Development of the new cell therapy for a neurologic and muscular disorder : considering the possibility of the cell source of the periodontal membrane

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The muscle and nerve cells(neurons) were isolated from rat periodontal ligament cells. The muscle cells were confirmed by patch-clamp method, their action potential were similar to the skeletal muscle cells or the cardiac muscle. In immunostaining, there are positive cells for the skeletal muscle marker, toroponin T ; or the myocardial marker, toroponin I ; or the smooth muscle marker,α-smooth muscle action. In the evaluation of bone differentiation potential, the formation of calcification nodule were formed in the fibroblast from primary culture of periodontal ligament. But almost none of such calcification was observed in muscle cells and neurons.