IL6 and cancer: Here, live PANC-1 (Figure 2), SW620 (Figure 3), and MCF7 (Figure 4) cancer cells were added to TGFβ-1 (4.0 × 10−3 μg/mL), IL-6 (4.1 × 10−5 μg/mL), HGF (5.97 × 10−4 μg/mL), or untreated together with sialidase substrate 4-MUNANA (emission 450 nm, excitation 365 nm) for 1 min.