Summary
Adult stem cells from skeletal muscle cells were induced to differentiate into cardiocytes to see if stem cells from another different but histologically-comparable tissues can differentiate to the target cells. Skeletal muscles-derived stem cells (MDSCs) were isolated from adult skeleton muscle tissues by differential adhesion, and immunocytochemically identified by using Sca-1. In order to induce the proliferation but not differentiation of MDSCs, the cells were cultured in Dulbecco’s modified Eagle’s medium/F12 (DMEM/F12) supplemented with 1:50 B27, 20 ng/mL basic fibroblast growth factor (bFGF), 20 ng/mL epidermal growth factor (EGF) in a suspension for 6 days. Then these stem cells were treated with 5 μmol/L 5-azacytidine for 24 h in an adherence culture. The characteristics of induced cells were examined by immunocytochemistry, quantitative real time RT-PCR and morphological observation of cell phenotype. Our results showed that the appearance of some cells gradually changed from spindle-shape into polygonal or short-column-shape. Some of these post-treated cells could contract spontaneously and rhythmically. The expression of GATA-4 and cTnT was increased 1 and 2 week(s) after the treatment. And about 16.6% of post-treated cells were cTnT-positive. Therefore, we are led to conclude that skeletal muscle-derived stem cells could differentiate into cardiocyte-like cells, which exhibited some characteristics of cardiocytes.
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This study was supported by a grant from the National Natural Sciences Foundation of China (No. 30872627) and Hubei Provincial Natural Sciences Foundation (No. 2007ABA133).
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Li, J., Fu, D., Hong, G. et al. Skeletal muscle-derived stem cells exhibit cardiocyte competences. J. Huazhong Univ. Sci. Technol. [Med. Sci.] 29, 741–744 (2009). https://doi.org/10.1007/s11596-009-0614-2
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DOI: https://doi.org/10.1007/s11596-009-0614-2