Contribution of Poly-unsaturated Fatty Acids on Cerebral Neurobiology: An Integrated Omics Approach with Epigenomic Focus [Agilent]
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PROVIDER: PRJNA842008 | ENA |
REPOSITORIES: ENA
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Project description:Contribution of Poly-unsaturated Fatty Acids on Cerebral Neurobiology: An Integrated Omics Approach with Epigenomic Focus
| PRJNA326279 | ENA
Project description:Fish oil or its major constituent, namely omega-3 poly-unsaturated fatty acid (n3-PUFA), are popular diets to improve neurogenesis, neuroprotection, and overall brain functions. A growing number of studies advocate for the balanced dietary supplements of n3- and n6-PUFA to maximize the brain functions. Our objective was to probe the implication of PUFA to ameliorate social stress (SS). Mice were fed a customized n-3 PUFA-enriched diet (ERD, n3:n6= 7:1), a balanced diet (BLD, n3:n6= 1:1) or a standard lab diet (STD, n3:n6= 1:6). Past reports linked these diets to brain transcriptomic regulations; hence, we aimed to investigate the effects of these diets on mice exposed to Aggressor-exposed SS (Agg-E SS) model. Mice randomly encountered life-threatening trauma from conspecific aggressor for 10 consecutive days. Stressed mice on STD showed multiple behavioral deficits that lingered even 6 weeks post-Agg-E SS. In comparison, ERD and BLD elevated bodyweights but potentially triggered behavioral resilience to SS. Comprehensive mapping of the behavioral traits projected a diet-specific variance, which was mirrored by the brain transcriptomic readouts. We focused on those brain transcriptomic networks that were exclusively perturbed by the cumulative effects of Diet, Stress and Time. STD adversely affected the gene networks associated with the cell mortality, energy homeostasis and neurodevelopment disorder; however, BLD showed long-term benefits in regulating these gene networks. Further titration of PUFA supplements in daily diets can reduce the adverse effects caused by unbalanced supplement of PUFA without compromising their health benefits.
2023-03-15 | GSE204718 | GEO
Project description:This SuperSeries is composed of the SubSeries listed below.
2017-07-31 | GSE83545 | GEO
Project description:The epigenetic landscape is vulnerable to variations in diet. Here, we investigated the influence of different PUFA dietary supplements on rodents’ nervous system development and functions and potential consequences for neurodegenerative disorders. We have previously studied the genomic plasticity of these biofunctions in mice fed on high n-3 PUFA enriched diet (ERD). In conjunction, in the present study, we introduced a second equicaloric diet with n-3 PUFA optimally balanced by n-6 PUFA (BLD). The typical lab diet with high n-6 PUFA was the baseline. Randomly grouped C57BL/6j mice were fed on any of these three diets from their neonatal age to late adolescent. Post-euthanasia, the transcriptomic landscape of hemibrains was investigated in parallel for two epigenetic mechanisms, namely the miRNA profile and DNA methylation. Integrating data we focused on those genes which had both hypermethylated CpG islands and silenced transcripts. Of these, 308 and 131 genes were perturbed by ERD and BLD, respectively, in comparison to the baseline. Also, miRNA:mRNA pairs were screened to identify those overexpressed miRNAs that silenced gene transcription. There were 18 and 39 miRNAs that met the cutoff in ERD- and BLD-fed mice, respectively. The majority of miRNAs overexpressed by BLD are associated with Alzheimer’s and schizophrenia. BLD allowed hypermethylation of those genes that enriched the networks associated with calcium-releasing neurotransmitters. Downstream networks leading to LTP, memory, cognition and learning were perturbed in sync. ERD permitted hypermethylation of genes that enrich the cytoskeletal development network and promote the formation of neuronal precursors. We present the conclusions taking into full account the limited knowledge regarding the epigenetic influence on biofunctions. Since this study has single time point, we could not verify if these functional attributes are the cause or the consequences of epigenetic plasticity. Hence, a more comprehensive study in this regard is essential.
2017-07-31 | GSE83543 | GEO
Project description:The epigenetic landscape is vulnerable to variations in diet. Here, we investigated the influence of different PUFA dietary supplements on rodents’ nervous system development and functions and potential consequences for neurodegenerative disorders. We have previously studied the genomic plasticity of these biofunctions in mice fed on high n-3 PUFA enriched diet (ERD). In conjunction, in the present study, we introduced a second equicaloric diet with n-3 PUFA optimally balanced by n-6 PUFA (BLD). The typical lab diet with high n-6 PUFA was the baseline. Randomly grouped C57BL/6j mice were fed on any of these three diets from their neonatal age to late adolescent. Post-euthanasia, the transcriptomic landscape of hemibrains was investigated in parallel for two epigenetic mechanisms, namely the miRNA profile and DNA methylation. Integrating data we focused on those genes which had both hypermethylated CpG islands and silenced transcripts. Of these, 308 and 131 genes were perturbed by ERD and BLD, respectively, in comparison to the baseline. Also, miRNA:mRNA pairs were screened to identify those overexpressed miRNAs that silenced gene transcription. There were 18 and 39 miRNAs that met the cutoff in ERD- and BLD-fed mice, respectively. The majority of miRNAs overexpressed by BLD are associated with Alzheimer’s and schizophrenia. BLD allowed hypermethylation of those genes that enriched the networks associated with calcium-releasing neurotransmitters. Downstream networks leading to LTP, memory, cognition and learning were perturbed in sync. ERD permitted hypermethylation of genes that enrich the cytoskeletal development network and promote the formation of neuronal precursors. We present the conclusions taking into full account the limited knowledge regarding the epigenetic influence on biofunctions. Since this study has single time point, we could not verify if these functional attributes are the cause or the consequences of epigenetic plasticity. Hence, a more comprehensive study in this regard is essential.
2017-07-31 | GSE83544 | GEO
Project description:Molecular Neurobiology of Loss
| PRJNA858028 | ENA
Project description:The aim of this study was to determine the effects of unprotected dietary unsaturated fatty acids (UFA) from different plant oils on gene expression in the mammary gland of grazing dairy cows. Milk composition and gene expression in the mammary gland tissue were evaluated in grazing dairy cows supplemented with different unsaturated fatty acids (UFA). The UFA supplementation improves the health and nutrition quality aspects of dairy milk, but also affects the gene networks expression signature associated with cellular growth and proliferation, cell-death, signalling, nutrient metabolism, and immune response, and in turn, the mammary gland integrity and health. SUBMITTER_CITATION: Mach, N., A. A. A. Jacobs, L. Kruijt, J. Van Baal, and M. A. Smits. 2011. Alteration of gene expression in mammary gland tissue of dairy cows in response to dietary unsaturated fatty acids. Animal.DOI:10.1017/S1751731111000103
2011-02-01 | GSE20909 | GEO
Project description:Molecular Neurobiology of Loss Part 2
| PRJNA858032 | ENA
Project description:Molecular Neurobiology of Loss Part 1
| PRJNA858031 | ENA
Project description:The aim of this study was to determine the effects of unprotected dietary unsaturated fatty acids (UFA) from different plant oils on gene expression in the mammary gland of grazing dairy cows. Milk composition and gene expression in the mammary gland tissue were evaluated in grazing dairy cows supplemented with different unsaturated fatty acids (UFA). The UFA supplementation improves the health and nutrition quality aspects of dairy milk, but also affects the gene networks expression signature associated with cellular growth and proliferation, cell-death, signalling, nutrient metabolism, and immune response, and in turn, the mammary gland integrity and health. A total of 28 Holstein-Friesian dairy cows in mid-lactation were blocked according to parity (2.4 ± 0.63 years), days in milk (DIM; 153 ± 32.8 days), milk yield (25.7 ± 3.08 kg/d) and fat content (4.3 ± 0.12%). Cows were then randomly assigned to four UFA-sources based on rapeseed, soybean, linseed or a mixture of the three oils for 23 days (Period I) after which, all 28 cows were switched to a control diet for an additional 28 days (Period II). On the last day of both periods, mammary gland biopsies were taken to study genome-wide differences in lipid metabolism gene expression.
2011-02-01 | E-GEOD-20909 | biostudies-arrayexpress