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Hematopoietic stem cell and gene therapy corrects primary neuropathology and behavior in Mucopolysaccharidosis IIIA mice

Citation

Langford-Smith, A and Wilkinson, FL and Langford-Smith, KJ and Holley, RJ and Sergijenko, A and Howe, SJ and Bennett, WR and Jones, SA and Wraith, JE and Merry, CLR and Wynn, RF and Bigger, BW, Hematopoietic stem cell and gene therapy corrects primary neuropathology and behavior in Mucopolysaccharidosis IIIA mice, Molecular Therapy, 20, (8) pp. 1610-1621. ISSN 1525-0016 (2012) [Refereed Article]


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Copyright Statement

Copyright 2012 The American Society of Gene & Cell Therapy

DOI: doi:10.1038/mt.2012.82

Abstract

Mucopolysaccharidosis IIIA (MPS IIIA or Sanfilippo disease) is a neurodegenerative disorder caused by a deficiency in the lysosomal enzyme sulfamidase (SGSH), catabolizing heparan sulfate (HS). Affected children present with severe behavioral abnormalities, sleep disturbances, and progressive neurodegeneration, leading to death in their second decade. MPS I, a similar neurodegenerative disease accumulating HS, is treated successfully with hematopoietic stem cell transplantation (HSCT) but this treatment is ineffectual for MPS IIIA. We compared HSCT in MPS IIIA mice using wild-type donor cells transduced ex vivo with lentiviral vector-expressing SGSH (LV-WT-HSCT) versus wild-type donor cell transplant (WT-HSCT) or lentiviral-SGSH transduced MPS IIIA cells (LV-IIIA-HSCT). LV-WT-HSCT results in 10% of normal brain enzyme activity, near normalization of brain HS and GM2 gangliosides, significant improvements in neuroinflammation and behavioral correction. Both WT-HSCT and LV-IIIA-HSCT mediated improvements in GM2 gangliosides and neuroinflammation but were less effective at reducing HS or in ameliorating abnormal HS sulfation and had no significant effect on behavior. This suggests that HS may have a more significant role in neuropathology than neuroinflammation or GM2 gangliosides. These data provide compelling evidence for the efficacy of gene therapy in conjunction with WT-HSCT for neurological correction of MPS IIIA where conventional transplant is ineffectual.

Item Details

Item Type:Refereed Article
Keywords:mucopolysaccharidosis, lentiviral, gene therapy, Sanfillipo syndrome
Research Division:Medical and Health Sciences
Research Group:Neurosciences
Research Field:Central Nervous System
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Inherited Diseases (incl. Gene Therapy)
Author:Bennett, WR (Dr Bill Bennett)
ID Code:79907
Year Published:2012
Web of Science® Times Cited:40
Deposited By:Menzies Institute for Medical Research
Deposited On:2012-10-11
Last Modified:2015-07-10
Downloads:0

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