A cancer-unique glycan: de-N-acetyl polysialic acid (dPSA) linked to cell surface nucleolin depends on re-expression of the fetal polysialyltransferase ST8SIA2 gene
Abstract:Background: Polysialic acid (PSA) modifies a few cell surface proteins in humans mainly during fetal development and some blood cells in adults. Two genes in humans, ST8SIA2 and ST8SIA4, code for polysialyltransferases that synthesize PSA. The product of ST8SIA2, STX, is highly expressed during fetal development and in many cancers but not in adult normal human cells. The product of ST8SIA4, PST1, is expressed in fetal and some adult tissues and also in many cancers. We identified a derivative of PSA containin… Show more
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