Figure 4.
Relative biological potency of mouse versus human IL-12. Human PBMCs were incubated with increasing amounts of IL-12 produced from Ad5-yCD/mutTKSR39rep-mIL12 (expressing mouse IL-12) or Ad5-yCD/mutTKSR39rep-hIL12 (expressing human IL-12) and IFN-γ production (left) and cell proliferation (right) were measured 72 hours later. For human IL-12, both laboratory grade and clinical grade adenovirus was examined. Each data point represents the mean of three independent determinations with SD <5%. IFN-γ production with no added IL-12 was 3.2 pg/ml.