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The application of non-thermal bio-compatible plasma (NBP) for stem cell differentiation is promising in tissue engineering. However, the differentiation efficiency of NBP treatment on various types of human tissue-derived stem cells and the underlying mechanisms is yet understood. This study is the first time to investigate the role of NBP in inducing differentiation and its potential molecular mechanism by using human bone marrow-derived stem cells (hBMSCs) and human periodontal ligament-derived stem cells (hPDLSCs). Our results showed that NBP promote osteogenic differentiation of hPDLSCs more effectively than hBMSCs under the same treatment condition, indicating a tissue-dependent manner of NBP interacts with stem cells. Furthermore, an increase of intracellular reactive oxygen species (ROS) production of hPDLSCs and antioxidant enzymes activation was observed after NBP treatment. Particularly, mitogen-activated protein kinases (MAPKs) level was also increased and in consistent with ROS level increase. Taken together, this study revealed that with NBP induction, hPDLSCs is a more suitable stem cell source than hBMSCs for bone regeneration and tissue engineering, and ROS-induced activation of MAPKs are possibly involved in the osteogenic differentiation process.

Non-Thermal Bio-Compatible Plasma Induces Osteogenic Differentiation of Human Mesenchymal Stem/Stromal Cells With ROS-Induced Activation of MAPK