Synthetic adeno-associated virus inverted terminal repeats
View Patent ↗This invention relates to synthetic adeno-associated virus (AAV) inverted terminal repeats (ITRs) that exhibit altered activities compared to a naturally occurring AAV ITR and methods of using the same for delivery of nucleic acids to a cell or a subject. The synthetic ITRs provide a larger packaging capacity and the ability to manipulate activities such as transduction efficiency, cellular response to transduction, and transcription.
1. A polynucleotide comprising at least one synthetic adeno-associated virus (AAV) inverted terminal repeat (ITR), wherein said ITR comprises:
(a) an AAV rep binding element;
(b) an AAV terminal resolution sequence; and
(c) an AAV rep binding element′ (RBE′);
wherein said ITR does not comprise any other AAV ITR sequences of 6 or more contiguous nucleotides.
2. The polynucleotide of claim 1 , wherein (a), (b), and (c) are from AAV2 and said ITR does not comprise any other AAV2 ITR sequences.
3. The polynucleotide of claim 1 , wherein said ITR further comprises non-AAV cis elements.
4. The polynucleotide of claim 1 , wherein the nucleotide sequence of one or more transcription factor binding sites in said ITR is deleted and/or substituted.
5. The polynucleotide of claim 1 , wherein said ITR is enhanced for intra- or inter-molecular homologous recombination compared to a naturally occurring AAV ITR.
6. The polynucleotide of claim 1 , wherein said ITR exhibits increased host chromosome integration of transduced vector genomes compared to a naturally occurring AAV ITR.
7. The polynucleotide of claim 1 , wherein said ITR exhibits decreased host chromosome integration of transduced vector genomes compared to a naturally occurring AAV ITR.
8. The polynucleotide of claim 1 , wherein one or more CpG motifs in said ITR are deleted and/or substituted.
9. The polynucleotide of claim 1 , further comprising a heterologous nucleic acid.
10. A viral vector comprising the polynucleotide of claim 1 .
11. The viral vector of claim 10 , which is an AAV vector.
12. A recombinant AAV particle comprising the polynucleotide of claim 1 .
13. A method of producing a recombinant AAV particle, comprising providing to a cell permissive for AAV replication:
(a) a recombinant AAV template comprising (i) a heterologous nucleic acid, and (ii) the synthetic ITR of claim 1 ;
(b) a polynucleotide comprising Rep coding sequences and Cap coding sequences;
under conditions sufficient for the replication and packaging of the recombinant AAV template;
whereby recombinant AAV particles are produced in the cell.
14. The method of claim 13 , wherein the Rep coding sequences and Cap coding sequences cannot be packaged into the recombinant AAV particles.
15. A method of delivering a nucleic acid to a cell, comprising introducing into a cell the recombinant AAV particle of claim 12 .
16. The method of claim 15 , wherein the cell is selected from the group consisting of a neural cell, lung cell, retinal cell, epithelial cell, smooth muscle cell, skeletal muscle cell, cardiac muscle cell, pancreatic cell, hepatic cell, kidney cell, myocardial cell, bone cell, spleen cell, keratinocyte, fibroblast, endothelial cell, prostate cell, germ cell, progenitor cell, stem cell, cancer cell, and tumor cell.
17. A method of administering a nucleic acid to a mammalian subject comprising administering to the mammalian subject a cell that has been contacted with the recombinant AAV particle of claim 12 under conditions sufficient for the AAV particle vector genome to enter the cell.
18. A method of administering a nucleic acid to a mammalian subject comprising administering to the mammalian subject the recombinant AAV particle of claim 12 .