CCL3 and head and neck squamous cell carcinoma: Initially, we assessed CCL3 production by HNSCC metastatic (HN12) and non-metastatic (HN13) cell lines under steady state conditions and observed that the metastatic lineage produced increased levels of CCL3 in relation to the non-metastatic (35.69±1.55 and 13.97±8.35, respectively) (Figure 5A).