Effect of interferon-γ and srhCD40L on proliferation. In some wells, interferon-γ (500 U/mL) was added with srhCD40L (10 μg/mL) during the assay; 72 hours later, an MTT assay was performed. Values presented as percent control(msIgG1). (A) MDA-231 and (B) T-47D. Significant (P < .05) differences in proliferation were detected.