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Lv H, Wang Y, Liu J, Zhen C, Zhang X, Liu Y, Lou C, Guo H, Wei Y. Exposure to a static magnetic field attenuates hepatic damage and function abnormality in obese and diabetic mice. Biochim Biophys Acta Mol Basis Dis 2023; 1869:166719. [PMID: 37116230 DOI: 10.1016/j.bbadis.2023.166719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 03/29/2023] [Accepted: 04/07/2023] [Indexed: 04/30/2023]
Abstract
Static magnetic fields (SMFs) exhibit significant effect on health care. However, the effect of SMF on hepatic metabolism and function in obesity and diabetes are still unknown. Liver is not only the main site for glucolipid metabolism but also the core part for iron metabolism regulation. Dysregulations of iron metabolism and redox status are risk factors for the development of hepatic injury and affect glucolipid metabolism in obesity and diabetes. Mice of HFD-induced obesity and HFD/streptozocin-induced diabetes were exposed to a moderate-intensity SMF (0.4-0.7 T, direction: upward, 4 h/day, 8 weeks). Results showed that SMF attenuated hepatic damage by decreasing inflammation and fibrosis in obese and diabetic mice. SMF had no effects on improving glucose/insulin tolerance but regulated proteins (GLUT1 and GLUT4) and genes (G6pc, Pdk4, Gys2 and Pkl) participating in glucose metabolism with phosphorylation of Akt/AMPK/GSK3β. SMF also reduced lipid droplets accumulation through decreasing Plin2 and Plin5 and regulated lipid metabolism with elevated hepatic expressions of PPARγ and C/EBPα in obese mice. In addition, SMF decreased hepatic iron deposition with lower FTH1 expression and modulated systematic iron homeostasis via BMP6-mediated regulation of hepcidin. Moreover, SMF balanced hepatic redox status with regulation on mitochondrial function and MAPKs/Nrf2/HO-1 pathway. Finally, we found that SMF activated hepatic autophagy and enhanced lipophagy by upregulating PNPLA2 expression in obese and diabetic mice. Our results demonstrated that SMF significantly ameliorated the development of hepatic injury in obese and diabetic mice by inhibiting inflammatory level, improving glycolipid metabolism, regulating iron metabolism, balancing redox level and activating autophagy.
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Affiliation(s)
- Huanhuan Lv
- School of Life Sciences, Northwestern Polytechnical University, Xi'an, China; Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, China.
| | - Yijia Wang
- School of Life Sciences, Northwestern Polytechnical University, Xi'an, China; Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, China; Liangzhu Laboratory, Zhejiang University Medical Center, Hangzhou, China
| | - Junyu Liu
- School of Life Sciences, Northwestern Polytechnical University, Xi'an, China; Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, China
| | - Chenxiao Zhen
- School of Life Sciences, Northwestern Polytechnical University, Xi'an, China; Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, China
| | - Xinyi Zhang
- School of Life Sciences, Northwestern Polytechnical University, Xi'an, China
| | - Yuetong Liu
- School of Life Sciences, Northwestern Polytechnical University, Xi'an, China; Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, China
| | - Chenge Lou
- School of Life Sciences, Northwestern Polytechnical University, Xi'an, China; Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, China
| | - Huijie Guo
- School of Life Sciences, Northwestern Polytechnical University, Xi'an, China; Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, China
| | - Yunpeng Wei
- School of Medicine, Shenzhen University, Shenzhen, China
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Delghingaro-Augusto V, Hosaka A, Estaphan S, Richardson A, Dahlstrom JE, Nolan CJ. High Dietary Iron in Western Diet-Fed Male Rats Causes Pancreatic Islet Injury and Acute Pancreatitis. J Nutr 2023; 153:723-732. [PMID: 36931751 DOI: 10.1016/j.tjnut.2023.01.009] [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: 11/23/2022] [Revised: 12/30/2022] [Accepted: 01/06/2023] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND High dietary iron has been linked to an increased type 2 diabetes risk. We have previously shown that intrauterine growth restriction (IUGR) and feeding a Western diet (WD) to male Sprague-Dawley rats independently, as well as together, cause pancreatic islet inflammation, fibrosis, and hemosiderosis. OBJECTIVES To investigate whether iron has a role in the pathogenesis of this inflammatory islet injury caused by IUGR and WD intake. METHODS Male Sprague-Dawley offspring of bilateral uterine artery ligated (IUGR) and sham-operated (Sham) dams, fostered to nonoperated dams, were fed a WD [45% sucrose, 19.4% protein and 23% fat (w/w)] containing low iron (LI, 20 mg/kg) or high iron (HI, 500 mg/kg) from weaning. Four groups were studied: Sham-LI, Sham-HI, IUGR-LI, and IUGR-HI. Serial measurements of rat body weight, blood glucose, lipids and insulin, an intraperitoneal glucose tolerance test (age 13 wk), and histological analysis of pancreas and liver (age 14 wk) were recorded. The effects of iron, IUGR, and their interaction, on these measurements have been analyzed. RESULTS WD with HI compared with LI caused an 11% greater weight gain by age 14 wk (P < 0.001), impaired glucose tolerance [AUC for glucose (G-AUC) 17% higher; P < 0.001), acute pancreatitis (17/18, HI; 6/17, LI; P < 0.001), pancreas-associated fat necrosis and saponification (7/18, HI; 0/17 LI; P < 0.01), and a trend to islet fibrotic injury (7/18, HI; 1/17 LI; P = 0.051). Although pancreatic and hepatic steatosis was evident in almost all WD-fed rats, pancreatic and hepatic iron accumulation was prevalent only in HI-fed rats (P < 0.0001 for both), being only mild in the livers. IUGR, independent of dietary iron, also caused impairment in glucose tolerance (G-AUC: 17% higher; P < 0.05). CONCLUSIONS A postweaning WD containing HI, independent of IUGR, causes acute pancreatitis and islet injury in Sprague-Dawley rats suggesting a role of dietary iron in the development of steatopancreatitis.
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Affiliation(s)
- Viviane Delghingaro-Augusto
- Australian National University Medical School, Australian National University, Canberra, Australia; Department of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australia.
| | - Ayumi Hosaka
- Faculty of Veterinary Science, University of Sydney, Camperdown, Australia; Pre-Clinical Research Services and Education, The Canberra Hospital, Garran, Australia
| | - Suzanne Estaphan
- Australian National University Medical School, Australian National University, Canberra, Australia
| | - Alice Richardson
- Statistical Support Network, Australian National University, Canberra, Australia
| | - Jane E Dahlstrom
- Australian National University Medical School, Australian National University, Canberra, Australia; Department of Anatomical Pathology, ACT Pathology, The Canberra Hospital, Australia
| | - Christopher J Nolan
- Australian National University Medical School, Australian National University, Canberra, Australia; Department of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australia; Department of Endocrinology, The Canberra Hospital, Garran, Australia
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Qiu F, Wu L, Yang G, Zhang C, Liu X, Sun X, Chen X, Wang N. The role of iron metabolism in chronic diseases related to obesity. Mol Med 2022; 28:130. [PMID: 36335331 PMCID: PMC9636637 DOI: 10.1186/s10020-022-00558-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 10/14/2022] [Indexed: 11/08/2022] Open
Abstract
Obesity is one of the major public health problems threatening the world, as well as a potential risk factor for chronic metabolic diseases. There is growing evidence that iron metabolism is altered in obese people, however, the highly refined regulation of iron metabolism in obesity and obesity-related complications is still being investigated. Iron accumulation can affect the body’s sensitivity to insulin, Type 2 diabetes, liver disease and cardiovascular disease. This review summarized the changes and potential mechanisms of iron metabolism in several chronic diseases related to obesity, providing new clues for future research.
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Kassem E, Na’amnih W, Shapira M, Ornoy A, Muhsen K. Comparison between School-Age Children with and without Obesity in Nutritional and Inflammation Biomarkers. J Clin Med 2022; 11:jcm11236973. [PMID: 36498548 PMCID: PMC9739253 DOI: 10.3390/jcm11236973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 11/20/2022] [Accepted: 11/23/2022] [Indexed: 11/29/2022] Open
Abstract
Childhood obesity is a major health problem. We examined differences between children with obesity and normal weight in nutritional and inflammation biomarkers. A cross-sectional study was conducted among healthy children aged 10-12 years from Arab villages in Israel. Parents were interviewed regarding sociodemographic and children's health status. Body weight and height measurements were performed and weight categories were defined using the 2007 WHO growth curves. Blood samples were tested for complete blood count, levels of iron, ferritin, lipids, uric acid, and C-reactive protein (CRP). Overall, 146 children (59.0% males, mean age = 11.3 [SD = 0.5]) were enrolled. In total 43.8%, 14.1% and 42.3% of the participants had normal weight, overweight and obesity, respectively. A multivariable logistic regression model showed that children with overweight and obesity had lower iron, and HDL-C levels than children with normal weight. Levels of CRP, uric acid, LDL-C and lymphocytes were higher among children with overweight and obesity. In conclusion, our findings highlight the worse metabolic and nutritional status in overweight and obese children. Such markers play a role in metabolic syndrome, thus suggesting that metabolic syndrome might start in childhood.
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Affiliation(s)
- Eias Kassem
- Department of Pediatrics, Hillel Yaffe Medical Center, Hadera 3810101, Israel
- Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa 3109601, Israel
| | - Wasef Na’amnih
- Department of Epidemiology and Preventive Medicine, School of Public Health, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Maanit Shapira
- Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa 3109601, Israel
- Laboratory Division, Hillel Yaffe Medical Center, Hadera 3810101, Israel
| | - Asher Ornoy
- Adelson School of Medicine, Ariel University, Ariel 4077625, Israel
- Laboratory of Teratology, Department of Medical Neurobiology, The Hebrew University Hadassah Medical School, Jerusalem 9112002, Israel
| | - Khitam Muhsen
- Department of Epidemiology and Preventive Medicine, School of Public Health, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
- Correspondence: ; Tel.: +972-3-6405945
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Kim SL, Shin S, Yang SJ. Iron Homeostasis and Energy Metabolism in Obesity. Clin Nutr Res 2022; 11:316-330. [PMID: 36381472 PMCID: PMC9633967 DOI: 10.7762/cnr.2022.11.4.316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 10/18/2022] [Indexed: 01/24/2023] Open
Abstract
Iron plays a role in energy metabolism as a component of vital enzymes and electron transport chains (ETCs) for adenosine triphosphate (ATP) synthesis. The tricarboxylic acid (TCA) cycle and oxidative phosphorylation are crucial in generating ATP in mitochondria. At the mitochondria matrix, heme and iron-sulfur clusters are synthesized. Iron-sulfur cluster is a part of the aconitase in the TCA cycle and a functional or structural component of electron transfer proteins. Heme is the prosthetic group for cytochrome c, a principal component of the respiratory ETC. Regarding fat metabolism, iron regulates mitochondrial fat oxidation and affects the thermogenesis of brown adipose tissue (BAT). Thermogenesis is a process that increases energy expenditure, and BAT is a tissue that generates heat via mitochondrial fuel oxidation. Iron deficiency may impair mitochondrial fuel oxidation by inhibiting iron-containing molecules, leading to decreased energy expenditure. Although it is expected that impaired mitochondrial fuel oxidation may be restored by iron supplementation, its underlying mechanisms have not been clearly identified. Therefore, this review summarizes the current evidence on how iron regulates energy metabolism considering the TCA cycle, oxidative phosphorylation, and thermogenesis. Additionally, we relate iron-mediated metabolic regulation to obesity and obesity-related complications.
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Affiliation(s)
- Se Lin Kim
- Department of Food and Nutrition, Seoul Women’s University, Seoul 01797, Korea
| | - Sunhye Shin
- Department of Food and Nutrition, Seoul Women’s University, Seoul 01797, Korea
| | - Soo Jin Yang
- Department of Food and Nutrition, Seoul Women’s University, Seoul 01797, Korea
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6
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Wang Y, Liu F, Yi Q, Wang M, Wang J. Design, synthesis and biological evaluation of novel dual-targeting fluorescent probes for detection of Fe 3+ in the lysosomes of hepatocytes mediated by galactose-morpholine moieties. Talanta 2022; 243:123362. [PMID: 35276499 DOI: 10.1016/j.talanta.2022.123362] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 02/15/2022] [Accepted: 03/02/2022] [Indexed: 10/18/2022]
Abstract
In this work, novel dual-targeting probes composed of galactose and morpholine were designed and synthesized for monitoring Fe3+ levels in the lysosome of hepatocyte. MP-Gal-1, MP-Gal-2 and MP-Gal-3 showed good selectivity and sensitivities toward Fe3+ with the detection limits of 9.40 × 10-8 M, 7.68 × 10-8 M and 7.10 × 10-8 M, respectively. 1:2 stoichiometry is the most likely recognition mode between probe and Fe3+. Low toxic MP-Gal-1, MP-Gal-2 and MP-Gal-3 exhibited favorable hepatic targeting effect in both cell and tissue levels, which was because the galactose group of probe could be recognized by ASGPR overexpressed on the hepatocytes. The hepatocyte-targeting capacity followed MP-Gal-1 < MP-Gal-2 < MP-Gal-3 trend, which was attributed to the galactose cluster effect. MP-Gal-1, MP-Gal-2 and MP-Gal-3 also displayed good lysosomes-targeting capacities, because the basic morpholine moiety of probes could be easily attracted by the acidic lysosome. Therefore, MP-Gal-1, MP-Gal-2 and MP-Gal-3 have good dual targeting capacities (liver and lysosome) and could be used to detect lysosomal Fe3+ in the liver, which is great significant for precise diagnosis and treatment of liver lysosomal iron-related diseases.
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Affiliation(s)
- Yan Wang
- College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Feiyang Liu
- Medical College, Guangxi University, Nanning, 530004, China
| | - Qingyuan Yi
- Medical College, Guangxi University, Nanning, 530004, China
| | - Mian Wang
- College of Life Science and Technology, Guangxi University, Nanning, 530004, China.
| | - Jianyi Wang
- Medical College, Guangxi University, Nanning, 530004, China.
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7
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Shin S, Ajuwon KM. Effect of lipopolysaccharide on peripheral tissue and hypothalamic expression of metabolic and inflammatory markers in mice fed high-fat diets with distinct 18-carbon fatty acid composition. Lipids 2021; 56:509-519. [PMID: 34212398 DOI: 10.1002/lipd.12318] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 06/03/2021] [Accepted: 06/18/2021] [Indexed: 01/22/2023]
Abstract
Physiological and metabolic effects of fatty acids are determined by their degree of saturation and chain length. Effects of 18-carbon fatty acids with various degrees of saturation on inflammatory, oxidative, and neuropeptide gene transcription, especially in the hypothalamus, in response to LPS-induced acute inflammation have not been well studied. We conducted this study to test whether diets with distinct 18-carbon fatty acid differentially affect inflammatory and metabolic response to LPS exposure in the hypothalamus, liver, and muscle tissues. Four experimental diets were fed for 4 weeks to male C57BL/6J mice, and a terminal 4-h lipopolysaccharide (LPS) injection was administered. Diets included a control diet (CON) containing 5.6% kcal fat from lard and 4.4% kcal fat from soybean oil, and three high-fat diets (HFD) containing 25% kcal fat from lard and 20% kcal fat from either shea butter (SHB; saturated fatty acid-rich fat), olive oil (OLO; monounsaturated fatty acid-rich oil), or soybean oil (SBO; polyunsaturated fatty acid-rich fat). Compared to CON, HFD-fed mice had higher weight gain and body fat accumulation. The SBO group had lowest Cpt1b expression in the liver, and OLO group had the lowest Pomc and the highest Lepr expression in the hypothalamus. LPS challenge increased pro-inflammatory cytokine mRNA expression in the brain and peripheral tissues. However, the diets did not exert distinguishable effects on LPS-induced inflammatory responses. Therefore, saturation degree of 18-carbon fatty acids may not play a critical role in their effects on inflammatory and metabolic indicators in response to acute inflammation induced by LPS.
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Affiliation(s)
- Sunhye Shin
- Major of Food and Nutrition, Division of Applied Food System, Seoul Women's University, Seoul, Korea.,Interdepartmental Nutrition Program, Purdue University, West Lafayette, Indiana, USA
| | - Kolapo M Ajuwon
- Interdepartmental Nutrition Program, Purdue University, West Lafayette, Indiana, USA.,Department of Animal Sciences, Purdue University, West Lafayette, Indiana, USA
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8
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Sandvik J, Bjerkan KK, Græslie H, Hoff DAL, Johnsen G, Klöckner C, Mårvik R, Nymo S, Hyldmo ÅA, Kulseng BE. Iron Deficiency and Anemia 10 Years After Roux-en-Y Gastric Bypass for Severe Obesity. Front Endocrinol (Lausanne) 2021; 12:679066. [PMID: 34630319 PMCID: PMC8493084 DOI: 10.3389/fendo.2021.679066] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 09/02/2021] [Indexed: 11/13/2022] Open
Abstract
Iron deficiency with or without anemia is a well-known long-term complication after Roux-en-Y, gastric bypass (RYGB) as the procedure alters the gastrointestinal absorption of iron. Iron is essential for hemoglobin synthesis and a number of cellular processes in muscles, neurons, and other organs. Ferritin is the best marker of iron status, and in a patient without inflammation, iron deficiency occurs when ferritin levels are below 15 µg/L, while iron insufficiency occurs when ferritin levels are below 50 µg/L. Lifelong regular blood tests are recommended after RYGB, but the clinical relevance of iron deficiency and iron insufficiency might be misjudged as long as the hemoglobin levels are normal. The aim of this study was to explore the frequency of iron deficiency and iron deficiency anemia one decade or more after RYGB, the use of per oral iron supplements, and the frequency of intravenous iron treatment. Nine hundred and thirty patients who underwent RYGB for severe obesity at three public hospitals in Norway in the period 2003-2009 were invited to a follow-up visit 10-15 years later. Results from blood tests and survey data on the use of oral iron supplements and intravenous iron treatment were analyzed. Ferritin and hemoglobin levels more than 10 years after RYGB were available on 530 patients [423 (79.8%) women]. Median (IQR) ferritin was 33 (16-63) µg/L, and mean (SD) hemoglobin was 13.4 (1.3) g/dl. Iron deficiency (ferritin ≤ 15 µg/L) was seen in 125 (23.6%) patients; in addition, iron insufficiency (ferritin 16-50 µg/L) occurred in 233 (44%) patients. Mean (SD) hemoglobin levels were 12.5 (1.4) g/dl in patients with iron deficiency, 13.5 (1.2) g/dl in patients with iron insufficiency, 13.8 (1.3) g/dl in the 111 (21%) patients with ferritin 51-100 µg/L, and 13.8 (1.2) g/dl in the 55 (10%) patients with ferritin >100 µg/L. Two hundred and seventy-five (56%) patients reported taking oral iron supplements, and 138 (27.5%) had received intravenous iron treatment after the RYGB procedure. Iron deficiency or iron insufficiency occurred in two-thirds of the patients 10 years after RYGB, although more than half of them reported taking oral iron supplements.
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Affiliation(s)
- Jorunn Sandvik
- Department of Surgery, Møre and Romsdal Hospital trust, Ålesund, Norway
- Centre for Obesity Research, Clinic of Surgery, St. Olav’s University Hospital, Trondheim, Norway
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway
- *Correspondence: Jorunn Sandvik,
| | - Kirsti Kverndokk Bjerkan
- Department of Surgery, Møre and Romsdal Hospital trust, Ålesund, Norway
- Faculty of Social Science and History, Volda University College, Volda, Norway
| | - Hallvard Græslie
- Clinic of Surgery, Namsos Hospital, Nord-Trøndelag Hospital Trust, Namsos, Norway
| | - Dag Arne Lihaug Hoff
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway
- Department of Research and Innovation, Møre and Romsdal Hospital Trust, Ålesund, Norway
| | - Gjermund Johnsen
- Centre for Obesity Research, Clinic of Surgery, St. Olav’s University Hospital, Trondheim, Norway
- Norwegian National Advisory Unit on Advanced Laparoscopic Surgery, Clinic of Surgery, St. Olav’s University Hospital, Trondheim, Norway
| | - Christian Klöckner
- Centre for Obesity Research, Clinic of Surgery, St. Olav’s University Hospital, Trondheim, Norway
- Department of Psychology, Norwegian University of Science and Technology, Trondheim, Norway
| | - Ronald Mårvik
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway
- Norwegian National Advisory Unit on Advanced Laparoscopic Surgery, Clinic of Surgery, St. Olav’s University Hospital, Trondheim, Norway
| | - Siren Nymo
- Centre for Obesity Research, Clinic of Surgery, St. Olav’s University Hospital, Trondheim, Norway
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway
- Clinic of Surgery, Namsos Hospital, Nord-Trøndelag Hospital Trust, Namsos, Norway
| | - Åsne Ask Hyldmo
- Centre for Obesity Research, Clinic of Surgery, St. Olav’s University Hospital, Trondheim, Norway
| | - Bård Eirik Kulseng
- Centre for Obesity Research, Clinic of Surgery, St. Olav’s University Hospital, Trondheim, Norway
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway
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Ghio AJ, Soukup JM, Ghio C, Gordon CJ, Richards JE, Schladweiler MC, Snow SJ, Kodavanti UP. Iron and zinc homeostases in female rats with physically active and sedentary lifestyles. Biometals 2020; 34:97-105. [PMID: 33237470 DOI: 10.1007/s10534-020-00266-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 10/28/2020] [Indexed: 12/14/2022]
Abstract
To determine the effects of repeated physical activity on iron and zinc homeostases in a living system, we quantified blood and tissue levels of these two metals in sedentary and physically active Long-Evans rats. At post-natal day (PND) 22, female rats were assigned to either a sedentary or an active treatment group (n = 10/group). The physically active rats increased their use of a commercially-constructed stainless steel wire wheel so that, by the end of the study (PND 101), they were running an average of 512.8 ± 31.9 (mean ± standard error) min/night. After euthanization, plasma and aliquots of liver, lung, heart, and gastrocnemius muscle were obtained. Following digestion, non-heme iron and zinc concentrations in plasma and tissues were measured using inductively coupled plasma optical emission spectroscopy. Concentrations of both non-heme iron and zinc in plasma and liver were significantly decreased among the physically active rats relative to the sedentary animals. In the lung, both metals were increased in concentration among the physically active animals but the change in zinc did not reach significance. Similarly, tissue non-heme iron and zinc levels were both increased in heart and muscle from the physically active group. It is concluded that repeated physical activity in an animal model can be associated with a translocation of both iron and zinc from sites of storage (e.g. liver) to tissues with increased metabolism (e.g. the lung, heart, and skeletal muscle).
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Affiliation(s)
- Andrew J Ghio
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Chapel Hill, NC, 27599, USA.
| | - Joleen M Soukup
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Chapel Hill, NC, 27599, USA
| | - Caroline Ghio
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Chapel Hill, NC, 27599, USA
| | - Christopher J Gordon
- Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Judy E Richards
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Mette C Schladweiler
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Samantha J Snow
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Urmila P Kodavanti
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
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Xie WQ, Xiao WF, Tang K, Wu YX, Hu PW, Li YS, Duan Y, Lv S. Caloric restriction: implications for sarcopenia and potential mechanisms. Aging (Albany NY) 2020; 12:24441-24452. [PMID: 33226962 PMCID: PMC7762489 DOI: 10.18632/aging.103987] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 08/14/2020] [Indexed: 12/23/2022]
Abstract
Sarcopenia is a potential risk factor for weakness, disability and death in elderly individuals. Therefore, seeking effective methods to delay and treat sarcopenia and to improve the quality of life of elderly individuals is a trending topic in geriatrics. Caloric restriction (CR) is currently recognized as an effective means to extend the lifespan and delay the decline in organ function caused by aging. In this review, we describe the effects of CR on improving muscle protein synthesis, delaying muscle atrophy, regulating muscle mitochondrial function, maintaining muscle strength, promoting muscle stem cell (MuSC) regeneration and differentiation, and thus protecting against sarcopenia. We also summarize the possible cellular mechanisms by which CR delays sarcopenia. CR can delay sarcopenia by reducing the generation of oxygen free radicals, reducing oxidative stress damage, enhancing mitochondrial function, improving protein homeostasis, reducing iron overload, increasing autophagy and apoptosis, and reducing inflammation. However, the relationships between CR and genetics, sex, animal strain, regimen duration and energy intake level are complex. Therefore, further study of the proper timing and application method of CR to prevent sarcopenia is highly important for the aging population.
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Affiliation(s)
- Wen-Qing Xie
- Deparment of Orthopedics, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Wen-Feng Xiao
- Deparment of Orthopedics, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Kun Tang
- Discipline Construction Office, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Yu-Xiang Wu
- School of Kinesiology, Jianghan University, Wuhan 430056, China
| | - Pei-Wu Hu
- Department of Scientific Research, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Yu-Sheng Li
- Deparment of Orthopedics, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Yu Duan
- Department of Geriatric Endocrinology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu, China
| | - Shan Lv
- Department of Geriatric Endocrinology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu, China
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Chronic intermittent hypobaric hypoxia improves markers of iron metabolism in a model of dietary-induced obesity. JOURNAL OF INFLAMMATION-LONDON 2020; 17:36. [PMID: 33292270 PMCID: PMC7648949 DOI: 10.1186/s12950-020-00265-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Accepted: 10/28/2020] [Indexed: 12/21/2022]
Abstract
BACKGROUND Obesity, a risk factor for many chronic diseases, is a potential independent risk factor for iron deficiency. Evidence has shown that chronic intermittent hypobaric hypoxia (CIHH) has protective or improved effects on cardiovascular, nervous, metabolic and immune systems. We hypothesized that CIHH may ameliorate the abnormal iron metabolism in obesity. This study was aimed to investigate the effect and the underlying mechanisms of CIHH on iron metabolism in high-fat-high-fructose-induced obese rats. METHODS Six to seven weeks old male Sprague-Dawley rats were fed with different diet for 16 weeks, and according to body weight divided into four groups: control (CON), CIHH (28-day, 6-h daily hypobaric hypoxia treatment simulating an altitude of 5000 m), dietary-induced obesity (DIO; induced by high fat diet and 10% fructose water feeding), and DIO + CIHH groups. The body weight, systolic arterial pressure (SAP), Lee index, fat coefficient, blood lipids, blood routine, iron metabolism parameters, interleukin6 (IL-6) and erythropoietin (Epo) were measured. The morphological changes of the liver, kidney and spleen were examined. Additionally, hepcidin mRNA expression in liver was analyzed. RESULTS The DIO rats displayed obesity, increased SAP, lipids metabolism disorders, damaged morphology of liver, kidney and spleen, disturbed iron metabolism, increased IL-6 level and hepcidin mRNA expression, and decreased Epo compared to CON rats. But all the aforementioned abnormalities in DIO rats were improved in DIO + CIHH rats. CONCLUSIONS CIHH improves iron metabolism disorder in obese rats possibly through the down-regulation of hepcidin by decreasing IL-6 and increasing Epo.
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Staniek HZ, Król E, Wójciak RW. The Interactive Effect of High Doses of Chromium(III) and Different Iron(III) Levels on the Carbohydrate Status, Lipid Profile, and Selected Biochemical Parameters in Female Wistar Rats. Nutrients 2020; 12:nu12103070. [PMID: 33050015 PMCID: PMC7599772 DOI: 10.3390/nu12103070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 10/04/2020] [Accepted: 10/06/2020] [Indexed: 12/14/2022] Open
Abstract
The aim of the study was to evaluate the main and interactive effects of chromium(III) propionate complex (Cr3) supplementation and different iron supply on the carbohydrate metabolism, lipid profile and other selected biochemical parameters of rats. The experiment was carried out in a two-factor design, in which rats were fed a diet with different proportions of Fe(III) and Cr(III) for six weeks. Fifty-four healthy female Wistar rats were divided into nine experimental groups with different Fe(III) levels, i.e. adequate-control group (45 mg/kg)-100% recommended daily dietary dose of Fe for rodents, deficient (5 mg/kg) and oversupply (180 mg/kg-400%). At the same time they were supplemented with Cr(III) of doses 1 (adequate), 50 and 500 mg/kg of diet. The activity and concentrations of most biochemical parameters were measured with standard enzymatic, kinetic, and colorimetric methods. HOMA-IR and QUICKI indexes were calculated according to appropriate formulas. It was found that there was an interactive effect of high Cr(III) doses and different Fe(III) levels in the diet on the carbohydrate metabolism and insulin resistance indexes. The presented results suggested that iron deficient diet fed animals led to insulin resistance; however, an effect is attenuated by Cr(III) supplementation at high doses. There were no significant changes in the rats' lipid profile (except for the high density lipoprotein cholesterol (HDL-C) level) and most of the other biochemical parameters, such as the leptin, aspartate aminotransferase (AST), alanine transaminase (ALT), total protein (TP), creatinine (Crea) and the urea (BUN) concentrations. The study proved that the Cr(III) supplementation, independently and in combination with diversified Fe(III) content in the diet, affected the carbohydrate metabolism and insulin resistance indexes but did not affect lipid profile and most of the other biochemical parameters in healthy rats. The findings proved the role of Fe and Cr(III) and their interactions on disturbances carbohydrates metabolism.
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Affiliation(s)
- Halina Zofia Staniek
- Department of Human Nutrition and Dietetics, Poznan University of Life Sciences, 60-624 Poznan, Poland;
- Correspondence: ; Tel.: +48-(61)-8487334
| | - Ewelina Król
- Department of Human Nutrition and Dietetics, Poznan University of Life Sciences, 60-624 Poznan, Poland;
| | - Rafał Wojciech Wójciak
- Department of Clinical Psychology, Poznan University of Medical Sciences, 60-812 Poznan, Poland;
- Department of Dietetics, Faculty of Physical Culture in Gorzow Wielkopolski, Poznan University of Physical Education, 61-871 Poznan, Poland
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Iron Metabolism in Obesity and Metabolic Syndrome. Int J Mol Sci 2020; 21:ijms21155529. [PMID: 32752277 PMCID: PMC7432525 DOI: 10.3390/ijms21155529] [Citation(s) in RCA: 82] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 07/27/2020] [Accepted: 07/29/2020] [Indexed: 12/12/2022] Open
Abstract
Obesity is an excessive adipose tissue accumulation that may have detrimental effects on health. Particularly, childhood obesity has become one of the main public health problems in the 21st century, since its prevalence has widely increased in recent years. Childhood obesity is intimately related to the development of several comorbidities such as nonalcoholic fatty liver disease, dyslipidemia, type 2 diabetes mellitus, non-congenital cardiovascular disease, chronic inflammation and anemia, among others. Within this tangled interplay between these comorbidities and associated pathological conditions, obesity has been closely linked to important perturbations in iron metabolism. Iron is the second most abundant metal on Earth, but its bioavailability is hampered by its ability to form highly insoluble oxides, with iron deficiency being the most common nutritional disorder. Although every living organism requires iron, it may also cause toxic oxygen damage by generating oxygen free radicals through the Fenton reaction. Thus, iron homeostasis and metabolism must be tightly regulated in humans at every level (i.e., absorption, storage, transport, recycling). Dysregulation of any step involved in iron metabolism may lead to iron deficiencies and, eventually, to the anemic state related to obesity. In this review article, we summarize the existent evidence on the role of the most recently described components of iron metabolism and their alterations in obesity.
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Development of insulin resistance preceded major changes in iron homeostasis in mice fed a high-fat diet. J Nutr Biochem 2020; 84:108441. [PMID: 32629238 PMCID: PMC7115812 DOI: 10.1016/j.jnutbio.2020.108441] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 03/10/2020] [Accepted: 05/22/2020] [Indexed: 02/06/2023]
Abstract
Type 2 diabetes mellitus (T2DM) and insulin resistance (IR) have been associated with dysregulation of iron metabolism. The basis for this association is not completely understood. To attempt to investigate this, we studied temporal associations between onset of insulin resistance (IR) and dysregulated iron homeostasis, in a mouse model of T2DM. Male C57Bl/6 mice (aged 8 weeks) were fed a high-fat diet (HFD; 60% energy from fat) or a control diet (CD; 10% energy from fat) for 4, 8, 12, 16, 20 and 24 weeks. Development of IR was documented, and various metabolic, inflammatory and iron-related parameters were studied in these mice. HFD-feeding induced weight gain, hepato-steatosis and IR in the mice. Onset of IR occurred from 12 weeks onwards. Hepatic iron stores progressively declined from 16 weeks onwards. Accompanying changes included a decrease in hepatic hepcidin (Hamp1) mRNA expression and serum hepcidin levels and an increase in iron content in the epididymal white adipose tissue (eWAT). Iron content in the liver negatively correlated with that in the eWAT. Factors known to regulate hepatic Hamp1 expression (such as serum iron levels, systemic inflammation, and bone marrow-derived erythroid regulators) were not affected by HFD-feeding. In conclusion, the results show that the onset of IR in HFD-fed mice preceded dysregulation of iron homeostasis, evidence of which were found both in the liver and visceral adipose tissue.
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Higashida K, Takeuchi N, Inoue S, Hashimoto T, Nakai N. Iron deficiency attenuates catecholamine‑stimulated lipolysis via downregulation of lipolysis‑related proteins and glucose utilization in 3T3‑L1 adipocytes. Mol Med Rep 2020; 21:1383-1389. [PMID: 32016466 DOI: 10.3892/mmr.2020.10929] [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: 07/17/2019] [Accepted: 10/29/2019] [Indexed: 11/06/2022] Open
Abstract
Iron deficiency has been associated with obesity and related metabolic disorders. The aim of the present study was to evaluate the effect of iron deficiency on fat metabolism, particularly regarding the lipolytic activity, lipolysis‑related protein expression, and glucose utilization of adipocytes. Differentiated 3T3‑L1 adipocytes were incubated with an iron chelator, deferoxamine mesylate (DFO), for 48 h. Subsequently, basal and isoproterenol‑stimulated lipolytic activities, the proteins involved in lipolysis and glucose utilization were compared with a control (CON). The results revealed that treatment with DFO significantly decreased the free iron content but did not affect total protein and lipid contents in adipocytes. Iron deprivation caused a significant reduction in isoproterenol‑stimulated lipolysis, but not basal lipolysis. Lipolysis‑related proteins, including perilipin A, adipose triglyceride lipase, hormone sensitive lipase and comparative gene identification‑58, were decreased in the DFO compared with the CON group. Furthermore, glucose utilization, a major precursor of 3‑glycerol phosphate for micro‑lipid droplet synthesis during lipolysis and the expression of glucose transporter (GLUT) 4 were significantly lower in the DFO group when compared with the CON group. However, hypoxia‑inducible factor‑1α and GLUT1 expressions were upregulated in DFO‑treated adipocytes. In conclusion, the results indicated that low iron availability attenuated catecholamine‑stimulated lipolysis by downregulating lipolytic enzymes and glucose utilization in 3T3‑L1 adipocytes.
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Affiliation(s)
- Kazuhiko Higashida
- Department of Nutrition, Laboratory of Exercise Nutrition, University of Shiga Prefecture, Hikone, Shiga 522‑8533, Japan
| | - Nodoka Takeuchi
- Department of Nutrition, Laboratory of Exercise Nutrition, University of Shiga Prefecture, Hikone, Shiga 522‑8533, Japan
| | - Sachika Inoue
- Department of Nutrition, Laboratory of Exercise Nutrition, University of Shiga Prefecture, Hikone, Shiga 522‑8533, Japan
| | - Takeshi Hashimoto
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga 525‑8577, Japan
| | - Naoya Nakai
- Department of Nutrition, Laboratory of Exercise Nutrition, University of Shiga Prefecture, Hikone, Shiga 522‑8533, Japan
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Moreno-Fernandez J, Díaz-Castro J, Alférez MJM, López-Aliaga I. Iron Deficiency and Neuroendocrine Regulators of Basal Metabolism, Body Composition and Energy Expenditure in Rats. Nutrients 2019; 11:nu11030631. [PMID: 30875895 PMCID: PMC6470997 DOI: 10.3390/nu11030631] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 03/10/2019] [Accepted: 03/12/2019] [Indexed: 12/21/2022] Open
Abstract
Although dietary iron is a determinant of iron status in animals, body fat mass has been reported to have an inverse association with iron status in human studies. The goal of this study was to determine the relationship between Fe homeostasis, body composition, energy expenditure and neuroendocrine regulators for severe Fe-deficiency anaemia. Forty male Wistar albino rats recently weaned were divided at random into two groups: the control group was fed the basal diet, AIN-93G diet (normal-Fe) and the anaemic group received a low-Fe diet for 40 days. Neuroendocrine parameters that regulate basal metabolism and appetite (thyroid hormones, ghrelin, glucose-dependent insulinotropic polypeptide (GIP), glucagon, insulin, adrenocorticotropic hormone and corticosterone), body composition, respiratory volumes, energy expenditure, haematological and biochemical were assessed. Total body fat was lower, whereas lean mass, free and total water were higher in the anemic group. O2 consumption, CO2 production, energy expenditure (EE) and respiratory quotient (RQ) were lower in the Fe-deficient animals. Triiodothyronine and thyroxine hormones decreased, while thyroid-stimulating hormone increased in the anemic group. Circulating levels of ghrelin were lower in the anemic group, while GIP, glucagon, insulin, corticosterone and adrenocorticotropic hormone levels were higher. Fe-deficiency impairs weight gain in the rats, with marked reductions in lean mass and body fat, indicating lower energy stores.
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Affiliation(s)
- Jorge Moreno-Fernandez
- Department of Physiology (Faculty of Pharmacy, Campus Universitario de Cartuja) and Institute of Nutrition and Food Technology "José Mataix", University of Granada, E-18071 Granada, Spain.
| | - Javier Díaz-Castro
- Department of Physiology (Faculty of Pharmacy, Campus Universitario de Cartuja) and Institute of Nutrition and Food Technology "José Mataix", University of Granada, E-18071 Granada, Spain.
| | - María J M Alférez
- Department of Physiology (Faculty of Pharmacy, Campus Universitario de Cartuja) and Institute of Nutrition and Food Technology "José Mataix", University of Granada, E-18071 Granada, Spain.
| | - Inmaculada López-Aliaga
- Department of Physiology (Faculty of Pharmacy, Campus Universitario de Cartuja) and Institute of Nutrition and Food Technology "José Mataix", University of Granada, E-18071 Granada, Spain.
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Ferroportin-Hepcidin Axis in Prepubertal Obese Children with Sufficient Daily Iron Intake. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:ijerph15102156. [PMID: 30275363 PMCID: PMC6210055 DOI: 10.3390/ijerph15102156] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 09/27/2018] [Accepted: 09/29/2018] [Indexed: 12/12/2022]
Abstract
Iron metabolism may be disrupted in obesity, therefore, the present study assessed the iron status, especially ferroportin and hepcidin concentrations, as well as associations between the ferroportin-hepcidin axis and other iron markers in prepubertal obese children. The following were determined: serum ferroportin, hepcidin, ferritin, soluble transferrin receptor (sTfR), iron concentrations and values of hematological parameters as well as the daily dietary intake in 40 obese and 40 normal-weight children. The ferroportin/hepcidin and ferritin/hepcidin ratios were almost two-fold lower in obese children (p = 0.001; p = 0.026, respectively). Similar iron concentrations (13.2 vs. 15.2 µmol/L, p = 0.324), the sTfR/ferritin index (0.033 vs. 0.041, p = 0.384) and values of hematological parameters were found in obese and control groups, respectively. Iron daily intake in the obese children examined was consistent with recommendations. In this group, the ferroportin/hepcidin ratio positively correlated with energy intake (p = 0.012), dietary iron (p = 0.003) and vitamin B12 (p = 0.024). In the multivariate regression model an association between the ferroportin/hepcidin ratio and the sTfR/ferritin index in obese children (β = 0.399, p = 0.017) was found. These associations did not exist in the controls. The results obtained suggest that in obese children with sufficient iron intake, the altered ferroportin-hepcidin axis may occur without signs of iron deficiency or iron deficiency anemia. The role of other micronutrients, besides dietary iron, may also be considered in the iron status of these children.
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