1
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Sun W, Xu T, Lin H, Yin Y, Xu S. BPA and low-Se exacerbate apoptosis and autophagy in the chicken bursa of Fabricius by regulating the ROS/AKT/FOXO1 pathway. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 908:168424. [PMID: 37944606 DOI: 10.1016/j.scitotenv.2023.168424] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 09/28/2023] [Accepted: 11/06/2023] [Indexed: 11/12/2023]
Abstract
Bisphenol A (BPA) is a ubiquitous environmental pollutant that can have harmful effects on human and animal immune systems by inducing oxidative stress. Selenium (Se) deficiency damages immune organ tissues and exhibits synergistic effects on the toxicity of environmental pollutants. However, oxidative stress, cell apoptosis, and autophagy caused by the combination of BPA and low-Se, have not been studied in the bursa of Fabricius of the immune organ of poultry. Therefore, in this study, BPA and/or low-Se broiler models and chicken lymphoma cells (MDCC-MSB-1 cells) models were established to investigate the effects of BPA and/or low-Se on the bursa of Fabricius of poultry. The data showed that BPA and/or low-Se disrupted the normal structure of the bursa of Fabricius, BPA (60 μM) significantly reduced the activity of MDCC-MSB-1 cells and disrupted normal morphology (IC50 = 192.5 ± 1.026 μM). Compared with the Control group, apoptosis and autophagy were increased in the BPA or low-Se groups, and the generation of reactive oxygen species (ROS) was increased. This inhibited the AKT/FOXO1 pathway, leading to mitochondrial fusion/division imbalance (Mfn1, Mfn2, OPA1 were increased, DRP1 was decreased) and dysfunction (CI-NDUFB8, CII-SDHB, CIII-UQCRC2, CIV-MTCO1, CV-ATP5A1, ATP). Furthermore, combined exposure of BPA and low-Se aggravated the above-mentioned changes. Treatment with N-acetylcysteine (NAC) reduced ROS levels and activated the AKT/FOXO1 pathway to further alleviate BPA and low-Se-induced apoptosis and autophagy. Apoptosis induced by low-Se + BPA was exacerbated after 3-Methyladenine (3-MA, autophagy inhibitor) treatment. Together, these results indicated that BPA and low-Se aggravated apoptosis and autophagy of the bursa of Fabricius in chickens by regulating the ROS/AKT/FOXO1 pathway.
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Affiliation(s)
- Wenying Sun
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China
| | - Tong Xu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China
| | - Hongjin Lin
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China
| | - Yilin Yin
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China
| | - Shiwen Xu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China; Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China.
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2
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Ryabova YV, Sutunkova MP, Minigalieva IA, Shabardina LV, Filippini T, Tsatsakis A. Toxicological effects of selenium nanoparticles in laboratory animals: A review. J Appl Toxicol 2024; 44:4-16. [PMID: 37312419 DOI: 10.1002/jat.4499] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/15/2023] [Accepted: 05/18/2023] [Indexed: 06/15/2023]
Abstract
This paper provides a comprehensive summary of the main toxicological studies conducted on selenium nanoparticles (NPs) using laboratory animals, up until February 28, 2023. A literature search revealed 17 articles describing experimental studies conducted on warm-blooded animals. Despite some uncertainties, in vivo studies have demonstrated that selenium NPs have an adverse effect on laboratory animals, as evidenced by several indicators of general toxic action. These effects include reductions of body mass, changes in hepatotoxicity indices (increased enzyme activity and accumulation of selenium in the liver), and the possibility of impairment of fatty acid, protein, lipid, and carbohydrate metabolisms. However, no specific toxic action attributable solely to selenium has been identified. The LOAEL and NOAEL values are contradictory. The NOAEL was 0.22 mg/kg body weight per day for males and 0.33 mg/kg body weight per day for females, while the LOAEL was assumed to be a dose of 0.05 mg/kg of nanoselenium. This LOAEL value is much higher for rats than for humans. The relationship between the adverse effects of selenium NPs and exposure dose is controversial and presents a wide typological diversity. Further research is needed to clarify the absorption, metabolism, and long-term toxicity of selenium NPs, which is critical to improving the risk assessment of these compounds.
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Affiliation(s)
- Yuliya V Ryabova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russian Federation
- Laboratory of Stochastic Transport of Nanoparticles in Living Systems, Laboratory of Multi-Scale Mathematical Modeling, Ural Federal University, Yekaterinburg, Russian Federation
| | - Marina P Sutunkova
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russian Federation
| | - Ilzira A Minigalieva
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russian Federation
- Laboratory of Stochastic Transport of Nanoparticles in Living Systems, Laboratory of Multi-Scale Mathematical Modeling, Ural Federal University, Yekaterinburg, Russian Federation
| | - Lada V Shabardina
- Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russian Federation
| | - Tommaso Filippini
- CREAGEN Research Center for Environmental, Genetic and Nutritional Epidemiology, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
- School of Public Health, University of California Berkeley, Berkeley, California, USA
| | - Aristides Tsatsakis
- Department of Forensic Sciences and Toxicology, Faculty of Medicine, University of Crete, Heraklion, Greece
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3
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Zhao X, Thijssen S, Chen H, Garssen J, Knippels LMJ, Hogenkamp A. Selenium Modulates the Allergic Response to Whey Protein in a Mouse Model for Cow's Milk Allergy. Nutrients 2021; 13:2479. [PMID: 34444651 PMCID: PMC8400770 DOI: 10.3390/nu13082479] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 07/08/2021] [Accepted: 07/14/2021] [Indexed: 12/27/2022] Open
Abstract
Cow's milk allergy is a common food allergy in infants, and is associated with an increased risk of developing other allergic diseases. Dietary selenium (Se), one of the essential micronutrients for humans and animals, is an important bioelement which can influence both innate and adaptive immune responses. However, the effects of Se on food allergy are still largely unknown. In the current study it was investigated whether dietary Se supplementation can inhibit whey-induced food allergy in an animal research model. Three-week-old female C3H/HeOuJ mice were intragastrically sensitized with whey protein and cholera toxin and randomly assigned to receive a control, low, medium or high Se diet. Acute allergic symptoms, allergen specific immunoglobulin (Ig) E levels and mast cell degranulation were determined upon whey challenge. Body temperature was significantly higher in mice that received the medium Se diet 60 min after the oral challenge with whey compared to the positive control group, which is indicative of impaired anaphylaxis. This was accompanied by reductions in antigen-specific immunoglobulins and reduced levels of mouse mast cell protease-1 (mMCP-1). This study demonstrates that oral Se supplementation may modulate allergic responses to whey by decreasing specific antibody responses and mMCP-1 release.
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Affiliation(s)
- Xiaoli Zhao
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; (X.Z.); (H.C.)
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, 3584 CG Utrecht, The Netherlands; (S.T.); (J.G.); (L.M.J.K.)
- School of Food Science Technology, Nanchang University, Nanchang 330047, China
- Sino-German Joint Research Institute, Nanchang University, Nanchang 330047, China
| | - Suzan Thijssen
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, 3584 CG Utrecht, The Netherlands; (S.T.); (J.G.); (L.M.J.K.)
| | - Hongbing Chen
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; (X.Z.); (H.C.)
- Sino-German Joint Research Institute, Nanchang University, Nanchang 330047, China
| | - Johan Garssen
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, 3584 CG Utrecht, The Netherlands; (S.T.); (J.G.); (L.M.J.K.)
- Danone/Nutricia Research, Global Centre of Excellence Immunology, 3584 CT Utrecht, The Netherlands
| | - Leon M. J. Knippels
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, 3584 CG Utrecht, The Netherlands; (S.T.); (J.G.); (L.M.J.K.)
- Danone/Nutricia Research, Global Centre of Excellence Immunology, 3584 CT Utrecht, The Netherlands
| | - Astrid Hogenkamp
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, 3584 CG Utrecht, The Netherlands; (S.T.); (J.G.); (L.M.J.K.)
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4
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Lv L, Zhang H, Liu Z, Lei L, Feng Z, Zhang D, Ren Y, Zhao S. Comparative study of yeast selenium vs. sodium selenite on growth performance, nutrient digestibility, anti-inflammatory and anti-oxidative activity in weaned piglets challenged by Salmonella typhimurium. Innate Immun 2020; 26:248-258. [PMID: 31766926 PMCID: PMC7251790 DOI: 10.1177/1753425919888566] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 10/06/2019] [Accepted: 10/22/2019] [Indexed: 11/28/2022] Open
Abstract
The present study was conducted to investigate the effects of dietary supplementation of selenium from different sources on the growth performance, nutrient digestibility, and blood immune indices of piglets orally challenged with Salmonella typhimurium (ST). In a 2 × 2 factorial arrangement, 32 piglets (6.43 ± 0.54 kg of body mass) were assigned into four groups with or without dietary inclusion of sodium selenite (SS) or yeast selenium (YS) and with or without ST challenge (5 ml 1 × 109 cfu/ml ST or 5 ml saline) on d 13. In each period, YS increased average daily feed intake and average daily gain but did not reach statistical significance. During the challenged stage, piglets fed YS had higher digestibility of dry matter, crude protein, crude fat, and YS reduced the amount of Escherichia coli in feces. Additionally, YS regulated the composition of T-lymphocyte subset and influenced the production of inflammatory cytokines. In conclusion, in this study selenium-enriched yeast was more effective in enhancing nutrient digestibility, and inhibiting inflammation and oxidative stress by inducing the activity of the lymphocytes, expression of antioxidant enzymes and so on.
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Affiliation(s)
- Liangkang Lv
- Hubei Collaborative Innovation Center for Animal
Nutrition and Feed Safety, Hubei Key Laboratory of Animal Nutrition and Feed
Science,
Wuhan
Polytechnic University, China
| | - Hui Zhang
- Hubei Collaborative Innovation Center for Animal
Nutrition and Feed Safety, Hubei Key Laboratory of Animal Nutrition and Feed
Science,
Wuhan
Polytechnic University, China
| | - Zhengya Liu
- Hubei Collaborative Innovation Center for Animal
Nutrition and Feed Safety, Hubei Key Laboratory of Animal Nutrition and Feed
Science,
Wuhan
Polytechnic University, China
| | - Long Lei
- Hubei Collaborative Innovation Center for Animal
Nutrition and Feed Safety, Hubei Key Laboratory of Animal Nutrition and Feed
Science,
Wuhan
Polytechnic University, China
| | - Zhi Feng
- Hubei Collaborative Innovation Center for Animal
Nutrition and Feed Safety, Hubei Key Laboratory of Animal Nutrition and Feed
Science,
Wuhan
Polytechnic University, China
| | - Dandan Zhang
- Hubei Collaborative Innovation Center for Animal
Nutrition and Feed Safety, Hubei Key Laboratory of Animal Nutrition and Feed
Science,
Wuhan
Polytechnic University, China
| | - Ying Ren
- Hubei Collaborative Innovation Center for Animal
Nutrition and Feed Safety, Hubei Key Laboratory of Animal Nutrition and Feed
Science,
Wuhan
Polytechnic University, China
| | - Shengjun Zhao
- Hubei Collaborative Innovation Center for Animal
Nutrition and Feed Safety, Hubei Key Laboratory of Animal Nutrition and Feed
Science,
Wuhan
Polytechnic University, China
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5
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Dalgaard TS, Briens M, Engberg RM, Lauridsen C. The influence of selenium and selenoproteins on immune responses of poultry and pigs. Anim Feed Sci Technol 2018; 238:73-83. [PMID: 32336871 PMCID: PMC7173062 DOI: 10.1016/j.anifeedsci.2018.01.020] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 01/26/2018] [Accepted: 01/29/2018] [Indexed: 12/21/2022]
Abstract
Selenium is an essential nutrient for poultry and pigs, and is important for a number of physiological processes including regulation and function of the immune system. Through its incorporation into selenoproteins, Se is involved in the regulation of oxidative stress, redox mechanisms, and other crucial cellular processes involved in innate and adaptive immune response. This review provides current knowledge on the mechanisms by which selenium can modulate the resilience to infectious diseases, and how this micronutrient can influence the capacity of the bird or the pig to maintain its productivity during an infectious challenge. In relation to the most frequent and economically important infectious diseases in poultry and pig production, the present paper considers the influence of different selenium sources (organic vs. inorganic Se) as well as dietary concentrations on the immune responses of poultry and pigs with major emphasis on the potential beneficial impact on animal resilience to common infectious diseases.
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Affiliation(s)
- Tina S Dalgaard
- Dept. of Animal Science, Aarhus University, Blichers allé 20, 8830 Tjele, Denmark
| | - Mickaël Briens
- Adisseo France, CERN, 6 Route Noire, 03600 Commentry, France
| | - Ricarda M Engberg
- Dept. of Animal Science, Aarhus University, Blichers allé 20, 8830 Tjele, Denmark
| | - Charlotte Lauridsen
- Dept. of Animal Science, Aarhus University, Blichers allé 20, 8830 Tjele, Denmark
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6
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Boostani A, Sadeghi A, Mousavi S, Chamani M, Kashan N. Effects of organic, inorganic, and nano-Se on growth performance, antioxidant capacity, cellular and humoral immune responses in broiler chickens exposed to oxidative stress. Livest Sci 2015. [DOI: 10.1016/j.livsci.2015.05.004] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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7
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Xu SZ, Lee SH, Lillehoj HS, Bravo D. Dietary sodium selenite affects host intestinal and systemic immune response and disease susceptibility to necrotic enteritis in commercial broilers. Br Poult Sci 2015; 56:103-12. [DOI: 10.1080/00071668.2014.984160] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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8
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Xu S, Lee SH, Lillehoj HS, Hong YH, Bravo D. Effects of dietary selenium on host response to necrotic enteritis in young broilers. Res Vet Sci 2014; 98:66-73. [PMID: 25575447 DOI: 10.1016/j.rvsc.2014.12.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 11/17/2014] [Accepted: 12/03/2014] [Indexed: 11/18/2022]
Abstract
The effects of dietary supplementation of young broiler chickens with an organic selenium (Se) formulation, B-Traxim Se, on experimental necrotic enteritis (NE) were studied. Chickens treated with three Se doses (0.25, 0.50, 1.00 mg/kg) from hatch were orally challenged with Eimeria maxima at 14 days of age followed by Clostridium perfringens to induce NE. Chickens fed with 0.50 mg/kg Se showed significantly increased body weights and antibody levels against NetB, and significantly reduced gut lesions compared with non-supplemented chickens. However, there were no significant differences in Eimeria oocyst shedding between the Se-treated and non-supplemented groups. Levels of IL-1β, IL-6, IL-8, iNOS, LITAF, TNFSF15, AvBD6, AvBD8, and AvBD13 transcripts were increased in the gut and spleen of at least one of the three Se-treated groups compared with the non-treated group. These results suggest that dietary supplementation of young broilers with Se might be beneficial to reduce the negative consequence of NE.
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Affiliation(s)
- Shouzhen Xu
- College of Animal Science and Veterinary Medicine, Qingdao Agricultural University, Qingdao, Shandong 266109, China; Animal Biosciences and Biotechnology Laboratory, Beltsville Agricultural Research Center, Agricultural Research Service, USDA, Beltsville, MD 20705, USA
| | - Sung-Hyen Lee
- Animal Biosciences and Biotechnology Laboratory, Beltsville Agricultural Research Center, Agricultural Research Service, USDA, Beltsville, MD 20705, USA; National Academy of Agricultural Science, Rural Development Administration, 166, Nongsaengmyeong-ro, Iseo-myeon, Wanju-Gun, Jeollabuk-do, 565-851, Korea
| | - Hyun S Lillehoj
- Animal Biosciences and Biotechnology Laboratory, Beltsville Agricultural Research Center, Agricultural Research Service, USDA, Beltsville, MD 20705, USA.
| | - Yeong Ho Hong
- Department of Animal Science and Technology, Chung-Ang University, Anseong 456-756, Korea
| | - David Bravo
- InVivo NSA, Talhouët, 56250, St Nolff, France
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9
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He Y, Fang J, Peng X, Cui H, Zuo Z, Deng J, Chen Z, Geng Y, Lai W, Shu G, Tang L. Effects of sodium selenite on aflatoxin B1-induced decrease of ileal IgA+ cell numbers and immunoglobulin contents in broilers. Biol Trace Elem Res 2014; 160:49-55. [PMID: 24909240 DOI: 10.1007/s12011-014-0035-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2014] [Accepted: 05/28/2014] [Indexed: 10/25/2022]
Abstract
This study was aimed to assess the protective effect of sodium selenite on the ileum mucosal immunologic injury induced by AFB1. One hundred eighty-one-day-old healthy male Avian broilers were divided into four groups of three replicates and 15 birds per replicate and fed with basal diet (control group), 0.3 mg/kg AFB1 (AFB1 group), 0.4 mg/kg Se (+Se group), and 0.3 mg/kg AFB1 + 0.4 mg/kg Se (AFB1 + Se group) respectively. The numbers of IgA(+) cells of ileum were determined by immunohistochemistry as well as the contents of sIgA, IgA, IgG, and IgM in the mucosa of ileum by ELISA. Compared with those in the control group, the numbers of IgA(+) cells as well as the sIgA, IgA, IgG, and IgM contents were decreased in the AFB1 group. However, compared with those in the AFB1 group, the numbers of IgA(+) cells as well as the sIgA, IgA, IgG, and IgM contents were increased in the AFB1 + Se group, and these data had no difference between AFB1 + Se group and control group. It was concluded that 0.3 mg/kg AFB1 could reduce the humoral immune function of the ileum mucosa, but 0.4 mg/kg supplemented dietary selenium could protect the mucosal humoral immune function from AFB1-induced impairment.
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Affiliation(s)
- Yang He
- Key Laboratory of Animal Diseases and Environmental Hazards of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Ya'an, 625014, China
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10
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He Y, Fang J, Peng X, Cui H, Zuo Z, Deng J, Chen Z, Lai W, Shu G, Tang L. Effects of sodium selenite on aflatoxin B1-induced decrease of ileac T cell and the mRNA contents of IL-2, IL-6, and TNF-α in broilers. Biol Trace Elem Res 2014; 159:167-73. [PMID: 24807686 DOI: 10.1007/s12011-014-9999-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 04/28/2014] [Indexed: 01/15/2023]
Abstract
The aim of this work was to assess the protective effect of sodium selenite on the ileum mucosal immunologic toxicity induced by aflatoxin B1 (AFB1). One hundred and eighty one-day-old healthy male avian broilers were divided into four groups of three replicates and 15 birds per replicate and fed with basal diet (control group), 0.3 mg/kg AFB1 (AFB1 group), 0.4 mg/kg Se (+Se group), and 0.3 mg/kg AFB1+0.4 mg/kg Se (AFB1+Se group), respectively. The ileac T-cell subsets were determined by the methods of flow cytometry (FCM), and the mRNA contents of interleukin-2 (IL-2), interleukin-6(IL-6), and tumor necrosis factor-alpha (TNF-α) by quantitative real-time PCR. Compared with those in control group, the percentages of CD3+, CD3+CD4+, CD3+CD8+ intraepithelial lymphocytes (IELs) and LPLs, the CD4+/CD8+ ratio of IELs, and the mRNA contents of IL-2, IL-6, and TNF-α were decreased in AFB1 group. However, compared with those in AFB1 group, these parameters of AFB1+Se group were increased to be close to those in control group. It was concluded that 0.3 mg/kg AFB1 could reduce the cellular immune function of the ileum mucosa, but 0.4 mg/kg supplemented dietary selenium showed protective effects on AFB1-induced immunologic injury.
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Affiliation(s)
- Yang He
- Key Laboratory of Animal Diseases and Environmental Hazards of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Ya'an, Sichuan, 625014, China
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11
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Effects of sodium selenite on the decreased percentage of T cell subsets, contents of serum IL-2 and IFN-γ induced by aflatoxin B1 in broilers. Res Vet Sci 2013; 95:143-5. [DOI: 10.1016/j.rvsc.2013.02.019] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Revised: 02/20/2013] [Accepted: 02/27/2013] [Indexed: 11/21/2022]
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12
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Peng X, Cui H, Fang J, Zuo Z, Deng J, Pan K, Lai W, Zhou Y. Low selenium diet alters cell cycle phase, apoptotic population and modifies oxidative stress markers of spleens in broilers. Biol Trace Elem Res 2012; 148:182-6. [PMID: 22351106 DOI: 10.1007/s12011-012-9357-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Accepted: 02/05/2012] [Indexed: 10/28/2022]
Abstract
The purpose of this 42-day study was to investigate the effects of low selenium (Se) on histopathological changes of spleen, cell cycle and apoptosis of splenocytes, and oxidative status of the spleen. One hundred twenty 1-day-old avian broilers were randomly divided into two groups of 60 each and were fed on a low Se diet (0.0342 mg/kg Se) or a control diet (0.2 mg/kg Se), respectively. The weight and relative weight of the spleen were significantly decreased in the low Se group when compared with those of the control group. Histopathologically, splenic lesions in low-Se chicken were characterized by lymphocyte depletion and congestion of red pulp. As measured by flow cytometry, splenocytes in G(0)/G(1) phase were significantly increased, while splenocytes in S phase and G(2) + M phase were obviously decreased in the low Se group. The percentage of apoptotic splenocytes was greatly increased in the low Se group when compared with that of control group. At the same time, the occurrence frequencies of apoptotic splenocytes was markedly increased in the low Se group with the appearance of condensed nucleus ultrastructurally. Oxidative stress in the spleens of the low Se group was evidenced by decrease in glutathione peroxidase and catalase activities and increase in malondialdehyde contents. The results showed that low Se diet intake caused increased apoptosis, arrested cell cycle, and obvious oxidative stress, which provided a possible pathway for the injured structure and immune function of the spleen in chickens.
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Affiliation(s)
- Xi Peng
- College of Veterinary Medicine, Sichuan Agricultural University, Ya'an, Sichuan, China 625014
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13
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Priority in selenium homeostasis involves regulation of SepSecS transcription in the chicken brain. PLoS One 2012; 7:e35761. [PMID: 22536434 PMCID: PMC3334997 DOI: 10.1371/journal.pone.0035761] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Accepted: 03/23/2012] [Indexed: 11/19/2022] Open
Abstract
O-phosphoseryl-tRNA:selenocysteinyl-tRNA synthase (SepSecS) is critical for the biosynthesis and transformation of selenocysteine (Sec) and plays an important role in the biological function of Se through the regulation of selenoprotein synthesis. Selenium (Se) and Selenoprotein play a pivotal role in brain function. However, how intake of the micronutrient Se affects gene expression and how genetic factors influence Se metabolism in the brain is unknown. To investigate the regulation of SepSecS transcription induced by Se in the chicken brain, we determined the Se content of brain tissue, SepSecS gene expression levels and mRNA stability in the chicken brain and primary cultured chicken embryos neurons receiving Se supplements. These results showed that Se content in the brain remains remarkably stable during Se supplementation. A significant increase in SepSecS mRNA levels was observed in all of the brain tissues of chickens fed diets containing 1-5 mg/kg sodium selenite. Most strikingly, significant changes in SepSecS mRNA levels were not observed in neurons treated with Se. However, Se altered the SepSecS mRNA half-life in cells. These data suggest that Se could regulate SepSecS mRNA stability in the avian brain and that SepSecS plays an important role in Se homeostasis regulation.
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14
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Ruan H, Zhang Z, Wu Q, Yao H, Li J, Li S, Xu S. Selenium regulates gene expression of selenoprotein W in chicken skeletal muscle system. Biol Trace Elem Res 2012; 145:59-65. [PMID: 21837452 DOI: 10.1007/s12011-011-9166-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Accepted: 07/27/2011] [Indexed: 10/17/2022]
Abstract
Selenoprotein W (SelW) is abundantly expressed in skeletal muscles of mammals and necessary for the metabolism of skeletal muscles. However, its expression pattern in skeletal muscle system of birds is still uncovered. Herein, to investigate the distribution of SelW mRNA in chicken skeletal muscle system and its response to different selenium (Se) status, 1-day-old chickens were exposed to various concentrations of Se as sodium selenite in the feed for 35 days. In addition, myoblasts were treated with different concentrations of Se in the medium for 72 h. Then the levels of SelW mRNA in skeletal muscles (wing muscle, pectoral muscle, thigh muscle) and myoblasts were determined on days 1, 15, 25, and 35 and at 0, 24, 48, and 72 h, respectively. The results showed that SelW was detected in all these muscle components and it increased both along with the growth of organism and the differentiation process of myoblasts. The thigh muscle is more responsive to Se intake than the other two skeletal muscle tissues while the optimal Se supplementation for SelW mRNA expression in chicken myoblasts was 10(-7) M. In summary, Se plays important roles in the development of chicken skeletal muscles. To effect optimal SelW gene expression, Se must be provided in the diet and the media in adequate amounts and neither at excessive nor deficient levels.
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Affiliation(s)
- Hongfeng Ruan
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, People's Republic of China.
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15
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Characterization and expression of chicken selenoprotein W. Biometals 2011; 24:323-33. [DOI: 10.1007/s10534-010-9401-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2010] [Accepted: 12/09/2010] [Indexed: 10/18/2022]
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