Ontology highlight
ABSTRACT:
PROVIDER: PRJNA1010972 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR25907714_1.fastq.gz | Fastqsanger.gz | |||
| SRR25907714_2.fastq.gz | Fastqsanger.gz | |||
| SRR25907715_1.fastq.gz | Fastqsanger.gz | |||
| SRR25907715_2.fastq.gz | Fastqsanger.gz | |||
| SRR25907716_1.fastq.gz | Fastqsanger.gz |
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Project description:Lion-head goose is the only large goose species in China, and it was one of the largest goose species in the world. Our previous study firstly reported a chromosome-level genome assembly of Lion-head goose (Anser cygnoides), a native breed in South China, through the combination of PacBio, Bionano, and Hi-C technologies. The fat content of foie gras is augmented during its preparation due to the special feeding regimen. Lion-head geese have a strong tolerance of massive energy intake and show a priority of fat accumulation in liver tissue. In this study, we studied for the first time the important differential genes that regulate fatty liver in Lion-head goose. After high-intake feeding, the fatty livers of Lion-head geese were distinctly characterized. The revelation of gene regulation is an important basis for the study of liver development and molecular characteristics for the Lion-head goose. To analyze the excellent fatty liver performance of Lion-head goose at the molecular level, we performed whole transcriptome analysis by high-throughput RNA sequencing to analyze the key regulatory genes that determine the fatty livers in high-intake feeding group compared with the normal livers in normally-fed Lion-head geese. We identified 716 differentially expressed mRNAs, 145 differentially expressed circRNAs, and 39 differentially expressed lncRNAs in the fatty livers in high-intake feeding group compared with the normal livers in normally-fed Lion-head geese, including upregulated and downregulated genes, respectively. GO enrichment analysis showed that these genes were significantly enriched in molecular function, involved in extracellular regions, DNA-binding transcription factor activity, extracellular matrix, heme binding and other life activities. We chose differentially expressed genes involved in either upregulation or downregulation, and we additionally confirmed the accuracy of sequencing at the RNA level. In summary, our research suggested that these differentially expressed genes may play important roles in fatty liver development in Lion-head goose. However, the functions and mechanisms of these significantly differentially expressed genes should be investigated in future studies.
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Project description:RNA-sequencing analysis of liver gene expression after combinatorial liver-specific deletion of tumor suppressor genes in a mouse fatty liver disease and liver cancer model. Gene expression was determined at 16 weeks of age, before onset of liver tumor formation. Aim was to study how loss of atypical E2F transcription repressors affected gene expression in Pten-mutant livers.
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Project description:Replication protein A1 (RPA1) is a single-stranded DNA binding protein that is known to participate in DNA replication, recombination and damage repair. However, little is known about RPA1’s role in controlling chromatin architecture and gene transcription. Further, physiological functions of RPA1 in mouse tissues still remain exclusive. Here we show that Rpa1 heterozygous mice developed age-depended fatty liver disease and are more susceptible to hepatic steatosis in response to high-fat diet. Liver specific deletion of Rpa1 impairs fatty acid oxidation, leading to hepatic steatosis and high incidence of hepatocellular carcinoma. Transcriptome analysis identified down-regulation of fatty acid oxidation related genes. Cleavage Under Targets and Tagmentation (CUT&Tag) and Assay for transposase-accessible chromatin using sequencing (ATAC-seq) revealed that RPA1 binds and regulates chromatin accessibility in regulatory regions of a group of genes involved in lipid metabolism in liver. Further, down-regulation of RPA1 was found in patients with fatty liver disease. Thus, our results not only established that RPA1 is critical controller of chromatin architecture and regulator of gene transcription, but also provided new insights into the epigenetic mechanism of fatty liver disease, which could inform future therapy.
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Project description:The optimal ratio of omega-6 to omega-3 polyunsaturated fatty acids (PUFAs) is important for keeping homeostasis of biological processes and metabolism, yet the underlying biological mechanism is poorly understood. The objective of this study was to identify changes in the pig liver transcriptome induced by a diet enriched with omega-6 and omega-3 fatty acids, and to characterize the biological mechanisms related to PUFA metabolism. Polish Landrace pigs (n =12) were fed diet enriched with linoleic acid (LA, omega-6) and alpha-linolenic acid (ALA, omega-3 family) or standard diet as a control. The fatty acids profiling was assayed in order to verify how feeding influenced the fatty acids content in liver, and subsequently next-generation sequencing (NGS) was used to identify differentially expressed genes (DEG) between transcriptomes between dietary groups. The biological mechanisms and pathway interaction networks were identified by analysis in DAVID and Cytoscape tools. Fatty acids profile analysis indicated a higher contribution of PUFAs in liver for LA and ALA-enriched diet group, particularly for the omega-3 fatty acids family, but not omega-6. Next-generation sequencing identified 3,565 DEG, 1,484 of which were induced and 2,081 were suppressed by PUFA supplemenation. Low ratio of omega-6/-3 fatty acids resulted in modulation of fatty acids metabolism pathways and over-representation of genes involved in membrane composition, signal transduction and immune response pathways. In conclusion, a diet enriched with omega-6 and omega-3 fatty acids altered the transcriptomic profile of the pig liver and affected a set of genes involved in metabolic pathways important to animal health status. Hepatic mRNA profiles of Polish Landrace pig breed fed two different diets, were generated by deep sequencing, using Illumina MiSeq. Experimental diet was enriched with polyunsaturated fatty acids (omega-6 and omega-3), while standard diet remain as a cotrol. 2 pooled samples each containing RNA extracts from 6 individuals livers were analyzed.
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