THP-1s expressing ASC-GFP were stimulated for 6 h with virus and antibody or 200 ng/well HT-DNA or 10 μM Nigericin, in the presence of the pan-caspase inhibitor zVAD-fmk. A representative image (scale bar 100 μm) and quantification of number of cells with ASC specks from three independent experiments (mean ± s.e.m, *P-value ≤ 0.05, paired, two-tailed t-test) is shown. 