1
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Ibrahim S, Gaborit B, Lenoir M, Collod-Beroud G, Stefanovic S. Maternal Pre-Existing Diabetes: A Non-Inherited Risk Factor for Congenital Cardiopathies. Int J Mol Sci 2023; 24:16258. [PMID: 38003449 PMCID: PMC10671602 DOI: 10.3390/ijms242216258] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 10/19/2023] [Accepted: 10/20/2023] [Indexed: 11/26/2023] Open
Abstract
Congenital heart defects (CHDs) are the most common form of birth defects in humans. They occur in 9 out of 1000 live births and are defined as structural abnormalities of the heart. Understanding CHDs is difficult due to the heterogeneity of the disease and its multifactorial etiology. Advances in genomic sequencing have made it possible to identify the genetic factors involved in CHDs. However, genetic origins have only been found in a minority of CHD cases, suggesting the contribution of non-inherited (environmental) risk factors to the etiology of CHDs. Maternal pregestational diabetes is associated with a three- to five-fold increased risk of congenital cardiopathies, but the underlying molecular mechanisms are incompletely understood. According to current hypotheses, hyperglycemia is the main teratogenic agent in diabetic pregnancies. It is thought to induce cell damage, directly through genetic and epigenetic dysregulations and/or indirectly through production of reactive oxygen species (ROS). The purpose of this review is to summarize key findings on the molecular mechanisms altered in cardiac development during exposure to hyperglycemic conditions in utero. It also presents the various in vivo and in vitro techniques used to experimentally model pregestational diabetes. Finally, new approaches are suggested to broaden our understanding of the subject and develop new prevention strategies.
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Affiliation(s)
- Stéphanie Ibrahim
- Aix Marseille University, INSERM, INRAE, C2VN, 13005 Marseille, France;
| | - Bénédicte Gaborit
- Department of Endocrinology, Metabolic Diseases and Nutrition, Pôle ENDO, APHM, 13005 Marseille, France
| | - Marien Lenoir
- Department of Congenital Heart Surgery, La Timone Children Hospital, APHM, Aix Marseille University, 13005 Marseille, France
| | | | - Sonia Stefanovic
- Aix Marseille University, INSERM, INRAE, C2VN, 13005 Marseille, France;
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2
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Salbaum JM, Stone KP, Kruger C, Kappen C. Differential responses to maternal diabetes in embryo and visceral yolk sac. Front Cell Dev Biol 2023; 11:1273641. [PMID: 37928898 PMCID: PMC10620973 DOI: 10.3389/fcell.2023.1273641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 10/02/2023] [Indexed: 11/07/2023] Open
Abstract
Introduction: Maternal diabetes during pregnancy is well known to be associated with a higher risk for structural birth defects in the offspring. Recent searches for underlying mechanisms have largely focused on aberrant processes in the embryo itself, although prior research in rodent models implicated dysfunction also of the visceral yolk sac. The objective of our research was to investigate both tissues within the conceptus simultaneously. Methods: We conducted unbiased transcriptome profiling by RNA sequencing on pairs of individual yolk sacs and their cognate embryos, using the non-obese diabetic (NOD) mouse model. The analysis was performed at gestational day 8.5 on morphologically normal specimen to circumvent confounding by defective development. Results: Even with large sample numbers (n = 33 in each group), we observed considerable variability of gene expression, primarily driven by exposure to maternal diabetes, and secondarily by developmental stage of the embryo. Only a moderate number of genes changed expression in the yolk sac, while in the embryo, the exposure distinctly influenced the relationship of gene expression levels to developmental progression, revealing a possible role for altered cell cycle regulation in the response. Also affected in embryos under diabetic conditions were genes involved in cholesterol biosynthesis and NAD metabolism pathways. Discussion: Exposure to maternal diabetes during gastrulation changes transcriptomic profiles in embryos to a substantially greater effect than in the corresponding yolk sacs, indicating that despite yolk sac being of embryonic origin, different mechanisms control transcriptional activity in these tissues. The effects of maternal diabetes on expression of many genes that are correlated with developmental progression (i.e. somite stage) highlight the importance of considering developmental maturity in the interpretation of transcriptomic data. Our analyses identified cholesterol biosynthesis and NAD metabolism as novel pathways not previously implicated in diabetic pregnancies. Both NAD and cholesterol availability affect a wide variety of cellular signaling processes, and can be modulated by diet, implying that prevention of adverse outcomes from diabetic pregnancies may require broad interventions, particularly in the early stages of pregnancy.
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Affiliation(s)
- J. Michael Salbaum
- Department of Regulation of Gene Expression, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, United States
| | - Kirsten P. Stone
- Department of Developmental Biology, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, United States
| | - Claudia Kruger
- Department of Developmental Biology, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, United States
| | - Claudia Kappen
- Department of Developmental Biology, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, United States
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3
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Martin TM, Burke SJ, Batdorf HM, Burk DH, Ghosh S, Dupuy SD, Karlstad MD, Collier JJ. ICAM-1 Abundance Is Increased in Pancreatic Islets of Hyperglycemic Female NOD Mice and Is Rapidly Upregulated by NF-κB in Pancreatic β-Cells. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2022; 209:569-581. [PMID: 35851539 PMCID: PMC9845432 DOI: 10.4049/jimmunol.2200065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 05/24/2022] [Indexed: 01/04/2023]
Abstract
Type 1 diabetes (T1D) is classified as an autoimmune disease where pancreatic β-cells are specifically targeted by cells of the immune system. The molecular mechanisms underlying this process are not completely understood. Herein, we identified that the Icam1 gene and ICAM-1 protein were selectively elevated in female NOD mice relative to male mice, fitting with the sexual dimorphism of diabetes onset in this key mouse model of T1D. In addition, ICAM-1 abundance was greater in hyperglycemic female NOD mice than in age-matched normoglycemic female NOD mice. Moreover, we discovered that the Icam1 gene was rapidly upregulated in response to IL-1β in mouse, rat, and human islets and in 832/13 rat insulinoma cells. This early temporal genetic regulation requires key components of the NF-κB pathway and was associated with rapid recruitment of the p65 transcriptional subunit of NF-κB to corresponding κB elements within the Icam1 gene promoter. In addition, RNA polymerase II recruitment to the Icam1 gene promoter in response to IL-1β was consistent with p65 occupancy at κB elements, histone chemical modifications, and increased mRNA abundance. Thus, we conclude that β-cells undergo rapid genetic reprogramming by IL-1β to enhance expression of the Icam1 gene and that elevations in ICAM-1 are associated with hyperglycemia in NOD mice. These findings are highly relevant to, and highlight the importance of, pancreatic β-cell communication with the immune system. Collectively, these observations reveal a portion of the complex molecular events associated with onset and progression of T1D.
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Affiliation(s)
- Thomas M. Martin
- Laboratory of Islet Biology and Inflammation, Pennington Biomedical Research Center Baton Rouge LA 70808 USA
| | - Susan J. Burke
- Laboratory of Immunogenetics, Pennington Biomedical Research Center Baton Rouge LA 70808 USA
| | - Heidi M. Batdorf
- Laboratory of Islet Biology and Inflammation, Pennington Biomedical Research Center Baton Rouge LA 70808 USA
| | - David H. Burk
- Cell Biology and Bioimaging Core, Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
| | - Sujoy Ghosh
- Laboratory of Computational Biology, Pennington Biomedical Research Center, Baton Rouge, LA, United States
- Centre for Computational Biology and Program in Cardiovascular and Metabolic Disorders, Duke NUS Medical School, Singapore
| | - Samuel D. Dupuy
- Department of Surgery, University of Tennessee Health Science Center, Knoxville, TN, 37920, USA
| | - Michael D. Karlstad
- Department of Surgery, University of Tennessee Health Science Center, Knoxville, TN, 37920, USA
| | - J. Jason Collier
- Laboratory of Islet Biology and Inflammation, Pennington Biomedical Research Center Baton Rouge LA 70808 USA
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4
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Kappen C, Kruger C, Jones S, Salbaum JM. Nutrient Transporter Gene Expression in the Early Conceptus-Implications From Two Mouse Models of Diabetic Pregnancy. Front Cell Dev Biol 2022; 10:777844. [PMID: 35478964 PMCID: PMC9035823 DOI: 10.3389/fcell.2022.777844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 02/28/2022] [Indexed: 11/29/2022] Open
Abstract
Maternal diabetes in early pregnancy increases the risk for birth defects in the offspring, particularly heart, and neural tube defects. While elevated glucose levels are characteristic for diabetic pregnancies, these are also accompanied by hyperlipidemia, indicating altered nutrient availability. We therefore investigated whether changes in the expression of nutrient transporters at the conception site or in the early post-implantation embryo could account for increased birth defect incidence at later developmental stages. Focusing on glucose and fatty acid transporters, we measured their expression by RT-PCR in the spontaneously diabetic non-obese mouse strain NOD, and in pregnant FVB/N mouse strain dams with Streptozotocin-induced diabetes. Sites of expression in the deciduum, extra-embryonic, and embryonic tissues were determined by RNAscope in situ hybridization. While maternal diabetes had no apparent effects on levels or cellular profiles of expression, we detected striking cell-type specificity of particular nutrient transporters. For examples, Slc2a2/Glut2 expression was restricted to the endodermal cells of the visceral yolk sac, while Slc2a1/Glut1 expression was limited to the mesodermal compartment; Slc27a4/Fatp4 and Slc27a3/Fatp3 also exhibited reciprocally exclusive expression in the endodermal and mesodermal compartments of the yolk sac, respectively. These findings not only highlight the significance of nutrient transporters in the intrauterine environment, but also raise important implications for the etiology of birth defects in diabetic pregnancies, and for strategies aimed at reducing birth defects risk by nutrient supplementation.
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Affiliation(s)
- Claudia Kappen
- Department of Developmental Biology, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, United States
| | - Claudia Kruger
- Department of Developmental Biology, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, United States
| | - Sydney Jones
- Regulation of Gene Expression, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, United States
| | - J. Michael Salbaum
- Regulation of Gene Expression, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, United States
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5
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Au KS, Hebert L, Hillman P, Baker C, Brown MR, Kim DK, Soldano K, Garrett M, Ashley-Koch A, Lee S, Gleeson J, Hixson JE, Morrison AC, Northrup H. Human myelomeningocele risk and ultra-rare deleterious variants in genes associated with cilium, WNT-signaling, ECM, cytoskeleton and cell migration. Sci Rep 2021; 11:3639. [PMID: 33574475 PMCID: PMC7878900 DOI: 10.1038/s41598-021-83058-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 01/28/2021] [Indexed: 01/08/2023] Open
Abstract
Myelomeningocele (MMC) affects one in 1000 newborns annually worldwide and each surviving child faces tremendous lifetime medical and caregiving burdens. Both genetic and environmental factors contribute to disease risk but the mechanism is unclear. This study examined 506 MMC subjects for ultra-rare deleterious variants (URDVs, absent in gnomAD v2.1.1 controls that have Combined Annotation Dependent Depletion score ≥ 20) in candidate genes either known to cause abnormal neural tube closure in animals or previously associated with human MMC in the current study cohort. Approximately 70% of the study subjects carried one to nine URDVs among 302 candidate genes. Half of the study subjects carried heterozygous URDVs in multiple genes involved in the structure and/or function of cilium, cytoskeleton, extracellular matrix, WNT signaling, and/or cell migration. Another 20% of the study subjects carried heterozygous URDVs in candidate genes associated with gene transcription regulation, folate metabolism, or glucose metabolism. Presence of URDVs in the candidate genes involving these biological function groups may elevate the risk of developing myelomeningocele in the study cohort.
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Affiliation(s)
- K S Au
- Division of Medical Genetics, Department of Pediatrics, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA.
| | - L Hebert
- Division of Medical Genetics, Department of Pediatrics, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
| | - P Hillman
- Division of Medical Genetics, Department of Pediatrics, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
| | - C Baker
- Division of Medical Genetics, Department of Pediatrics, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA.,Munroe-Meyer Institute, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - M R Brown
- Department of Epidemiology, Human Genetics and Environmental Sciences, School of Public Health, University of Texas Health Science Center At Houston, Houston, TX, 77030, USA
| | - D-K Kim
- Department of Epidemiology, Human Genetics and Environmental Sciences, School of Public Health, University of Texas Health Science Center At Houston, Houston, TX, 77030, USA
| | - K Soldano
- Department of Medicine, Duke University Medical Center, Durham, NC, 27701, USA
| | - M Garrett
- Department of Medicine, Duke University Medical Center, Durham, NC, 27701, USA
| | - A Ashley-Koch
- Department of Medicine, Duke University Medical Center, Durham, NC, 27701, USA
| | - S Lee
- Department of Neurosciences and Pediatrics, University of California-San Diego, La Jolla, CA, 92093, USA.,Rady Children's Institute for Genomic Medicine, San Diego, CA, 92025, USA
| | - J Gleeson
- Department of Neurosciences and Pediatrics, University of California-San Diego, La Jolla, CA, 92093, USA.,Rady Children's Institute for Genomic Medicine, San Diego, CA, 92025, USA
| | - J E Hixson
- Department of Epidemiology, Human Genetics and Environmental Sciences, School of Public Health, University of Texas Health Science Center At Houston, Houston, TX, 77030, USA
| | - A C Morrison
- Department of Epidemiology, Human Genetics and Environmental Sciences, School of Public Health, University of Texas Health Science Center At Houston, Houston, TX, 77030, USA
| | - H Northrup
- Division of Medical Genetics, Department of Pediatrics, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
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6
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López‐Escobar B, Wlodarczyk BJ, Caro‐Vega J, Lin Y, Finnell RH, Ybot‐González P. The interaction of maternal diabetes with mutations that affect folate metabolism and how they affect the development of neural tube defects in mice. Dev Dyn 2019; 248:900-917. [DOI: 10.1002/dvdy.92] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 07/18/2019] [Accepted: 07/21/2019] [Indexed: 12/17/2022] Open
Affiliation(s)
- Beatriz López‐Escobar
- Neurodevelopment Research GroupInstitute of Biomedicine of Seville/Hospital Virgen del Rocio/US/CSIC Sevilla Spain
- Department of Nutritional SciencesDell Pediatric Research Institute, The University of Texas at Austin Austin Texas USA
| | - Bogdan J. Wlodarczyk
- Department of Nutritional SciencesDell Pediatric Research Institute, The University of Texas at Austin Austin Texas USA
- Departments of Molecular and Cellular Biology and MedicineBaylor College of Medicine Houston Texas USA
| | - Jose Caro‐Vega
- Neurodevelopment Research GroupInstitute of Biomedicine of Seville/Hospital Virgen del Rocio/US/CSIC Sevilla Spain
| | - Ying Lin
- Department of Nutritional SciencesDell Pediatric Research Institute, The University of Texas at Austin Austin Texas USA
- Departments of Molecular and Cellular Biology and MedicineBaylor College of Medicine Houston Texas USA
| | - Richard H. Finnell
- Department of Nutritional SciencesDell Pediatric Research Institute, The University of Texas at Austin Austin Texas USA
- Departments of Molecular and Cellular Biology and MedicineBaylor College of Medicine Houston Texas USA
| | - Patricia Ybot‐González
- Neurodevelopment Research GroupInstitute of Biomedicine of Seville/Hospital Virgen del Rocio/US/CSIC Sevilla Spain
- Department of Neurology and NeurofisiologyHospital Virgen de Macarena Sevilla Spain
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7
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Ghosh S, Wicks SE, Vandanmagsar B, Mendoza TM, Bayless DS, Salbaum JM, Dearth SP, Campagna SR, Mynatt RL, Noland RC. Extensive metabolic remodeling after limiting mitochondrial lipid burden is consistent with an improved metabolic health profile. J Biol Chem 2019; 294:12313-12327. [PMID: 31097541 PMCID: PMC6699851 DOI: 10.1074/jbc.ra118.006074] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 04/29/2019] [Indexed: 01/19/2023] Open
Abstract
Mitochondrial lipid overload in skeletal muscle contributes to insulin resistance, and strategies limiting this lipid pressure improve glucose homeostasis; however, comprehensive cellular adaptations that occur in response to such an intervention have not been reported. Herein, mice with skeletal muscle-specific deletion of carnitine palmitoyltransferase 1b (Cpt1bM-/-), which limits mitochondrial lipid entry, were fed a moderate fat (25%) diet, and samples were subjected to a multimodal analysis merging transcriptomics, proteomics, and nontargeted metabolomics to characterize the coordinated multilevel cellular responses that occur when mitochondrial lipid burden is mitigated. Limiting mitochondrial fat entry predictably improves glucose homeostasis; however, remodeling of glucose metabolism pathways pales compared with adaptations in amino acid and lipid metabolism pathways, shifts in nucleotide metabolites, and biogenesis of mitochondria and peroxisomes. Despite impaired fat utilization, Cpt1bM-/- mice have increased acetyl-CoA (14-fold) and NADH (2-fold), indicating metabolic shifts yield sufficient precursors to meet energy demand; however, this does not translate to enhance energy status as Cpt1bM-/- mice have low ATP and high AMP levels, signifying energy deficit. Comparative analysis of transcriptomic data with disease-associated gene-sets not only predicted reduced risk of glucose metabolism disorders but was also consistent with lower risk for hepatic steatosis, cardiac hypertrophy, and premature death. Collectively, these results suggest induction of metabolic inefficiency under conditions of energy surfeit likely contributes to improvements in metabolic health when mitochondrial lipid burden is mitigated. Moreover, the breadth of disease states to which mechanisms induced by muscle-specific Cpt1b inhibition may mediate health benefits could be more extensive than previously predicted.
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Affiliation(s)
- Sujoy Ghosh
- Laboratory of Computational Biology, Pennington Biomedical Research Center, Baton Rouge, Louisiana 70808; Program in Cardiovascular and Metabolic Disorders and Center for Computational Biology, Duke-National University of Singapore Medical School, Singapore 169857, Singapore
| | - Shawna E Wicks
- Talaria Antibodies, Inc., Pennington Biomedical Research Center, Baton Rouge, Louisiana 70808; Gene Nutrient Interactions Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana 70808
| | - Bolormaa Vandanmagsar
- Gene Nutrient Interactions Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana 70808
| | - Tamra M Mendoza
- Gene Nutrient Interactions Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana 70808
| | - David S Bayless
- Gene Nutrient Interactions Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana 70808
| | - J Michael Salbaum
- Genomics Core Facility, Pennington Biomedical Research Center, Baton Rouge, Louisiana 70808
| | - Stephen P Dearth
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996
| | - Shawn R Campagna
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996
| | - Randall L Mynatt
- Gene Nutrient Interactions Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana 70808; Transgenic Core Facility, Pennington Biomedical Research Center, Baton Rouge, Louisiana 70808
| | - Robert C Noland
- Skeletal Muscle Metabolism Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana 70808.
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8
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Mynatt RL, Noland RC, Elks CM, Vandanmagsar B, Bayless DS, Stone AC, Ghosh S, Ravussin E, Warfel JD. The RNA binding protein HuR influences skeletal muscle metabolic flexibility in rodents and humans. Metabolism 2019; 97:40-49. [PMID: 31129047 PMCID: PMC6624076 DOI: 10.1016/j.metabol.2019.05.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 05/04/2019] [Accepted: 05/21/2019] [Indexed: 11/28/2022]
Abstract
BACKGROUND Metabolic flexibility can be assessed by changes in respiratory exchange ratio (RER) following feeding. Though metabolic flexibility (difference in RER between fasted and fed state) is often impaired in individuals with obesity or type 2 diabetes, the cellular processes contributing to this impairment are unclear. MATERIALS AND METHODS From several clinical studies we identified the 16 most and 14 least metabolically flexible male and female subjects out of >100 participants based on differences between 24-hour and sleep RER measured in a whole-room indirect calorimeter. Global skeletal muscle gene expression profiles revealed that, in metabolically flexible subjects, transcripts regulated by the RNA binding protein, HuR, are enriched. We generated and characterized mice with a skeletal muscle-specific knockout of the HuR encoding gene, Elavl1 (HuRm-/-). RESULTS Male, but not female, HuRm-/- mice exhibit metabolic inflexibility, with mild obesity, impaired glucose tolerance, impaired fat oxidation and decreased in vitro palmitate oxidation compared to HuRfl/fl littermates. Expression levels of genes involved in mitochondrial fatty acid oxidation and oxidative phosphorylation are decreased in both mouse and human muscle when HuR is inhibited. CONCLUSIONS HuR inhibition results in impaired metabolic flexibility and decreased lipid oxidation, suggesting a role for HuR as an important regulator of skeletal muscle metabolism.
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Affiliation(s)
- Randall L Mynatt
- Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA, United States of America
| | - Robert C Noland
- Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA, United States of America
| | - Carrie M Elks
- Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA, United States of America
| | - Bolormaa Vandanmagsar
- Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA, United States of America
| | - David S Bayless
- Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA, United States of America
| | - Allison C Stone
- Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA, United States of America
| | - Sujoy Ghosh
- Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA, United States of America; Computational Biology and Program in Cardiovascular and Metabolic Disorders, Duke-NUS Graduate Medical School, Singapore, Singapore
| | - Eric Ravussin
- Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA, United States of America
| | - Jaycob D Warfel
- Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA, United States of America.
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9
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Basu M, Garg V. Maternal hyperglycemia and fetal cardiac development: Clinical impact and underlying mechanisms. Birth Defects Res 2019; 110:1504-1516. [PMID: 30576094 DOI: 10.1002/bdr2.1435] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 11/16/2018] [Indexed: 12/15/2022]
Abstract
Congenital heart disease (CHD) is the most common type of birth defect and is both a significant pediatric and adult health problem, in light of a growing population of survivors. The etiology of CHD has been considered to be multifactorial with genetic and environmental factors playing important roles. The combination of advances in cardiac developmental biology, which have resulted in the elucidation of molecular pathways regulating normal cardiac morphogenesis, and genome sequencing technology have allowed the discovery of numerous genetic contributors of CHD ranging from chromosomal abnormalities to single gene variants. Conversely, mechanistic details of the contribution of environmental factors to CHD remain unknown. Maternal diabetes mellitus (matDM) is a well-established and increasingly prevalent environmental risk factor for CHD, but the underlying etiologic mechanisms by which pregestational matDM increases the vulnerability of embryos to cardiac malformations remains largely elusive. Here, we will briefly discuss the multifactorial etiology of CHD with a focus on the epidemiologic link between matDM and CHD. We will describe the animal models used to study the underlying mechanisms between matDM and CHD and review the numerous cellular and molecular pathways affected by maternal hyperglycemia in the developing heart. Last, we discuss how this increased understanding may open the door for the development of novel prevention strategies to reduce the incidence of CHD in this high-risk population.
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Affiliation(s)
- Madhumita Basu
- Center for Cardiovascular Research and Heart Center, Nationwide Children's Hospital, Columbus, Ohio.,Department of Pediatrics, The Ohio State University, Columbus, Ohio
| | - Vidu Garg
- Center for Cardiovascular Research and Heart Center, Nationwide Children's Hospital, Columbus, Ohio.,Department of Pediatrics, The Ohio State University, Columbus, Ohio.,Department of Molecular Genetics, The Ohio State University, Columbus, Ohio
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10
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Herion NJ, Kruger C, Staszkiewicz J, Kappen C, Salbaum JM. Embryonic cell migratory capacity is impaired upon exposure to glucose in vivo and in vitro. Birth Defects Res 2018; 111:999-1012. [PMID: 30451383 DOI: 10.1002/bdr2.1398] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 08/21/2018] [Accepted: 08/23/2018] [Indexed: 12/27/2022]
Abstract
BACKGROUND Impairments in cell migration during vertebrate gastrulation lead to structural birth defects, such as heart defects and neural tube defects. These defects are more frequent in progeny from diabetic pregnancies, and we have recently provided evidence that maternal diabetes leads to impaired migration of embryonic mesodermal cells in a mouse model of diabetic pregnancy. METHODS We here report the isolation of primary cell lines from normal and diabetes-exposed embryos of the nonobese diabetic mouse strain, and characterization of their energy metabolism and expression of nutrient transporter genes by quantitative real-time PCR. RESULTS Expression levels of several genes in the glucose transporter and fatty acid transporter gene families were altered in diabetes-exposed cells. Notably, primary cells from embryos with prior in vivo exposure to maternal diabetes exhibited reduced capacity for cell migration in vitro. CONCLUSIONS Primary cells isolated from diabetes-exposed embryos retained a "memory" of their in vivo exposure, manifesting in cell migration impairment. Thus, we have successfully established an in vitro experimental model for the mesoderm migration defects observed in diabetes-exposed mouse embryos.
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Affiliation(s)
- Nils Janis Herion
- University of Heidelberg Medical School, Heidelberg, Germany.,Department of Developmental Biology, Pennington Biomedical Research Center, Baton Rouge, Louisiana
| | - Claudia Kruger
- Department of Developmental Biology, Pennington Biomedical Research Center, Baton Rouge, Louisiana
| | - Jaroslaw Staszkiewicz
- Department of Developmental Biology, Pennington Biomedical Research Center, Baton Rouge, Louisiana
| | - Claudia Kappen
- Department of Developmental Biology, Pennington Biomedical Research Center, Baton Rouge, Louisiana
| | - J Michael Salbaum
- Department of Regulation of Gene Expression, Pennington Biomedical Research Center, Baton Rouge, Louisiana
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11
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Chen VS, Morrison JP, Southwell MF, Foley JF, Bolon B, Elmore SA. Histology Atlas of the Developing Prenatal and Postnatal Mouse Central Nervous System, with Emphasis on Prenatal Days E7.5 to E18.5. Toxicol Pathol 2017; 45:705-744. [PMID: 28891434 DOI: 10.1177/0192623317728134] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Evaluation of the central nervous system (CNS) in the developing mouse presents unique challenges, given the complexity of ontogenesis, marked structural reorganization over very short distances in 3 dimensions each hour, and numerous developmental events susceptible to genetic and environmental influences. Developmental defects affecting the brain and spinal cord arise frequently both in utero and perinatally as spontaneous events, following teratogen exposure, and as sequelae to induced mutations and thus are a common factor in embryonic and perinatal lethality in many mouse models. Knowledge of normal organ and cellular architecture and differentiation throughout the mouse's life span is crucial to identify and characterize neurodevelopmental lesions. By providing a well-illustrated overview summarizing major events of normal in utero and perinatal mouse CNS development with examples of common developmental abnormalities, this annotated, color atlas can be used to identify normal structure and histology when phenotyping genetically engineered mice and will enhance efforts to describe and interpret brain and spinal cord malformations as causes of mouse embryonic and perinatal lethal phenotypes. The schematics and images in this atlas illustrate major developmental events during gestation from embryonic day (E)7.5 to E18.5 and after birth from postnatal day (P)1 to P21.
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Affiliation(s)
- Vivian S Chen
- 1 Charles River Laboratories Inc., Durham, North Carolina, USA.,Authors contributed equally
| | - James P Morrison
- 2 Charles River Laboratories Inc., Shrewsbury, Massachusetts, USA.,Authors contributed equally
| | - Myra F Southwell
- 3 Cellular Molecular Pathology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
| | - Julie F Foley
- 4 Bio-Molecular Screening Branch, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
| | | | - Susan A Elmore
- 3 Cellular Molecular Pathology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
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Wang F, Xu C, Reece EA, Li X, Wu Y, Harman C, Yu J, Dong D, Wang C, Yang P, Zhong J, Yang P. Protein kinase C-alpha suppresses autophagy and induces neural tube defects via miR-129-2 in diabetic pregnancy. Nat Commun 2017; 8:15182. [PMID: 28474670 PMCID: PMC5424165 DOI: 10.1038/ncomms15182] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 03/03/2017] [Indexed: 12/19/2022] Open
Abstract
Gene deletion-induced autophagy deficiency leads to neural tube defects (NTDs), similar to those in diabetic pregnancy. Here we report the key autophagy regulators modulated by diabetes in the murine developing neuroepithelium. Diabetes predominantly leads to exencephaly, induces neuroepithelial cell apoptosis and suppresses autophagy in the forebrain and midbrain of NTD embryos. Deleting the Prkca gene, which encodes PKCα, reverses diabetes-induced autophagy impairment, cellular organelle stress and apoptosis, leading to an NTD reduction. PKCα increases the expression of miR-129-2, which is a negative regulator of autophagy. miR-129-2 represses autophagy by directly targeting PGC-1α, a positive regulator for mitochondrial function, which is disturbed by maternal diabetes. PGC-1α supports neurulation by stimulating autophagy in neuroepithelial cells. These findings identify two negative autophagy regulators, PKCα and miR-129-2, which mediate the teratogenicity of hyperglycaemia leading to NTDs. We also reveal a function for PGC-1α in embryonic development through promoting autophagy and ameliorating hyperglycaemia-induced NTDs.
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Affiliation(s)
- Fang Wang
- Department of Obstetrics, Gynecology & Reproductive Sciences, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
| | - Cheng Xu
- Department of Obstetrics, Gynecology & Reproductive Sciences, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
| | - E. Albert Reece
- Department of Obstetrics, Gynecology & Reproductive Sciences, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
- Department of Biochemistry & Molecular Biology, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
| | - Xuezheng Li
- Department of Obstetrics, Gynecology & Reproductive Sciences, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
| | - Yanqing Wu
- Department of Obstetrics, Gynecology & Reproductive Sciences, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
| | - Christopher Harman
- Department of Obstetrics, Gynecology & Reproductive Sciences, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
| | - Jingwen Yu
- Department of Obstetrics, Gynecology & Reproductive Sciences, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
| | - Daoyin Dong
- Department of Obstetrics, Gynecology & Reproductive Sciences, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
| | - Cheng Wang
- Department of Obstetrics, Gynecology, Nebraska Medical Center, Omaha, Nebraska 68198, USA
| | - Penghua Yang
- Department of Obstetrics, Gynecology & Reproductive Sciences, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
| | - Jianxiang Zhong
- Department of Obstetrics, Gynecology & Reproductive Sciences, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
| | - Peixin Yang
- Department of Obstetrics, Gynecology & Reproductive Sciences, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
- Department of Biochemistry & Molecular Biology, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
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13
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Mitochondrial fat oxidation is essential for lipid-induced inflammation in skeletal muscle in mice. Sci Rep 2016; 6:37941. [PMID: 27892502 PMCID: PMC5124994 DOI: 10.1038/srep37941] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 11/02/2016] [Indexed: 02/07/2023] Open
Abstract
Inflammation, lipotoxicity and mitochondrial dysfunction have been implicated in the pathogenesis of obesity-induced insulin resistance and type 2 diabetes. However, how these factors are intertwined in the development of obesity/insulin resistance remains unclear. Here, we examine the role of mitochondrial fat oxidation on lipid-induced inflammation in skeletal muscle. We used skeletal muscle-specific Cpt1b knockout mouse model where the inhibition of mitochondrial fatty acid oxidation results in accumulation of lipid metabolites in muscle and elevated circulating free fatty acids. Gene expression of pro-inflammatory cytokines, chemokines, and cytokine- and members of TLR-signalling pathways were decreased in Cpt1bm−/− muscle. Inflammatory signalling pathways were not activated when evaluated by multiplex and immunoblot analysis. In addition, the inflammatory response to fatty acids was reduced in primary muscle cells derived from Cpt1bm−/− mice. Gene expression of Cd11c, the M1 macrophage marker, was decreased; while Cd206, the M2 macrophage marker, was increased in skeletal muscle of Cpt1bm−/− mice. Finally, expression of pro-inflammatory markers was decreased in white adipose tissue of Cpt1bm−/− mice. We show that the inflammatory response elicited by elevated intracellular lipids in skeletal muscle is repressed in Cpt1bm−/− mice, strongly supporting the hypothesis that mitochondrial processing of fatty acids is essential for the lipid-induction of inflammation in muscle.
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