International Stem Cell Corporation have claimed positive results from its pre-clinical study using stem cells in the treatment of Parkinson's Disease. The primary goal of the study was to demonstrate the benefits of neuronal cells derived from human stem cells. The neuronal cells were derived from human parthenogenetic stem cells, which are not obtained via reproduction. They can become neurons when they are implanted in to the brain.
The study was carried out for
12 weeks on rats who did not actually have Parkinson's Disease. The rats were
instead given 6-OHDA (6-Hydroxydopamine), which is a toxin used to kill
dopaminergic neurons (the cells involved in Parkinson's Disease). The actual
results for the study have not been disclosed. It has only been stated that
"signs of improvement in rotational behavior of these animals were clearly
observed. 
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