Abstract
Temporal changes in mRNAs for metallothionein (MT) isoforms in subcultures of rat marrow mesenchymal stem cells (MSCs) after treatment with dexamethasone were investigated. Both MT-1 and MT-2 mRNA expression in the cultured MSCs with dexamethasone showed maximum levels at d 1, whereas ALP and osteocalcin mRNAs peaked at d 12. MT-3 mRNA was not detected in the cultured MSCs at any time. The expression level of MT-2 mRNA at d 1 was 9.4-fold higher than that of MT-1 mRNA. Finally, osteoblast differentiation and mineralization of MSCs at d 14 was inhibited by the addition of a common antisense oligonucleotide for both MT-1 and MT-2 in the culture medium during the first 4 d. The results suggest that the large amounts of MT-2 are produced in the early stage of subculture of MSCs, and this might regulate their differentiation.
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Dohi, Y., Shimaoka, H., Ikeuchi, M. et al. Role of metallothionein isoforms in bone formation processes in rat marrow mesenchymal stem cells in culture. Biol Trace Elem Res 104, 57–69 (2005). https://doi.org/10.1385/BTER:104:1:057
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DOI: https://doi.org/10.1385/BTER:104:1:057