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.
Project description:In order to investigate the molecular mechanisms underlying the further enhancement of Atorvastatin pretreated MSC-derived exosomes (MSCATV-Exo) in cardiac protection, we performed lncRNA sequencing on exosomes secreted from ATV pretreated MSCs and non treated MSCs to identify differentially expressed lncRNA. We found that 450 lncRNAs were identified to be upregulated and 1332 lncRNAs downregulated (over 1.5 fold change) in MSCATV-Exo compared to MSC-Exo.
Project description:Mesenchymal stem cell (MSC)-derived exosomes had been reported to be a prospective candidate in accelerating diabetic wound healing. Hence, this study intended to explore whether exosomes originating from the human umbilical cord MSC (hucMSC) could display a superior proangiogenic effect on diabetic wound repair and its underlying molecular mechanism.
Project description:Human mesenchymal stem cell (MSC)-conditioned medium (CM) was previously reported to affect the biology of tumor cells; however, the precise mechanisms remain unclear. Here, we show that MSCs secreted 40- to 100-nm particles, which have the typical characteristics of exosomes, and these MSC-derived exosomes promoted migration of the breast cancer cell line MCF7. To further investigate the effect of MSC-exosomes on MCF7, we analyzed the gene expression profiles of MCF7 treated with or without MSC-exosomes for 24 h. Investigation of whole genome gene expression level changes in breast cancer cell line MCF7 which were treated with or without mesenchymal stem cell-derived exosomes. This study uses total RNA recovered from two samples. One sample is MCF7 treated with PBS for 24 hours and another one is MCF7 treated with mesenchymal stem cell-derived exosomes for 24hours. The ultimate concentration of mesenchymal stem cell-derived exosomes used in this experiment was 400ng/ul.
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.
Project description:Studies have shown that stimulation of Mesenchymal stem cells (MSCs) with biophysical or biochemical cues could influence the contents and biological activities of subsequent MSC-derived exosomes. However, the underlying mechanisms have not been fully clarified. Here, we pretreated MSCs with lipopolysaccharide (LPS) and evaluated exosomes (LPS-Exo) therapeutic effects in sepsis. Analysis of exosomes activity revealed that LPS-Exo treatment improved sepsis to a greater extent than normal MSCs-derived exosomes (Exo). Further analysis revealed that LPS-Exo exert their protective effects mainly through RNA contents. Thus, we hypothesized that LPS preconditioning enhances the therapeutic efficacy of LPS-Exo in sepsis by altering miRNA expression profile.
Project description:Deciphering the regulatory network for human naïve and primed pluripotency is of fundamental theoretical and applicable significance. Here, by combining quantitative proteomics, phosphoproteomics and acetylproteomics analyses, we revealed RNA processing and translation as the most differentially-regulated processes between naïve and primed human embryonic stem cells (hESCs). While glycolytic primed hESCs rely predominantly on eIF4E-mediated cap-dependent pathway for protein translation, naïve hESCs with reduced mTORC1 activity are more tolerant to blockage of eIF4E-dependent translation, and their bivalent metabolism allows for translating selective mRNAs via both eIF4E-dependent and eIF4E-independent/eIF4A2-dependent pathways to form a more compact naïve proteome. Globally up-regulated proteostasis system and down-regulated post-translational modification system help to further refine and maintain the naïve proteome that is compatible with the more rapid cycling of naïve hESCs, where CDK1 plays an indispensable coordinative role.
Project description:Human mesenchymal stem cell (MSC)-conditioned medium (CM) was previously reported to affect the biology of tumor cells; however, the precise mechanisms remain unclear. Here, we show that MSCs secreted 40- to 100-nm particles, which have the typical characteristics of exosomes, and these MSC-derived exosomes promoted migration of the breast cancer cell line MCF7. To further investigate the effect of MSC-exosomes on MCF7, we analyzed the gene expression profiles of MCF7 treated with or without MSC-exosomes for 24 h.