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- W4210272115 endingPage "114478" @default.
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- W4210272115 abstract "Pathogen inactivation (PI) is necessary for the pooled components derived from a biological source. Recently, the use of human platelet lysate (hPL) has increased in the cell manufacturing process as a xeno-free substitute for Fetal Bovine Serum (FBS). Therefore, an effective PI process to produce a pathogen-free hPL with the optimal efficiency in the manufacturing of cell therapy products is a vital requirement.To evaluate the efficacy of gamma irradiation and riboflavin/ultraviolet light (RB/UV) as PI methods for hPL, the reduction factor (RF) of titer of model viruses and bacteria were examined. Furthermore, the effect of different PI methods on the hPL performance was evaluated by the in vitro expansion of human placenta-derived mesenchymal stem cells (PLMSCs). To compare different study groups, the growth kinetic, immunophenotype, colony formation, and differentiation capacity (osteogenic and adipogenic) of PLMSCs were examined. In addition, the concentration of growth factors was assayed in each study group.Achievement to the RF more than 5 log10 for all pathogens, showed the effectiveness of two PI methods. In comparison with the other study groups, the dose of 45 kGy gamma irradiation considerably decreased the growth factor level of the hPL. It also showed a significant adverse effect on PLMSCs growth kinetics. The dose of 30 KGy gamma irradiation and RB/UV demonstrated a favorable effect on different assays of the in vitro expanded PLMSCs.The 30 KGy gamma irradiation and RB/UV were effective in the RF of the viral and bacterial models of the contaminated hPL. The efficacy of these PI-hPLs for PLMSCs expansion was preserved. To increase the safety of cell therapy products, PI methods should be considered for the hPL preparations." @default.
- W4210272115 created "2022-02-08" @default.
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- W4210272115 date "2022-04-01" @default.
- W4210272115 modified "2023-09-30" @default.
- W4210272115 title "A comparative study of pathogen inactivation technologies in human platelet lysate and its optimal efficiency in human placenta-derived stem cells culture" @default.
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- W4210272115 doi "https://doi.org/10.1016/j.jviromet.2022.114478" @default.
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