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http://dx.doi.org/10.5352/JLS.2018.28.9.1042

Extracts from Gracilaria vermiculophylla Prevent Cellular Senescence and Improve Differentiation Potential in Replicatively Senescent Human Bone Marrow Mesenchymal Stem Cells  

Jeong, Sin-Gu (Department of Biology, College of Natural Science, Chosun University)
Cho, Tae Oh (Department of Biology, College of Natural Science, Chosun University)
Cho, Goang-Won (Department of Biology, College of Natural Science, Chosun University)
Publication Information
Journal of Life Science / v.28, no.9, 2018 , pp. 1042-1047 More about this Journal
Abstract
The red algae Gracilaria vermiculophylla is widespread on seashores worldwide and has been used as food in Asian countries. Previous studies have reported that extracts of Gracilaria red algae have beneficial anti-oxidant and anti-inflammatory effects. The present study examined the anti-senescence effects of Gracilaria vermiculophylla extracts (GV-Ex) in replicatively senescent human bone marrow mesenchymal stem cells (hBM-MSCs). GV-Ex pretreatment improved the cellular viability of hBM-MSCs that had been injured by oxidative stress. These effects of GV-Ex were confirmed by MTT assay and immunoblot analysis using the apoptotic proteins p53 and cleaved caspase-3. The reactive oxygen species (ROS) levels were examined in long-term cultured Passages 17 (P-17) mesenchymal stem cells (MSC) and compared to P-7 MSC. The ROS accumulation was greater in the P-17 than in the P-7. However, these increased ROS levels in the P-17 were decreased significantly after treatment with GV-Ex, and restoration of the levels of the anti-oxidant enzymes SOD1, SOD2, and CAT was also observed under these conditions. In addition, P-17 hBM-MSC treated with GV-Ex had decreased levels of the senescence proteins p53, p21, and p16. The results show that the ability of P-17 hBM-MSC to differentiate into osteocytes and adipocytes was improved by GV-Ex treatment, suggesting that GV-Ex ameliorates the functional decline of senescent stem cells.
Keywords
Anti-oxidant; Gracilaria vermiculophylla; mesenchymal stem cells; reactive oxygen species; replicative senescence;
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