Maternal obesity alters neurotrophin-associated MAPK ignaling in the hypothalamus of male mouse offspring
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PROVIDER: PRJNA560221 | ENA |
REPOSITORIES: ENA
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Project description:In the present project we examined the effects of maternal obesity to offspring hypothalamic tissue at postnatal day (P) 21. Maternal obesity has emerged as an important risk factor for the development of metabolic disorders in the offspring.To obtain an overview of affected genes in the offsprings hypothalamus, the center of hunger and satiety in the brain, we performed whole genome microarray expression profiling. Female mice were fed either a control diet (SD) or a high fat diet (HFD) after weaning until mating and during pregnancy and gestation. On P21, male pups were sacrificed and blood samples were collected for further analyses. The hypothalamus was cut immediately caudal to the optic chiasm. The dissection was limited laterally by the hypothalamic sulci and dorsally by the mammillothalamic tract. Hypothalamic tissue was immediately frozen at −80° C. A maximum of two offspring per dam were analysed to minimize litter-dependent bias. All studies were performed using male offspring.
2019-08-15 | GSE135830 | GEO
Project description:Purpose:Maternal obesity has emerged as an important risk factor for the development of metabolic disorders in the offspring. The hypothalamus as the center of energy homeostasis regulation is known to function based on complex neuronal networks that evolve during fetal and early postnatal development and maintain their plasticity into adulthood. Development of hypothalamic feeding networks and their functional plasticity can be modulated by various metabolic cues, especially in early stages of development. Here, we aimed at determining the underlying molecular mechanisms that contribute to disturbed hypothalamic network formation in offspring of obese mouse dams. Methods:Female mice were fed either a control diet (CO) or a high-fat diet (HFD) after weaning until mating and during pregnancy and gestation. Male offspring was sacrificed at postnatal day (P) 21. The hypothalamus was subjected to gene array analysis, quantitative PCR and western blot analysis. Results:P21 HFD offspring displayed increased body weight, circulating insulin levels, and strongly increased activation of the hypothalamic insulin signaling cascade with a concomitant increase in ionized calcium binding adapter molecule 1 (IBA1) expression. At the same time, the global gene expression profile in CO and HFD offspring differed significantly. More specifically, manifest influences on several key pathways of hypothalamic neurogenesis, axogenesis, and regulation of synaptic transmission and plasticity were detectable. Target gene expression analysis revealed significantly decreased mRNA expression of several neurotrophic factors and co-factors and their receptors, accompanied by decreased activation of their respective intracellular signal transduction. Conclusion:Taken together, these results suggest a potential role for disturbed neurotrophin signaling and thus impaired neurogenesis, axogenesis, and synaptic plasticity in the pathogenesis of the offspring's hypothalamic feeding network dysfunction due to maternal obesity.
| S-EPMC6753176 | biostudies-literature
Project description:Changes in miRNA expression in offspring hypothalamus after exposure to maternal obesity
| PRJNA1086988 | ENA
Project description:Maternal overnutrition during pregnancy/or lactation predisposes offspring obesity and related metabolic syndromes in later life. Hypothalamus is the highest heterogeneous brain region located at the base of the brain that is critical to the regulation of the energy homeostasis.We investigated how the maternal programming shapes the single-nucleus transcriptomic landscapes in postnatal day15 offspring hypothalamus in a sex-specific manner.
2024-02-18 | GSE217677 | GEO
Project description:To investigate the materal dietary effects (HF, LP) on affecting DNA methylations in the mouse offspring hypothalamus.
2019-01-01 | GSE79619 | GEO
Project description:The purpose of this study was to identify miRNA that are differentially regulated in the arcuate nucleus of the hypothaamus (ARC) and paraventricular nucleus of the hypothalamus (PVH) after perinatal exposure to maternal obesity.
2024-03-13 | GSE261455 | GEO
Project description:Purpose: Identify the potential effector that might responding to the irritated hypothalamic ER stress as early as postnatal resulting from maternal obesity exposure. Methods: Three-week-old male offspring were selected for extracting RNA sample from the three groups (triplicate in sample): LP (Lg42_P1, Lg63_P2, Lg63_P3), HP (Hg43_P1, Hg43_P2, Hg13_P3) and HA (Hg43_A1, Hg43_A2, Hg13_A3). After standard RNA quantification and qualification, library preparation, clustering, sequencing and quality control, reads were mapped to the reference genome, and quantified of gene expression level with FPKM. The data were further processed for differential expression and other functional analysis. Results: We identified 789 differentially expressed genes (DEGs) (DESeq2, pvalue<0.05, |log2FoldChange|>0.0) in the mice from HP compared with those from LP, of which 408 (52%) were upregulated, while 381 (48%) downregulated. Whereas, for those of HA versus HP, 726 DEGs were detected, with 401 (55%) upregulated and 325 (45%) downregulated. There was a total of 158 overlapped DEGs between the two compared groups. In the following Gene Ontology enrichment analysis, we found that the upregulated DEGs in the HP group were significantly enriched in the categories related to molecular chaperon mediated protein processing. While for those downregulated DEGs in HA, similar theme was enriched with most of the genes from family members of the heat shock protein (Hsp), especially Hsp70. We validated the alteration of two members of Hsp70 in the hypothalamus of the weaning offspring given their crucial role in the stress response. Conclusions: Hspa1b might be the potential effector for the irritated early hypothalamic ER stress and the root of unbalanced stress balance in the hypothalamus undergoing feeding-related circuit axon projection in male offspring from obese dams.
2021-03-05 | GSE162744 | GEO
Project description:The global prevalence of obesity is increasing across age and gender. The rising burden of obesity in young people contributes to the early emergence of type 2 diabetes. Having one parent obese is an independent risk factor for childhood obesity. While the detrimental impact of diet-induced maternal obesity on offspring is well established, the extent of the contribution of obese fathers is unclear, as is the role of non-genetic factors in the casual pathway. Here we show that paternal high fat diet exposure programmed M-NM-2-cell M-bM-^@M-^XdysfunctionM-bM-^@M-^Y in their F1 female offspring. Chronic high fat diet consumption in Sprague Dawley fathers led to increased body weight, adiposity, impaired glucose tolerance and insulin sensitivity. Relative to controls, their female offspring had lower body weight at day-1, increased pubertal growth rate, impaired insulin secretion and glucose tolerance, in the absence of obesity or increased adiposity. Paternal high fat diet altered the expression of 211 pancreatic islet genes in adult female offspring (P < 0.001); genes belonged to 8 functional clusters, including calcium ion binding, primary metabolic processes and ATP binding, and organ/system development. Broader KEGG pathway analysis of 2014 genes differentially expressed at the P < 0.01 level further demonstrated involvement of insulin and calcium signaling, and MAPK pathways. This is the first reported study in mammals describing non-genetic, intergenerational transmission of metabolic sequelae of high fat diet from father to offspring. These findings support a role of fathers in metabolic programming of offspring and form a framework for further studies. F0 founders were male Sprague Dawley rats, divided into two groups: high fat (HF) and control. The HF fathers were given commercially prepared high-fat pellets (43% as fat), while the controls ate standard laboratory chow (9% as fat). The two groups of fathers had distinct phenotypes; the HF fathers were significantly heavier with increased adiposity, and they were also glucose intolerant and insulin resistant. At 15 weeks of age, fathers were mated with normal females consuming chow to generate the F1 offspring. Only female offspring were studied. Female offspring were weaned unto standard laboratory chow at 3 weeks. At 6 and 12 weeks, an intraperitoneal glucose tolerance test (IpGTT) was performed to measure blood glucose and insulin profile; at 11 weeks, an intraperitoneal insulin tolerance test was done. The body weight and adiposity of these offspring were not different between the two groups. The HF offspring had glucose intolerance and impaired glucose-induced insulin response, mainly at the acute phase, observed since 6 weeks. The IpITT was not different between groups. At 14 weeks, fat was harvested from the two groups of offspring.
2014-01-20 | E-GEOD-33551 | biostudies-arrayexpress
Project description:The global rise in obesity has revitalized a search to understand genetic, and in particular, epigenetic factors underlying the disease. We present a Drosophila model of paternal-diet-induced Inter-Generational Metabolic Reprogramming (IGMR) and identify genes required for its encoding in offspring. Intriguingly, we find that as little as two days of dietary intervention in fathers elicits obesity in offspring. Paternal sugar acts as a physiological suppressor of variegation, de-silencing chromatin state-defined transcriptional units in both mature sperm and in offspring embryos. We identify requirements for H3K9/K27me3 dependent reprogramming of metabolic genes in two distinct germline and zygotic windows. Critically, we find evidence that a similar system regulates obesity-susceptibility and phenotype variation in mice and humans. The findings provide insight into the mechanisms underlying intergenerational metabolic reprogramming and carry profound implications for our understanding of phenotypic variation and evolution. RNA-seq on Drosophila embryos and sperm samples fed medium and high sugar.
2014-12-04 | E-GEOD-62668 | biostudies-arrayexpress