Intrathecal delivery of nucleic acid sequences encoding abcd1 for treatment of adrenomyeloneuropathy

Abstract

Methods of the invention encompass delivery of nucleic acid sequences encoding ABCD1 for the treatment of X-linked Adrenoleukodystrophy (X-ALD), e.g., for Adrenomyeloneuropathy (AMN).

What is claimed is: 
     
         1 . A method of increasing adeno-associated virus 9 (AAV9) vector titers in transfected producer cells grown in culture, said method comprising the steps of:
 i) incubating a nucleic acid sequence that is complementary to an mRNA encoding ATP binding cassette subfamily D member 1 (ABCD1) with the cells, and   ii) transfecting an AAV9 vector comprising a nucleotide sequence encoding ABCD1 into the cells (AAV9-ABCD1 vector), wherein the amount of ABCD1 mRNA expressed from the AAV9 vector is decreased, thereby increasing AAV9-ABCD1 vector yield in cell lysate and/or media by about 1 fold to about 50 fold compared to a reference standard.   
     
     
         2 . The method of  claim 1 , wherein the nucleic acid sequence that is complementary to an mRNA encoding ABCD1 is an interfering RNA. 
     
     
         3 . The method of  claim 2 , wherein the wherein the interfering RNA is an shRNA or siRNA. 
     
     
         4 . The method of  claim 3 , wherein the siRNA comprises SEQ ID NO. 4, SEQ ID NO. 5, SEQ ID NO. 6, SEQ ID NO. 7, or a combination thereof 
     
     
         5 . The method of  claim 1 , wherein the reference standard comprises AAV9-ABCD1 vector yield in cell lysate and/or media from producer cells that were not incubated with a nucleic acid sequence that is complementary to an mRNA encoding ABCD1. 
     
     
         6 . A method of treating X-linked adrenoleukodystrophy (X-ALD) in a subject in need thereof comprising administering to the subject a composition comprising purified AAV9-ABCD1 vector obtained from the producer cells of  claim 1 . 
     
     
         7 . The method of  claim 6 , wherein the composition comprising purified AAV9-ABCD1 vector is administered to the subject by intrathecal administration. 
     
     
         8 . A method of treating X-linked adrenoleukodystrophy (X-ALD) in a subject in need thereof comprising administering to the subject an adeno-associated virus (AAV) vector encoding an ATP binding cassette subfamily D member 1 (ABCD1), wherein said vector is administered to the subject by intrathecal administration. 
     
     
         9 . The method of  claim 8 , wherein the intrathecal administration is mediated by an osmotic pump. 
     
     
         10 . The method of  claim 8 , wherein the dose of vector is about 1×10 13 GC to about 10×10 13 GC. 
     
     
         11 . The method of  claim 8 , wherein the AAV is AAV9. 
     
     
         12 . A method of providing ATP binding cassette subfamily D member 1 (ABCD1) to a subject having X-linked adrenoleukodystrophy (X-ALD) comprising administering to the subject a vector encoding ABCD1, wherein said vector is administered to the subject by intrathecal administration, and wherein ABCD1 expression from said vector in the central nervous system is less than ABCD1 expression from said vector in peripheral organs. 
     
     
         13 . The method of  claim 12 , wherein ABCD1 expression from said vector in the central nervous system is about 3 fold higher than expression of ABCD1 in the central nervous system of an untreated subject that does not have X-ALD. 
     
     
         14 . The method of  claim 13 , wherein the ABCD1 expression from said vector in peripheral organs is about 90% less than expression of ABCD1 in the peripheral organs of an untreated subject that does not have X-ALD.