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The Journal of Cell Biology, Vol 96, 1820-1823, Copyright © 1983 by The Rockefeller University Press

ARTICLES

Correlation between cell substrate attachment in vitro and cell surface heparan sulfate affinity for fibronectin and collagen

SC Stamatoglou and JM Keller

Heparan sulfate glycosaminoglycan, isolated from the cell surface of nonadhering murine myeloma cells (P3X63-Ag8653), does not bind to plasma fibronectin, but binds partially to collagen type I, as assayed by affinity chromatography with proteins immobilized on cyanogen bromide-activated Sepharose 4B. Identical results were obtained when myeloma heparan sulfate was cochromatographed, on the same fibronectin and collagen columns, with cell surface heparan sulfates collagen columns, with cell surface heparan sulfates from adhering Swiss mouse 3T3 and SV3T3 cells. These latter heparan sulfates do, however, bind to both fibronectin and collagen, as reported earlier (Stamatoglou, S.C., and J.M. Keller, 1981, Biochim. Biophys. Acta., 719:90-97). Cell adhesion assays established that hydrated collagen substrata can support myeloma cell attachment, but fibronectin cannot. Saturation of the heparan sulfate binding sites on the collagen substrata with heparan sulfate or heparin, prior to cell inoculation, abolished the ability to support cell adhesion, whereas chondroitin 4 sulfate, chondroitin 6 sulfate, and hyaluronic acid had no effect.
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