This is the second story in a few days about iPS cells -- Induced Pluripotent Stem Cells. They have been in the news in recent years as a way around using human embryonic stem cells.
This first story we posted was about a study saying the iPS cells were dying faster when compared to stems cells derived from embryos.
This new study reports that iPS cells are not nearly as predictable as human embryonic stem cells are.
These two stories underscore intrinsic and important differences between iPS and human embryonic stem cells; they do not mean that the iPS challenges cannot be overcome. But they do remind us that good science is difficult and slow but must be done in order to develop the best therapies possible.
Rob
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