Effect of sulfated colominic acid on enteric virus (rotavirus, poliovirus and coxsackievirus) infections in vitro.

Sulfated colominic acid exhibited suppressive effects on SA11 (simian rotavirus)- and MO (human rotavirus)-infections, but not on Wa (human rotavirus)-, Sabin 1 (poliovirus 1)-, and Nancy (coxsackie B3 virus)-infections, in vitro. The infection of SA11 was found to be inhibited by mixed treatment and early posttreatment with sulfated colominic acid, but not by pretreatment, by plaque assay and multiple growth assay. The results were confirmed by the infectivity titer, RNA polyacrylamide gel electrophoresis, and electron microscopic analysis. The mechanism of the suppressive effect was suggested to be adsorption inhibition at an early stage of the infection.