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UCI study finds modified stem cells offer potential pathway to treat Alzheimer's disease
Date:4/15/2014

that over-expressed neprilysin. Most studies up to now have only looked into a single model, and there has been found to be variation in results between models.

These genetically modified stem cells were found to produce 25-times more neprilysin than control neural stem cells, but were otherwise equivalent to the control cells. The genetically modified and control stem cells were then transplanted into the hippocampus or subiculum of the mice brains two areas of the brain that are greatly affected by Alzheimer's disease. The mice transplanted with genetically modified stem cells were found to have a significant reduction in amyloid-beta plaques within their brains compared to the controls. The effect remained even one month after stem cell transplantation. This new approach could provide a significant advantage over unmodified neural stem cells because neprilysin-expressing cells could not only promote the growth of brain connections but could also target and reduce amyloid-beta pathology.

Before this can be investigated in humans, more work needs to be done to see if this affects the accumulation of soluble forms of amyloid-beta. Further investigation is also needed to determine whether this new approach improves cognition more than the transplantation of un-modified neural stem cells.

"Every mouse model of Alzheimer's disease is different and develops varying amounts, distribution, and types of amyloid-beta pathology," Blurton-Jones said. "By studying the same question in two independent transgenic models, we can increase our confidence that these results are meaningful and broadly applicable to Alzheimer's disease. But there is clearly a great deal more research needed to determine whether this kind of approach could eventually be translated to the clinic."


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Contact: Tom Vasich
tmvasich@uci.edu
949-824-6455
University of California - Irvine
Source:Eurekalert  

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