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Expression profiles of microRNA in bovine raw milk exosome and supernatant without exosome [miRNA 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: GSE61976 | GEO | 2015/03/09

SECONDARY ACCESSION(S): PRJNA262856

REPOSITORIES: GEO

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Expression profiles of microRNA in bovine raw milk exosome and supernatant without exosome [mRNA 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 | GSE61977 | 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

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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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