Therapeutic uses of genome editing with CRISPR/Cas systems
Disclosed herein are methods, compositions, and kits for high efficiency, site-specific genomic editing of cells for treating or preventing genetic blood disorders.
1. A method for altering a target sickle cell disease (SCD)-associated polynucleotide sequence in a cell comprising contacting the SCD-associated polynucleotide sequence with a clustered regularly interspaced short palindromic repeats-associated (Cas) protein and from one to two ribonucleic acids, wherein the ribonucleic acids direct Cas protein to and hybridize to a target motif of the target SCD-associated polynucleotide sequence comprising nucleotides located between position 5246806 and position 5248263 of human chromosome 11, wherein the target SCD-associated polynucleotide sequence is cleaved, and wherein the efficiency of alteration is from about 50% to about 80%.
2. A method according to claim 1 , wherein the Cas protein is Streptococcus pyogenes Cas9 protein or a functional portion thereof selected from the group consisting of a DNA binding domain, at least one RNA binding domain, a helicase domain, and an endonuclease domain.
3. A method according to claim 1 , wherein the Cas protein is Cas9 protein from any bacterial species or functional portion thereof selected from the group consisting of a DNA binding domain, at least one RNA binding domain, a helicase domain, and an endonuclease domain.
4. A method according to claim 1 , wherein the Cas protein is complexed with the one to two ribonucleic acids.
5. A method according to claim 1 , wherein the target motif is G(N) 19 NGG or (N) 20 NGG.
6. A method according to claim 1 , wherein the alteration results in reduced expression of the target polynucleotide sequence, a knock out of the target polynucleotide sequence, or correction of the target polynucleotide sequence from an undesired sequence to a desired sequence.
7. A method according to claim 1 , wherein the cell is selected from the group consisting of a peripheral blood cell, a stem cell, a pluripotent cell, a hematopoietic stem cell, a CD34+cell, a CD34+ mobilized peripheral blood cell, a CD34+ cord blood cell, a CD34+ bone marrow cell, a CD34 + CD38-Lineage-CD90 + CD45RA − cell, a primary human cell, a non-transformed human cell, and combinations thereof.
8. A method according to claim 1 , wherein one or two ribonucleic acids hybridize to a target motif that contains at least one mismatch when compared with all other genomic nucleotide sequences in the cell.
9. A method according to claim 1 , wherein the Cas protein is encoded by a modified nucleic acid selected from the group consisting of pseudouridine, 5-methylcytodine, 2-thio-uridine, 5-methyluridine-5′-triphosphate, 4-thiouridine-5′-triphosphate, 5,6-dihydrouridine-5′-triphosphate, and 5-azauridine-5′-triphosphate.
10. A method according to claim 1 , wherein at least one of the ribonucleic acids is a modified ribonucleic acid comprising one to two modified nucleotides selected from the group consisting of pseudouridine, 5-methylcytodine, 2-thio-uridine, 5-methyluridine-5′-triphosphate, 4-thiouridine-5′-triphosphate, 5,6-dihydrouridine-5′-triphosphate, and 5-azauridine-5′-triphosphate.
11. A method according to claim 1 , wherein the cell was selected for Cas protein expression.