Abstract

The sequencing of the human genome has greatly facilitated our ability to identify the gene candidates that are critical for developmental regulation and disease progression. However, investigators seeking to use such data to gain a better understanding of the developmental biology and therapeutic potential of pluripotent stem cell types may be frustrated by the limitations of current genetic engineering techniques. Targeted genomic manipulation of mammalian cells is inefficient, and unintended effects of such manipulation on the cells’ developmental and proliferative potential remain uninvestigated. To this end, the recent demonstration of targeted gene correction in human induced pluripotent stem cells (hiPSCs) before and after reprogramming, as reported in this issue of Molecular Therapy, warrants special mention.1

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