SFN and neoplasm: In athymic nude mice engrafted s.c. with human PC-3 cells, a delay in tumor progression (***p < 0.001 between VSVΔ51 and VSVΔ51+SFN) and prolonged survival was also observed with co-administration of VSVΔ51+SFN (Figures 2D and 2E), without weight loss (Figure 2F) (median survival in days: NT = 27; SFN = 27; VSVΔ51 = 36; VSVΔ51+SFN = 48).