Methods Mol Biol

The CRISPR/Cas9 system can be exploited to disrupt genes or cis-regulatory elements in the genome of human hematopoietic stem cells. Here, we describe a protocol to deliver the CRISPR/Cas9 ribonucleoprotein complexes into primary human hematopoietic stem cells and to evaluate the engraftment and multilineage differentiation of edited cells in immunodeficient mice. This procedure allows the editing of a high proportion of long-term repopulating hematopoietic stem cells.