title: Obligatory requirement of sulfation for P-selectin binding to human salivary gland carcinoma Acc-M cells and breast carcinoma ZR-75-30 cells.
abstract: Stimulated endothelial cells and activated platelets express P-selectin, which reacts with P-selectin glycoprotein ligand-1 (PSGL-1) for leukocyte rolling on the stimulated endothelial cells and heterotypic aggregation of the activated platelets on leukocytes. P-selectin also binds to several cancer cells in vitro and promotes the growth and metastasis of human colon carcinoma in vivo. The P-selectin/PSGL-1 interaction requires tyrosine sulfation. However, it is unknown whether sulfation is necessary for P-selectin binding to somatic cancer cells. In this study, we show that P-selectin mediated adhesion of Acc-M cells, a cell line derived from a human adenoid cystic carcinoma of salivary gland. These cells had a moderate expression of heparan sulfate-like proteoglycans, but had no detectable expressions of PSGL-1, CD24, Lewis(x), and sialyl Lewis(x). Treatment with sodium chlorate (a sulfation biosynthesis inhibitor), but not 4-methylumbelliferyl-beta-D-xyloside (a proteoglycan biosynthesis inhibitor) or heparinases, reduced adhesion of these cells to P-selectin. Sodium chlorate also inhibited the P-selectin precipitation of the 160-, 54-, and 36-kDa molecules from the cell surface of Acc-M cells. Furthermore, P-selectin could bind to human breast carcinoma ZR-75-30 cells in a sulfation-dependent manner. Our results thus indicate that sulfation is essential for adhesion of nonblood-borne, epithelial-like human cancer cells to P-selectin.
authors.affiliation: Laboratory of Molecular Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China.
authors.forename: Yan-Qing
authors.initials: YQ
authors.lastname: Ma
authors.forename: Jian-Guo
authors.initials: JG
authors.lastname: Geng
mesh_terms: D015703:Antigens, CD / Q000378:metabolism; D001943:Breast Neoplasms / Q000378:metabolism*; D051927:CD24 Antigen; D002277:Carcinoma / Q000378:metabolism*; D002448:Cell Adhesion / Q000187:drug effects; D002704:Chlorates / Q000494:pharmacology; D005434:Flow Cytometry; D019812:Heparan Sulfate Proteoglycans / Q000502:physiology; D006801:Humans; D008562:Membrane Glycoproteins / Q000378:metabolism; D019007:P-Selectin / Q000378:metabolism*; D011485:Protein Binding; D012468:Salivary Gland Neoplasms / Q000378:metabolism*; D013431:Sulfates / Q000378:metabolism*; D014407:Tumor Cells, Cultured
chemical_list: D015703:Antigens, CD; D051927:CD24 Antigen; C497889:CD24 protein, human; D002704:Chlorates; D019812:Heparan Sulfate Proteoglycans; D008562:Membrane Glycoproteins; D019007:P-Selectin; C084882:P-selectin ligand protein; D013431:Sulfates; C032706:sodium chlorate