Adeno-associated virus variant capsids and methods of use thereof
Provided herein are variant adeno-associated virus (AAV) capsid proteins having one or more modifications in amino acid sequence relative to a parental AAV capsid protein, which, when present in an AAV virion, confer increased infectivity of one or more types of retinal cells as compared to the infectivity of the retinal cells by an AA V virion comprising the unmodified parental AAV capsid protein. Also provided are recombinant AAV virions and pharmaceutical compositions thereof comprising a variant AAV capsid protein as described herein, methods of making these rAAV capsid proteins and virions, and methods for using these rAAV capsid proteins and virions in research and in clinical practice, for example in, e.g., the delivery of nucleic acid sequences to one or more cells of the retina for the treatment of retinal disorders and diseases.
1. An infectious recombinant adeno-associated virus (rAAV) virion comprising a variant AAV capsid protein comprising the amino acid sequence set forth in SEQ ID NO: 42, and wherein the infectious rAAV virion confers an increased infectivity of a retinal cell compared to the infectivity of the retinal cells by an AAV virion comprising a capsid protein consisting of the amino acid of SEQ ID NO: 2.
2. An isolated nucleic acid comprising a nucleotide sequence that encodes a variant AAV capsid protein comprising the amino acid sequence set forth in SEQ ID NO: 42, and wherein the variant capsid protein, when present in an AAV virion, confers an increased infectivity of a retinal cell compared to the infectivity of the retinal cells by an AAV virion comprising a capsid protein consisting of the amino acid of SEQ ID NO: 2.
3. The rAAV virion according to claim 1 , further comprising a heterologous nucleic acid encoding one or more gene products, said one or more gene products operably linked to an expression control sequence.
4. The rAAV virion according to claim 3 , wherein the gene product is a protein or an interfering RNA.
5. The rAAV virion according to claim 4 , wherein the protein is a Rab escort protein-1 protein.
6. The rAAV virion according to claim 4 , wherein the protein is a retinitis pigmentosa GTPase regulator protein.
7. The rAAV virion according to claim 4 , wherein the protein inhibits the activity of vascular endothelial growth factor A (VEGF-A).
8. A pharmaceutical composition comprising the rAAV virion according to claim 5 and a pharmaceutically acceptable excipient.
9. A pharmaceutical composition comprising the rAAV virion according to claim 6 and a pharmaceutically acceptable excipient.
10. A pharmaceutical composition comprising the rAAV virion according to claim 7 and a pharmaceutically acceptable excipient.
11. A method for expressing one or more gene products in one or more retinal cells in a human or animal subject comprising intravitreally or subretinally administering to the human or animal subject the rAAV virion according to claim 3 , thereby expressing the one or more gene products in one or more retinal cells in the human or animal subject.
12. The method of claim 11 , wherein the retinal cell is selected from the group consisting of retinal ganglion cells, amacrine cells, horizontal cells, bipolar cells, photoreceptor cells, Müller glial cells, microglial cells and retinal pigment epithelium cells.
13. The method of claim 11 , wherein the rAAV virion is administered by intravitreal injection.
14. The rAAV virion according to claim 4 , wherein the interfering RNA reduces expression of VEGF-C.
15. A pharmaceutical composition comprising from 10 8 to 10 15 rAAV virions according to claim 14 and a pharmaceutically acceptable excipient.