Alterations in the hepatic epigenome in mice exposed to a maternal high fat diet in utero
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PROVIDER: PRJNA310332 | ENA |
REPOSITORIES: ENA
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Project description:Exposure to a high fat (HF) diet in utero is associated with increased incidence of cardiovascular disease, diabetes and metabolic syndrome later in life. However, the molecular basis of this enhanced susceptibility for metabolic disease is poorly understood. We performed genome-wide DNA methylation analysis to examine DNA methylation patterns in liver of offspring exposed to a Control or HF maternal diet. WT mice were fed a C (9.5% fat, 3.59 kcal/g) or HF (35.5% fat, 5.29 kcal/g) diet for 2 wk before mating, throughout pregnancy and lactation. Offspring were weaned to a low fat (5.6% fat, 3.4 kcal/g) diet and were sacrificed at 5wks of age. DNA methylation analysis revealed the majority of differentially methylated regions were hypermethylated in HF liver. Chromosomal distribution analysis showed hypermethylation hot spots on chromosomes 4 (atherosclerosis susceptibility QTL1) and 18 (insulin dependent susceptibility 21). Most of the hypermethylated genes in these hot spots are associated with cardiovascular system development and function. In summary, exposure to a maternal HF diet significantly alters the DNA methylation patterns in the liver of exposed offspring and contributes to programmed development of metabolic disease later in life.
2017-10-02 | GSE77430 | GEO
Project description:This SuperSeries is composed of the SubSeries listed below.
2017-10-02 | GSE77432 | GEO
Project description:Exposure to a high fat (HF) diet in utero is associated with increased incidence of cardiovascular disease, diabetes and metabolic syndrome later in life. However, the molecular basis of this enhanced susceptibility for metabolic disease is poorly understood. We used gene expression microarray to examine mRNA expression patterns in liver of offspring exposed to a Control or HF maternal diet. WT mice were fed a Control (9.5% fat, 3.59 kcal/g) or HF (35.5% fat, 5.29 kcal/g) diet for 2 wk before mating, throughout pregnancy and lactation. Offspring were weaned to a low fat (5.6% fat, 3.4 kcal/g) diet and were sacrificed at 5wks of age. Exposure to a maternal HF milieu activated genes of immune response, inflammation, and hepatic dysfunction. Conversely genes of lipid metabolism and biogenesis were down regulated especially in the cholesterol biosynthesis pathway. In summary, exposure to a maternal HF diet significantly alters the gene expression patterns in the liver of exposed offspring and contributes to development of metabolic disease later in life.
2017-10-02 | GSE77431 | GEO
Project description:Obesity and metabolic disease present a danger to long-term health outcomes. It has been hypothesized that epigenetic marks established during early life might program individuals and have either beneficial or harmful consequences later in life. In the present study, we examined whether maternal diet alters DNA methylation and whether such modifications persist after an obesogenic postnatal dietary challenge. During gestation and lactation, male Sprague-Dawley rats were exposed to either a high-fat diet (HF; n = 10) or low-fat diet (LF; n = 10). After weaning, all animals were fed a HF diet for an additional nine weeks. There were no differences observed in food intake or body weight between groups. Hepatic DNA methylation was quantified using both methylated DNA immunoprecipitation sequencing (MeDIP-seq) and methylation-sensitive restriction enzyme sequencing (MRE-seq). Overall, 1419 differentially methylated regions (DMRs) were identified. DMRs tended to be located in CpG shores and were enriched for genes involved in metabolism and cancer. Gene expression was measured for 31 genes in these pathways. Map3k5 and Igf1r were confirmed to be differentially expressed. Finally, we attempted to quantify the functional relevance of intergenic DMRs. Using chromatin contact data, we saw that conserved DMRs were topologically associated with metabolism genes, which were associated with differential expression of Adh5, Enox1, and Pik3c3. We show that although maternal dietary fat is unable to reverse offspring weight gain in response to a postnatal obesogenic diet, early life diet does program the hepatic methylome. Epigenetic alterations occur primarily in metabolic and cancer pathways and are associated with altered gene expression, but it is unclear whether they bear consequence later in life.
| S-EPMC6769607 | biostudies-literature
Project description:In utero heat stress alters the offspring epigenome
| PRJNA488483 | ENA
Project description:In utero heat stress alters the offspring epigenome [methylation]
| PRJNA489263 | ENA
Project description:Background: Maternal smoking during pregnancy is a major risk factor for adverse health outcomes. The main objective of the study was to assess the impact of in utero tobacco exposure on DNA methylation in children born at term with appropriate weight at birth. Methods: Twenty mother-newborn dyads, after uncomplicated pregnancies, in the absence of perinatal illness were included. All mothers were healthy with no cardiovascular risk factors, except for the associated risks among those mothers who smoked. Umbilical cord blood (for methylation arrays) and maternal peripheral venous blood (for cotine level measurement) were collected and an epigenome-wide association study was performed using a 450K epigenome-wide scan (Illumina Infinium HumanMethylation 450BeadChip) with adjustment to normalize the DNA methylation for data cell variability in whole blood. Results: The maternal plasmatic cotinine levels ranged from 10.70-115.40 ng/ml in the exposed group to 0-0.59 ng/ml in the non-exposed group. After adjusting for multiple comparisons in 427102 probes, statistically significant differences for 31 CpG sites, associated to 25 genes were observed. There was a greater than expected proportion of statistically-significant loci located in CpG islands (FisherM-bM-^@M-^Ys exact test, p=0.029) and of those CpG islands, 90.3% exhibit higher methylation levels in the exposed group. The most striking and significant CpG site, cg05727225, is located in the chromosome 11p15.4, within the adrenomedullin gene. Conclusions: In utero tobacco exposure, even in the absence of fetal growth restriction, may alter the epigenome, contributing to global DNA hypomethylation. Therefore, DNA status can be used as a biomarker of prenatal insults. Considering the possibility to reverse epigenetic modifications, a window of opportunity exists to change the programmed chronic disease. Twenty mother-newborn dyads, after uncomplicated pregnancies, in the absence of perinatal illness were included. All mothers were healthy with no cardiovascular risk factors, except for the associated risks among those mothers who smoked. Umbilical cord blood were collected and an epigenome-wide association study was performed using a 450K epigenome-wide scan (Illumina Infinium HumanMethylation 450BeadChip) with adjustment to normalize the DNA methylation for data cell variability in whole blood.
2015-02-16 | E-GEOD-64316 | biostudies-arrayexpress
Project description:Background: Maternal smoking during pregnancy is a major risk factor for adverse health outcomes. The main objective of the study was to assess the impact of in utero tobacco exposure on DNA methylation in children born at term with appropriate weight at birth. Methods: Twenty mother-newborn dyads, after uncomplicated pregnancies, in the absence of perinatal illness were included. All mothers were healthy with no cardiovascular risk factors, except for the associated risks among those mothers who smoked. Umbilical cord blood (for methylation arrays) and maternal peripheral venous blood (for cotine level measurement) were collected and an epigenome-wide association study was performed using a 450K epigenome-wide scan (Illumina Infinium HumanMethylation 450BeadChip) with adjustment to normalize the DNA methylation for data cell variability in whole blood. Results: The maternal plasmatic cotinine levels ranged from 10.70-115.40 ng/ml in the exposed group to 0-0.59 ng/ml in the non-exposed group. After adjusting for multiple comparisons in 427102 probes, statistically significant differences for 31 CpG sites, associated to 25 genes were observed. There was a greater than expected proportion of statistically-significant loci located in CpG islands (Fisher’s exact test, p=0.029) and of those CpG islands, 90.3% exhibit higher methylation levels in the exposed group. The most striking and significant CpG site, cg05727225, is located in the chromosome 11p15.4, within the adrenomedullin gene. Conclusions: In utero tobacco exposure, even in the absence of fetal growth restriction, may alter the epigenome, contributing to global DNA hypomethylation. Therefore, DNA status can be used as a biomarker of prenatal insults. Considering the possibility to reverse epigenetic modifications, a window of opportunity exists to change the programmed chronic disease.
2015-02-16 | GSE64316 | GEO
Project description:Epidemiologic studies have clearly identified modifications of fetal environment as a risk factor for the development of cardiovascular diseases and of metabolic syndrome in adulthood. In our experimental model, rats exposed to maternal diabetes develop a volume-dependent hypertension as early as 6 month of age. In order to determine if the development of hypertension results from an abnormal vascular fetal programming, gene expression profile of thoracic aorta were studied in adult rats exposed in utero to maternal hyperglycemia.
2010-02-01 | GSE16750 | GEO
Project description:Background: Zidovudine remains the cornerstone drug for prophylaxis to prevent mother-to-child HIV-1 transmission. A mild but long-lasting hematological multilineage defect is observed in children exposed in utero. Objectives: To evaluate the effects of zidovudine-based ARV combinations on newborn cord blood cells. Methods: Cord blood-derived mononuclear cells from 22 HIV-1-uninfected newborn exposed in utero to a zidovudine-based ARV combination and from 20 healthy unexposed newborn were investigated by immunophenotyping, gene expression analysis, cytogenetic studies and functional capacity testing. To evaluate the effects of zidovudine-based ARV combinations on newborn cord blood cells.
2012-05-02 | E-GEOD-37748 | biostudies-arrayexpress