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- W2893370907 abstract "Background: Immunotherapy is one promising therapeutic strategy against glioma, an aggressive form of brain cancer. Previous studies have demonstrated that multiple tumor antigens exist and can be used to induce tumor specific T cell responses. Furthermore, recently it was shown that TLR4-primed mesenchymal stem cells (MSCs), also known as MSC1, mostly elaborate pro-inflammatory mediators. Compared to MSCs, MSC-derived microvesicles (MVs) have advantageous properties that present them as stable, long lasting effectors with no risk of immune rejection. Therefore, peripheral blood monocyte derived dendritic cells (MoDCs) have been used to load tumor antigens and stimulate T cell mediated responses in the presence of MSC1-derived MVs in vitro. Methods: The B92 tumor cell line was heated to 43°C for 90 min prior to preparation of tumor cell lysates. MVs were purified by differential ultracentrifugation after isolation, stimulation of proliferation and treatment of MSCs. Autologous T cells isolated from non-adherent cells were harvested during the procedure to generate MoDCs and then incubated with heat stressed tumor cell lysate pulsed DCs in the presence of MSC1-derived MVs. T cells were then co-cultured with tumor cells in 96-well plates at a final volume of 200 μl CM at an effector: target ratio of 100:1 to determine their specific cytotoxic activity. Results: Flow cytometric analysis, T cell mediated cytotoxicity showed that heat stressed tumor antigen pulsed MoDCs and MSC1-derived MVs primed T cells elicited non-significantly enhanced cytotoxic activity toward B92 tumor cells (P≥0.05). Conclusion: These findings may offer new insights into tumor antigen presenting technology involving dendritic cells and MSC1-derived MVs. Further exploration of the potential of such nanoscale particles in immunotherapy and in novel cancer vaccine settings appears warranted." @default.
- W2893370907 created "2018-10-05" @default.
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- W2893370907 date "2018-07-27" @default.
- W2893370907 modified "2023-10-18" @default.
- W2893370907 title "Mesenchymal Stromal Stem Cell-Derived Microvesicles Enhance Tumor Lysate Pulsed Dendritic Cell StimulatedAutologous T lymphocyte Cytotoxicity" @default.
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- W2893370907 doi "https://doi.org/10.22034/apjcp.2018.19.7.1895" @default.
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