I've never heard of this type of stem cell, but they sound promising.
Stem cells used to reverse paralysis in animals
January 28, 2009 - A new study has found that transplantation of stem cells from the lining of the spinal cord, called ependymal stem cells, reverses paralysis associated with spinal cord injuries in laboratory tests. The findings show that the population of these cells after spinal cord injury was many times greater than comparable cells from healthy animal subjects. The results open a new window on spinal cord regenerative strategies. The study is published in the journal Stem Cells.
The transplanted cells were found to proliferate after spinal cord injury and were recruited by the specific injured area. When these cells were transplanted into animals with spinal cord injury, they regenerated ten times faster while in the transplant subject than similar cells derived from healthy control animals.
Spinal cord injury is a major cause of paralysis, and the associated trauma destroys numerous cell types, including the neurons that carry messages between the brain and the rest of the body. In many spinal injuries, the cord is not actually severed, and at least some of the signal-carrying nerve cells remain intact. However, the surviving nerve cells may no longer carry messages because oligodendrocytes, which comprise the insulating sheath of the spinal cord, are lost.
The regenerative mechanism discovered was activated when a lesion formed in the injured area. After a lesion formed in the transplant subject, the stem cells were found to have a more effective ability to differentiate into oligodendrocytes and other cell types needed to restore neuronal function.
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