1
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Yao S, Prates K, Freydenzon A, Assante G, McRae AF, Morris MJ, Youngson NA. Liver-specific deletion of de novo DNA methyltransferases protects against glucose intolerance in high-fat diet-fed male mice. FASEB J 2024; 38:e23690. [PMID: 38795327 DOI: 10.1096/fj.202301546rr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 04/25/2024] [Accepted: 05/10/2024] [Indexed: 05/27/2024]
Abstract
Alterations to gene transcription and DNA methylation are a feature of many liver diseases including fatty liver disease and liver cancer. However, it is unclear whether the DNA methylation changes are a cause or a consequence of the transcriptional changes. It is even possible that the methylation changes are not required for the transcriptional changes. If DNA methylation is just a minor player in, or a consequence of liver transcriptional change, then future studies in this area should focus on other systems such as histone tail modifications. To interrogate the importance of de novo DNA methylation, we generated mice that are homozygous mutants for both Dnmt3a and Dnmt3b in post-natal liver. These mice are viable and fertile with normal sized livers. Males, but not females, showed increased adipose depots, yet paradoxically, improved glucose tolerance on both control diet and high-fat diets (HFD). Comparison of the transcriptome and methylome with RNA sequencing and whole-genome bisulfite sequencing in adult hepatocytes revealed that widespread loss of methylation in CpG-rich regions in the mutant did not induce loss of homeostatic transcriptional regulation. Similarly, extensive transcriptional changes induced by HFD did not require de novo DNA methylation. The improved metabolic phenotype of the Dnmt3a/3b mutant mice may be mediated through the dysregulation of a subset of glucose and fat metabolism genes which increase both glucose uptake and lipid export by the liver. However, further work is needed to confirm this.
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Affiliation(s)
- S Yao
- Department of Pharmacology, School of Biomedical Sciences, UNSW Sydney, Sydney, New South Wales, Australia
| | - K Prates
- Department of Pharmacology, School of Biomedical Sciences, UNSW Sydney, Sydney, New South Wales, Australia
- Department of Biotechnology, Genetics, and Cellular Biology, State University of Maringá, Maringá, Brazil
| | - A Freydenzon
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - G Assante
- Roger Williams Institute of Hepatology, Foundation for Liver Research, London, UK
- Faculty of Life Sciences and Medicine, King's College London, London, UK
| | - A F McRae
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - M J Morris
- Department of Pharmacology, School of Biomedical Sciences, UNSW Sydney, Sydney, New South Wales, Australia
| | - N A Youngson
- Department of Pharmacology, School of Biomedical Sciences, UNSW Sydney, Sydney, New South Wales, Australia
- Roger Williams Institute of Hepatology, Foundation for Liver Research, London, UK
- Faculty of Life Sciences and Medicine, King's College London, London, UK
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2
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Saavedra LPJ, Piovan S, Moreira VM, Gonçalves GD, Ferreira ARO, Ribeiro MVG, Peres MNC, Almeida DL, Raposo SR, da Silva MC, Barbosa LF, de Freitas Mathias PC. Epigenetic programming for obesity and noncommunicable disease: From womb to tomb. Rev Endocr Metab Disord 2024; 25:309-324. [PMID: 38040983 DOI: 10.1007/s11154-023-09854-w] [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] [Accepted: 11/15/2023] [Indexed: 12/03/2023]
Abstract
Several epidemiological, clinical and experimental studies in recent decades have shown the relationship between exposure to stressors during development and health outcomes later in life. The characterization of these susceptible phases, such as preconception, gestation, lactation and adolescence, and the understanding of factors that influence the risk of an adult individual for developing obesity, metabolic and cardiovascular diseases, is the focus of the DOHaD (Developmental Origins of Health and Disease) research line. In this sense, advancements in molecular biology techniques have contributed significantly to the understanding of the mechanisms underlying the observed phenotypes, their morphological and physiological alterations, having as a main driving factor the epigenetic modifications and their consequent modulation of gene expression. The present narrative review aimed to characterize the different susceptible phases of development and associated epigenetic modifications, and their implication in the development of non-communicable diseases. Additionally, we provide useful insights into interventions during development to counteract or prevent long-term programming for disease susceptibility.
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Affiliation(s)
- Lucas Paulo Jacinto Saavedra
- Department of Biotechnology, Genetics, and Cellular Biology, State University of Maringá, 5790 Av Colombo, Sala 19, Maringá, PR, 87020-900, Brazil
| | - Silvano Piovan
- Department of Biotechnology, Genetics, and Cellular Biology, State University of Maringá, 5790 Av Colombo, Sala 19, Maringá, PR, 87020-900, Brazil
| | - Veridiana Mota Moreira
- Department of Biotechnology, Genetics, and Cellular Biology, State University of Maringá, 5790 Av Colombo, Sala 19, Maringá, PR, 87020-900, Brazil
| | - Gessica Dutra Gonçalves
- Department of Biotechnology, Genetics, and Cellular Biology, State University of Maringá, 5790 Av Colombo, Sala 19, Maringá, PR, 87020-900, Brazil
| | - Anna Rebeka Oliveira Ferreira
- Department of Biotechnology, Genetics, and Cellular Biology, State University of Maringá, 5790 Av Colombo, Sala 19, Maringá, PR, 87020-900, Brazil
| | - Maiara Vanusa Guedes Ribeiro
- Department of Biotechnology, Genetics, and Cellular Biology, State University of Maringá, 5790 Av Colombo, Sala 19, Maringá, PR, 87020-900, Brazil
| | - Maria Natália Chimirri Peres
- Department of Biotechnology, Genetics, and Cellular Biology, State University of Maringá, 5790 Av Colombo, Sala 19, Maringá, PR, 87020-900, Brazil
| | - Douglas Lopes Almeida
- Department of Biotechnology, Genetics, and Cellular Biology, State University of Maringá, 5790 Av Colombo, Sala 19, Maringá, PR, 87020-900, Brazil
| | - Scarlett Rodrigues Raposo
- Department of Biotechnology, Genetics, and Cellular Biology, State University of Maringá, 5790 Av Colombo, Sala 19, Maringá, PR, 87020-900, Brazil
| | - Mariane Carneiro da Silva
- Department of Biotechnology, Genetics, and Cellular Biology, State University of Maringá, 5790 Av Colombo, Sala 19, Maringá, PR, 87020-900, Brazil
| | - Letícia Ferreira Barbosa
- Department of Biotechnology, Genetics, and Cellular Biology, State University of Maringá, 5790 Av Colombo, Sala 19, Maringá, PR, 87020-900, Brazil
| | - Paulo Cezar de Freitas Mathias
- Department of Biotechnology, Genetics, and Cellular Biology, State University of Maringá, 5790 Av Colombo, Sala 19, Maringá, PR, 87020-900, Brazil.
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3
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Maehara H, Kokaji T, Hatano A, Suzuki Y, Matsumoto M, Nakayama KI, Egami R, Tsuchiya T, Ozaki H, Morita K, Shirai M, Li D, Terakawa A, Uematsu S, Hironaka KI, Ohno S, Kubota H, Araki H, Miura F, Ito T, Kuroda S. DNA hypomethylation characterizes genes encoding tissue-dominant functional proteins in liver and skeletal muscle. Sci Rep 2023; 13:19118. [PMID: 37926704 PMCID: PMC10625943 DOI: 10.1038/s41598-023-46393-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 10/31/2023] [Indexed: 11/07/2023] Open
Abstract
Each tissue has a dominant set of functional proteins required to mediate tissue-specific functions. Epigenetic modifications, transcription, and translational efficiency control tissue-dominant protein production. However, the coordination of these regulatory mechanisms to achieve such tissue-specific protein production remains unclear. Here, we analyzed the DNA methylome, transcriptome, and proteome in mouse liver and skeletal muscle. We found that DNA hypomethylation at promoter regions is globally associated with liver-dominant or skeletal muscle-dominant functional protein production within each tissue, as well as with genes encoding proteins involved in ubiquitous functions in both tissues. Thus, genes encoding liver-dominant proteins, such as those involved in glycolysis or gluconeogenesis, the urea cycle, complement and coagulation systems, enzymes of tryptophan metabolism, and cytochrome P450-related metabolism, were hypomethylated in the liver, whereas those encoding-skeletal muscle-dominant proteins, such as those involved in sarcomere organization, were hypomethylated in the skeletal muscle. Thus, DNA hypomethylation characterizes genes encoding tissue-dominant functional proteins.
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Affiliation(s)
- Hideki Maehara
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan
| | - Toshiya Kokaji
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan
- Data Science Center, Nara Institute of Science and Technology, 8916‑5 Takayama, Ikoma, Nara, Japan
| | - Atsushi Hatano
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan
- Department of Omics and Systems Biology, Graduate School of Medical and Dental Sciences, Niigata University, 757 Ichibancho, Asahimachi-Dori, Chuo-Ku, Niigata City, Niigata, 951-8510, Japan
| | - Yutaka Suzuki
- Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8562, Japan
| | - Masaki Matsumoto
- Department of Omics and Systems Biology, Graduate School of Medical and Dental Sciences, Niigata University, 757 Ichibancho, Asahimachi-Dori, Chuo-Ku, Niigata City, Niigata, 951-8510, Japan
| | - Keiichi I Nakayama
- Department of Molecular and Cellular Biology, Medical Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Riku Egami
- Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8562, Japan
| | - Takaho Tsuchiya
- Bioinformatics Laboratory, Institute of Medicine, University of Tsukuba, Ibaraki, 305‑8575, Japan
- Center for Artificial Intelligence Research, University of Tsukuba, Ibaraki, 305‑8577, Japan
| | - Haruka Ozaki
- Bioinformatics Laboratory, Institute of Medicine, University of Tsukuba, Ibaraki, 305‑8575, Japan
- Center for Artificial Intelligence Research, University of Tsukuba, Ibaraki, 305‑8577, Japan
| | - Keigo Morita
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan
| | - Masaki Shirai
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan
| | - Dongzi Li
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan
| | - Akira Terakawa
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan
| | - Saori Uematsu
- Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8562, Japan
| | - Ken-Ichi Hironaka
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan
| | - Satoshi Ohno
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan
- Molecular Genetics Research Laboratory, Graduate School of Science, University of Tokyo, 7‑3‑1 Hongo, Bunkyo‑ku, Tokyo, 113‑0033, Japan
- Department of AI Systems Medicine, M&D Data Science Center, Tokyo Medical and Dental University, Tokyo, 113-8510, Japan
| | - Hiroyuki Kubota
- Division of Integrated Omics, Medical Research Center for High Depth Omics, Medical Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, Fukuoka, 812-8582, Japan
| | - Hiromitsu Araki
- Department of Biochemistry, Kyushu University Graduate School of Medical Sciences, Fukuoka, 812-8582, Japan
| | - Fumihito Miura
- Department of Biochemistry, Kyushu University Graduate School of Medical Sciences, Fukuoka, 812-8582, Japan
| | - Takashi Ito
- Department of Biochemistry, Kyushu University Graduate School of Medical Sciences, Fukuoka, 812-8582, Japan
| | - Shinya Kuroda
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan.
- Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8562, Japan.
- Molecular Genetics Research Laboratory, Graduate School of Science, University of Tokyo, 7‑3‑1 Hongo, Bunkyo‑ku, Tokyo, 113‑0033, Japan.
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4
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Ma J, Zhang L, Huang Y, Shen F, Wu H, Yang Z, Hou R, Song Z, Yue B, Zhang X. Epigenomic profiling indicates a role for DNA methylation in the postnatal liver and pancreas development of giant pandas. Genomics 2022; 114:110342. [PMID: 35306168 DOI: 10.1016/j.ygeno.2022.110342] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 02/14/2022] [Accepted: 03/13/2022] [Indexed: 01/14/2023]
Abstract
Giant pandas are unique within Carnivora with a strict bamboo diet. Here, the epigenomic profiles of giant panda liver and pancreas tissues collected from three important feeding stages were investigated using BS-seq. Few differences in DNA methylation profiles were exhibited between no feeding and suckling groups in both tissues. However, we observed a tendency toward a global loss of DNA methylation in the gene-body and promoter region of metabolism-related genes from newborn to adult. Correlation analysis revealed a significant negative correlation between the changes in methylation levels within gene promoters and gene expression. The majority of genes related to nutrition metabolism had lost DNA methylation with increased mRNA expression in adult giant pandas. The few galactose metabolism and unsaturated fatty acid metabolism related genes that were hypomethylated and highly-expressed at early stages of giant panda development may meet the nutritional requirement of this species' highly altricial neonates.
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Affiliation(s)
- Jinnan Ma
- Key Laboratory of Bio-resources and Eco-environment, Ministry of Education, College of Life Sciences, Sichuan University, No.24 South Section 1, Yihuan Road, Chengdu, Sichuan 610065, China
| | - Liang Zhang
- The Sichuan Key Laboratory for Conservation Biology of Endangered Wildlife, Chengdu Research Base of Giant Panda Breeding, 1375 Panda Road, Northern Suburb, Chengdu, Sichuan 610081, China
| | - Yan Huang
- China Conservation and Research Center for the Giant Panda, 98 Tongjiang Road, Dujiangyan, Chengdu, Sichuan 611800, China
| | - Fujun Shen
- The Sichuan Key Laboratory for Conservation Biology of Endangered Wildlife, Chengdu Research Base of Giant Panda Breeding, 1375 Panda Road, Northern Suburb, Chengdu, Sichuan 610081, China
| | - Honglin Wu
- China Conservation and Research Center for the Giant Panda, 98 Tongjiang Road, Dujiangyan, Chengdu, Sichuan 611800, China
| | - Zhisong Yang
- Sichuan Academy of Giant Panda, 1375 Panda Road, Northern Suburb, Chengdu, Sichuan 610081, China
| | - Rong Hou
- The Sichuan Key Laboratory for Conservation Biology of Endangered Wildlife, Chengdu Research Base of Giant Panda Breeding, 1375 Panda Road, Northern Suburb, Chengdu, Sichuan 610081, China
| | - Zhaobin Song
- Key Laboratory of Bio-resources and Eco-environment, Ministry of Education, College of Life Sciences, Sichuan University, No.24 South Section 1, Yihuan Road, Chengdu, Sichuan 610065, China
| | - Bisong Yue
- Key Laboratory of Bio-resources and Eco-environment, Ministry of Education, College of Life Sciences, Sichuan University, No.24 South Section 1, Yihuan Road, Chengdu, Sichuan 610065, China
| | - Xiuyue Zhang
- Key Laboratory of Bio-resources and Eco-environment, Ministry of Education, College of Life Sciences, Sichuan University, No.24 South Section 1, Yihuan Road, Chengdu, Sichuan 610065, China.
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5
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Aissa AF, Tryndyak VP, de Conti A, Rita Thomazela Machado A, Tuttis K, da Silva Machado C, Hernandes LC, Wellington da Silva Santos P, Mara Serpeloni J, P Pogribny I, Maria Greggi Antunes L. Epigenetic changes induced in mice liver by methionine-supplemented and methionine-deficient diets. Food Chem Toxicol 2022; 163:112938. [PMID: 35314295 DOI: 10.1016/j.fct.2022.112938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 03/10/2022] [Accepted: 03/16/2022] [Indexed: 02/07/2023]
Abstract
A diet deficient in donors of methyl group, such as methionine, affects DNA methylation and hepatic lipid metabolism. Methionine also affects other epigenetic mechanisms, such as microRNAs. We investigated the effects of methionine-supplemented or methionine-deficient diets on the expression of chromatin-modifying genes, global DNA methylation, the expression and methylation of genes related to lipid metabolism, and the expression of microRNAs in mouse liver. Female Swiss albino mice were fed a control diet (0.3% methionine), a methionine-supplemented diet (2% methionine), and a methionine-deficient diet (0% methionine) for 10 weeks. The genes most affected by the methionine-supplemented diet were associated with histone and DNA methyltransferases activity, while the methionine-deficient diet mostly altered the expression of histone methyltransferases genes. Both diets altered the global DNA methylation and the expression and gene-specific methylation of the lipid metabolism gene Apoa5. Both diets altered the expression of several liver homeostasis-related microRNAs, including miR-190b-5p, miR-130b-3p, miR-376c-3p, miR-411-5p, miR-29c-3p, miR-295-3p, and miR-467d-5p, with the methionine-deficient diet causing a more substantial effect. The effects of improper amounts of methionine in the diet on liver pathologies may involve a cooperative action of chromatin-modifying genes, which results in an aberrant pattern of global and gene-specific methylation, and microRNAs responsible for liver homeostasis.
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Affiliation(s)
- Alexandre Ferro Aissa
- Department of Genetics, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Volodymyr P Tryndyak
- Division of Biochemical Toxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, Jefferson, AR, USA
| | - Aline de Conti
- Division of Biochemical Toxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, Jefferson, AR, USA
| | - Ana Rita Thomazela Machado
- Departament of Clinical Analysis, Toxicology and Food Science, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Katiuska Tuttis
- Department of Genetics, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Carla da Silva Machado
- Department of Genetics, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Lívia Cristina Hernandes
- Departament of Clinical Analysis, Toxicology and Food Science, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Patrick Wellington da Silva Santos
- Departament of Clinical Analysis, Toxicology and Food Science, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Juliana Mara Serpeloni
- Department of General Biology, Center of Biological Sciences, State University of Londrina (UEL), Londrina, PR, Brazil
| | - Igor P Pogribny
- Division of Biochemical Toxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, Jefferson, AR, USA
| | - Lusânia Maria Greggi Antunes
- Departament of Clinical Analysis, Toxicology and Food Science, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
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6
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Asahara SI, Inoue H, Kido Y. Regulation of Pancreatic β-Cell Mass by Gene-Environment Interaction. Diabetes Metab J 2022; 46:38-48. [PMID: 35135077 PMCID: PMC8831821 DOI: 10.4093/dmj.2021.0045] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 05/28/2021] [Indexed: 11/15/2022] Open
Abstract
The main pathogenic mechanism of diabetes consists of an increase in insulin resistance and a decrease in insulin secretion from pancreatic β-cells. The number of diabetic patients has been increasing dramatically worldwide, especially in Asian people whose capacity for insulin secretion is inherently lower than that of other ethnic populations. Causally, changes of environmental factors in addition to intrinsic genetic factors have been considered to have an influence on the increased prevalence of diabetes. Particular focus has been placed on "gene-environment interactions" in the development of a reduced pancreatic β-cell mass, as well as type 1 and type 2 diabetes mellitus. Changes in the intrauterine environment, such as intrauterine growth restriction, contribute to alterations of gene expression in pancreatic β-cells, ultimately resulting in the development of pancreatic β-cell failure and diabetes. As a molecular mechanism underlying the effect of the intrauterine environment, epigenetic modifications have been widely investigated. The association of diabetes susceptibility genes or dietary habits with gene-environment interactions has been reported. In this review, we provide an overview of the role of gene-environment interactions in pancreatic β-cell failure as revealed by previous reports and data from experiments.
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Affiliation(s)
- Shun-ichiro Asahara
- Division of Diabetes and Endocrinology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hiroyuki Inoue
- Division of Medical Chemistry, Department of Metabolism and Diseases, Kobe University Graduate School of Health Sciences, Kobe, Japan
| | - Yoshiaki Kido
- Division of Diabetes and Endocrinology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
- Division of Medical Chemistry, Department of Metabolism and Diseases, Kobe University Graduate School of Health Sciences, Kobe, Japan
- Corresponding author: Yoshiaki Kido https://orcid.org/0000-0003-2433-5799 Department of Metabolism and Diseases, Kobe University Graduate School of Health Sciences, 7-10-2 Tomogaoka, Suma-ku, Kobe 654-0142, Japan E-mail:
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7
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Pang H, Ling D, Cheng Y, Akbar R, Jin L, Ren J, Wu H, Chen B, Zhou Y, Zhu H, Zhou Y, Huang H, Sheng J. Gestational high-fat diet impaired demethylation of Pparα and induced obesity of offspring. J Cell Mol Med 2021; 25:5404-5416. [PMID: 33955677 PMCID: PMC8184666 DOI: 10.1111/jcmm.16551] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 03/06/2021] [Accepted: 03/30/2021] [Indexed: 01/12/2023] Open
Abstract
Gestational and postpartum high‐fat diets (HFDs) have been implicated as causes of obesity in offspring in later life. The present study aimed to investigate the effects of gestational and/or postpartum HFD on obesity in offspring. We established a mouse model of HFD exposure that included gestation, lactation and post‐weaning periods. We found that gestation was the most sensitive period, as the administration of a HFD impaired lipid metabolism, especially fatty acid oxidation in both foetal and adult mice, and caused obesity in offspring. Mechanistically, the DNA hypermethylation level of the nuclear receptor, peroxisome proliferator‐activated receptor‐α (Pparα), and the decreased mRNA levels of ten‐eleven translocation 1 (Tet1) and/or ten‐eleven translocation 2 (Tet2) were detected in the livers of foetal and adult offspring from mothers given a HFD during gestation, which was also associated with low Pparα expression in hepatic cells. We speculated that the hypermethylation of Pparα resulted from the decreased Tet1/2 expression in mothers given a HFD during gestation, thereby causing lipid metabolism disorders and obesity. In conclusion, this study demonstrates that a HFD during gestation exerts long‐term effects on the health of offspring via the DNA demethylation of Pparα, thereby highlighting the importance of the gestational period in regulating epigenetic mechanisms involved in metabolism.
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Affiliation(s)
- Haiyan Pang
- Department of Reproductive Medicine, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,The Key Laboratory of Reproductive Genetics (Zhejiang University School of Medicine), Ministry of Education, Hangzhou, China
| | - Dandan Ling
- Department of Reproductive Medicine, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,The Key Laboratory of Reproductive Genetics (Zhejiang University School of Medicine), Ministry of Education, Hangzhou, China
| | - Yi Cheng
- Hospital of Obstetrics and Gynecology, Fudan University Shanghai Medical College, Shanghai, China
| | - Rubab Akbar
- Department of Pathology and Pathophysiology, School of Medicine, Zhejiang University, Hangzhou, China
| | - Luyang Jin
- Department of Reproductive Medicine, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,The Key Laboratory of Reproductive Genetics (Zhejiang University School of Medicine), Ministry of Education, Hangzhou, China
| | - Jun Ren
- Department of Reproductive Medicine, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Haiyan Wu
- Department of Reproductive Medicine, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,The Key Laboratory of Reproductive Genetics (Zhejiang University School of Medicine), Ministry of Education, Hangzhou, China
| | - Bin Chen
- Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yin Zhou
- Center for Reproductive Medicine, School of Medicine, the Second Affiliated Hospital, Zhejiang University, Hangzhou, China
| | - Hong Zhu
- Hospital of Obstetrics and Gynecology, Fudan University Shanghai Medical College, Shanghai, China
| | - Yuzhong Zhou
- The Key Laboratory of Reproductive Genetics (Zhejiang University School of Medicine), Ministry of Education, Hangzhou, China
| | - Hefeng Huang
- The Key Laboratory of Reproductive Genetics (Zhejiang University School of Medicine), Ministry of Education, Hangzhou, China.,Hospital of Obstetrics and Gynecology, Fudan University Shanghai Medical College, Shanghai, China
| | - Jianzhong Sheng
- The Key Laboratory of Reproductive Genetics (Zhejiang University School of Medicine), Ministry of Education, Hangzhou, China.,Department of Pathology and Pathophysiology, School of Medicine, Zhejiang University, Hangzhou, China
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8
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Cho YD, Kim WJ, Kim S, Ku Y, Ryoo HM. Surface Topography of Titanium Affects Their Osteogenic Potential through DNA Methylation. Int J Mol Sci 2021; 22:2406. [PMID: 33673700 PMCID: PMC7957554 DOI: 10.3390/ijms22052406] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 02/23/2021] [Accepted: 02/24/2021] [Indexed: 01/14/2023] Open
Abstract
It is widely accepted that sandblasted/large-grit/acid-etched (SLA) surfaces of titanium (Ti) have a higher osteogenic potential than machined ones. However, most studies focused on differential gene expression without elucidating the underlying mechanism for this difference. The aim of this study was to evaluate how the surface roughness of dental Ti implants affects their osteogenic potential. Mouse preosteoblast MC3T3-E1 cells were seeded on machined and SLA Ti discs. The cellular activities of the discs were analyzed using confocal laser scanning microscopy, proliferation assays, and real-time polymerase chain reaction (PCR). DNA methylation was evaluated using a methylation-specific PCR. The cell morphology was slightly different between the two types of surfaces. While cellular proliferation was slightly greater on the machined surfaces, the osteogenic response of the SLA surfaces was superior, and they showed increased alkaline phosphatase (Alp) activity and higher bone marker gene expression levels (Type I collagen, Alp, and osteocalcin). The degree of DNA methylation on the Alp gene was lower on the SLA surfaces than on the machined surfaces. DNA methyltransferase inhibitor stimulated the Alp gene expression on the machined surfaces, similar to the SLA surfaces. The superior osteogenic potential of the SLA surfaces can be attributed to a different epigenetic landscape, specifically, the DNA methylation of Alp genes. This finding offers novel insights into epigenetics to supplement genetics and raises the possibility of using epidrugs as potential therapeutic targets to enhance osteogenesis on implant surfaces.
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Affiliation(s)
- Young-Dan Cho
- Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University, and Seoul National University Dental Hospital, Seoul 03080, Korea; (Y.-D.C.); (S.K.); (Y.K.)
| | - Woo-Jin Kim
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul 08826, Korea;
| | - Sungtae Kim
- Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University, and Seoul National University Dental Hospital, Seoul 03080, Korea; (Y.-D.C.); (S.K.); (Y.K.)
| | - Young Ku
- Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University, and Seoul National University Dental Hospital, Seoul 03080, Korea; (Y.-D.C.); (S.K.); (Y.K.)
| | - Hyun-Mo Ryoo
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul 08826, Korea;
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Liao ZM, Li AN, Cai Y, Chen JJ, Xu Y, Sui LH, Wang JL, Jin P, Wang KS, Yang ZC. Skip participates in formation and lipid metabolism of beige adipose and might mediate the effects of SIRT1 activator BTM-0512 on beige remodeling. Biochem Biophys Res Commun 2021; 537:109-117. [PMID: 33388413 DOI: 10.1016/j.bbrc.2020.12.058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 12/17/2020] [Indexed: 11/16/2022]
Abstract
Dissipating energy by activating thermogenic adipose to combating obesity attracts many interests. Ski-interacting protein (Skip) has been known to play an important role in cell proliferation and differentiation, but whether it participates in energy metabolism is not known. Our previous study revealed that BTM-0512 could induce beige adipose formation, accompanying with up-regulation of Skip, but the role of Skip in metabolism was unknown. In this study, we mainly investigated whether Skip was involved in beige remodeling of subcutaneous white preadipocytes as well as in lipid metabolism of differentiated beige adipocytes. The results showed that in high fat diet-induced obesity mice, the protein levels of Skip in subcutaneous and visceral white adipose as well as in brown adipose were all down-regulated, especially in subcutaneous white adipose. Then we cultured subcutaneous adipose derived-stem cells (ADSCs) and found knock-down of Skip (siSkip) inhibited the expressions of thermogenic adipose specific genes including PRDM16 and UCP1 in both undifferentiated ADSCs and differentiated beige adipocytes, which could abolish the effects of BTM-0512 on beige remodeling. We further observed that siSkip affected multiple rate-limiting enzymes in lipid metabolism. The expressions of ACC, GPAT-1, HSL and ATGL were down-regulated, while CPT1α expression was up-regulated by siSkip. The expression of AMPK was also decreased by siSkip. In conclusion, our study demonstrated that Skip might play an important role in the beige remodeling of white adipocytes as well as lipid metabolism of beige adipose.
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Affiliation(s)
- Zhi-Mei Liao
- Department of Pharmacology, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
| | - An-Na Li
- Department of Pharmacology, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
| | - Yan Cai
- Department of Histology and Embryology, Xiangya School of Medicine, Central South University, Changsha, 410013, China
| | - Jun-Jun Chen
- Department of Pharmacology, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
| | - Yao Xu
- Department of Pharmacology, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
| | - Li-Hua Sui
- Department of Pharmacology, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
| | - Jian-Ling Wang
- Department of Pharmacology, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
| | - Ping Jin
- Department of Endocrinology, The Third Xiangya Hospital, Central South University, Changsha, 410013, China
| | - Kuan-Song Wang
- Department of Pathology, The Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Zhi-Chun Yang
- Department of Pharmacology, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China; Hunan Provincial Key Laboratory of Cardiovascular Research, Changsha, 410078, China.
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10
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Kim YC, Seok S, Zhang Y, Ma J, Kong B, Guo G, Kemper B, Kemper JK. Intestinal FGF15/19 physiologically repress hepatic lipogenesis in the late fed-state by activating SHP and DNMT3A. Nat Commun 2020; 11:5969. [PMID: 33235221 PMCID: PMC7686350 DOI: 10.1038/s41467-020-19803-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 10/16/2020] [Indexed: 12/13/2022] Open
Abstract
Hepatic lipogenesis is normally tightly regulated but is aberrantly elevated in obesity. Fibroblast Growth Factor-15/19 (mouse FGF15, human FGF19) are bile acid-induced late fed-state gut hormones that decrease hepatic lipid levels by unclear mechanisms. We show that FGF15/19 and FGF15/19-activated Small Heterodimer Partner (SHP/NR0B2) have a role in transcriptional repression of lipogenesis. Comparative genomic analyses reveal that most of the SHP cistrome, including lipogenic genes repressed by FGF19, have overlapping CpG islands. FGF19 treatment or SHP overexpression in mice inhibits lipogenesis in a DNA methyltransferase-3a (DNMT3A)-dependent manner. FGF19-mediated activation of SHP via phosphorylation recruits DNMT3A to lipogenic genes, leading to epigenetic repression via DNA methylation. In non-alcoholic fatty liver disease (NAFLD) patients and obese mice, occupancy of SHP and DNMT3A and DNA methylation at lipogenic genes are low, with elevated gene expression. In conclusion, FGF15/19 represses hepatic lipogenesis by activating SHP and DNMT3A physiologically, which is likely dysregulated in NAFLD. Hepatic lipogenesis is a tightly regulated process, which is elevated in obesity. Here the authors report that FGF15/19, bile acid-induced gut hormones, repress lipogenic genes in the late fed-state by activating small heterodimer partner (SHP) and promoting SHP-dependent recruitment of DNA methyltransferase DNMT3A to lipogenic genes.
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Affiliation(s)
- Young-Chae Kim
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Sunmi Seok
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Yang Zhang
- Computational Biology Department, School of Computer Science, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Jian Ma
- Computational Biology Department, School of Computer Science, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Bo Kong
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, NJ, 08854, USA
| | - Grace Guo
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, NJ, 08854, USA
| | - Byron Kemper
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Jongsook Kim Kemper
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
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Yamasaki S, Kimura G, Koizumi K, Dai N, Ketema RM, Tomihara T, Ueno Y, Ohno Y, Sato S, Kurasaki M, Hosokawa T, Saito T. Maternal green tea extract intake during lactation attenuates hepatic lipid accumulation in adult male rats exposed to a continuous high-fat diet from the foetal period. Food Nutr Res 2020; 64:5231. [PMID: 34908919 PMCID: PMC8634344 DOI: 10.29219/fnr.v64.5231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 06/18/2020] [Accepted: 06/24/2020] [Indexed: 11/30/2022] Open
Abstract
Background Maternal lipid intake in the early postnatal period has a long-term effect on the possibility of fatty liver formation in children; besides, the importance of lipid consumption during lactation for children’s health has been suggested. Green tea extract (GTE) contains abundant catechins, and it has been reported to improve lipid metabolism and prevent fatty liver. Objective The aim of this study was to examine the effects of maternal GTE intake during lactation on hepatic lipid accumulation in adult male rats exposed to a continuous high-fat (HF) diet from the foetal period. Methods Pregnant Wistar rats received diets containing 13% (control-fat, CON) or 45% (high-fat, HF) fat. CON-fed mothers received the same diet during lactation, whereas HF-fed mothers received either HF diet alone or HF diet supplemented with 0.24% GTE. At weaning, male offspring were divided into three groups, i.e. CON/CON/CON, HF/HF/HF (HF-offspring) or HF/HF+GTE/HF (GTE-offspring), and were fed until 51 weeks. Results A significant hepatic triglyceride (Tg) accumulation was observed in the HF-offspring when compared with the other offspring. This is presumed to be caused by the promotion of Tg synthesis derived from exogenous fatty acid due to a significant increase in diacylglycerol O-acyltransferase 1 and a decrease in Tg expenditure caused by decreasing microsomal triglyceride transfer protein (MTTP) and long-chain acyl-CoA dehydrogenase. On the other hand, attenuated hepatic Tg accumulation was observed in the GTE-offspring. The levels of the hepatic lipid metabolism-related enzymes were improved to the same level as the CON-offspring, and particularly, MTTP was significantly increased as compared with the HF-offspring. Conclusion This study indicates the potential protective effects of maternal GTE intake during lactation on HF diet-induced hepatic lipid accumulation in adult male rat offspring and the possible underlying mechanisms.
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Affiliation(s)
- Shojiro Yamasaki
- Graduate School of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Goh Kimura
- Graduate School of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Kazunari Koizumi
- Graduate School of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Ning Dai
- Graduate School of Health Sciences, Hokkaido University, Sapporo, Japan
| | | | - Tomomi Tomihara
- Graduate School of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Yukako Ueno
- Graduate School of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Yuki Ohno
- Graduate School of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Shin Sato
- Department of Nutrition, Aomori University of Health and Welfare, Aomori, Japan
| | - Masaaki Kurasaki
- Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Japan
| | - Toshiyuki Hosokawa
- Institute for the Advancement of Higher Education, Hokkaido University, Sapporo, Japan
| | - Takeshi Saito
- Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
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12
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Krause C, Geißler C, Tackenberg H, El Gammal AT, Wolter S, Spranger J, Mann O, Lehnert H, Kirchner H. Multi-layered epigenetic regulation of IRS2 expression in the liver of obese individuals with type 2 diabetes. Diabetologia 2020; 63:2182-2193. [PMID: 32710190 PMCID: PMC7476982 DOI: 10.1007/s00125-020-05212-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 04/30/2020] [Indexed: 12/15/2022]
Abstract
AIMS/HYPOTHESIS IRS2 is an important molecular switch that mediates insulin signalling in the liver. IRS2 dysregulation is responsible for the phenomenon of selective insulin resistance that is observed in type 2 diabetes. We hypothesise that epigenetic mechanisms are involved in the regulation of IRS2 in the liver of obese and type 2 diabetic individuals. METHODS DNA methylation of seven CpG sites was studied by bisulphite pyrosequencing and mRNA and microRNA (miRNA) expression was assessed by quantitative real-time PCR in liver biopsies of 50 obese non-diabetic and 31 obese type 2 diabetic participants, in a cross-sectional setting. Methylation-sensitive luciferase assays and electrophoretic mobility shift assays were performed. Furthermore, HepG2 cells were treated with insulin and high glucose concentrations to induce miRNA expression and IRS2 downregulation. RESULTS We found a significant downregulation of IRS2 expression in the liver of obese individuals with type 2 diabetes (0.84 ± 0.08-fold change; p = 0.0833; adjusted p value [pa] = 0.0417; n = 31) in comparison with non-diabetic obese participants (n = 50). This downregulation correlated with hepatic IRS2 DNA methylation at CpG5. Additionally, CpG6, which is located in intron 1 of IRS2, was hypomethylated in type 2 diabetes; this site spans the sterol regulatory element binding transcription factor 1 (SREBF1) recognition motif, which likely acts as transcriptional repressor. The adjacent polymorphism rs4547213 (G>A) was significantly associated with DNA methylation at a specificity-protein-1 (SP1) binding site (CpG3). Moreover, DNA methylation of cg25924746, a CpG site located in the shore region of the IRS2 promoter-associated CpG island, was increased in the liver of individuals with type 2 diabetes, as compared with those without diabetes. A second epigenetic mechanism, upregulation of hepatic miRNA hsa-let-7e-5p (let-7e-5p) in obese individuals with type 2 diabetes (n = 29) vs non-diabetic obese individuals (n = 49) (1.2 ± 0.08-fold change; p = 0.0332; pa = 0.0450), is likely to act synergistically with altered IRS2 DNA methylation to decrease IRS2 expression. Mechanistic in vitro experiments demonstrated an acute upregulation of let-7e-5p expression and simultaneous IRS2 downregulation in a liver (HepG2) cell line upon hyperinsulinaemic and hyperglycaemic conditions. CONCLUSIONS/INTERPRETATION Our study highlights a new multi-layered epigenetic network that could be involved in subtle dysregulation of IRS2 in the liver of individuals with type 2 diabetes. This might lead to fine-tuning of IRS2 expression and is likely to be supplementary to the already known factors regulating IRS2 expression. Thereby, our findings could support the discovery of new diagnostic and therapeutic strategies for type 2 diabetes. Graphical abstract.
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Affiliation(s)
- Christin Krause
- First Department of Medicine, Division of Epigenetics and Metabolism, University of Lübeck, Ratzeburger Allee 160, 23562, Lübeck, Germany
| | - Cathleen Geißler
- First Department of Medicine, Division of Epigenetics and Metabolism, University of Lübeck, Ratzeburger Allee 160, 23562, Lübeck, Germany
| | - Heidi Tackenberg
- First Department of Medicine, Division of Epigenetics and Metabolism, University of Lübeck, Ratzeburger Allee 160, 23562, Lübeck, Germany
| | - Alexander T El Gammal
- Department of General, Visceral and Thoracic Surgery, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany
| | - Stefan Wolter
- Department of General, Visceral and Thoracic Surgery, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany
| | - Joachim Spranger
- Department of Endocrinology and Metabolism, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Oliver Mann
- Department of General, Visceral and Thoracic Surgery, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany
| | - Hendrik Lehnert
- First Department of Medicine, Division of Epigenetics and Metabolism, University of Lübeck, Ratzeburger Allee 160, 23562, Lübeck, Germany
- German Center for Diabetes Research (DZD), München-Neuherberg, Germany
| | - Henriette Kirchner
- First Department of Medicine, Division of Epigenetics and Metabolism, University of Lübeck, Ratzeburger Allee 160, 23562, Lübeck, Germany.
- German Center for Diabetes Research (DZD), München-Neuherberg, Germany.
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Abe T, Yamamoto S, Konishi T, Takahashi Y, Oishi K. Maternal fish oil supplementation ameliorates maternal high-fructose diet-induced dyslipidemia in neonatal mice with suppression of lipogenic gene expression in livers of postpartum mice. Nutr Res 2020; 82:34-43. [PMID: 32950780 DOI: 10.1016/j.nutres.2020.07.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 07/06/2020] [Accepted: 07/08/2020] [Indexed: 02/06/2023]
Abstract
Maternal fructose consumption during pregnancy and lactation is associated with metabolic dysregulation in offspring. We tested the hypothesis that fish oil (FO) supplementation during pregnancy and lactation improves fructose-induced metabolic dysregulation in postpartum dams and offspring mice. We therefore aimed to determine the effects of FO supplementation on metabolic disruption in neonatal mice and dams induced by a maternal high-fructose diet (HFrD). The weight of the offspring of dams fed with HFrD on postnatal day 5 was significantly low, but this was reversed by adding FO to the maternal diet. Feeding dams with HFrD significantly increased plasma concentrations of triglycerides, uric acid, and total cholesterol, and decreased free fatty acid concentrations in offspring. Maternal supplementation with FO significantly suppressed HFrD-induced hypertriglyceridemia and hyperuricemia in the offspring. Maternal HFrD induced remarkable mRNA expression of the lipogenic genes Srebf1, Fasn, Acc1, Scd1, and Acly in the postpartum mouse liver without affecting hepatic and plasma lipid levels. Although expression levels of lipogenic genes were higher in the livers of postpartum dams than in those of nonmated mice, HFrD feeding increased the hepatic lipid accumulation in nonmated mice but not in postpartum dams. These findings suggest that although hepatic lipogenic activity is higher in postpartum dams than nonmated mice, the lipid consumption is enhanced in postpartum dams during pregnancy and lactation. Maternal FO supplementation obviously suppressed the expression of these lipogenic genes. These findings coincide with reduced plasma triglyceride concentrations in the offspring. Therefore, dietary FO apparently ameliorated maternal HFrD-induced dyslipidemia in offspring by suppressing maternal lipogenic gene expression and/or neonatal plasma levels of uric acid.
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Affiliation(s)
- Tomoki Abe
- Healthy Food Science Research Group, Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8566, Japan.
| | - Saori Yamamoto
- Healthy Food Science Research Group, Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8566, Japan.
| | - Tatsuya Konishi
- Maruha Nichiro Corporation, Tsukuba, Ibaraki 300-4295, Japan.
| | | | - Katsutaka Oishi
- Healthy Food Science Research Group, Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8566, Japan; Department of Applied Biological Science, Graduate School of Science and Technology, Tokyo University of Science, Noda, Chiba 278-8510, Japan; Department of Computational and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-0882, Japan; School of Integrative and Global Majors (SIGMA), University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan.
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Targeted DNA demethylation of the Fgf21 promoter by CRISPR/dCas9-mediated epigenome editing. Sci Rep 2020; 10:5181. [PMID: 32198422 PMCID: PMC7083849 DOI: 10.1038/s41598-020-62035-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 03/06/2020] [Indexed: 11/08/2022] Open
Abstract
Recently, we reported PPARα-dependent DNA demethylation of the Fgf21 promoter in the postnatal mouse liver, where reduced DNA methylation is associated with enhanced gene expression after PPARα activation. However, there is no direct evidence for the effect of site-specific DNA methylation on gene expression. We employed the dCas9-SunTag and single-chain variable fragment (scFv)-TET1 catalytic domain (TET1CD) system to induce targeted DNA methylation of the Fgf21 promoter both in vitro and in vivo. We succeeded in targeted DNA demethylation of the Fgf 21 promoter both in Hepa1-6 cells and PPARα-deficient mice, with increased gene expression response to PPARα synthetic ligand administration and fasting, respectively. This study provides direct evidence that the DNA methylation status of a particular gene may determine the magnitude of the gene expression response to activation cues.
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Functional Analysis of Genes Involved in Glycerolipids Biosynthesis ( GPAT1 and GPAT2) in Pigs. Animals (Basel) 2019; 9:ani9060308. [PMID: 31159297 PMCID: PMC6617006 DOI: 10.3390/ani9060308] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Revised: 05/27/2019] [Accepted: 05/28/2019] [Indexed: 01/02/2023] Open
Abstract
Simple Summary Pork consumption is the highest among all meats in Poland and in the world. Current breeding programs were designed to obtain high meat content and low levels of fat in pork carcasses. This resulted in a decrease in the quality of meat. Numerous researchers indicated that intramuscular fat content (IMF) is the determining factor for meat quality and consumer’s acceptance of meat. The genes GPAT1 and GPAT2, being the objective of this study are involved in triacylglycerol (TAG) synthesis. TAGs are the main constituents of animal fat as well as of IMF. The aim of this study was to assess the expression level of the GPAT1 and GPAT2 genes in musculus longissimus lumborum, subcutaneous fat and liver of pigs. Moreover, association analysis between the genes’ expression, production traits, quality and sensory parameters of pork was carried out. The results obtained showed significant differences in the mRNA expression of analyzed genes between tissues and breeds of pigs. Furthermore, association analysis showed significant associations between expression level of the genes and some of the production traits, sensory and quality parameters of pork. The results of this study indicated the possibility of modification of desired traits through transcriptional control of gene expression. Abstract Glycerol-3-phosphate acyltransferase (GPAT) enzymes catalyze the first step in triacylglycerol (TAG) synthesis. Genes that belong to the GPAT family are potential genetic markers for intramuscular fat content (IMF) content and thus meat quality. The objective of this study was to analyze the expression of GPAT1 and GPAT2 genes in musculus longissimus lumborum, liver and subcutaneous fat of various breeds of pigs. Furthermore, correlations between the genes’ expression abundance and utility traits, meat quality and meat texture parameters of pork were determined. The results obtained showed significant differences in the mRNA level of GPAT1 between analyzed tissues and breeds. The highest expression of GPAT1 gene was observed in liver tissue (p ≤ 0.01). Furthermore, significantly higher GPAT1 transcript level in the m. longissimus lumborum was observed for duroc in comparison to other analyzed breeds (p ≤ 0.05). Expression of the GPAT2 gene was shown only in the liver tissues, however statistically significant differences between the analyzed breeds were not observed. Correlation analysis confirmed the highest association between GPAT2 gene expression level in liver and cohesiveness and resilience traits of m. longissimus lumborum (p ≤ 0.01).
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Transcriptional Regulation of Acyl-CoA:Glycerol- sn-3-Phosphate Acyltransferases. Int J Mol Sci 2019; 20:ijms20040964. [PMID: 30813330 PMCID: PMC6412627 DOI: 10.3390/ijms20040964] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 02/14/2019] [Accepted: 02/15/2019] [Indexed: 12/13/2022] Open
Abstract
Acyl-CoA:glycerol-sn-3-phosphate acyltransferase (GPAT) is an enzyme responsible for the rate-limiting step in the synthesis of glycerophospholipids and triacylglycerol (TAG). The enzymes of mammalian species are classified into four isoforms; GPAT1 and GPAT2 are localized in the mitochondrial outer membrane, whereas GPAT3 and GPAT4 are localized in the endoplasmic reticulum membrane. The activity of each enzyme expressed is associated with physiological and pathological functions. The transcriptional regulation is well known, particularly in GPAT1. GPAT1 mRNA expression is mainly regulated by the binding of the transcriptional factor SREBP-1c to the specific element (the sterol regulatory element) flanking the GPAT1 promoter. The TAG level is controlled by the insulin-induced transcriptional expression of GPAT1, which occupies most of the GPAT activity in the liver. The transcriptional regulation of the other three GPAT isoforms remains undetermined in detail. It is predicted that retinoic acid serves as a transcription factor in the GPAT2 promoter. PPARγ (peroxisome proliferator-activated receptor γ) increases the mRNA expression of GPAT3, which is associated with TAG synthesis in adipose tissues. Although GPAT has been considered to be a key enzyme in the production of TAG, unexpected functions have recently been reported, particularly in GPAT2. It is likely that GPAT2 is associated with tumorigenesis and normal spermatogenesis. In this review, the physiological and pathophysiological roles of the four GPAT isoforms are described, alongside the transcriptional regulation of these enzymes.
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Moody L, Xu GB, Chen H, Pan YX. Epigenetic regulation of carnitine palmitoyltransferase 1 (Cpt1a) by high fat diet. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2018; 1862:141-152. [PMID: 30605728 DOI: 10.1016/j.bbagrm.2018.12.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 12/22/2018] [Accepted: 12/27/2018] [Indexed: 12/15/2022]
Abstract
Carnitine palmitoyltransferase 1 (Cpt1a) is a rate-limiting enzyme that mediates the transport of fatty acids into the mitochondria for subsequent beta-oxidation. The objective of this study was to uncover how diet mediates the transcriptional regulation of Cpt1a. Pregnant Sprague Dawley rats were exposed to either a high-fat (HF) or low-fat control diet during gestation and lactation. At weaning, male offspring received either a HF or control diet, creating 4 groups: lifelong control diet (C/C; n = 12), perinatal HF diet (HF/C; n = 9), post-weaning HF diet (C/HF; n = 10), and lifelong HF diet (HF/HF; n = 10). Only HF/HF animals had higher hepatic Cpt1a mRNA expression than C/C. Epigenetic analysis revealed reduced DNA methylation (DNAMe) and increased histone 3 lysine 4 dimethylation (H3K4Me2) upstream and within the promoter of Cpt1a in the HF/HF group. This was accompanied by increased peroxisome proliferator activated receptor alpha (PPARα) and CCAAT/enhancer binding protein beta (C/EBPβ) binding directly downstream of the Cpt1a transcription start site within the first intron. Findings were confirmed in rat hepatoma H4IIEC3 cells treated with non-esterified fatty acid (NEFA). After 12 h of NEFA treatment, there was an enrichment of SWI/SNF related matrix associated actin dependent regulator of chromatin subfamily D member 1 (BAF60a or SMARCD1) in the first intron of Cpt1a. We conclude that dietary fat elevates hepatic Cpt1a expression via a highly coordinated transcriptional mechanism involving increased H3K4Me2, reduced DNAMe, and recruitment of C/EBPβ, PPARα, PGC1α, and BAF60a to the gene.
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Affiliation(s)
- Laura Moody
- Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States of America.
| | - Guanying Bianca Xu
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States of America.
| | - Hong Chen
- Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States of America; Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States of America.
| | - Yuan-Xiang Pan
- Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States of America; Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States of America; Illinois Informatics Institute, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States of America.
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Yang S, Yin RX, Miao L, Zhang QH, Zhou YG, Wu J. Association between the GPAM rs1129555 SNP and serum lipid profiles in the Maonan and Han populations. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2018; 11:1484-1498. [PMID: 31938246 PMCID: PMC6958110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Accepted: 01/30/2018] [Indexed: 06/10/2023]
Abstract
The glycerol-3-phosphate acyltransferase mitochondrial gene (GPAM) variant has been associated with serum lipid levels in the Eurpean ancestry, but little is known about such association in Chinese populations. The aim of the present study was to investigate the relationship between the GPAM rs1129555 single nucleotide polymorphism (SNP) and several environment factors with blood lipid profiles in the Guangxi Maonan and Han populations. A total of 720 individuals of Maonan nationality and 780 participants of Han nationality were randomly selected from our previous stratified randomized samples. Genotyping of the rs1129555 SNP was carried out using the polymerase chain reaction-restriction fragment length polymorphism technique, and then confirmed by direct sequencing. The frequencies of C and T alleles were 72.85% and 27.15% in Maonan, and 65.19% and 34.81% in Han (P < 0.001); respectively. The frequencies of CC, CT, and TT genotypes were 51.53%, 42.36%, and 5.97% in Maonan, and 43.08%, 44.23%, and 12.69% in Han populations (P < 0.001). The T allele carriers had higher serum triglyceride (TG) in Han and higher low-density lipoprotein cholesterol (LDL-C) in both Maonan and Han than the T allele non-carriers (P < 0.05-0.01). Gender subgroup analyses showed that the T allele carriers had higher TG levels in Han males (P < 0.05) and higher LDL-C levels in Maonan males but not in famales (P < 0.01). Serum lipid parameters were also associated with several environmental factors (P < 0.05-0.001). These findings suggest that racial/ethnic- and/or gender-specific association occurs between the GPAM rs1129555 variant and serum lipid parameters in our study populations.
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Affiliation(s)
- Shuo Yang
- Department of Cardiology, Institute of Cardiovascular Diseases, The First Affiliated Hospital, Guangxi Medical University Nanning 530021, Guangxi, China
| | - Rui-Xing Yin
- Department of Cardiology, Institute of Cardiovascular Diseases, The First Affiliated Hospital, Guangxi Medical University Nanning 530021, Guangxi, China
| | - Liu Miao
- Department of Cardiology, Institute of Cardiovascular Diseases, The First Affiliated Hospital, Guangxi Medical University Nanning 530021, Guangxi, China
| | - Qing-Hui Zhang
- Department of Cardiology, Institute of Cardiovascular Diseases, The First Affiliated Hospital, Guangxi Medical University Nanning 530021, Guangxi, China
| | - Yong-Gang Zhou
- Department of Cardiology, Institute of Cardiovascular Diseases, The First Affiliated Hospital, Guangxi Medical University Nanning 530021, Guangxi, China
| | - Jie Wu
- Department of Cardiology, Institute of Cardiovascular Diseases, The First Affiliated Hospital, Guangxi Medical University Nanning 530021, Guangxi, China
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Epigenetic modulation of Fgf21 in the perinatal mouse liver ameliorates diet-induced obesity in adulthood. Nat Commun 2018; 9:636. [PMID: 29434210 PMCID: PMC5809372 DOI: 10.1038/s41467-018-03038-w] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Accepted: 01/15/2018] [Indexed: 01/03/2023] Open
Abstract
The nutritional environment to which animals are exposed in early life can lead to epigenetic changes in the genome that influence the risk of obesity in later life. Here, we demonstrate that the fibroblast growth factor-21 gene (Fgf21) is subject to peroxisome proliferator-activated receptor (PPAR) α-dependent DNA demethylation in the liver during the postnatal period. Reductions in Fgf21 methylation can be enhanced via pharmacologic activation of PPARα during the suckling period. We also reveal that the DNA methylation status of Fgf21, once established in early life, is relatively stable and persists into adulthood. Reduced DNA methylation is associated with enhanced induction of hepatic FGF21 expression after PPARα activation, which may partly explain the attenuation of diet-induced obesity in adulthood. We propose that Fgf21 methylation represents a form of epigenetic memory that persists into adulthood, and it may have a role in the developmental programming of obesity.
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Epigenetic Switching and Neonatal Nutritional Environment. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1012:19-25. [PMID: 29956191 DOI: 10.1007/978-981-10-5526-3_3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The hepatic metabolic function changes sequentially during early life in mammals to adapt to the drastic changes in the nutritional environment. Accordingly, hepatic fatty acid β-oxidation is activated after birth to produce energy from breast milk lipids. De novo lipogenesis is induced upon the onset of oral intake, when the major nutritional source switches to carbohydrate. However, how a particular metabolic pathway is activated during the liver maturation is poorly understood. We found that the expression of glycerol-3-phosphate acyltransferase 1 (GPAT1), a rate-limiting enzyme of de novo hepatic lipogenesis, is epigenetically regulated in the mouse liver by DNA methylation. In the neonatal liver, DNA methylation of the GPAT1 gene (Gpam) promoter, which is likely to be induced by DNA methyltransferase (Dnmt) 3b, inhibited the recruitment of sterol regulatory element-binding protein-1c (SREBP-1c), whereas in the adult, decreased DNA methylation resulted in active chromatin conformation, allowing the recruitment of SREBP-1c. Maternal nutritional environment affects the DNA methylation status in the Gpam promoter, GPAT1 expression, and triglyceride content in the liver of the offspring. We also found DNA demethylation and increased mRNA expression of the fatty acid β-oxidation genes in the postnatal mouse liver. The DNA demethylation is specifically induced in the lactation period. Analysis of mice deficient in the nuclear receptor peroxisome proliferator-activated receptor α (PPARα) and maternal administration of a PPARα ligand during the gestation and lactation periods reveals that the DNA demethylation is PPARα-dependent. These findings indicate the gene- and lifestage-specific DNA demethylation of a particular metabolic pathway in the neonatal liver to adapt the marked changes in nutritional environment in early life.
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Mochizuki K, Hariya N, Honma K, Goda T. Relationship between epigenetic regulation, dietary habits, and the developmental origins of health and disease theory. Congenit Anom (Kyoto) 2017; 57:184-190. [PMID: 28169463 DOI: 10.1111/cga.12213] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Accepted: 01/24/2017] [Indexed: 12/19/2022]
Abstract
Environmental stressors during developmental stages are hypothesized to increase the risk of developing metabolic diseases such as obesity, type 2 diabetes, hypertension, and psychiatric diseases during later life. This theory is known as the Developmental Origins of Health and Disease (DOHaD). Recent studies suggest that accumulation of environmental stress, including those during developmental stages, is internalized as acquired information designated as "epigenetic memory." This epigenetic memory is generally indicated as DNA methylation and histone modifications in the chromatin. In general, the demethylation of CpG islands induces histone acetylation and associated changes from heterochromatin to euchromatin, and enhances transcriptional activation. These changes are induced by the binding of transcriptional factors to cis-elements located on promoter and enhancer regions and the associated binding of histone acetyl-transferase and the transcription initiation complex. Recent studies have demonstrated novel epigenetic modifications that regulate transcription elongation steps by activating histone acetylation and bromodomain-containing protein 4, which contains two bromodomains to bind acetylated histones, on the gene body (transcribed region). Gene expression alterations induced by carbohydrate signals and by changes in energy balance in the body are regulated by this model. In addition, induction of many metabolic genes, which are induced or reduced in adulthood by malnutrition during developmental stages, by intake of major nutrients, or development of lifestyle diseases in adulthood, are targeted by these novel epigenetic changes. In the present review, we introduce epigenetic regulations and the relationship with nutrient intake, and discuss links between epigenetic regulation and the development of metabolic diseases according to DOHaD.
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Affiliation(s)
- Kazuki Mochizuki
- Department of Local Produce and Food Sciences, Faculty of Life and Environmental Sciences, University of Yamanashi, Kofu, Japan
| | - Natsuyo Hariya
- Department of Epigenetic Medicine, Faculty of Medicine, University of Yamanashi, Chuo, Yamanashi, Japan
| | - Kazue Honma
- Laboratory of Nutritional Physiology, Graduate School of Nutritional and Environmental Sciences, University of Shizuoka, Shizuoka, Japan
| | - Toshinao Goda
- Laboratory of Nutritional Physiology, Graduate School of Nutritional and Environmental Sciences, University of Shizuoka, Shizuoka, Japan
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How lipid droplets "TAG" along: Glycerolipid synthetic enzymes and lipid storage. Biochim Biophys Acta Mol Cell Biol Lipids 2017. [PMID: 28642195 DOI: 10.1016/j.bbalip.2017.06.010] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Triacylglycerols (TAG) serve as the predominant form of energy storage in mammalian cells, and TAG synthesis influences conditions such as obesity, fatty liver, and insulin resistance. In most tissues, the glycerol 3-phosphate pathway enzymes are responsible for TAG synthesis, and the regulation and function of these enzymes is therefore important for metabolic homeostasis. Here we review the sites and regulation of glycerol-3-phosphate acyltransferase (GPAT), acylglycerol-3-phosphate acyltransferase (AGPAT), lipin phosphatidic acid phosphatase (PAP), and diacylglycerol acyltransferase (DGAT) enzyme action. We highlight the critical roles that these enzymes play in human health by reviewing Mendelian disorders that result from mutation in the corresponding genes. We also summarize the valuable insights that genetically engineered mouse models have provided into the cellular and physiological roles of GPATs, AGPATs, lipins and DGATs. Finally, we comment on the status and feasibility of therapeutic approaches to metabolic disease that target enzymes of the glycerol 3-phosphate pathway. This article is part of a Special Issue entitled: Recent Advances in Lipid Droplet Biology edited by Rosalind Coleman and Matthijs Hesselink.
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Yu H, Zhao Z, Yu X, Li J, Lu C, Yang R. Bovine lipid metabolism related gene GPAM: Molecular characterization, function identification, and association analysis with fat deposition traits. Gene 2017; 609:9-18. [DOI: 10.1016/j.gene.2017.01.031] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 01/23/2017] [Accepted: 01/24/2017] [Indexed: 11/28/2022]
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Abstract
Type 2 diabetes is a typical multifactorial disease, but the causes can largely be divided into genetic and environmental factors. In recent years, focus has shifted to the interaction between these factors (i.e., gene-environment interactions). It has become widely known that changes in the intrauterine environment such as intrauterine growth restriction result in gene expression changes in various tissues, which ultimately lead to the onset of diabetes. Epigenetic modification is considered to be a particularly important mechanism in these effects, as it is easily affected by environmental changes that occur during the fetal and neonatal periods. Moreover, recent reports have revealed that epigenetic modifications are passed down through generations. Although genome-wide association studies have identified many type 2 diabetes susceptibility genes, these genes do not pose a significantly high risk when isolated as single factors. In particular, it has been suggested that the interaction of the FTO or KCNQ1 genes with environmental factors increases the incidence of diabetes. These findings suggest that detailed analyses of individual gene-environment interactions hold promise for gaining new insight into the mechanisms and risk factors contributing to type 2 diabetes, with application to personalized diagnoses and treatments. We look forward to future developments in this regard.
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Affiliation(s)
- Yoshiaki Kido
- 1Division of Metabolism and Disease, Department of Biophysics, Kobe University Graduate School of Health Sciences, Kobe, Japan.,2Division of Diabetes and Endocrinology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
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Excess Folic Acid Increases Lipid Storage, Weight Gain, and Adipose Tissue Inflammation in High Fat Diet-Fed Rats. Nutrients 2016; 8:nu8100594. [PMID: 27669293 PMCID: PMC5083982 DOI: 10.3390/nu8100594] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 09/12/2016] [Accepted: 09/13/2016] [Indexed: 01/21/2023] Open
Abstract
Folic acid intake has increased to high levels in many countries, raising concerns about possible adverse effects, including disturbances to energy and lipid metabolism. Our aim was to investigate the effects of excess folic acid (EFA) intake compared to adequate folic acid (AFA) intake on metabolic health in a rodent model. We conducted these investigations in the setting of either a 15% energy low fat (LF) diet or 60% energy high fat (HF) diet. There was no difference in weight gain, fat mass, or glucose tolerance in EFA-fed rats compared to AFA-fed rats when they were fed a LF diet. However, rats fed EFA in combination with a HF diet had significantly greater weight gain and fat mass compared to rats fed AFA (p < 0.05). Gene expression analysis showed increased mRNA levels of peroxisome proliferator-activated receptor γ (PPARγ) and some of its target genes in adipose tissue of high fat-excess folic acid (HF-EFA) fed rats. Inflammation was increased in HF-EFA fed rats, associated with impaired glucose tolerance compared to high fat-adequate folic acid (HF-AFA) fed rats (p < 0.05). In addition, folic acid induced PPARγ expression and triglyceride accumulation in 3T3-L1 cells. Our results suggest that excess folic acid may exacerbate weight gain, fat accumulation, and inflammation caused by consumption of a HF diet.
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Wang H, Shi H, Luo J, Yi Y, Yao D, Zhang X, Ma G, Loor JJ. MiR-145 Regulates Lipogenesis in Goat Mammary Cells Via Targeting INSIG1 and Epigenetic Regulation of Lipid-Related Genes. J Cell Physiol 2016; 232:1030-1040. [PMID: 27448180 DOI: 10.1002/jcp.25499] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Accepted: 07/21/2016] [Indexed: 01/17/2023]
Abstract
MicroRNAs (miRNAs) are noncoding RNA molecules that regulate gene expression at the post-transcriptional level to cause translational repression or degradation of targets. The profiles of miRNAs across stages of lactation in small ruminant species such as dairy goats is unknown. A small RNA library was constructed using tissue samples from mammary gland of Saanen dairy goats harvested at mid-lactation followed by sequencing via Solexa technology. A total of 796 conserved miRNAs, 263 new miRNAs, and 821 pre-miRNAs were uncovered. After comparative analyses of our sequence data with published mammary gland transcriptome data across different stages of lactation, a total of 37 miRNAs (including miR-145) had significant differences in expression over the lactation cycle. Further studies revealed that miR-145 regulates metabolism of fatty acids in goat mammary gland epithelial cells (GMEC). Compared with nonlactating mammary tissue, lactating mammary gland had a marked increase in expression of miR-145. Overexpression of miR-145 increased transcription of genes associated with milk fat synthesis resulting in greater fat droplet formation, triacylglycerol accumulation, and proportion of unsaturated fatty acids. In contrast, silencing of miR-145 impaired fatty acid synthesis. Inhibition of miR-145 increased methylation levels of fatty acid synthase (FASN), stearoyl-CoA desaturase 1 (SCD1), peroxisome proliferator-activated receptor gamma (PPARG), and sterol regulatory element binding transcription factor 1 (SREBF1). Luciferase reporter assays confirmed that insulin induced gene 1 (INSIG1) is a direct target of miR-145. These findings underscore the need for further studies to evaluate the potential for targeting miR-145 for improving beneficial milk components in ruminant milk. J. Cell. Physiol. 232: 1030-1040, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Hui Wang
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P.R. China
| | - Huaiping Shi
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P.R. China
| | - Jun Luo
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P.R. China
| | - Yongqing Yi
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P.R. China
| | - Dawei Yao
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P.R. China
| | - Xueying Zhang
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P.R. China
| | - Gongzhen Ma
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P.R. China
| | - Juan J Loor
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana, Illinois
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Gonzalez-Baro MR, Coleman RA. Mitochondrial acyltransferases and glycerophospholipid metabolism. Biochim Biophys Acta Mol Cell Biol Lipids 2016; 1862:49-55. [PMID: 27377347 DOI: 10.1016/j.bbalip.2016.06.023] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 06/23/2016] [Accepted: 06/28/2016] [Indexed: 12/14/2022]
Abstract
Our understanding of the synthesis and remodeling of mitochondrial phospholipids remains incomplete. Two isoforms of glycerol-3-phosphate acyltransferase (GPAT1 and 2) and two isoforms of acylglycerol-3-phosphate acyltransferase (AGPAT4 and 5) are located on the outer mitochondrial membrane, suggesting that both lysophosphatidic acid and phosphatidic acid are synthesized in situ for de novo glycerolipid biosynthesis. However, it is believed that the phosphatidic acid substrate for cardiolipin and phosphatidylethanolamine biosynthesis is produced at the endoplasmic reticulum whereas the phosphatidic acid synthesized in the mitochondria must be transferred to the endoplasmic reticulum before it undergoes additional steps to form the mature phospholipids that are trafficked back to the mitochondria. It is unclear whether mitochondrial phospholipids are remodeled by mitochondrial acyltransferases or whether lysophospholipids must return to the endoplasmic reticulum or to the mitochondrial associated membrane for reesterification. In this review we will focus on the few glycerolipid acyltransferases that are known to be mitochondrial. This article is part of a Special Issue entitled: Lipids of Mitochondria edited by Guenther Daum.
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Affiliation(s)
- Maria R Gonzalez-Baro
- Instituto de Investigaciones Bioquımicas de La Plata, CONICET, Facultad de Ciencias Medicas, Universidad Nacional de La Plata, La Plata 1900, Argentina
| | - Rosalind A Coleman
- Department of Nutrition, University of North Carolina, Chapel Hill, NC 27599, USA.
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28
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Vansant G. Effect of Maternal and Paternal Nutrition on DNA Methylation in the Offspring: A Systematic Review of Human and Animal Studies. ACTA ACUST UNITED AC 2016. [DOI: 10.15406/aowmc.2016.04.00093] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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29
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Sabet JA, Park LK, Iyer LK, Tai AK, Koh GY, Pfalzer AC, Parnell LD, Mason JB, Liu Z, Byun AJ, Crott JW. Paternal B Vitamin Intake Is a Determinant of Growth, Hepatic Lipid Metabolism and Intestinal Tumor Volume in Female Apc1638N Mouse Offspring. PLoS One 2016; 11:e0151579. [PMID: 26968002 PMCID: PMC4788446 DOI: 10.1371/journal.pone.0151579] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 03/01/2016] [Indexed: 11/26/2022] Open
Abstract
Background The importance of maternal nutrition to offspring health and risk of disease is well established. Emerging evidence suggests paternal diet may affect offspring health as well. Objective In the current study we sought to determine whether modulating pre-conception paternal B vitamin intake alters intestinal tumor formation in offspring. Additionally, we sought to identify potential mechanisms for the observed weight differential among offspring by profiling hepatic gene expression and lipid content. Methods Male Apc1638N mice (prone to intestinal tumor formation) were fed diets containing replete (control, CTRL), mildly deficient (DEF), or supplemental (SUPP) quantities of vitamins B2, B6, B12, and folate for 8 weeks before mating with control-fed wild type females. Wild type offspring were euthanized at weaning and hepatic gene expression profiled. Apc1638N offspring were fed a replete diet and euthanized at 28 weeks of age to assess tumor burden. Results No differences in intestinal tumor incidence or burden were found between male Apc1638N offspring of different paternal diet groups. Although in female Apc1638N offspring there were no differences in tumor incidence or multiplicity, a stepwise increase in tumor volume with increasing paternal B vitamin intake was observed. Interestingly, female offspring of SUPP and DEF fathers had a significantly lower body weight than those of CTRL fed fathers. Moreover, hepatic trigylcerides and cholesterol were elevated 3-fold in adult female offspring of SUPP fathers. Weanling offspring of the same fathers displayed altered expression of several key lipid-metabolism genes. Hundreds of differentially methylated regions were identified in the paternal sperm in response to DEF and SUPP diets. Aside from a few genes including Igf2, there was a striking lack of overlap between these genes differentially methylated in sperm and differentially expressed in offspring. Conclusions In this animal model, modulation of paternal B vitamin intake prior to mating alters offspring weight gain, lipid metabolism and tumor growth in a sex-specific fashion. These results highlight the need to better define how paternal nutrition affects the health of offspring.
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Affiliation(s)
- Julia A. Sabet
- Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, Massachusetts, United States of America
- Friedman School of Nutrition Science and Policy at Tufts University, Boston, Massachusetts, United States of America
| | - Lara K. Park
- Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, Massachusetts, United States of America
- Friedman School of Nutrition Science and Policy at Tufts University, Boston, Massachusetts, United States of America
| | - Lakshmanan K. Iyer
- Tufts Center for Neuroscience Research, Neuroscience Department, Tufts University School of Medicine, Boston, Massachusetts, United States of America
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, Massachusetts, United States of America
| | - Albert K. Tai
- Tufts University Core Facility, Tufts University School of Medicine, Boston, Massachusetts, United States of America
| | - Gar Yee Koh
- Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, Massachusetts, United States of America
| | - Anna C. Pfalzer
- Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, Massachusetts, United States of America
- Friedman School of Nutrition Science and Policy at Tufts University, Boston, Massachusetts, United States of America
| | - Laurence D. Parnell
- Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, Massachusetts, United States of America
| | - Joel B. Mason
- Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, Massachusetts, United States of America
- Friedman School of Nutrition Science and Policy at Tufts University, Boston, Massachusetts, United States of America
| | - Zhenhua Liu
- Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, Massachusetts, United States of America
- School of Public Health and Health Sciences, UMass Amherst, Amherst, Massachusetts, United States of America
| | - Alexander J. Byun
- Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, Massachusetts, United States of America
| | - Jimmy W. Crott
- Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, Massachusetts, United States of America
- Friedman School of Nutrition Science and Policy at Tufts University, Boston, Massachusetts, United States of America
- * E-mail:
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Ogawa Y, Hashimoto K. [The 43rd Scientific Meeting: Perspectives of Internal Medicine; Genetic predisposition and related life-style underlying metabolic disorders; 2. Genetic and Environmental Susceptibility : 2) Genome and epigenome in obesity]. ACTA ACUST UNITED AC 2016; 105:376-82. [PMID: 27319178 DOI: 10.2169/naika.105.376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Maternal high-fat feeding in pregnancy programs atherosclerotic lesion size in the ApoE*3 Leiden mouse. J Dev Orig Health Dis 2016; 7:290-297. [PMID: 26829884 DOI: 10.1017/s2040174416000027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Periods of rapid growth seen during the early stages of fetal development, including cell proliferation and differentiation, are greatly influenced by the maternal environment. We demonstrate here that over-nutrition, specifically exposure to a high-fat diet in utero, programed the extent of atherosclerosis in the offspring of ApoE*3 Leiden transgenic mice. Pregnant ApoE*3 Leiden mice were fed either a control chow diet (2.8% fat, n=12) or a high-fat, moderate-cholesterol diet (MHF, 19.4% fat, n=12). Dams were fed the chow diet during the suckling period. At 28 days postnatal age wild type and ApoE*3 Leiden offspring from chow or MHF-fed mothers were fed either a control chow diet (n=37) or a diet rich in cocoa butter (15%) and cholesterol (0.25%), for 14 weeks to induce atherosclerosis (n=36). Offspring from MHF-fed mothers had 1.9-fold larger atherosclerotic lesions (P<0.001). There was no direct effect of prenatal diet on plasma triglycerides or cholesterol; however, transgenic ApoE*3 Leiden offspring displayed raised cholesterol when on an atherogenic diet compared with wild-type controls (P=0.031). Lesion size was correlated with plasma lipid parameters after adjustment for genotype, maternal diet and postnatal diet (R 2=0.563, P<0.001). ApoE*3 Leiden mothers fed a MHF diet developed hypercholesterolemia (plasma cholesterol two-fold higher than in chow-fed mothers, P=0.011). The data strongly suggest that maternal hypercholesterolemia programs later susceptibility to atherosclerosis. This is consistent with previous observations in humans and animal models.
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Bian Y, Lei Y, Wang C, Wang J, Wang L, Liu L, Liu L, Gao X, Li Q. Epigenetic Regulation of miR-29s Affects the Lactation Activity of Dairy Cow Mammary Epithelial Cells. J Cell Physiol 2015; 230:2152-63. [DOI: 10.1002/jcp.24944] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Accepted: 01/23/2015] [Indexed: 01/17/2023]
Affiliation(s)
- Yanjie Bian
- Research Department of Lactation Biology and Regulation of Mammary Gland Function; Northeast Agricultural University; Harbin 150030 China
| | - Yu Lei
- Research Department of Lactation Biology and Regulation of Mammary Gland Function; Northeast Agricultural University; Harbin 150030 China
| | - Chunmei Wang
- Key Laboratory of Dairy Science of Ministry of Education; Northeast Agricultural University; Harbin 150030 China
| | - Jie Wang
- Key Laboratory of Dairy Science of Ministry of Education; Northeast Agricultural University; Harbin 150030 China
| | - Lina Wang
- Research Department of Lactation Biology and Regulation of Mammary Gland Function; Northeast Agricultural University; Harbin 150030 China
| | - Lili Liu
- Key Laboratory of Dairy Science of Ministry of Education; Northeast Agricultural University; Harbin 150030 China
| | - Lixin Liu
- Key Laboratory of Dairy Science of Ministry of Education; Northeast Agricultural University; Harbin 150030 China
| | - Xuejun Gao
- Key Laboratory of Dairy Science of Ministry of Education; Northeast Agricultural University; Harbin 150030 China
| | - Qingzhang Li
- Research Department of Lactation Biology and Regulation of Mammary Gland Function; Northeast Agricultural University; Harbin 150030 China
- Key Laboratory of Dairy Science of Ministry of Education; Northeast Agricultural University; Harbin 150030 China
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Hashimoto K, Ogawa Y. [The Update of Obesity Syndrome: Molecular Mechanism, Pathophysiology and Therapies. Topics: I. Recent Topics on Diagnosis and Pathophysiology of the Obesity Syndrome; 2. Progress in genomic and epigenetic medicine against obesity]. ACTA ACUST UNITED AC 2015; 104:697-702. [PMID: 26536731 DOI: 10.2169/naika.104.697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Ehara T, Kamei Y, Yuan X, Takahashi M, Kanai S, Tamura E, Tsujimoto K, Tamiya T, Nakagawa Y, Shimano H, Takai-Igarashi T, Hatada I, Suganami T, Hashimoto K, Ogawa Y. Ligand-activated PPARα-dependent DNA demethylation regulates the fatty acid β-oxidation genes in the postnatal liver. Diabetes 2015; 64:775-84. [PMID: 25311726 DOI: 10.2337/db14-0158] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The metabolic function of the liver changes sequentially during early life in mammals to adapt to the marked changes in nutritional environment. Accordingly, hepatic fatty acid β-oxidation is activated after birth to produce energy from breast milk lipids. However, how it is induced during the neonatal period is poorly understood. Here we show DNA demethylation and increased mRNA expression of the fatty acid β-oxidation genes in the postnatal mouse liver. The DNA demethylation does not occur in the fetal mouse liver under the physiologic condition, suggesting that it is specific to the neonatal period. Analysis of mice deficient in the nuclear receptor peroxisome proliferator-activated receptor α (PPARα) and maternal administration of a PPARα ligand during the gestation and lactation periods reveal that the DNA demethylation is PPARα dependent. We also find that DNA methylation of the fatty acid β-oxidation genes are reduced in the adult human liver relative to the fetal liver. This study represents the first demonstration that the ligand-activated PPARα-dependent DNA demethylation regulates the hepatic fatty acid β-oxidation genes during the neonatal period, thereby highlighting the role of a lipid-sensing nuclear receptor in the gene- and life-stage-specific DNA demethylation of a particular metabolic pathway.
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Affiliation(s)
- Tatsuya Ehara
- Department of Molecular Endocrinology and Metabolism, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan Nutrition Research Department, Nutritional Science Institute, Morinaga Milk Industry Co. Ltd., Zama, Kanagawa, Japan
| | - Yasutomi Kamei
- Department of Organ Network and Metabolism, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Xunmei Yuan
- Department of Organ Network and Metabolism, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Mayumi Takahashi
- Department of Organ Network and Metabolism, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Sayaka Kanai
- Department of Organ Network and Metabolism, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Erina Tamura
- Department of Molecular Endocrinology and Metabolism, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Kazutaka Tsujimoto
- Department of Molecular Endocrinology and Metabolism, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Takashi Tamiya
- Department of Molecular Endocrinology and Metabolism, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Yoshimi Nakagawa
- Department of Internal Medicine (Metabolism and Endocrinology), Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Hitoshi Shimano
- Department of Internal Medicine (Metabolism and Endocrinology), Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan International Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Takako Takai-Igarashi
- Department of Health Record Informatics, Tohoku Medical Megabank Organization, Aoba-ku, Sendai, Miyagi, Japan
| | - Izuho Hatada
- Genome Science, Institute for Molecular and Cellular Regulation, Gunma University, Maebashi, Gunma, Japan
| | - Takayoshi Suganami
- Department of Organ Network and Metabolism, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan Japan Science and Technology Agency, PRESTO, Goban-cho Chiyoda-ku, Tokyo, Japan
| | - Koshi Hashimoto
- Department of Preemptive Medicine and Metabolism, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Yoshihiro Ogawa
- Department of Molecular Endocrinology and Metabolism, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
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Gotoh T. Potential of the application of epigenetics in animal production. ANIMAL PRODUCTION SCIENCE 2015. [DOI: 10.1071/an14467] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Our many current environmental challenges, including worldwide abnormal weather, global warming, and pollution, necessitate a new and innovative strategy for animal production for the next generation. This strategy should incorporate not only higher-efficiency production, but also advanced biological concepts and multi-functional agricultural techniques, into environmentally friendly systems. Recent research has discovered a unique phenomenon referred to as ‘foetal and neonatal programming’, which is based on ‘the developmental origins of health and disease (DOHaD)’ concept. These studies have shown that alterations in foetal and early postnatal nutrition and endocrine status may result in developmental adaptations that permanently change the structure, physiology and metabolism of affected animals during adult life. Ruminants fill an important ecological niche that capitalises on the symbiotic relationship between fibre-fermenting ruminal microbes and the mammalian demand for usable nutrients. The timing of the perturbation in maternal nutrient availability plays an important role in determining the effect that the foetal and neonatal programming will have on the developing placenta or foetus and offspring performance. Developmental programming through nutritional manipulations may help the ruminant, as an effective grass–protein converter, fulfil its production potential.
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Podrini C, Koffas A, Chokshi S, Vinciguerra M, Lelliott CJ, White JK, Adissu HA, Williams R, Greco A. MacroH2A1 isoforms are associated with epigenetic markers for activation of lipogenic genes in fat-induced steatosis. FASEB J 2014; 29:1676-87. [PMID: 25526730 DOI: 10.1096/fj.14-262717] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Accepted: 11/24/2014] [Indexed: 01/14/2023]
Abstract
The importance of epigenetic changes in the development of hepatic steatosis is largely unknown. The histone variant macroH2A1 under alternative splicing gives rise to macroH2A1.1 and macroH2A1.2. In this study, we show that the macroH2A1 isoforms play an important role in the regulation of lipid accumulation in hepatocytes. Hepatoma cell line and immortalized human hepatocytes transiently transfected or knocked down with macroH2A1 isoforms were used as in vitro model of fat-induced steatosis. Gene expressions were analyzed by quantitative PCR array and Western blot. Chromatin immunoprecipitation analysis was performed to check the association of histone H3 lysine 27 trimethylation (H3K27me3) and histone H3 lysine 4 trimethylation (H3K4me3) with the promoter of lipogenic genes. Livers from knockout mice that are resistant to lipid deposition despite a high-fat diet were used for histopathology. We found that macroH2A1.2 is regulated by fat uptake and that its overexpression caused an increase in lipid uptake, triglycerides, and lipogenic genes compared with macroH2A1.1. This suggests that macroH2A1.2 is important for lipid uptake, whereas macroH2A1.1 was found to be protective. The result was supported by a high positivity for macroH2A1.1 in knockout mice for genes targeted by macroH2A1 (Atp5a1 and Fam73b), that under a high-fat diet presented minimal lipidosis. Moreover, macroH2A1 isoforms differentially regulate the expression of lipogenic genes by modulating the association of the active (H3K4me3) and repressive (H3K27me3) histone marks on their promoters. This study underlines the importance of the replacement of noncanonical histones in the regulation of genes involved in lipid metabolism in the progression of steatosis.
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Affiliation(s)
- Christine Podrini
- *Foundation for Liver Research, Institute of Hepatology, London, United Kingdom; University College London (UCL)--Institute for Liver & Digestive Health, UCL Medical School, London, United Kingdom, Mouse Genetics Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Cambridge, United Kingdom; and Physiology and Experimental Medicine Research Program, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Apostolos Koffas
- *Foundation for Liver Research, Institute of Hepatology, London, United Kingdom; University College London (UCL)--Institute for Liver & Digestive Health, UCL Medical School, London, United Kingdom, Mouse Genetics Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Cambridge, United Kingdom; and Physiology and Experimental Medicine Research Program, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Shilpa Chokshi
- *Foundation for Liver Research, Institute of Hepatology, London, United Kingdom; University College London (UCL)--Institute for Liver & Digestive Health, UCL Medical School, London, United Kingdom, Mouse Genetics Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Cambridge, United Kingdom; and Physiology and Experimental Medicine Research Program, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Manlio Vinciguerra
- *Foundation for Liver Research, Institute of Hepatology, London, United Kingdom; University College London (UCL)--Institute for Liver & Digestive Health, UCL Medical School, London, United Kingdom, Mouse Genetics Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Cambridge, United Kingdom; and Physiology and Experimental Medicine Research Program, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Christopher J Lelliott
- *Foundation for Liver Research, Institute of Hepatology, London, United Kingdom; University College London (UCL)--Institute for Liver & Digestive Health, UCL Medical School, London, United Kingdom, Mouse Genetics Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Cambridge, United Kingdom; and Physiology and Experimental Medicine Research Program, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Jacqueline K White
- *Foundation for Liver Research, Institute of Hepatology, London, United Kingdom; University College London (UCL)--Institute for Liver & Digestive Health, UCL Medical School, London, United Kingdom, Mouse Genetics Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Cambridge, United Kingdom; and Physiology and Experimental Medicine Research Program, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Hibret A Adissu
- *Foundation for Liver Research, Institute of Hepatology, London, United Kingdom; University College London (UCL)--Institute for Liver & Digestive Health, UCL Medical School, London, United Kingdom, Mouse Genetics Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Cambridge, United Kingdom; and Physiology and Experimental Medicine Research Program, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Roger Williams
- *Foundation for Liver Research, Institute of Hepatology, London, United Kingdom; University College London (UCL)--Institute for Liver & Digestive Health, UCL Medical School, London, United Kingdom, Mouse Genetics Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Cambridge, United Kingdom; and Physiology and Experimental Medicine Research Program, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Azzura Greco
- *Foundation for Liver Research, Institute of Hepatology, London, United Kingdom; University College London (UCL)--Institute for Liver & Digestive Health, UCL Medical School, London, United Kingdom, Mouse Genetics Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Cambridge, United Kingdom; and Physiology and Experimental Medicine Research Program, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
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37
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Hanson MA, Gluckman PD. Early developmental conditioning of later health and disease: physiology or pathophysiology? Physiol Rev 2014; 94:1027-76. [PMID: 25287859 PMCID: PMC4187033 DOI: 10.1152/physrev.00029.2013] [Citation(s) in RCA: 698] [Impact Index Per Article: 69.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Extensive experimental animal studies and epidemiological observations have shown that environmental influences during early development affect the risk of later pathophysiological processes associated with chronic, especially noncommunicable, disease (NCD). This field is recognized as the developmental origins of health and disease (DOHaD). We discuss the extent to which DOHaD represents the result of the physiological processes of developmental plasticity, which may have potential adverse consequences in terms of NCD risk later, or whether it is the manifestation of pathophysiological processes acting in early life but only becoming apparent as disease later. We argue that the evidence suggests the former, through the operation of conditioning processes induced across the normal range of developmental environments, and we summarize current knowledge of the physiological processes involved. The adaptive pathway to later risk accords with current concepts in evolutionary developmental biology, especially those concerning parental effects. Outside the normal range, effects on development can result in nonadaptive processes, and we review their underlying mechanisms and consequences. New concepts concerning the underlying epigenetic and other mechanisms involved in both disruptive and nondisruptive pathways to disease are reviewed, including the evidence for transgenerational passage of risk from both maternal and paternal lines. These concepts have wider implications for understanding the causes and possible prevention of NCDs such as type 2 diabetes and cardiovascular disease, for broader social policy and for the increasing attention paid in public health to the lifecourse approach to NCD prevention.
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Affiliation(s)
- M A Hanson
- Academic Unit of Human Development and Health, University of Southampton, and NIHR Nutrition Biomedical Research Centre, University Hospital, Southampton, United Kingdom; and Liggins Institute and Gravida (National Centre for Growth and Development), University of Auckland, Auckland, New Zealand
| | - P D Gluckman
- Academic Unit of Human Development and Health, University of Southampton, and NIHR Nutrition Biomedical Research Centre, University Hospital, Southampton, United Kingdom; and Liggins Institute and Gravida (National Centre for Growth and Development), University of Auckland, Auckland, New Zealand
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38
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Poirier S, Samami S, Mamarbachi M, Demers A, Chang TY, Vance DE, Hatch GM, Mayer G. The epigenetic drug 5-azacytidine interferes with cholesterol and lipid metabolism. J Biol Chem 2014; 289:18736-51. [PMID: 24855646 DOI: 10.1074/jbc.m114.563650] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
DNA methylation and histone acetylation inhibitors are widely used to study the role of epigenetic marks in the regulation of gene expression. In addition, several of these molecules are being tested in clinical trials or already in use in the clinic. Antimetabolites, such as the DNA-hypomethylating agent 5-azacytidine (5-AzaC), have been shown to lower malignant progression to acute myeloid leukemia and to prolong survival in patients with myelodysplastic syndromes. Here we examined the effects of DNA methylation inhibitors on the expression of lipid biosynthetic and uptake genes. Our data demonstrate that, independently of DNA methylation, 5-AzaC selectively and very potently reduces expression of key genes involved in cholesterol and lipid metabolism (e.g. PCSK9, HMGCR, and FASN) in all tested cell lines and in vivo in mouse liver. Treatment with 5-AzaC disturbed subcellular cholesterol homeostasis, thereby impeding activation of sterol regulatory element-binding proteins (key regulators of lipid metabolism). Through inhibition of UMP synthase, 5-AzaC also strongly induced expression of 1-acylglycerol-3-phosphate O-acyltransferase 9 (AGPAT9) and promoted triacylglycerol synthesis and cytosolic lipid droplet formation. Remarkably, complete reversal was obtained by the co-addition of either UMP or cytidine. Therefore, this study provides the first evidence that inhibition of the de novo pyrimidine synthesis by 5-AzaC disturbs cholesterol and lipid homeostasis, probably through the glycerolipid biosynthesis pathway, which may contribute mechanistically to its beneficial cytostatic properties.
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Affiliation(s)
- Steve Poirier
- From the Laboratory of Molecular Cell Biology, Montreal Heart Institute, Montréal, Québec H1T 1C8, Canada, the Département de Pharmacologie, Faculté de Médecine, Université de Montréal, Montréal, Québec H3C 3J7, Canada
| | - Samaneh Samami
- From the Laboratory of Molecular Cell Biology, Montreal Heart Institute, Montréal, Québec H1T 1C8, Canada, the Département de Pharmacologie, Faculté de Médecine, Université de Montréal, Montréal, Québec H3C 3J7, Canada
| | - Maya Mamarbachi
- From the Laboratory of Molecular Cell Biology, Montreal Heart Institute, Montréal, Québec H1T 1C8, Canada
| | - Annie Demers
- From the Laboratory of Molecular Cell Biology, Montreal Heart Institute, Montréal, Québec H1T 1C8, Canada
| | - Ta Yuan Chang
- the Department of Biochemistry, Dartmouth Medical School, Hanover, New Hampshire 03755-1404
| | - Dennis E Vance
- the Department of Biochemistry and Group on the Molecular and Cell Biology of Lipids, University of Alberta, Edmonton, Alberta T6G 2S2, Canada
| | - Grant M Hatch
- the DREAM Theme, Manitoba Institute of Child Health, Departments of Pharmacology and Therapeutics and Biochemistry and Medical Genetics, University of Manitoba, Winnipeg, Manitoba R3E 0T6, Canada, and
| | - Gaétan Mayer
- From the Laboratory of Molecular Cell Biology, Montreal Heart Institute, Montréal, Québec H1T 1C8, Canada, the Département de Pharmacologie, Faculté de Médecine, Université de Montréal, Montréal, Québec H3C 3J7, Canada, the Département de Médecine, Faculté de Médecine, Université de Montréal, Montréal, Québec H3C 3J7, Canada
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39
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Yokomizo H, Inoguchi T, Sonoda N, Sakaki Y, Maeda Y, Inoue T, Hirata E, Takei R, Ikeda N, Fujii M, Fukuda K, Sasaki H, Takayanagi R. Maternal high-fat diet induces insulin resistance and deterioration of pancreatic β-cell function in adult offspring with sex differences in mice. Am J Physiol Endocrinol Metab 2014; 306:E1163-75. [PMID: 24691028 DOI: 10.1152/ajpendo.00688.2013] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Intrauterine environment may influence the health of postnatal offspring. There have been many studies on the effects of maternal high-fat diet (HFD) on diabetes and glucose metabolism in offspring. Here, we investigated the effects in male and female offspring. C57/BL6J mice were bred and fed either control diet (CD) or HFD from conception to weaning, and offspring were fed CD or HFD from 6 to 20 wk. At 20 wk, maternal HFD induced glucose intolerance and insulin resistance in offspring. Additionally, liver triacylglycerol content, adipose tissue mass, and inflammation increased in maternal HFD. In contrast, extending previous observations, insulin secretion at glucose tolerance test, islet area, insulin content, and PDX-1 mRNA levels in isolated islets were lower in maternal HFD in males, whereas they were higher in females. Oxidative stress in islets increased in maternal HFD in males, whereas there were no differences in females. Plasma estradiol levels were lower in males than in females and decreased in offspring fed HFD and also decreased by maternal HFD, suggesting that females may be protected from insulin deficiency by inhibiting oxidative stress. In conclusion, maternal HFD induced insulin resistance and deterioration of pancreatic β-cell function, with marked sex differences in adult offspring accompanied by adipose tissue inflammation and liver steatosis. Additionally, our results demonstrate that potential mechanisms underlying sex differences in pancreatic β-cell function may be related partially to increases in oxidative stress in male islets and decreased plasma estradiol levels in males.
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Affiliation(s)
- Hisashi Yokomizo
- Department of Internal Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Toyoshi Inoguchi
- Department of Internal Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan; Innovation Center for Medical Redox Navigation, Kyushu University, Fukuoka, Japan; and
| | - Noriyuki Sonoda
- Department of Internal Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan; Innovation Center for Medical Redox Navigation, Kyushu University, Fukuoka, Japan; and
| | - Yuka Sakaki
- Department of Internal Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yasutaka Maeda
- Department of Internal Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Tomoaki Inoue
- Department of Internal Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Eiichi Hirata
- Department of Internal Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Ryoko Takei
- Department of Internal Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Noriko Ikeda
- Department of Internal Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masakazu Fujii
- Department of Internal Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Kei Fukuda
- Division of Epigenomics, Department of Molecular Genetics, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
| | - Hiroyuki Sasaki
- Division of Epigenomics, Department of Molecular Genetics, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
| | - Ryoichi Takayanagi
- Department of Internal Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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40
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Hino S, Nagaoka K, Nakao M. Metabolism–epigenome crosstalk in physiology and diseases. J Hum Genet 2013; 58:410-5. [PMID: 23719186 DOI: 10.1038/jhg.2013.57] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Revised: 04/27/2013] [Accepted: 05/02/2013] [Indexed: 02/01/2023]
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41
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Takahashi M, Kamei Y, Ehara T, Yuan X, Suganami T, Takai-Igarashi T, Hatada I, Ogawa Y. Analysis of DNA methylation change induced by Dnmt3b in mouse hepatocytes. Biochem Biophys Res Commun 2013; 434:873-8. [PMID: 23611774 DOI: 10.1016/j.bbrc.2013.04.041] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2013] [Accepted: 04/07/2013] [Indexed: 01/25/2023]
Abstract
DNA methylation is a key epigenetic contributor to gene regulation in mammals. We have recently found that in the mouse liver, the promoter region of glycerol-3-phosphate acyltransferase 1, a rate-limiting enzyme of de novo lipogenesis, is regulated by DNA methylation, which is mediated by Dnmt3b, an enzyme required for the initiation of de novo methylation. In this study, using primary cultures of mouse hepatocytes with adenoviral overexpression of Dnmt3b, we characterized Dnmt3b-dependent DNA methylation on a genome-wide basis. A genome-wide DNA methylation analysis, called microarray-based integrated analysis of methylation by isoschizomers, identified 108 genes with Dnmt3b dependent DNA methylation. In DNA expression array analysis, expression of some genes with Dnmt3b-dependent DNA methylation was suppressed. Studies with primary mouse hepatocytes overexpressing Dnmt3b or Dnmt3a revealed that many genes with Dnmt3b-dependent methylation are not methylated by Dnmt3a, whereas those methylated by Dnmt3a are mostly methylated by Dnmt3b. Bioinformatic analysis showed that the CANAGCTG and CCGGWNCSC (N denotes A, T, G, or C; W denotes A or T; and S denotes C or G) sequences are enriched in genes methylated by overexpression of Dnmt3b and Dnmt3a, respectively. We also observed a large number of genes with Dnmt3b-dependent DNA methylation in primary cultures of mouse hepatocytes with adenoviral overexpression of Dnmt3, suggesting that Dnmt3b is an important DNA methyltransferase in primary mouse hepatocytes, targets specific genes, and potentially plays a role in vivo.
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Affiliation(s)
- Mayumi Takahashi
- Department of Organ Network and Metabolism, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Tokyo 136-8510, Japan.
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Glucose-independent persistence of PAI-1 gene expression and H3K4 tri-methylation in type 1 diabetic mouse endothelium: implication in metabolic memory. Biochem Biophys Res Commun 2013; 433:66-72. [PMID: 23454124 DOI: 10.1016/j.bbrc.2013.02.064] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2013] [Accepted: 02/16/2013] [Indexed: 12/25/2022]
Abstract
Clinical trials with type 1 and type 2 diabetes have identified a phenomenon known as "metabolic memory" in which previous periods of hyperglycemia result in the long-lasting deleterious impact on cardiovascular events. Emerging evidence shows that transient hyperglycemic exposure of human endothelial cells induces histone 3 lysine 4 mono-methylation (H3K4me1) on the promoter and persistent mRNA expression of RelA and IL-8 genes, suggesting that epigenetic histone modification and chromatin structure remodeling is a key event underlying metabolic memory. This burgeoning hypothesis, however, critically remains to be tested for relevance in the disease process of diabetes in vivo, and for broader applicability to an array of genes involved in endothelial dysfunction. To address this, we used type 1 diabetes mouse model induced by streptozocin to be hyperglycemic for 8 weeks, and isolated endothelial cells that were used either freshly after isolation or after 2 to 3-week cell culture in normoglycemic conditions. mRNA expression profiling in diabetic mouse endothelial cells revealed significant and persistent up-regulation of Serpine1 encoding PAI-1, the hypo-fibrinolytic mediator leading to thrombotic diseases in diabetes, along with Rock2, Fn1 and Ccl2, whereas only Serpine 1 was persistently elevated in high glucose-treated mouse endothelial cells. Chromosome immunoprecipitation assay in type 1 diabetic mouse endothelial cells showed predominant enrichment of H3K4 tri-methylation on Serpine1 promoter, suggesting a unique epigenetic regulation in diabetic mice as opposed to high glucose-treated human ECs. Our study demonstrates the importance of combining in vivo models of diabetes with high glucose-treated cell culture to better assess the epigenetic mechanisms relevant to disease.
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43
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Maekawa F, Shimba S, Takumi S, Sano T, Suzuki T, Bao J, Ohwada M, Ehara T, Ogawa Y, Nohara K. Diurnal expression of Dnmt3b mRNA in mouse liver is regulated by feeding and hepatic clockwork. Epigenetics 2012; 7:1046-56. [PMID: 22847467 PMCID: PMC3515014 DOI: 10.4161/epi.21539] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
DNA methyltransferase 3B (DNMT3B) is critically involved in de novo DNA methylation and genomic stability, while the regulatory mechanism in liver is largely unknown. We previously reported that diurnal variation occurs in the mRNA expression of Dnmt3b in adult mouse liver. The aim of this study was to determine the mechanism underlying the diurnal expression pattern. The highest level and the lowest level of Dnmt3b mRNA expression were confirmed to occur at dawn and in the afternoon, respectively, and the expression pattern of Dnmt3b closely coincided with that of Bmal1. Since the diurnal pattern of Dnmt3b mRNA expression developed at weaning and scheduled feeding to separate the feeding cycle from the light/dark cycle led to a phase-shift in the expression, it could be assumed that feeding plays a critical role as an entrainment signal. In liver-specific Bmal1 knockout (L-Bmal1 KO) mice, L-Bmal1 deficiency resulted in significantly higher levels of Dnmt3b at all measured time points, and the time when the expression was the lowest in wild-type mice was shifted to earlier. Investigation of global DNA methylation revealed a temporal decrease of 5-methyl-cytosine percentage in the genome of wild-type mice in late afternoon. By contrast, no such decrease in 5-methyl-cytosine percentage was detected in L-Bmal1 KO mice, suggesting that altered Dnmt3b expression affects the DNA methylation state. Taken together, the results suggest that the feeding and hepatic clockwork generated by the clock genes, including Bmal1, regulate the diurnal variation in Dnmt3b mRNA expression and the consequent dynamic changes in global DNA methylation.
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Affiliation(s)
- Fumihiko Maekawa
- Center for Environmental Health Sciences; National Institute for Environmental Studies; Tsukuba, Japan
| | - Shigeki Shimba
- Department of Health Science; School of Pharmacy; Nihon University; Funabashi, Japan
| | - Shota Takumi
- Center for Environmental Health Sciences; National Institute for Environmental Studies; Tsukuba, Japan
| | - Tomoharu Sano
- Center for Environmental Measurement and Analysis; National Institute for Environmental Studies; Tsukuba, Japan
| | - Takehiro Suzuki
- Center for Environmental Health Sciences; National Institute for Environmental Studies; Tsukuba, Japan
| | - Jinhua Bao
- Center for Environmental Health Sciences; National Institute for Environmental Studies; Tsukuba, Japan
- Graduate School of Life and Environmental Sciences; University of Tsukuba; Tsukuba, Japan
| | - Mika Ohwada
- Center for Environmental Health Sciences; National Institute for Environmental Studies; Tsukuba, Japan
| | - Tatsuya Ehara
- Department of Molecular Endocrinology and Metabolism; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; Tokyo, Japan
| | - Yoshihiro Ogawa
- Department of Molecular Endocrinology and Metabolism; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; Tokyo, Japan
| | - Keiko Nohara
- Center for Environmental Health Sciences; National Institute for Environmental Studies; Tsukuba, Japan
- Graduate School of Life and Environmental Sciences; University of Tsukuba; Tsukuba, Japan
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