Abstract
Nestin-expressing stem cells of the hair follicle, discovered by our laboratory, have been shown to be able to form neurons and other nonfollicle cell types. We have shown that the nestin-expressing stem cells from the hair follicle can effect the repair of peripheral nerve and spinal cord injury. The hair follicle stem cells differentiate into neuronal and glial cells after transplantation to the injured peripheral nerve and spinal cord, and enhance injury repair and locomotor recovery. We have termed these cells hair follicle-accessible pluripotent (HAP) stem cells. When the excised hair follicle with its nerve stump was placed in Gelfoam 3D histoculture, HAP stem cells grew and extended the hair follicle nerve which consisted of βIII-tubulin-positive fibers with F-actin expression at the tip. These findings indicate that βIII-tubulin-positive fibers elongating from the whisker follicle sensory nerve stump were growing axons. The growing whisker sensory nerve was highly enriched in HAP stem cells, which appeared to play a major role in its elongation and interaction with other nerves in 3D Gelfoam histoculture, including the sciatic nerve, the trigeminal nerve, and the trigeminal nerve ganglion. Our results suggest that a maj...Continue Reading
Citations
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