NDLI: Caprine mucopolysaccharidosis IIID : Fetal and neonatal brain and liver glycosaminoglycan and morphological perturbations

Content Provider	Springer Nature Link
Author	Jones, Margaret Z. Alroy, Joseph Downs Kelly, Erinn Lucas, Rebecca E. Kraemer, Stacey A. Cavanagh, Kevin T. King, Barbara Hopwood, John J.
Copyright Year	2004
Abstract	Mucopolysaccharidosis IIID (MPS IIID) is a lysosomal storage disease associated with deficient activity of the enzyme N-acetylglucosamine 6-sulfatase (EC 3.1.6.14), a lysosomal hydrolase in the heparan sulfate glycosaminoglycan (HS-GAG) degradation pathway. In caprine MPS IIID, enzyme replacement therapy reversed early postnatal systemic but not primary or secondary central nervous system (CNS) substrate accumulations. The caprine MPS IIID large animal model system was used in this investigation to define the developmental profile of morphological and biochemical perturbations to estimate a time frame for therapeutic intervention. Light and electron microscopy were used to compare the CNS, liver, and kidney of normal +/+, MPS IIID carrier +/-, and MPS IIID-affected -/- goat kids (kids), at 60, 113–114, 128–129, and 135 d gestation (dg) of a 150-d gestational period, at birth, and at 59–64 d of postnatal (d-pn) age. In the CNS of -/- kids, morphological correlations of HS-GAG and glycolipid accumulations were evident in early differentiating neurons at 60 dg. CNS and systemic developmental, regional, and cellular differences in -/-kids at all time points included more prominent and earlier accumulation of lucent, putative HS-GAG substrates in lysosomes of meningeal and perivascular macrophages and hepatic sinusoidal cells than in CNS, hepatic, or renal parenchymal cells. The amounts and compositions of HS-GAG substrates in the brain and liver of +/+, +/-, and -/- kids were determined at 60, 65, 113–114, and 128–135 dg, at birth, and 53–78 d-pn. In the CNS of -/- kids, HS-GAG concentrations were variable and exceeded those of age-matched control tissue samples in the third but not the second trimester. In contrast, hepatic HS-GAG levels in -/- kids exceeded control values at all time points evaluated and paralleled the progressive morphological alterations. CNS and hepatic HS-GAG compositions in -/- kids were similar to each other and were more complex at all pre- and postnatal ages than those from control kids. Based on the time frame of development of CNS lesions and biochemical perturbations, prenatal therapeutic intervention in caprine MPS IIID is likely to be necessary to prevent or ameliorate substantive CNS and systemic lesions.
Starting Page	277
Ending Page	291
Page Count	15
File Format	PDF
ISSN	08958696
Journal	Journal of Molecular Neuroscience
Volume Number	24
Issue Number	2
e-ISSN	15591166
Language	English
Publisher	Humana Press
Publisher Date	2004-01-01
Publisher Place	Totowa
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Neurosciences Neurology
Content Type	Text
Resource Type	Article
Subject	Medicine Cellular and Molecular Neuroscience

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