The present invention relates to methods and materials useful for systemically delivering polynucleotides across the
blood brain barrier using adeno-associated
virus as a vector. For example, the present invention relates to methods and materials useful for systemically delivering α-N-acetylglucosamidinase polynucleotides to the central and
peripheral nervous systems, as well as the somatic
system. Use of these methods and materials is indicated, for example, for treatment of the lysosomal storage disorder
mucopolysaccharidosis IIIB. As another example, the present invention relates to methods and materials useful for systemically delivering N-sulphoglucosamine sulfphohydrolase polynucleotides to the central and
peripheral nervous systems, as well as the somatic
system. Use of this second type of methods and materials is indicated, for example, for treatment of the lysosomal storage disorder
mucopolysaccharidosis IIIA.