Journal: World Journal of Stem Cells
Article Title: Exosomes derived from microRNA-540-3p overexpressing mesenchymal stem cells promote immune tolerance via the CD74/nuclear factor-kappaB pathway in cardiac allograft
doi: 10.4252/wjsc.v16.i12.1022
Figure Lengend Snippet: Exosome-derived miR-540-3p alleviates immune resistance after heterotopic heart transplantation. A: Histopathological observation of the heart after heterotopic heart transplantation using hematoxylin and eosin staining; B: Detection and calculation of the difference in ejection fraction before and after heterotopic heart transplantation; C: Detection and calculation of differences in the percentage of fractional shortening before and after heterotopic heart transplantation; D-G: Enzyme-linked immunosorbent assay-based quantitative analysis of cytokine production (interleukin-1β, interferon-γ, interleukin-10, transforming growth factor β1) in serum; H: Expression of microRNA-540-3p in extracted dendritic cells (DCs); I: Expression of microRNA-540-3p in extracted T cells; J-M: Flow cytometric analysis of the positive rate of cell surface markers in DCs (major histocompatibility complex II, CD80, CD86, and CD274); N-P: Flow cytometric analysis of the positive rate of T cells (CD4 + T, CD8 + T, and T regulatory cells); Q-S: Western blot analysis of the expression of CD74 and nuclear factor-kappaB (NF-κB) in extracted DCs; T-V: Western blot analysis of CD74 and NF-κB expression in the extracted T cells; W: Co-IP was used to detect the binding of CD74 and NF-κB in extracted DCs; X: Co-IP was used to detect the binding of CD74 and NF-κB in extracted T cells. a P < 0.05, b P < 0.01, c P < 0.001, d P < 0.0001. BMSC: Bone marrow mesenchymal stem cell; IDO: Indoleamine 2,3-dioxygenase; DC: Dendritic cell; LPS: Lipopolysaccharide; NF-κB: Nuclear factor-kappaB; MHC: Major histocompatibility complex; IL: Interleukin; TGF: Transforming growth factor; IFN: Interferon.
Article Snippet: After blocking with 5% bovine serum albumin (Solarbio Co., Ltd, Beijing, China), the membrane was incubated overnight at 4 °C with anti-CD74 polyclonal antibody (1:1000 dilution; ThermoFisher PA5-22113), anti-NFκB p65 monoclonal antibody (1:200 dilution; ThermoFisher 436700), and anti-GAPDH monoclonal antibody (1:1000 dilution; Abmart M20006).
Techniques: Derivative Assay, Transplantation Assay, Staining, Enzyme-linked Immunosorbent Assay, Expressing, Immunopeptidomics, Western Blot, Co-Immunoprecipitation Assay, Binding Assay