Abstract
AbstractOur capacities to understand and manipulate mammalian genomes are accelerating at an astounding pace. In 2007, Capecchi, Evans, and Smithies were awarded the Nobel Prize in medicine for their work on gene targeting, which showed that embryonic stem cells could be modified by homologous recombination (HR) with engineered template DNA to alter virtually any gene and create mutant mice. This work revolutionized biology by allowing investigators to study the in vivo consequences of selected gene alteration. However, the efficiency of HR in embryonic stem cells is unpredictable, depending on the target gene and HR template. More importantly, spontaneous HR occurs at very low rates in most somatic cells, restricting the use of standard gene targeting for most laboratory and clinical applications. This limitation is being overcome by genome-editing technologies, which markedly enhance the capacity to alter cellular genes with laser-like precision. Four review articles in this edition of Blood summarize the field of genome editing, focusing on its potential for treating hematological disorders.
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