Echoviruses bind heparan sulfate at the cell surface

Some echoviruses (EV) that bind decay-accelerating factor (DAF) also bind c ells of human and murine origins in a DAF-independent manner. Pretreatment of cells with heparinase 1 or heparin blocks the binding of radiolabeled vi rus to the cell surface, and heparin prevents infection of rhabdomyosarcoma cells by certain EV, including several low-passage clinical isolates of EV 6 and some EV that do not bind DAF. These studies suggest that heparan sul fate may be of in vivo relevance as an attachment molecule for EV.