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    Heterogeneity of cell-associated and secretory heparan sulphate proteoglycans produced by cultured human neuroblastoma cells.

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    Authors
    Hampson, Ian N
    Kumar, Shant
    Gallagher, John T
    Affiliation
    Department of Clinical Research, U.K.
    Issue Date
    1984-09-28
    
    Metadata
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    Abstract
    Biosynthetically radiolabelled heparan sulphate proteoglycans have been isolated from the growth medium and the cell lysate of a human neuroblastoma cell line (CHP100). Chromatography on Sepharose CL-4B identified two heparan sulphate proteoglycans in the medium (Kav 0.220 and 0.389), whereas in the cell lysate the major proteoglycan species were more heterogenous and of a smaller overall molecular size (Kav 0.407) than the medium-derived counterparts. Chromatography on Sepharose CL-6B of free heparan sulphate glycosaminoglycan chains showed that the majority of cell-layer-derived material heparan sulphate 2, Kav = 0.509) was smaller than medium heparan sulphates (heparan sulphate 1 and heparan sulphate 2, Kav 0.230 and 0.317). Analysis of the patterns of polymer sulphation by nitrous acid treatment, gel chromatography and high-voltage electrophoresis established that in each heparan sulphate fraction there was on average 1.1 sulphate residues per disaccharide with an N:O sulphate ratio of 1.1. Heparan sulphate in the medium had a high proportion of di-O-sulphated disaccharides in regions of the chain with repeat disaccharide sequences of structure GlcA-GlcNSO3, whereas cell-associated material was enriched in di-O-sulphated tetrasaccharides of alternating sequences GlcA-GlcNAc-GlcA-GlcNSO3. The identification of several populations of heparan sulphate proteoglycans differing in molecular size and glycosaminoglycan fine structure may reflect the functional diversity of this family of macromolecules in the nervous system.
    Citation
    Heterogeneity of cell-associated and secretory heparan sulphate proteoglycans produced by cultured human neuroblastoma cells. 1984, 801 (2):306-13 Biochim Biophys Acta
    Journal
    Biochimica et Biophysica Acta
    URI
    http://hdl.handle.net/10541/123876
    DOI
    10.1016/0304-4165(84)90081-3
    PubMed ID
    6236854
    Type
    Article
    Language
    en
    ISSN
    0006-3002
    ae974a485f413a2113503eed53cd6c53
    10.1016/0304-4165(84)90081-3
    Scopus Count
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    All Paterson Institute for Cancer Research

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