A summary diagram of the results. In WT macrophages (left), treatment with PCT/Cisplatin induces the expression of WDR5 and MKL1, associating with increased H3K4 methylation, cytokine expression (i.e., MIP2) and tumor growth. Inhibition of WDR5 (OICR-9429) or MKL1 (CCG-203971) results in reduced cytokine expression. In Hpa-KO macrophages (right), the expression of SET1A, MLL1, and MKL1 are significantly lower vs. WT macrophages and their expression is not induced by PCT; H3K4 methylation is not increased by PCT/Cisplatin, nor cytokine expression.