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Expression profiles of microRNA in bovine raw milk exosome and supernatant without exosome [mRNA array]

ABSTRACT: We have reported that microRNAs are present in human, bovine, and rat milk whey. Milk whey miRNAs were resistant to acidic condition and to RNase. Thus, milk miRNAs were thought to be present packaged into membrane vesicles like exosome. However, body fluid miRNAs have been reported that there are in different forms. To clarify which miRNAs species are exist in exosome and which species are exist in another form, we used bovine raw milk and purified total RNA from exosome fraction and ultracentrifugated supernatant fraction, and analyzed by miRNA microarray.

ORGANISM(S): Bos taurus

PROVIDER: GSE61977 | GEO | 2015/03/09

SECONDARY ACCESSION(S): PRJNA262857

REPOSITORIES: GEO

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Expression profiles of microRNA in bovine raw milk exosome and supernatant without exosome [miRNA array]

Project description:We have reported that microRNAs are present in human, bovine, and rat milk whey. Milk whey miRNAs were resistant to acidic condition and to RNase. Thus, milk miRNAs were thought to be present packaged into membrane vesicles like exosome. However, body fluid miRNAs have been reported that there are in different forms. To clarify which miRNAs species are exist in exosome and which species are exist in another form, we used bovine raw milk and purified total RNA from exosome fraction and ultracentrifugated supernatant fraction, and analyzed by miRNA microarray.

2015-03-09 | GSE61976 | GEO

Time dependent expression profiles of microRNAs in rat milk

Project description:We have reported that microRNAs are present in human and bovine milk. But, it is unknown the roles of milk miRNAs. To clarify the roles of milk miRNAs, experimental animal such as rat study would be needed. However, it is unclear whether rat milk also contains miRNAs. Thus, we have employed microarray to show that rat milk also contains miRNAs.

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Heat-treatments affect protease activities and peptide profiles of ruminants’ milk

Project description:Proteases present in milk are heat-sensitive, and their activities increase or decrease depending on the intensity of the thermal treatment applied. The thermal effects on the protease activity are well-known for bovine milk but poorly understood for ovine and caprine milk. This study aimed to determine the nonspecific and specific protease activities in casein and whey fractions isolated from raw bovine, ovine and caprine milk collected in early lactation, and to determine the effects of low-temperature, long-time (63°C for 30 min) and high-temperature, short-time (85°C for 5 min) treatments on protease activities within each milk fraction.

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Analyzing the Function of Exosome’s microRNA in Milk by Comparing the Expression of microRNA in Milk and Exosome

Project description:Milk contains fats, carbohydrates, proteins, RNAs and enzymes, but also mRNA and microRNAs(miRNA), which plays an important role in neonatal innate and adaptive immunity. The following study investigates whether or not miRNA of exosome in milk is a vital pathway for miRNA of milk absorbing. Briefly, 280 pre-miRNAs and 326 mature miRNA were found. 37 exosomal miRNAs were upregulated (twice fold) compared to miRNAs found outside the exosomes. Among these miRNAs, ssc-miR-193a-3p’s expression was up regulated 1467.35 times, while ssc-miR-423-5p、ssc-miR-551a、ssc-miR-138、ssc-miR-1 and ssc-miR-124a were highly concentrated and upregulated from 13.58 to 30.06 times. Moreover, all of these miRNAs play essential roles in cell’s development and basic physiology processes in immune system. Following the analysis of target gene prediction and related signaling pathways, 9262 target genes showed to be mainly concentrated on three signaling pathway: metabolic pathways、pathways in cancer, and Phosphatidylinositol 3-kinase /Protein Kinase B(PI3K/Akt) signaling pathways. In addition, more than 20 miRNAs showed to be highly concentrated on exosomes, such as MECP2、GYS1、 LRRC8A、BCL9L、PHRF1 and ELOVL1, all closely related to immunity and engendering of gene. After performing in-depth research on miRNA’s localization, distribution and function related metabolism, we found that these exosome concentrated miRNA’s target genes were interrelated to development and basic cell functions, like metabolism and immunity. These results imply that miRNAs in breast milk can influence offspring via milk exosomes.

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Project description:Bovine mastitis milk whey sequencing

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Project description:Milk microRNAs (miRNAs) encapsulated in extracellular vesicles (EVs) are a novel class of bioactive food compounds. Milk produced by cows with subclinical mastitis threatens animals healthy and milk safety. However, little is known about the differentially expressed miRNA in milk-derived EVs related to subclinical mastitis. This study profiled miRNAs in milk-derived EVs from healthy cows and cows with subclinical mastitis. The potential targets for differentially expressed (DE) miRNAs were predicted. Milk-derived EVs were isolated from healthy cows (n = 7, the control group) and cows with subclinical (n = 7, the SM group). Two hundred ninety miRNAs (221 known and 69 novel ones) were identified. The top 20 miRNAs were commonly abundant (> 0.1% of the total read counts) in Healthy and SM groups, were regarded as abundant bovine milk-derived EVs miRNAs. MiR-21-5p was the most highly expressed known miRNA. Target genes of the top 20 abundant miRNAs were significantly enriched in Ras signaling pathway. The bta-miR-21-5p, bta-miR-30a-5p and miR-6-1096 were differentially expressed. For DE miRNAs, there was no significantly enriched pathways were found in the KEGG enrichment analysis. The linkage between the validated target genes and diseases suggested that we pay particular attention to exosome miRNAs from mastitic milk in milk safety.

2022-08-31 | GSE201588 | GEO

Effect of milk intake on circulating plasma miRNAs of adult humans

Project description:This study examines circulating plasma miRNAs of adult human subjects before and after bovine milk intake. We sought to confirm and expand findings previously reported by Baier, et al., J Nutr, 2014, PMID 25122645, using the same samples.

2016-04-06 | GSE79960 | GEO

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