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- W2608038868 abstract "Mesenchymal stromal cells (MSCs) are used as experimental immunotherapy. Extensive culture expansion is necessary to obtain clinically relevant cell numbers, although the impact on MSCs stability and function is unclear. This study investigated the effects of long-term in vitro expansion on the stability and function of MSCs.Human bone marrow-derived (bmMSCs) and umbilical cord-derived (ucMSCs) MSCs were in vitro expanded. During expansion, their proliferative capacity was examined. At passages 4, 8 and 12, analyses were performed to investigate the ploidy, metabolic stability, telomere length and immunophenotype. In addition, their potential to suppress lymphocyte proliferation and susceptibility to natural killer cell lysis was examined.BmMSCs and ucMSCs showed decreasing proliferative capacity over time, while their telomere lengths and mitochondrial activity remained stable. Percentage of aneuploidy in cultures was unchanged after expansion. Furthermore, expression of MSC markers and markers associated with stress or aging remained unchanged. Reduced capacity to suppress CD4 and CD8 T-cell proliferation was observed for passage 8 and 12 bmMSCs and ucMSCs. Finally, susceptibility of bmMSCs and ucMSCs to NK-cell lysis remained stable.We showed that after long-term expansion, phenotype of bmMSCs and ucMSCs remains stable and cells exhibit similar immunogenic properties compared with lower passage cells. However, immunosuppressive properties of MSCs are reduced. These findings reveal the consequences of application of higher passage MSCs in the clinic, which will help increase the yield of therapeutic MSCs but may interfere with their efficacy." @default.
- W2608038868 created "2017-05-05" @default.
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- W2608038868 date "2017-07-01" @default.
- W2608038868 modified "2023-09-29" @default.
- W2608038868 title "Aging of bone marrow– and umbilical cord–derived mesenchymal stromal cells during expansion" @default.
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- W2608038868 doi "https://doi.org/10.1016/j.jcyt.2017.03.071" @default.
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