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Lei L, Zhang F, Huang J, Yang X, Zhou X, Yan H, Chen C, Zheng S, Si L, Jose PA, Zeng C, Yang J. Selenium deficiency causes hypertension by increasing renal AT 1 receptor expression via GPx1/H 2O 2/NF-κB pathway. Free Radic Biol Med 2023; 200:59-72. [PMID: 36868433 PMCID: PMC10164092 DOI: 10.1016/j.freeradbiomed.2023.02.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 02/17/2023] [Accepted: 02/22/2023] [Indexed: 03/05/2023]
Abstract
Epidemiological studies show an association between low body selenium and the risk of hypertension. However, whether selenium deficiency causes hypertension remains unknown. Here, we report that Sprague-Dawley rats fed a selenium-deficient diet for 16 weeks developed hypertension, accompanied with decreased sodium excretion. The hypertension of selenium-deficient rats was associated with increased renal angiotensin II type 1 receptor (AT1R) expression and function that was reflected by the increase in sodium excretion after the intrarenal infusion of the AT1R antagonist candesartan. Selenium-deficient rats had increased systemic and renal oxidative stress; treatment with the antioxidant tempol for 4 weeks decreased the elevated blood pressure, increased sodium excretion, and normalized renal AT1R expression. Among the altered selenoproteins in selenium-deficient rats, the decrease in renal glutathione peroxidase 1 (GPx1) expression was most prominent. GPx1, via regulation of NF-κB p65 expression and activity, was involved in the regulation of renal AT1R expression because treatment with dithiocarbamate (PDTC), an NF-κB inhibitor, reversed the up-regulation of AT1R expression in selenium-deficient renal proximal tubule (RPT) cells. The up-regulation of AT1R expression with GPx1 silencing was restored by PDTC. Moreover, treatment with ebselen, a GPX1 mimic, reduced the increased renal AT1R expression, Na+-K+-ATPase activity, hydrogen peroxide (H2O2) generation, and the nuclear translocation of NF-κB p65 protein in selenium-deficient RPT cells. Our results demonstrated that long-term selenium deficiency causes hypertension, which is due, at least in part, to decreased urine sodium excretion. Selenium deficiency increases H2O2 production by reducing GPx1 expression, which enhances NF-κB activity, increases renal AT1R expression, causes sodium retention and consequently increases blood pressure.
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Affiliation(s)
- Lifu Lei
- Research Center for Metabolic and Cardiovascular Diseases, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China; Department of Clinical Nutrition, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Fuwei Zhang
- Research Center for Metabolic and Cardiovascular Diseases, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China; Department of Cardiology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Juan Huang
- Research Center for Metabolic and Cardiovascular Diseases, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China; Department of Clinical Nutrition, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xinyue Yang
- Department of Cardiology, Daping Hospital, The Third Military Medical University, Chongqing, China; Chongqing Key Laboratory for Hypertension Research, Chongqing Cardiovascular Clinical Research Center, Chongqing Institute of Cardiology, Chongqing, PR China
| | - Xiaoxin Zhou
- Research Center for Metabolic and Cardiovascular Diseases, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China; Department of Clinical Nutrition, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Hongjia Yan
- Research Center for Metabolic and Cardiovascular Diseases, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China; Department of Clinical Nutrition, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Caiyu Chen
- Department of Cardiology, Daping Hospital, The Third Military Medical University, Chongqing, China; Chongqing Key Laboratory for Hypertension Research, Chongqing Cardiovascular Clinical Research Center, Chongqing Institute of Cardiology, Chongqing, PR China
| | - Shuo Zheng
- Department of Cardiology, Daping Hospital, The Third Military Medical University, Chongqing, China; Chongqing Key Laboratory for Hypertension Research, Chongqing Cardiovascular Clinical Research Center, Chongqing Institute of Cardiology, Chongqing, PR China
| | - Liangyi Si
- Department of Cardiology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Pedro A Jose
- Division of Renal Diseases & Hypertension, Department of Medicine and Department of Physiology and Pharmacology, The George Washington University School of Medicine & Health Sciences, Washington, DC, USA
| | - Chunyu Zeng
- Department of Cardiology, Daping Hospital, The Third Military Medical University, Chongqing, China; Chongqing Key Laboratory for Hypertension Research, Chongqing Cardiovascular Clinical Research Center, Chongqing Institute of Cardiology, Chongqing, PR China.
| | - Jian Yang
- Research Center for Metabolic and Cardiovascular Diseases, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China; Department of Clinical Nutrition, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China.
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Adeniran SO, Zheng P, Feng R, Adegoke EO, Huang F, Ma M, Wang Z, Ifarajimi OO, Li X, Zhang G. The Antioxidant Role of Selenium via GPx1 and GPx4 in LPS-Induced Oxidative Stress in Bovine Endometrial Cells. Biol Trace Elem Res 2022; 200:1140-1155. [PMID: 33895964 DOI: 10.1007/s12011-021-02731-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2021] [Accepted: 04/18/2021] [Indexed: 01/15/2023]
Abstract
This study investigated the antioxidant role of selenium (Se) in the form of selenomethionine (SLM) in LPS-induced oxidative stress via the glutathione peroxidase (GPx) enzymes and the Nrf2/HO-1 transcription factor. The impact of serum supplementation in culture media on GPxs was also studied. The bovine uterus is constantly exposed to exogenous pathogens postpartum, and the endometrium is the first contact against bacteria invasion. Endometritis is an inflammation of the endometrium and is brought about by bacterial lipopolysaccharide capable of inducing oxidative stress. The BEND cells were supplemented at the point of seeding with the following SLM concentrations 0, 100, 500, and 1000 nM for 48 h. BEND cells, cultured with or without SLM (100 nM), were initially incubated for 48 h, and then, we serum starved the SLM group for 24, 48, and 72 h. Similarly, an assay involving serum volume (0, 2, 5, and 10%) supplementation in culture media (v/v) with or without SLM (100 nM) was performed for 48 h. The BEND cells were also seeded into four experimental groups and cultured for an initial 48 h as follows: control, LPS (20 μg/mL), SLM (100 nM), and SLM + LPS groups followed by 6-h LPS treatment. The role of SLM in modulating the expressions of GPx1 and GPx4 and the Nrf2 transcription factor-related genes was assessed using qRT-PCR and Western blot techniques. The results showed serum starvation in the presence of SLM supplementation decreased the expression of GPx1 enzyme but increased GPx4 compared to the control. The addition of SLM to cell culture media in an FBS limiting condition improved the expressions of both GPx1 and GPx4. SLM supplementation promoted GPx enzymes' expressions in a serum-free media (0%) and at 2% FBS in media. However, it did not improve their expressions at 10% FBS in media than the untreated groups. Together, our data show the protective role of Se by regulating the expressions of GPx1 and GPx4 enzymes in BEND cells. It also shows that SLM promoted the expression of Nrf2 transcription factor-related genes at both the mRNA and protein levels in BEND cells during LPS stimulation.
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Affiliation(s)
- Samson O Adeniran
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, People's Republic of China
| | - Peng Zheng
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, People's Republic of China
| | - Rui Feng
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, People's Republic of China
| | - Elikanah O Adegoke
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, People's Republic of China
- Department of Animal Science and Technology and BET Research Institute, Chung-Ang University, Anseong, South Korea
| | - Fushuo Huang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, People's Republic of China
| | - Mingjun Ma
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, People's Republic of China
| | - Ziming Wang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, People's Republic of China
| | - Olamigoke O Ifarajimi
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, People's Republic of China
| | - Xiaoyu Li
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, People's Republic of China
| | - Guixue Zhang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, People's Republic of China.
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Neonatal Selenoenzyme Expression Is Variably Susceptible to Duration of Maternal Selenium Deficiency. Antioxidants (Basel) 2021; 10:antiox10020288. [PMID: 33672905 PMCID: PMC7917816 DOI: 10.3390/antiox10020288] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 02/03/2021] [Accepted: 02/08/2021] [Indexed: 12/16/2022] Open
Abstract
Maternal selenium (Se) deficiency is associated with decreased neonatal Se levels, which increases the risk for neonatal morbidities. There is a hierarchy to selenoprotein expression after Se deficiency in adult rodents, depending on the particular protein and organ evaluated. However, it is unknown how limited Se supply during pregnancy impacts neonatal selenoprotein expression. We used an Se-deficient diet to induce perinatal Se deficiency (SeD), initiated 2–4 weeks before onset of breeding and continuing through gestation. Neonatal plasma, liver, heart, kidney, and lung were collected on the day of birth and assessed for selenoproteins, factors required for Se processing, and non-Se containing antioxidant enzymes (AOE). Maternal SeD reduced neonatal circulating and hepatic glutathione peroxidase (GPx) activity, as well as hepatic expression of Gpx1 and selenophosphate synthetase 2 (Sps2). In contrast, the impact of maternal SeD on hepatic thioredoxin reductase 1, hepatic non-Se containing AOEs, as well as cardiac, renal, and pulmonary GPx activity, varied based on duration of maternal exposure to SeD diet. We conclude that the neonatal liver and circulation demonstrate earlier depletion in selenoenzyme activity after maternal SeD. Our data indicate that prolonged maternal SeD may escalate risk to the neonate by progressively diminishing Se-containing AOE across multiple organs.
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Jia L, Wang T, Sun Y, Zhang M, Tian J, Chen H, Shen Z, Khan Abro H, Su N, Cui J. Protective Effect of Selenium-Enriched Red Radish Sprouts on Carbon Tetrachloride-Induced Liver Injury in Mice. J Food Sci 2019; 84:3027-3036. [PMID: 31529805 DOI: 10.1111/1750-3841.14727] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 06/03/2019] [Accepted: 06/10/2019] [Indexed: 02/06/2023]
Abstract
This study aimed to investigate the effect of Se (Selenium) treatment on nutritional quality in radish sprouts. The results showed that 15 µM sodium selenite significantly increased phenolics compounds, flavonoids compounds, anthocyanins, and some essential amino acid content, while improving the total antioxidant capacity of radish sprouts. Besides, the Se-enriched radish sprouts significantly alleviated the liver damage caused by carbon tetrachloride (CCl4 ) in mice and improved the antioxidant capacity of the liver in mice, whereas the Se-enriched radish sprouts alleviated the inflammatory reaction and apoptosis caused by CCl4 . These results imply that Se-enriched radish sprouts have a positive impact on mice with CCl4 -induced liver injury, and that in future Se-enriched radish sprouts could be developed into an effective food and health care product for the liver injury prevention. PRACTICAL APPLICATION: Because selenium is an essential trace element in the human body, selenium-enriched sprouts can help eliminate free radicals in the body, relieve aging, and selenium-deficient diseases. They are easy to grow and have low costs. Hence, selenium-enriched sprouts have a great potential of being widely consumed.
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Affiliation(s)
- Li Jia
- College of Life Sciences, Nanjing Agricultural Univ., Nanjing, Jiangsu, 210095, China
| | - Tao Wang
- College of Life Sciences, Nanjing Agricultural Univ., Nanjing, Jiangsu, 210095, China
| | - Yuanyuan Sun
- College of Life Sciences, Nanjing Agricultural Univ., Nanjing, Jiangsu, 210095, China
| | - Miaoran Zhang
- College of Life Sciences, Nanjing Agricultural Univ., Nanjing, Jiangsu, 210095, China
| | - Jiyuan Tian
- College of Life Sciences, Nanjing Agricultural Univ., Nanjing, Jiangsu, 210095, China
| | - Hui Chen
- College of Life Sciences, Nanjing Agricultural Univ., Nanjing, Jiangsu, 210095, China
| | - Zhenguo Shen
- College of Life Sciences, Nanjing Agricultural Univ., Nanjing, Jiangsu, 210095, China
| | - Hashmat Khan Abro
- College of Agriculture, Guangxi Univ., Nanning, Guangxi, 530004, China
| | - Nana Su
- College of Life Sciences, Nanjing Agricultural Univ., Nanjing, Jiangsu, 210095, China
| | - Jin Cui
- College of Life Sciences, Nanjing Agricultural Univ., Nanjing, Jiangsu, 210095, China
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Yan Y, Jiang W, Tan Y, Zou S, Zhang H, Mao F, Gong A, Qian H, Xu W. hucMSC Exosome-Derived GPX1 Is Required for the Recovery of Hepatic Oxidant Injury. Mol Ther 2017; 25:465-479. [PMID: 28089078 DOI: 10.1016/j.ymthe.2016.11.019] [Citation(s) in RCA: 214] [Impact Index Per Article: 30.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 11/26/2016] [Accepted: 11/27/2016] [Indexed: 12/13/2022] Open
Abstract
Exosomes are small biological membrane vesicles secreted by various cells, including mesenchymal stem cells (MSCs). We previously reported that MSC-derived exosomes (MSC-Ex) can elicit hepatoprotective effects against toxicant-induced injury. However, the success of MSC-Ex-based therapy for treatment of liver diseases and the underlying mechanisms have not been well characterized. We used human umbilical cord MSC-derived exosome (hucMSC-Ex) administrated by tail vein or oral gavage at different doses and, in engrafted liver mouse models, noted antioxidant and anti-apoptotic effects and rescue from liver failure. A single systemic administration of hucMSC-Ex (16 mg/kg) effectively rescued the recipient mice from carbon tetrachloride (CCl4)-induced liver failure. Moreover, hucMSC-Ex-derived glutathione peroxidase1 (GPX1), which detoxifies CCl4 and H2O2, reduced oxidative stress and apoptosis. Knockdown of GPX1 in hucMSCs abrogated antioxidant and anti-apoptotic abilities of hucMSC-Ex and diminished the hepatoprotective effects of hucMSC-Ex in vitro and in vivo. Thus, hucMSC-Ex promote the recovery of hepatic oxidant injury through the delivery of GPX1.
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Affiliation(s)
- Yongmin Yan
- Liver Disease and Cancer Institute, School of Medicine, Jiangsu University, 212013 Zhenjiang, Jiangsu, People's Republic of China.
| | - Wenqian Jiang
- Liver Disease and Cancer Institute, School of Medicine, Jiangsu University, 212013 Zhenjiang, Jiangsu, People's Republic of China
| | - Youwen Tan
- The Affiliated Third Hospital of Zhenjiang, Jiangsu University, 212013 Zhenjiang, Jiangsu, People's Republic of China
| | - Shengqiang Zou
- The Affiliated Third Hospital of Zhenjiang, Jiangsu University, 212013 Zhenjiang, Jiangsu, People's Republic of China
| | - Hongguang Zhang
- The Affiliated Third Hospital of Zhenjiang, Jiangsu University, 212013 Zhenjiang, Jiangsu, People's Republic of China
| | - Fei Mao
- Liver Disease and Cancer Institute, School of Medicine, Jiangsu University, 212013 Zhenjiang, Jiangsu, People's Republic of China
| | - Aihua Gong
- Liver Disease and Cancer Institute, School of Medicine, Jiangsu University, 212013 Zhenjiang, Jiangsu, People's Republic of China
| | - Hui Qian
- Liver Disease and Cancer Institute, School of Medicine, Jiangsu University, 212013 Zhenjiang, Jiangsu, People's Republic of China; Key Laboratory of Laboratory Medicine of Jiangsu Province, School of Medicine, Jiangsu University, 212013 Zhenjiang, Jiangsu, People's Republic of China
| | - Wenrong Xu
- Liver Disease and Cancer Institute, School of Medicine, Jiangsu University, 212013 Zhenjiang, Jiangsu, People's Republic of China; Key Laboratory of Laboratory Medicine of Jiangsu Province, School of Medicine, Jiangsu University, 212013 Zhenjiang, Jiangsu, People's Republic of China.
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Chen F, Zhu L, Qiu H, Qin S. Selenium-enrichedSaccharomyces cerevisiaeimproves growth, antioxidant status and selenoprotein gene expression in Arbor Acres broilers. J Anim Physiol Anim Nutr (Berl) 2016; 101:259-266. [DOI: 10.1111/jpn.12571] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 06/17/2016] [Indexed: 11/29/2022]
Affiliation(s)
- F. Chen
- Institute of Animal Nutritional and Metabolic Disorders; College of Animal Science and Veterinary Medicine; Qingdao Agricultural University; Qingdao China
| | - L. Zhu
- Institute of Animal Nutritional and Metabolic Disorders; College of Animal Science and Veterinary Medicine; Qingdao Agricultural University; Qingdao China
| | - H. Qiu
- College of Veterinary Medicine; Nanjing Agricultural University; Nanjing China
| | - S. Qin
- Department of Animal Science; Tianjin Agricultural University; Tianjin China
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Liu C, Fu J, Liu C, Li S. The role of nitric oxide and autophagy in liver injuries induced by selenium deficiency in chickens. RSC Adv 2015. [DOI: 10.1039/c5ra01030f] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Selenium (Se) is recognized as a necessary trace mineral in animal diets, including those of birds.
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Affiliation(s)
- Chunpeng Liu
- College of Veterinary Medicine
- Northeast Agricultural University
- Harbin 150030
- P. R. China
| | - Jing Fu
- College of Animal Science and Technology
- Northeast Agricultural University
- Harbin 150030
- P. R. China
| | - Ci Liu
- College of Veterinary Medicine
- Northeast Agricultural University
- Harbin 150030
- P. R. China
| | - Shu Li
- College of Veterinary Medicine
- Northeast Agricultural University
- Harbin 150030
- P. R. China
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Lai I, Chai Y, Simmons D, Luthe G, Coleman MC, Spitz D, Haschek WM, Ludewig G, Robertson LW. Acute toxicity of 3,3',4,4',5-pentachlorobiphenyl (PCB 126) in male Sprague-Dawley rats: effects on hepatic oxidative stress, glutathione and metals status. ENVIRONMENT INTERNATIONAL 2010; 36:918-23. [PMID: 19969354 PMCID: PMC2891598 DOI: 10.1016/j.envint.2009.11.002] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2009] [Revised: 10/18/2009] [Accepted: 11/12/2009] [Indexed: 05/02/2023]
Abstract
Although polychlorinated biphenyl (PCBs) production, and new uses for PCBs, was halted in the 1970s in the United States, PCBs continue to be used in closed systems and persist in the environment, accumulating in fatty tissues. PCBs are efficacious inducers of drug metabolism and may increase oxidative events and alter many other biochemical and morphologic parameters within cells and tissues. The goal of the present study was to evaluate the effects of a single, very low dose of PCB 126 (3,3',4,4',5-pentachlorobiphenyl), a coplanar, dioxin-like PCB congener and aryl hydrocarbon receptor (AhR) agonist, on redox status, metals homeostasis, antioxidant enzymes, and cellular morphology. To examine these parameters, male Sprague-Dawley rats were fed a purified AIN-93 basal diet containing 0.2 ppm selenium for two weeks, then administered a single i.p. injection of corn oil (5 ml/kg body weight) or 1µmol PCB 126/kg body weight (326µg/kg body weight) in corn oil. Rats were maintained on the diet for an additional two weeks before being euthanized. This dose of PCB 126 did not alter feed intake or growth, but significantly increased liver weight (42%) and hepatic microsomal cytochrome P-450 (CYP1A) enzyme activities (10-40-fold increase). Hepatic zinc, selenium, and glutathione levels were significantly decreased 15%, 30%, and 20%, respectively, by PCB 126. These changes were accompanied by a 60% decrease in selenium-dependent glutathione peroxidase activity. In contrast, hepatic copper levels were increased 40% by PCB 126. PCB 126-induced pathology was characterized by hepatocellular hypertrophy and mild steatosis in the liver and a mild decrease in cortical T-cells in the thymus. This controlled study in rats fed a purified diet shows that even a single, very low dose of PCB 126 that did not alter feed intake or growth, significantly perturbed redox and metals homeostasis and antioxidant and enzyme levels in rodent liver.
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Affiliation(s)
- Ian Lai
- Interdisciplinary Graduate Program in Human Toxicology, University of Iowa
- Department of Occupational & Environmental Health, University of Iowa
| | - Yingtao Chai
- University Hygienic Laboratory, University of Iowa
| | - Don Simmons
- University Hygienic Laboratory, University of Iowa
| | - Gregor Luthe
- Interdisciplinary Graduate Program in Human Toxicology, University of Iowa
- Department of Occupational & Environmental Health, University of Iowa
| | - Mitchell C. Coleman
- Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa
| | - Douglas Spitz
- Interdisciplinary Graduate Program in Human Toxicology, University of Iowa
- Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa
| | - Wanda M. Haschek
- Department of Pathobiology, University of Illinois, Urbana, IL 61802
| | - Gabriele Ludewig
- Interdisciplinary Graduate Program in Human Toxicology, University of Iowa
- Department of Occupational & Environmental Health, University of Iowa
| | - Larry W. Robertson
- Interdisciplinary Graduate Program in Human Toxicology, University of Iowa
- Department of Occupational & Environmental Health, University of Iowa
- Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa
- Address Correspondence to Larry W. Robertson: Larry W. Robertson, Ph.D., M.P.H., Professor, Department of Occupational and Environmental Health, The University of Iowa, College of Public Health, 100 Oakdale Campus #219 IREH, Iowa City, Iowa 52242-5000, Phone: 319-335-4554, Fax: 319-335-4290,
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Qin S, Huang K, Gao J, Huang D, Cai T, Pan C. Comparison of glutathione peroxidase 1 and iodothyronine deiodinase 1 mRNA expression in murine liver after feeding selenite or selenized yeast. J Trace Elem Med Biol 2009; 23:29-35. [PMID: 19203714 DOI: 10.1016/j.jtemb.2008.11.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2007] [Revised: 09/04/2008] [Accepted: 11/02/2008] [Indexed: 10/21/2022]
Abstract
The experiment was conducted to compare the effect of different selenium sources on the expression of glutathione peroxidase 1 (GPx1) and iodothyronine deiodinase 1 (Dio1) mRNA in mice by quantitative real-time PCR. A total of 60 male Kunming mice at average body weight of 20 g were allotted to three groups in a randomized complete block design, namely two treatments and one control. Mice in Group 1 were fed a basal diet as control, while mice in Groups 2 and 3 were fed the basal diet supplemented with 0.1mg/kg selenium as sodium selenite or selenized yeast, respectively. Whole feeding experiment lasted for 30 d. At the end of the feeding trial, liver mRNA levels of GPx1 and Dio1 were determined by quantitative real-time PCR, as well as growth performance, body composition, blood and GPx activity were determined. The results showed that no significant differences in overall growth performance and body composition, including body weight, body length, heart weight, kidney weight and liver weight, were found between the experimental groups (P>0.05). Blood GPx activity increased in all of the selenium supplemented groups compared with control group (P<0.01). However, blood GPx activity in selenized yeast group was higher than that in sodium selenite group (P<0.05). Liver mRNA levels of GPx1 and Dio1 also increased in the two selenium supplemented groups compared with the control group (P<0.05), while there was no significant difference between the sodium selenite and selenized yeast groups (P>0.05). In conclusion, selenium increased the mRNA expression of GPx1 and Dio1 genes in murine liver, and there was no significant difference between the organic or inorganic form of selenium used.
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Affiliation(s)
- Shunyi Qin
- Institute of Nutritional and Metabolic Disorders in Domestic Animals and Fowls, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
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Kaushal N, Bansal MP. Dietary selenium variation-induced oxidative stress modulates CDC2/cyclin B1 expression and apoptosis of germ cells in mice testis. J Nutr Biochem 2007; 18:553-64. [PMID: 17320365 DOI: 10.1016/j.jnutbio.2006.11.003] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2006] [Revised: 11/08/2006] [Accepted: 11/16/2006] [Indexed: 01/12/2023]
Abstract
Oxidative stress has been linked with apoptosis in germ cells and with male infertility. However, the molecular mechanism of oxidative-stress-mediated apoptosis in germ cells has not been clearly defined so far. Because of the involvement of CDC2 and cyclin B1 in cell cycle regulation and their plausible role in apoptosis, the present study aimed to investigate the possibility that selenium (Se)-induced oxidative-stress-mediated modulations of these cell cycle regulators cause DNA damage and apoptosis in germ cells. To create different Se status (deficient, adequate and excess), male Balb/c mice were fed yeast-based Se-deficient diet (Group I) and a deficient diet supplemented with Se as sodium selenite (0.2 and 1 ppm Se in Groups II and III, respectively) for a period of 8 weeks. After the completion of the diet feeding schedule, a significant decrease in Se levels and glutathione peroxidase activity was observed in the Se-deficient group (Group I), whereas the Se-excess group (Group III) demonstrated an increase in Se levels. Increased levels of lipid peroxidation were seen in both Groups I and III when compared to Group II, indicating oxidative stress. The mRNA and protein expressions of both CDC2 and cyclin B1 were found to be significantly decreased in Groups I and III. A decrease in the immunohistochemical localization of these proteins was also observed in spermatogenic cells. The mRNA expressions of apoptotic factors such as Bcl-2, Bax, caspase-3 and caspase-9 were found to be increased in Groups I and III. A decrease in CDC2 kinase activity was also seen in these groups. Increased apoptosis was observed in Group I and Group III animals by terminal deoxynucleotidyl transferase-mediated dUTP biotin nick end labeling assay indicating oxidative-stress-mediated DNA damage. These findings suggest the effect of Se-induced oxidative stress on the cell cycle regulators and apoptotic activity of germ cells, thus providing new dimensions to molecular mechanisms underlying male infertility.
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Affiliation(s)
- Naveen Kaushal
- Department of Biophysics, Panjab University, Chandigarh 160014, India
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Kaushal N, Bansal MP. Inhibition of CDC2/Cyclin B1 in response to selenium-induced oxidative stress during spermatogenesis: potential role of Cdc25c and p21. Mol Cell Biochem 2006; 298:139-50. [PMID: 17160696 DOI: 10.1007/s11010-006-9360-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2006] [Accepted: 10/25/2006] [Indexed: 01/11/2023]
Abstract
Various cell cycle regulators control and coordinate the process of cell cycle. Because of the crucial involvement of CDC2, Cyclin B1, Cdc25c, and p21 in cell cycle regulation, the present study was aimed to investigate the possibility that selenium (Se)-induced oxidative stress mediated alterations in Cdc25c and p21 may cause modulations in the CDC2/Cyclin B1 complex responsible for G2/M phase checkpoint during meiosis I of spermatogenesis. To create different Se status-deficient, adequate and excess Se, male Balb/c mice were fed yeast based Se deficient diet (group I) and deficient diet supplemented with Se as sodium selenite at 0.2 and 1 ppm Se (group II and III) for a period of 8 weeks. After completion of the diet feeding schedule, a significant decrease in the Se and glutathione peroxidase levels were observed in the Se deficient group (I), whereas Se excess group (III) demonstrated an increase in Se levels. Increased levels of lipid peroxidation (LPO) were seen in both group I and group III when compared to group II, thus indicating oxidative stressed conditions. The mRNA and protein expression of CDC2, Cyclin B1, and Cdc25c were found to be significantly decreased in groups I and III. However, the expression of p21, a kinase inhibitor, was found to be elevated in Se deficient and Se excess fed groups. A statistically significant decrease in the CDC2 kinase activity was also seen in the Se deficient and excess groups. These findings suggest that under the influence of Se-induced oxidative stress, the down regulation of CDC2/Cyclin B1 complex is mediated through changes in Cdc25c and p21 leading to the cell cycle arrest and thus providing new dimensions to the molecular mechanisms underlying male infertility.
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Affiliation(s)
- Naveen Kaushal
- Department of Biophysics, Panjab University, Chandigarh, 160014, India
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Kaur P, Bansal MP. Effect of selenium-induced oxidative stress on the cell kinetics in testis and reproductive ability of male mice. Nutrition 2005; 21:351-7. [PMID: 15797678 DOI: 10.1016/j.nut.2004.05.028] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2003] [Accepted: 05/30/2004] [Indexed: 11/19/2022]
Abstract
OBJECTIVE The present study evaluated the role of experimental oxidative stress (induced by feeding diets with different concentrations of selenium [Se], a trace nutrient and potent antioxidant) on male reproductive activity in mice. METHODS To create different levels of oxidative stress in male mice, three diets with different levels of Se were fed to different groups for 8 wk. Mice in group 1 were fed a yeast-based diet, which is considered a Se-deficient diet (0.02 ppm). Mice in groups 2 and 3 were fed with an Se-deficient diet supplemented with 0.2 and 1 ppm Se as sodium selenite, respectively. RESULTS After completion of the feeding schedule, a significant decrease in Se levels were observed in Se-deficient mice (group 1), whereas Se levels greatly increased in the Se-excess mice (group 3). Glutathione peroxidase activity was greatly decreased in the liver and testis in group 1, whereas glutathione-S-transferase activity was significantly increased in the testis. No significant change was found in activities of glutathione peroxidase and glutathione-S-transferase in group 3 compared with group 2. Cell kinetics showed a significant decrease in the number of pachytene spermatocytes and young and mature spermatids in group 1 compared with group 2. No appreciable change was observed in the germinal cell population in group 3. A significant decrease in sperm number was observed in group 1 compared with group 2. No change in these parameters was observed in group 3. The fertility status of mice in terms of percent fertility and litter size also exhibited a significant decrease in the reproductive ability of group 1. No change in these parameters was observed in group 3 compared with group 2. CONCLUSION The present results clearly demonstrate the effect of oxidative stress generated by feeding different concentrations of Se on cell kinetics in the testis and, hence, its effect on the reproductive ability of male mice.
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Affiliation(s)
- Parminder Kaur
- Department of Biophysics, Panjab University, Chandigarh, India
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Moskovitz J, Stadtman ER. Selenium-deficient diet enhances protein oxidation and affects methionine sulfoxide reductase (MsrB) protein level in certain mouse tissues. Proc Natl Acad Sci U S A 2003; 100:7486-90. [PMID: 12792026 PMCID: PMC164613 DOI: 10.1073/pnas.1332607100] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Mammals contain two methionine sulfoxide (MetO) reductases, MsrA and MsrB, that catalyze the thioredoxin-dependent reduction of the S-MetO and R-MetO derivatives, respectively, to methionine. The major mammalian MsrB is a selenoprotein (except in the heart). Here, we show that there is a loss of MsrB activity in the MsrA-/- mouse that correlates with parallel losses in the levels of MsrB mRNA and MsrB protein, suggesting that MsrA might have a role in MsrB transcription. Moreover, mice that were grown on a selenium-deficient (SD) diet showed a substantial decrease in the levels of MsrB-catalytic activity, MsrB protein, and MsrB mRNA in liver and kidney tissues of both WT and MsrA-/- mouse strains. Whereas no significant protein-MetO could be detected in tissue proteins of young mature mice grown on a selenium-adequate diet, growth on the SD diet led to substantial accumulations of MetO in proteins and also of protein carbonyl derivatives in the liver, kidney, cerebrum, and cerebellum, respectively. In addition, accumulation of protein-MetO derivatives increased with age in tissues of mice fed with a selenium-adequate diet. It should be pointed out that even though the total Msr level is at least 2-fold higher in WT than in MsrA-/- mice, SD diet causes an equal elevation of protein-MetO (except in brain cerebellum) and carbonyl levels in both strains, suggesting involvement of other selenoproteins in regulation of the level of cellular protein-MetO accumulation. Furthermore, the development of the "tip-toe" walking behavior previously observed in the MsrA-/- mice occurred earlier when they were fed with the SD diet.
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Affiliation(s)
- Jackob Moskovitz
- Laboratory of Biochemistry, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA.
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Müller AS, Pallauf J. Effect of increasing selenite concentrations, vitamin E supplementation and different fetal calf serum content on GPx1 activity in primary cultured rabbit hepatocytes. J Trace Elem Med Biol 2003; 17:183-92. [PMID: 14968931 DOI: 10.1016/s0946-672x(03)80024-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Primary rabbit hepatocytes from 6 week old female New Zealand White rabbits (3.0 x 10(6) viable hepatocytes per treatment) were incubated for 24 h or 48 h with two basic variants of the selenium and vitamin E free DMEM/F12-HAM nutrition medium containing 2.5% or 10% fetal calf serum (FCS). Selenium and vitamin E concentrations of the media were varied by the addition of 0, 10, 50 and 100 ng Se/mL medium as sodium selenite and 100 microg alpha-tocopheryl acetate/mL. Lactic dehydrogenase (LDH) leakage of the hepatocytes was not influenced by the various selenium concentrations of the media, whereas vitamin E addition significantly inhibited LDH release. The activity of cellular glutathione peroxidase (GPx1) was markedly induced by increasing the selenium supplementation of the culture media. Vitamin E supply further enhanced GPx1 induction. In hepatocytes cultivated at the lower serum concentration (2.5% FCS), increasing the selenite concentration of the media raised GPx1 and reduced the intracellular levels of the reduced tripeptide glutathione (GSH). No vectored relation between the selenium concentration of the media and the activity of superoxide dismutase (SOD) could be observed. After both incubation periods (24 h and 48 h) SOD activity was significantly higher in the cytosol of hepatocytes grown in media containing 10% FCS as compared to cells incubated at the 2.5% FCS level. Furthermore, SOD activity was reduced by the addition of vitamin E to the media. In conclusion the results indicate an effective metabolism of rabbit hepatocytes for selenite even in amounts as low as nanograms. A general cytoprotective role for vitamin E can be shown by its ability to decrease LDH leakage and by the reduction of SOD activity.
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Affiliation(s)
- Andreas S Müller
- Institute of Animal Nutrition and Nutrition Physiology, Justus Liebig University Giessen, Giessen, Germany
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