More disconcerting news about teen sex and abortion in China.
Researchers from the University of South Florida have found that human stem cells (I'm not seeing what was the source of this cells though Sandberg's web page notes research using stem cell from umbilical cord blood and blood stem cells) were used to treat primates with Parkinson's.
That NIH-funded study showed that only a small number of stem cells turned into dopamine-producing cells - not enough to improve the primates' function by replacing missing neurons. Instead, some stem cells turned into astrocytes, a supportive brain cell that produces neuron-nourishing chemicals. The researchers also identified in the brains of the primate recipients a significant amount of dopamine-producing neurons that were not derived from stem cells. The results suggest that stem cells may actually trigger the brain's own self-repair mechanisms by pumping out molecules that boost nerve survival and blood vessel development and decrease neural degeneration.