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- W1999777884 abstract "Heparin, with or without the addition of an adrenocorticosteroid, can inhibit normal angiogenesis in the chick embryo chorioallantoic membrane. Low- or non-sulphated heparin fragments also have anti-angiogenic effect. Attempts to define a saccharide structure responsible for the anti-angiogenic effect implicated a -[GlcA beta 1,4-GlcNAc alpha 1,4]n-sequence. This structure represents the product of the initial polymerization reaction in heparin/heparan sulphate biosynthesis. It persists in the non-sulphated regions of heparan sulphate and also occurs in the Escherichia coli K5 capsular polysaccharide. The K5 polysaccharide, fragments thereof down to octasaccharide size and analogous N-acetylated fragments of heparan sulphate, all showed anti-angiogenic activity. Hyaluronan, however, with the isomeric -[GlcA beta 1,3-GlcNAc beta 1,4]n-structure was inactive. The anti-angiogenic activity of -[GlcA beta 1,4-GlcNAc alpha 1,4]n-containing saccharides was potentiated by the presence of L-iduronic acid and one or two O-sulphate groups in the non-reducing-terminal disaccharide unit. The anti-angiogenic effect of these non- or low-sulphated saccharides was unaffected by the addition of hydrocortisone. Endothelial cell surface-bound heparan sulphate proteoglycans may represent a pool of precursors of anti-angiogenic oligosaccharides which may be of primary importance in the regulation of angiogenesis." @default.
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- W1999777884 date "1993-12-01" @default.
- W1999777884 modified "2023-10-18" @default.
- W1999777884 title "Low-sulphated oligosaccharides derived from heparan sulphate inhibit normal angiogenesis" @default.
- W1999777884 doi "https://doi.org/10.1093/glycob/3.6.567" @default.
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