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  • Title: The structures of six urinary oligosaccharides that are characteristic for a patient with Morquio syndrome type B.
    Author: Michalski JC, Strecker G, van Halbeek H, Dorland L, Vliegenthart JF.
    Journal: Carbohydr Res; 1982 Mar 01; 100():351-63. PubMed ID: 6805953.
    Abstract:
    Morquio syndrome type B is an inherited, lysosomal storage disease characterised by a marked deficiency in acid beta-D-galactosidase, while the 2-acetamido-2-deoxy-beta-D-galactose 6-sulphate sulphatase activity is normal. Urinary oligosaccharides were studied in order to evaluate the effect of the diminished beta-D-galactosidase activity on the catabolism of glycoconjugates and to compare their structure with those excreted by patients with GM1-gangliosidosis. The following oligosaccharides were isolated: beta-D-Galp-(1 leads to 4)-beta-D-GlcpNAc-(1 leads to 2)-alpha-D-Manp-(1 leads to 6)-beta-D-Manp-(1 leads to 4)-D-GlcpNac(1), beta-D-Galp-(1 leads to 4)-beta-D-GlcpNAc-(1 leads to 2)-alpha-D-Manp-(1 leads to 6)-[alpha-D-Manp-(1 leads to 3)]-beta-D-Manp-(1 leads to 4)-D-GlcpNAc (2a), beta-D-Galp-(1 leads to 4)-beta-D-GlcpNAc-(1 leads to 2)-alpha-D-Manp-(1 leads to 3)-[alpha-D-Manp-(1 leads to 6)]-beta-D-Manp-(1 leads to 4)-D-GlcpNAc (2b), beta-D-Galp-(1 leads to 4)-beta-D-GlcpNAc-(1 leads to 2)-alpha-D-Manp-(1 leads to 3)-[beta-D-Galp-(1 leads to 4)-beta-D-GlcpNAc-(1 leads to 2)-alpha-D-Manp-(1 leads to 6)]-beta-D-Manp-(1 leads to 4)-D-GlcpNAc (3), beta-D-Galp-(1 leads to 4)-beta-D-Glcp-NAc-(1 leads to 2)-alpha-D-Manp-(1 leads to 3)-(beta-D-Galp-(1 leads to 4)-beta-D-GlcpNAc-(1 leads to 2)-[beta-D-Galp-(1 leads to 4)-beta-D-GlcpNAc-(1 leads to 6)]-alpha-D-Manp-(1 leads to 6))-beta-D-Manp-(1 leads to 4)-D-GlcpNAc (4), beta-D-Galp-(1 leads to 4)-beta-D-GlcpNAc-(1 leads to 2)-alpha-D-Manp-(1 leads to 3)-[beta-D-GlcpNAc-(1 leads to 4)]-[beta-D-Glap-(1 leads to 4)-beta-D-GlcpNAc-(1 leads to 2)-alpha-D-Manp-(1 leads to 6)]-beta-D-Manp-(1 leads to 4)-D-Glcp-NAc (5). Significant differences between Morquio syndrome type B and GM1- gangliosidosis have been observed, with regard to the excretion rate and the specific structures of urinary oligosaccharides. Compounds 2a, 2b, and 5 are novel members of the series of oligosaccharides isolated from the urine of patients with inherited lysosomal storage diseases.
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