IGFBP5 and infection: The viability of 2774 cells infected with adenoviruses expressing either vector or IGFBP5 (MOI = 5) was measured in 72 h after infection by MTT assay, which revealed that infection with adenovirus expressing IGFBP5 resulted in increased cell death relative to infection with adenovirus expressing vector only (Fig. 1D, lower panel).