1
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Duliban M, Pawlicki P, Kamińska A, Yurdakok-Dikmen B, Tekin K, Kotula-Balak M. Status of estrogen receptor expression and epigenetic methylation in Leydig cells after exposure to metalloestrogen - selenium. Reprod Toxicol 2023; 118:108389. [PMID: 37142062 DOI: 10.1016/j.reprotox.2023.108389] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 04/26/2023] [Accepted: 05/01/2023] [Indexed: 05/06/2023]
Abstract
The trace element selenium (Se) is essential for the maintenance of spermatogenesis and fertility. A growing volume of evidence shows that Se is necessary for testosterone synthesis, and Se can stimulate Leydig cell proliferation. However, Se can also act as a metalloestrogen, which can mimic estrogen and activate the estrogen receptors. This study aimed to investigate Se effect on estrogen signaling and the epigenetic status of Leydig cells. Mouse Leydig cells (MA-10) were cultured in a medium supplemented with different Se concentrations (4, 8µM) for 24hours. Next, cells were assessed for morphological and molecular (qRT PCR, western blot, immunofluorescence) analyses. Immunofluorescence revealed strong immunosignal for 5-methylcytosine in both control and treated cells, with a stronger signal in the 8μM treated group. qRT-PCR confirmed an increased expression of methyltransferase 3β (Dnmt3b) in 8μM cells. Analysis of the expression of γH2AX (a marker for double-stranded DNA breaks) revealed an increase in the DNA breaks in cells exposed to 8μM Se. Selenium exposure did not affect the expression of canonical estrogen receptors (ERα and ERβ), however, an increase in membrane estrogen receptor G-protein coupled (GPER) protein expression was observed. To sum up, in a high concentration (8μM) Se affects GPER expression (non-genomic estrogen signaling) in Leydig cells possibly via acting on receptor protein and/or its binding. This causes DNA breaks and induces changes in Leydig cell methylation status, especially in de novo methylation which is mediated by Dnmt3b.
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Affiliation(s)
- M Duliban
- Department of Endocrinology, Institute of Zoology, Jagiellonian University in Krakow, Gronostajowa 9, 30-387 Krakow, Poland.
| | - P Pawlicki
- Center of Experimental and Innovative Medicine, University of Agriculture in Krakow, Redzina 1c, 30-248 Krakow, Poland
| | - A Kamińska
- Department of Endocrinology, Institute of Zoology, Jagiellonian University in Krakow, Gronostajowa 9, 30-387 Krakow, Poland
| | - B Yurdakok-Dikmen
- Department of Pharmacology and Toxicology, Ankara University Faculty of Veterinary Medicine, Ankara 06110 Dışkapı, Turkey
| | - K Tekin
- Department of Reproduction and Artificial Insemination Ankara University Faculty of Veterinary Medicine, Ankara 06110 Dışkapı, Turkey
| | - M Kotula-Balak
- Department of Anatomy and Preclinical Sciences, University Centre of Veterinary Medicine, University of Agriculture in Krakow, Mickiewicza 24/28, 30-059, Krakow, Poland.
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Dessì A, Bosco A, Pintus R, Picari G, Mazza S, Fanos V. Epigenetics and Modulations of Early Flavor Experiences: Can Metabolomics Contribute to Prevention during Weaning? Nutrients 2021; 13:nu13103351. [PMID: 34684350 PMCID: PMC8539480 DOI: 10.3390/nu13103351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 09/16/2021] [Accepted: 09/20/2021] [Indexed: 11/29/2022] Open
Abstract
The significant increase in chronic non-communicable diseases has changed the global epidemiological landscape. Among these, obesity is the most relevant in the pediatric field. This has pushed the world of research towards a new paradigm: preventive and predictive medicine. Therefore, the window of extreme plasticity that characterizes the first stage of development cannot be underestimated. In this context, nutrition certainly plays a primary role, being one of the most important epigenetic modulators known to date. Weaning, therefore, has a crucial role that must be analyzed far beyond the simple achievement of nutritional needs. Furthermore, the taste experience and the family context are fundamental for future food choices and can no longer be underestimated. The use of metabolomics allows, through the recognition of early disease markers and food-specific metabolites, the planning of an individualized and precise diet. In addition, the possibility of identifying particular groups of subjects at risk and the careful monitoring of adherence to dietary therapy may represent the basis for this change.
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Li P, Ning Y, Wang W, Guo X, Poulet B, Wang X, Wen Y, Han J, Hao J, Liang X, Liu L, Du Y, Cheng B, Cheng S, Zhang L, Ma M, Qi X, Liang C, Wu C, Wang S, Zhao H, Zhao G, Goldring MB, Zhang F, Xu P. The integrative analysis of DNA methylation and mRNA expression profiles confirmed the role of selenocompound metabolism pathway in Kashin-Beck disease. Cell Cycle 2020; 19:2351-2366. [PMID: 32816579 DOI: 10.1080/15384101.2020.1807665] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Kashin-Beck disease (KBD) is an endemic chronic osteochondropathy. The etiology of KBD remains unknown. In this study, we conducted an integrative analysis of genome-wide DNA methylation and mRNA expression profiles between KBD and normal controls to identify novel candidate genes and pathways for KBD. Articular cartilage samples from 17 grade III KBD patients and 17 healthy controls were used in this study. DNA methylation profiling of knee cartilage and mRNA expression profile data were obtained from our previous studies. InCroMAP was performed to integrative analysis of genome-wide DNA methylation profiles and mRNA expression profiles. Gene ontology (GO) enrichment analysis was conducted by online DAVID 6.7. The quantitative real-time polymerase chain reaction (qPCR), Western blot, immunohistochemistry (IHC), and lentiviral vector transfection were used to validate one of the identified pathways. We identified 298 common genes (such as COL4A1, HOXA13, TNFAIP6 and TGFBI), 36 GO terms (including collagen function, skeletal system development, growth factor), and 32 KEGG pathways associated with KBD (including Selenocompound metabolism pathway, PI3K-Akt signaling pathway, and TGF-beta signaling pathway). Our results suggest the dysfunction of many genes and pathways implicated in the pathogenesis of KBD, most importantly, both the integrative analysis and in vitro study in KBD cartilage highlighted the importance of selenocompound metabolism pathway in the pathogenesis of KBD for the first time.
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Affiliation(s)
- Ping Li
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University , Xi'an, China
| | - Yujie Ning
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University , Xi'an, China
| | - Weizhuo Wang
- Department of Orthopedics, the Second Affiliated Hospital, Health Science Center, Xi'an Jiaotong University , Xi'an, China
| | - Xiong Guo
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University , Xi'an, China
| | - Blandine Poulet
- Institute of Ageing and Chronic Diseases, University of Liverpool , Liverpool, UK
| | - Xi Wang
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University , Xi'an, China
| | - Yan Wen
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University , Xi'an, China
| | - Jing Han
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University , Xi'an, China
| | - Jingcan Hao
- Cancer Center, The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an, China
| | - Xiao Liang
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University , Xi'an, China
| | - Li Liu
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University , Xi'an, China
| | - Yanan Du
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University , Xi'an, China
| | - Bolun Cheng
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University , Xi'an, China
| | - Shiqiang Cheng
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University , Xi'an, China
| | - Lu Zhang
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University , Xi'an, China
| | - Mei Ma
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University , Xi'an, China
| | - Xin Qi
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University , Xi'an, China
| | - Chujun Liang
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University , Xi'an, China
| | - Cuiyan Wu
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University , Xi'an, China
| | - Sen Wang
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University , Xi'an, China
| | - Hongmou Zhao
- Department of Joint Surgery, The Red Cross Hospital of Xi'an Jiaotong University , Xi'an, China
| | - Guanghui Zhao
- Department of Joint Surgery, The Red Cross Hospital of Xi'an Jiaotong University , Xi'an, China
| | - Mary B Goldring
- Hospital for Special Surgery, Weill College of Medicine of Cornell University , New York, NY, USA
| | - Feng Zhang
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University , Xi'an, China
| | - Peng Xu
- Department of Joint Surgery, The Red Cross Hospital of Xi'an Jiaotong University , Xi'an, China
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Hoffman ML, Reed SA, Pillai SM, Jones AK, McFadden KK, Zinn SA, Govoni KE. PHYSIOLOGY AND ENDOCRINOLOGY SYMPOSIUM:The effects of poor maternal nutrition during gestation on offspring postnatal growth and metabolism. J Anim Sci 2017; 95:2222-2232. [PMID: 28727021 DOI: 10.2527/jas.2016.1229] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Poor maternal nutrition during gestation has been linked to poor growth and development, metabolic dysfunction, impaired health, and reduced productivity of offspring in many species. Poor maternal nutrition can be defined as an excess or restriction of overall nutrients or specific macro- or micronutrients in the diet of the mother during gestation. Interestingly, there are several reports that both restricted- and over-feeding during gestation negatively affect offspring postnatal growth with reduced muscle and bone deposition, increased adipose accumulation, and metabolic dysregulation through reduced leptin and insulin sensitivity. Our laboratory and others have used experimental models of restricted- and over-feeding during gestation to evaluate effects on early postnatal growth of offspring. Restricted- and over-feeding during gestation alters body size, circulating growth factors, and metabolic hormones in offspring postnatally. Both restricted- and over-feeding alter muscle growth, increase lipid content in the muscle, and cause changes in expression of myogenic factors. Although the negative effects of poor maternal nutrition on offspring growth have been well characterized in recent years, the mechanisms contributing to these changes are not well established. Our laboratory has focused on elucidating these mechanisms by evaluating changes in gene and protein expression, and stem cell function. Through RNA-Seq analysis, we observed changes in expression of genes involved in protein synthesis, metabolism, cell function, and signal transduction in muscle tissue. We recently reported that satellite cells, muscle stem cells, have altered expression of myogenic factors in offspring from restricted-fed mothers. Bone marrow derived mesenchymal stem cells, multipotent cells that contribute to development and maintenance of several tissues including bone, muscle, and adipose, have a 50% reduction in cell proliferation and altered metabolism in offspring from both restricted- and over-fed mothers. These findings indicate that poor maternal nutrition may alter offspring postnatal growth by programming stem cell populations. In conclusion, poor maternal nutrition during gestation negatively affects offspring postnatal growth, potentially through impaired stem and satellite cell function. Therefore, determining the mechanisms that contribute to fetal programming is critical to identifying effective management interventions for these offspring and improving efficiency of production.
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Forster VJ, McDonnell A, Theobald R, McKay JA. Effect of methotrexate/vitamin B 12 on DNA methylation as a potential factor in leukemia treatment-related neurotoxicity. Epigenomics 2017; 9:1205-1218. [PMID: 28809129 PMCID: PMC5638018 DOI: 10.2217/epi-2016-0165] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Methotrexate (MTX) is administered to treat childhood acute lymphoblastic leukemia (ALL). It acts by inhibiting dihydrofolate reductase which reduces methyltetrahydrofolate, a key component in one carbon metabolism, thus reducing cell proliferation. Further perturbations to one carbon metabolism, such as reduced vitamin B12 levels via the use of nitrous oxide for sedation during childhood ALL treatment, may increase neurotoxicity risk. With B12 as an enzymatic cofactor, methyltetrahydrofolate is essential to produce methionine, which is critical for DNA methylation. We investigated global and gene specific DNA methylation in neuronal cell lines in response to MTX treatment and vitamin B12 concentration individually, and in combination. Results: MTX treatment alone significantly increased LINE-1 methylation in SH-SY5Y (p = 0.040) and DAOY (p < 0.001), and increased FKBP5 methylation in MO3.13 cells (p = 0.009). Conclusion: We conclude that altered DNA methylation of brain/central nervous system cells could be one mechanism involved in MTX treatment-related neurotoxicities and neurocognitive late effects in ALL survivors.
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Affiliation(s)
- Victoria J Forster
- Northern Institute for Cancer Research, Newcastle University, Newcastle upon Tyne, UK
| | - Alex McDonnell
- Institute of Health & Society, Human Nutrition Research Centre, Newcastle University, Newcastle upon Tyne, UK
| | - Rachel Theobald
- Institute of Health & Society, Human Nutrition Research Centre, Newcastle University, Newcastle upon Tyne, UK
| | - Jill A McKay
- Institute of Health & Society, Human Nutrition Research Centre, Newcastle University, Newcastle upon Tyne, UK
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Schroeder M, Jakovcevski M, Polacheck T, Lebow M, Drori Y, Engel M, Ben-Dor S, Chen A. A Methyl-Balanced Diet Prevents CRF-Induced Prenatal Stress-Triggered Predisposition to Binge Eating-like Phenotype. Cell Metab 2017; 25:1269-1281.e6. [PMID: 28576418 DOI: 10.1016/j.cmet.2017.05.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 01/30/2017] [Accepted: 05/08/2017] [Indexed: 12/31/2022]
Abstract
Binge eating (BE) is a common aberrant form of eating behavior, characterized by overconsumption of food in a brief period of time. Recurrent episodes of BE constitute the BE disorder, which mostly affects females and is associated with early-life adversities. Here, we show that corticotropin releasing factor (CRF)-induced prenatal stress (PNS) in late gestation predisposes female offspring to BE-like behavior that coincides with hypomethylation of hypothalamic miR-1a and downstream dysregulation of the melanocortin system through Pax7/Pax3. Moreover, exposing the offspring to a methyl-balanced diet during adolescence prevents the dysregulation and predisposition from being triggered. We demonstrate that gestational programming, per se, will not lead to BE-like behavior, but pre-existing alterations due to prenatal programming are revealed only when challenged during adolescence. We provide experimental evidence for long-term epigenetic abnormalities stemming from PNS in predisposing female offspring to BE disorder as well as a potential non-invasive prevention strategy.
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Affiliation(s)
- Mariana Schroeder
- Department of Neurobiology, Weizmann Institute of Science, Rehovot 76100, Israel; Department of Stress Neurobiology and Neurogenetics, Max-Planck Institute of Psychiatry, Munich 80804, Germany
| | - Mira Jakovcevski
- Department of Stress Neurobiology and Neurogenetics, Max-Planck Institute of Psychiatry, Munich 80804, Germany
| | - Tamar Polacheck
- Department of Neurobiology, Weizmann Institute of Science, Rehovot 76100, Israel; Department of Stress Neurobiology and Neurogenetics, Max-Planck Institute of Psychiatry, Munich 80804, Germany
| | - Maya Lebow
- Department of Neurobiology, Weizmann Institute of Science, Rehovot 76100, Israel; Department of Stress Neurobiology and Neurogenetics, Max-Planck Institute of Psychiatry, Munich 80804, Germany
| | - Yonat Drori
- Department of Neurobiology, Weizmann Institute of Science, Rehovot 76100, Israel; Department of Stress Neurobiology and Neurogenetics, Max-Planck Institute of Psychiatry, Munich 80804, Germany
| | - Mareen Engel
- Department of Stress Neurobiology and Neurogenetics, Max-Planck Institute of Psychiatry, Munich 80804, Germany
| | - Shifra Ben-Dor
- Bioinformatics and Biological Computing Unit, Biological Services, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Alon Chen
- Department of Neurobiology, Weizmann Institute of Science, Rehovot 76100, Israel; Department of Stress Neurobiology and Neurogenetics, Max-Planck Institute of Psychiatry, Munich 80804, Germany.
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7
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McKay JA, Xie L, Adriaens M, Evelo CT, Ford D, Mathers JC. Maternal folate depletion during early development and high fat feeding from weaning elicit similar changes in gene expression, but not in DNA methylation, in adult offspring. Mol Nutr Food Res 2017; 61. [DOI: 10.1002/mnfr.201600713] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 11/21/2016] [Accepted: 11/21/2016] [Indexed: 12/11/2022]
Affiliation(s)
- Jill A. McKay
- Human Nutrition Research Centre; Institute for Health and Society; Newcastle University; UK
| | - Long Xie
- Human Nutrition Research Centre, Institute of Cellular Medicine; Newcastle University; UK
| | - Michiel Adriaens
- Maastricht Centre for Systems Biology; Maastricht The Netherlands
| | - Chris T. Evelo
- Department of Bioinformatics - BiGCaT; Maastricht University; Maastricht The Netherlands
| | - Dianne Ford
- Human Nutrition Research Centre, Institute for Cell and Molecular Biosciences; Newcastle University; UK
- Faculty of Health and Life Sciences; Northumbria University; UK
| | - John C. Mathers
- Human Nutrition Research Centre, Institute of Cellular Medicine; Newcastle University; UK
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8
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McKay JA, Adriaens M, Evelo CT, Ford D, Mathers JC. Gene promoter DNA methylation patterns have a limited role in orchestrating transcriptional changes in the fetal liver in response to maternal folate depletion during pregnancy. Mol Nutr Food Res 2016; 60:2031-42. [PMID: 27133805 PMCID: PMC5031189 DOI: 10.1002/mnfr.201600079] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 03/15/2016] [Accepted: 04/04/2016] [Indexed: 12/12/2022]
Abstract
SCOPE Early-life exposures are critical in fetal programming and may influence function and health in later life. Adequate maternal folate consumption during pregnancy is essential for healthy fetal development and long-term offspring health. The mechanisms underlying fetal programming are poorly understood, but are likely to involve gene regulation. Epigenetic marks, including DNA methylation, regulate gene expression and are modifiable by folate supply. We observed transcriptional changes in fetal liver in response to maternal folate depletion and hypothesized that these changes are concomitant with altered gene promoter methylation. METHODS AND RESULTS Female C57BL/6J mice were fed diets containing 2 or 0.4 mg folic acid/kg for 4 wk before mating and throughout pregnancy. At 17.5-day gestation, genome-wide gene expression and promoter methylation were measured by microarray analysis in male fetal livers. While 989 genes were differentially expressed, 333 promoters had altered methylation (247 hypermethylated, 86 hypomethylated) in response to maternal folate depletion. Only 16 genes had both expression and methylation changes. However, most methylation changes occurred in genomic regions neighboring expression changes. CONCLUSION In response to maternal folate depletion, altered expression at the mRNA level was not associated with altered promoter methylation of the same gene in fetal liver.
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Affiliation(s)
- Jill A McKay
- Human Nutrition Research Centre, Institute of Health and Society, Newcastle University, Newcastle upon Tyne, UK.
| | - Michiel Adriaens
- Maastricht Centre for Systems Biology-MaCSBio, Maastricht University, Maastricht, the Netherlands
| | - Chris T Evelo
- Department of Bioinformatics-BiGCaT, Maastricht University, Maastricht, the Netherlands
| | - Dianne Ford
- Human Nutrition Research Centre, Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle upon Tyne, UK
| | - John C Mathers
- Human Nutrition Research Centre, Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
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9
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Nakken HL, Lephart ED, Hopkins TJ, Shaw B, Urie PM, Christensen MJ. Prenatal exposure to soy and selenium reduces prostate cancer risk factors in TRAMP mice more than exposure beginning at six weeks. Prostate 2016; 76:588-96. [PMID: 26817824 DOI: 10.1002/pros.23150] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Accepted: 12/31/2015] [Indexed: 12/12/2022]
Abstract
BACKGROUND Diets high in soy and selenium (Se) decrease prostate cancer risk factors in healthy rats. The purpose of this study was to determine whether treatment with high levels of soy and/or supplemental Se would decrease prostate cancer risk factors in the Transgenic Adenocarcinoma of Mouse Prostate (TRAMP) mouse, and whether timing of the introduction of these nutrients would affect risk reduction. METHODS Male hemizygous [C57BL/6 × FVB]F1 TRAMP mice were exposed to stock diets high or devoid of soy, with or without a supplement of Se-methylselenocysteine (MSC) starting at conception (10 mg Se/L in drinking water of pregnant/nursing dams; daily bolus of 4 mg Se/kg body weight to pups after weaning) or at 6 weeks of age in a 2 × 2 factorial design. Mice were killed at 12 weeks (n per dietary treatment = 20-30). RESULTS Liver and serum Se concentrations were increased by MSC supplementation (P < 0.001), high-soy diet (P < 0.05), and initiation of dietary treatments at conception (P < 0.05). MSC supplementation had greater effects in mice fed the zero-soy basal diet, compared to the high-soy formulation (Pinteraction < 0.01). These same three interventions, individually and interactively, decreased body weight and epididymal fat pad weights, and steady state levels of mRNA for Cyp19a1 (aromatase) and Srd5a1 (5α-reductase). In contrast, MSC was the only treatment that decreased urogenital tract weights (P < 0.001), serum IGF-1 levels (P < 0.002), and Gleason scores (P < 0.05). CONCLUSIONS Supplemental MSC reduces risk of prostate cancer in TRAMP mice. Basal diet composition (zero- vs. high-soy) can modify MSC's chemopreventive effects. Initiation of dietary treatments from conception maximizes chemopreventive effects of MSC. Prenatal Se status may have long-lasting effects on development and progression of prostate cancer.
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Affiliation(s)
- Heather L Nakken
- Department of Nutrition, Dietetics, and Food Science, Brigham Young University, Provo, Utah
| | - Edwin D Lephart
- Department of Physiology and Developmental Biology, Brigham Young University, Provo, Utah
| | - Tyler J Hopkins
- Department of Nutrition, Dietetics, and Food Science, Brigham Young University, Provo, Utah
| | - Brett Shaw
- Department of Nutrition, Dietetics, and Food Science, Brigham Young University, Provo, Utah
| | - Paul M Urie
- Utah Valley Regional Medical Center, Provo, Utah
| | - Merrill J Christensen
- Department of Nutrition, Dietetics, and Food Science, Brigham Young University, Provo, Utah
- Simmons Center for Cancer Research, Brigham Young University, Provo, Utah
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10
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Karunasinghe N, Zhu S, Ferguson LR. Benefits of Selenium Supplementation on Leukocyte DNA Integrity Interact with Dietary Micronutrients: A Short Communication. Nutrients 2016; 8:E249. [PMID: 27128937 PMCID: PMC4882662 DOI: 10.3390/nu8050249] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 04/19/2016] [Accepted: 04/21/2016] [Indexed: 01/05/2023] Open
Abstract
A male cohort from New Zealand has previously shown variability in Selenium (Se) supplementation effects on measured biomarkers. The current analysis is to understand the reasons for variability of the H₂O₂-induced DNA damage recorded after Se supplementation. We have looked at the variation of demographic, lifestyle, medication, genetic and dietary factors and biomarkers measured at baseline and post-supplementation in these two extreme subgroups A and B. Group A showed increased H₂O₂-induced DNA damage and group B showed decreased damage after Se supplementation. We have also considered correlations of biomarkers and dietary factors in the complete dataset. The glutathione peroxidase (GPx) activity and DNA damage were significantly lower at post-supplementation in Group B compared to Group A. Post-supplementation, Group B showed a significant reduction in the GPx activity, while Group A showed a significant increase in DNA damage compared to baseline levels. Dietary methionine intake was significantly higher and folate intake was significantly lower in Group B compared to Group A. Se supplementation significantly increased the caspase-cleaved keratin 18 levels in both groups, indicating increased apoptotic potential of this supplement. Parameter correlation with the complete dataset showed dietary methionine to have a significant negative correlation with H₂O₂-induced DNA damage post-supplementation. The data suggest that Se supplementation is beneficial for the leukocyte DNA integrity only in interaction with the dietary methionine and folate intake.
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Affiliation(s)
- Nishi Karunasinghe
- Auckland Cancer Society Research Centre, Faculty of Medical and Health Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
| | - Shuotun Zhu
- Discipline of Nutrition, Faculty of Medical and Health Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
| | - Lynnette R Ferguson
- Auckland Cancer Society Research Centre, Faculty of Medical and Health Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
- Discipline of Nutrition, Faculty of Medical and Health Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
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11
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Ferguson JF, Allayee H, Gerszten RE, Ideraabdullah F, Kris-Etherton PM, Ordovás JM, Rimm EB, Wang TJ, Bennett BJ. Nutrigenomics, the Microbiome, and Gene-Environment Interactions: New Directions in Cardiovascular Disease Research, Prevention, and Treatment: A Scientific Statement From the American Heart Association. ACTA ACUST UNITED AC 2016; 9:291-313. [PMID: 27095829 DOI: 10.1161/hcg.0000000000000030] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cardiometabolic diseases are the leading cause of death worldwide and are strongly linked to both genetic and nutritional factors. The field of nutrigenomics encompasses multiple approaches aimed at understanding the effects of diet on health or disease development, including nutrigenetic studies investigating the relationship between genetic variants and diet in modulating cardiometabolic risk, as well as the effects of dietary components on multiple "omic" measures, including transcriptomics, metabolomics, proteomics, lipidomics, epigenetic modifications, and the microbiome. Here, we describe the current state of the field of nutrigenomics with respect to cardiometabolic disease research and outline a direction for the integration of multiple omics techniques in future nutrigenomic studies aimed at understanding mechanisms and developing new therapeutic options for cardiometabolic disease treatment and prevention.
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12
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Syed R, Shibata NM, Kharbanda KK, Su RJ, Olson K, Yokoyama A, Rutledge JC, Chmiel KJ, Kim K, Halsted CH, Medici V. Effects of Nonpurified and Choline Supplemented or Nonsupplemented Purified Diets on Hepatic Steatosis and Methionine Metabolism in C3H Mice. Metab Syndr Relat Disord 2016; 14:202-9. [PMID: 26881897 DOI: 10.1089/met.2015.0147] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Previous studies indicated that nonpurified and purified commercially available control murine diets have different metabolic effects with potential consequences on hepatic methionine metabolism and liver histology. METHODS We compared the metabolic and histological effects of commercial nonpurified (13% calories from fat; 57% calories from carbohydrates with 38 grams/kg of sucrose) and purified control diets (12% calories from fat; 69% calories from carbohydrates with ∼500 grams/kg of sucrose) with or without choline supplementation administered to C3H mice with normal lipid and methionine metabolism. Diets were started 2 weeks before mating, continued through pregnancy and lactation, and continued in offspring until 24 weeks of age when we collected plasma and liver tissue to study methionine and lipid metabolism. RESULTS Compared to mice fed nonpurified diets, the liver/body weight ratio was significantly higher in mice fed either purified diet, which was associated with hepatic steatosis and inflammation. Plasma alanine aminotransferase levels were higher in mice receiving the purified diets. The hepatic S-adenosylmethionine (SAM)/S-adenosylhomocysteine (SAH) ratio was higher in female mice fed purified compared to nonpurified diet (4.6 ± 2 vs. 2.8 ± 1.9; P < 0.05). Choline supplementation was associated with improvement of some parameters of lipid and methionine metabolism in mice fed purified diets. CONCLUSIONS Standard nonpurified and purified diets have significantly different effects on development of steatosis in control mice. These findings can help in development of animal models of fatty liver and in choosing appropriate laboratory control diets for control animals.
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Affiliation(s)
- Raisa Syed
- 1 Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of California , Davis, Sacramento, California
| | - Noreene M Shibata
- 1 Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of California , Davis, Sacramento, California
| | - Kusum K Kharbanda
- 2 Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System , Omaha, Nebraska
| | - Ruijun J Su
- 3 Department of Pathology and Laboratory Medicine, University of California , Davis, Sacramento, California
| | - Kristin Olson
- 3 Department of Pathology and Laboratory Medicine, University of California , Davis, Sacramento, California
| | - Amy Yokoyama
- 4 Division of Cardiovascular Medicine, Department of Internal Medicine, University of California , Davis, Davis, California
| | - John C Rutledge
- 4 Division of Cardiovascular Medicine, Department of Internal Medicine, University of California , Davis, Davis, California
| | - Kenneth J Chmiel
- 1 Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of California , Davis, Sacramento, California
| | - Kyoungmi Kim
- 5 Division of Biostatistics, Department of Public Health Sciences, University of California , Davis, Davis, California
| | - Charles H Halsted
- 1 Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of California , Davis, Sacramento, California
| | - Valentina Medici
- 1 Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of California , Davis, Sacramento, California
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Ellingrod VL, Grove TB, Burghardt KJ, Taylor SF, Dalack G. The effect of folate supplementation and genotype on cardiovascular and epigenetic measures in schizophrenia subjects. NPJ SCHIZOPHRENIA 2015; 1:15046. [PMID: 27336047 PMCID: PMC4849464 DOI: 10.1038/npjschz.2015.46] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 10/13/2015] [Accepted: 10/15/2015] [Indexed: 12/31/2022]
Abstract
Background: Metabolic syndrome may be related to folate’s pharmacogenetically regulated metabolism and atypical antipsychotic (AAP) exposure. Aims: We examined folate supplementation on metabolic measures, endothelial functioning (Reactive Hyperemia Index (RHI)), and global methylation in AAP-treated schizophrenia subjects meeting NCEP-ATP-III-a metabolic syndrome criteria. Methods: Subjects were given 5 mg/day open label folate for 3 months. Baseline and end point measurements included RHI, body mass index, fasting metabolic laboratory measures, C-reactive protein, homocysteine, IL-6, and leptin. Subjects were genotyped for methylenetetrahydrofolate reductase (MTHFR) 677C/T and catechol-O-methyltransferase (COMT) 158 Val/Met, as well as global DNA methylation using the LUminometric Methylation Assay (LUMA). Results: Thirty-five subjects (mean age 50±9 years and 70% Caucasian) were included. At end point, RHI improved by 20% (P=0.02), homocysteine decreased 14% (P=0.006), and IL-6 decreased 13% (P=0.09). At baseline, 61% met endothelial dysfunction criteria (RHI<1.67), which decreased to 27% (P=0.0006) at end point. The MTHFR 677C/C+COMT 158Met/Met group also showed significant reduction in those meeting endothelial dysfunction (83% baseline and 16% end point (P=0.001)). Global methylation levels increased after supplementation (4.3%, P<0.0001), with subjects receiving olanzapine or clozapine experiencing greater methylation changes after folate supplementation. Folate may reduce AAP-associated metabolic risks. Conclusions: We report significant reductions in the number of subjects meeting endothelial dysfunction. Given that all subjects met metabolic syndrome criteria, this may prove as a useful avenue to reducing cardiovascular disease risk. MTHFR and COMT genotypes may affect response and underlying changes in DNA methylation may help to explain the mechanistic underpinnings of these findings.
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Affiliation(s)
- Vicki L Ellingrod
- Department of Clinical Pharmacy, College of Pharmacy, University of Michigan, Ann Arbor, MI, USA; Department of Psychiatry, University of Michigan, Ann Arbor, MI, USA; Department of Psychology, University of Michigan, Ann Arbor, MI, USA
| | - Tyler B Grove
- Department of Psychology, University of Michigan , Ann Arbor, MI, USA
| | - Kyle J Burghardt
- Department of Pharmacy Practice, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University , Detroit, MI, USA
| | - Stephan F Taylor
- Department of Psychiatry, University of Michigan , Ann Arbor, MI, USA
| | - Gregory Dalack
- Department of Psychiatry, University of Michigan , Ann Arbor, MI, USA
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14
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Barnett MP, Bermingham EN, Young W, Bassett SA, Hesketh JE, Maciel-Dominguez A, McNabb WC, Roy NC. Low folate and selenium in the mouse maternal diet alters liver gene expression patterns in the offspring after weaning. Nutrients 2015; 7:3370-86. [PMID: 26007332 PMCID: PMC4446756 DOI: 10.3390/nu7053370] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 04/22/2015] [Accepted: 04/29/2015] [Indexed: 12/18/2022] Open
Abstract
During pregnancy, selenium (Se) and folate requirements increase, with deficiencies linked to neural tube defects (folate) and DNA oxidation (Se). This study investigated the effect of a high-fat diet either supplemented with (diet H), or marginally deficient in (diet L), Se and folate. Pregnant female mice and their male offspring were assigned to one of four treatments: diet H during gestation, lactation and post-weaning; diet L during gestation, lactation and post-weaning; diet H during gestation and lactation but diet L fed to offspring post-weaning; or diet L during gestation and lactation followed by diet H fed to offspring post-weaning. Microarray and pathway analyses were performed using RNA from colon and liver of 12-week-old male offspring. Gene set enrichment analysis of liver gene expression showed that diet L affected several pathways including regulation of translation (protein biosynthesis), methyl group metabolism, and fatty acid metabolism; this effect was stronger when the diet was fed to mothers, rather than to offspring. No significant differences in individual gene expression were observed in colon but there were significant differences in cell cycle control pathways. In conclusion, a maternal low Se/folate diet during gestation and lactation has more effects on gene expression in offspring than the same diet fed to offspring post-weaning; low Se and folate in utero and during lactation thus has persistent metabolic effects in the offspring.
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Affiliation(s)
- Matthew P.G. Barnett
- Food Nutrition & Health Team, Food & Bio-Based Products Group, AgResearch Limited, Grasslands Research Centre, Tennent Drive, Palmerston North 4442, New Zealand; E-Mails: (E.N.B.); (W.Y.); (S.A.B.); (N.C.R.)
- Nutrigenomics New Zealand; Private Bag 92019, Auckland 1142, New Zealand
- Gravida: National Centre for Growth and Development, Private Bag 92019, Auckland 1142, New Zealand
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +64-21-938-549; Fax: +64-6-351-8032
| | - Emma N. Bermingham
- Food Nutrition & Health Team, Food & Bio-Based Products Group, AgResearch Limited, Grasslands Research Centre, Tennent Drive, Palmerston North 4442, New Zealand; E-Mails: (E.N.B.); (W.Y.); (S.A.B.); (N.C.R.)
- Nutrigenomics New Zealand; Private Bag 92019, Auckland 1142, New Zealand
| | - Wayne Young
- Food Nutrition & Health Team, Food & Bio-Based Products Group, AgResearch Limited, Grasslands Research Centre, Tennent Drive, Palmerston North 4442, New Zealand; E-Mails: (E.N.B.); (W.Y.); (S.A.B.); (N.C.R.)
- Nutrigenomics New Zealand; Private Bag 92019, Auckland 1142, New Zealand
| | - Shalome A. Bassett
- Food Nutrition & Health Team, Food & Bio-Based Products Group, AgResearch Limited, Grasslands Research Centre, Tennent Drive, Palmerston North 4442, New Zealand; E-Mails: (E.N.B.); (W.Y.); (S.A.B.); (N.C.R.)
- Nutrigenomics New Zealand; Private Bag 92019, Auckland 1142, New Zealand
| | - John E. Hesketh
- Institute for Cell and Molecular Biosciences and Human Nutrition Research Centre, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK; E-Mails: (J.E.H.); (A.M.-D.)
| | - Anabel Maciel-Dominguez
- Institute for Cell and Molecular Biosciences and Human Nutrition Research Centre, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK; E-Mails: (J.E.H.); (A.M.-D.)
| | - Warren C. McNabb
- AgResearch Limited, Grasslands Research Centre, Tennent Drive, Palmerston North 4442, New Zealand; E-Mail:
- Riddet Institute, Massey University, Tennent Drive, Palmerston North 4442, New Zealand
| | - Nicole C. Roy
- Food Nutrition & Health Team, Food & Bio-Based Products Group, AgResearch Limited, Grasslands Research Centre, Tennent Drive, Palmerston North 4442, New Zealand; E-Mails: (E.N.B.); (W.Y.); (S.A.B.); (N.C.R.)
- Nutrigenomics New Zealand; Private Bag 92019, Auckland 1142, New Zealand
- Gravida: National Centre for Growth and Development, Private Bag 92019, Auckland 1142, New Zealand
- Riddet Institute, Massey University, Tennent Drive, Palmerston North 4442, New Zealand
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15
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Szarc vel Szic K, Declerck K, Vidaković M, Vanden Berghe W. From inflammaging to healthy aging by dietary lifestyle choices: is epigenetics the key to personalized nutrition? Clin Epigenetics 2015; 7:33. [PMID: 25861393 PMCID: PMC4389409 DOI: 10.1186/s13148-015-0068-2] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Accepted: 03/09/2015] [Indexed: 01/12/2023] Open
Abstract
The progressively older population in developed countries is reflected in an increase in the number of people suffering from age-related chronic inflammatory diseases such as metabolic syndrome, diabetes, heart and lung diseases, cancer, osteoporosis, arthritis, and dementia. The heterogeneity in biological aging, chronological age, and aging-associated disorders in humans have been ascribed to different genetic and environmental factors (i.e., diet, pollution, stress) that are closely linked to socioeconomic factors. The common denominator of these factors is the inflammatory response. Chronic low-grade systemic inflammation during physiological aging and immunosenescence are intertwined in the pathogenesis of premature aging also defined as ‘inflammaging.’ The latter has been associated with frailty, morbidity, and mortality in elderly subjects. However, it is unknown to what extent inflammaging or longevity is controlled by epigenetic events in early life. Today, human diet is believed to have a major influence on both the development and prevention of age-related diseases. Most plant-derived dietary phytochemicals and macro- and micronutrients modulate oxidative stress and inflammatory signaling and regulate metabolic pathways and bioenergetics that can be translated into stable epigenetic patterns of gene expression. Therefore, diet interventions designed for healthy aging have become a hot topic in nutritional epigenomic research. Increasing evidence has revealed that complex interactions between food components and histone modifications, DNA methylation, non-coding RNA expression, and chromatin remodeling factors influence the inflammaging phenotype and as such may protect or predispose an individual to many age-related diseases. Remarkably, humans present a broad range of responses to similar dietary challenges due to both genetic and epigenetic modulations of the expression of target proteins and key genes involved in the metabolism and distribution of the dietary constituents. Here, we will summarize the epigenetic actions of dietary components, including phytochemicals, and macro- and micronutrients as well as metabolites, that can attenuate inflammaging. We will discuss the challenges facing personalized nutrition to translate highly variable interindividual epigenetic diet responses to potential individual health benefits/risks related to aging disease.
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Affiliation(s)
- Katarzyna Szarc vel Szic
- Lab Protein Science, Proteomics and Epigenetic Signaling, Department of Biomedical Sciences, University Antwerp, Campus Drie Eiken, Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Ken Declerck
- Lab Protein Science, Proteomics and Epigenetic Signaling, Department of Biomedical Sciences, University Antwerp, Campus Drie Eiken, Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Melita Vidaković
- Department of Molecular Biology, Institute for Biological Research, University of Belgrade, Bulevar Despota Stefana 142, 11060 Belgrade, Serbia
| | - Wim Vanden Berghe
- Lab Protein Science, Proteomics and Epigenetic Signaling, Department of Biomedical Sciences, University Antwerp, Campus Drie Eiken, Universiteitsplein 1, 2610 Wilrijk, Belgium
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16
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Jablonska E, Vinceti M. Selenium and Human Health: Witnessing a Copernican Revolution? JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART C, ENVIRONMENTAL CARCINOGENESIS & ECOTOXICOLOGY REVIEWS 2015; 33:328-68. [PMID: 26074278 DOI: 10.1080/10590501.2015.1055163] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
In humans, selenium was hypothesized to lower the risk of several chronic diseases, mainly due to the antioxidant activity of selenium-containing proteins. Recent epidemiologic and laboratory studies, however, are changing our perception of the biological effects of this nutritionally essential trace element. We reviewed the most recent epidemiologic and biochemical literature on selenium, synthesizing the findings from these studies into a unifying view. Randomized trials have shown that selenium did not protect against cancer and other chronic diseases, but even increased the risk of specific neoplasms such as advanced prostate cancer and skin cancer, in addition to type 2 diabetes. Biochemical studies indicate that selenium may exert a broad pattern of toxic effects at unexpectedly low concentrations. Furthermore, its upregulation of antioxidant proteins (selenium-dependent and selenium-independent) may be a manifestation of self-induced oxidative stress. In conclusion, toxic effects of selenium species occur at lower concentrations than previously believed. Those effects may include a large range of proteomic changes and adverse health effects in humans. Since the effects of environmental exposure to this element on human health still remain partially unknown, but are potentially serious, the toxicity of selenium exposure should be further investigated and considered as a public health priority.
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Affiliation(s)
- Ewa Jablonska
- a Department of Toxicology and Carcinogenesis , Nofer Institute of Occupational Medicine , Lodz , Poland
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17
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Cordero P, Campion J, Milagro FI, Martinez JA. Transcriptomic and epigenetic changes in early liver steatosis associated to obesity: effect of dietary methyl donor supplementation. Mol Genet Metab 2013; 110:388-95. [PMID: 24084163 DOI: 10.1016/j.ymgme.2013.08.022] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2013] [Revised: 08/16/2013] [Accepted: 08/16/2013] [Indexed: 02/06/2023]
Abstract
Non-alcoholic fatty liver disease is a primary hepatic manifestation of obesity and an important adverse metabolic syndrome trait. Animal models of diet-induced obesity promote liver fat accumulation putatively associated with alterations in epigenetic profile. Dietary methyl donor-supplementation may protect against this disturbance during early developmental stages affecting the molecular basis of gene regulation. The aim of this study was to investigate the transcriptomic and epigenetic mechanisms implicated in liver fat accumulation as a result of an obesogenic diet and the putative preventive role of dietary methyl donors. Forty-eight male Wistar rats were assigned into four dietary groups for 8 weeks; control, control methyl-donor-supplemented with a dietary cocktail containing betaine, choline, vitamin B12 and folic acid, high-fat-sucrose and high-fat-sucrose methyl-donor-supplemented. Liver fat accumulation induced by a HFS diet was prevented by methyl donor supplementation in HFS-fed animals. A liver mRNA microarray, subsequently validated by real time-qPCR, showed modifications in some biologically relevant genes involved in obesity development and lipid metabolism (Lepr, Srebf2, Agpat3 and Esr1). Liver global DNA methylation was decreased by methyl donor supplementation in control-fed animals. Methylation levels of specific CpG sites from Srebf2, Agpat3 and Esr1 promoter regions showed changes due to the obesogenic diet and the supplementation with methyl donors. Interestingly, Srebf2 CpG23_24 methylation levels (-167 bp and -156 bp with respect to the transcriptional start site) correlated with HDLc plasma levels, whereas Esr1 CpG14 (-2623 bp) methylation levels were associated with body and liver weights and fat content. Furthermore HFS diet-induced liver fat accumulation was prevented by methyl donor supplementation. In conclusion, both obesogenic diet and methyl donor supplementation modified the mRNA hepatic profile as well as the methylation of specific gene promoters and total DNA.
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Affiliation(s)
- Paul Cordero
- Department of Nutrition, Food Sciences and Physiology, University of Navarra, Irunlarrea 1, 31008 Pamplona, Navarra, Spain.
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