ZFP36 and breast cancer: A more direct approach confirmed that TTP interacts with transcripts encoding for a number of cytokines (TNFα, IL-1β, IL-2, IL-6, GM-CSF), pro-inflammatory factors (iNOS, COX-2), proteins which have important roles in breast cancer invasion and metastasis (urokinase, urokinase receptor, metalloproteinase-1, VEGF), immediate-early response proteins like c-FOS and tristetraprolin itself [4-6].