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- W2019025695 abstract "Mucopolysaccharidosis type VII (MPS VII) is a heritable lysosomal storage disease caused by a deficiency in beta-glucuronidase (GUSB) activity, leading to progressive accumulation of undegraded glycosaminoglycans in many tissues. Clinical features include growth and mental retardation, hearing and visual defects, shortened lifespan, and skeletal deformities. A murine model of MPS VII has been described that shares many of the manifestations of the human disease, including the skeletal dysplasia. In this study we describe abnormalities in the cellular morphology and function of osteoclasts and a localized defect in bone formation rate in the MPS VII mouse. Ultrastructural analysis revealed that MPS VII osteoclasts fail to form ruffled border membranes and many appeared to be detached from the bone surface. Following bone marrow transplantation, osteoclasts derived from wild-type donors showed normal morphology and were closely associated with the bone surface in MPS VII recipients. In vitro bone resorption assays demonstrated that MPS VII osteoclasts formed significantly smaller and fewer pits than those formed by osteoclasts derived from normal mice of the same strain. Although osteoclast morphology and function appeared to be abnormal in the MPS VII mouse, interleukin-1 (IL-1)-induced osteoclastogenesis in vivo was not affected. In addition to the osteoclast defects, MPS VII mice demonstrated a slower rate of bone matrix deposition in the epiphysis by in vivo calcein labeling experiments. These data suggest that abnormal morphology and function of MPS VII osteoclasts, combined with deficient matrix deposition, may contribute to the skeletal defects observed in this lysosomal storage disease." @default.
- W2019025695 created "2016-06-24" @default.
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- W2019025695 date "2002-02-01" @default.
- W2019025695 modified "2023-09-26" @default.
- W2019025695 title "Abnormal osteoclast morphology and bone remodeling in a murine model of a lysosomal storage disease" @default.
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- W2019025695 doi "https://doi.org/10.1016/s8756-3282(01)00679-2" @default.
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