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Objective: The present study was designed to investigate the cytoprotective effects of ginsenoside Rg1 (GS-Rg1) against malondialdehyde (MDA)-suppressed proliferation of the mesenchymal stem cells (MSCs) and its possible mechanisms in vitro.    Methods: Murine bone marrow-derived MSCs were treated with GS-Rg1 (10, 50, 100[Formula: see text]mg/L) for 24[Formula: see text]h before being incubated with MDA in vitro, CFU-Fassay, the cell viability and BrdU incorporation assay were examined, the expression of cyclin-dependent kinase 2 (CDK2), p21 and cyclin E of MSC were examined by Q-RT-PCR and Western blotting.    Results: The results showed that the number and size of murine bone marrow MSC colonies, the number of colony-forming cells, methyl thiazolyltetrazolium (MTT) absorbed value greatly and percentage of BrdU-positive cells increased significantly in MSC pretreated with GS-Rg1. GS-Rgl pretreatment markedly decreased the expression level of p21 and increased the expression of CDK2 and cyclin E. GS-Rg1 protects MSCs from MDA-suppressed proliferation.    Conclusion: The protective mechanism could be related to its ability to increase the expression of CDK2 and cyclin E, and to reduce the expression of p21.

Protective effect and mechanisms of ginsenoside Rg1 against MDA-suppressed proliferation in mesenchymal stem cells derived from murine bone marrow