Delivery of therapeutic agents to the bone
This invention relates to compositions and methods of delivering therapeutic agents to bone. More specifically, the invention relates to endowing a large molecule vectors i.e., adeno virus, retrovirus, liposomes, micelles, natural and synthetic polymers, or combinations thereof, with the ability to target bone tissue in vivo and with improved stability in the blood, by attaching multiple copies of acid amino acid peptides. One preferred embodiment of the invention relates to endowing an adeno-associated virus (AAV) vector with the ability to target bone-tissue in vivo and improve its stability, by the addition of multiple acidic amino acid peptides attached to the capsid of the viral vector.
1. An insolated adeno-associated virus, comprising a capsid encoded by SEQ ID NO: 2, and capable of transfecting single stranded DNA into a mammalian cell.
2. The composition of claim 1 , further comprises a physiological composition suitable for administration to a subject in need.
3. The composition of claim 1 , wherein the adeno-associated virus comprises a single stranded DNA encoding N-acetylgalactosamine-6-sulfate-sulfatase, whereby the single stranded DNA expresses a physiologically active N-acetylgalactosamine-6-sulfate-sulfatase after transfection into a mammalian cell.
4. The composition of claim 3 , wherein the N-acetylgalactosamine-6-sulfate-sulfatase is wild type.
5. An insolated adeno-associated virus, comprising,
a) a capsid encoded by SEQ ID NO: 2;
b) single stranded DNA encoding wild type N-acetylgalactosamine-6-sulfate-sulfatase;
c) whereby the adeno-associated virus targets bone in vivo; and
d) whereby a physiologically active wild type N-acetylgalactosamine-6-sulfate-sulfatase is expressed after transfection of the adeno-associated virus into a mammalian cell.