| Autor: |
Laoharawee K; 1 Center for Genome Engineering, Department of Genetics Cell Biology and Development, University of Minnesota , Minneapolis., Podetz-Pedersen KM; 1 Center for Genome Engineering, Department of Genetics Cell Biology and Development, University of Minnesota , Minneapolis., Nguyen TT; 1 Center for Genome Engineering, Department of Genetics Cell Biology and Development, University of Minnesota , Minneapolis., Evenstar LB; 1 Center for Genome Engineering, Department of Genetics Cell Biology and Development, University of Minnesota , Minneapolis., Kitto KF; 2 Department of Neuroscience and College of Pharmacy, University of Minnesota , Minneapolis., Nan Z; 3 Department of Neurosurgery, University of Minnesota , Minneapolis., Fairbanks CA; 2 Department of Neuroscience and College of Pharmacy, University of Minnesota , Minneapolis., Low WC; 3 Department of Neurosurgery, University of Minnesota , Minneapolis., Kozarsky KF; 4 REGENXBIO, Inc. , Rockville, Maryland., McIvor RS; 1 Center for Genome Engineering, Department of Genetics Cell Biology and Development, University of Minnesota , Minneapolis. |
| Abstrakt: |
Mucopolysaccharidosis type II (MPS II; Hunter syndrome) is a rare X-linked recessive lysosomal disorder caused by defective iduronate-2-sulfatase (IDS), resulting in accumulation of heparan sulfate and dermatan sulfate glycosaminoglycans (GAGs). Enzyme replacement is the only Food and Drug Administration-approved therapy available for MPS II, but it is expensive and does not improve neurologic outcomes in MPS II patients. This study evaluated the effectiveness of adeno-associated virus (AAV) vector encoding human IDS delivered intracerebroventricularly in a murine model of MPS II. Supraphysiological levels of IDS were observed in the circulation (160-fold higher than wild type) for at least 28 weeks post injection and in most tested peripheral organs (up to 270-fold) at 10 months post injection. In contrast, only low levels of IDS were observed (7-40% of wild type) in all areas of the brain. Sustained IDS expression had a profound effect on normalization of GAG in all tested tissues and on prevention of hepatomegaly. Additionally, sustained IDS expression in the central nervous system (CNS) had a prominent effect in preventing neurocognitive deficit in MPS II mice treated at 2 months of age. This study demonstrates that CNS-directed, AAV9 mediated gene transfer is a potentially effective treatment for Hunter syndrome, as well as other monogenic disorders with neurologic involvement. |
