Triple-negative breast cancers (TNBCs) are aggressive with no effective targeted therapies. A combined database analysis identified 32 inflammation-related genes differentially expressed in TNBCs, 10 proved critical for anchorage-independent growth. In TNBC cells a LPA-LPAR2-EZH2 NF-kappaB signaling cascade was essential for expression of IL-6, IL-8 and CXCL1. Concurrent inhibition of IL-6 and IL-8 expression dramatically inhibited colony formation and cell survival in vitro and stanched tumor engraftment and growth in vivo. A Cox multivariable analysis of patient specimens revealed that IL-6 and IL-8 expression predicted patient survival times. Together these findings offer a rationale for dual inhibition of IL-6/IL-8 signaling as a therapeutic strategy to improve outcomes for TNBC patients.