Gene therapies for lysosomal disorders
The disclosure relates, in some aspects, to compositions and methods for treatment of diseases associated with aberrant lysosomal function, for example Parkinson's disease and Gaucher disease. In some embodiments, the disclosure provides expression constructs comprising a transgene encoding beta-Glucocerebrosidase (GBA) or a portion thereof, Lysosomal Membrane Protein 2 (LIMP2), Prosaposin, or any combination of the foregoing. In some embodiments, the disclosure provides methods of Parkinson's disease by administering such expression constructs to a subject in need thereof.
1. An isolated nucleic acid comprising
(i) an expression construct comprising a transgene comprising
(a) a beta-Glucocerebrosidase (Gcase) protein coding sequence comprising the sequence set forth in SEQ ID NO: 15; and
(b) a coding sequence encoding an inhibitory nucleic acid targeting α-Synuclein, wherein the inhibitory nucleic acid is encoded by the sequence set forth in SEQ ID NO: 20; and
(ii) two adeno-associated virus (AAV) inverted terminal repeats (ITR) sequences flanking the expression construct.
2. The isolated nucleic acid of claim 1 , wherein the transgene is operably linked to a promoter.
3. The isolated nucleic acid of claim 2 , wherein the promoter is a chicken beta actin (CBA) promoter.
4. The isolated nucleic acid of claim 2 , further comprising a CMV enhancer.
5. The isolated nucleic acid of claim 1 , further comprising a Woodchuck Hepatitis Virus Posttranscriptional Regulatory Element (WPRE).
6. The isolated nucleic acid of claim 1 , further comprising a Bovine Growth Hormone poly A signal tail.
7. The isolated nucleic acid of claim 1 , wherein each ITR sequence is a wild-type AAV2 ITR sequence.
8. The isolated nucleic acid of claim 1 , wherein each ITR sequence comprises a “D” region (SEQ ID NO: 27) that is proximal to the expression construct.
9. The isolated nucleic acid of claim 1 , wherein at least one of the ITR sequences comprises a “D” region (SEQ ID NO: 27) positioned on the outside of the ITR sequence relative to the expression construct.
10. The isolated nucleic acid of claim 1 , wherein the ITR sequence positioned 5′ relative to the expression construct comprises a “D” region (SEQ ID NO: 27) that is proximal to the expression construct, and the ITR sequence positioned 3′ relative to the expression construct comprises a “D” region (SEQ ID NO: 27) positioned on the outside of the ITR sequence relative to the expression construct.
11. The isolated nucleic acid of claim 1 , wherein the nucleic acid sequence of the 5′ ITR is nucleotides 1-145 of SEQ ID NO: 1 and the nucleic acid sequence of the 3′ ITR is nucleic nucleotides 3867-4011 of SEQ ID NO: 1.
12. The isolated nucleic acid of claim 11 , further comprising a TRY region between the 5′ ITR and the expression construct, wherein the TRY region has the sequence set forth in SEQ ID NO: 28.
13. The isolated nucleic acid claim 1 , wherein the transgene comprises the sequence set forth in nucleotides 1105-1367 of SEQ ID NO: 13.
14. A recombinant adeno-associated virus (rAAV) vector comprising
(i) an expression construct comprising a transgene comprising
(a) a Gcase protein coding sequence comprising the sequence set forth in SEQ ID NO: 15; and
(b) a coding sequence encoding an inhibitory nucleic acid targeting α-Synuclein, wherein the inhibitory nucleic acid is encoded by the sequence set forth in SEQ ID NO: 20; and
(ii) two AAV ITR sequences flanking the expression construct.
15. A plasmid comprising the rAAV vector of claim 14 .
16. The rAAV vector of claim 14 , wherein the promoter is a CBA promoter.
17. The rAAV vector of claim 16 , further comprising a CMV enhancer.
18. The rAAV vector of claim 14 , further comprising a WPRE.
19. The rAAV vector of claim 14 , further comprising a Bovine Growth Hormone poly A signal tail.
20. The rAAV vector of claim 14 , wherein each ITR sequence is a wild-type AAV2 ITR sequence.
21. The rAAV vector of claim 14 , wherein each ITR sequence comprises a “D” region (SEQ ID NO: 27) that is proximal to the expression construct.
22. The rAAV vector of claim 14 , wherein at least one of the ITR sequences comprises a “D” region (SEQ ID NO: 27) positioned on the outside of the ITR sequence relative to the expression construct.
23. The rAAV vector of claim 14 , wherein the ITR sequence positioned 5′ relative to the expression construct comprises a “D” region (SEQ ID NO: 27) that is proximal to the expression construct, and the ITR sequence positioned 3′ relative to the expression construct comprises a “D” region (SEQ ID NO: 27) positioned on the outside of the ITR sequence relative to the expression construct.
24. The rAAV vector of claim 14 , wherein the nucleic acid sequence of the 5′ ITR is nucleotides 1-145 of SEQ ID NO: 1 and the nucleic acid sequence of the 3′ ITR is nucleic nucleotides 3867-4011 of SEQ ID NO: 1.
25. The rAAV vector of claim 24 , further comprising a TRY region between the 5′ ITR and the expression construct, wherein the TRY region has the sequence set forth in SEQ ID NO: 28.
26. The rAAV vector of claim 14 , wherein the transgene comprises the sequence set forth in nucleotides 1105-1367 of SEQ ID NO: 13.
27. The rAAV vector of claim 14 , wherein the transgene is operably linked to a promoter.
28. A rAAV comprising:
(i) an AAV capsid protein; and
(ii) the rAAV vector of claim 27 .
29. The rAAV of claim 28 , wherein the AAV capsid protein is AAV9 capsid protein.
30. A method for treating a subject having Lewy Body Dementia associated with a GBA1 mutation, the method comprising administering to the subject the rAAV of claim 29 , wherein the administration comprises direct injection to the central nervous system (CNS) of the subject.
31. The method of claim 30 , wherein the direct injection is intracerebral injection, intraparenchymal injection, intrathecal injection, intra-cisterna magna injection or any combination thereof.
32. The method of claim 30 , wherein the direct injection to the CNS of the subject comprises convection enhanced delivery (CED).
33. A method of producing the rAAV of claim 28 , the method comprising:
(i) delivering to a cell a first vector encoding one or more AAV rep proteins and/or one or more AAV cap proteins, and the rAAV vector;
(ii) culturing the cells of (i) under conditions allowing for packaging the rAAV; and
(iii) harvesting the cultured host cells or the culture medium for collection of the rAAV.
34. A rAAV vector comprising a nucleic acid comprising, in 5′ to 3′ order:
(a) a 5′ AAV ITR;
(b) a CMV enhancer;
(c) a CBA promoter;
(d) a transgene comprising a Gcase protein coding sequence comprising the sequence set forth in SEQ ID NO: 15 and a coding sequence encoding an inhibitory nucleic acid targeting α-Synuclein, wherein the inhibitory nucleic acid is encoded by the sequence set forth in SEQ ID NO: 20;
(e) a WPRE;
(f) a Bovine Growth Hormone poly A signal tail; and
(g) a 3′ AAV ITR.
35. The rAAV vector of claim 34 , wherein the transgene comprises the sequence set forth in nucleotides 1105-1367 of SEQ ID NO: 13.
36. A rAAV comprising:
(i) an AAV capsid protein; and
(ii) the rAAV vector of claim 34 .
37. The rAAV of claim 36 , wherein the AAV capsid protein is AAV9 capsid protein.
38. A Baculovirus vector comprising (i) the sequence set forth in SEQ ID NO: 15, and (ii) a coding sequence encoding an inhibitory nucleic acid targeting α-Synuclein, wherein the inhibitory nucleic acid is encoded by the sequence set forth in SEQ ID NO: 20.
39. A cell comprising:
(i) a first vector encoding one or more AAV rep proteins and/or one or more AAV cap proteins; and
(il) a second vector comprising an expression construct comprising a Gcase protein coding sequence comprising the sequence set forth in SEQ ID NO: 15 and a coding sequence encoding an inhibitory nucleic acid targeting α-Synuclein, wherein the inhibitory nucleic acid is encoded by the sequence set forth in SEQ ID NO: 20.
40. The cell of claim 39 , wherein the first vector is a plasmid and the second vector is a plasmid.
41. The cell of claim 39 , wherein the cell is a mammalian cell.
42. The cell of claim 41 , wherein the mammalian cell is a HEK293 cell.
43. The cell of claim 39 , wherein the first vector is a Baculovirus vector and the second vector is a Baculovirus vector.
44. The cell of claim 43 , wherein the cell is an insect cell.