[Biological activity of the poly(G).poly(C) complex, modified by divalent platinum compounds].

Modification of poly(G).poly(C) with cys-diaminodichloroplatinum (cys-DDP) at the level of rb = 0.02 increased the in vivo antiviral and interferon-inducing activity of the complex, in contrast to the data reported for complex poly(G).poly(C). Antiinfluenza activity in this case depends on the method of modification and increases more intensively when a ready complex is treated with cys-DDP, as against treatment of poly(G) alone before the formation of a complex with poly(C). If rb is increased, the activity reduces again. Modification with trans-DDP at rb = 0.02 also leads to an increase of antiinfluenza activity of poly(G).poly(C), but mainly after pretreatment of poly(G).