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Zhao J, Li FZ, Wu J, Yang H, Zheng J, Pang J, Meng FX, Wang F, Zhang YL. Effect of CREB1 promoter non-CpG island methylation on its differential expression profile on sheep ovaries associated with prolificacy. Tissue Cell 2019; 58:61-69. [PMID: 31133247 DOI: 10.1016/j.tice.2019.04.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 04/02/2019] [Accepted: 04/15/2019] [Indexed: 12/01/2022]
Abstract
This study aimed to investigate the effect of different methylated regions of cyclic-AMP response element binding protein 1 (CREB1) by comparing the high prolificacy (HP) group and low prolificacy (LP) group, which was detected in our previous study. The expression level of CREB1 mRNA in the ovaries of the HP group was higher than in the LP group (P < 0.05). The differential methylated region (DMR) had 4 methylated CG dinucleotides(CGs): -1546, -1544, -1494 and -1464. The DNA methylation levels of -1546 CGs and -1464 CGs were significantly higher in the HP group than in the LP group (P < 0.05). The activity from -1296 to +26 (without DMR) was significantly higher than the activity from -1598 to +26 (with DMR) (P < 0.05). The result of 5-aza-2'-deoxycytidine treatment indicated that the inhibition DNA methylation of DMR reduced the transcription of CREB1. The bioinformatics predictive analysis were found that the -1546 CG site was located in the CCAAT/enhancer-binding protein alpha (CEBPA) binding site and the -1464 CG site was located in the Sp1 binding site. Finally, this study revealed the relationship between the methylation of non-CpG sites of the promoter and transcription of CREB1. This study will provide a theoretical basis of the Hu sheep ovaries associated with DNA methylation.
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Affiliation(s)
- Jie Zhao
- Jiangsu Livestock Embryo Engineering Laboratory, Nanjing Agricultural University, Nanjing, 210095, China
| | - Feng-Zhe Li
- Jiangsu Livestock Embryo Engineering Laboratory, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jie Wu
- Lang Fang Polytechnic Institute, Hebei, 065001, China
| | - Hua Yang
- Jiangsu Livestock Embryo Engineering Laboratory, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jian Zheng
- Jiangsu Livestock Embryo Engineering Laboratory, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jing Pang
- Jiangsu Livestock Embryo Engineering Laboratory, Nanjing Agricultural University, Nanjing, 210095, China
| | - Fan-Xing Meng
- National Experimental Teaching Demonstration Center of Animal Science, Nanjing Agricultural University, Nanjing, 210095, China
| | - Feng Wang
- Jiangsu Livestock Embryo Engineering Laboratory, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yan-Li Zhang
- Jiangsu Livestock Embryo Engineering Laboratory, Nanjing Agricultural University, Nanjing, 210095, China.
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2
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Pathak S, Miller J, Morris EC, Stewart WCL, Greenberg DA. DNA methylation of the BRD2 promoter is associated with juvenile myoclonic epilepsy in Caucasians. Epilepsia 2018; 59:1011-1019. [PMID: 29608786 DOI: 10.1111/epi.14058] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/22/2018] [Indexed: 12/24/2022]
Abstract
OBJECTIVE Juvenile myoclonic epilepsy (JME) is a common adolescent-onset genetic generalized epilepsy (GGE) syndrome. Multiple linkage and association studies have found that BRD2 influences the expression of JME. The BRD2-JME connection is further corroborated by our murine model; Brd2 haploinsufficiency produces characteristics that typify the clinical hallmarks of JME. Neither we, nor several large-scale studies of JME, found JME-related BRD2 coding mutations. Therefore, we investigated noncoding BRD2 regions, seeking the origin of BRD2's JME influence. BRD2's promoter harbors a JME-associated single nucleotide polymorphism (rs3918149) and a CpG (C-phosphate-G dinucleotides) island (CpG76), making it a potential "hotspot" for JME-associated epigenetic variants. Methylating promoter CpG sites causes gene silencing, often resulting in reduced gene expression. We tested for differences in DNA methylation at CpG76 in 3 different subgroups: (1) JME patients versus their unaffected family members, (2) JME versus patients with other forms of GGE, and (3) Caucasian versus non-Caucasian JME patients. METHODS We used DNA pyrosequencing to analyze the methylation status of 10 BRD2 promoter CpG sites in lymphoblastoid cells from JME patients of Caucasian and non-Caucasian origin, unaffected family members, and also non-JME GGE patients. We also measured global methylation levels and DNA methyl transferase 1 (DNMT1) transcript expression in JME families by standard methods. RESULTS CpG76 is highly methylated in JME patients compared to unaffected family members. In families with non-JME GGE, we found no relationship between promoter methylation and epilepsy. In non-Caucasian JME families, promoter methylation was mostly not associated with epilepsy. This makes the BRD2 promoter a JME-specific, ethnicity-specific, differentially methylated region. Global methylation was constant across groups. SIGNIFICANCE BRD2 promoter methylation in JME, and the lack of methylation in unaffected relatives, in non-JME GGE patients, and in non-Caucasian JME, demonstrate that methylation specificity is a possible seizure susceptibility motif in JME risk and suggests JME therapeutics targeting BRD2.
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Affiliation(s)
- Shilpa Pathak
- Battelle Center for Mathematical Medicine, Research Institute, Nationwide Children's Hospital, Columbus, OH, USA
| | - James Miller
- Battelle Center for Mathematical Medicine, Research Institute, Nationwide Children's Hospital, Columbus, OH, USA
| | - Emily C Morris
- Battelle Center for Mathematical Medicine, Research Institute, Nationwide Children's Hospital, Columbus, OH, USA
| | - William C L Stewart
- Battelle Center for Mathematical Medicine, Research Institute, Nationwide Children's Hospital, Columbus, OH, USA
| | - David A Greenberg
- Battelle Center for Mathematical Medicine, Research Institute, Nationwide Children's Hospital, Columbus, OH, USA
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3
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García-Escobar E, Monastero R, García-Serrano S, Gómez-Zumaquero JM, Lago-Sampedro A, Rubio-Martín E, Colomo N, Rodríguez-Pacheco F, Soriguer F, Rojo-Martínez G. Dietary fatty acids modulate adipocyte TNFa production via regulation of its DNA promoter methylation levels. J Nutr Biochem 2017; 47:106-112. [PMID: 28575756 DOI: 10.1016/j.jnutbio.2017.05.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 04/24/2017] [Accepted: 05/16/2017] [Indexed: 12/17/2022]
Abstract
The factors regulating TNF alpha (TNFa) levels could be considered therapeutic targets against metabolic syndrome development. DNA methylation is a potent regulator of gene expression and may be associated with protein levels. In this study we investigate whether the effect of dietary fatty acids on TNFa released from adipocytes might be associated with modifications of the TNFa promoter DNA methylation status. A group of rats was assigned to three diets with a different composition of saturated, monounsaturated and polyunsaturated fatty acids. Samples of visceral adipose tissues were taken for adipocyte isolation, in which released TNFa levels were measured, and for methylation and expression studies. In addition, 3 T3-L1 cells were treated with palmitic, oleic and linoleic acids, with and without 5-Azacitydine (5-AZA). After treatments, cells and supernatants were included in the same analyses as rat samples. TNFa promoter methylation levels, gene expression and secretion were different according to the diets and fatty acid treatments associated with them. Cells treated with 5-AZA displayed higher TNFa levels than in the absence of 5-AZA, without differences between fatty acids. According to our results, dietary fatty acid regulation of adipocyte TNFa levels may be mediated by epigenetic modifications of the TNFa promoter DNA methylation levels.
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Affiliation(s)
- Eva García-Escobar
- UGC Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Regional de Malaga, Malaga, Spain; CIBER of the Instituto de Salud Carlos III (CIBERDEM CB07/08/0019), Málaga, Spain.
| | - Roberto Monastero
- UGC Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Regional de Malaga, Malaga, Spain
| | - Sara García-Serrano
- UGC Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Regional de Malaga, Malaga, Spain; CIBER of the Instituto de Salud Carlos III (CIBERDEM CB07/08/0019), Málaga, Spain
| | - Juan M Gómez-Zumaquero
- CIBER of the Instituto de Salud Carlos III (CIBERDEM CB07/08/0019), Málaga, Spain; ECAI de Genomica del Instituto de Investigación Biomédica de Málaga (IBIMA), Málaga, Spain
| | - Ana Lago-Sampedro
- UGC Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Regional de Malaga, Malaga, Spain; CIBER of the Instituto de Salud Carlos III (CIBERDEM CB07/08/0019), Málaga, Spain
| | - Elehazara Rubio-Martín
- UGC Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Regional de Malaga, Malaga, Spain; CIBER of the Instituto de Salud Carlos III (CIBERDEM CB07/08/0019), Málaga, Spain
| | - Natalia Colomo
- UGC Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Regional de Malaga, Malaga, Spain; CIBER of the Instituto de Salud Carlos III (CIBERDEM CB07/08/0019), Málaga, Spain
| | - Francisca Rodríguez-Pacheco
- UGC Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Regional de Malaga, Malaga, Spain
| | - Federico Soriguer
- UGC Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Regional de Malaga, Malaga, Spain; CIBER of the Instituto de Salud Carlos III (CIBERDEM CB07/08/0019), Málaga, Spain
| | - Gemma Rojo-Martínez
- UGC Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Regional de Malaga, Malaga, Spain; CIBER of the Instituto de Salud Carlos III (CIBERDEM CB07/08/0019), Málaga, Spain
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Broholm C, Olsson AH, Perfilyev A, Gillberg L, Hansen NS, Ali A, Mortensen B, Ling C, Vaag A. Human adipogenesis is associated with genome-wide DNA methylation and gene-expression changes. Epigenomics 2016; 8:1601-1617. [PMID: 27854126 DOI: 10.2217/epi-2016-0077] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
AIM To define the genomic distribution and function of DNA methylation changes during human adipogenesis. METHODS We isolated adipocyte-derived stem cells from 13 individuals and analyzed genome-wide DNA methylation and gene expression in cultured adipocyte-derived stem cells and mature adipocytes. RESULTS We observed altered DNA methylation of 11,947 CpG sites and altered expression of 11,830 transcripts after differentiation. De novo methylation was observed across all genomic elements. Co-existence of genes with both altered expression and DNA methylation was found in genes important for cell cycle and adipokine signaling. CONCLUSION Human adipogenesis is associated with significant DNA methylation changes across the entire genome and may impact regulation of cell cycle and adipokine signaling.
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Affiliation(s)
- Christa Broholm
- Department of Endocrinology, Diabetes & Metabolism, Rigshospitalet, Copenhagen, Denmark
| | - Anders Henrik Olsson
- Department of Endocrinology, Diabetes & Metabolism, Rigshospitalet, Copenhagen, Denmark
| | - Alexander Perfilyev
- Department of Clinical Sciences, Epigenetics & Diabetes Unit, Lund University Diabetes Centre, CRC, Malmö, Sweden
| | - Linn Gillberg
- Department of Endocrinology, Diabetes & Metabolism, Rigshospitalet, Copenhagen, Denmark
| | - Ninna Schiøler Hansen
- Department of Endocrinology, Diabetes & Metabolism, Rigshospitalet, Copenhagen, Denmark.,Faculty of Health & Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Ashfaq Ali
- Department of Clinical Sciences, GAME, Lund University Diabetes Centre, CRC, Malmö, Sweden
| | | | - Charlotte Ling
- Department of Clinical Sciences, Epigenetics & Diabetes Unit, Lund University Diabetes Centre, CRC, Malmö, Sweden
| | - Allan Vaag
- Department of Endocrinology, Diabetes & Metabolism, Rigshospitalet, Copenhagen, Denmark.,Faculty of Health & Medical Sciences, University of Copenhagen, Copenhagen, Denmark.,Steno Diabetes Centre A/S, Gentofte, Denmark
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Sun R, Wu Y, Hou W, Sun Z, Wang Y, Wei H, Mo W, Yu M. Bromodomain-containing protein 2 induces insulin resistance via the mTOR/Akt signaling pathway and an inflammatory response in adipose tissue. Cell Signal 2016; 30:92-103. [PMID: 27865874 DOI: 10.1016/j.cellsig.2016.11.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2016] [Revised: 11/10/2016] [Accepted: 11/15/2016] [Indexed: 01/02/2023]
Abstract
Insulin resistance is a major metabolic abnormality in a large majority of patients with type II diabetes. Bromodomain-containing protein 2 (Brd2), a transcriptional co-activator/co-repressor with switch mating type/sucrose non-fermenting (SWI/SNF)-like functions that regulates chromatin, suppresses adipocyte differentiation and regulates pancreatic β-cell biology. However, the effects of Brd2 on insulin resistance remain unknown. Here, overexpression of Brd2 in white adipose tissue of wild-type (WT) mice led to insulin resistance. Brd2 overexpression induced the expression of nuclear Factor-κΒ (NF-κΒ) target genes, mainly involving proinflammatory and chemotactic factors, in adipocytes. Furthermore, it decreased the expression of DEP domain containing mTOR-interacting protein (Deptor) to enhance mechanistic target of rapamycin (mTOR) signaling, thus blocking insulin signaling. Collectively, these results provided evidence for a novel role of Brd2 in chronic inflammation and insulin resistance, suggesting its potential in improving insulin resistance and treating metabolic disorders.
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Affiliation(s)
- Ruixin Sun
- The Key Laboratory of Metabolism and Molecular Medicine, The Ministry of Education, Department of Biochemistry and Molecular Biology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Yi Wu
- The Key Laboratory of Metabolism and Molecular Medicine, The Ministry of Education, Department of Biochemistry and Molecular Biology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Weihua Hou
- The Key Laboratory of Metabolism and Molecular Medicine, The Ministry of Education, Department of Biochemistry and Molecular Biology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Zujun Sun
- The Key Laboratory of Metabolism and Molecular Medicine, The Ministry of Education, Department of Biochemistry and Molecular Biology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Yuxiong Wang
- The Key Laboratory of Metabolism and Molecular Medicine, The Ministry of Education, Department of Biochemistry and Molecular Biology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Huanhuan Wei
- The Key Laboratory of Metabolism and Molecular Medicine, The Ministry of Education, Department of Biochemistry and Molecular Biology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Wei Mo
- The Key Laboratory of Metabolism and Molecular Medicine, The Ministry of Education, Department of Biochemistry and Molecular Biology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Min Yu
- The Key Laboratory of Metabolism and Molecular Medicine, The Ministry of Education, Department of Biochemistry and Molecular Biology, Shanghai Medical College, Fudan University, Shanghai 200032, China.
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6
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Ambati S, Yu P, McKinney EC, Kandasamy MK, Hartzell D, Baile CA, Meagher RB. Adipocyte nuclei captured from VAT and SAT. BMC OBESITY 2016; 3:35. [PMID: 27462403 PMCID: PMC4949929 DOI: 10.1186/s40608-016-0112-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 06/16/2016] [Indexed: 12/11/2022]
Abstract
Background Obesity-related comorbidities are thought to result from the reprogramming of the epigenome in numerous tissues and cell types, and in particular, mature adipocytes within visceral and subcutaneous adipose tissue, VAT and SAT. The cell-type specific chromatin remodeling of mature adipocytes within VAT and SAT is poorly understood, in part, because of the difficulties of isolating and manipulating large fragile mature adipocyte cells from adipose tissues. Methods We constructed MA-INTACT (Mature Adipocyte-Isolation of Nuclei TAgged in specific Cell Types) mice using the adiponectin (ADIPOQ) promoter (ADNp) to tag the surface of mature adipocyte nuclei with a reporter protein. The SUN1mRFP1Flag reporter is comprised of a fragment of the nuclear transmembrane protein SUN1, the fluorescent protein mRFP1, and three copies of the Flag epitope tag. Results Mature adipocyte nuclei were rapidly and efficiently immuno-captured from VAT and SAT (MVA and MSA nuclei, respectively), of MA-INTACT mice. MVA and MSA nuclei contained 1,000 to 10,000-fold higher levels of adipocyte-specific transcripts, ADIPOQ, PPARg2, EDNRB, and LEP, relative to uncaptured nuclei, while the latter expressed higher levels of leukocyte and endothelial cell markers IKZF1, RETN, SERPINF1, SERPINE1, ILF3, and TNFA. MVA and MSA nuclei differentially expressed several factors linked to adipogenesis or obesity-related health risks including CEBPA, KLF2, RETN, SERPINE1, and TNFA. The various nuclear populations dramatically differentially expressed transcripts encoding chromatin remodeler proteins regulating DNA cytosine methylation and hydroxymethylation (TETs, DNMTs, TDG, GADD45s) and nucleosomal histone modification (ARID1A, KAT2B, KDM4A, PRMT1, PRMT5, PAXIP1). Remarkably, MSA and MVA nuclei expressed 200 to 1000-fold higher levels of thermogenic marker transcripts PRDM16 and UCP1. Conclusions The MA-INTACT mouse enables a simple way to perform cell-type specific analysis of highly purified mature adipocyte nuclei from VAT and SAT and increases the statistical significance of data collected on adipocytes. Isolated VAT and SAT adipocyte nuclei expressed distinct patterns of transcripts encoding chromatin remodeling factors and proteins relevant to diabetes, cardiovascular disease, and thermogenesis. The MA-INTACT mouse is an useful model to test the impact of caloric intake, dietary nutrients, exercise, and pharmaceuticals on the epigenome-induced health risks of obesity. Electronic supplementary material The online version of this article (doi:10.1186/s40608-016-0112-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Suresh Ambati
- Department of Genetics, University of Georgia, Athens, GA USA
| | - Ping Yu
- Department of Genetics, University of Georgia, Athens, GA USA
| | | | | | - Diane Hartzell
- Department of Foods and Nutrition, University of Georgia, Athens, GA USA ; Department of Animal and Dairy Science, University of Georgia, Athens, GA USA
| | - Clifton A Baile
- Department of Foods and Nutrition, University of Georgia, Athens, GA USA ; Department of Animal and Dairy Science, University of Georgia, Athens, GA USA
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van den Dungen MW, Murk AJ, Kok DE, Steegenga WT. Comprehensive DNA Methylation and Gene Expression Profiling in Differentiating Human Adipocytes. J Cell Biochem 2016; 117:2707-2718. [PMID: 27061314 DOI: 10.1002/jcb.25568] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Accepted: 04/05/2016] [Indexed: 01/09/2023]
Abstract
Insight into the processes controlling adipogenesis is important in the battle against the obesity epidemic and its related disorders. The transcriptional regulatory cascade involved in adipocyte differentiation has been extensively studied, however, the mechanisms driving the transcription activation are still poorly understood. In this study, we explored the involvement of DNA methylation in transcriptional regulation during adipocyte differentiation of primary human mesenchymal stem cells (hMSCs). Genome-wide changes in DNA methylation were measured using the Illumina 450K BeadChip. In addition, expression of 84 adipogenic genes was determined, of which 43 genes showed significant expression changes during the differentiation process. Among these 43 differentially expressed genes, differentially methylated regions (DMRs) were detected in only three genes. By comparing genome-wide DNA methylation profiles in undifferentiated and differentiated adipocytes 793 significant DMRs were detected. Pathway analysis revealed the adipogenesis pathway as the most statistically significant, although only a small number of genes were differentially methylated. Genome-wide DNA methylation changes for single probes were most often located in intergenic regions, and underrepresented close to the transcription start site. In conclusion, DNA methylation remained relatively stable during adipocyte differentiation, implying that changes in DNA methylation are not the underlying mechanism regulating gene expression during adipocyte differentiation. J. Cell. Biochem. 117: 2707-2718, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Myrthe W van den Dungen
- Sub-Department of Environmental Technology, Wageningen University, P.O. Box 17, 6700 AA, Wageningen, The Netherlands.,Division of Human Nutrition, Wageningen University, P.O. Box 8129, 6700 EV, Wageningen, The Netherlands
| | - Albertinka J Murk
- Sub-Department of Environmental Technology, Wageningen University, P.O. Box 17, 6700 AA, Wageningen, The Netherlands.,Marine Animal Ecology Group, Wageningen University, P.O. Box 338, 6700 AH, Wageningen, The Netherlands
| | - Dieuwertje E Kok
- Sub-Department of Environmental Technology, Wageningen University, P.O. Box 17, 6700 AA, Wageningen, The Netherlands
| | - Wilma T Steegenga
- Sub-Department of Environmental Technology, Wageningen University, P.O. Box 17, 6700 AA, Wageningen, The Netherlands.
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Houde AA, Ruchat SM, Allard C, Baillargeon JP, St-Pierre J, Perron P, Gaudet D, Brisson D, Hivert MF, Bouchard L. LRP1B, BRD2 and CACNA1D: new candidate genes in fetal metabolic programming of newborns exposed to maternal hyperglycemia. Epigenomics 2015; 7:1111-22. [PMID: 26586120 DOI: 10.2217/epi.15.72] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
AIM To assess the associations between gestational diabetes mellitus (GDM) and DNA methylation levels at genes related to energy metabolism. PATIENTS & METHODS Ten loci were selected from our recent epigenome-wide association study on GDM. DNA methylation levels were quantified by bisulfite pyrosequencing in 80 placenta and cord blood samples (20 exposed to GDM) from an independent birth cohort (Gen3G). RESULTS We did not replicate association between DNA methylation and GDM. However, in normoglycemic women, glucose levels were associated with DNA methylation changes at LRP1B and BRD2 and at CACNA1D and LRP1B gene loci in placenta and cord blood, respectively. CONCLUSION These results suggest that maternal glucose levels, within the normal range, are associated with DNA methylation changes at genes related to energy metabolism and previously associated with GDM. Maternal glycemia might thus be involved in fetal metabolic programming.
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Affiliation(s)
- Andrée-Anne Houde
- Department of Biochemistry, Université de Sherbrooke, Sherbrooke, QC, Canada.,ECOGENE-21 & Clinical Research Center & Lipid Clinic, Chicoutimi Hospital, Saguenay, QC, Canada
| | - Stephanie-May Ruchat
- Department of Biochemistry, Université de Sherbrooke, Sherbrooke, QC, Canada.,ECOGENE-21 & Clinical Research Center & Lipid Clinic, Chicoutimi Hospital, Saguenay, QC, Canada
| | - Catherine Allard
- Department of Medicine, Division of Endocrinology, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Jean-Patrice Baillargeon
- Department of Medicine, Division of Endocrinology, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Julie St-Pierre
- ECOGENE-21 & Clinical Research Center & Lipid Clinic, Chicoutimi Hospital, Saguenay, QC, Canada.,Department of Pediatrics, Chicoutimi Hospital, Saguenay, QC, Canada.,Department of Health Sciences, Université du Québec à Chicoutimi, Saguenay, QC, Canada
| | - Patrice Perron
- ECOGENE-21 & Clinical Research Center & Lipid Clinic, Chicoutimi Hospital, Saguenay, QC, Canada.,Department of Medicine, Division of Endocrinology, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Daniel Gaudet
- ECOGENE-21 & Clinical Research Center & Lipid Clinic, Chicoutimi Hospital, Saguenay, QC, Canada.,Department of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Diane Brisson
- ECOGENE-21 & Clinical Research Center & Lipid Clinic, Chicoutimi Hospital, Saguenay, QC, Canada.,Department of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Marie-France Hivert
- Department of Medicine, Division of Endocrinology, Université de Sherbrooke, Sherbrooke, QC, Canada.,Department of Population Medicine, Harvard Pilgrim Health Care Institute, Boston, MA, USA.,General Medicine Division, Massachusetts General Hospital, Boston, MA, USA
| | - Luigi Bouchard
- Department of Biochemistry, Université de Sherbrooke, Sherbrooke, QC, Canada.,ECOGENE-21 & Clinical Research Center & Lipid Clinic, Chicoutimi Hospital, Saguenay, QC, Canada
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