Figure 4 (A) PC3 cells were incubated for migration (16h) and invasion (24h) assay. DMEM/10% FBS, together with various concentration of NaHS (10nM-1mM) acting as a chemoattractant Data information Data shown represent the means ± SD (n=3 biological replicates) ANOVA followed by Tukey's post-hoc tes was used for the statistical analysis (*P<0.05; **P<0.01; ***P<0.001) (B) PC3 cells transfected with control or CTH siRNA were incubated for invasion (24h) assay. DMEM/10% FBS, with or without NaHS (1μM), acting as a chemoattractant Data information Data shown represent the means ± SD (n=3 biological replicates) ANOVA followed by Tukey's post-hoc tes was used for the statistical analysis (*P<0.05; **P<0.01; ***P<0.001) (C) Top: PC3 cells treated with 100 μM NaHS for 30 min at 37°C. Cells were lyzed and treated with or without DTT for 10min at 4°C before subjecting to the modified biotin switch assay with the antibody against p65 to detect S-sulfhydration. Down: quantitative analysis of SSH-p65 protein level, and normalized with total p65 level Data information Data shown represent the means ± SD (n=3 biological replicates) ANOVA followed by Tukey's post-hoc tes was used for the statistical analysis (*P<0.05; **P<0.01; ***P<0.001) (D) PC3 cells were incubate for invasion assay for 24 hrs. DMEM/10% FBS, together with 1μM NaHS and an NF-κB inhibitor (50μg/ml SN50, or 100nM QNZ), acting as a chemoattractant Data information Data shown represent the means ± SD (n=3 biological replicates) ANOVA followed by Tukey's post-hoc tes was used for the statistical analysis (*P<0.05; **P<0.01; ***P<0.001) (E) Real-Time RT-PCR analysis for IL-1β, VEGF, and MMP-13 mRNA levels in PC3 cells treated with 1μM NaHS for 24h Data information Data shown represent the means ± SD (n=3 biological replicates) Student's t-tes was used for the statistical analysis (*P<0.05; **P<0.01; ***P<0.001) (F) ELISA assay for IL-1β protein level in the culture medium of PC3 cells with various concentrations of NaHS (10nM-10μM) added for 24h Data information Data shown represent the means ± SD (n=3 biological replicates) ANOVA followed by Tukey's post-hoc tes was used for the statistical analysis (*P<0.05; **P<0.01; ***P<0.001) (G) Western blot analysis of the p65 expression in PC3 cells with p65 knock-out and then transfected with p65 wild-type or C38S mutant Data information Data shown represent the means ± SD (n=3 biological replicates) (H) PC3 cells with p65 knock-out with or without overexpression of p65 wild-type or C38S mutant were incubated for invasion assay for 24 hrs. DMEM/10% FBS was used as a chemoattractant Data information Data shown represent the means ± SD (n=3 biological replicates) ANOVA followed by Tukey's post-hoc tes was used for the statistical analysis (*P<0.05; **P<0.01; ***P<0.001)1x106 PC3 cells with p65 knock-out were transiently re-expressed p65 wild-type or C38S mutant and inoculated into the bloodstream via tail-vein injection. After 7 days of inoculation, mouse lung was collected to examine lung metastasis. (I) Images show H&E staining of the lungs from mice injected with p65 knockout PC3 cells re-expressing p65 wild-type or C38S mutant. Red arrows indicate metastatic nodules. Scale bar: 1mm1x106 PC3 cells with p65 knock-out were transiently re-expressed p65 wild-type or C38S mutant and inoculated into the bloodstream via tail-vein injection. After 7 days of inoculation, mouse lung was collected to examine lung metastasis The total metastatic nodules per lung (J were quantified. Data are presented as means ± SEM (n=7 mice per group). Student's t-test was used for the statistical analysis (*P<0.05)1x106 PC3 cells with p65 knock-out were transiently re-expressed p65 wild-type or C38S mutant and inoculated into the bloodstream via tail-vein injection. After 7 days of inoculation, mouse lung was collected to examine lung metastasis percentage of the metastatic area per lung (K) were quantified. Data are presented as means ± SEM (n=7 mice per group). Student's t-test was used for the statistical analysis (*P<0.05)