Homo sapiens strain:Exosomes | isolate:MSC-exos
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ABSTRACT:
PROVIDER: PRJNA1033407 | ENA |
REPOSITORIES: ENA
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Project description:Conventional treatments for inflammatory bowel disease (IBD) have multiple potential side effects. Therefore, alternative treatments are desperately needed. In the present study, we proposed a new therapeutic tool for the treatment of IBD in murine pre-clinical models by using MSC-Exos. We demonstrated that the infused MSC-Exos are immunotolerated by the host, which is convenient for a future clinical application of MSC-Exos in IBD. To understand the molecular basis mediating the anticolitic benefit of MSC-Exos, we performed proteomic analysis using iTRAQ technology to detect the protein expression profiles in MSC-Exos and the corresponding supernatants from their parent cell MSCs. Proteomic analysis revealed that MSC-Exos were enriched in proteins involved in regulating multiple biological processes associated with the anti-colitic benefit of MSC-Exos. Particularly, metallothionein-2 in MSC-Exos was required for the suppression of inflammatory responses in macrophages. Taken together, MSC-Exos are critical regulators of inflammatory responses and may be promising candidates for IBD treatment.
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Project description:In order to investigate the specific mechanisms underlying the cardioprotective effects of Tongxinluo pretreated MSC-derived exosomes (MSCTXL-Exo) in cardiac repair, we performed microRNA sequencing on exosomes secreted from Tongxinluo pretreated MSCs and non-treated MSCs to identify differentially expressed miRNA. We found that 18 miRNAs were identified to be upregulated and 25 miRNAs downregulated (over 2-fold change) in MSCTXL-Exo compared to MSC-Exo.
2022-06-01 | GSE184067 | GEO
Project description:Unprogrammed macrophage polarization, is associated with diabetic wound ulcers. Nevertheless, development of corresponding drugs is still a challenge. Here, exosomes are isolated from naive bone marrow-derived macrophages (BMDMs) (M0-Exos), inflammatory BMDMs (M1-Exos), and anti-inflammatory BMDMs (M2-Exos), with the aim of pinpointing the exosomes functionality and identify global miRNAs expression profiles.
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Project description:Rationale：Poor peri-implant osseointegration of dental implants in patients with type II diabetes has become a major clinical challenge in recent years. MSC (Mesenchymal stem cell)-derived exosomes may play an important role in peri-implant osseointegration, but the mechanism remains unclear. Enhancing the therapeutic effect of MSC-derived exosomes and exploring the potential mechanism can help provide a new therapeutic strategy to improve the clinical outcome of dental implant restorations in patients with type II diabetes. Methods：The exosomes derived from hypoxia (Hypo-exos) or normoxia (Nor-exos) preconditioned bone marrow mesenchymal stem cells (BMSCs) were co-cultured with BMSCs and human umbilical vein endothelial cells (HUVECs). The effect of exosomes on BMSCs cell proliferation was detected by CCK-8 assay and EdU assay, and the effect on angiogenesis ability of HUVECs was detected by wound healing assay, transwell migration assay, tube formation assay, enzyme-linked immunosorbent assay (ELISA), quantitative real-time polymerase chain reaction (qRT-PCR) and western blot. A diabetic rat dental implant model was also established and the effect of exosomes on implant osseointegration was evaluated through micro-CT scanning and histological analysis. The differentially expressed miRNAs between Hypo-exos and Nor-exos were identified by high-throughput miRNA sequencing. Subsequently, the target genes and their roles in regulating angiogenesis were predicted and analyzed by bioinformatics analysis and dual luciferase reporter assay. Results：In vitro experiments indicated that hypoxia preconditioning could elevate exosome production and promote cell proliferation of BMSCs and angiogenesis of HUVECs. Moreover, Hypo-exos promoted peri-implant osteogenesis in rats with diabetes. Further investigation revealed the vital involvement of the miR-106b-5p/HIF-1α axis in promoting peri-implant osseointegration. Conclusion: Exosomes derived from hypoxia-preconditioned BMSCs could improve the peri-implant osseointegration in rats with diabetes by promoting cell proliferation and angiogenesis, and the miR-106b-5p/ HIF-1α axis could be the underlying mechanism.
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Project description:We hypothesized that miRNAs in the bone maroow mesenchymal stem cells (BM-MSC)-derived exosomes contributed to the phenotype change of breast cancer cells through exosome transfer. We analyzed the miRNA expression signature in BM-MSC-derived exosomes. We compared the miRNA expression levels in exosomes between BM-MSCs and adult fibroblasts (as a control). In this study, miRNA expression including in bone-marrow mesenchymal cell (BM-MSC)-derived exosomes was examined, and compared with that of exosomes derived from adult fibroblast cells or the BM-MSC cells. In addition, miRNA expression of BM-MSC exosomes was also compared with that of breast cancer cells with or without cancer stem cell marker.
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