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Abstract
A new type of mesenchymal stem cells (MSCs) that expresses stage-specific embryonic antigen 3 (SSEA-3) and the mesenchymal cell marker CD105 are known as multilineage-differentiating stress-enduring (Muse) cells. Studies have shown that stem cells in suspension cultures are more likely to generate embryoid body-like stem cell spheres and maintain an undifferentiated phenotype and pluripotency. We separated Muse cells derived from human dermal fibroblasts by long-term trypsin incubation (LTT) through suspension cultures in methylcellulose. The Muse cells obtained expressed several pluripotency markers, including Nanog, Oct4, Sox2, and SSEA-3, and could differentiate in vitro into cells of the three germ layers, such as hepatocytes (endodermal), neural cells (ectodermal) and adipocytes, and osteocytes (mesodermal cells). These cells showed a low level of DNA methylation and a high nucleo-cytoplasmic ratio. Our study provides an innovative and exciting platform for exploring the potential cell-based therapy of various human diseases using Muse cells as well as their great possibility for regenerative medicine.
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