title: Effect of polyionic compounds on the adsorption of polyoma virus.
abstract: The inhibitory effect of polyionic compounds, including dextran sulfates and poly-L-lysines of various molecular weight, on the cytopathogenicity of polyoma virus was studied. Poly-L-lysines were found to be more potent inhibitors of polyoma virus than dextran sulfates in UC1B cells. The 50% effective concentrations (EC50) were found to be inversely related to the molecular weight of the polymers. The higher the molecular weight of poly-L-lysine, the more effective was the polymer in inhibiting virus-induced cytopathogenicity. Incubation of the cells with poly-L-lysines was found to increase the zeta potential of the cells, whereas no significant change of the electrokinetic behavior was observed for dextran sulfate-treated cells, indicating that poly-L-lysines were adsorbed to the cells and prevented virus adsorption through steric hindrance effect. Studies using 3H-labeled virions confirmed that poly-L-lysines inhibit virus adsorption to the host cells. The results obtained from this study indicated that poly-L-lysines bind preferentially to UC1B cells through electrostatic interactions, whereas dextran sulfates are not effective inhibitors of polyoma virus.
authors.affiliation: School of Pharmacy, College of Medicine, National Taiwan University, Taipei, Taiwan.
authors.forename: Y W
authors.initials: YW
authors.lastname: Yang
authors.forename: J C
authors.initials: JC
authors.lastname: Yang
mesh_terms: D000818:Animals; D002460:Cell Line; D016264:Dextran Sulfate / Q000494:pharmacology*; D051379:Mice; D011107:Polylysine / Q000031:analogs & derivatives*; D011120:Polyomavirus / Q000187:drug effects* / Q000502:physiology
chemical_list: D011107:Polylysine; D016264:Dextran Sulfate