Delivery methods and compositions for nuclease-mediated genome engineering in hematopoietic stem cells
The present disclosure is in the field of genome engineering, particularly targeted modification of the genome of a hematopoietic cell.
1. A method for targeted integration into purified hematopoietic stem cells (HSC) and/or progenitor cells (PC), the method comprising the following steps:
(a) stimulating the cells;
(b) delivering a non-integrating lentiviral (IDLV) donor nucleic acid to the cells one day after stimulation;
(c) culturing the cells obtained by step (b) for one day; and
(d) delivering at least one zinc finger nuclease to the cells obtained by step (c) such that the donor nucleic acid is integrated into the genome, wherein the at least one zinc finger nuclease is delivered in mRNA form.
2. The method of claim 1 , further comprising treating the HSC and/or PC cells with an aryl Hydrocarbon Receptor Antagonist.
3. The method according to claim 1 , wherein the method comprises delivering at least one zinc finger nuclease by electroporation.
4. The method according to claim 1 , wherein the donor nucleic acid is an exogenous sequence.
5. The method according to claim 1 , wherein the nuclease comprises a pair of ZFNs.
6. The method according to claim 1 , wherein the HSC and/or PC cells are selected from the group comprising CD34+ cells, CD34+CD133+ cells, CD34+CD133− cells, CD34+CD133+CD90+ cells, or a combination thereof.
7. The method according to claim 1 , wherein the IDLV vector comprises an exogenous sequence flanked by regions of homology to an endogenous locus and the mRNA is delivered by electroporation.
8. The method according to claim 7 , wherein the exogenous sequence is integrated into an endogenous safe harbor locus or downstream of the regulatory regions of an endogenous gene, such that expression of the exogenous sequence is driven by the endogenous regulatory regions.
9. The method according to claim 7 , wherein the HSC and/or PC cells are selected from the group comprising CD34+ cells, CD34+CD133+ cells, CD 34+CD133− cells and CD34+CD133+CD90+ cells, or combination thereof.
10. The method of claim 1 , further comprising the steps of:
(e) culturing the cells of step (d), and
(f) isolating the cultured cells of step (e).
11. The method of claim 10 , further comprising formulating the isolated cultured cells of step (f) into a pharmaceutical composition and administering the pharmaceutical composition to a subject.