Journal
STEM CELLS
Volume 24, Issue 12, Pages 2868-2876Publisher
WILEY
DOI: 10.1634/stemcells.2005-0636
Keywords
adult bone marrow stem cells; transdifferentiation; pluripotent stem cells; neural differentiation; multipotential differentiation; mesenchymal stem cells
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Recent results have shown the ability of bone marrow cells to migrate in the brain and to acquire neuronal or glial characteristics. In vitro, bone marrow- derived MSCs can be induced by chemical compounds to express markers of these lineages. In an effort to set up a mouse model of such differentiation, we addressed the neuronal potentiality of mouse MSCs (mMSCs) that we recently purified. These cells expressed nestin, a specific marker of neural progenitors. Under differentiating conditions, mMSCs display a distinct neuronal shape and express neuronal markers NF-L ((eurofilament-light, or neurofilament 70 kDa) and class III beta-tubulin. Moreover, differentiated mMSCs acquire neuronlike functions characterized by a cytosolic calcium rise in response to various specific neuronal activators. Finally, we further demonstrated for the first time that clonal mMSCs and their progeny are competent to differentiate along the neuronal pathway, demonstrating that these bone marrow- derived stem cells share characteristics of widely multipotent stem cells unrestricted to mesenchymal differentiation pathways.
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