Behavioral consequences of bone marrow transplantation in the treatment of murine mucopolysaccharidosis type VII

Laila Bastedo, Mark S. Sands, David T. Lambert, Michele A. Pisa, Edward Birkenmeier, Patricia L. Chang

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46 Scopus citations


The gus(mps)/gus(mps) mouse is a model of the human lysosomal storage disease mucopolysaccharidosis type VII caused by deficient β-glucuronidase activity. Bone marrow transplantation has been shown to correct some of their biochemical and pathological abnormalities but its efficacy in correcting their neurological functional deficits is unknown. We transplanted the neonatal gus(mps)/gus(mps) mice and their normal controls and evaluated their central nervous system function with two behavioral tests: the grooming test, a developmentally regulated and genetically based activity, and a Morris water maze test which assessed spatial learning abilities. The two transplanted groups groomed less than the normals, were unable to remember the location of an invisible platform from day to day, and were severely impaired at developing strategies to locate the platform in unfamiliar locations. The performance of both normal and mutant transplanted groups was clearly inferior to the untreated normals and, in some instances, close to or worse than the untreated mutants, even though the enzyme abnormalities of the mutants have been partially corrected. Hence, the behavioral deficits in the mutant mice were not restored to normal while similarly treated normal mice showed significant functional deterioration, indicating the detrimental consequence of this therapy in the neonatal period.

Original languageEnglish
Pages (from-to)1180-1186
Number of pages7
JournalJournal of Clinical Investigation
Issue number3
StatePublished - Sep 1994


  • Sly syndrome
  • behavioral sciences
  • central nervous system diseases
  • lysosomes
  • β-glucuronidase


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