The present invention, provides a method of treating cognitive impairment of Hunter syndrome. Among other things, the present invention provides a method comprising a step of administering intrathecally to a subject in need of treatment a recombinant iduronate-2-sulfatase (I2S) enzyme at a therapeutically effective dose and an administration interval for a treatment period sufficient to improve, stabilize or reduce declining of one or more cognitive, adaptive, motor, and/or executive functions relative to a control

Provided herein are fusion proteins that comprise an enzyme replacement therapy enzyme and an Fc region, as well as methods of using such proteins to treat a lysosomal storage disorder. Methods for transporting agents across the blood-brain barrier are also provided herein.

Provided herein are fusion proteins that comprise an enzyme replacement therapy enzyme and an Fc region, as well as methods of using such proteins to treat a lysosomal storage disorder. Methods for transporting agents across the blood-brain barrier are also provided herein.

Provided are fusion proteins between p97 (melanotransferrin) and iduronate-2-sulfatase (IDS), and related compositions and methods of use thereof, for instance, to facilitate delivery of IDS across the blood-brain barrier (BBB) and/or improve its tissue penetration in CNS and/or peripheral tissues, and thereby treat and/or diagnose Hunter Syndrome (Mucopolysaccharidosis type II; MPS II) and related lysosomal storage disorders, including those having a central nervous system (CNS) component.

The present invention provides, among other things, compositions and methods for CNS delivery of Idursulfase-beta, a human recombinant iduronate-2-sulfatase protein, for effective treatment of Hunter Syndrome. The compositions and methods provided by the present invention effectively reduce symptoms not only in brain and spinal cord but also in peripheral tissues including heart, liver, spleen, lung, and kidney.

A co-therapeutic regimen comprising AAV9-mediated intrathecal/intracisternal and/or systemic delivery of an expression cassette containing a hIDS gene and two or more immunosuppressants is provided herein. Also provided are methods and kits containing these vectors and compositions useful for treating Hunter syndrome and the symptoms associated with Hunter syndrome.

Described herein are methods and compositions for treating MPS I (Hurler) disease.

Nucleases and methods of using these nucleases for inserting a sequence encoding a therapeutic protein such as an enzyme into a cell, thereby providing proteins or cell therapeutics for treatment and/or prevention of a lysosomal storage disease.

Provided is a conjugate in which an immunoglobulin Fc region is linked to an iduronate-2-sulfatase enzyme through a non-peptide polymer linker moiety. Further, provided are a conjugate, a method for preparing the same, and a composition including the same in which a non-peptide polymer linker moiety is specifically linked to an immunoglobulin Fc.

The present invention relates to a fusion protein between a therapeutic enzyme and an immunoglobulin Fc region, a method thereof, and a composition comprising the fusion protein.