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Xu X, Zhang Z, Lin Y, Xie H. Risk of Excess Maternal Folic Acid Supplementation in Offspring. Nutrients 2024; 16:755. [PMID: 38474883 DOI: 10.3390/nu16050755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Revised: 03/04/2024] [Accepted: 03/06/2024] [Indexed: 03/14/2024] Open
Abstract
Folate, also known as vitamin B9, facilitates the transfer of methyl groups among molecules, which is crucial for amino acid metabolism and nucleotide synthesis. Adequate maternal folate supplementation has been widely acknowledged for its pivotal role in promoting cell proliferation and preventing neural tube defects. However, in the post-fortification era, there has been a rising concern regarding an excess maternal intake of folic acid (FA), the synthetic form of folate. In this review, we focused on recent advancements in understanding the influence of excess maternal FA intake on offspring. For human studies, we summarized findings from clinical trials investigating the effects of periconceptional FA intake on neurodevelopment and molecular-level changes in offspring. For studies using mouse models, we compiled the impact of high maternal FA supplementation on gene expression and behavioral changes in offspring. In summary, excessive maternal folate intake could potentially have adverse effects on offspring. Overall, we highlighted concerns regarding elevated maternal folate status in the population, providing a comprehensive perspective on the potential adverse effects of excessive maternal FA supplementation on offspring.
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Affiliation(s)
- Xiguang Xu
- Epigenomics and Computational Biology Lab, Fralin Life Sciences Institute, Virginia Tech, Blacksburg, VA 24061, USA
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061, USA
| | - Ziyu Zhang
- Epigenomics and Computational Biology Lab, Fralin Life Sciences Institute, Virginia Tech, Blacksburg, VA 24061, USA
- Department of Human Development and Family Science, College of Liberal Arts and Human Sciences, Virginia Tech, Blacksburg, VA 24061, USA
| | - Yu Lin
- Epigenomics and Computational Biology Lab, Fralin Life Sciences Institute, Virginia Tech, Blacksburg, VA 24061, USA
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061, USA
- Genetics, Bioinformatics and Computational Biology Program, Virginia Tech, Blacksburg, VA 24061, USA
| | - Hehuang Xie
- Epigenomics and Computational Biology Lab, Fralin Life Sciences Institute, Virginia Tech, Blacksburg, VA 24061, USA
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061, USA
- Genetics, Bioinformatics and Computational Biology Program, Virginia Tech, Blacksburg, VA 24061, USA
- Translational Biology, Medicine, and Health Program, Virginia Tech, Blacksburg, VA 24061, USA
- School of Neuroscience, Virginia Tech, Blacksburg, VA 24061, USA
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Ren Y, Zeng Y, Wu Y, Zhang Q, Xiao X. Maternal methyl donor supplementation: A potential therapy for metabolic disorder in offspring. J Nutr Biochem 2024; 124:109533. [PMID: 37977406 DOI: 10.1016/j.jnutbio.2023.109533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 11/07/2023] [Accepted: 11/11/2023] [Indexed: 11/19/2023]
Abstract
The prevalences of diabetes mellitus and obesity are increasing yearly and has become a serious social burden. In addition to genetic factors, environmental factors in early life development are critical in influencing the prevalence of metabolic disorders in offspring. A growing body of evidence suggests the critical role of early methyl donor intervention in offspring health. Emerging studies have shown that methyl donors can influence offspring metabolism through epigenetic modifications and changing metabolism-related genes. In this review, we focus on the role of folic acid, betaine, vitamin B12, methionine, and choline in protecting against metabolic disorders in offspring. To address the current evidence on the potential role of maternal methyl donors, we summarize clinical studies as well as experimental animal models that support the impact of maternal methyl donors on offspring metabolism and discuss the mechanisms of action that may bring about these positive effects. Given the worldwide prevalence of metabolic disorders, these findings could be utilized in clinical practice, in which methyl donor supplementation in the early life years may reverse metabolic disorders in offspring and block the harmful intergenerational effect.
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Affiliation(s)
- Yaolin Ren
- Key Laboratory of Endocrinology, Ministry of Health, Department of Endocrinology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Yuan Zeng
- Key Laboratory of Endocrinology, Ministry of Health, Department of Endocrinology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Yifan Wu
- Key Laboratory of Endocrinology, Ministry of Health, Department of Endocrinology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Qian Zhang
- Key Laboratory of Endocrinology, Ministry of Health, Department of Endocrinology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China.
| | - Xinhua Xiao
- Key Laboratory of Endocrinology, Ministry of Health, Department of Endocrinology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China.
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Rhon-Calderon EA, Hemphill CN, Vrooman LA, Rosier CL, Lan Y, Ord T, Coutifaris C, Mainigi M, Schultz RM, Bartolomei MS. Trophectoderm biopsy of blastocysts following IVF and embryo culture increases epigenetic dysregulation in a mouse model. Hum Reprod 2024; 39:154-176. [PMID: 37994669 PMCID: PMC11032714 DOI: 10.1093/humrep/dead238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Revised: 10/29/2023] [Indexed: 11/24/2023] Open
Abstract
STUDY QUESTION Does trophectoderm biopsy (TEBx) of blastocysts for preimplantation genetic testing in the clinic affect normal placental and embryo development and offspring metabolic outcomes in a mouse model? SUMMARY ANSWER TEBx impacts placental and embryonic health during early development, with some alterations resolving and others worsening later in development and triggering metabolic changes in adult offspring. WHAT IS KNOWN ALREADY Previous studies have not assessed the epigenetic and morphological impacts of TEBx either in human populations or in animal models. STUDY DESIGN, SIZE, DURATION We employed a mouse model to identify the effects of TEBx during IVF. Three groups were assessed: naturally conceived (Naturals), IVF, and IVF + TEBx, at two developmental timepoints: embryonic day (E)12.5 (n = 40/Naturals, n = 36/IVF, and n = 36/IVF + TEBx) and E18.5 (n = 42/Naturals, n = 30/IVF, and n = 35/IVF + TEBx). Additionally, to mimic clinical practice, we assessed a fourth group: IVF + TEBx + Vitrification (Vit) at E12.5 (n = 29) that combines TEBx and vitrification. To assess the effect of TEBx in offspring health, we characterized a 12-week-old cohort (n = 24/Naturals, n = 25/IVF and n = 25/IVF + TEBx). PARTICIPANTS/MATERIALS, SETTING, METHODS Our mouse model used CF-1 females as egg donors and SJL/B6 males as sperm donors. IVF, TEBx, and vitrification were performed using standardized methods. Placenta morphology was evaluated by hematoxylin-eosin staining, in situ hybridization using Tpbpa as a junctional zone marker and immunohistochemistry using CD34 fetal endothelial cell markers. For molecular analysis of placentas and embryos, DNA methylation was analyzed using pyrosequencing, luminometric methylation assay, and chip array technology. Expression patterns were ascertained by RNA sequencing. Triglycerides, total cholesterol, high-, low-, and very low-density lipoprotein, insulin, and glucose were determined in the 12-week-old cohort using commercially available kits. MAIN RESULTS AND THE ROLE OF CHANCE We observed that at E12.5, IVF + TEBx had a worse outcome in terms of changes in DNA methylation and differential gene expression in placentas and whole embryos compared with IVF alone and compared with Naturals. These changes were reflected in alterations in placental morphology and blood vessel density. At E18.5, early molecular changes in fetuses were maintained or exacerbated. With respect to placentas, the molecular and morphological changes, although different compared to Naturals, were equivalent to the IVF group, except for changes in blood vessel density, which persisted. Of note is that most differences were sex specific. We conclude that TEBx has more detrimental effects in mid-gestation placental and embryonic tissues, with alterations in embryonic tissues persisting or worsening in later developmental stages compared to IVF alone, and the addition of vitrification after TEBx results in more pronounced and potentially detrimental epigenetic effects: these changes are significantly different compared to Naturals. Finally, we observed that 12-week IVF + TEBx offspring, regardless of sex, showed higher glucose, insulin, triglycerides, lower total cholesterol, and lower high-density lipoprotein compared to IVF and Naturals, with only males having higher body weight compared to IVF and Naturals. Our findings in a mouse model additionally support the need for more studies to assess the impact of new procedures in ART to ensure healthy pregnancies and offspring outcomes. LARGE SCALE DATA Data reported in this work have been deposited in the NCBI Gene Expression Omnibus under accession number GSE225318. LIMITATIONS, REASONS FOR CAUTION This study was performed using a mouse model that mimics many clinical IVF procedures and outcomes observed in humans, where studies on early embryos are not possible. WIDER IMPLICATIONS OF THE FINDINGS This study highlights the importance of assaying new procedures used in ART to assess their impact on placenta and embryo development, and offspring metabolic outcomes. STUDY FUNDING/COMPETING INTEREST(S) This work was funded by a National Centers for Translational Research in Reproduction and Infertility grant P50 HD068157-06A1 (M.S.B., C.C., M.M.), Ruth L. Kirschstein National Service Award Individual Postdoctoral Fellowship F32 HD107914 (E.A.R.-C.) and F32 HD089623 (L.A.V.), and National Institutes of Health Training program in Cell and Molecular Biology T32 GM007229 (C.N.H.). No conflict of interest.
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Affiliation(s)
- Eric A Rhon-Calderon
- Department of Cell and Developmental Biology, Epigenetics Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Cassidy N Hemphill
- Department of Cell and Developmental Biology, Epigenetics Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Lisa A Vrooman
- Department of Cell and Developmental Biology, Epigenetics Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Casey L Rosier
- Department of Cell and Developmental Biology, Epigenetics Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Yemin Lan
- Department of Cell and Developmental Biology, Epigenetics Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Teri Ord
- Center for Research on Reproduction and Women’s Health, University of Pennsylvania, Philadelphia, PA, USA
| | - Christos Coutifaris
- Center for Research on Reproduction and Women’s Health, University of Pennsylvania, Philadelphia, PA, USA
- Division of Reproductive Endocrinology and Infertility, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Monica Mainigi
- Center for Research on Reproduction and Women’s Health, University of Pennsylvania, Philadelphia, PA, USA
- Division of Reproductive Endocrinology and Infertility, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Richard M Schultz
- Department of Biology, School of Arts and Sciences, University of Pennsylvania, Philadelphia, PA, USA
- Department of Anatomy, Physiology, and Cell Biology, School of Veterinary Medicine, UC Davis, Davis, CA, USA
| | - Marisa S Bartolomei
- Department of Cell and Developmental Biology, Epigenetics Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Center for Research on Reproduction and Women’s Health, University of Pennsylvania, Philadelphia, PA, USA
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Karahan G, Martel J, Rahimi S, Farag M, Matias F, MacFarlane AJ, Chan D, Trasler J. Higher incidence of embryonic defects in mouse offspring conceived with assisted reproduction from fathers with sperm epimutations. Hum Mol Genet 2023; 33:48-63. [PMID: 37740387 PMCID: PMC10729866 DOI: 10.1093/hmg/ddad160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 08/30/2023] [Accepted: 09/13/2023] [Indexed: 09/24/2023] Open
Abstract
Assisted reproductive technologies (ART) account for 1-6% of births in developed countries. While most children conceived are healthy, increases in birth and genomic imprinting defects have been reported; such abnormal outcomes have been attributed to underlying parental infertility and/or the ART used. Here, we assessed whether paternal genetic and lifestyle factors, that are associated with male infertility and affect the sperm epigenome, can influence ART outcomes. We examined how paternal factors, haploinsufficiency for Dnmt3L, an important co-factor for DNA methylation reactions, and/or diet-induced obesity, in combination with ART (superovulation, in vitro fertilization, embryo culture and embryo transfer), could adversely influence embryo development and DNA methylation patterning in mice. While male mice fed high-fat diets (HFD) gained weight and showed perturbed metabolic health, their sperm DNA methylation was minimally affected by the diet. In contrast, Dnmt3L haploinsufficiency induced a marked loss of DNA methylation in sperm; notably, regions affected were associated with neurodevelopmental pathways and enriched in young retrotransposons, sequences that can have functional consequences in the next generation. Following ART, placental imprinted gene methylation and growth parameters were impacted by one or both paternal factors. For embryos conceived by natural conception, abnormality rates were similar for WT and Dnmt3L+/- fathers. In contrast, paternal Dnmt3L+/- genotype, as compared to WT fathers, resulted in a 3-fold increase in the incidence of morphological abnormalities in embryos generated by ART. Together, the results indicate that embryonic morphological and epigenetic defects associated with ART may be exacerbated in offspring conceived by fathers with sperm epimutations.
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Affiliation(s)
- Gurbet Karahan
- Department of Human Genetics, McGill University, Montreal, QC, H3A 0C7, Canada
- Research Institute of the McGill University Health Centre, Montreal, QC, H4A 3J1, Canada
| | - Josée Martel
- Research Institute of the McGill University Health Centre, Montreal, QC, H4A 3J1, Canada
| | - Sophia Rahimi
- Research Institute of the McGill University Health Centre, Montreal, QC, H4A 3J1, Canada
| | - Mena Farag
- Department of Human Genetics, McGill University, Montreal, QC, H3A 0C7, Canada
| | - Fernando Matias
- Nutrition Research Division, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | | | - Donovan Chan
- Research Institute of the McGill University Health Centre, Montreal, QC, H4A 3J1, Canada
| | - Jacquetta Trasler
- Department of Human Genetics, McGill University, Montreal, QC, H3A 0C7, Canada
- Research Institute of the McGill University Health Centre, Montreal, QC, H4A 3J1, Canada
- Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, H3G 1Y6, Canada
- Department of Pediatrics, McGill University Health Centre, Montreal, QC, H4A 3J1, Canada
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Kornfield MS, Gurley SB, Vrooman LA. Increased Risk of Preeclampsia with Assisted Reproductive Technologies. Curr Hypertens Rep 2023; 25:251-261. [PMID: 37303020 DOI: 10.1007/s11906-023-01250-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/19/2023] [Indexed: 06/13/2023]
Abstract
PURPOSE OF REVIEW We summarized recent available data to assess the association between assisted reproductive technology (ART) and risk for preeclampsia. RECENT FINDINGS The majority of clinical studies supporting the association of preeclampsia and ART are retrospective. Published data from both clinical and pre-clinical studies suggest specific ART procedures may contribute to the increased risk, including in vitro embryo handling and development, hormone stimulation, transfer cycle types, and use of donor oocytes/embryos. Potential mechanisms include epigenetic aberrations leading to abnormal placentation, absence of factors secreted by the corpus luteum, and immunologic responses to allogenic gametes. There is an increased risk of preeclampsia following ART. Treatment plans that favor reduced preeclampsia risk should be considered for ART pregnancies. To make ART pregnancies safer, additional clinical and animal model studies are needed to elucidate the underpinnings of this risk association.
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Affiliation(s)
- Molly S Kornfield
- Division of Reproductive Endocrinology & Infertility, Department of Obstetrics & Gynecology, Oregon Health & Science University, Portland, OR, USA
| | - Susan B Gurley
- Division of Nephrology & Hypertension, Department of Medicine, Oregon Health & Science University, Portland, OR, USA
| | - Lisa A Vrooman
- Division of Reproductive and Developmental Sciences, Oregon National Primate Research Center, Oregon Health & Science University, 505 NW 185th Ave, Beaverton, OR, USA.
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Liu H, Ou J, Chen Y, Chen Q, Luo M, Wang T, Qin J. Association of Maternal Folate Intake and Offspring MTHFD1 and MTHFD2 Genes with Congenital Heart Disease. Nutrients 2023; 15:3502. [PMID: 37630697 PMCID: PMC10458540 DOI: 10.3390/nu15163502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/27/2023] [Accepted: 08/07/2023] [Indexed: 08/27/2023] Open
Abstract
Existing evidence supported that congenital heart defect (CHD) was associated with a combination of environmental and genetic factors. Based on this, this study aimed at assessing the association of maternal folic acid supplementation (FAS), genetic variations in offspring methylenetetrahydrofolate dehydrogenase (MTHFD)1 and MTHFD2 genes, and their interactions with CHD and its subtypes. A hospital-based case-control study, including 620 cases with CHD and 620 healthy children, was conducted. This study showed that the absence of FAS was significantly associated with an increased risk of total CHD and its subtypes, such as atrial septal defect (ASD). FAS during the first and second trimesters was associated with a significantly higher risk of CHD in offspring compared to FAS during the three months prior to conception. The polymorphisms of offspring MTHFD1 and MTHFD2 genes at rs2236222, rs11849530, and rs828858 were significantly associated with the risk of CHD. Additionally, a significantly positive interaction between maternal FAS and genetic variation at rs828858 was observed for the risk of CHD. These findings suggested that pregnant women should carefully consider the timing of FAS, and individuals with higher genetic risk may benefit from targeted folic acid supplementation as a preventive measure against CHD.
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Affiliation(s)
- Hanjun Liu
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha 410078, China; (H.L.); (J.O.); (Y.C.); (Q.C.); (M.L.)
| | - Jun Ou
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha 410078, China; (H.L.); (J.O.); (Y.C.); (Q.C.); (M.L.)
| | - Yige Chen
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha 410078, China; (H.L.); (J.O.); (Y.C.); (Q.C.); (M.L.)
| | - Qian Chen
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha 410078, China; (H.L.); (J.O.); (Y.C.); (Q.C.); (M.L.)
| | - Manjun Luo
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha 410078, China; (H.L.); (J.O.); (Y.C.); (Q.C.); (M.L.)
| | - Tingting Wang
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha 410078, China; (H.L.); (J.O.); (Y.C.); (Q.C.); (M.L.)
| | - Jiabi Qin
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha 410078, China; (H.L.); (J.O.); (Y.C.); (Q.C.); (M.L.)
- National Health Committee Key Laboratory of Birth Defect for Research and Prevention, Hunan Provincial Maternal and Child Health Care Hospital, Changsha 410028, China
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Rahimi S, Shao X, Chan D, Martel J, Bérard A, Fraser WD, Simon MM, Kwan T, Bourque G, Trasler J. Capturing sex-specific and hypofertility-linked effects of assisted reproductive technologies on the cord blood DNA methylome. Clin Epigenetics 2023; 15:82. [PMID: 37170172 PMCID: PMC10176895 DOI: 10.1186/s13148-023-01497-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 05/02/2023] [Indexed: 05/13/2023] Open
Abstract
BACKGROUND Children conceived through assisted reproduction are at an increased risk for growth and genomic imprinting disorders, often linked to DNA methylation defects. It has been suggested that assisted reproductive technology (ART) and underlying parental infertility can induce epigenetic instability, specifically interfering with DNA methylation reprogramming events during germ cell and preimplantation development. To date, human studies exploring the association between ART and DNA methylation defects have reported inconsistent or inconclusive results, likely due to population heterogeneity and the use of technologies with limited coverage of the epigenome. In our study, we explored the epigenetic risk of ART by comprehensively profiling the DNA methylome of 73 human cord blood samples of singleton pregnancies (n = 36 control group, n = 37 ART/hypofertile group) from a human prospective longitudinal birth cohort, the 3D (Design, Develop, Discover) Study, using a high-resolution sequencing-based custom capture panel that examines over 2.4 million autosomal CpGs in the genome. RESULTS We identified evidence of sex-specific effects of ART/hypofertility on cord blood DNA methylation patterns. Our genome-wide analyses identified ~ 46% more CpGs affected by ART/hypofertility in female than in male infant cord blood. We performed a detailed analysis of three imprinted genes which have been associated with altered DNA methylation following ART (KCNQ1OT1, H19/IGF2 and GNAS) and found that female infant cord blood was associated with DNA hypomethylation. When compared to less invasive procedures such as intrauterine insemination, more invasive ARTs (in vitro fertilization, intracytoplasmic sperm injection, embryo culture) resulted in more marked and distinct effects on the cord blood DNA methylome. In the in vitro group, we found a close to fourfold higher proportion of significantly enriched Gene Ontology terms involved in development than in the in vivo group. CONCLUSIONS Our study highlights the ability of a sensitive, targeted, sequencing-based approach to uncover DNA methylation perturbations in cord blood associated with hypofertility and ART and influenced by offspring sex and ART technique invasiveness.
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Affiliation(s)
- Sophia Rahimi
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Xiaojian Shao
- Digital Technologies Research Centre, National Research Council Canada, Ottawa, ON, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON, Canada
| | - Donovan Chan
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Josée Martel
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Anick Bérard
- Research Unit On Medications and Pregnancy, Research Centre, CHU Sainte-Justine, Montreal, Canada
- Faculty of Pharmacy, Université de Montréal, Montreal, QC, Canada
- Faculty of Medicine, Université Claude Bernard Lyon 1, Lyon, France
| | - William D Fraser
- Department of Obstetrics and Gynecology, Université de Sherbrooke and Centre de Recherche du CHUS, Sherbrooke, QC, Canada
| | | | - Tony Kwan
- McGill University Genome Centre, Montreal, QC, Canada
- Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - Guillaume Bourque
- McGill University Genome Centre, Montreal, QC, Canada
- Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - Jacquetta Trasler
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada.
- Department of Human Genetics, McGill University, Montreal, QC, Canada.
- Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, Canada.
- Department of Pediatrics, McGill University, Montreal, QC, Canada.
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Steane SE, Cuffe JSM, Moritz KM. The role of maternal choline, folate and one-carbon metabolism in mediating the impact of prenatal alcohol exposure on placental and fetal development. J Physiol 2023; 601:1061-1075. [PMID: 36755527 PMCID: PMC10952912 DOI: 10.1113/jp283556] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 01/30/2023] [Indexed: 02/10/2023] Open
Abstract
Prenatal alcohol consumption (PAE) may be associated with a broad spectrum of impacts, ranging from no overt effects, to miscarriage, fetal growth restriction and fetal alcohol spectrum disorder. A major mechanism underlying the effects of PAE is considered to be altered DNA methylation and gene expression. Maternal nutritional status may be an important factor in determining the extent to which PAE impacts pregnancy outcomes, particularly the dietary micronutrients folate and choline because they provide methyl groups for DNA methylation via one carbon metabolism. This review summarises the roles of folate and choline in development of the blastocyst, the placenta and the fetal brain, and examines the evidence that maternal intake of these micronutrients can modify the effects of PAE on development. Studies of folate or choline deficiency have found reduced blastocyst development and implantation, reduced placental invasion, vascularisation and nutrient transport capability, impaired fetal brain development, and abnormal neurodevelopmental outcomes. PAE has been shown to reduce absorption and/or metabolism of folate and choline and to produce similar outcomes to maternal choline/folate deficiency. A few studies have demonstrated that the effects of PAE on brain development can be ameliorated by folate or choline supplementation; however, there is very limited evidence on the effects of supplementation in early pregnancy on the blastocyst and placenta. Further studies are required to support these findings and to determine optimal supplementation parameters.
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Affiliation(s)
- Sarah E. Steane
- School of Biomedical SciencesThe University of QueenslandSt LuciaQLDAustralia
| | - James S. M. Cuffe
- School of Biomedical SciencesThe University of QueenslandSt LuciaQLDAustralia
| | - Karen M. Moritz
- School of Biomedical SciencesThe University of QueenslandSt LuciaQLDAustralia
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Ihirwe RG, Martel J, Rahimi S, Trasler J. Protective and sex-specific effects of moderate dose folic acid supplementation on the placenta following assisted reproduction in mice. FASEB J 2023; 37:e22677. [PMID: 36515682 PMCID: PMC10108070 DOI: 10.1096/fj.202201428r] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 11/02/2022] [Accepted: 11/21/2022] [Indexed: 12/15/2022]
Abstract
Epigenetic defects induced by assisted reproductive technologies (ART) have been suggested as a potential mechanism contributing to suboptimal placentation. Here, we hypothesize that ART perturbs DNA methylation (DNAme) and gene expression during early placenta development, leading to abnormal placental phenotypes observed at term. Since folic acid (FA) plays a crucial role in epigenetic regulation, we propose that FA supplementation can rescue ART-induced placental defects. Female mice were placed on a control diet (CD), a moderate 4-fold (FAS4) or high dose 10-fold (FAS10) FA-supplemented diet prior to ART and compared to a natural mating group. ART resulted in 41 and 28 differentially expressed genes (DEGs) in E10.5 female and male placentas, respectively. Many DEGs were implicated in early placenta development and associated with DNAme changes; a number clustered at known imprinting control regions (ICR). In females, FAS4 partially corrected alterations in gene expression while FAS10 showed evidence of male-biased adverse effects. DNAme and gene expression for five genes involved in early placentation (Phlda2, EphB2, Igf2, Peg3, L3mbtl1) were followed up in placentas from normal as well as delayed and abnormal embryos. Phlda2 and Igf2 expression levels were lowest after ART in placentas of female delayed embryos. Moreover, ART concomitantly reduced DNAme at the Kcnq1ot1 ICR which regulates Phlda2 expression; FAS4 partially improved DNAme in a sex-specific manner. In conclusion, ART-associated placental DNAme and transcriptome alterations observed at mid-gestation are sex-specific; they may help explain adverse placental phenotypes detected at term and are partially corrected by maternal moderate dose FA supplementation.
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Affiliation(s)
- Rita Gloria Ihirwe
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada.,Department of Pharmacology & Therapeutics, McGill University, Montreal, Quebec, Canada
| | - Josée Martel
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Sophia Rahimi
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Jacquetta Trasler
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada.,Department of Pharmacology & Therapeutics, McGill University, Montreal, Quebec, Canada.,Department of Pediatrics, McGill University, Montreal, Quebec, Canada.,Department of Human Genetics, McGill University, Montreal, Quebec, Canada
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Lloyd DT, Skinner HG, Maguire R, Murphy SK, Motsinger-Reif AA, Hoyo C, House JS. Clomifene and Assisted Reproductive Technology in Humans Are Associated with Sex-Specific Offspring Epigenetic Alterations in Imprinted Control Regions. Int J Mol Sci 2022; 23:10450. [PMID: 36142363 PMCID: PMC9499479 DOI: 10.3390/ijms231810450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 09/02/2022] [Accepted: 09/07/2022] [Indexed: 12/04/2022] Open
Abstract
Children conceived with assisted reproductive technology (ART) have an increased risk of adverse outcomes, including congenital malformations and imprinted gene disorders. In a retrospective North Carolina-based-birth-cohort, we examined the effect of ovulation drugs and ART on CpG methylation in differentially methylated CpGs in known imprint control regions (ICRs). Nine ICRs containing 48 CpGs were assessed for methylation status by pyrosequencing in mixed leukocytes from cord blood. After restricting to non-smoking, college-educated participants who agreed to follow-up, ART-exposed (n = 27), clomifene-only-exposed (n = 22), and non-exposed (n = 516) groups were defined. Associations of clomifene and ART with ICR CpG methylation were assessed with linear regression and stratifying by offspring sex. In males, ART was associated with hypomethylation of the PEG3 ICR [β(95% CI) = -1.46 (-2.81, -0.12)] and hypermethylation of the MEG3 ICR [3.71 (0.01, 7.40)]; clomifene-only was associated with hypomethylation of the NNAT ICR [-5.25 (-10.12, -0.38)]. In female offspring, ART was associated with hypomethylation of the IGF2 ICR [-3.67 (-6.79, -0.55)]. Aberrant methylation of these ICRs has been associated with cardiovascular disease and metabolic and behavioral outcomes in children. The results suggest that the increased risk of adverse outcomes in offspring conceived through ART may be due in part to altered methylation of ICRs. Larger studies utilizing epigenome-wide interrogation are warranted.
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Affiliation(s)
- Dillon T. Lloyd
- Center for Human Health and the Environment, North Carolina State University, Raleigh, NC 27606, USA
- Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC 27709, USA
- Bioinformatics Research Center, North Carolina State University, Raleigh, NC 27607, USA
| | - Harlyn G. Skinner
- Center for Human Health and the Environment, North Carolina State University, Raleigh, NC 27606, USA
- Department of Biological Sciences, North Carolina State University, Raleigh, NC 27607, USA
| | - Rachel Maguire
- Center for Human Health and the Environment, North Carolina State University, Raleigh, NC 27606, USA
- Department of Biological Sciences, North Carolina State University, Raleigh, NC 27607, USA
| | - Susan K. Murphy
- Department of Obstetrics and Gynecology, Duke University Medical Center, Duke University, Durham, NC 27701, USA
| | - Alison A. Motsinger-Reif
- Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC 27709, USA
| | - Cathrine Hoyo
- Center for Human Health and the Environment, North Carolina State University, Raleigh, NC 27606, USA
- Department of Biological Sciences, North Carolina State University, Raleigh, NC 27607, USA
| | - John S. House
- Center for Human Health and the Environment, North Carolina State University, Raleigh, NC 27606, USA
- Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC 27709, USA
- Bioinformatics Research Center, North Carolina State University, Raleigh, NC 27607, USA
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11
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Kohil A, Chouliaras S, Alabduljabbar S, Lakshmanan AP, Ahmed SH, Awwad J, Terranegra A. Female infertility and diet, is there a role for a personalized nutritional approach in assisted reproductive technologies? A Narrative Review. Front Nutr 2022; 9:927972. [PMID: 35938101 PMCID: PMC9353397 DOI: 10.3389/fnut.2022.927972] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 06/27/2022] [Indexed: 11/23/2022] Open
Abstract
Female infertility is a major public health concern and a global challenge. It is a disorder of the reproductive system, defined as the inability to achieve a clinical pregnancy. Nutrition and other environmental factors are found to impact reproductive health in women as well as the outcome of assisted reproductive technologies (ART). Dietary factors, such as polyunsaturated fatty acids (PUFA), fiber as well as the intake of Mediterranean diet appear to exert beneficial effects on female reproductive outcomes. The exact mechanisms associating diet to female fertility are yet to be identified, although genomic, epigenomic, and microbial pathways may be implicated. This review aims to summarize the current knowledge on the impact of dietary components on female reproduction and ART outcomes, and to discuss the relevant interplay of diet with genome, epigenome and microbial composition.
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Affiliation(s)
- Amira Kohil
- Research Department, Sidra Medicine, Doha, Qatar
| | | | | | | | | | - Johnny Awwad
- Reproductive Medicine Unit, Sidra Medicine, Doha, Qatar
| | - Annalisa Terranegra
- Research Department, Sidra Medicine, Doha, Qatar
- *Correspondence: Annalisa Terranegra
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12
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Shekhawat DS, Singh P, Sharma P, Singh K. Comment: Do Maternal Micronutrient Deficiencies Program the Body Composition and Behavior of the Offspring? Probable Underlying Mechanisms. Ann Natl Acad Med Sci 2022. [DOI: 10.1055/s-0042-1743135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
Affiliation(s)
- Dolat Singh Shekhawat
- Department of Pediatrics, All India Institute of Medical Sciences Jodhpur, Jodhpur, Rajasthan, India
| | - Pratibha Singh
- Department of Obstetrics and Gynaecology, All India Institute of Medical Sciences Jodhpur, Jodhpur, Rajasthan, India
| | - Praveen Sharma
- Department of Biochemistry, All India Institute of Medical Sciences Jodhpur, Jodhpur, Rajasthan, India
| | - Kuldeep Singh
- Department of Pediatrics, All India Institute of Medical Sciences Jodhpur, Jodhpur, Rajasthan, India
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Wilson RD, O'Connor DL. Guideline No. 427: Folic Acid and Multivitamin Supplementation for Prevention of Folic Acid-Sensitive Congenital Anomalies. J Obstet Gynaecol Can 2022; 44:707-719.e1. [PMID: 35691683 DOI: 10.1016/j.jogc.2022.04.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
OBJECTIVE To provide updated guidance on pre-conception folic acid and multivitamin supplementation for primary and secondary (recurrence) prevention of neural tube defects and other folate-sensitive congenital anomalies. TARGET POPULATION Women aged 12-45 years who could become pregnant should be aware of the risk of serious birth defects without adequate pre-conception and first-trimester folic acid supplementation. OPTIONS Optimizing folic acid supplementation is complex and depends on factors including dosage; type of supplement; bioavailability of folate from food, timing of initiating supplementation; and metabolic and genetic factors. For all women who could become pregnant, a low daily dosage of folic acid is recommended before conception and throughout pregnancy and breastfeeding. High-dosage folic acid supplementation is recommended only for women who can become pregnant and have had a previous pregnancy affected by a neural tube defect or other folate-sensitive congenital anomaly. Directed personalized approaches could be considered and adopted for women who can become pregnant and have complex risks (genetic, medical, or surgical risk factors), using new knowledge of co-factor metabolism and synergy, as well as red blood cell or serum folate testing. Such approaches would require changes to current provincial health care maternal serum folate screening/testing. OUTCOMES New approaches to oral folic acid supplementation, including triage tools, need to be considered to optimize the benefits of decreasing risk of neural tube defects and folate-sensitive congenital anomalies. BENEFITS, HARMS, AND COSTS Oral folic acid supplementation, or dietary folate intake combined with a multivitamin/micronutrient supplement, is associated with lower rates of neural tube defects, other folate-sensitive birth defects, and obstetrical complications. The costs are those attributable to daily vitamin supplementation and a healthy, folate-rich diet. EVIDENCE A literature search was designed and carried in PubMed and the Cochrane Library databases from 1990 to 2021 using following MeSH terms and keywords (and variants): folic acid supplementation; folate food fortification; primary neural tube defect prevention; prevention of recurrence of neural tube defects; folate-sensitive birth defects; folate supplementation benefit; folate supplementation risk; folate pregnant woman physiology; pregnant woman RBC folate level; pregnant woman serum folate levels; folate and epilepsy; folate and obesity. This guideline was based upon expert guidelines or opinions, systematic reviews, randomized controlled clinical trials, and observational case-control studies and case series retrieved, published in English from 1990 to 2021. VALIDATION METHODS The authors rated the quality of evidence and strength of recommendations using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach. See online Appendix A (Tables A1 for definitions and A2 for interpretations of strong and weak recommendations). INTENDED AUDIENCE Maternity health care providers (physicians, midwives, nurses) and other providers of pregnancy-related wellness and health counselling. SUMMARY STATEMENTS RECOMMENDATIONS.
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Wilson RD, O'Connor DL. Directive clinique n o427 : Suppléments d'acide folique et multivitamines en prévention des anomalies congénitales sensibles à l'acide folique. J Obstet Gynaecol Can 2022; 44:720-732.e1. [PMID: 35691684 DOI: 10.1016/j.jogc.2022.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIF Offrir des recommandations à jour sur l'utilisation de multivitamines et de suppléments d'acide folique avant la conception pour la prévention primaire et secondaire (récidive) des anomalies du tube neural et des autres anomalies congénitales sensibles à l'acide folique. POPULATION CIBLE Les femmes de 12 à 45 ans qui pourraient devenir enceintes doivent être informées des risques importants d'anomalies congénitales en l'absence d'une supplémentation adéquate en acide folique avant la conception et pendant le premier trimestre. OPTIONS La supplémentation optimale en acide folique est complexe et repose sur divers facteurs tels que la dose, le type de suppléments, la biodisponibilité du folate dans l'alimentation, le moment du début de la supplémentation ainsi que sur les facteurs métaboliques et génétiques. Pour toutes les femmes qui peuvent devenir enceintes, une faible dose quotidienne d'acide folique est recommandée avant la conception et pendant la grossesse et l'allaitement. La supplémentation à forte dose d'acide folique est recommandée uniquement chez les femmes qui peuvent devenir enceintes et qui ont un antécédent de grossesse avec anomalie du tube neural ou toute autre anomalie congénitale sensible à l'acide folique. Il est possible d'envisager et d'adopter une approche personnalisée chez les femmes qui peuvent devenir enceintes et qui présentent des risques complexes (facteurs de risque génétiques, médicaux ou chirurgicaux) en se fondant sur les nouvelles connaissances en matière de métabolisme et synergie des cofacteurs et sur l'analyse du taux sérique et érythrocytaire d'acide folique. Ce genre d'approche exige une modification des protocoles provinciaux actuels de santé publique concernant le dépistage et l'analyse du taux sérique maternel d'acide folique. RéSULTATS: Les nouvelles stratégies de supplémentation en acide folique par voie orale, y compris dans les outils de triage, doivent être prises en compte pour diminuer de façon optimale le risque d'anomalies du tube neural et d'anomalies congénitales sensibles à l'acide folique. BéNéFICES, RISQUES ET COûTS: On observe une diminution du taux d'anomalies du tube neural, des autres anomalies congénitales sensibles à l'acide folique et des complications obstétricales chez les femmes qui prennent des suppléments oraux d'acide folique ou qui complémentent leur apport alimentaire en folate au moyen de multivitamines ou de suppléments de micronutriments. Les coûts relatifs sont liés à la prise quotidienne de suppléments vitaminiques et à l'adoption d'un régime alimentaire sain et riche en folate. DONNéES PROBANTES: Une recherche a été effectuée dans les bases de données PubMed et Cochrane Library pour trouver des articles publiés entre 1990 et 2021, en utilisant les termes MeSH et mots-clés (et leurs variantes) suivants : folate food fortification; primary neural tube defect prevention; prevention of recurrence of neural tube defects; folate-sensitive birth defects; folate supplementation benefit; folate supplementation risk; folate pregnant woman physiology; pregnant woman RBC folate level; pregnant woman serum folate levels; folate and epilepsy; folate and obesity. Cette directive clinique repose sur des lignes directrices et opinions de spécialistes, des revues systématiques, des essais cliniques randomisés et des études observationnelles de cas-témoin et de séries de cas qui ont été publiés en anglais entre 1990 et 2021. MéTHODES DE VALIDATION: Les auteurs ont évalué la qualité des données probantes et la force des recommandations en utilisant le cadre méthodologique GRADE (Grading of Recommendations, Assessment, Development, and Evaluation). Voir l'annexe A en ligne (tableau A1 pour les définitions et tableau A2 pour l'interprétation des recommandations fortes et faibles). PROFESSIONNELS CONCERNéS: Fournisseurs de soins de maternité (médecins, sages-femmes et infirmières) et autres fournisseurs d'accompagnement en santé et bien-être lié à la grossesse. DÉCLARATIONS SOMMAIRES: RECOMMANDATIONS.
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dos Santos Mendonça-soares A, Guimarães ALS, Fidelis AAG, Franco MM, Dode MAN. The use of insulin-transferrin-selenium (ITS), and folic acid on individual in vitro embryo culture systems in cattle. Theriogenology 2022; 184:153-61. [DOI: 10.1016/j.theriogenology.2022.03.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 03/09/2022] [Accepted: 03/09/2022] [Indexed: 11/21/2022]
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Sandovici I, Fernandez-Twinn DS, Hufnagel A, Constância M, Ozanne SE. Sex differences in the intergenerational inheritance of metabolic traits. Nat Metab 2022; 4:507-523. [PMID: 35637347 DOI: 10.1038/s42255-022-00570-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 04/05/2022] [Indexed: 02/02/2023]
Abstract
Strong evidence suggests that early-life exposures to suboptimal environmental factors, including those in utero, influence our long-term metabolic health. This has been termed developmental programming. Mounting evidence suggests that the growth and metabolism of male and female fetuses differ. Therefore, sexual dimorphism in response to pre-conception or early-life exposures could contribute to known sex differences in susceptibility to poor metabolic health in adulthood. However, until recently, many studies, especially those in animal models, focused on a single sex, or, often in the case of studies performed during intrauterine development, did not report the sex of the animal at all. In this review, we (a) summarize the evidence that male and females respond differently to a suboptimal pre-conceptional or in utero environment, (b) explore the potential biological mechanisms that underlie these differences and (c) review the consequences of these differences for long-term metabolic health, including that of subsequent generations.
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Affiliation(s)
- Ionel Sandovici
- Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Cambridge, UK
- Department of Obstetrics and Gynaecology and National Institute for Health Research Cambridge Biomedical Research Centre, Cambridge, UK
- Centre for Trophoblast Research, Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK
| | - Denise S Fernandez-Twinn
- Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Cambridge, UK
| | - Antonia Hufnagel
- Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Cambridge, UK
| | - Miguel Constância
- Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Cambridge, UK.
- Department of Obstetrics and Gynaecology and National Institute for Health Research Cambridge Biomedical Research Centre, Cambridge, UK.
- Centre for Trophoblast Research, Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK.
| | - Susan E Ozanne
- Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Cambridge, UK.
- Centre for Trophoblast Research, Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK.
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Bokor S, Vass RA, Funke S, Ertl T, Molnár D. Epigenetic Effect of Maternal Methyl-Group Donor Intake on Offspring’s Health and Disease. Life (Basel) 2022; 12:609. [PMID: 35629277 PMCID: PMC9145757 DOI: 10.3390/life12050609] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 04/02/2022] [Accepted: 04/15/2022] [Indexed: 01/16/2023] Open
Abstract
Maternal exposure to some dietary and environmental factors during embryonic development can affect offspring’s phenotype and, furthermore, the risk of developing diseases later in life. One potential mechanism responsible for this early programming may be the modification of the epigenome, such as DNA methylation. Methyl-group donors are essential for DNA methylation and are shown to have an important role in fetal development and later health. The main goal of the present review is to summarize the available literature data on the epigenetic effect (DNA methylation) of maternal methyl-group donor availability on reproductivity, perinatal outcome, and later health of the offspring. In our literature search, we found evidence for the association between alterations in DNA methylation patterns caused by different maternal methyl-group donor (folate, choline, methionine, betaine) intake and reproductivity, birth weight, neural tube defect, congenital heart defect, cleft lip and palate, brain development, and the development of obesity and associated non-communicable diseases in later life. We can conclude that maternal methyl-group donor availability could affect offspring’s health via alterations in DNA methylation and may be a major link between early environmental exposure and the development of diseases in the offspring. However, still, further studies are necessary to confirm the associations and causal relationships.
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18
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Bari MW, Ishiyama S, Matsumoto S, Mochizuki K, Kishigami S. From lessons on the long-term effects of the preimplantation environment on later health to a "modified ART-DOHaD" animal model. Reprod Med Biol 2022; 21:e12469. [PMID: 35781921 PMCID: PMC9243299 DOI: 10.1002/rmb2.12469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 05/08/2022] [Accepted: 05/14/2022] [Indexed: 11/10/2022] Open
Abstract
Background At its earliest stages, mammalian embryonic development is apparently simple but vulnerable. The environment during the preimplantation period, which only lasts a couple of days, has been implicated in adult health, extending to such early stages the concept of the developmental origin of health and disease (DOHaD). Methods In this review, we first provide a brief history of assisted reproductive technology (ART) focusing on in vitro culture and its outcomes during subsequent development mainly in mice and humans. Further, we introduce the "MEM mouse," a novel type 2 diabetes mouse model generated by in vitro culture of preimplantation embryos in alpha minimum essential medium (αMEM). Main findings The association between ART and its long-term effects has been carefully examined for its application in human infertility treatment. The "MEM mouse" develops steatohepatitis and kidney disease with diabetes into adulthood. Conclusion The close association between the environment of preimplantation and health in postnatal life is being clarified. The approach by which severe mouse phenotypes are successfully induced by manipulating the environment of preimplantation embryos could provide new chronic disease animal models, which we call "modified ART-DOHaD" animal models. This will also offer insights into the mechanisms underlying their long-term effects.
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Affiliation(s)
- Md Wasim Bari
- Department of Integrated Applied Life ScienceUniversity of YamanashiYamanashiJapan
| | - Shiori Ishiyama
- Department of Integrated Applied Life ScienceUniversity of YamanashiYamanashiJapan
- Faculty of Life and Environmental SciencesUniversity of YamanashiYamanashiJapan
| | - Sachi Matsumoto
- Faculty of Life and Environmental SciencesUniversity of YamanashiYamanashiJapan
| | - Kazuki Mochizuki
- Department of Integrated Applied Life ScienceUniversity of YamanashiYamanashiJapan
- Faculty of Life and Environmental SciencesUniversity of YamanashiYamanashiJapan
| | - Satoshi Kishigami
- Department of Integrated Applied Life ScienceUniversity of YamanashiYamanashiJapan
- Faculty of Life and Environmental SciencesUniversity of YamanashiYamanashiJapan
- Center for advanced Assisted Reproductive TechnologiesUniversity of YamanashiYamanashiJapan
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Peral-Sanchez I, Hojeij B, Ojeda DA, Steegers-Theunissen RPM, Willaime-Morawek S. Epigenetics in the Uterine Environment: How Maternal Diet and ART May Influence the Epigenome in the Offspring with Long-Term Health Consequences. Genes (Basel) 2021; 13:31. [PMID: 35052371 PMCID: PMC8774448 DOI: 10.3390/genes13010031] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 12/15/2021] [Accepted: 12/20/2021] [Indexed: 12/12/2022] Open
Abstract
The societal burden of non-communicable disease is closely linked with environmental exposures and lifestyle behaviours, including the adherence to a poor maternal diet from the earliest preimplantation period of the life course onwards. Epigenetic variations caused by a compromised maternal nutritional status can affect embryonic development. This review summarises the main epigenetic modifications in mammals, especially DNA methylation, histone modifications, and ncRNA. These epigenetic changes can compromise the health of the offspring later in life. We discuss different types of nutritional stressors in human and animal models, such as maternal undernutrition, seasonal diets, low-protein diet, high-fat diet, and synthetic folic acid supplement use, and how these nutritional exposures epigenetically affect target genes and their outcomes. In addition, we review the concept of thrifty genes during the preimplantation period, and some examples that relate to epigenetic change and diet. Finally, we discuss different examples of maternal diets, their effect on outcomes, and their relationship with assisted reproductive technology (ART), including their implications on epigenetic modifications.
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Affiliation(s)
- Irene Peral-Sanchez
- Faculty of Medicine, University of Southampton, Southampton SO16 6YD, UK; (D.A.O.); (S.W.-M.)
| | - Batoul Hojeij
- Department Obstetrics and Gynecology, Erasmus MC, University Medical Center, 3000 CA Rotterdam, The Netherlands; (B.H.); (R.P.M.S.-T.)
| | - Diego A. Ojeda
- Faculty of Medicine, University of Southampton, Southampton SO16 6YD, UK; (D.A.O.); (S.W.-M.)
| | - Régine P. M. Steegers-Theunissen
- Department Obstetrics and Gynecology, Erasmus MC, University Medical Center, 3000 CA Rotterdam, The Netherlands; (B.H.); (R.P.M.S.-T.)
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Ryznar RJ, Phibbs L, Van Winkle LJ. Epigenetic Modifications at the Center of the Barker Hypothesis and Their Transgenerational Implications. Int J Environ Res Public Health 2021; 18:12728. [PMID: 34886453 DOI: 10.3390/ijerph182312728] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 11/15/2021] [Accepted: 11/29/2021] [Indexed: 02/08/2023]
Abstract
Embryo/fetal nutrition and the environment in the reproductive tract influence the subsequent risk of developing adult diseases and disorders, as formulated in the Barker hypothesis. Metabolic syndrome, obesity, heart disease, and hypertension in adulthood have all been linked to unwanted epigenetic programing in embryos and fetuses. Multiple studies support the conclusion that environmental challenges, such as a maternal low-protein diet, can change one-carbon amino acid metabolism and, thus, alter histone and DNA epigenetic modifications. Since histones influence gene expression and the program of embryo development, these epigenetic changes likely contribute to the risk of adult disease onset not just in the directly affected offspring, but for multiple generations to come. In this paper, we hypothesize that the effects of parental nutritional status on fetal epigenetic programming are transgenerational and warrant further investigation. Numerous studies supporting this hypothesis are reviewed, and potential research techniques to study these transgenerational epigenetic effects are offered.
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Takemori K, Matsuo T, Watanabe T, Ebara S, Chikugo T, Kometani T. Effects of Inadequate Folate Intake on the Onset and Progression of Hypertensive Vascular Injury. J Nutr Sci Vitaminol (Tokyo) 2021; 67:310-316. [PMID: 34719616 DOI: 10.3177/jnsv.67.310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
We investigated the effects of inadequate folate intake on the onset and progression of hypertensive organ injury. In the present study, 5-wk-old male stroke-prone spontaneously hypertensive rats (SHRSP) were fed with a normal-folate (control; 160-170 μg of folate/100 g diet) or low-folate (8-10 μg of folate/100 g diet) diet until they reached 25 wk of age. After the animals reached 10 wk of age, the bodyweight of the rats in the low-folate group was lower than that of the rats in the control group. Regarding blood pressure, both groups had severe hypertension of ≥230 mmHg at 12 wk of age that was not significantly different between the groups. At 16 wk of age, the low-folate group had a low number of blood cell types. The folate levels in the serum, liver, and kidneys of these rats were significantly lower (p<0.01) and the serum homocysteine level in the low-folate group was significantly higher than in the controls. The low-folate group had a significantly lower testicular weight than the control group (p<0.05) and arterial hypertrophy, spermatogenesis arrest, and interstitial connective tissue hyperplasia were observed. However, there was no clear difference in lesions in other organs. These results indicated that under low folate status, SHRSP causes hematopoietic disorders and exacerbates hypertensive vascular injury at various degrees by organ type.
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Affiliation(s)
- Kumiko Takemori
- Department of Food Science and Nutrition, Faculty of Agriculture, Kindai University
| | - Takuya Matsuo
- Department of Arts and Sciences, Faculty of Medicine, Kindai University
| | - Toshiaki Watanabe
- Department of Health and Nutrition, Faculty of Health Science, Osaka Aoyama University
| | - Shuhei Ebara
- Department of Health and Nutrition, Faculty of Health Science, Osaka Aoyama University
| | - Takaaki Chikugo
- Department of Pathology, Faculty of Medicine, Kindai University
| | - Takashi Kometani
- Department of Food Science and Nutrition, Faculty of Agriculture, Kindai University
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Karahan G, Chan D, Shirane K, McClatchie T, Janssen S, Baltz JM, Lorincz M, Trasler J. Paternal MTHFR deficiency leads to hypomethylation of young retrotransposons and reproductive decline across two successive generations. Development 2021; 148:dev199492. [PMID: 34128976 PMCID: PMC8276981 DOI: 10.1242/dev.199492] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 06/01/2021] [Indexed: 12/17/2022]
Abstract
5,10-Methylenetetrahydrofolate reductase (MTHFR) is a crucial enzyme in the folate metabolic pathway with a key role in generating methyl groups. As MTHFR deficiency impacts male fertility and sperm DNA methylation, there is the potential for epimutations to be passed to the next generation. Here, we assessed whether the impact of MTHFR deficiency on testis morphology and sperm DNA methylation is exacerbated across generations in mouse. Although MTHFR deficiency in F1 fathers has only minor effects on sperm counts and testis weights and histology, F2 generation sons show further deterioration in reproductive parameters. Extensive loss of DNA methylation is observed in both F1 and F2 sperm, with >80% of sites shared between generations, suggestive of regions consistently susceptible to MTHFR deficiency. These regions are generally methylated during late embryonic germ cell development and are enriched in young retrotransposons. As retrotransposons are resistant to reprogramming of DNA methylation in embryonic germ cells, their hypomethylated state in the sperm of F1 males could contribute to the worsening reproductive phenotype observed in F2 MTHFR-deficient males, compatible with the intergenerational passage of epimutations.
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Affiliation(s)
- Gurbet Karahan
- Department of Human Genetics, McGill University, Montreal, QC H3A 0C7, Canada
- Child Health and Human Development Program, Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada
| | - Donovan Chan
- Child Health and Human Development Program, Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada
| | - Kenjiro Shirane
- Department of Medical Genetics, Molecular Epigenetics Group, Life Sciences Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Taylor McClatchie
- Chronic Disease Program, Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
- Departments of Obstetrics and Gynecology and Cellular and Molecular Medicine, University of Ottawa Faculty of Medicine, Ottawa, ON K1H 8M5, Canada
| | - Sanne Janssen
- Department of Medical Genetics, Molecular Epigenetics Group, Life Sciences Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Jay M. Baltz
- Chronic Disease Program, Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
- Departments of Obstetrics and Gynecology and Cellular and Molecular Medicine, University of Ottawa Faculty of Medicine, Ottawa, ON K1H 8M5, Canada
| | - Matthew Lorincz
- Department of Medical Genetics, Molecular Epigenetics Group, Life Sciences Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Jacquetta Trasler
- Department of Human Genetics, McGill University, Montreal, QC H3A 0C7, Canada
- Child Health and Human Development Program, Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada
- Department of Pharmacology and Therapeutics, McGill University, Montreal, QC H3A 1A3, Canada
- Department of Pediatrics, McGill University, Montreal, QC H4A 3J1, Canada
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23
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Penailillo RS, Eckert JJ, Burton MA, Burdge GC, Fleming TP, Lillycrop KA. High maternal folic acid intake around conception alters mouse blastocyst lineage allocation and expression of key developmental regulatory genes. Mol Reprod Dev 2021; 88:261-273. [PMID: 33719134 DOI: 10.1002/mrd.23462] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 02/05/2021] [Accepted: 02/20/2021] [Indexed: 12/16/2022]
Abstract
Folate, a cofactor for the supply of one-carbon groups, is required by epigenetic processes to regulate cell lineage determination during development. The intake of folic acid (FA), the synthetic form of folate, has increased significantly over the past decade, but the effects of high periconceptional FA intake on cell lineage determination in the early embryo remains unknown. Here, we investigated the effect of maternal high FA (HFA) intake on blastocyst development and expression of key regulatory genes. C57BL/6 adult female mice were fed either Control diet (1 mg FA) for 4 weeks before conception and during the preimplantation period (Con-Con); Control diet for 4 weeks preconception, followed by HFA (5 mg FA) diet during preimplantation (Con-HFA); or HFA diet for 4 weeks preconception and during preimplantation (HFA-HFA). At E3.5, blastocyst cell number, protein, and mRNA expression were measured. In HFA-HFA blastocysts, trophectoderm cell numbers and expression of CDX2, Oct-4, and Nanog were reduced compared with Con-Con blastocysts; Con-HFA blastocysts showed lower CDX2 and Oct-4 expression than Con-Con blastocysts. These findings suggest periconceptional HFA intake induces changes in key regulators of embryo morphogenesis with potential implications for subsequent development.
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Affiliation(s)
- R S Penailillo
- Centre for Biological Sciences, University of Southampton, Southampton, UK
| | - J J Eckert
- School of Human Health and Development, University of Southampton, Southampton, UK
| | - M A Burton
- Centre for Biological Sciences, University of Southampton, Southampton, UK
| | - G C Burdge
- School of Human Health and Development, University of Southampton, Southampton, UK
| | - T P Fleming
- Centre for Biological Sciences, University of Southampton, Southampton, UK
| | - K A Lillycrop
- Centre for Biological Sciences, University of Southampton, Southampton, UK
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24
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Gennari Verruma C, Credendio Eiras M, Fernandes A, Vila RA, Libardi Miranda Furtado C, Silveira Ramos E, Barbosa Lôbo R. Folic acid supplementation during oocytes maturation influences in vitro production and gene expression of bovine embryos. ZYGOTE 2021;:1-8. [PMID: 33685547 DOI: 10.1017/S0967199421000022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Embryos that are produced in vitro frequently present epigenetic modifications. However, maternal supplementation with folic acid (FA) may improve oocyte maturation and embryo development, preventing epigenetic errors in the offspring. We sought to evaluate the influence of FA supplementation during in vitro maturation of grade I (GI) and grade III (GIII) bovine oocytes on embryo production rate and the expression of IGF2 and KCNQ1OT1 genes. The oocytes were matured in vitro with different concentrations of FA (0, 10, 30 and 100 μM), followed by in vitro fertilization and embryo culture. On the seventh day (D7) of culture, embryo production was evaluated and gene expression was measured using real-time qPCR. Supplementation with 10 μM of FA did not affect embryo production for GI and GIII oocytes. Moderate supplementation (30 μM) seemed to be a positive influence, increasing embryo production for GIII (P = 0.012), while the highest dose (100 μM) reduced embryo production (P = 0.010) for GI, and IGF2 expression was not detected. In GIII, only embryos whose oocyte maturation was not supplemented with FA demonstrated detected IGF2 expression. The lowest concentration of FA (10 μM) reduced KCNQ1OT1 expression (P = 0.05) on embryos from GIII oocytes. Different FA concentrations induced different effects on bovine embryo production and gene expression that was related to oocyte quality. Despite the epigenetic effects of FA, supplementation seems to be a promising factor to improve bovine embryo production if used carefully, as concentration is an important factor, especially in oocytes with impaired quality.
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25
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Clare CE, Pestinger V, Kwong WY, Tutt DAR, Xu J, Byrne HM, Barrett DA, Emes RD, Sinclair KD. Interspecific Variation in One-Carbon Metabolism within the Ovarian Follicle, Oocyte, and Preimplantation Embryo: Consequences for Epigenetic Programming of DNA Methylation. Int J Mol Sci 2021; 22:1838. [PMID: 33673278 DOI: 10.3390/ijms22041838] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Revised: 02/07/2021] [Accepted: 02/09/2021] [Indexed: 02/07/2023] Open
Abstract
One-carbon (1C) metabolism provides methyl groups for the synthesis and/or methylation of purines and pyrimidines, biogenic amines, proteins, and phospholipids. Our understanding of how 1C pathways operate, however, pertains mostly to the (rat) liver. Here we report that transcripts for all bar two genes (i.e., BHMT, MAT1A) encoding enzymes in the linked methionine-folate cycles are expressed in all cell types within the ovarian follicle, oocyte, and blastocyst in the cow, sheep, and pig; as well as in rat granulosa cells (GCs) and human KGN cells (a granulosa-like tumor cell line). Betaine-homocysteine methyltransferase (BHMT) protein was absent in bovine theca and GCs, as was activity of this enzyme in GCs. Mathematical modeling predicted that absence of this enzyme would lead to more volatile S-adenosylmethionine-mediated transmethylation in response to 1C substrate (e.g., methionine) or cofactor provision. We tested the sensitivity of bovine GCs to reduced methionine (from 50 to 10 µM) and observed a diminished flux of 1C units through the methionine cycle. We then used reduced-representation bisulfite sequencing to demonstrate that this reduction in methionine during bovine embryo culture leads to genome-wide alterations to DNA methylation in >1600 genes, including a cohort of imprinted genes linked to an abnormal fetal-overgrowth phenotype. Bovine ovarian and embryonic cells are acutely sensitive to methionine, but further experimentation is required to determine the significance of interspecific variation in BHMT expression.
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26
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Rodríguez-Varela C, Labarta E. Clinical Application of Antioxidants to Improve Human Oocyte Mitochondrial Function: A Review. Antioxidants (Basel) 2020; 9:antiox9121197. [PMID: 33260761 PMCID: PMC7761442 DOI: 10.3390/antiox9121197] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/24/2020] [Accepted: 11/25/2020] [Indexed: 12/11/2022] Open
Abstract
Mitochondria produce adenosine triphosphate (ATP) while also generating high amounts of reactive oxygen species (ROS) derived from oxygen metabolism. ROS are small but highly reactive molecules that can be detrimental if unregulated. While normally functioning mitochondria produce molecules that counteract ROS production, an imbalance between the amount of ROS produced in the mitochondria and the capacity of the cell to counteract them leads to oxidative stress and ultimately to mitochondrial dysfunction. This dysfunction impairs cellular functions through reduced ATP output and/or increased oxidative stress. Mitochondrial dysfunction may also lead to poor oocyte quality and embryo development, ultimately affecting pregnancy outcomes. Improving mitochondrial function through antioxidant supplementation may enhance reproductive performance. Recent studies suggest that antioxidants may treat infertility by restoring mitochondrial function and promoting mitochondrial biogenesis. However, further randomized, controlled trials are needed to determine their clinical efficacy. In this review, we discuss the use of resveratrol, coenzyme-Q10, melatonin, folic acid, and several vitamins as antioxidant treatments to improve human oocyte and embryo quality, focusing on the mitochondria as their main hypothetical target. However, this mechanism of action has not yet been demonstrated in the human oocyte, which highlights the need for further studies in this field.
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Affiliation(s)
- Cristina Rodríguez-Varela
- IVI Foundation—IIS La Fe, Fernando Abril Martorell 106, Torre A, Planta 1ª, 46026 Valencia, Spain;
- Correspondence:
| | - Elena Labarta
- IVI Foundation—IIS La Fe, Fernando Abril Martorell 106, Torre A, Planta 1ª, 46026 Valencia, Spain;
- IVIRMA Valencia, Plaza de la Policía Local 3, 46015 Valencia, Spain
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27
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Geng X, Zhao J, Huang J, Li S, Chu W, Wang WS, Chen ZJ, Du Y. lnc-MAP3K13-7:1 Inhibits Ovarian GC Proliferation in PCOS via DNMT1 Downregulation-Mediated CDKN1A Promoter Hypomethylation. Mol Ther 2020; 29:1279-1293. [PMID: 33212300 PMCID: PMC7934583 DOI: 10.1016/j.ymthe.2020.11.018] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 10/19/2020] [Accepted: 11/11/2020] [Indexed: 12/12/2022] Open
Abstract
Polycystic ovary syndrome (PCOS) is an endocrine-related disease and global cause of infertility that is associated with abnormal folliculogenesis. Inhibited granulosa cell (GC) proliferation is recognized as a key factor that underlies aberrant follicle maturation. Many epigenetic landscape modifications have been characterized in PCOS patients. However, the epigenetic regulation pathways in follicular dysplasia are not completely understood. In this study, we reported a novel mechanism of DNA hypomethylation induced by long non-coding RNAs (lncRNAs) and its function in cell cycle progression. We observed that lnc-MAP3K13-7:1 was highly expressed in GCs from patients with PCOS, with concomitant global DNA hypomethylation, decreased DNA methyltransferase 1 (DNMT1) expression, and increased cyclin-dependent kinase inhibitor 1A (CDKN1A, p21) expression. In KGN cells, lnc-MAP3K13-7:1 overexpression resulted in cell cycle arrest in the G0/G1 phase, as well as the molecular inhibition and genetic silencing of DNMT1. Mechanistically, lnc-MAP3K13-7:1 inhibited DNMT1 expression by acting as a protein-binding scaffold and inducing ubiquitin-mediated DNMT1 protein degradation. Moreover, DNMT1-dependent CDKN1A promoter hypomethylation increased CDKN1A transcription, resulting in attenuated GC growth. Our work uncovered a novel and essential mechanism through which lnc-MAP3K13-7:1-dependent DNMT1 inhibition regulates CDKN1A/p21 expression and inhibits GC proliferation.
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Affiliation(s)
- Xueying Geng
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200135, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai 200135, China
| | - Jun Zhao
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200135, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai 200135, China
| | - Jiayu Huang
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200135, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai 200135, China
| | - Shang Li
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200135, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai 200135, China
| | - Weiwei Chu
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200135, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai 200135, China
| | - Wang-Sheng Wang
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200135, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai 200135, China
| | - Zi-Jiang Chen
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200135, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai 200135, China; Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China; National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, Shandong 250012, China; Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, Shandong 250012, China
| | - Yanzhi Du
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200135, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai 200135, China.
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28
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Vrooman LA, Rhon-Calderon EA, Chao OY, Nguyen DK, Narapareddy L, Dahiya AK, Putt ME, Schultz RM, Bartolomei MS. Assisted reproductive technologies induce temporally specific placental defects and the preeclampsia risk marker sFLT1 in mouse. Development 2020; 147:147/11/dev186551. [PMID: 32471820 DOI: 10.1242/dev.186551] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Accepted: 04/18/2020] [Indexed: 12/11/2022]
Abstract
Although widely used, assisted reproductive technologies (ARTs) are associated with adverse perinatal outcomes. To elucidate their underlying causes, we have conducted a longitudinal analysis of placental development and fetal growth using a mouse model to investigate the effects of individual ART procedures: hormone stimulation, in vitro fertilization (IVF), embryo culture and embryo transfer. We demonstrate that transfer of blastocysts naturally conceived without hormone stimulation and developed in vivo prior to transfer can impair early placentation and fetal growth, but this effect normalizes by term. In contrast, embryos cultured in vitro before transfer do not exhibit this compensation but rather display placental overgrowth, reduced fetal weight, reduced placental DNA methylation and increased levels of sFLT1, an anti-angiogenic protein implicated in causing the maternal symptoms of preeclampsia in humans. Increases in sFLT1 observed in this study suggest that IVF procedures could increase the risk for preeclampsia. Moreover, our results indicate that embryo culture is the major factor contributing to most placental abnormalities and should therefore be targeted for optimization.
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Affiliation(s)
- Lisa A Vrooman
- Epigenetics Institute, Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Eric A Rhon-Calderon
- Epigenetics Institute, Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Olivia Y Chao
- Epigenetics Institute, Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Duy K Nguyen
- Epigenetics Institute, Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Laren Narapareddy
- Epigenetics Institute, Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.,Department of Family and Community Health, Claire M. Fagin School of Nursing, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Asha K Dahiya
- Epigenetics Institute, Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Mary E Putt
- Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Richard M Schultz
- Department of Biology, School of Arts and Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Marisa S Bartolomei
- Epigenetics Institute, Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
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29
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Pierre WC, Legault L, Londono I, McGraw S, Lodygensky GA. Alteration of the brain methylation landscape following postnatal inflammatory injury in rat pups. FASEB J 2020; 34:432-445. [PMID: 31914673 PMCID: PMC6972494 DOI: 10.1096/fj.201901461r] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 09/26/2019] [Accepted: 10/08/2019] [Indexed: 12/18/2022]
Abstract
Preterm infants are vulnerable to inflammation-induced white matter injury (WMI), which is associated with neurocognitive impairment and increased risk of neuropsychiatric diseases in adulthood. Epigenetic mechanisms, particularly DNA methylation, play a role in normal development and modulate the response to pathological challenges. Our aims were to determine how WMI triggered DNA methylation alterations in brains of neonatal rats and if such changes persisted over time. We used a robust model of WMI by injecting lipopolysaccharide (LPS) or sterile saline in the corpus callosum of 3-day-old (P3) rat pups. Brains were collected 24 hours (P4) and 21 days post-injection (P24). We extracted genomic DNA from the brain to establish genome-wide quantitative DNA methylation profiles using reduced representation bisulfite sequencing. Neonatal LPS exposure induced a persistent increased methylation of genes related to nervous system development and a reduced methylation of genes associated with inflammatory pathways. These findings suggest that early-life neuroinflammatory exposure impacts the cerebral methylation landscape with determining widespread epigenetic modifications especially in genes related to neurodevelopment.
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Affiliation(s)
- Wyston C. Pierre
- Department of PediatricsUniversité de MontréalResearch Center of the CHU Sainte‐JustineMontréalQCCanada
| | - Lisa‐Marie Legault
- Department of Biochemistry and Molecular MedicineUniversité de MontréalResearch Center of the CHU Sainte‐JustineMontréalQCCanada
| | - Irene Londono
- Department of PediatricsUniversité de MontréalResearch Center of the CHU Sainte‐JustineMontréalQCCanada
| | - Serge McGraw
- Department of Biochemistry and Molecular MedicineUniversité de MontréalResearch Center of the CHU Sainte‐JustineMontréalQCCanada
- Department of Obstetrics & GynecologyUniversité de MontréalResearch Center of the CHU Sainte‐JustineMontréalQCCanada
| | - Gregory A. Lodygensky
- Department of PediatricsUniversité de MontréalResearch Center of the CHU Sainte‐JustineMontréalQCCanada
- Department of Pharmacology and PhysiologyUniversité de MontréalMontréalQCCanada
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