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    Endothelial and fibroblast cell-derived heparan sulphate bind with differing affinity to basic fibroblast growth factor.

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    Authors
    Pye, David A
    Kumar, Shant
    Affiliation
    CRC Department of Drug Development, Christie Hospital, Manchester, United Kingdom. DPye@picr.man.ac.uk
    Issue Date
    1998-07-30
    
    Metadata
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    Abstract
    Heparan sulphate from endothelial cells (ECHS) has been shown to bind to bFGF with a lower affinity than that seen for 3T3 fibroblast HS (FHS). To investigate the structural reasons for the low affinity binding of ECHS to bFGF, enzymatic degradation of intact ECHS and FHS chains was undertaken. Filter binding assays showed ECHS heparinase III-resistant fragments 6-7 disaccharides in length and had affinity for bFGF equivalent to that of the intact ECHS chains. The largest resistant fragments from FHS, again 6-7 disaccharides in length, bound to bFGF with a similar affinity to the largest ECHS oligosaccharides, and they therefore have considerably lower affinity than seen for the intact FHS chains. Disaccharide compositional analysis of both ECHS and FHS oligosaccharides showed them to contain similar amounts of 2-O-, 6-O-, and N-sulphated disaccharides. These results suggest that the sulphation pattern within sulphated HS domains and their overall length are not the sole contributors to the binding of intact HS chains to bFGF. It is suggested that domain organisation and frequency of occurrence of large heparinase III-resistant oligosaccharides within intact chains play an important role not only in governing the maximum observed binding affinity of intact chains in the assay system used, but also in the regulation of other biological properties of HS.
    Citation
    Endothelial and fibroblast cell-derived heparan sulphate bind with differing affinity to basic fibroblast growth factor. 1998, 248 (3):889-95 Biochem. Biophys. Res. Commun.
    Journal
    Biochemical and Biophysical Research Communications
    URI
    http://hdl.handle.net/10541/92756
    DOI
    10.1006/bbrc.1998.9081
    PubMed ID
    9704022
    Type
    Article
    Language
    en
    ISSN
    0006-291X
    ae974a485f413a2113503eed53cd6c53
    10.1006/bbrc.1998.9081
    Scopus Count
    Collections
    All Paterson Institute for Cancer Research

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