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Blood flow-restricted resistance exercise (BFRE) alters the surface profile, miRNA cargo and functional impact of circulating extracellular vesicles

ABSTRACT: In this study, we provide evidence that ischemic exercise, conducted as blood flow-restricted resistance exercise, promote changes in the micro-RNA cargo of circulating extracellular vesicles in healthy volunteers.

ORGANISM(S): Homo sapiens

PROVIDER: GSE136997 | GEO | 2020/04/12

REPOSITORIES: GEO

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Blood flow-restricted resistance exercise (BFRE) alters the surface profile, miRNA cargo and functional impact of circulating extracellular vesicles

Project description:Blood flow-restricted resistance exercise (BFRE) alters the surface profile, miRNA cargo and functional impact of circulating extracellular vesicles

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Blood flow-restricted resistance exercise alters the surface profile, miRNA cargo and functional impact of circulating extracellular vesicles.

Project description:Ischemic exercise conducted as low-load blood flow restricted resistance exercise (BFRE) can lead to muscle remodelling and promote muscle growth, possibly through activation of muscle precursor cells. Cell activation can be triggered by blood borne extracellular vesicles (EVs) as these nano-sized particles are involved in long distance signalling. In this study, EVs isolated from plasma of healthy human subjects performing a single bout of BFRE were investigated for their change in EV surface profiles and miRNA cargos as well as their impact on skeletal muscle precursor cell proliferation. We found that after BFRE, five EV surface markers and 12 miRNAs were significantly altered. Furthermore, target prediction and functional enrichment analysis of the miRNAs revealed several target genes that are associated to biological pathways involved in skeletal muscle protein turnover. Interestingly, EVs from BFRE plasma increased the proliferation of muscle precursor cells. In addition, alterations in surface markers and miRNAs indicated that the combination of exercise and ischemic conditioning during BFRE can stimulate blood cells to release EVs. These results support that BFRE promotes EV release to engage in muscle remodelling and/or growth processes.

| S-EPMC7125173 | biostudies-literature

BAG6KO impacts extracellular vesicle mRNA cargo

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Circadian rhythm does not affect the miRNA cargo of bovine raw milk extracellular vesicles

Project description:Extracellular vesicles (EVs) and their microRNA (miRNA) cargo have been suggested as potential biomarkers for mammary gland health in cattle. However, milk is a dynamic fluid, and its biologically active components, including miRNAs, could be subject to changes throughout the day. The current study aimed to evaluate the circadian fluctuation of milk EVs miRNA cargo to assess the feasibility of milk EVs as future biomarkers for mammary gland health management. Milk from four healthy dairy cows was collected manually from one quarter during four consecutive days in the two daily milking sessions in the morning and the afternoon. The SCC was determined, and the milk EVs were isolated from skimmed milk. The presence of EVs was confirmed by transmission electron microscopy (TEM), tunable resistive pulse sensing (TRPS), and western blot (WB). Small RNA libraries were produced from 10 ng of extracted RNA and sequenced in two lanes of a HiSeq2500. The heterogeneity and integrity of EVs and the protein EV markers CD9, CD81, and TSG101 were confirmed by TEM and WB. The sequencing revealed that despite daily fluctuation in other milk components, like the somatic cells during milking sessions, the miRNA cargo abundance in milk EVs stayed constant. Our results show that the miRNA cargo of milk EVs is very stable regardless of the hour of the day, supporting their potential use as diagnostic markers for mammary gland health.

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Multi-Omic Integrated networks connect DNA methylation and miRNA with skeletal muscle plasticity to chronic exercise in type 2 diabetic obesity [Methylation data]

Project description:Analysis of skeletal muscle DNA methylation from type 2 diabetic volunteers before and after 16 weeks of chronic exercise training (two groups, one undergoing aerobic excercise and the other resistance training exercise)

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Multi-Omic Integrated networks connect DNA methylation and miRNA with skeletal muscle plasticity to chronic exercise in type 2 diabetic obesity [miRNA data]

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Attenuated inflammatory profile following single and repeated handgrip exercise and remote ischemic preconditioning in patients with cerebral small vessel disease

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Time and Exercise effects on Human Skeletal Muscle

Project description:Four healthy human volunteers underwent an acute bout of resistance exercise with the right leg at 2 pm. Biopsies were removed from the Vastus Lateralis muscle 6 h (8 pm) and 18 h (8 am) after exericise Keywords = Human skeletal muscle Keywords = resistance exerise Keywords = diurnal Keywords = circadian Keywords: time-course

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