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Gene expression comparison of microRNA-181d Transgenic and microRNA-181d Knock-in thymocytes

ABSTRACT: T cell-specific over-expression of microRNA-181d reduced number of immature CD4+CD8+ thymocytes.

ORGANISM(S): Mus musculus

PROVIDER: GSE50113 | GEO | 2014/02/20

SECONDARY ACCESSION(S): PRJNA217048

REPOSITORIES: GEO

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Gene expression comparison of microRNA-181d Transgenic and microRNA-181d Knock-in thymocytes

Project description:T cell-specific over-expression of microRNA-181d reduced number of immature CD4+CD8+ thymocytes. Whole thymus tissues were isolated from the miR-181d transgenic (Tg-8) and miR-181d knockin (KI) mice, followed by total RNA isolation.

2014-02-20 | E-GEOD-50113 | biostudies-arrayexpress

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Project description:Objective: To investigate the effects of stretch-induced periodontal ligament cell (PDLC) exosomes on osteoblast differentiation, and to explore their regulatory role in mechanical force-related periodontal tissue remodeling.Design: After applying 20% stretch loading to human periodontal ligament cells, exosomes were extracted from the supernatant and co-cultured with osteoblasts to detect their effects on osteogenic differentiation. Meanwhile, the exosomes were sequenced by high-throughput microRNA sequencing for bioinformatic analysis and validation to explore exosome signaling pathways through miRNAs.Results: Stretch-induced PDLC exosomes could be taken up by osteoblasts and promoted osteogenic differentiation of osteoblasts, as demonstrated by the increased expression levels of osteogenesis-related factors and enhanced ALP staining. In the miRNA profile of differentially expressed PDLC exosomes under stretch loading, miRNA-181d-5p was up-regulated significantly. The expression levels of osteogenesis-related factors and ALP staining were also increased in osteoblasts transfected with miR-181d-5p, and this effect might be related to the inhibitory role of exosomal miR-181d-5p on tumor necrosis factor (TNF).Conclusions: Stretch-induced PDLC exosomes exhibited a promoting effect on osteogenic differentiation, which might result from the inhibition of TNF via exosomal miR-181d-5p.

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