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Bi SS, Talukder M, Jin HT, Lv MW, Ge J, Zhang C, Li JL. Nano-selenium alleviates cadmium-induced cerebellar injury by activating metal regulatory transcription factor 1 mediated metal response. ANIMAL NUTRITION (ZHONGGUO XU MU SHOU YI XUE HUI) 2022; 11:402-412. [PMID: 36382201 PMCID: PMC9636061 DOI: 10.1016/j.aninu.2022.06.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Revised: 04/22/2022] [Accepted: 06/22/2022] [Indexed: 05/21/2023]
Abstract
This study aims to investigate the role of metal regulatory transcription factor 1 (MTF1)-mediated metal response in cadmium (Cd)-induced cerebellar injury, and to evaluate the antagonistic effects of nano-selenium (Nano-Se) against Cd toxicity. A total of 80 chicks (1 d old, male, Hy-Line Variety White) were randomly allocated to 4 treatment groups for 3 months: the control group (fed with a basic diet, n = 20), the Nano-Se group (basic diet with 1 mg/kg nano-Se 1 mg/kg Nano-Se in basic diet, n = 20), the Nano-Se + Cd group (basic diet with 1 mg/kg Nano-Se and 140 mg/kg CdCl2, n = 20) and the Cd group (basic diet with 140 mg/kg CdCl2 , n = 20). The results of the experiment showed that the Purkinje cells were significantly decreased with their degradation and indistinct nucleoli after Cd exposure. Moreover, exposure to Cd caused a significant accumulation of Cd and cupper. However, the contents of Se, iron, and zinc were decreased, thereby disturbing the metal homeostasis in the cerebellum. The Cd exposure also resulted in high levels of malondialdehyde (MDA) and down regulation of selenoprotein transcriptome. Furthermore, the expressions of MTF1, metallothionein 1 (MT1), MT2, zinc transporter 3 (ZNT3), ZNT5, ZNT10, zrt, irt-like protein 8 (ZIP8), ZIP10, transferrin (TF), ferroportin 1 (FPN1), ATPase copper transporting beta (ATP7B), and copper uptake protein 1 (CTR1) were inhibited by Cd exposure. However, all these changes were significantly alleviated by the supplementation of Nano-Se. This study proved that Cd could disorder metal homeostasis and induce oxidative stress, whereas Nano-Se could relieve all these negative effects caused by Cd via activating the MTF1-mediated metal response in the cerebellum of chicken.
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Affiliation(s)
- Shao-Shuai Bi
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
- College of Biotechnology and Pharmaceutical Engineering of West Anhui University, Lu’an 237012, China
| | - Milton Talukder
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
- Department of Physiology and Pharmacology, Faculty of Animal Science and Veterinary Medicine, Patuakhali Science and Technology University, Barishal, 8210, Bangladesh
| | - Hai-Tao Jin
- Quality and Safety Institute of Agricultural Products, Heilongjiang Academy of Agricultural Sciences, Harbin 150010, China
| | - Mei-Wei Lv
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Jing Ge
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Cong Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, China
| | - Jin-Long Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
- Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin 150030, China
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Northeast Agricultural University, Harbin 150030, China
- Corresponding author. College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China.
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Gebeyew K, Jiang C, Gao Q, Zhang L, Zhu H, Tian Y, Wang Q, Wei Y, Tan Z, Han X. Cadmium Accumulation in the Goat Liver and Kidney Is Partially Promoted by the Upregulation of Metal Transporter Genes. Animals (Basel) 2022; 12:ani12111408. [PMID: 35681874 PMCID: PMC9179383 DOI: 10.3390/ani12111408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 05/26/2022] [Accepted: 05/27/2022] [Indexed: 11/16/2022] Open
Abstract
Metal transporters, including divalent metal-ion transporter-1 (DMT1), Zrt-/Irt-like protein 8 and 14 (ZIP8 and ZIP14), and ferroportin-1 (FPN1), reportedly participate in cellular cadmium (Cd) uptake, but those in farm animals remain unclarified. This study aimed to examine the growth, plasma biochemical indices, Cd accumulation, and expression of metal transporter genes in the liver, kidney, and muscle of goats exposed to rice paddies contaminated with different levels of Cd. Twenty-four goats were randomly assigned across three dietary treatments: 0.23, 0.63, and 1.07 mg of Cd/kg of dry matter (DM) for 60 days. The results showed that dietary Cd exposure increased (p < 0.05) both Cd accumulation and the mRNA expressions of metal transporter genes (DMT1, ZIP, and FPN1) in the liver and kidney but not in the muscle, suggesting dietary Cd exhibited different deposition rates between goat liver, kidney, and muscle. These outcomes suggest that high levels of dietary Cd stimulated the expression of metal transporter genes and thereby enhanced the uptake and accumulation of Cd in the goat liver and kidney. As such, higher Cd concentrations in the liver and kidney observed with Cd diets could be partly explained by upregulation of metal transport genes expression.
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Affiliation(s)
- Kefyalew Gebeyew
- Key Laboratory of Animal Husbandry Science and Technology of Xinjiang Production and Construction Corps, College of Animal Science, Tarim University, Alar 843300, China; (K.G.); (C.J.); (Q.G.)
- CAS Key Laboratory for Agro-Ecological Processes in Subtropical Region, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha 410125, China; (L.Z.); (H.Z.); (Y.T.); (Q.W.); (Y.W.); (Z.T.)
| | - Chunyu Jiang
- Key Laboratory of Animal Husbandry Science and Technology of Xinjiang Production and Construction Corps, College of Animal Science, Tarim University, Alar 843300, China; (K.G.); (C.J.); (Q.G.)
| | - Qinghua Gao
- Key Laboratory of Animal Husbandry Science and Technology of Xinjiang Production and Construction Corps, College of Animal Science, Tarim University, Alar 843300, China; (K.G.); (C.J.); (Q.G.)
| | - Liping Zhang
- CAS Key Laboratory for Agro-Ecological Processes in Subtropical Region, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha 410125, China; (L.Z.); (H.Z.); (Y.T.); (Q.W.); (Y.W.); (Z.T.)
| | - Hanhua Zhu
- CAS Key Laboratory for Agro-Ecological Processes in Subtropical Region, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha 410125, China; (L.Z.); (H.Z.); (Y.T.); (Q.W.); (Y.W.); (Z.T.)
| | - Yushi Tian
- CAS Key Laboratory for Agro-Ecological Processes in Subtropical Region, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha 410125, China; (L.Z.); (H.Z.); (Y.T.); (Q.W.); (Y.W.); (Z.T.)
| | - Qi Wang
- CAS Key Laboratory for Agro-Ecological Processes in Subtropical Region, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha 410125, China; (L.Z.); (H.Z.); (Y.T.); (Q.W.); (Y.W.); (Z.T.)
| | - Yuqing Wei
- CAS Key Laboratory for Agro-Ecological Processes in Subtropical Region, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha 410125, China; (L.Z.); (H.Z.); (Y.T.); (Q.W.); (Y.W.); (Z.T.)
| | - Zhiliang Tan
- CAS Key Laboratory for Agro-Ecological Processes in Subtropical Region, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha 410125, China; (L.Z.); (H.Z.); (Y.T.); (Q.W.); (Y.W.); (Z.T.)
| | - Xuefeng Han
- CAS Key Laboratory for Agro-Ecological Processes in Subtropical Region, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha 410125, China; (L.Z.); (H.Z.); (Y.T.); (Q.W.); (Y.W.); (Z.T.)
- Correspondence: ; Tel.: +86-731-84615218; Fax: +86-731-84612685
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Abstract
Cadmium is a nonessential heavy metal and an industrial and environmental pollutant. It has been known that cadmium must enter cells to cause damage. To understand the transport systems responsible for cadmium entry into cells, it is important to determine the precise mechanisms underlying cadmium toxicity. Numerous studies have sought to unravel the exact pathways by which cadmium enters various cells and the mechanisms by which it causes toxicity in the organs of human and animals. The purpose of this review is to present the progress made regarding the mechanisms of cadmium transport in various cells and the mechanisms underlying cadmium toxicity in organs.
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Affiliation(s)
- Ken-Ichi Ohba
- Kitasato University School of Allied Health Sciences
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Shan Z, Wei Z, Shaikh ZA. Suppression of ferroportin expression by cadmium stimulates proliferation, EMT, and migration in triple-negative breast cancer cells. Toxicol Appl Pharmacol 2018; 356:36-43. [PMID: 30030096 DOI: 10.1016/j.taap.2018.07.017] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Revised: 06/29/2018] [Accepted: 07/16/2018] [Indexed: 01/17/2023]
Abstract
Cadmium (Cd) has been linked to a variety of cancers, including breast cancer; however, the molecular mechanism of its carcinogenic activity is not fully understood. To this end, the present study investigated the roles of ferroportin (FPN), a prognostic marker of breast cancer, in Cd-induced stimulation of cell proliferation and cell migration. Triple-negative MDA-MB-231 cells were treated with 1-3 μM Cd. The cells exhibited significant reduction in FPN expression and concomitant increase in iron concentration. Cells treated with Cd for 8 weeks displayed elevated proliferative and migratory activities which were inversely related with FPN expression. Reduced FPN expression also resulted in EMT as indicated by an increase in the expression of E-cadherin, and a decrease in the expression of N-cadherin, Twist and Slug. Further investigation revealed that Cd suppressed FPN expression at least partially by activating TGF-β, a known regulator of FPN expression. Taken together, these results indicate that Cd-induced stimulation of MDA-MB-231 cell proliferation, EMT, and migration is brought about by suppression of FPN expression and associated disruption of iron homeostasis.
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Affiliation(s)
- Zhongguo Shan
- Center for Molecular Toxicology, Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island, Kingston, RI 02881, USA
| | - Zhengxi Wei
- Center for Molecular Toxicology, Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island, Kingston, RI 02881, USA
| | - Zahir A Shaikh
- Center for Molecular Toxicology, Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island, Kingston, RI 02881, USA.
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Fu D, Bridle A, Leef M, Gagnon MM, Hassell KL, Nowak BF. Using a multi-biomarker approach to assess the effects of pollution on sand flathead (Platycephalus bassensis) from Port Phillip Bay, Victoria, Australia. MARINE POLLUTION BULLETIN 2017; 119:211-219. [PMID: 28392090 DOI: 10.1016/j.marpolbul.2017.03.067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Revised: 03/05/2017] [Accepted: 03/31/2017] [Indexed: 06/07/2023]
Abstract
Hepatic gene expression and liver histology were examined in sand flathead (Platycephalus bassensis) from six locations in Port Phillip Bay, Victoria, Australia. Four sets of genes including thyroid-related genes (D1, D2, TTR, TRα and TRβ), metal metabolism-related genes (MT, MTF1, TF, Ferritin and FPN1), apoptosis-related genes (Diablo/SMAC1, Diablo/SMAC2 and CYP1A) and an endoplasmic reticulum stress biomarker gene (GRP78) were examined in female flathead using qRT-PCR. TRβ and Diablo/SMAC1 gene expression was significantly up-regulated in fish from all polluted sites compared to those from a reference site. The transcripts of TRα and FPN1 were significantly higher in flathead from Corio Bay, while the hepatic mRNA of TTR and GRP78 were significantly lower in those fish. Positive correlations were observed between Diablo/SMAC1 and CYP1A, D2 and TRβ, TRα and TRβ. This study demonstrates that application of pathway-based biomarker genes and histopathology can provide comprehensive information on the impact of environmental pollutants on fish.
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Affiliation(s)
- Dingkun Fu
- Institute for Marine and Antarctic Studies, University of Tasmania, Locked Bag 1370, Launceston, Tasmania 7250, Australia
| | - Andrew Bridle
- Institute for Marine and Antarctic Studies, University of Tasmania, Locked Bag 1370, Launceston, Tasmania 7250, Australia
| | - Melanie Leef
- Institute for Marine and Antarctic Studies, University of Tasmania, Locked Bag 1370, Launceston, Tasmania 7250, Australia
| | - Marthe Monique Gagnon
- Department of Environment & Agriculture, Curtin University, Bentley 6102, Western Australia, Australia
| | - Kathryn L Hassell
- Centre for Aquatic Pollution Identification and Management (CAPIM), The University of Melbourne, Parkville 3010, Victoria, Australia
| | - Barbara F Nowak
- Institute for Marine and Antarctic Studies, University of Tasmania, Locked Bag 1370, Launceston, Tasmania 7250, Australia.
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Genetics of the human placenta: implications for toxicokinetics. Arch Toxicol 2016; 90:2563-2581. [DOI: 10.1007/s00204-016-1816-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 08/04/2016] [Indexed: 10/21/2022]
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Guo W, Zhang J, Li W, Xu M, Liu S. Disruption of iron homeostasis and resultant health effects upon exposure to various environmental pollutants: A critical review. J Environ Sci (China) 2015; 34:155-164. [PMID: 26257358 DOI: 10.1016/j.jes.2015.04.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 04/19/2015] [Accepted: 04/20/2015] [Indexed: 06/04/2023]
Abstract
Environmental pollution has become one of the greatest problems in the world, and the concerns about environmental pollutants released by human activities from agriculture and industrial production have been continuously increasing. Although intense efforts have been made to understand the health effects of environmental pollutants, most studies have only focused on direct toxic effects and failed to simultaneously evaluate the long-term adaptive, compensatory and secondary impacts on health. Burgeoning evidence suggests that environmental pollutants may directly or indirectly give rise to disordered element homeostasis, such as for iron. It is crucially important to maintain concerted cellular and systemic iron metabolism. Otherwise, disordered iron metabolism would lead to cytotoxicity and increased risk for various diseases, including cancers. Thus, study on the effects of environmental pollutants upon iron homeostasis is urgently needed. In this review, we recapitulate the available findings on the direct or indirect impacts of environmental pollutants, including persistent organic pollutants (POPs), heavy metals and pesticides, on iron homeostasis and associated adverse health problems. In view of the unanswered questions, more efforts are warranted to investigate the disruptive effects of environmental pollutants on iron homeostasis and consequent toxicities.
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Affiliation(s)
- Wenli Guo
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Jie Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Wenjun Li
- School of Stomatology, Wuhan University, Wuhan 430072, China
| | - Ming Xu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Sijin Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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Sun L, Wang L, Wang Z, He W, Zhang S, Guo W, Qian Y, Ji H, Rong H, Liu S. Cadmium depletes cellular iron availability through enhancing ferroportin translation via iron responsive element. Mol Med Rep 2014; 11:3129-33. [PMID: 25435269 DOI: 10.3892/mmr.2014.3015] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Accepted: 11/03/2014] [Indexed: 11/06/2022] Open
Abstract
Cadmium (Cd) is a heavy metal that has detrimental effects on various organs. The widespread contamination of Cd in the environment, crops and food sources poses a severe threat to human health. Acute toxicities of Cd have been extensively investigated; however, the health impact of chronic low‑dose exposure to Cd, particularly exposure under non‑toxic concentrations, has yet to be elucidated. Furthermore, the toxic threshold of Cd is currently unknown. Ferroportin is the only known iron exporter in vertebrate cells, and it has an essential role in controlling iron egress from cells. To the best of our knowledge, the present study is the first to verify the regulation of ferroportin by Cd. Treatment with low‑dose Cd (i.e. at sublethal concentrations, without undermining cell viability) increased the protein expression of ferroportin in macrophages, and this was associated with depleted cellular iron levels. Mechanistic investigations revealed that Cd modulated the ferroportin concentration at the translational level, via the iron responsive element located at the 5'‑untranslated region of ferroportin. In conclusion, these data provide evidence for the molecular basis by which Cd alters cellular iron availability through elevating concentrations of ferroportin.
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Affiliation(s)
- Li Sun
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco‑Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, P.R. China
| | - Lixin Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco‑Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, P.R. China
| | - Zhe Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco‑Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, P.R. China
| | - Wei He
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco‑Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, P.R. China
| | - Shuping Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco‑Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, P.R. China
| | - Wenli Guo
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco‑Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, P.R. China
| | - Yi Qian
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco‑Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, P.R. China
| | - Hong Ji
- Shandong Institute of Endocrine and Metabolic Diseases, Shandong Academy of Medical Sciences, Jinan, Shandong 250062, P.R. China
| | - Haiqin Rong
- Shandong Institute of Endocrine and Metabolic Diseases, Shandong Academy of Medical Sciences, Jinan, Shandong 250062, P.R. China
| | - Sijin Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco‑Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, P.R. China
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Rentschler G, Kippler M, Axmon A, Raqib R, Ekström EC, Skerfving S, Vahter M, Broberg K. Polymorphisms in iron homeostasis genes and urinary cadmium concentrations among nonsmoking women in Argentina and Bangladesh. ENVIRONMENTAL HEALTH PERSPECTIVES 2013; 121:467-72. [PMID: 23416510 PMCID: PMC3620753 DOI: 10.1289/ehp.1205672] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Accepted: 02/14/2013] [Indexed: 05/07/2023]
Abstract
BACKGROUND Cadmium (Cd) is a human toxicant and carcinogen. Genetic variation might affect long-term accumulation. Cd is absorbed via iron transporters. OBJECTIVES We evaluated the impact of iron homeostasis genes [divalent metal transporter 1 (SLC11A2), transferrin (TF), transferrin receptors (TFR2 and TFRC), and ferroportin (SLC40A1)] on Cd accumulation. METHODS Subjects were nonsmoking women living in the Argentinean Andes [n = 172; median urinary Cd (U-Cd) = 0.24 µg/L] and Bangladesh (n = 359; U-Cd = 0.54 µg/L) with Cd exposure mainly from food. Concentrations of U-Cd and Cd in whole blood or in erythrocytes (Ery-Cd) were measured by inductively coupled plasma mass spectrometry. Fifty polymorphisms were genotyped by Sequenom. Gene expression was measured in whole blood (n = 72) with Illumina DirectHyb HumanHT-12 v4.0. RESULTS TFRC rs3804141 was consistently associated with U-Cd. In the Andean women, mean U-Cd concentrations were 22% (95% CI: -2, 51%), and they were 56% (95% CI: 10, 120%) higher in women with GA and AA genotypes, respectively, relative to women with the GG genotype. In the Bangladeshi women, mean U-Cd concentrations were 22% (95% CI: 1, 48%), and they were 58% (95% CI: -3, 157%) higher in women with GA and AA versus GG genotype, respectively [adjusted for age and plasma ferritin in both groups; ptrend = 0.006 (Andes) and 0.009 (Bangladesh)]. TFRC expression in blood was negatively correlated with plasma ferritin (rS = -0.33, p = 0.006), and positively correlated with Ery-Cd (significant at ferritin concentrations of < 30 µg/L only, rS = 0.40, p = 0.046). Rs3804141 did not modify these associations or predict TFRC expression. Cd was not consistently associated with any of the other polymorphisms evaluated. CONCLUSIONS One TFRC polymorphism was associated with urine Cd concentration, a marker of Cd accumulation in the kidney, in two very different populations. The consistency of the findings supports the possibility of a causal association.
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Affiliation(s)
- Gerda Rentschler
- Department of Laboratory Medicine, Division of Occupational and Environmental Medicine, Lund University, Lund, Sweden
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Horiguchi H, Oguma E, Kayama F. Cadmium induces anemia through interdependent progress of hemolysis, body iron accumulation, and insufficient erythropoietin production in rats. Toxicol Sci 2011; 122:198-210. [PMID: 21540277 DOI: 10.1093/toxsci/kfr100] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Cadmium is a toxic heavy metal and distributed widely in the environment. In addition to damaging the liver, kidneys, and bone, cadmium causes anemia through hemolysis, iron deficiency, and insufficient erythropoietin (EPO) production (renal anemia) along with changes in iron metabolism. Here, we investigated the role of iron in the interdependent progress of three types of anemia in cadmium-injected rats fed iron-sufficient or iron-deficient diets for 1 or 3 months. Cadmium injections for 1 month induced renal anemia without renal injury. Injections for 3 months induced hemolysis, iron deficiency, and renal anemia, accompanied by hepatic and renal damage. Iron concentrations in the liver, kidney, and spleen were increased, derived from internally released iron from hemolyzed red blood cells, increased duodenal iron absorption, insufficient erythropoiesis, and hepatic ferritin overproduced by cadmium-induced interleukin-6. Therefore, the iron deficiency anemia was actually apparent. Cadmium suppressed renal EPO production through a direct effect, accumulated iron, and destruction of EPO-producing cells. Increased duodenal iron absorption could be attributed to hypertrophy of the duodenal mucosa derived from anemia. Thus, insufficient EPO production and iron accumulation are the central factors driving anemia in cadmium toxicity.
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Affiliation(s)
- Hyogo Horiguchi
- Division of Environmental Toxicology, Department of Pharmacology, School of Medicine, Jichi Medical University, Yakushiji, Shimotsuke, Tochigi, Japan.
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Troadec MB, Ward DM, Lo E, Kaplan J, De Domenico I. Induction of FPN1 transcription by MTF-1 reveals a role for ferroportin in transition metal efflux. Blood 2010; 116:4657-64. [PMID: 20688958 PMCID: PMC2996121 DOI: 10.1182/blood-2010-04-278614] [Citation(s) in RCA: 104] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2010] [Accepted: 07/24/2010] [Indexed: 12/15/2022] Open
Abstract
Ferroportin (Fpn) is the only known iron exporter in vertebrate cells and plays a critical role in iron homeostasis regulating cytosolic iron levels and exporting iron to plasma. Ferroportin1 (FPN1) expression can be transcriptionally regulated by iron as well as other transition metals. Fpn can also be posttranslationally regulated by hepcidin-mediated internalization and degradation. We demonstrate that zinc and cadmium induce FPN1 transcription through the action of Metal Transcription Factor-1 (MTF-1). These transition metals induce MTF-1 translocation into the nucleus. Zinc leads to MTF-1 binding to the FPN1 promoter, while iron does not. Silencing of MTF-1 reduces FPN1 transcription in response to zinc but not in response to iron. The mouse FPN1 promoter contains 2 MTF-1 binding sites and mutation of those sites affects the zinc and cadmium-dependent expression of a FPN1 promoter reporter construct. We demonstrate that Fpn can transport zinc and can protect zinc sensitive cells from high zinc toxicity.
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