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M N N, J K, S R S, Raavi V. Methylation Status of IGF-Axis Genes in the Placenta of South Indian Neonates with Appropriate and Small for Gestational Age. Fetal Pediatr Pathol 2024; 43:5-20. [PMID: 37975569 DOI: 10.1080/15513815.2023.2280660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 11/01/2023] [Indexed: 11/19/2023]
Abstract
OBJECTIVE Altered methylation patterns of insulin-like growth factor (IGF)-axis genes in small for gestational age (SGA) have been reported in different populations. In the present study, we analyzed the methylation status of IGF-axis genes in the placenta of appropriate for gestational age (AGA) and SGA neonates of South Indian women. METHODS Placental samples were collected from AGA (n = 40) and SAG (n = 40) neonates. The methylation of IGF-axis genes promoter was analyzed using MS-PCR. RESULTS IGF2, H19, IGF1, and IGFR1 genes promoter methylation was 2.5, 1.5, 5, and 7.5% lower in SGA compared to AGA, respectively. Co-methylation of IGF-axis genes promoter was 40% and 20% in AGA and SGA, respectively. IGF-axis gene promoter methylation significantly (p < 0.05) influenced the levels of IGFBP3 protein, birth weight, mitotic index, gestational weeks, and IGFR1 and IGFR2 gene expression. CONCLUSION IGF-axis genes methylation was lower in SGA than in AGA, and the methylation significantly influenced the IGF-axis components.
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Affiliation(s)
- Nithya M N
- Department of Cell Biology and Molecular Genetics, Sri Devaraj Urs Academy of Higher Education and Research (Deemed to be University), Kolar, Karnataka, India
| | - Krishnappa J
- Department of Paediatrics, Sri Devaraj Urs Medical College, Sri Devaraj Urs Academy of Higher Education and Research (Deemed to be University), Kolar, Karnataka, India
| | - Sheela S R
- Department of Obstetrics and Gynaecology, Sri Devaraj Urs Medical College, Sri Devaraj Urs Academy of Higher Education and Research (Deemed to be University), Kolar, Karnataka, India
| | - Venkateswarlu Raavi
- Department of Cell Biology and Molecular Genetics, Sri Devaraj Urs Academy of Higher Education and Research (Deemed to be University), Kolar, Karnataka, India
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El-Sayed EH, Fathy A, Al-Deen Younes SE, Al-Shahaly MH, Omar HH. Long Non-coding RNA Genes Polymorphisms H19 (rs2251375) and MALAT1 (rs3200401) Association with Rheumatoid Arthritis and Their Correlation with Disease Activity in a Cohort of Egyptian Patients: A Pilot Study. Biochem Genet 2023; 61:2443-2456. [PMID: 37103602 DOI: 10.1007/s10528-023-10383-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 04/12/2023] [Indexed: 04/28/2023]
Abstract
Rheumatoid arthritis (RA) is a chronic, progressive, inflammatory, autoimmune disease that could be disabling throughout its course. It affects people in their most reproductive years with relatively high morbidity and mortality. Long non-coding RNAs became one of the epigenetic mechanisms to prove a link to RA pathogenesis and development, including H19 and MALAT1 genes. These two genes' expressions had proved to increase in multiple diseases, attracting attention to their polymorphisms and their possible risk role. Assess the association between H19 SNP (rs2251375) and MALAT1 SNP (rs3200401) and the susceptibility of RA and its disease activity. In this pilot study, 200 hundred subjects (100 RA patients and 100 healthy controls) were investigated for a possible link between the polymorphisms H19 SNP (rs2251375) and MALAT1 SNP (3200401) and RA susceptibility and disease activity. RA-related investigations and clinical assessment were done. Real-time PCR genotyping of both SNPs was done using TaqMan® MGB probes. There was no association between the SNPs and risk of developing RA. However, both SNPs had a significant association with high disease activity. H19 SNP (rs2251375) heterozygous genotype CA had an association with elevated levels of ESR (p = 0.04) and higher DAS28-ESR score (p = 0.03). MALAT1 (rs3200401) C allele had an association with elevated ESR (p = 0.001), DAS28-ESR (p = 0.03), and DAS28-CRP (p = 0.007), while CC genotype had an association with DAS28-CRP (p = 0.015). Linkage disequilibrium and haplotyping of the alleles of both SNPs were analyzed as both genes are present on chromosome 11, but no significant association was found between any of the combinations of the alleles (p > 0.05), denoting that (rs2251375) and (rs3200401) are not in linkage disequilibrium. There is no association between H19 SNP (rs2251375) and MALAT1 SNP (rs3200401) and the susceptibility of RA. However, there is an association between H19 SNP (rs2251375) genotype CA and MALAT1 SNP (rs3200401) genotype CC with RA high disease activity.
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Affiliation(s)
- Eman Hassan El-Sayed
- Clinical Pathology Department, Faculty of Medicine, Suez Canal University, 4.5 km Ring Road, P.O: 41111, Ismailia, Egypt
| | - Amal Fathy
- Clinical Pathology Department, Faculty of Medicine, Suez Canal University, 4.5 km Ring Road, P.O: 41111, Ismailia, Egypt
| | - Soha Ezz Al-Deen Younes
- Clinical Pathology Department, Faculty of Medicine, Suez Canal University, 4.5 km Ring Road, P.O: 41111, Ismailia, Egypt
| | - Mohsen Hassan Al-Shahaly
- Rheumatology, Physical Medicine and Rehabilitation Department, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Hanan Hassan Omar
- Clinical Pathology Department, Faculty of Medicine, Suez Canal University, 4.5 km Ring Road, P.O: 41111, Ismailia, Egypt.
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Coppens G, Vanhorebeek I, Verlinden I, Derese I, Wouters PJ, Joosten KF, Verbruggen SC, Güiza F, Van den Berghe G. Assessment of aberrant DNA methylation two years after paediatric critical illness: a pre-planned secondary analysis of the international PEPaNIC trial. Epigenetics 2023; 18:2146966. [PMID: 36384393 PMCID: PMC9980627 DOI: 10.1080/15592294.2022.2146966] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Critically ill children requiring intensive care suffer from impaired physical/neurocognitive development 2 y later, partially preventable by omitting early use of parenteral nutrition (early-PN) in the paediatric intensive-care-unit (PICU). Altered methylation of DNA from peripheral blood during PICU-stay provided a molecular basis hereof. Whether DNA-methylation of former PICU patients, assessed 2 y after critical illness, is different from that of healthy children remained unknown. In a pre-planned secondary analysis of the PEPaNIC-RCT (clinicaltrials.gov-NCT01536275) 2-year follow-up, we assessed buccal-mucosal DNA-methylation (Infinium-HumanMethylation-EPIC-BeadChip) of former PICU-patients (N = 406 early-PN; N = 414 late-PN) and matched healthy children (N = 392). CpG-sites differentially methylated between groups were identified with multivariable linear regression and differentially methylated DNA-regions via clustering of differentially methylated CpG-sites using kernel-estimates. Analyses were adjusted for technical variation and baseline risk factors, and corrected for multiple testing (false-discovery-rate <0.05). Differentially methylated genes were functionally annotated (KEGG-pathway database), and allocated to three classes depending on involvement in physical/neurocognitive development, critical illness and intensive medical care, or pre-PICU-admission disorders. As compared with matched healthy children, former PICU-patients showed significantly different DNA-methylation at 4047 CpG-sites (2186 genes) and 494 DNA-regions (468 genes), with most CpG-sites being hypomethylated (90.3%) and with an average absolute 2% effect-size, irrespective of timing of PN initiation. Of the differentially methylated KEGG-pathways, 41.2% were related to physical/neurocognitive development, 32.8% to critical illness and intensive medical care and 26.0% to pre-PICU-admission disorders. Two years after critical illness in children, buccal-mucosal DNA showed abnormal methylation of CpG-sites and DNA-regions located in pathways known to be important for physical/neurocognitive development.
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Affiliation(s)
- Grégoire Coppens
- Clinical Division and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven,Leuven, Belgium
| | - Ilse Vanhorebeek
- Clinical Division and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven,Leuven, Belgium
| | - Ines Verlinden
- Clinical Division and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven,Leuven, Belgium
| | - Inge Derese
- Clinical Division and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven,Leuven, Belgium
| | - Pieter J Wouters
- Clinical Division and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven,Leuven, Belgium
| | - Koen F Joosten
- Intensive Care Unit, Department of Paediatrics and Paediatric Surgery, Erasmus Medical Centre, Sophia Children's Hospital, Rotterdam, The Netherlands
| | - Sascha C Verbruggen
- Intensive Care Unit, Department of Paediatrics and Paediatric Surgery, Erasmus Medical Centre, Sophia Children's Hospital, Rotterdam, The Netherlands
| | - Fabian Güiza
- Clinical Division and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven,Leuven, Belgium
| | - Greet Van den Berghe
- Clinical Division and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven,Leuven, Belgium
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Argentato PP, Marchesi JAP, Dejani NN, Nakandakare PY, Teles LDFDS, Batista LPR, Leitão MPC, Luzia LA, Ramos ES, Rondó PH. The relationship between obesity-related H19DMR methylation and H19 and IGF2 gene expression on offspring growth and body composition. Front Nutr 2023; 10:1170411. [PMID: 37810933 PMCID: PMC10552537 DOI: 10.3389/fnut.2023.1170411] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 09/04/2023] [Indexed: 10/10/2023] Open
Abstract
Background and objective Imprinted genes are important for the offspring development. To assess the relationship between obesity-related H19DMR methylation and H19 and IGF2 gene expression and offspring growth and body composition. Methods Thirty-nine overweight/obese and 25 normal weight pregnant women were selected from the "Araraquara Cohort Study" according to their pre-pregnancy BMI. Fetal growth and body composition and newborn growth were assessed, respectively, by ultrasound and anthropometry. The methylation of H19DMR in maternal blood, cord blood, maternal decidua and placental villi tissues was evaluated by methylation-sensitive restriction endonuclease qPCR, and H19 and IGF2 expression by relative real-time PCR quantification. Multiple linear regression models explored the associations of DNA methylation and gene expression with maternal, fetal, and newborn parameters. Results H19DMR was less methylated in maternal blood of the overweight/obese group. There were associations of H19DMR methylation in cord blood with centiles of fetal biparietal diameter (BPD) and abdominal subcutaneous fat thickness and newborn head circumference (HC); H19DMR methylation in maternal decidua with fetal occipitofrontal diameter (OFD), HC, and length; H19DMR methylation in placental villi with fetal OFD, HC and abdominal subcutaneous fat thickness and with newborn HC. H19 expression in maternal decidua was associated with fetal BPD and femur length centiles and in placental villi with fetal OFD and subcutaneous arm fat. IGF2 expression in maternal decidua was associated with fetal BPD and in placental villi with fetal OFD. Conclusion To our knowledge, this is the first study to demonstrate associations of imprinted genes variations at the maternal-fetal interface of the placenta and in cord blood with fetal body composition, supporting the involvement of epigenetic mechanisms in offspring growth and body composition.
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Affiliation(s)
- Perla Pizzi Argentato
- Nutrition Department, School of Public Health, University of São Paulo, São Paulo, Brazil
| | | | - Naiara Naiana Dejani
- Nutrition Department, School of Public Health, University of São Paulo, São Paulo, Brazil
| | | | | | | | | | - Liania Alves Luzia
- Nutrition Department, School of Public Health, University of São Paulo, São Paulo, Brazil
| | - Ester Silveira Ramos
- Department of Genetics, Ribeirão Preto Medical School, University of São Paulo, São Paulo, Brazil
| | - Patricia Helen Rondó
- Nutrition Department, School of Public Health, University of São Paulo, São Paulo, Brazil
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5
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Alfano R, Zugna D, Barros H, Bustamante M, Chatzi L, Ghantous A, Herceg Z, Keski-Rahkonen P, de Kok TM, Nawrot TS, Relton CL, Robinson O, Roumeliotaki T, Scalbert A, Vrijheid M, Vineis P, Richiardi L, Plusquin M. Cord blood epigenome-wide meta-analysis in six European-based child cohorts identifies signatures linked to rapid weight growth. BMC Med 2023; 21:17. [PMID: 36627699 PMCID: PMC9831885 DOI: 10.1186/s12916-022-02685-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 11/29/2022] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND Rapid postnatal growth may result from exposure in utero or early life to adverse conditions and has been associated with diseases later in life and, in particular, with childhood obesity. DNA methylation, interfacing early-life exposures and subsequent diseases, is a possible mechanism underlying early-life programming. METHODS Here, a meta-analysis of Illumina HumanMethylation 450K/EPIC-array associations of cord blood DNA methylation at single CpG sites and CpG genomic regions with rapid weight growth at 1 year of age (defined with reference to WHO growth charts) was conducted in six European-based child cohorts (ALSPAC, ENVIRONAGE, Generation XXI, INMA, Piccolipiù, and RHEA, N = 2003). The association of gestational age acceleration (calculated using the Bohlin epigenetic clock) with rapid weight growth was also explored via meta-analysis. Follow-up analyses of identified DNA methylation signals included prediction of rapid weight growth, mediation of the effect of conventional risk factors on rapid weight growth, integration with transcriptomics and metabolomics, association with overweight in childhood (between 4 and 8 years), and comparison with previous findings. RESULTS Forty-seven CpGs were associated with rapid weight growth at suggestive p-value <1e-05 and, among them, three CpGs (cg14459032, cg25953130 annotated to ARID5B, and cg00049440 annotated to KLF9) passed the genome-wide significance level (p-value <1.25e-07). Sixteen differentially methylated regions (DMRs) were identified as associated with rapid weight growth at false discovery rate (FDR)-adjusted/Siddak p-values < 0.01. Gestational age acceleration was associated with decreasing risk of rapid weight growth (p-value = 9.75e-04). Identified DNA methylation signals slightly increased the prediction of rapid weight growth in addition to conventional risk factors. Among the identified signals, three CpGs partially mediated the effect of gestational age on rapid weight growth. Both CpGs (N=3) and DMRs (N=3) were associated with differential expression of transcripts (N=10 and 7, respectively), including long non-coding RNAs. An AURKC DMR was associated with childhood overweight. We observed enrichment of CpGs previously reported associated with birthweight. CONCLUSIONS Our findings provide evidence of the association between cord blood DNA methylation and rapid weight growth and suggest links with prenatal exposures and association with childhood obesity providing opportunities for early prevention.
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Affiliation(s)
- Rossella Alfano
- Medical Research Council Centre for Environment and Health, Department of Epidemiology and Biostatistics, The School of Public Health, Imperial College London, London, UK
- Centre for Environmental Sciences, Hasselt University, Agoralaan Building D, 3590, Diepenbeek, Belgium
| | - Daniela Zugna
- Department of Medical Sciences, University of Turin and CPO-Piemonte, Turin, Italy
| | - Henrique Barros
- Institute of Public Health, University of Porto, Porto, Portugal
| | - Mariona Bustamante
- ISGlobal, Institute of Global Health, Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiología y Salud Pública, Madrid, Spain
| | - Leda Chatzi
- Department of Preventive Medicine, University of Southern California, Los Angeles, USA
| | - Akram Ghantous
- International Agency for Research on Cancer (IARC), 150 Cours Albert Thomas, 69008, Lyon, France
| | - Zdenko Herceg
- International Agency for Research on Cancer (IARC), 150 Cours Albert Thomas, 69008, Lyon, France
| | - Pekka Keski-Rahkonen
- International Agency for Research on Cancer (IARC), 150 Cours Albert Thomas, 69008, Lyon, France
| | - Theo M de Kok
- Department of Toxicogenomics, Maastricht University, Maastricht, The Netherlands
| | - Tim S Nawrot
- Centre for Environmental Sciences, Hasselt University, Agoralaan Building D, 3590, Diepenbeek, Belgium
| | - Caroline L Relton
- Μedical Research Council Integrative Epidemiology Unit, University of Bristol, Bristol, UK
| | - Oliver Robinson
- Medical Research Council Centre for Environment and Health, Department of Epidemiology and Biostatistics, The School of Public Health, Imperial College London, London, UK
- Mohn Centre for Children's Health and Well-being, The School of Public Health, Imperial College London, London, UK
| | - Theano Roumeliotaki
- Department of Social Medicine, Faculty of Medicine, University of Crete, Heraklion, Greece
| | - Augustin Scalbert
- International Agency for Research on Cancer (IARC), 150 Cours Albert Thomas, 69008, Lyon, France
| | - Martine Vrijheid
- International Agency for Research on Cancer (IARC), 150 Cours Albert Thomas, 69008, Lyon, France
| | - Paolo Vineis
- Medical Research Council Centre for Environment and Health, Department of Epidemiology and Biostatistics, The School of Public Health, Imperial College London, London, UK
| | - Lorenzo Richiardi
- Department of Medical Sciences, University of Turin and CPO-Piemonte, Turin, Italy
| | - Michelle Plusquin
- Centre for Environmental Sciences, Hasselt University, Agoralaan Building D, 3590, Diepenbeek, Belgium.
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Tan C, Shi C, Li Y, Teng W, Li Y, Fu H, Ren L, Yu H, Li Q, Liu S. Comparative Methylome Analysis Reveals Epigenetic Signatures Associated with Growth and Shell Color in the Pacific Oyster, Crassostrea gigas. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2022; 24:911-926. [PMID: 36087152 DOI: 10.1007/s10126-022-10154-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Accepted: 08/08/2022] [Indexed: 06/15/2023]
Abstract
Fast growth is one of the most important breeding goals for all economic species such as the Pacific oyster (Crassostrea gigas), an aquaculture mollusk with top global production. Although the genetic basis and molecular mechanisms of growth-related traits have been widely investigated in the oyster, the role of DNA methylation involved in growth regulation remains largely unexplored. In this study, we performed a comparative DNA methylome analysis of two selectively bred C. gigas strains with contrasted phenotypes in growth and shell color based on whole-genome bisulfite sequencing (WGBS). Genome-wide profiling of DNA methylation at the single-base resolution revealed that DNA methylations were widely spread across the genome with obvious hotspots, coinciding with the distribution of genes and repetitive elements. Higher methylation levels were observed within genic regions compared with intergenic and promoter regions. Comparative analysis of DNA methylation allowed the identification of 339,604 differentially methylated CpG sites (DMCs) clustering in 27,600 differentially methylated regions (DMRs). Functional annotation analysis identified 11,033 genes from DMRs which were enriched in biological processes including cytoskeleton system, cell cycle, signal transduction, and protein biosynthesis. Integrative analysis of methylome and transcriptome profiles revealed a positive correlation between gene expression and DNA methylation within gene-body regions. Protein-protein interaction (PPI) analysis of differentially expressed and methylated genes allowed for the identification of integrin beta-6 (homolog of human ITGB3) as a hub modulator of the PI3K/Akt signaling pathway that was involved in various growth-related processes. This work provided insights into epigenetic regulation of growth in oysters and will be valuable resources for studying DNA methylation in invertebrates.
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Affiliation(s)
- Chao Tan
- Key Laboratory of Mariculture, Ministry of Education College of Fisheries, Ocean University of China, Ocean University of China, 266003, Qingdao, China
| | - Chenyu Shi
- Key Laboratory of Mariculture, Ministry of Education College of Fisheries, Ocean University of China, Ocean University of China, 266003, Qingdao, China
| | - Yin Li
- Key Laboratory of Mariculture, Ministry of Education College of Fisheries, Ocean University of China, Ocean University of China, 266003, Qingdao, China
| | - Wen Teng
- Key Laboratory of Mariculture, Ministry of Education College of Fisheries, Ocean University of China, Ocean University of China, 266003, Qingdao, China
| | - Yongjing Li
- Key Laboratory of Mariculture, Ministry of Education College of Fisheries, Ocean University of China, Ocean University of China, 266003, Qingdao, China
| | - Huiru Fu
- Key Laboratory of Mariculture, Ministry of Education College of Fisheries, Ocean University of China, Ocean University of China, 266003, Qingdao, China
| | - Liting Ren
- Key Laboratory of Mariculture, Ministry of Education College of Fisheries, Ocean University of China, Ocean University of China, 266003, Qingdao, China
| | - Hong Yu
- Key Laboratory of Mariculture, Ministry of Education College of Fisheries, Ocean University of China, Ocean University of China, 266003, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China
| | - Qi Li
- Key Laboratory of Mariculture, Ministry of Education College of Fisheries, Ocean University of China, Ocean University of China, 266003, Qingdao, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China
| | - Shikai Liu
- Key Laboratory of Mariculture, Ministry of Education College of Fisheries, Ocean University of China, Ocean University of China, 266003, Qingdao, China.
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China.
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7
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Alfano R, Robinson O, Handakas E, Nawrot TS, Vineis P, Plusquin M. Perspectives and challenges of epigenetic determinants of childhood obesity: A systematic review. Obes Rev 2022; 23 Suppl 1:e13389. [PMID: 34816569 DOI: 10.1111/obr.13389] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 10/11/2021] [Indexed: 12/20/2022]
Abstract
The tremendous increase in childhood obesity prevalence over the last few decades cannot merely be explained by genetics and evolutionary changes in the genome, implying that gene-environment interactions, such as epigenetic modifications, likely play a major role. This systematic review aims to summarize the evidence of the association between epigenetics and childhood obesity. A literature search was performed via PubMed and Scopus engines using a combination of terms related to epigenetics and pediatric obesity. Articles studying the association between epigenetic mechanisms (including DNA methylation and hydroxymethylation, non-coding RNAs, and chromatin and histones modification) and obesity and/or overweight (or any related anthropometric parameters) in children (0-18 years) were included. The risk of bias was assessed with a modified Newcastle-Ottawa scale for non-randomized studies. One hundred twenty-one studies explored epigenetic changes related to childhood obesity. DNA methylation was the most widely investigated mechanism (N = 101 studies), followed by non-coding RNAs (N = 19 studies) with evidence suggestive of an association with childhood obesity for DNA methylation of specific genes and microRNAs (miRNAs). One study, focusing on histones modification, was identified. Heterogeneity of findings may have hindered more insights into the epigenetic changes related to childhood obesity. Gaps and challenges that future research should face are herein described.
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Affiliation(s)
- Rossella Alfano
- Department of Epidemiology and Biostatistics, The School of Public Health, Imperial College London, London, UK.,Medical Research Council-Health Protection Agency Centre for Environment and Health, Imperial College London, London, UK.,Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium
| | - Oliver Robinson
- Department of Epidemiology and Biostatistics, The School of Public Health, Imperial College London, London, UK.,Medical Research Council-Health Protection Agency Centre for Environment and Health, Imperial College London, London, UK
| | - Evangelos Handakas
- Department of Epidemiology and Biostatistics, The School of Public Health, Imperial College London, London, UK.,Medical Research Council-Health Protection Agency Centre for Environment and Health, Imperial College London, London, UK
| | - Tim S Nawrot
- Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium
| | - Paolo Vineis
- Department of Epidemiology and Biostatistics, The School of Public Health, Imperial College London, London, UK.,Medical Research Council-Health Protection Agency Centre for Environment and Health, Imperial College London, London, UK.,Unit of Molecular and Genetic Epidemiology, Human Genetic Foundation (HuGeF), Turin, Italy
| | - Michelle Plusquin
- Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium
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Liu C, Sun Y, Mustieles V, Chen YJ, Huang LL, Deng YL, Wang YX, Lu WQ, Messerlian C. Prenatal Exposure to Disinfection Byproducts and Intrauterine Growth in a Chinese Cohort. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:16011-16022. [PMID: 34813313 DOI: 10.1021/acs.est.1c04926] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Disinfection byproduct (DBP) exposure has been associated with birth size, pregnancy oxidative stress, and other adverse perinatal outcomes. However, little is known about the potential effect of prenatal DBP exposure on intrauterine growth. The present study included 1516 pregnant women from the Xiaogan Disinfection By-Products (XGDBP) birth cohort who were measured for four blood trihalomethanes [i.e., chloroform (TCM), bromodichloromethane (BDCM), dibromochloromethane (DBCM), and bromoform (TBM)] and two urinary haloacetic acids [i.e., dichloroacetic acid (DCAA) and trichloroacetic acid (TCAA)] across pregnancy trimesters. Second- and third-trimester fetal ultrasound measures of the abdominal circumference (AC), head circumference, biparietal diameter, femur length, and estimated fetal weight and birth weight were converted into z-scores. After adjusting for potential confounders, linear mixed models showed a decreasing AC z-score across tertiles of blood brominated THM (Br-THMs, the sum of BDCM, DBCM, and TBM) and total THM (THM4, the sum of Br-THMs and TCM) concentrations (both p for trend <0.01). We also observed a decreasing AC z-score across categories of blood TBM during pregnancy trimesters (p for trend = 0.03). Urinary haloacetic acids were unrelated to fetal growth parameters. In summary, prenatal exposure to THMs, particularly during the first trimester, was associated with reduced fetal abdominal circumference.
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Affiliation(s)
- Chong Liu
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei, China
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei, China
| | - Yang Sun
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, United States
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, United States
| | - Vicente Mustieles
- Center for Biomedical Research (CIBM), University of Granada, Granada 18016, Spain
- Consortium for Biomedical Research in Epidemiology & Public Health (CIBERESP), Madrid 28029, Spain
| | - Ying-Jun Chen
- Department of Epidemiology, School of Public Health, Southern Medical University, Guangzhou 510515, Guangdong, China
| | - Li-Li Huang
- School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China
| | - Yan-Ling Deng
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei, China
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei, China
| | - Yi-Xin Wang
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, United States
| | - Wen-Qing Lu
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei, China
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei, China
| | - Carmen Messerlian
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, United States
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, United States
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Cao C, Jia Z, Shao M, Li R, Sun Q, Liu D. Prenatal exposure to polycyclic aromatic hydrocarbons could increase the risk of low birth weight by affecting the DNA methylation states in a Chinese cohort. Reprod Biol 2021; 21:100574. [PMID: 34794034 DOI: 10.1016/j.repbio.2021.100574] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 10/28/2021] [Accepted: 10/30/2021] [Indexed: 11/18/2022]
Abstract
Polycyclic aromatic hydrocarbons (PAHs), as a kind of endocrine disruptors, can enter the fetus body cross the placental barrier from prenatal PAHs exposure to cause adverse birth outcomes. However, it is controversial association between prenatal PAHs exposure and low birth weight (LBW) of their infants. So the present study aimed to estimate the effects of prenatal PAHs exposure during the pregnancy on the risk of LBW in a Chinese cohort through modifying the DNA methylation states. A longitudinal prospective study with 407 pregnant women was established from May to October 2019. The prenatal PAHs exposure during the pregnancy was assessed using the internal dose such as the PAHs metabolites and PAH-DNA adducts in the umbilical cord blood. The methylation levels of genomic DNA and growth-related genes (IGF1 and IGF2) were assessed, while the expressions of these genes were both determined by RT-PCR and Elisa methods. The growth outcomes and relevant Z-scores were recorded at birth. The correlations between the DNA methylation status and concentrations of PAHs, expression levels of growth-related genes and body weight/WAZ were investigated as the measures. According to the PAH-DNA adducts, the subjects were divided into two groups: PAHs-exposed group (PAH-DNA adducts>0, n = 55) and non-exposed group (PAH-DNA adducts = 0, n = 352). Compared with the non-exposed group, it displayed marked decreased birth weight, and increased concentrations of PAHs and DNA methylation levels of the global genomic, IGF1 and IGF2 with their lower expressions in the PAHs-exposed group. These hypermethylation (global genomic, CpG14 and CpG15 of IGF1, and CpG14 of IGF2) were positively correlated with the contents of PAHs in the umbilical cord blood, and negatively correlated with the growth outcomes and their expressions. Totally, prenatal PAHs exposures may contribute to an increased risk of LBW of their infants by modulating the DNA methylation states of genomic DNA and growth-related genes (IGF1 and IGF2) in the umbilical cord blood, which could provide the prenatal prevention of PAHs exposure from possible environmental media except from the occupation and tobacco usage to ensure the health of their infants.
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Affiliation(s)
- Chunxia Cao
- Department of Pediatrics, Zibo Central Hospital, Shandong Province, 255000, China
| | - Zhiyi Jia
- Department of Pediatrics, Zibo Central Hospital, Shandong Province, 255000, China
| | - Mingyu Shao
- Department of Pediatrics, Zibo Central Hospital, Shandong Province, 255000, China
| | - Rongmiao Li
- Department of Thoracic Surgery, Huantai Country People's Hospital, Shandong Province, 255000, China
| | - Qi Sun
- Scientific Education and Communication Cooperation Office, Zibo Central Hospital, Shandong Province, 255000, China
| | - Dong Liu
- Department of Pediatrics, Zibo Central Hospital, Shandong Province, 255000, China.
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The effect of blastomere loss during frozen embryo transfer on the transcriptome of offspring's umbilical cord blood. Mol Biol Rep 2020; 47:8407-8417. [PMID: 33068229 DOI: 10.1007/s11033-020-05878-6] [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] [Received: 04/11/2020] [Accepted: 09/29/2020] [Indexed: 10/23/2022]
Abstract
Blastomere loss is a common issue during frozen-thawed embryo transfer (FET). Our previous study showed that blastomere loss was associated with an increased risk of small-for-gestational-age (SGA) neonates. The present study assessed the impact of blastomere loss during cryopreservation by comparing the mRNA profiles of umbilical cord blood of FET offspring from the prospective cohort study. Umbilical cord blood samples were collected from 48 neonates, including 12 from the loss group, 11 from the intact group, and 25 from the matched spontaneous pregnancy group. RNA-seq technology was used to compare the global gene expression profiles of the lymphocytes. Then, we used TopHat software to map the reads and quantitative real-time PCR to validate some important differentially expressed genes (DEGs). We identified 92 DEGs between the loss group and the spontaneous pregnancy group, including IGF2 and H19. Ingenuity Pathway Analysis (IPA) showed that the DEGs were most affected in the blastomere loss group. Downstream analysis also predicted the activation of organismal death pathways. In conclusions, our pilot study sheds light on the mechanism underlying how human blastomere loss may affect offspring at the gene expression level. These conclusions are, however, only suggestive, as the current study is based on a very limited sample size and type or nature of biological samples. Additional studies with larger sample sizes and independent experiments with placental samples should be conducted to verify these findings.
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11
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Argyraki M, Damdimopoulou P, Chatzimeletiou K, Grimbizis GF, Tarlatzis BC, Syrrou M, Lambropoulos A. In-utero stress and mode of conception: impact on regulation of imprinted genes, fetal development and future health. Hum Reprod Update 2020; 25:777-801. [PMID: 31633761 DOI: 10.1093/humupd/dmz025] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 07/04/2019] [Accepted: 07/12/2019] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Genomic imprinting is an epigenetic gene regulatory mechanism; disruption of this process during early embryonic development can have major consequences on both fetal and placental development. The periconceptional period and intrauterine life are crucial for determining long-term susceptibility to diseases. Treatments and procedures in assisted reproductive technologies (ART) and adverse in-utero environments may modify the methylation levels of genomic imprinting regions, including insulin-like growth factor 2 (IGF2)/H19, mesoderm-specific transcript (MEST), and paternally expressed gene 10 (PEG10), affecting the development of the fetus. ART, maternal psychological stress, and gestational exposures to chemicals are common stressors suspected to alter global epigenetic patterns including imprinted genes. OBJECTIVE AND RATIONALE Our objective is to highlight the effect of conception mode and maternal psychological stress on fetal development. Specifically, we monitor fetal programming, regulation of imprinted genes, fetal growth, and long-term disease risk, using the imprinted genes IGF2/H19, MEST, and PEG10 as examples. The possible role of environmental chemicals in genomic imprinting is also discussed. SEARCH METHODS A PubMed search of articles published mostly from 2005 to 2019 was conducted using search terms IGF2/H19, MEST, PEG10, imprinted genes, DNA methylation, gene expression, and imprinting disorders (IDs). Studies focusing on maternal prenatal stress, psychological well-being, environmental chemicals, ART, and placental/fetal development were evaluated and included in this review. OUTCOMES IGF2/H19, MEST, and PEG10 imprinted genes have a broad developmental effect on fetal growth and birth weight variation. Their disruption is linked to pregnancy complications, metabolic disorders, cognitive impairment, and cancer. Adverse early environment has a major impact on the developing fetus, affecting mostly growth, the structure, and subsequent function of the hypothalamic-pituitary-adrenal axis and neurodevelopment. Extensive evidence suggests that the gestational environment has an impact on epigenetic patterns including imprinting, which can lead to adverse long-term outcomes in the offspring. Environmental stressors such as maternal prenatal psychological stress have been found to associate with altered DNA methylation patterns in placenta and to affect fetal development. Studies conducted during the past decades have suggested that ART pregnancies are at a higher risk for a number of complications such as birth defects and IDs. ART procedures involve multiple steps that are conducted during critical windows for imprinting establishment and maintenance, necessitating long-term evaluation of children conceived through ART. Exposure to environmental chemicals can affect placental imprinting and fetal growth both in humans and in experimental animals. Therefore, their role in imprinting should be better elucidated, considering the ubiquitous exposure to these chemicals. WIDER IMPLICATIONS Dysregulation of imprinted genes is a plausible mechanism linking stressors such as maternal psychological stress, conception using ART, and chemical exposures with fetal growth. It is expected that a greater understanding of the role of imprinted genes and their regulation in fetal development will provide insights for clinical prevention and management of growth and IDs. In a broader context, evidence connecting impaired imprinted gene function to common diseases such as cancer is increasing. This implies early regulation of imprinting may enable control of long-term human health, reducing the burden of disease in the population in years to come.
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Affiliation(s)
- Maria Argyraki
- First Department of Obstetrics and Gynecology, Laboratory of Genetics, School of Medicine, Aristotle University of Thessaloniki, Papageorgiou General Hospital, Ring Road, Nea Efkarpia, 56403 Thessaloniki, Greece
| | - Pauliina Damdimopoulou
- Karolinska Institutet, Department of Clinical Sciences, Intervention and Technology, Unit of Obstetrics and Gynecology, K57 Karolinska University Hospital Huddinge, SE-14186 Stockholm, Sweden
| | - Katerina Chatzimeletiou
- First Department of Obstetrics and Gynecology, Unit for Human Reproduction, School of Medicine, Aristotle University of Thessaloniki, Papageorgiou General Hospital, Ring Road, Nea Efkarpia, 56403 Thessaloniki, Greece
| | - Grigoris F Grimbizis
- First Department of Obstetrics and Gynecology, Unit for Human Reproduction, School of Medicine, Aristotle University of Thessaloniki, Papageorgiou General Hospital, Ring Road, Nea Efkarpia, 56403 Thessaloniki, Greece
| | - Basil C Tarlatzis
- First Department of Obstetrics and Gynecology, Unit for Human Reproduction, School of Medicine, Aristotle University of Thessaloniki, Papageorgiou General Hospital, Ring Road, Nea Efkarpia, 56403 Thessaloniki, Greece
| | - Maria Syrrou
- Department of Biology, Laboratory of Biology, School of Health Sciences, University of Ioannina, Dourouti University Campus, 45110, Ioannina, Greece
| | - Alexandros Lambropoulos
- First Department of Obstetrics and Gynecology, Laboratory of Genetics, School of Medicine, Aristotle University of Thessaloniki, Papageorgiou General Hospital, Ring Road, Nea Efkarpia, 56403 Thessaloniki, Greece
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12
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Differences in DNA methylation of insulin-like growth factor 2 and cadherin 13 in patients with preeclampsia. Pregnancy Hypertens 2020; 19:150-158. [PMID: 32007784 DOI: 10.1016/j.preghy.2020.01.010] [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] [Received: 08/13/2019] [Revised: 01/07/2020] [Accepted: 01/10/2020] [Indexed: 01/13/2023]
Abstract
OBJECTIVES In a previous mass spectrometry study of our research group, 25 proteins were found to be differentially expressed in cerebrospinal fluid of patients with preeclampsia compared to controls. The objective of the current study was to investigate DNA methylation of the genes encoding for the former mentioned proteins in an independent dataset. STUDY DESIGN In a nested case-control study of the Rotterdam Periconceptional Cohort, placental tissue, umbilical cord white blood cells and human umbilical vein endothelial cells (HUVEC) were obtained of 13 patients with early-onset preeclampsia, 16 patients with late-onset preeclampsia and 83 normotensive controls (27 patients with fetal growth restriction, 20 patients with spontaneous preterm birth and 36 uncomplicated pregnancies). DNA methylation of 783 CpGs in regions of 25 genes was measured. MAIN OUTCOME MEASURES DNA methylation of selected candidate genes in early- and late-onset preeclampsia compared to fetal growth restriction, spontaneous preterm birth and uncomplicated controls. RESULTS From the 783 CpGs of the 25 selected genes, 15 CpGs were differentially methylated between early-onset preeclampsia and spontaneous preterm birth (3.80 E-5 ≤ p ≤ 0.036). Four CpGs were differentially methylated between early-onset preeclampsia and fetal growth restriction (0.0002 ≤ p ≤ 0.037) and 13 CpGs were differentially methylated between early onset preeclampsia and uncomplicated controls (0.0001 ≤ p ≤ 0.04). CONCLUSION Differences in DNA methylation were found in placental tissue, umbilical cord white blood cells and HUVEC of patients with early onset preeclampsia compared to (un)complicated controls, but not in patients with late-onset preeclampsia. The genes showing the largest differential methylation encode insulin-like growth factor 2 binding protein and receptor and cadherin 13.
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13
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Liu J, Zhang Z, Xu J, Song X, Yuan W, Miao M, Liang H, Du J. Genome-wide DNA methylation changes in placenta tissues associated with small for gestational age newborns; cohort study in the Chinese population. Epigenomics 2019; 11:1399-1412. [PMID: 31596135 DOI: 10.2217/epi-2019-0004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Aim: To investigate DNA methylation changes in placenta tissues associated with small for gestational age (SGA). Materials & methods: A prospective cohort study consisting of 1292 pregnant women from China (including 39 SGA with placenta tissues) was performed, microarray and pyrosequencing were conducted. Results: Total 2012 methylation variable positions stood out from all probes (p < 0.05; Δβ > 0.2). In SGA cases, a CpG site within ANKRD20B showed lower methylation level (p = 0.032) than appropriate for gestational age in validation cohort. Five sites within FAM198A (p = 0.047, 0.050, 0.039, 0.026 and 0.043, respectively) had a reduced methylation in male newborns whose mother had preconception folic acid supplementation. Conclusion: DNA methylation changes in placenta tissues may be associated with SGA, maternal preconception folic acid supplementation status and also be fetal sex-specific.
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Affiliation(s)
- Junwei Liu
- NHC Key Lab of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), School of Pharmacy, Fudan University, Shanghai 200032, China
| | - Zhaofeng Zhang
- NHC Key Lab of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), School of Pharmacy, Fudan University, Shanghai 200032, China
| | - Jianhua Xu
- NHC Key Lab of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), School of Pharmacy, Fudan University, Shanghai 200032, China
| | - Xiuxia Song
- NHC Key Lab of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Fudan University, Shanghai 200032, China
| | - Wei Yuan
- NHC Key Lab of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Fudan University, Shanghai 200032, China
| | - Maohua Miao
- NHC Key Lab of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Fudan University, Shanghai 200032, China
| | - Hong Liang
- NHC Key Lab of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Fudan University, Shanghai 200032, China
| | - Jing Du
- NHC Key Lab of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), School of Pharmacy, Fudan University, Shanghai 200032, China
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14
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Do EK, Zucker NL, Huang ZY, Schechter JC, Kollins SH, Maguire RL, Murphy SK, Hoyo C, Fuemmeler BF. Associations between imprinted gene differentially methylated regions, appetitive traits and body mass index in children. Pediatr Obes 2019; 14:e12454. [PMID: 30231188 PMCID: PMC6437681 DOI: 10.1111/ijpo.12454] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 06/15/2018] [Indexed: 12/23/2022]
Abstract
BACKGROUND Knowledge regarding genetic influences on eating behaviours is expanding; yet less is known regarding contributions of epigenetic variation to appetitive traits and body mass index (BMI) in children. OBJECTIVE The purpose of this study was to explore relationships between methylation at differentially methylated regions (DMRs) of imprinted genes (insulin-like growth factor 2/H19 and Delta-like, Drosophila, homolog 1/maternally expressed gene 3) using DNA extracted from umbilical cord blood leucocytes, two genetically influenced appetitive traits (food responsiveness and satiety responsiveness) and BMI. METHODS Data were obtained from participants (N = 317; mean age = 3.6 years; SD = 1.8 years) from the Newborn Epigenetic STudy. Conditional process models were implemented to investigate the associations between DMRs of imprinted genes and BMI, and test whether this association was mediated by appetitive traits and birthweight and moderated by sex. RESULTS Appetitive traits and birthweight did not mediate the relationship between methylation at DMRs. Increased insulin-like growth factor 2 DMR methylation was associated with higher satiety responsiveness. Higher satiety responsiveness was associated with lower BMI. Associations between methylation at DMRs, appetitive traits and BMI differed by sex. CONCLUSIONS This is one of the first studies to demonstrate associations between epigenetic variation established prior to birth with appetitive traits and BMI in children, providing support for the need to uncover genetic and epigenetic mechanisms for appetitive traits predisposing some individuals to obesity.
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Affiliation(s)
- E. K. Do
- Department of Health Behavior and Policy, Virginia Commonwealth University, Richmond, VA, USA
| | - N. L. Zucker
- Duke Center for Eating Disorders and the Department of Psychiatry and Behavioral Sciences, Duke University, Durham, NC, USA
| | - Z. Y. Huang
- Department of Obstetrics and Gynecology, Duke University Medical Center, Durham, NC, US
| | - J. C. Schechter
- Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC, USA
| | - S. H. Kollins
- Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC, USA
| | - R. L. Maguire
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, USA
| | - S. K. Murphy
- Department of Obstetrics and Gynecology, Duke University Medical Center, Durham, NC, US
| | - C. Hoyo
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, USA
| | - B. F. Fuemmeler
- Department of Health Behavior and Policy, Virginia Commonwealth University, Richmond, VA, USA
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15
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James P, Sajjadi S, Tomar AS, Saffari A, Fall CHD, Prentice AM, Shrestha S, Issarapu P, Yadav DK, Kaur L, Lillycrop K, Silver M, Chandak GR. Candidate genes linking maternal nutrient exposure to offspring health via DNA methylation: a review of existing evidence in humans with specific focus on one-carbon metabolism. Int J Epidemiol 2018; 47:1910-1937. [PMID: 30137462 PMCID: PMC6280938 DOI: 10.1093/ije/dyy153] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/04/2018] [Indexed: 12/13/2022] Open
Abstract
Background Mounting evidence suggests that nutritional exposures during pregnancy influence the fetal epigenome, and that these epigenetic changes can persist postnatally, with implications for disease risk across the life course. Methods We review human intergenerational studies using a three-part search strategy. Search 1 investigates associations between preconceptional or pregnancy nutritional exposures, focusing on one-carbon metabolism, and offspring DNA methylation. Search 2 considers associations between offspring DNA methylation at genes found in the first search and growth-related, cardiometabolic and cognitive outcomes. Search 3 isolates those studies explicitly linking maternal nutritional exposure to offspring phenotype via DNA methylation. Finally, we compile all candidate genes and regions of interest identified in the searches and describe their genomic locations, annotations and coverage on the Illumina Infinium Methylation beadchip arrays. Results We summarize findings from the 34 studies found in the first search, the 31 studies found in the second search and the eight studies found in the third search. We provide details of all regions of interest within 45 genes captured by this review. Conclusions Many studies have investigated imprinted genes as priority loci, but with the adoption of microarray-based platforms other candidate genes and gene classes are now emerging. Despite a wealth of information, the current literature is characterized by heterogeneous exposures and outcomes, and mostly comprise observational associations that are frequently underpowered. The synthesis of current knowledge provided by this review identifies research needs on the pathway to developing possible early life interventions to optimize lifelong health.
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Affiliation(s)
- Philip James
- MRC Unit The Gambia at the London School of Hygiene and Tropical Medicine, London, UK
| | - Sara Sajjadi
- Genomic Research on Complex Diseases (GRC Group), CSIR-Centre for Cellular and Molecular Biology, Hyderabad, India
| | - Ashutosh Singh Tomar
- Genomic Research on Complex Diseases (GRC Group), CSIR-Centre for Cellular and Molecular Biology, Hyderabad, India
| | - Ayden Saffari
- MRC Unit The Gambia at the London School of Hygiene and Tropical Medicine, London, UK
| | - Caroline H D Fall
- MRC Life course Epidemiology Unit, University of Southampton, Southampton General Hospital, Southampton, UK
| | - Andrew M Prentice
- MRC Unit The Gambia at the London School of Hygiene and Tropical Medicine, London, UK
| | - Smeeta Shrestha
- Genomic Research on Complex Diseases (GRC Group), CSIR-Centre for Cellular and Molecular Biology, Hyderabad, India
- School of Basic and Applied Sciences, Dayananda Sagar University, Bangalore, India
| | - Prachand Issarapu
- Genomic Research on Complex Diseases (GRC Group), CSIR-Centre for Cellular and Molecular Biology, Hyderabad, India
| | - Dilip Kumar Yadav
- Genomic Research on Complex Diseases (GRC Group), CSIR-Centre for Cellular and Molecular Biology, Hyderabad, India
| | - Lovejeet Kaur
- Genomic Research on Complex Diseases (GRC Group), CSIR-Centre for Cellular and Molecular Biology, Hyderabad, India
| | - Karen Lillycrop
- Research Centre for Biological Sciences, Institute of Developmental Sciences, University of Southampton, Southampton, UK
| | - Matt Silver
- MRC Unit The Gambia at the London School of Hygiene and Tropical Medicine, London, UK
| | - Giriraj R Chandak
- Genomic Research on Complex Diseases (GRC Group), CSIR-Centre for Cellular and Molecular Biology, Hyderabad, India
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16
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Hernandez MI, Rossel K, Peña V, Garcia M, Cavada G, Avila A, Iñiguez G, Mericq V. Patterns of Infancy Growth and Metabolic Hormonal Profile Are Different in Very-Low-Birth-Weight Preterm Infants Born Small for Gestational Age Compared to Those Born Appropriate for Gestational Age. Horm Res Paediatr 2018; 89:233-245. [PMID: 29763893 DOI: 10.1159/000487994] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 02/26/2018] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS An increased preterm birth survival rate is associated with long-term neurological and metabolic risks; thus, our aim was to evaluate whether early patterns of infancy anthropometry and metabolic hormonal profile differ in preterm infants born small for gestational age (SGA) or appropriate for gestational age (AGA) from birth to 36 months of corrected age (CA). METHODS We recruited 110 very-low-birth-weight (VLBW) preterm infants (AGA = 60 and SGA = 50) with a mean birth weight of -2.39 ± 0.77 versus 0.57 ± 0.54 standard deviation scores (SDS) (p < 0.01) and birth length of -2.1 ± 1.05 versus -0.44 ± 0.82 SDS (p < 0.01), respectively. Anthropometry and blood sampling for insulin, insulin-like growth factor (IGF)-II, IGF-I, and leptin were performed for up to 3 years. RESULTS All neonates increased their weight, length, and head circumference SDS during the early inpatient period. Up to 90% reached a normal length within this period. The IGF-II, insulin, and glycemia concentrations changed in parallel with weight. In the first year of CA, only SGA infants gained weight and height SDS. The homoeostatic model assessment had a trend toward higher values in SGA infants at 24 and 36 months (p = 0.06 and p = 0.07). CONCLUSION Being SGA is the strongest predictor of early recovery of height in VLBW preterm infants. Follow-up will allow us to determine whether the differences in the growth patterns of VLBW preterm infants by birth weight SDS persist.
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Affiliation(s)
- María Isabel Hernandez
- Institute of Maternal and Child Research, Faculty of Medicine, University of Chile, Santiago de Chile, Chile
| | - Katherine Rossel
- Unit of Neonatology, Department of Pediatrics Hospital San Borja Arriaran, Santiago de Chile, Chile
| | - Veronica Peña
- Institute of Maternal and Child Research, Faculty of Medicine, University of Chile, Santiago de Chile, Chile.,Unit of Neonatology, Department of Pediatrics Hospital San Borja Arriaran, Santiago de Chile, Chile
| | - Mirna Garcia
- Unit of Neonatology, Department of Pediatrics Hospital San Borja Arriaran, Santiago de Chile, Chile
| | - Gabriel Cavada
- Department of Public Health, University of Chile and University of Los Andes, Santiago de Chile, Chile
| | - Alejandra Avila
- Institute of Maternal and Child Research, Faculty of Medicine, University of Chile, Santiago de Chile, Chile
| | - German Iñiguez
- Institute of Maternal and Child Research, Faculty of Medicine, University of Chile, Santiago de Chile, Chile
| | - Verónica Mericq
- Institute of Maternal and Child Research, Faculty of Medicine, University of Chile, Santiago de Chile, Chile
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17
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James PT, Dominguez-Salas P, Hennig BJ, Moore SE, Prentice AM, Silver MJ. Maternal One-Carbon Metabolism and Infant DNA Methylation between Contrasting Seasonal Environments: A Case Study from The Gambia. Curr Dev Nutr 2018. [PMCID: PMC6351729 DOI: 10.1093/cdn/nzy082] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Background The periconceptional period is a time in which environmentally induced changes to the epigenome could have significant consequences for offspring health. Metastable epialleles (MEs) are genomic loci demonstrating interindividual variation in DNA methylation with intraindividual crosstissue correlation, suggesting that methylation states are established in the very early embryo before gastrulation. In our previous Gambian studies, we have shown that ME methylation states in the offspring are predicted by maternal concentrations of certain nutritional biomarkers around the time of conception. Objective We aimed to assess whether the profile of maternal biomarker predictors of offspring methylation differs between rainy and dry seasons in a population of rural Gambians, using a larger set of 50 recently identified MEs. Methods We measured 1-carbon biomarkers in maternal plasma back-extrapolated to conception, and cytosine-phosphate-guanine (CpG) methylation at 50 ME loci in their infants’ blood at a mean age of 3.3 mo (n = 120 mother-child pairs). We tested for interactions between seasonality and effects of biomarker concentrations on mean ME methylation z score. We used backward stepwise linear regression to select the profile of nutritional predictors of methylation in each season and repeated this analysis with biomarker principal components (PCs) to capture biomarker covariation. Results We found preliminary evidence of seasonal differences in biomarker-methylation associations for folate, choline, and homocysteine (interaction P values ≤0.03). Furthermore, in stratified analyses, biomarker predictors of methylation changed between seasons. In the dry season, vitamin B-2 and methionine were positive predictors. In the rainy season, however, choline and vitamin B-6 were positive predictors, and folate and vitamin B-12 were negative predictors. PC1 captured covariation in the folate metabolism cycle and predicted methylation in dry season conceptions. PC2 represented the betaine remethylation pathway and predicted rainy season methylation. Conclusions Underlying nutritional status may modify the association between nutritional biomarkers and methylation, and should be considered in future studies.
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Affiliation(s)
- Philip T James
- Medical Research Council Unit The Gambia at the London School of Hygiene and Tropical Medicine, London, United Kingdom
- Address correspondence to PTJ (e-mail: )
| | - Paula Dominguez-Salas
- Department of Production and Population Health, Royal Veterinary College, London, United Kingdom
| | - Branwen J Hennig
- Population Health, Science Division, Wellcome Trust, London, United Kingdom
| | - Sophie E Moore
- Medical Research Council Unit The Gambia at the London School of Hygiene and Tropical Medicine, London, United Kingdom
- Department of Women and Children's Health, King's College London, London, United Kingdom
| | - Andrew M Prentice
- Medical Research Council Unit The Gambia at the London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Matt J Silver
- Medical Research Council Unit The Gambia at the London School of Hygiene and Tropical Medicine, London, United Kingdom
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18
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Maddock J, Wulaningsih W, Fernandez JC, Ploubidis GB, Goodman A, Bell J, Kuh D, Hardy R. Associations between body size, nutrition and socioeconomic position in early life and the epigenome: A systematic review. PLoS One 2018; 13:e0201672. [PMID: 30096154 PMCID: PMC6086410 DOI: 10.1371/journal.pone.0201672] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Accepted: 07/18/2018] [Indexed: 12/19/2022] Open
Abstract
Background Body size, nutrition and socioeconomic position (SEP) in early life have been associated with a wide range of long-term health effects. Epigenetics is one possible mechanism through which these early life exposures can impact later life health. We conducted a systematic review examining the observational evidence for the impact of body size, nutrition and SEP in early life on the epigenome in humans. Methods This systematic review is registered with the PROSPERO database (registration number: CRD42016050193). Three datasets were simultaneously searched using Ovid and the resulting studies were evaluated by at least two independent reviewers. Studies measuring epigenetic markers either at the same time as, or after, the early life exposure and have a measure of body size, nutrition or SEP in early life (up to 12 years), written in English and from a community-dwelling participants were included. Results We identified 90 eligible studies. Seventeen of these papers examined more than one early life exposure of interest. Fifty six papers examined body size, 37 nutrition and 17 SEP. All of the included papers examined DNA methylation (DNAm) as the epigenetic marker. Overall there was no strong evidence for a consistent association between these early life variables in DNAm which may be due to the heterogeneous study designs, data collection methods and statistical analyses. Conclusions Despite these inconclusive results, the hypothesis that the early life environment can impact DNAm, potentially persisting into adult life, was supported by some studies and warrants further investigation. We provide recommendations for future studies.
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Affiliation(s)
- Jane Maddock
- MRC Unit for Lifelong Health and Ageing, Institute of Cardiovascular Science, University College London, London, United Kingdom
- * E-mail:
| | - Wahyu Wulaningsih
- MRC Unit for Lifelong Health and Ageing, Institute of Cardiovascular Science, University College London, London, United Kingdom
| | - Juan Castillo Fernandez
- Department of Twin Research and Genetic Epidemiology, King's College London, London, United Kingdom
| | - George B. Ploubidis
- Centre for Longitudinal Studies, UCL Institute of Education, University College London, London, United Kingdom
| | - Alissa Goodman
- Centre for Longitudinal Studies, UCL Institute of Education, University College London, London, United Kingdom
| | - Jordana Bell
- Department of Twin Research and Genetic Epidemiology, King's College London, London, United Kingdom
| | - Diana Kuh
- MRC Unit for Lifelong Health and Ageing, Institute of Cardiovascular Science, University College London, London, United Kingdom
| | - Rebecca Hardy
- MRC Unit for Lifelong Health and Ageing, Institute of Cardiovascular Science, University College London, London, United Kingdom
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Gonzalez-Nahm S, Mendez MA, Benjamin-Neelon SE, Murphy SK, Hogan VK, Rowley DL, Hoyo C. DNA methylation of imprinted genes at birth is associated with child weight status at birth, 1 year, and 3 years. Clin Epigenetics 2018; 10:90. [PMID: 29988473 PMCID: PMC6025828 DOI: 10.1186/s13148-018-0521-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 06/19/2018] [Indexed: 12/19/2022] Open
Abstract
Background This study assessed the associations between nine differentially methylated regions (DMRs) of imprinted genes in DNA derived from umbilical cord blood leukocytes in males and females and (1) birth weight for gestational age z score, (2) weight-for-length (WFL) z score at 1 year, and (3) body mass index (BMI) z score at 3 years. Methods We conducted multiple linear regression in n = 567 infants at birth, n = 288 children at 1 year, and n = 294 children at 3 years from the Newborn Epigenetics Study (NEST). We stratified by sex and adjusted for race/ethnicity, maternal education, maternal pre-pregnancy BMI, prenatal smoking, maternal age, gestational age, and paternal race. We also conducted analysis restricting to infants not born small for gestational age. Results We found an association between higher methylation of the sequences regulating paternally expressed gene 10 (PEG10) and anthropometric z scores at 1 year (β = 0.84; 95% CI = 0.34, 1.33; p = 0.001) and 3 years (β = 1.03; 95% CI = 0.37, 1.69; p value = 0.003) in males only. Higher methylation of the DMR regulating mesoderm-specific transcript (MEST) was associated with lower anthropometric z scores in females at 1 year (β = - 1.03; 95% CI - 1.60, - 0.45; p value = 0.001) and 3 years (β = - 1.11; 95% CI - 1.98, - 0.24; p value = 0.01). These associations persisted when we restricted to infants not born small for gestational age. Conclusion Our data support a sex-specific association between altered methylation and weight status in early life. These methylation marks can contribute to the compendium of epigenetically regulated regions detectable at birth, influencing obesity in childhood. Larger studies are required to confirm these findings.
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Affiliation(s)
- Sarah Gonzalez-Nahm
- Department of Health, Behavior and Society, Johns Hopkins Bloomberg School of Public Health, 624 N Broadway, Baltimore, MD 21205 USA
| | - Michelle A. Mendez
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC USA
| | - Sara E. Benjamin-Neelon
- Department of Health, Behavior and Society, Johns Hopkins Bloomberg School of Public Health, 624 N Broadway, Baltimore, MD 21205 USA
| | - Susan K. Murphy
- Department of Obstetrics and Gynecology, Duke University Medical Center, Durham, NC USA
| | | | - Diane L. Rowley
- Department of Maternal and Child Health, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC USA
| | - Cathrine Hoyo
- Department of Biological Sciences, North Carolina State University, Raleigh, NC USA
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Liu C, Jiao C, Wang K, Yuan N. DNA Methylation and Psychiatric Disorders. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2018; 157:175-232. [PMID: 29933950 DOI: 10.1016/bs.pmbts.2018.01.006] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
DNA methylation has been an important area of research in the study of molecular mechanism to psychiatric disorders. Recent evidence has suggested that abnormalities in global methylation, methylation of genes, and pathways could play a role in the etiology of many forms of mental illness. In this article, we review the mechanisms of DNA methylation, including the genetic and environmental factors affecting methylation changes. We report and discuss major findings regarding DNA methylation in psychiatric patients, both within the context of global methylation studies and gene-specific methylation studies. Finally, we discuss issues surrounding data quality improvement, the limitations of current methylation analysis methods, and the possibility of using DNA methylation-based treatment for psychiatric disorders in the future.
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Affiliation(s)
- Chunyu Liu
- University of Illinois, Chicago, IL, United States; School of Life Science, Central South University, Changsha, China.
| | - Chuan Jiao
- School of Life Science, Central South University, Changsha, China
| | - Kangli Wang
- School of Life Science, Central South University, Changsha, China
| | - Ning Yuan
- Hunan Brain Hospital, Changsha, China
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Tian FY, Wang XM, Xie C, Zhao B, Niu Z, Fan L, Hivert MF, Chen WQ. Placental surface area mediates the association between FGFR2 methylation in placenta and full-term low birth weight in girls. Clin Epigenetics 2018; 10:39. [PMID: 29588807 PMCID: PMC5863829 DOI: 10.1186/s13148-018-0472-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 03/14/2018] [Indexed: 12/14/2022] Open
Abstract
Background Fibroblast growth factor receptor 2 (FGFR2) gene encodes a protein of the fibroblast growth factor receptor family. FGFR2 gene expression is associated with the regulation of implantation process of placenta which plays a vital role in fetal growth. DNA methylation is widely known as a mechanism of fetal growth. However, it is unclear whether and how DNA methylation of FGFR2 gene in the placenta is associated with full-term low birth weight. This case-control study aims to explore the links between FGFR2 methylation in placenta and full-term low birth weight and to further examine the mediation effect of placental surface area on this association. Results We conducted analyses for each of the five valid CpG sites at FGFR2 in 165 mother-baby pairs (86 FT-LBW vs. 79 FT-NBW) and found that per one standard deviation increase in the DNA methylation of CpG 11 at FGFR2 was associated with 1.64-fold higher risk of full-term low birth weight (OR = 1.64, 95% CI = [1.07, 2.52]) and 0.18 standard deviation decrease in placental surface area (β = - 0.18; standard error = 0.08, p = 0.02). The mediation effect of placental surface area on the association between DNA methylation and full-term low birth weight was significant in girls (OR = 1.38, 95% CI = [1.05, 1.80]) but not in boys. The estimated mediation proportion was 48.38%. Conclusion Our findings suggested that placental surface area mediated the association between DNA methylation of FGFR2 in placenta and full-term low birth weight in a sex-specific manner. Our study supported the importance of placental epigenetic changes in placental development and fetal growth.
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Affiliation(s)
- Fu-Ying Tian
- 1Department of Medical Statistics and Epidemiology, Guangzhou Key Laboratory of Environmental Pollution and Health Assessment, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Room 715, 74 Zhongshan Road 2, Guangzhou, 510080 Guangdong China
| | - Xi-Meng Wang
- 1Department of Medical Statistics and Epidemiology, Guangzhou Key Laboratory of Environmental Pollution and Health Assessment, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Room 715, 74 Zhongshan Road 2, Guangzhou, 510080 Guangdong China
| | - Chuanbo Xie
- Department of Cancer Prevention Research, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Bo Zhao
- 3Children's Hospital Boston and Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115 USA
| | - Zhongzheng Niu
- 4Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, State University of New York at Buffalo, 265 Farber Hall, Buffalo, NY 14214 USA
| | - Lijun Fan
- 1Department of Medical Statistics and Epidemiology, Guangzhou Key Laboratory of Environmental Pollution and Health Assessment, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Room 715, 74 Zhongshan Road 2, Guangzhou, 510080 Guangdong China
| | - Marie-France Hivert
- 5Department of Population Medicine, Harvard Medical School, Harvard Pilgrim Health Care Institute, 401 Park Drive, Suite 401, Boston, MA USA.,6Diabetes Center, Massachusetts General Hospital, 50 Staniford Street, Boston, MA USA.,7Department of Medicine, Université de Sherbrooke, 3001 12th Avenue North, Sherbrooke, Québec Canada.,8Centre de recherche du Centre Hospitalier Universitaire de Sherbrooke, 3001 12th Avenue North, wing 9, door 6, Sherbrooke, Québec Canada
| | - Wei-Qing Chen
- 1Department of Medical Statistics and Epidemiology, Guangzhou Key Laboratory of Environmental Pollution and Health Assessment, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Room 715, 74 Zhongshan Road 2, Guangzhou, 510080 Guangdong China.,9Department of Information Management, Xinhua College, Sun Yat-sen University, Guangzhou, Guangdong China
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22
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Associations between maternal prenatal stress, methylation changes in IGF1 and IGF2, and birth weight. J Dev Orig Health Dis 2017; 9:215-222. [PMID: 29017633 DOI: 10.1017/s2040174417000800] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Maternal stress has been linked to low birth weight in newborns. One potential pathway involves epigenetic changes at candidate genes that may mediate the effects of prenatal maternal stress on birth weight. This relationship has been documented in stress-related genes, such as NR3C1. There is less literature exploring the effect of stress on growth-related genes. IGF1 and IGF2 have been implicated in fetal growth and development, though via different mechanisms as IGF2 is under imprinting control. In this study, we tested for associations between prenatal stress, methylation of IGF1 and IGF2, and birth weight. A total of 24 mother-newborn dyads in the Democratic Republic of Congo were enrolled. Ethnographic interviews were conducted with mothers at delivery to gather culturally relevant war-related and chronic stressors. DNA methylation data were generated from maternal venous, cord blood and placental tissue samples. Multivariate regressions were used to test for associations between stress measures, DNA methylation and birth weight in each of the three tissue types. We found an association between IGF2 methylation in maternal blood and birth weight. Previous literature on the relationship between IGF2 methylation and birth weight has focused on methylation at known differentially methylated regions in cord blood or placental samples. Our findings indicate there may be links between the maternal epigenome and low birth weight that rely on mechanisms outside known imprinting pathways. It thus may be important to consider the effect of maternal exposures and epigenetic profiles on birth weight even in the setting of maternally imprinted genes such as IGF2.
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Kobayashi S, Sata F, Miyashita C, Miura R, Azumi K, Kobayashi S, Goudarzi H, Araki A, Ishizuka M, Todaka T, Kajiwara J, Hori T, Kishi R. Gender-specific association of exposure to non-dioxin-like polychlorinated biphenyls during pregnancy with methylation levels of H19 and long interspersed nuclear element-1 in cord blood in the Hokkaido study. Toxicology 2017; 390:135-145. [PMID: 28865728 DOI: 10.1016/j.tox.2017.08.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 08/27/2017] [Accepted: 08/29/2017] [Indexed: 12/13/2022]
Abstract
BACKGROUND Associations between prenatal exposure to polychlorinated biphenyls (PCBs) and reduced birth-size, and between DNA methylation of insulin-like growth factor-2 (IGF-2), H19 locus, and long interspersed nuclear element-1 (LINE-1) and reduced birth-size are well established. To date, however, studies on the associations between prenatal exposure to PCBs and alterations in methylation of IGF-2, H19, and LINE-1 are lacking. Thus, in this study, we examined these associations with infant-gender stratification. METHODS We performed a prospective birth cohort study using the Sapporo cohort from the previously described Hokkaido Birth Cohort Study on Environment and Children's Health conducted between 2002 and 2005 in Japan. In the final 169 study participants included in this study, we measured the concentrations of various non-dioxin-like PCBs in maternal blood during pregnancy using high-resolution gas chromatography/high-resolution mass spectrometry. IGF-2, H19 and LINE-1 methylation levels in cord blood were measured using the bisulfite pyrosequencing methods Finally, we assessed the associations between prenatal exposure to various PCBs and the gene methylation levels using multiple regression models stratified by infant gender. RESULTS We observed a 0.017 (95% confidence interval [CI]: 0.003-0.031) increase in the log10-transformed H19 methylation levels (%) in cord blood for each ten-fold increase in the levels of decachlorinated biphenyls (decaCBs) in maternal blood among all infants. Similarly, a 0.005 (95% CI: 0.000-0.010) increase in the log10-transformed LINE-1 methylation levels (%) in cord blood was associated with each ten-fold increase in heptachlorinated biphenyls (heptaCBs) in maternal blood among all infants. In particular, we observed a dose-dependent association of the decaCB levels in maternal blood with the H19 methylation levels among female infants (P value for trend=0.040); likewise a dose-dependent association of heptaCB levels was observed with LINE-1 methylation levels among female infants (P value for trend=0.015). Moreover, these associations were only observed among infants of primiparous women. CONCLUSION Our results suggest that the dose-dependent association between prenatal exposure to specific non-dioxin-like PCBs and increases in the H19 and LINE-1 methylation levels in cord blood might be more predominant in females than in males.
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Affiliation(s)
- Sumitaka Kobayashi
- Center for Environmental and Health Sciences, Hokkaido University, North-12, West-7, Kita-ku, Sapporo, Hokkaido 060-0812, Japan.
| | - Fumihiro Sata
- Center for Environmental and Health Sciences, Hokkaido University, North-12, West-7, Kita-ku, Sapporo, Hokkaido 060-0812, Japan; Health Center, Chuo University, 42-8, Ichigaya-Hommura-cho, Shinjuku-ku, Tokyo 162-8473, Japan.
| | - Chihiro Miyashita
- Center for Environmental and Health Sciences, Hokkaido University, North-12, West-7, Kita-ku, Sapporo, Hokkaido 060-0812, Japan.
| | - Ryu Miura
- Center for Environmental and Health Sciences, Hokkaido University, North-12, West-7, Kita-ku, Sapporo, Hokkaido 060-0812, Japan.
| | - Kaoru Azumi
- Center for Environmental and Health Sciences, Hokkaido University, North-12, West-7, Kita-ku, Sapporo, Hokkaido 060-0812, Japan.
| | - Sachiko Kobayashi
- Center for Environmental and Health Sciences, Hokkaido University, North-12, West-7, Kita-ku, Sapporo, Hokkaido 060-0812, Japan.
| | - Houman Goudarzi
- Center for Environmental and Health Sciences, Hokkaido University, North-12, West-7, Kita-ku, Sapporo, Hokkaido 060-0812, Japan; Department of Respiratory Medicine, Hokkaido University Graduate School of Medicine, North-15, West-7, Kita-ku, Sapporo, Hokkaido 060-8638, Japan.
| | - Atsuko Araki
- Center for Environmental and Health Sciences, Hokkaido University, North-12, West-7, Kita-ku, Sapporo, Hokkaido 060-0812, Japan.
| | - Mayumi Ishizuka
- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University, North-18, West-9, Kita-ku, Sapporo, Hokkaido 060-0818, Japan.
| | - Takashi Todaka
- Kitakyushu Life Science Center, 1-4, Nakabaru-shinmachi, Tobata-ku, Kitakyushu, Fukuoka 804-0003, Japan.
| | - Jumboku Kajiwara
- Fukuoka Institute of Health and Environmental Sciences, Mukaizano 39, Dazaifu, Fukuoka 818-0135, Japan.
| | - Tsuguhide Hori
- Fukuoka Institute of Health and Environmental Sciences, Mukaizano 39, Dazaifu, Fukuoka 818-0135, Japan.
| | - Reiko Kishi
- Center for Environmental and Health Sciences, Hokkaido University, North-12, West-7, Kita-ku, Sapporo, Hokkaido 060-0812, Japan.
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Miyaso H, Sakurai K, Takase S, Eguchi A, Watanabe M, Fukuoka H, Mori C. The methylation levels of the H19 differentially methylated region in human umbilical cords reflect newborn parameters and changes by maternal environmental factors during early pregnancy. ENVIRONMENTAL RESEARCH 2017; 157:1-8. [PMID: 28500962 DOI: 10.1016/j.envres.2017.05.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 03/28/2017] [Accepted: 05/05/2017] [Indexed: 06/07/2023]
Abstract
H19 is a tumor-suppressor gene, and changes in the methylation of the H19-differential methylation region (H19-DMR) are related to human health. However, little is known about the factors that regulate the methylation levels of H19-DMR. Several recent studies have shown that maternal environmental factors during pregnancy, such as smoking, drinking, chemical exposure, and nutrient intake, can alter the methylation levels of several genes in fetal tissues. In this study, we examined the effects of maternal factors on changes in the methylation levels of H19-DMR in the human umbilical cord (UC), an extra-embryonic tissue. Participants from the Chiba study of Mother and Children's Health (C-MACH) were enrolled in this study. Genomic DNA was extracted from UC samples, and the methylation level of H19-DMR was evaluated by methylation-sensitive high resolution melting analysis. Individual maternal and paternal factors and clinical information for newborns at birth were examined using questionnaires prepared in the C-MACH study, a brief-type self-administered diet history questionnaire (BDHQ) during early pregnancy (gestational age of 12 weeks), and medical records. Univariate and multivariate logistic regression analyses indicated that reduced H19-DMR methylation (<50% methylation) in UC tissues was positively related to decreased head circumference in newborns [odds ratio (OR) =2.82; 95% confidence intervals (CI): 1.21-6.87; p=0.0183 and OR =2.51; 95% CI: 1.02-6.46; p=0.0499, respectively]. Moreover, multiple comparison test showed that H19-DMR methylation in UC tissues was significantly reduced in the low calorie group (intake of less than 1,000kcal/day; methylation level: 40.98%; 95% CI: 33.86-48.11) compared with that in the middle (1,000-1,999kcal/day; methylation level: 51.28%; 95% CI: 48.28-54.27) and high (≥2,000kcal/day; methylation level: 52.16%; 95% CI: 44.81-59.51) calorie groups (p=0.0054 and 0.047, respectively). In the subpopulations with low to moderate calorie intake (<2,000kcal/day), reduced H19-DMR methylation in UC tissues was significantly related to serum homocysteine concentration (OR =0.520; 95% CI: 0.285-0.875; p=0.019), maternal age (OR =1.22; 95% CI: 1.01-1.52; p=0.049), and serum folate levels (OR =0.917; 95% CI: 0.838-0.990; p=0.040). These data indicated that H19-DMR methylation levels in human UC tissues could be modulated by maternal factors during early pregnancy and may affect fetal and newborn growth.
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Affiliation(s)
- Hidenobu Miyaso
- Center for Preventive Medical Sciences, Chiba University, Chiba, Japan; Department of Bioenvironmental Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan; Department of Anatomy, Tokyo Medical University, Tokyo, Japan
| | - Kenichi Sakurai
- Center for Preventive Medical Sciences, Chiba University, Chiba, Japan
| | - Shunya Takase
- Department of Bioenvironmental Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Akifumi Eguchi
- Center for Preventive Medical Sciences, Chiba University, Chiba, Japan
| | - Masahiro Watanabe
- Center for Preventive Medical Sciences, Chiba University, Chiba, Japan
| | - Hideoki Fukuoka
- Comprehensive Research Organization, Waseda University, Tokyo, Japan
| | - Chisato Mori
- Center for Preventive Medical Sciences, Chiba University, Chiba, Japan; Department of Bioenvironmental Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan; Department of Anatomy, Tokyo Medical University, Tokyo, Japan.
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25
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Kobayashi S, Azumi K, Goudarzi H, Araki A, Miyashita C, Kobayashi S, Itoh S, Sasaki S, Ishizuka M, Nakazawa H, Ikeno T, Kishi R. Effects of prenatal perfluoroalkyl acid exposure on cord blood IGF2/H19 methylation and ponderal index: The Hokkaido Study. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2017; 27:251-259. [PMID: 27553991 DOI: 10.1038/jes.2016.50] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 07/12/2016] [Indexed: 05/18/2023]
Abstract
Prenatal exposure to perfluoroalkyl acids (PFAAs) influences fetal growth and long-term health. However, whether PFAAs affect offspring DNA methylation patterns to influence health outcomes is yet to be evaluated. Here, we assessed effect of prenatal PFAA exposure on cord blood insulin-like growth factor 2 (IGF2), H19, and long interspersed element 1 (LINE1) methylation and its associations with birth size. Mother-child pairs (N=177) from the Hokkaido Study on Environment and Children's Health were included in the study. Perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) levels in maternal serum were measured by liquid chromatography-tandem mass spectrometry. IGF2, H19, and LINE1 methylation in cord blood DNA was determined by pyrosequencing. After full adjustment in multiple linear regression models, IGF2 methylation showed a significant negative association with log-unit increase in PFOA (partial regression coefficient=-0.73; 95% confidence interval: -1.44 to -0.02). Mediation analysis suggested that reduced IGF2 methylation explained ~21% of the observed association between PFOA exposure and reduced ponderal index of the infant at birth. These results indicated that the effects of prenatal PFOA exposure could be mediated through DNA methylation. Further study will be required to determine the potential for long-term adverse health effects of reduced IGF2 methylation induced by PFOA exposure.
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Affiliation(s)
- Sachiko Kobayashi
- Center for Environmental and Health Sciences, Hokkaido University, Sapporo, Japan
| | - Kaoru Azumi
- Center for Environmental and Health Sciences, Hokkaido University, Sapporo, Japan
| | - Houman Goudarzi
- Center for Environmental and Health Sciences, Hokkaido University, Sapporo, Japan
| | - Atsuko Araki
- Center for Environmental and Health Sciences, Hokkaido University, Sapporo, Japan
| | - Chihiro Miyashita
- Center for Environmental and Health Sciences, Hokkaido University, Sapporo, Japan
| | - Sumitaka Kobayashi
- Center for Environmental and Health Sciences, Hokkaido University, Sapporo, Japan
| | - Sachiko Itoh
- Center for Environmental and Health Sciences, Hokkaido University, Sapporo, Japan
| | - Seiko Sasaki
- Department of Public Health Sciences, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Mayumi Ishizuka
- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
| | - Hiroyuki Nakazawa
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Hoshi University, Tokyo, Japan
| | - Tamiko Ikeno
- Center for Environmental and Health Sciences, Hokkaido University, Sapporo, Japan
| | - Reiko Kishi
- Center for Environmental and Health Sciences, Hokkaido University, Sapporo, Japan
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Mansell T, Saffery R. The end of the beginning: epigenetic variation in utero as a mediator of later human health and disease. Epigenomics 2017; 9:217-221. [DOI: 10.2217/epi-2017-0007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
- Toby Mansell
- Murdoch Childrens Research Institute, University of Melbourne, Parkville, Victoria, Australia
- Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia
| | - Richard Saffery
- Murdoch Childrens Research Institute, University of Melbourne, Parkville, Victoria, Australia
- Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia
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27
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The telomere attrition rate is not accelerated in women born small for gestational age: A birth cohort study. Gene 2017; 600:16-20. [DOI: 10.1016/j.gene.2016.11.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2016] [Revised: 10/24/2016] [Accepted: 11/15/2016] [Indexed: 12/12/2022]
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28
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Navarro E, Funtikova AN, Fíto M, Schröder H. Prenatal nutrition and the risk of adult obesity: Long-term effects of nutrition on epigenetic mechanisms regulating gene expression. J Nutr Biochem 2017; 39:1-14. [DOI: 10.1016/j.jnutbio.2016.03.012] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 03/23/2016] [Accepted: 03/27/2016] [Indexed: 12/19/2022]
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Perinatal high methyl donor alters gene expression in IGF system in male offspring without altering DNA methylation. Future Sci OA 2016; 3:FSO164. [PMID: 28344827 PMCID: PMC5351714 DOI: 10.4155/fsoa-2016-0077] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 11/15/2016] [Indexed: 01/08/2023] Open
Abstract
Aim: To investigate the effect of a protein restriction and a supplementation with methyl donor nutrients during fetal and early postnatal life on the expression and epigenetic state of imprinted genes from the IGF system. Materials & methods: Pregnant female rats were fed a protein-restricted diet supplemented or not with methyl donor. Results: Gene expression of the Igf2, H19, Igf1, Igf2r and Plagl1 genes in the liver of male offspring at birth and weaning was strongly influenced by maternal diet. Whereas the methylation profiles of the Igf2, H19 and Igf2r genes were remarkably stable, DNA methylation of Plagl1 promoter was slightly modified. Conclusion: DNA methylation of most, but not all, imprinted gene regulatory regions was resistant to methyl group nutritional supply. Fetal environment influences fetal growth and may confer a risk to develop metabolic diseases, possibly through alterations in the epigenetic state of the genome. Imprinted genes constitute a special class of genes that are crucial for the control of fetal and postnatal growth and are closely associated with energy metabolism. In addition, these genes are finely regulated by epigenetic mechanisms that are themselves influenced by environmental factors. This study showed that methyl donor nutrients in maternal diet strongly influenced the expression level of imprinted genes in the liver of rat offspring, despite a mild effect on epigenetic regulation.
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Nagarajan S, Seddighzadeh B, Baccarelli A, Wise LA, Williams M, Shields AE. Adverse maternal exposures, methylation of glucocorticoid-related genes and perinatal outcomes: a systematic review. Epigenomics 2016; 8:925-44. [DOI: 10.2217/epi.16.9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Aim: Maternal environmental exposures affect perinatal outcomes through epigenetic placental changes. We examine the literature addressing associations between adverse maternal exposures, perinatal outcomes and methylation of key genes regulating placental cortisol metabolism. Methods: We searched three databases for studies that examined NR3C1 and HSD11β1/HSD11 β 2 methylation with maternal exposures or perinatal outcomes. Nineteen studies remained after screening. We followed Cochrane's PRISMA reporting guidelines (2009). Results: NR3C1 and HSD11 β methylation were associated with adverse infant neurobehavior, stress response, blood pressure and physical development. In utero exposure to maternal stress, nutrition, preeclampsia, smoking and diabetes were associated with altered NR3C1 and HSD11 β methylation. Conclusion: NR3C1 and HSD11 β methylation are useful biomarkers of specific environmental stressors associated with important perinatal outcomes that determine pediatric and adult disease risk.
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Affiliation(s)
- Sairaman Nagarajan
- Harvard/MGH Center on Genomics, Vulnerable Populations & Health Disparities, Mongan Institute for Health Policy, Massachusetts General Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA 02115, USA
| | - Bobak Seddighzadeh
- Harvard/MGH Center on Genomics, Vulnerable Populations & Health Disparities, Mongan Institute for Health Policy, Massachusetts General Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA 02115, USA
| | - Andrea Baccarelli
- Department of Epidemiology, Boston University School of Public Health, Boston, MA 02118, USA
| | - Lauren A Wise
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA
| | - Michelle Williams
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA
| | - Alexandra E Shields
- Harvard/MGH Center on Genomics, Vulnerable Populations & Health Disparities, Mongan Institute for Health Policy, Massachusetts General Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA 02115, USA
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31
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Linares J, Corvalán C, Galleguillos B, Kain J, González L, Uauy R, Garmendia ML, Mericq V. The effects of pre-pregnancy BMI and maternal factors on the timing of adiposity rebound in offspring. Obesity (Silver Spring) 2016; 24:1313-9. [PMID: 27086475 DOI: 10.1002/oby.21490] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Accepted: 01/06/2016] [Indexed: 12/21/2022]
Abstract
OBJECTIVE To assess the effect of pre-pregnancy body mass index (BMI), gestational weight gain (GWG), and other maternal factors on the timing of adiposity rebound (AR). METHODS In this study, 594 mothers (mothers who do not have diabetes and not underweight) from the longitudinal Growth and Obesity Chilean Cohort Study self-reported their weights at the beginning and end of their pregnancies, and their heights were measured. Pre-pregnancy BMI was categorized as normal weight, overweight, or obesity, and GWG was assessed according to Institute of Medicine guidelines. For children, weight and height measurements from 0 to 3 years were retrieved from records, and they were measured from age 4 to 7 years. BMI curves from 0 to 7 years were used to estimate the age at AR, which was categorized as early (<5 years), intermediate (5-7 years), or late (>7 years). The associations between pre-pregnancy BMI and GWG and early AR were tested using logistic regression models. RESULTS In total, 33% of the mothers had excess pre-pregnancy weight, 31.2% exceeded Institute of Medicine recommendations, and 45% of children had early AR. The pre-pregnancy BMI and parity were associated with earlier AR (OR = 1.07, 95% CI = 1.02-1.11; OR = 0.86; 95% CI = 0.74-0.99, respectively), but GWG was unrelated. CONCLUSIONS These results suggest that preventive strategies for promoting normal pre-pregnancy BMI, especially in women's first pregnancies, could delay the timing of AR, with protective metabolic effects on offspring.
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Affiliation(s)
- Jeannette Linares
- IDIMI, Institute of Maternal and Child Research, University of Chile, Santiago, Chile
| | - Camila Corvalán
- INTA, Institute of Nutrition and Food Technology, University of Chile, Santiago, Chile
| | - Bárbara Galleguillos
- INTA, Institute of Nutrition and Food Technology, University of Chile, Santiago, Chile
| | - Juliana Kain
- INTA, Institute of Nutrition and Food Technology, University of Chile, Santiago, Chile
| | - Laura González
- INTA, Institute of Nutrition and Food Technology, University of Chile, Santiago, Chile
| | - Ricardo Uauy
- INTA, Institute of Nutrition and Food Technology, University of Chile, Santiago, Chile
| | - María Luisa Garmendia
- INTA, Institute of Nutrition and Food Technology, University of Chile, Santiago, Chile
| | - Verónica Mericq
- IDIMI, Institute of Maternal and Child Research, University of Chile, Santiago, Chile
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32
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Qian YY, Huang XL, Liang H, Zhang ZF, Xu JH, Chen JP, Yuan W, He L, Wang L, Miao MH, Du J, Li DK. Effects of maternal folic acid supplementation on gene methylation and being small for gestational age. J Hum Nutr Diet 2016; 29:643-51. [PMID: 27230729 DOI: 10.1111/jhn.12369] [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] [Indexed: 01/18/2023]
Abstract
BACKGROUND Being small for gestational age (SGA), a foetal growth abnormality, has a long-lasting impact on childhood health. Its aetiology and underlying mechanisms are not well understood. Underlying epigenetic changes of imprinted genes have emerged as a potential pathological pathway because they may be associated with growth, including SGA. As a common methyl donor, folic acid (FA) is essential for DNA methylation, synthesis and repair, and FA supplementation is widely recommended for women planning pregnancy. The present study aimed to investigate the inter-relationships among methylation levels of two imprinted genes [H19 differentially methylated regions (DMRs) and MEST DMRs], maternal FA supplementation and SGA. METHODS We conducted a case-control study. Umbilical cord blood was taken from 39 SGA infants and 49 controls whose birth weights are appropriate for gestational age (AGA). DNA methylation levels of H19 and MEST DMRs were determined by an analysis of mass array quantitative methylation. RESULTS Statistically significantly higher methylation levels were observed at sites 7.8, 9 and 17.18 of H19 (P = 0.030, 0.016 and 0.050, respectively) in the SGA infants compared to the AGA group. In addition, the association was stronger in male births where the mothers took FA around conception at six H19 sites (P = 0.004, 0.005, 0.048, 0.002, 0.021 and 0.005, respectively). CONCLUSIONS Methylation levels at H19 DMRs were higher in SGA infants compared to AGA controls. It appears that the association may be influenced by maternal peri-conception FA supplementation and also be sex-specific.
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Affiliation(s)
- Y-Y Qian
- Shanghai Medical College of Fudan University, Shanghai, China.,Key Lab. of Reproduction Regulation of NPFPC, SIPPR, IRD, Fudan University, Shanghai, China
| | - X-L Huang
- Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
| | - H Liang
- Key Lab. of Reproduction Regulation of NPFPC, SIPPR, IRD, Fudan University, Shanghai, China
| | - Z-F Zhang
- Key Lab. of Reproduction Regulation of NPFPC, SIPPR, IRD, Fudan University, Shanghai, China
| | - J-H Xu
- Key Lab. of Reproduction Regulation of NPFPC, SIPPR, IRD, Fudan University, Shanghai, China
| | - J-P Chen
- Key Lab. of Reproduction Regulation of NPFPC, SIPPR, IRD, Fudan University, Shanghai, China
| | - W Yuan
- Key Lab. of Reproduction Regulation of NPFPC, SIPPR, IRD, Fudan University, Shanghai, China
| | - L He
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China
| | - L Wang
- State Key Laboratory of Genetic Engineering and MOE Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, China.,Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - M-H Miao
- Key Lab. of Reproduction Regulation of NPFPC, SIPPR, IRD, Fudan University, Shanghai, China.
| | - J Du
- Key Lab. of Reproduction Regulation of NPFPC, SIPPR, IRD, Fudan University, Shanghai, China.
| | - D-K Li
- Division of Research, Kaiser Permanente, Oakland, CA, USA
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33
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Li C, Wang X, Cai H, Fu Y, Luan Y, Wang W, Xiang H, Li C. Molecular microevolution and epigenetic patterns of the long non-coding gene H19 show its potential function in pig domestication and breed divergence. BMC Evol Biol 2016; 16:87. [PMID: 27107967 PMCID: PMC4841954 DOI: 10.1186/s12862-016-0657-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Accepted: 04/13/2016] [Indexed: 12/02/2022] Open
Abstract
Background The domestic pig Sus scrofa domesticus originated from the wild boar S. scrofa about 10,000 years ago. During domestication, drastic morphological, physiological, and behavioral changes developed between domestic pigs and wild boars through artificial and natural selection. The long non-coding RNA (lncRNA) H19, which is located within the imprinting gene cluster H19-IGF2, plays an important role in regulating muscle development in humans and mice. This study systematically analyzed the molecular evolution of H19 and its possible epigenetic changes during pig domestication and breeding to explore the genetic and epigenetic contributions of H19 to pig domestication. Results The molecular evolution of H19 was initially analyzed on a large phylogenetic scale. Results showed that the gene was highly conserved within a broad range, especially in the 5′ terminal sequence. The molecular evolution of the gene was then analyzed using published re-sequencing data of 30 wild boars from Tibet, 3 wild boars from Sichuan, and 15 native pigs from other regions in China. Eight polymorphic sites were identified, and the nucleotide diversity (π) value within the H19 gene body was significantly higher (Z-test, P < 0.05) in domesticated pigs than in wild pigs. However, no significant divergence occurred between domesticated and wild pigs. Single nucleotide polymorphisms in the 3′ terminal sequence were surveyed in other Chinese local breeds and foreign pig breeds. We observed a consistently higher diversity in domesticated pigs than in wild pigs. The methylation pattern of the H19 gene in pigs was subsequently analyzed using published methylated DNA immunoprecipitation data and an unpublished single-base resolution liver methylome. Analysis results showed distinct methylation levels in some tissues. Among the samples surveyed, Landrace showed the lowest methylation level, followed by the Guizhou wild boar, whereas the Enshi pig exhibited the highest methylation level in the 2 kb upstream region of the H19 gene. Liver transcriptome data suggested that Landrace harbored the highest expression of the H19 gene, followed by the Guizhou wild boar, whereas the Enshi pig harbored the lowest expression of the gene. Differential methylation sites (DMSs) among the three breeds were mainly identified in the 2 kb upstream region of the H19 gene. In the Enshi pig, we detected allele-specific methylation (ASM) regions in the 2 kb upstream region of the H19 gene. Most of the DMSs in the upstream 2 kb region of the gene were also located in the ASM region in this breed. Conclusions Molecular analyses suggest that the H19 gene was highly conserved during large-scale evolution and exhibited genotype differentiation during domestication and breed differentiation. The drastic diversity pattern between domestic and wild pigs in the H19 gene body, which was highly conserved during large-scale evolution, suggests that this gene might have played roles in the breed differentiation of domestic pigs. Methylation analysis indicates an opposite epigenetic regulation direction between Chinese and European pig (EU) domestication, which resulted in opposite expression changes in this gene between the two domesticated groups. Our preliminary analyses on DMSs among different pig breeds and ASM imply that imprinting was associated with methylation differences. This study systematically demonstrates the genetic and epigenetic patterns of H19 during pig domestication and provide valuable cues and basis for further research on the function of H19 in pig domestication. Electronic supplementary material The online version of this article (doi:10.1186/s12862-016-0657-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Cencen Li
- Key Lab of Agriculture Animal Genetics, Breeding, and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Xiao Wang
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, 32 East Jiaochang Road, Kunming, Yunnan Province, 65022, China.,Graduate School of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Huimin Cai
- Department of Computer Science, City University of Hong Kong, Hong Kong, 999077, China.,BGI Co Ltd, Shenzhen, 518083, China
| | - Yuhua Fu
- Key Lab of Agriculture Animal Genetics, Breeding, and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Yu Luan
- Key Lab of Agriculture Animal Genetics, Breeding, and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Wen Wang
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, 32 East Jiaochang Road, Kunming, Yunnan Province, 65022, China.,Graduate School of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Hui Xiang
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, 32 East Jiaochang Road, Kunming, Yunnan Province, 65022, China. .,Graduate School of the Chinese Academy of Sciences, Beijing, 100049, China. .,South China Normal University, Guangzhou, 510631, China.
| | - Changchun Li
- Key Lab of Agriculture Animal Genetics, Breeding, and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China.
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34
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Mansell T, Novakovic B, Meyer B, Rzehak P, Vuillermin P, Ponsonby AL, Collier F, Burgner D, Saffery R, Ryan J. The effects of maternal anxiety during pregnancy on IGF2/H19 methylation in cord blood. Transl Psychiatry 2016; 6:e765. [PMID: 27023171 PMCID: PMC4872456 DOI: 10.1038/tp.2016.32] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 02/01/2016] [Accepted: 02/04/2016] [Indexed: 12/17/2022] Open
Abstract
Compelling evidence suggests that maternal mental health in pregnancy can influence fetal development. The imprinted genes, insulin-like growth factor 2 (IGF2) and H19, are involved in fetal growth and each is regulated by DNA methylation. This study aimed to determine the association between maternal mental well-being during pregnancy and differentially methylated regions (DMRs) of IGF2 (DMR0) and the IGF2/H19 imprinting control region (ICR) in newborn offspring. Maternal depression, anxiety and perceived stress were assessed at 28 weeks of pregnancy in the Barwon Infant Study (n=576). DNA methylation was measured in purified cord blood mononuclear cells using the Sequenom MassArray Platform. Maternal anxiety was associated with a decrease in average ICR methylation (Δ=-2.23%; 95% CI=-3.68 to -0.77%), and across all six of the individual CpG units in anxious compared with non-anxious groups. Birth weight and sex modified the association between prenatal anxiety and infant methylation. When stratified into lower (⩽3530 g) and higher (>3530 g) birth weight groups using the median birth weight, there was a stronger association between anxiety and ICR methylation in the lower birth weight group (Δ=-3.89%; 95% CI=-6.06 to -1.72%), with no association in the higher birth weight group. When stratified by infant sex, there was a stronger association in female infants (Δ=-3.70%; 95% CI=-5.90 to -1.51%) and no association in males. All the linear regression models were adjusted for maternal age, smoking and folate intake. These findings show that maternal anxiety in pregnancy is associated with decreased IGF2/H19 ICR DNA methylation in progeny at birth, particularly in female, low birth weight neonates. ICR methylation may help link poor maternal mental health and adverse birth outcomes, but further investigation is needed.
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Affiliation(s)
- T Mansell
- Cancer & Disease Epigenetics, Murdoch Childrens Research Institute, Royal Childrens Hospital, Parkville, VIC, Australia,Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia
| | - B Novakovic
- Cancer & Disease Epigenetics, Murdoch Childrens Research Institute, Royal Childrens Hospital, Parkville, VIC, Australia,Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia
| | - B Meyer
- Cancer & Disease Epigenetics, Murdoch Childrens Research Institute, Royal Childrens Hospital, Parkville, VIC, Australia,Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia
| | - P Rzehak
- Cancer & Disease Epigenetics, Murdoch Childrens Research Institute, Royal Childrens Hospital, Parkville, VIC, Australia,Ludwig-Maximilians-University of Munich, Division of Metabolic and Nutritional Medicine, Dr. von Hauner Children's Hospital, University of Munich Medical Centre, Munich, Germany
| | - P Vuillermin
- Cancer & Disease Epigenetics, Murdoch Childrens Research Institute, Royal Childrens Hospital, Parkville, VIC, Australia,Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia,Child Health Research Unit, Barwon Health, Geelong, VIC, Australia,School of Medicine, Deakin University, Geelong, VIC, Australia
| | - A-L Ponsonby
- Cancer & Disease Epigenetics, Murdoch Childrens Research Institute, Royal Childrens Hospital, Parkville, VIC, Australia,Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia
| | - F Collier
- Child Health Research Unit, Barwon Health, Geelong, VIC, Australia,School of Medicine, Deakin University, Geelong, VIC, Australia
| | - D Burgner
- Cancer & Disease Epigenetics, Murdoch Childrens Research Institute, Royal Childrens Hospital, Parkville, VIC, Australia,Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia
| | - R Saffery
- Cancer & Disease Epigenetics, Murdoch Childrens Research Institute, Royal Childrens Hospital, Parkville, VIC, Australia,Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia
| | - J Ryan
- Cancer & Disease Epigenetics, Murdoch Childrens Research Institute, Royal Childrens Hospital, Parkville, VIC, Australia,Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia,Inserm U1061, Hopital La Colombiere, Universite Montpellier, Montpellier, France,Department of Epidemiology and Preventative Medicine, School of Public Health and Preventative Medicine, Monash University, Prahran, VIC, Australia,Murdoch Childrens Research Institute, Royal Children's Hospital, Flemington Road, Parkville, VIC 3052, Australia. E-mail:
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35
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van Mil NH, Bouwland-Both MI, Stolk L, Verbiest MMPJ, Hofman A, Jaddoe VWV, Verhulst FC, Eilers PHC, Uitterlinden AG, Steegers EAP, Tiemeier H, Steegers-Theunissen RPM. Determinants of maternal pregnancy one-carbon metabolism and newborn human DNA methylation profiles. Reproduction 2015; 148:581-92. [PMID: 25392189 DOI: 10.1530/rep-14-0260] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Maternal one-carbon (1-C) metabolism provides methylgroups for fetal development and programing by DNA methylation as one of the underlying epigenetic mechanisms. We aimed to investigate maternal 1-C biomarkers, folic acid supplement use, and MTHFR C677T genotype as determinants of 1-C metabolism in early pregnancy in association with newborn DNA methylation levels of fetal growth and neurodevelopment candidate genes. The participants were 463 mother-child pairs of Dutch national origin from a large population-based birth cohort in Rotterdam, The Netherlands. In early pregnancy (median 13.0 weeks, 90% range 10.4-17.1), we assessed the maternal folate and homocysteine blood concentrations, folic acid supplement use, and the MTHFR C677T genotype in mothers and newborns. In newborns, DNA methylation was measured in umbilical cord blood white blood cells at 11 regions of the seven genes: NR3C1, DRD4, 5-HTT, IGF2DMR, H19, KCNQ1OT1, and MTHFR. The associations between the 1-C determinants and DNA methylation were examined using linear mixed models. An association was observed between maternal folate deficiency and lower newborn DNA methylation, which attenuated after adjustment for potential confounders. The maternal MTHFR TT genotype was significantly associated with lower DNA methylation. However, maternal homocysteine and folate concentrations, folic acid supplement use, and the MTHFR genotype in the newborn were not associated with newborn DNA methylation. The maternal MTHFR C677T genotype, as a determinant of folate status and 1-C metabolism, is associated with variations in the epigenome of a selection of genes in newborns. Research on the implications of these variations in methylation on gene expression and health is recommended.
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Affiliation(s)
- Nina H van Mil
- The Generation R Study GroupDepartment of Child and Adolescent PsychiatryDepartment of Obstetrics and GynecologyDepartment of Internal MedicineDepartment of EpidemiologyDepartment of PaediatricsDepartment of BiostatisticsDepartment of PsychiatryErasmus MC, University Medical Centre Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands The Generation R Study GroupDepartment of Child and Adolescent PsychiatryDepartment of Obstetrics and GynecologyDepartment of Internal MedicineDepartment of EpidemiologyDepartment of PaediatricsDepartment of BiostatisticsDepartment of PsychiatryErasmus MC, University Medical Centre Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands The Generation R Study GroupDepartment of Child and Adolescent PsychiatryDepartment of Obstetrics and GynecologyDepartment of Internal MedicineDepartment of EpidemiologyDepartment of PaediatricsDepartment of BiostatisticsDepartment of PsychiatryErasmus MC, University Medical Centre Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
| | - Marieke I Bouwland-Both
- The Generation R Study GroupDepartment of Child and Adolescent PsychiatryDepartment of Obstetrics and GynecologyDepartment of Internal MedicineDepartment of EpidemiologyDepartment of PaediatricsDepartment of BiostatisticsDepartment of PsychiatryErasmus MC, University Medical Centre Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands The Generation R Study GroupDepartment of Child and Adolescent PsychiatryDepartment of Obstetrics and GynecologyDepartment of Internal MedicineDepartment of EpidemiologyDepartment of PaediatricsDepartment of BiostatisticsDepartment of PsychiatryErasmus MC, University Medical Centre Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
| | - Lisette Stolk
- The Generation R Study GroupDepartment of Child and Adolescent PsychiatryDepartment of Obstetrics and GynecologyDepartment of Internal MedicineDepartment of EpidemiologyDepartment of PaediatricsDepartment of BiostatisticsDepartment of PsychiatryErasmus MC, University Medical Centre Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
| | - Michael M P J Verbiest
- The Generation R Study GroupDepartment of Child and Adolescent PsychiatryDepartment of Obstetrics and GynecologyDepartment of Internal MedicineDepartment of EpidemiologyDepartment of PaediatricsDepartment of BiostatisticsDepartment of PsychiatryErasmus MC, University Medical Centre Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
| | - Albert Hofman
- The Generation R Study GroupDepartment of Child and Adolescent PsychiatryDepartment of Obstetrics and GynecologyDepartment of Internal MedicineDepartment of EpidemiologyDepartment of PaediatricsDepartment of BiostatisticsDepartment of PsychiatryErasmus MC, University Medical Centre Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
| | - Vincent W V Jaddoe
- The Generation R Study GroupDepartment of Child and Adolescent PsychiatryDepartment of Obstetrics and GynecologyDepartment of Internal MedicineDepartment of EpidemiologyDepartment of PaediatricsDepartment of BiostatisticsDepartment of PsychiatryErasmus MC, University Medical Centre Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands The Generation R Study GroupDepartment of Child and Adolescent PsychiatryDepartment of Obstetrics and GynecologyDepartment of Internal MedicineDepartment of EpidemiologyDepartment of PaediatricsDepartment of BiostatisticsDepartment of PsychiatryErasmus MC, University Medical Centre Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands The Generation R Study GroupDepartment of Child and Adolescent PsychiatryDepartment of Obstetrics and GynecologyDepartment of Internal MedicineDepartment of EpidemiologyDepartment of PaediatricsDepartment of BiostatisticsDepartment of PsychiatryErasmus MC, University Medical Centre Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
| | - Frank C Verhulst
- The Generation R Study GroupDepartment of Child and Adolescent PsychiatryDepartment of Obstetrics and GynecologyDepartment of Internal MedicineDepartment of EpidemiologyDepartment of PaediatricsDepartment of BiostatisticsDepartment of PsychiatryErasmus MC, University Medical Centre Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
| | - Paul H C Eilers
- The Generation R Study GroupDepartment of Child and Adolescent PsychiatryDepartment of Obstetrics and GynecologyDepartment of Internal MedicineDepartment of EpidemiologyDepartment of PaediatricsDepartment of BiostatisticsDepartment of PsychiatryErasmus MC, University Medical Centre Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
| | - Andre G Uitterlinden
- The Generation R Study GroupDepartment of Child and Adolescent PsychiatryDepartment of Obstetrics and GynecologyDepartment of Internal MedicineDepartment of EpidemiologyDepartment of PaediatricsDepartment of BiostatisticsDepartment of PsychiatryErasmus MC, University Medical Centre Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands The Generation R Study GroupDepartment of Child and Adolescent PsychiatryDepartment of Obstetrics and GynecologyDepartment of Internal MedicineDepartment of EpidemiologyDepartment of PaediatricsDepartment of BiostatisticsDepartment of PsychiatryErasmus MC, University Medical Centre Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
| | - Eric A P Steegers
- The Generation R Study GroupDepartment of Child and Adolescent PsychiatryDepartment of Obstetrics and GynecologyDepartment of Internal MedicineDepartment of EpidemiologyDepartment of PaediatricsDepartment of BiostatisticsDepartment of PsychiatryErasmus MC, University Medical Centre Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
| | - Henning Tiemeier
- The Generation R Study GroupDepartment of Child and Adolescent PsychiatryDepartment of Obstetrics and GynecologyDepartment of Internal MedicineDepartment of EpidemiologyDepartment of PaediatricsDepartment of BiostatisticsDepartment of PsychiatryErasmus MC, University Medical Centre Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands The Generation R Study GroupDepartment of Child and Adolescent PsychiatryDepartment of Obstetrics and GynecologyDepartment of Internal MedicineDepartment of EpidemiologyDepartment of PaediatricsDepartment of BiostatisticsDepartment of PsychiatryErasmus MC, University Medical Centre Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands The Generation R Study GroupDepartment of Child and Adolescent PsychiatryDepartment of Obstetrics and GynecologyDepartment of Internal MedicineDepartment of EpidemiologyDepartment of PaediatricsDepartment of BiostatisticsDepartment of PsychiatryErasmus MC, University Medical Centre Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
| | - Régine P M Steegers-Theunissen
- The Generation R Study GroupDepartment of Child and Adolescent PsychiatryDepartment of Obstetrics and GynecologyDepartment of Internal MedicineDepartment of EpidemiologyDepartment of PaediatricsDepartment of BiostatisticsDepartment of PsychiatryErasmus MC, University Medical Centre Rotterdam, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
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36
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Koning IV, Groenenberg IAL, Gotink AW, Willemsen SP, Gijtenbeek M, Dudink J, Go ATJI, Reiss IKM, Steegers EAP, Steegers-Theunissen RPM. Periconception Maternal Folate Status and Human Embryonic Cerebellum Growth Trajectories: The Rotterdam Predict Study. PLoS One 2015; 10:e0141089. [PMID: 26491876 PMCID: PMC4619586 DOI: 10.1371/journal.pone.0141089] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 10/03/2015] [Indexed: 01/21/2023] Open
Abstract
We aimed to investigate whether periconceptional maternal folate status affects human embryonic cerebellar size and growth trajectories. In a prospective periconceptional cohort participants filled out questionnaires and received weekly transvaginal 3D-ultrasounds between 7+0 and 12+6 weeks gestational age (GA). Viable non-malformed singleton pregnancies were selected for cerebellar measurements; transcerebellar diameter, (TCD), left and right cerebellar diameters (LCD, RCD). Linear mixed models were performed to estimate associations between questionnaire data on the timing of maternal folic acid supplement initiation and longitudinal cerebellar measurements as a function of crown-rump length (CRL) and GA. Maternal red blood cell folate concentrations were analysed before 8 weeks GA to validate the associations. A total of 263 serial high quality three-dimensional ultrasound scans of 135 pregnancies were studied. Preconceptional compared to postconceptional initiation of folic acid use was associated with slightly larger cerebellar diameters per millimetre increase of CRL (TCD: β = 0.260mm, 95%CI = 0.023-0.491, p<0.05; LCD: β = 0.171mm, 95%CI = 0.038-0.305, p<0.05; RCD: β = 0.156mm, 95%CI = 0.032-0.280, p<0.05) and with proportional cerebellar growth (TCD/CRL:β = 0.015mm/mm, 95%CI = 0.005-0.024, p<0.01; LCD/CRL:β = 0.012mm/mm, 95%CI = 0.005-0.018, p<0.01; RCD/CRL:β = 0.011mm/mm, 95%CI = 0.005-0.017, p<0.01). Cerebellar growth was significantly highest in the third quartile of maternal red blood cell folate levels (1538-1813 nmol/L). These first findings show that periconceptional maternal folate status is associated with human embryonic cerebellar development. Implications of these small but significant variations for fetal cerebellar growth trajectories and the child's neurodevelopmental outcome are yet unknown and warrant further investigation.
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Affiliation(s)
- Irene V. Koning
- Department of Obstetrics and Gynaecology, Erasmus University Medical Center, Rotterdam, the Netherlands
- Department of Paediatrics, subdivision of Neonatology, Sophia Children’s Hospital, Rotterdam, the Netherlands
| | - Irene A. L. Groenenberg
- Department of Obstetrics and Gynaecology, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Anniek W. Gotink
- Department of Obstetrics and Gynaecology, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Sten P. Willemsen
- Department of Obstetrics and Gynaecology, Erasmus University Medical Center, Rotterdam, the Netherlands
- Department of Biostatistics, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Manon Gijtenbeek
- Department of Obstetrics and Gynaecology, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Jeroen Dudink
- Department of Paediatrics, subdivision of Neonatology, Sophia Children’s Hospital, Rotterdam, the Netherlands
- Department of Radiology, Sophia Children’s Hospital, Rotterdam, the Netherlands
| | - Attie T. J. I. Go
- Department of Obstetrics and Gynaecology, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Irwin K. M. Reiss
- Department of Paediatrics, subdivision of Neonatology, Sophia Children’s Hospital, Rotterdam, the Netherlands
| | - Eric A. P. Steegers
- Department of Obstetrics and Gynaecology, Erasmus University Medical Center, Rotterdam, the Netherlands
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Vangeel EB, Izzi B, Hompes T, Vansteelandt K, Lambrechts D, Freson K, Claes S. DNA methylation in imprinted genesIGF2andGNASXLis associated with prenatal maternal stress. GENES BRAIN AND BEHAVIOR 2015; 14:573-82. [DOI: 10.1111/gbb.12249] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Revised: 08/12/2015] [Accepted: 08/21/2015] [Indexed: 12/30/2022]
Affiliation(s)
- E. B. Vangeel
- Genetic Research about Stress and Psychiatry (GRASP), Department of Neurosciences; Leuven Belgium
- Center for Molecular and Vascular Biology (CMVB), Department of Cardiovascular Sciences; University of Leuven; Leuven Belgium
| | - B. Izzi
- Center for Molecular and Vascular Biology (CMVB), Department of Cardiovascular Sciences; University of Leuven; Leuven Belgium
| | - T. Hompes
- Genetic Research about Stress and Psychiatry (GRASP), Department of Neurosciences; Leuven Belgium
- University Psychiatric Center, University of Leuven; Leuven Belgium
| | - K. Vansteelandt
- University Psychiatric Center, University of Leuven; Leuven Belgium
| | - D. Lambrechts
- Laboratory of Translational Genetics, Department of Oncology; University of Leuven; Leuven Belgium
- Vesalius Research Center (VRC), VIB; Leuven Belgium
| | - K. Freson
- Center for Molecular and Vascular Biology (CMVB), Department of Cardiovascular Sciences; University of Leuven; Leuven Belgium
| | - S. Claes
- Genetic Research about Stress and Psychiatry (GRASP), Department of Neurosciences; Leuven Belgium
- University Psychiatric Center, University of Leuven; Leuven Belgium
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Bouwland-Both MI, van Mil NH, Tolhoek CP, Stolk L, Eilers PHC, Verbiest MMPJ, Heijmans BT, Uitterlinden AG, Hofman A, van Ijzendoorn MH, Duijts L, de Jongste JC, Tiemeier H, Steegers EAP, Jaddoe VWV, Steegers-Theunissen RPM. Prenatal parental tobacco smoking, gene specific DNA methylation, and newborns size: the Generation R study. Clin Epigenetics 2015; 7:83. [PMID: 26265957 PMCID: PMC4531498 DOI: 10.1186/s13148-015-0115-z] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2015] [Accepted: 07/20/2015] [Indexed: 11/10/2022] Open
Abstract
Background Deleterious effects of prenatal tobacco smoking on fetal growth and newborn weight are well-established. One of the proposed mechanisms underlying this relationship is alterations in epigenetic programming. We selected 506 newborns from a population-based prospective birth cohort in the Netherlands. Prenatal parental tobacco smoking was assessed using self-reporting questionnaires. Information on birth outcomes was obtained from medical records. The deoxyribonucleic acid (DNA) methylation of the growth genes IGF2DMR and H19 was measured in newborn umbilical cord white blood cells. Associations were assessed between parental tobacco smoking and DNA methylation using linear mixed models and adjusted for potential confounders. Results The DNA methylation levels of IGF2DMR and H19 in the non-smoking group were median (90 % range), 54.0 % (44.6–62.0), and 30.0 % (25.5–34.0), in the first trimester only smoking group 52.2 % (44.5–61.1) and 30.8 % (27.1–34.1), and in the continued smoking group 51.6 % (43.9–61.3) and 30.2 % (23.7–34.8), respectively. Continued prenatal maternal smoking was inversely associated with IGF2DMR methylation (β = −1.03, 95 % CI −1.76; −0.30) in a dose-dependent manner (P-trend = 0.030). This association seemed to be slightly more profound among newborn girls (β = −1.38, 95 % CI −2.63; −0.14) than boys (β = −0.72, 95 % CI −1.68; 0.24). H19 methylation was also inversely associated continued smoking <5 cigarettes/day (β = −0.96, 95 % CI −1.78; −0.14). Moreover, the association between maternal smoking and newborns small for gestational age seems to be partially explained by IGF2DMR methylation (β = −0.095, 95 % CI −0.249; −0.018). Among non-smoking mothers, paternal tobacco smoking was not associated with IGF2DMR or H19 methylation. Conclusions Maternal smoking is inversely associated with IGF2DMR methylation in newborns, which can be one of the underlying mechanisms through which smoking affects fetal growth. Electronic supplementary material The online version of this article (doi:10.1186/s13148-015-0115-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Marieke I Bouwland-Both
- The Generation R Study Group, Erasmus MC, University Medical Centre Rotterdam, Rotterdam, The Netherlands ; Department of Obstetrics and Gynecology, Erasmus MC, University Medical Centre, Ee-building Room 2271a, PO Box 1738, 3000 DR Rotterdam, The Netherlands
| | - Nina H van Mil
- The Generation R Study Group, Erasmus MC, University Medical Centre Rotterdam, Rotterdam, The Netherlands ; Department of Obstetrics and Gynecology, Erasmus MC, University Medical Centre, Ee-building Room 2271a, PO Box 1738, 3000 DR Rotterdam, The Netherlands ; Department of Child and Adolescent Psychiatry/Psychology, Erasmus MC, University Medical Centre, Rotterdam, The Netherlands
| | - Catharina P Tolhoek
- The Generation R Study Group, Erasmus MC, University Medical Centre Rotterdam, Rotterdam, The Netherlands ; Department of Obstetrics and Gynecology, Erasmus MC, University Medical Centre, Ee-building Room 2271a, PO Box 1738, 3000 DR Rotterdam, The Netherlands
| | - Lisette Stolk
- Department of Internal Medicine, Erasmus MC, University Medical Centre, Rotterdam, The Netherlands
| | - Paul H C Eilers
- Department of Biostatistics, Erasmus MC, University Medical Centre, Rotterdam, The Netherlands
| | - Michael M P J Verbiest
- Department of Internal Medicine, Erasmus MC, University Medical Centre, Rotterdam, The Netherlands
| | - Bastiaan T Heijmans
- Department of Molecular Epidemiology, Leiden University Medical Centre, Leiden, The Netherlands
| | - André G Uitterlinden
- Department of Internal Medicine, Erasmus MC, University Medical Centre, Rotterdam, The Netherlands ; Department of Epidemiology, Erasmus MC, University Medical Centre, Rotterdam, The Netherlands
| | - Albert Hofman
- Department of Epidemiology, Erasmus MC, University Medical Centre, Rotterdam, The Netherlands
| | - Marinus H van Ijzendoorn
- School for Pedagogical and Educational Sciences, Erasmus MC, University Medical Centre, Rotterdam, The Netherlands
| | - Liesbeth Duijts
- Department of Epidemiology, Erasmus MC, University Medical Centre, Rotterdam, The Netherlands ; Department of Pediatrics, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Johan C de Jongste
- Department of Pediatrics, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Henning Tiemeier
- Department of Child and Adolescent Psychiatry/Psychology, Erasmus MC, University Medical Centre, Rotterdam, The Netherlands ; Department of Epidemiology, Erasmus MC, University Medical Centre, Rotterdam, The Netherlands
| | - Eric A P Steegers
- Department of Obstetrics and Gynecology, Erasmus MC, University Medical Centre, Ee-building Room 2271a, PO Box 1738, 3000 DR Rotterdam, The Netherlands
| | - Vincent W V Jaddoe
- The Generation R Study Group, Erasmus MC, University Medical Centre Rotterdam, Rotterdam, The Netherlands ; Department of Epidemiology, Erasmus MC, University Medical Centre, Rotterdam, The Netherlands
| | - Régine P M Steegers-Theunissen
- Department of Obstetrics and Gynecology, Erasmus MC, University Medical Centre, Ee-building Room 2271a, PO Box 1738, 3000 DR Rotterdam, The Netherlands
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Demetriou CA, van Veldhoven K, Relton C, Stringhini S, Kyriacou K, Vineis P. Biological embedding of early-life exposures and disease risk in humans: a role for DNA methylation. Eur J Clin Invest 2015; 45:303-32. [PMID: 25645488 DOI: 10.1111/eci.12406] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Accepted: 01/19/2015] [Indexed: 12/16/2022]
Abstract
BACKGROUND Following wider acceptance of 'the thrifty phenotype' hypothesis and the convincing evidence that early-life exposures can influence adult health even decades after the exposure, much interest has been placed on the mechanisms through which early-life exposures become biologically embedded. MATERIALS AND METHODS In this review, we summarize the current literature regarding biological embedding of early-life experiences. To this end, we conducted a literature search to identify studies investigating early-life exposures in relation to DNA methylation changes. In addition, we summarize the challenges faced in investigations of epigenetic effects, stemming from the peculiarities of this emergent and complex field. A proper systematic review and meta-analyses were not feasible given the nature of the evidence. RESULTS We identified seven studies on early-life socio-economic circumstances, 10 studies on childhood obesity and six studies on early-life nutrition all relating to DNA methylation changes that met the stipulated inclusion criteria. The pool of evidence gathered, albeit small, favours a role of epigenetics and DNA methylation in biological embedding, but replication of findings, multiple comparison corrections, publication bias and causality are concerns remaining to be addressed in future investigations. CONCLUSIONS Based on these results, we hypothesize that epigenetics, in particular DNA methylation, is a plausible mechanism through which early-life exposures are biologically embedded. This review describes the current status of the field and acts as a stepping stone for future, better designed investigations on how early-life exposures might become biologically embedded through epigenetic effects.
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Affiliation(s)
- Christiana A Demetriou
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK; Department of Electron Microscopy / Molecular Pathology, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
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Drake AJ, O'Shaughnessy PJ, Bhattacharya S, Monteiro A, Kerrigan D, Goetz S, Raab A, Rhind SM, Sinclair KD, Meharg AA, Feldmann J, Fowler PA. In utero exposure to cigarette chemicals induces sex-specific disruption of one-carbon metabolism and DNA methylation in the human fetal liver. BMC Med 2015; 13:18. [PMID: 25630355 PMCID: PMC4310040 DOI: 10.1186/s12916-014-0251-x] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Accepted: 12/09/2014] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Maternal smoking is one of the most important modifiable risk factors for low birthweight, which is strongly associated with increased cardiometabolic disease risk in adulthood. Maternal smoking reduces the levels of the methyl donor vitamin B12 and is associated with altered DNA methylation at birth. Altered DNA methylation may be an important mechanism underlying increased disease susceptibility; however, the extent to which this can be induced in the developing fetus is unknown. METHODS In this retrospective study, we measured concentrations of cobalt, vitamin B12, and mRNA transcripts encoding key enzymes in the 1-carbon cycle in 55 fetal human livers obtained from 11 to 21 weeks of gestation elective terminations and matched for gestation and maternal smoking. DNA methylation was measured at critical regions known to be susceptible to the in utero environment. Homocysteine concentrations were analyzed in plasma from 60 fetuses. RESULTS In addition to identifying baseline sex differences, we found that maternal smoking was associated with sex-specific alterations of fetal liver vitamin B12, plasma homocysteine and expression of enzymes in the 1-carbon cycle in fetal liver. In the majority of the measured parameters which showed a sex difference, maternal smoking reduced the magnitude of that difference. Maternal smoking also altered DNA methylation at the imprinted gene IGF2 and the glucocorticoid receptor (GR/NR3C1). CONCLUSIONS Our unique data strengthen studies linking in utero exposures to altered DNA methylation by showing, for the first time, that such changes are present in fetal life and in a key metabolic target tissue, human fetal liver. Furthermore, these data propose a novel mechanism by which such changes are induced, namely through alterations in methyl donor availability and changes in 1-carbon metabolism.
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Affiliation(s)
- Amanda J Drake
- Endocrinology Unit, University/BHF Centre for Cardiovascular Science, University of Edinburgh, Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh EH16 4TJ, UK.
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The Generation R Study: Biobank update 2015. Eur J Epidemiol 2014; 29:911-27. [PMID: 25527369 DOI: 10.1007/s10654-014-9980-6] [Citation(s) in RCA: 171] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2014] [Accepted: 12/06/2014] [Indexed: 12/14/2022]
Abstract
The Generation R Study is a population-based prospective cohort study from fetal life until adulthood. The study is designed to identify early environmental and genetic causes and causal pathways leading to normal and abnormal growth, development and health from fetal life, childhood and young adulthood. In total, 9,778 mothers were enrolled in the study. Data collection in children and their parents include questionnaires, interviews, detailed physical and ultrasound examinations, behavioural observations, Magnetic Resonance Imaging and biological samples. Efforts have been conducted for collecting biological samples including blood, hair, faeces, nasal swabs, saliva and urine samples and generating genomics data on DNA, RNA and microbiome. In this paper, we give an update of the collection, processing and storage of these biological samples and available measures. Together with detailed phenotype measurements, these biological samples provide a unique resource for epidemiological studies focused on environmental exposures, genetic and genomic determinants and their interactions in relation to growth, health and development from fetal life onwards.
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Falkner B, Ingelfinger J. Understanding the Power of Perinatal Events and Metabolic Status in Childhood. Hypertension 2014; 63:1166-7. [DOI: 10.1161/hypertensionaha.114.03290] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Bonita Falkner
- From the Department of Medicine and Pediatrics, Thomas Jefferson University, Philadelphia, PA (B.F.); and Pediatric Nephrology Unit, MassGeneral Hospital for Children at Massachusetts General for Children, Boston, MA (J.I.)
| | - Julie Ingelfinger
- From the Department of Medicine and Pediatrics, Thomas Jefferson University, Philadelphia, PA (B.F.); and Pediatric Nephrology Unit, MassGeneral Hospital for Children at Massachusetts General for Children, Boston, MA (J.I.)
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