“… 12 , 13 Two ERT-based treatments are human recombinant forms of α-galactosidase A (agalsidase), known as agalsidase-α (Replagal, Shire, Lexington, MA) and agalsidase-β (Fabrazyme, Sanofi-Genzyme, Cambridge, MA), which are each administered intravenously once every other week and provide beneficial effects toward slowing the progression of the disease. 14 , 15 , 16 , 17 While therapeutic value has been demonstrated through this approach, there are challenges associated with ERT and unmet medical needs still remain. Such challenges include variability of response, immunogenicity of the recombinant protein resulting in antibody generation (including neutralizing), infusion reactions, and difficulties inherent with cell-based manufacturing such as robust reproducibility of proper glycosylation patterns.…”