 PUFAs and their converting enzymes (Δ5 and Δ6 desaturases) (all p < 0.05). In conclusion, obese rats that received high-dose ferric citrate supplementation (>1 g of ferric iron per kg diet) exhibited decreased n-3 PUFA levels via downregulation of expressions of Δ5 and Δ6 desaturase enzymes.
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Affiliation(s)
- Amelia Faradina
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei, Taiwan.
| | - Sung-Hui Tseng
- Department of Physical Medicine and Rehabilitation, Taipei Medical University Hospital, Taipei, Taiwan.,Department of Physical Medicine and Rehabilitation, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Te-Hsuan Tung
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei, Taiwan.
| | - Shih-Yi Huang
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei, Taiwan. .,Graduate Institute of Metabolism and Obesity Sciences, College of Nutrition, Taipei Medical University, Taipei, Taiwan.,Center for Reproductive Medicine & Sciences, Taipei Medical University Hospital, Taipei, Taiwan
| | - Yu-Chieh Lee
- Department of Obstetrics and Gynecology, Taipei Medical University Hospital, Taipei, Taiwan
| | - Anatoly V Skalny
- Laboratory of Molecular Dietology, IM Sechenov First Moscow State Medical University (Sechenov University), 119146, Moscow, Russia
| | - Alexey A Tinkov
- Laboratory of Molecular Dietology, IM Sechenov First Moscow State Medical University (Sechenov University), 119146, Moscow, Russia.,Institute of Cellular and Intracellular Symbiosis, Russian Academy of Sciences, 460000, Orenburg, Russia
| | - Seu-Hwa Chen
- Department of Anatomy and Cell Biology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yung-Kun Chuang
- Master Program in Food Safety, College of Nutrition, Taipei Medical University, Taipei, Taiwan
| | - Jung-Su Chang
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei, Taiwan. .,Graduate Institute of Metabolism and Obesity Sciences, College of Nutrition, Taipei Medical University, Taipei, Taiwan.,Nutrition Research Center, Taipei Medical University Hospital, Taipei, Taiwan.,Chinese Taipei Society for the Study of Obesity, CTSSO, Taipei, Taiwan
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4
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Kurniawan AL, Lee YC, Shih CK, Hsieh RH, Chen SH, Chang JS. Alteration in iron efflux affects male sex hormone testosterone biosynthesis in a diet-induced obese rat model. Food Funct 2020; 10:4113-4123. [PMID: 31233037 DOI: 10.1039/c8fo01870g] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This study was motivated by clinical observations that dysmetabolic iron overload syndrome (DIOS) and an androgen deficiency are common features observed in obese adult men; however, the molecular mechanism underlying the effects of DIOS on androgen deficiency remains to be elucidated. We established a DIOS animal model by feeding Sprague-Dawley rats an iron/fat-enriched diet (50% fat plus 0.25, 1, or 2 g ferric iron per kg diet) for 12 weeks to induce iron dysfunction (indicated by decreased tissue iron efflux) in obese rats. Obese rats fed an iron/fat-enriched diet showed decreased levels of testicular total Testosterone (T) and iron exporter ferroportin but increased levels of testicular iron and hepcidin, and these effects were more evident with a >1 g ferric iron per kg diet. A western blot analysis showed that an iron/fat-enriched diet triggered testicular endoplasmic reticular (ER) stress but decreased mitochondrion biogenesis proteins (PGC1α and TFAM) and T-converting proteins (StAR, CYP11A, and 17β-HSD). TUNEL staining showed that >1 g ferric iron induced apoptosis mainly in germ cells and Leydig's cells. Uncontrolled testicular iron efflux may cause mitochondrial-ER dysfunction and affect T biosynthesis. Future study targeting the testicular hepcidin-ferroportin axis may offer a therapeutic tool to alleviate testicular iron retention and mitochondrial-ER stress in Leydig's cells.
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Affiliation(s)
- Adi Lukas Kurniawan
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei, Taiwan.
| | - Yu-Chieh Lee
- Department of Obstetrics and Gynecology, Taipei Medical University Hospital, Taipei, Taiwan
| | - Chun-Kuang Shih
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei, Taiwan. and School of Food Safety, College of Nutrition, Taipei Medical University, Taipei, Taiwan
| | - Rong-Hong Hsieh
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei, Taiwan.
| | - Seu-Hwa Chen
- Department of Anatomy and Cell Biology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Jung-Su Chang
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei, Taiwan. and Graduate Institute of Metabolism and Obesity Sciences, College of Nutrition, Taipei Medical University, Taipei, Taiwan and Nutrition Research Center, Taipei Medical University Hospital, Taipei, Taiwan and Chinese Taipei Society for the Study of Obesity, CTSSO, Taipei, Taiwan
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5
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Shu T, Lv Z, Xie Y, Tang J, Mao X. Hepcidin as a key iron regulator mediates glucotoxicity-induced pancreatic β-cell dysfunction. Endocr Connect 2019; 8:150-161. [PMID: 30776286 PMCID: PMC6391907 DOI: 10.1530/ec-18-0516] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Accepted: 01/21/2019] [Indexed: 02/06/2023]
Abstract
It has been well established that glucotoxicity induces pancreatic β-cells dysfunction; however, the precise mechanism remains unclear. Our previous studies demonstrated that high glucose concentrations are associated with decreased hepcidin expression, which inhibits insulin synthesis. In this study, we focused on the role of low hepcidin level-induced increased iron deposition in β-cells and the relationship between abnormal iron metabolism and β-cell dysfunction. Decreased hepcidin expression increased iron absorption by upregulating transferrin receptor 1 (TfR1) and divalent metal transporter 1 (DMT1) expression, resulting in iron accumulation within cells. Prussia blue stain and calcein-AM assays revealed greater iron accumulation in the cytoplasm of pancreatic tissue isolated from db/db mice, cultured islets and Min6 cells in response to high glucose stimulation. Increased cytosolic iron deposition was associated with greater Fe2+ influx into the mitochondria, which depolarized the mitochondria membrane potential, inhibited ATP synthesis, generated excessive ROS and induced oxidative stress. The toxic effect of excessive iron on mitochondrial function eventually resulted in impaired insulin secretion. The restricted iron content in db/db mice via reduced iron intake or accelerated iron clearance improved blood glucose levels with decreased fasting blood glucose (FBG), fasting blood insulin (FIns), HbA1c level, as well as improved intraperitoneal glucose tolerance test (IPGTT) results. Thus, our study may reveal the mechanism involved in the role of hepcidin in the glucotoxcity impaired pancreatic β cell function pathway.
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Affiliation(s)
- Tingting Shu
- Department of Central Laboratory, Jiangsu Province Official Hospital, Nanjing, Jiangsu, China
| | - Zhigang Lv
- Department of Central Laboratory, Jiangsu Province Official Hospital, Nanjing, Jiangsu, China
| | - Yuchun Xie
- Department of Central Laboratory, Jiangsu Province Official Hospital, Nanjing, Jiangsu, China
| | - Junming Tang
- Department of Clinical Laboratory, Yixing People Hospital, Affiliated Jiangsu University, Yixing, Wuxi, Jiangsu, China
| | - Xuhua Mao
- Department of Clinical Laboratory, Yixing People Hospital, Affiliated Jiangsu University, Yixing, Wuxi, Jiangsu, China
- Correspondence should be addressed to X Mao:
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6
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Effect of Endoplasmic Reticular Stress on Free Hemoglobin Metabolism and Liver Injury. Int J Mol Sci 2018; 19:ijms19071977. [PMID: 29986432 PMCID: PMC6073154 DOI: 10.3390/ijms19071977] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 06/11/2018] [Accepted: 06/29/2018] [Indexed: 02/06/2023] Open
Abstract
Elevated soluble (s) CD163 and free hemoglobin (Hb) levels predict fatty liver progression; however, the molecular mechanisms underlying Hb metabolism and liver injury remain undefined. We investigated the effects of endoplasmic reticular (ER) stress on red blood cell (RBC) rheology and free Hb recycling pathways. ER stress was induced in Sprague-Dawley rats by an intraperitoneal injection of tunicamycin (TM) (50, 100, and 200 μg/100 g body weight (BW)) or an intravenous injection of Hb (5 mg/100 g BW). A TM injection increased sCD163 levels, attenuated free Hb uptake, and maintained RBC aggregability. An Hb injection increased serum LVV-hemorphin-7 and total bilirubin levels, but this effect was suppressed by TM. A Western blot analysis showed that ER stress suppressed Hb degradation in the liver through downregulation of globin degradation proteins cathepsin D and glyoxalase-1, as well as heme degradation protein heme oxyganase-1 and keap-1 expression. An ER stress activator also increased the translocation of nuclear factor (NF)-κB (p65) and nuclear factor-erythroid 2-related factor 2 (Nrf2) to nuclei. In conclusion, ER stress triggers ineffective Hb metabolism via altering globin and heme iron degradation pathways. Inability to recycle and metabolize free Hb may underlie the association between iron dysfunction and liver injury.
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Zacharski LR, Shamayeva G, Chow BK. Iron reduction response and demographic differences between diabetics and non-diabetics with cardiovascular disease entered into a controlled clinical trial. Metallomics 2018; 10:264-277. [DOI: 10.1039/c7mt00282c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Filings of elemental iron separated magnetically from a homogenate of breakfast cereal implicated in the risk of cardiovascular disease and diabetes.
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Affiliation(s)
- Leo R. Zacharski
- Veterans Affairs New England Health Care System
- Research Service (151)
- VA Medical Center
- White River Jct
- USA
| | - Galina Shamayeva
- Veterans Affairs Cooperative Studies Program Coordinating Center
- Veterans Affairs Palo Alto Health Care System
- Palo Alto
- USA
| | - Bruce K. Chow
- Veterans Affairs Cooperative Studies Program Coordinating Center
- Veterans Affairs Palo Alto Health Care System
- Palo Alto
- USA
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8
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Chang TY, Liu KL, Chang CS, Su CT, Chen SH, Lee YC, Chang JS. Ferric Citrate Supplementation Reduces Red-Blood-Cell Aggregation and Improves CD163+ Macrophage-Mediated Hemoglobin Metabolism in a Rat Model of High-Fat-Diet-Induced Obesity. Mol Nutr Food Res 2017; 62. [PMID: 29064631 DOI: 10.1002/mnfr.201700442] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 10/09/2017] [Indexed: 12/13/2022]
Abstract
SCOPE In adults, >90% of the daily iron requirement is derived from macrophage-mediated heme iron, recycling from senescent red blood cells (RBCs) or free hemoglobin (Hb). Currently, the effects of pharmacological doses of iron supplementation on RBCs and heme iron recycling in obesity are unclear. METHODS AND RESULTS Sprague Dawley rats are fed a standard diet or a 50% high-fat diet (HFD) with (0.25, 1, and 2 g of ferric iron per kg diet) or without ferric citrate supplementation for 12 weeks. Ferric iron increases hepatic iron accumulation in macrophages and hepatocyte-like cells. Compared with rats that received the standard diet, HFD-fed rats exhibit higher RBC aggregation and serum-free Hb levels but lower LVV-hemorphin-7 levels. These effects are reversed by ferric citrate supplementation. Immunofluorescent staining reveals that ferric iron increases the expression of hepatic CD163+ macrophages and heme oxygenase (HO)-1. A further analysis reveals the dose-related effects of ferric iron on hepatic globin degradation proteins (cathepsin D and glyoxalase 1), cytochrome p450 reductase expression, and HO-1 enzyme activity. CONCLUSIONS Ferric citrate supplementation reduces RBC aggregation and improves CD163+ macrophage-mediated Hb metabolism in HFD-induced obese rats. These findings suggest that ferric citrate may be explored as an alternative treatment method for RBC dysfunction.
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Affiliation(s)
- Ting-Yun Chang
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei, Taiwan
| | - Kai-Li Liu
- Department of Nutrition, Chung Shan Medical University, Taichung, Taiwan.,Department of Dietitian, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - Cheng Sheng Chang
- Department of Family Medicine, Taipei Medical University Hospital, Taipei, Taiwan
| | - Chien-Tien Su
- Department of Family Medicine, Taipei Medical University Hospital, Taipei, Taiwan.,School of Public Health, College of Public Health, Taipei Medical University, Taipei, Taiwan
| | - Seu-Hwa Chen
- Department of Anatomy and Cell Biology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yu-Chieh Lee
- Department of Obstetrics and Gynecology, Taipei Medical University Hospital, Taipei, Taiwan
| | - Jung-Su Chang
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei, Taiwan.,Nutrition Research Center, Taipei Medical University Hospital, Taipei, Taiwan.,Graduate Institute of Metabolism and Obesity Sciences, College of Nutrition, Taipei Medical University, Taipei, Taiwan
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9
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Mao X, Chen H, Tang J, Wang L, Shu T. Hepcidin links gluco-toxicity to pancreatic beta cell dysfunction by inhibiting Pdx-1 expression. Endocr Connect 2017; 6:121-128. [PMID: 28179377 PMCID: PMC5424768 DOI: 10.1530/ec-16-0115] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 02/08/2017] [Indexed: 12/16/2022]
Abstract
OBJECTIVE Gluco-toxicity is a term used to convey the detrimental effect of hyperglycemia on β-cell function through impaired insulin synthesis. Although it is known that the expression and activity of several key insulin transcription regulators is inhibited, other molecular mechanisms that mediate gluco-toxicity are poorly defined. Our objective was to explore the role of hepcidin in β-cell gluco-toxicity. DESIGN We first confirmed that high glucose levels inhibited hepcidin expression in the mouse insulinoma cell line, MIN6. The downregulation of hepcidin decreased Pdx-1 expression, which reduced insulin synthesis. METHODS MIN6 cells were exposed to high glucose concentrations (33.3 mmol/L). Glucose-stimulated insulin secretion (GSIS) and serum hepcidin levels were measured by ELISA. The mRNA levels of insulin1, insulin2, Pdx-1 and hepcidin were measured by real-time polymerase chain reaction. Western blot analysis was used to detect the changes in PDX-1 expression. Transient overexpression with hepcidin was used to reverse the downregulation of Pdx-1 and insulin synthesis induced by gluco-toxicity. RESULTS Exposure of MIN6 cells to high glucose significantly decreased GSIS and inhibited insulin synthesis as well as Pdx-1 transcriptional activity and expression at both the mRNA and protein levels. High glucose also decreased hepcidin expression and secretion. Hepcidin overexpression in MIN6 cells partially reversed the gluco-toxicity-induced downregulation of Pdx-1 and insulin expression and improved GSIS. The restoration of insulin synthesis by transfection of a hepcidin overexpression plasmid confirmed the role of hepcidin in mediating the gluco-toxic inhibition of insulin synthesis. CONCLUSIONS Our observations suggest that hepcidin is associated with gluco-toxicity-reduced pancreatic β-cell insulin synthesis in type 2 diabetes by inhibiting Pdx-1 expression.
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Affiliation(s)
- Xuhua Mao
- Department of Clinical LaboratoryYixing People's Hospital, Yixing, Wuxi, Jiangsu, China
| | - Hucheng Chen
- Department of Nuclear MedicineNanjing Hospital Affiliated to Nanjing Medical University, Nanjing, Jiangsu, China
| | - Junmin Tang
- Department of Clinical LaboratoryYixing People's Hospital, Yixing, Wuxi, Jiangsu, China
| | - Liangliang Wang
- Department of NeurologyYixing People's Hospital Affiliated to Jiangsu University, Yixing, Wuxi, Jiangsu, China
| | - Tingting Shu
- Department of Central LaboratoryJiangsu Province Official Hospital, Nanjing, Jiangsu, China
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Chao KC, Chen SH, Chang CC, Lee YC, Wang CM, Chang JS. Effects of ferric citrate supplementation on advanced glycation end products in a rat model of streptozotocin/nicotinamide-induced diabetes. Mol Nutr Food Res 2017; 61. [PMID: 27862990 DOI: 10.1002/mnfr.201600753] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Revised: 10/20/2016] [Accepted: 11/03/2016] [Indexed: 12/30/2022]
Abstract
SCOPE Diabetes is associated with the increased risks of anemia and activation of advanced glycation end products (AGEs) and the receptor for AGEs (RAGE). However, the effects of pharmacological doses of iron supplementation on AGE metabolism are less clear. The aim was to investigate the effect of ferric citrate supplementation on AGE metabolism. METHODS AND RESULTS Diabetes was induced in overnight starved rats by intraperitoneal injections of 40 mg/kg streptozotocin and 120 mg/kg nicotinamide. Diabetic rats were fed a standard diet or pharmacological doses of ferric citrate (0.5, 1, 2, and 3 g of ferric iron/kg diet) for 10 weeks. Ferric citrate supplementation showed a dose-related effect on the hepatic steatosis score, malondialdehyde, cathepsin D, and glyoxalase I. A Western blot analysis revealed that >1 g of ferric iron suppressed hepatic AGE receptor 1 and high-mobility group-box 1 expressions but increased heme oxygenase-1 and RAGE expressions. Further analysis showed that high doses of ferric iron triggered sterol regulatory element-binding protein 1c, p38-mitogen-activated protein kinase, and nuclear factor-κB protein expressions. CONCLUSION Overall, the present results suggest a dose-related effect of ferric citrate supplementation on AGE metabolism, and this effect was more evident at high iron doses (>1 g of ferric iron/kg diet).
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Affiliation(s)
- Kuo-Ching Chao
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Taipei Medical University Hospital, Taipei, Taiwan.,Division of Gastroenterology and Hepatology, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Seu-Hwa Chen
- Department of Anatomy and Cell Biology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Chun-Chao Chang
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Taipei Medical University Hospital, Taipei, Taiwan.,Division of Gastroenterology and Hepatology, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yu-Chieh Lee
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Chi-Mei Wang
- Department of Nutrition, MacKay Memorial Hospital, Hsinchu Branch, Hsinchu, Taiwan
| | - Jung-Su Chang
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei, Taiwan.,Nutrition Research Centre, Taipei Medical University Hospital, Taipei, Taiwan
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