O-glycan inhibitors of selectin mediated inflammation derived fr

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514 54, 514 62, 536 172, 536 187, A61K 3170

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061242675

ABSTRACT:
Tyrosine sulfate on PSGL-1, particularly at least one of residues 46, 48 and 51, functions in conjunction with sialylated and fucosylated glycans, most preferably Thr-57, to mediate high affinity binding to P-selectin. PSGL-1 O-glycans have been determined to consist of disialylated or neutral forms of the core-2 tetrasaccharide Gal.beta.1.fwdarw.4GlcNAc.beta.1.fwdarw.6(Gal.beta.1.fwdarw.3)GalNAcOH. A minority of the O-glycans are .alpha.1,3 fucosylated that occur as two major species containing the sialyl Lewis x antigen--one species is a disialylated monofucosylated glycan:

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