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Umbilical cord mesenchymal stem cell-conditioned media prevent muscle atrophy by suppressing muscle atrophy-related proteins and ROS generation Animal

Park, Chan-Mi, Kim, Mi Jin, Kim, Sun-Mi, Park, Jin-Ho, Kim, Z-Hun, Choi, Yong-Soo
In vitro cellular & developmental biology 2016 v.52 no.1 pp. 68-76
Western blotting, antioxidants, catalase, desmin, dexamethasone, disease models, dose response, glutathione, in vitro studies, muscles, muscular atrophy, reactive oxygen species, reverse transcriptase polymerase chain reaction, superoxide dismutase, therapeutics, umbilical cord
The therapeutic potential of mesenchymal stem cell-conditioned medium (MSC-CM) has been reported with various types of disease models. Here, we examine the therapeutic effect of umbilical cord MSC-CM (UCMSC-CM) on muscle-related disease, using a dexamethasone (Dex)-induced muscle atrophy in vitro model. The expressions of muscle atrophy-related proteins (MuRF-1 and MAFbx) and muscle-specific proteins (desmin and myogenin) were evaluated by Western blot analysis. The level of production of reactive oxygen species (ROS) was determined using a 2′,7′-dichlorofluorescein diacetate (DCFDA) dye assay. The expression of antioxidant enzymes (copper/zinc-superoxide dismutase (Cu/Zn-SOD), manganese superoxide dismutase (MnSOD), glutathione peroxidase-1 (GPx-1), and catalase (CAT)) was verified by reverse transcription polymerase chain reaction (RT-PCR). When L6 cells were exposed to Dex, the expression of muscle atrophy-related proteins was increased by 50–70%, and the expression of muscle-specific proteins was in turn decreased by 23–40%. Conversely, when the L6 cells were co-treated with UCMSC-CM and Dex, the expression of muscle atrophy-related proteins was reduced in a UCMSC-CM dose-dependent manner and the expression of muscle-specific proteins was restored to near-normal levels. Moreover, ROS generation was effectively suppressed and the expression of antioxidant enzymes was recovered to a normal degree. These data imply that UCMSC-CM clearly has the potential to prevent muscle atrophy. Thus, our present study offers fundamental data on the potential treatment of muscle-related disease using UCMSC-CM.