Experts balk at large trial of stem cells for autism - SFARI
Early animal studies have shown that stem cells isolated from umbilical cord blood can stimulate cells in the spinal cord to regrow their myelin layers, and in doing so help restore connections with surrounding cells. Autism is thought to result from impaired connectivity in the brain. Because of this, some groups of children with the disorder may benefit from a stem cell transplant.
But others are skeptical of the approach. Autism is a complex disorder with many possible causes. Also, it’s unclear how stem cells derived from cord blood can improve connections in the brain. Given these important caveats, it’s too soon to conduct a test of this scale and investment, some experts say.
“It’s probably premature to run large trials without evidence that they have a therapeutic effect that [we] understand,” cautions Arnold Kriegstein, director of the Broad Center of Regenerative Medicine and Stem Cell Research at the University of California, San Francisco