Enhancement of human mesenchymal stem cell differentiation by combination treatment with 5-azacytidine and trichostatin A

Biotechnology Letters
Hye-Joung KimYoo-Jin Kim

Abstract

To enhance the differentiation of mesenchymal stem cells (MSCs) and their epigenetic status by modification using hypomethylating agents (HMAs) and histone deacetylase inhibitors (HDACs). Treatment with 5-azacytidine or 5-azacytidine plus trichostatin A (TSA) increased expression of Runx-2, BDNF and Sox-9 compared with the control or TSA groups. Maximal increases of 4.1-, 4.5-, and 8.3-fold in Runx-2, BDNF, and Sox-9 transcript levels, respectively, were observed in the 5-azacytidine plus TSA group. Similar to the expression pattern of key regulatory molecules, differentiation to each lineage was also enhanced considerably in the 5-azacytidine or in the 5-azacytidine plus TSA groups. Quantitative analyses at the protein level showed 8.9-, 26.8-, 27.9-, and 28.5-fold upregulation of osterix, MAP-2, nestin, and type II collagen), respectively. HMAs and HDACs enhanced in vitro differentiation of MSCs, which was maximized when the two drugs were combined, with HMA having the dominant effect.

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