Ontology highlight
ABSTRACT:
PROVIDER: PRJNA1205516 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR31872105_1.fastq.gz | Fastqsanger.gz | |||
| SRR31872105_2.fastq.gz | Fastqsanger.gz | |||
| SRR31872106_1.fastq.gz | Fastqsanger.gz | |||
| SRR31872106_2.fastq.gz | Fastqsanger.gz | |||
| SRR31872107_1.fastq.gz | Fastqsanger.gz |
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Project description:Feed regimens have a pivotal role in modulating the transcriptional programs that, in turns, have an impact on many biological processes, including metabolism, health and development. Green feed diet in ruminant exerts a beneficial effect on rumen metabolism and enhances the content of health-promoting biomolecules in the milk. However, a comprehensive analysis focused to the identification of genes, and therefore, biological processes modulated by the green feed diet in buffalo rumen has never been reported so far. In this regard, to highlight the impact of the green feed diet on ruminal transcriptomic profiles, we performed RNA-sequencing in buffaloes fed a total mixed ratio (TMR) + the inclusion of 30% of ryegrass green feed (treated group) in comparison with buffaloes fed a dry TMR diet (control group).
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Project description:A healthy rumen is crucial for normal growth and improved production performance of ruminant animals. Rumen microbes participate in and regulate rumen epithelial function, and the diverse metabolites produced by rumen microbes are important participants in rumen microbe-host interactions. SCFAs, as metabolites of rumen microbes, have been widely studied, and propionate and butyrate have been proven to promote rumen epithelial cell proliferation. Succinate, as an intermediate metabolite in the citric acid cycle, is a final product in the metabolism of certain rumen microbes, and is also an intermediate product in the microbial synthesis pathway of propionate. However, its effect on rumen microbes and rumen epithelial function has not been studied. It is unclear whether succinate can stimulate rumen epithelial development. Therefore, in this experiment, Chinese Tan sheep were used as experimental animals to conduct a comprehensive analysis of the rumen microbiota community structure and rumen epithelial transcriptome, to explore the role of adding succinate to the diet in the interaction between the rumen microbiota and host.
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Project description:Synthesis of milk fat is a complex biochemical process regulated by a series of molecular events. To determine gene expression changes during milk fat synthesis in bovine mammary epithelial cells, we established a cell model with a high capacity for milk fat synthesis using stimulation with acetate and β-hydroxybutyrate. RNA sequencing was used to identify differentially expressed genes (DEGs) between the high-milk-fat and control cells. A total of 625 DEGs (358 upregulated, 267 downregulated) were identified. Among the highly expressed genes, there was enrichment for terms associated with fatty acid synthesis, activation, and triacylglycerol synthesis, consistent with active milk fat synthesis. Kyoto Encyclopedia of Genes and Genomes analysis suggested that DEGs were most enriched in the “lipid metabolism” subcategory of the “metabolism” category, and in the “signal transduction” subcategory of the “environmental information processing” category. Although an in vitro cell model cannot completely simulate in vivo lactation, it eliminates interference from other cell types and from the synthesis of other milk components during transcriptome profile analysis. This work provides a profile of gene expression changes that occur during milk fat synthesis in bovine mammary epithelial cells, which furthers our understanding of the molecular regulation of lipid metabolism.
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Project description:In this study, we investigated the molecular regulatory mechanisms of milk protein production in dairy cows by studying the miRNAomes of five key metabolic tissues involved in protein synthesis and metabolism from dairy cows fed high- and low-quality diets. In total, 340, 338, 337, 330, and 328 miRNAs were expressed in the rumen, duodenum, jejunum, liver, and mammary gland tissues, respectively. Some miRNAs were highly correlated with feed and nitrogen efficiency, with target genes involved in transportation and phosphorylation of amino acid (AA). Additionally, low-quality forage diets (corn stover and rice straw) influenced the expression of feed and nitrogen efficiency-associated miRNAs such as miR-99b in rumen, miR-2336 in duodenum, miR-652 in jejunum, miR-1 in liver, and miR-181a in mammary gland. Ruminal miR-21-3p and liver miR-2285f were predicted to regulate AA transportation by targeting ATP1A2 and SLC7A8, respectively. Furthermore, bovine-specific miRNAs regulated the proliferation and morphology of rumen epithelium, as well as the metabolism of liver lipids and branched-chain AAs, revealing bovine-specific mechanisms. Our results suggest that miRNAs expressed in these five tissues play roles in regulating transportation of AA for downstream milk production, which is an important mechanism that may be associated with low milk protein under lowquality forage feed.
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Project description:As the unique organ, rumen plays vital roles in providing products for humans, however, the underlying cell composition and interactions with epithelium-attached microbes remain largely unknown. Herein, we performed an integrated analysis in single-cell transcriptome, epithelial microbiome, and metabolome of rumen tissues to explore the differences of microbiota-host crosstalk between newborn and adult cattle models. We found that fewer epithelial cell subtypes and more abundant immune cells (e.g., Th17 cells) in the rumen tissue of adult cattle. Metabolism-related functions and oxidation-reduction process were significantly upregulated in the adult rumen epithelial cell subtypes. The epithelial Desulfovibrio was significantly enriched in the adult cattle. To further clarify the role of Desulfovibrio in host’s oxidation-reduction process, we performed metabolomics analysis of rumen tissues and found that Desulfovibrio showed a high co-occurrence probability with the pyridoxal in the adult cattle compared with newborn ones. The adult rumen epithelial cell subtypes also showed stronger ability of pyridoxal binding. These indicates that Desulfovibrio and pyridoxal likely play important roles in maintaining redox balance in adult rumen. The integrated analysis provides novel insights into the understanding of rumen function and facilitate the future precision improvement of rumen function and milk/meat production in cattle.
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Project description:In comparison with cow milk, goat (Capra hircus) milk contains much higher levels of unsaturated fatty acids, as well as higher levels of total fat, proteins, carbohydrates, calcium, and vitamins.The main objective of the present study was to better define the relationship of known miRNAs regulating milk fat metabolism. Our main purpose is to search for some known miRNAs regulating milk fat metabolism, to this end, we screened potential miRNAs with differential expression between peak-lactation and non-lactation. qPCR gene expression profiling. Monocytes from three healthy goats (3 year old) of similar body weight. We screened a series of potential miRNAs involved in regulation of milk metabolism.
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