Compositions and methods of treatment
The present disclosure provides infectious recombinant adeno-associated virus (rAAV) virions that comprise a variant capsid protein and a heterologous nucleic acid. The present disclosure further provides the variant adeno-associated virus (AAV) capsid proteins (and/or a nucleic acid encoding the variant AAV capsid proteins), which confer to an infectious rAAV virion an increased resistance to human AAV neutralizing antibodies. The present disclosure further provides host cells comprising an infectious rAAV virion and/or a nucleic acid encoding a subject variant AAV capsid protein. The present disclosure further provides methods of delivering a heterologous nucleic acid to a target cell where the target cell is contacted with a subject infectious rAAV virion. The present disclosure further provides methods of delivering a gene product to an individual, the methods generally involving administering an effective amount of a subject rAAV virion to an individual in need thereof.
1. A recombinant adeno-associated virus (rAAV) comprising:
(a) a variant capsid protein having an amino acid sequence comprising:
at least 95% amino acid sequence identity to amino acids 203-736 of the amino acid sequence set forth in SEQ ID NO:12, and
a Thr at amino acid 469 and an Ala at amino acid 598 based on the amino acid numbering set forth in SEQ ID NO:12; and
(b) a heterologous nucleic acid;
wherein the rAAV exhibits at least 5-fold greater resistance to human neutralizing antibodies compared to the resistance to the antibodies exhibited by AAV2.
2. The rAAV of claim 1 , wherein the amino acid sequence comprises at least 96% amino acid sequence identity to amino acids 203-736 of the amino acid sequence set forth in SEQ ID NO:12.
3. The rAAV of claim 1 , wherein the amino acid sequence comprises at least 97% amino acid sequence identity to amino acids 203-736 of the amino acid sequence set forth in SEQ ID NO:12.
4. The rAAV of claim 1 , wherein the amino acid sequence comprises at least 98% amino acid sequence identity to amino acids 203-736 of the amino acid sequence set forth in SEQ ID NO:12.
5. The rAAV of claim 1 , wherein the amino acid sequence comprises at least 99% amino acid sequence identity to amino acids 203-736 of the amino acid sequence set forth in SEQ ID NO:12.
6. The rAAV of claim 1 , wherein the rAAV exhibits at least 10-fold greater resistance to human neutralizing antibodies than the resistance exhibited by AAV2.
7. The rAAV of claim 1 , wherein the rAAV exhibits at least 15-fold greater resistance to human neutralizing antibodies than the resistance exhibited by AAV2.
8. The rAAV of claim 1 , wherein the rAAV exhibits at least 20-fold greater resistance to human neutralizing antibodies than the resistance exhibited by AAV2.
9. The rAAV of claim 1 , wherein the rAAV exhibits at least 25-fold greater resistance to human neutralizing antibodies than the resistance exhibited by AAV2.
10. The rAAV of claim 1 , wherein the rAAV exhibits at least 30-fold greater resistance to human neutralizing antibodies than the resistance exhibited by AAV2.
11. The rAAV of claim 1 , wherein the rAAV exhibits at least 35-fold greater resistance to human neutralizing antibodies than the resistance exhibited by AAV2.
12. The rAAV of claim 1 , wherein the rAAV exhibits increased transduction of mammalian cells in the presence of human neutralizing antibodies compared to the transduction of mammalian cells exhibited by wild type AAV serotype 2 (AAV2).
13. The rAAV of claim 12 , wherein the mammalian cells are liver cells, pancreatic cells, skeletal muscle cells, heart muscle cells, fibroblasts, retinal cells, synovial joint cells, lung cells, T cells, neurons, glial cells, stem cells, endothelial cells, or cancer cells.
14. The rAAV of claim 13 , wherein the stem cells are hematopoietic stem cells, hematopoietic progenitor cells, neural stem cells, neural progenitor cells, neural crest stem cells, embryonic stem cells, induced pluripotent stem cells (iPS cells), mesenchymal stem cells, mesodermal stem cells, liver stem cells, pancreatic stem cells, pancreatic progenitor cells, muscle stem cells, or retinal stem cells.
15. The rAAV of claim 1 , wherein the heterologous nucleic acid comprises an interfering RNA.
16. The rAAV of claim 1 , wherein the heterologous nucleic acid comprises a nucleotide sequence encoding a polypeptide.
17. A pharmaceutical composition comprising:
a) the rAAV virion according to claim 1 ; and
b) a pharmaceutically acceptable excipient.
18. The pharmaceutical composition of claim 17 , comprising from 10 6 to 10 15 rAAV virions.
19. An isolated nucleic acid comprising a nucleotide sequence that encodes the variant adeno-associated virus (AAV) capsid protein according to claim 1 .
20. An isolated host cell comprising the nucleic acid of claim 19 .