MMP9 and salivary gland cancer: To further examine MMP9 regulation by ETS1, SMARTPool siRNAs targeting ETS1 were transfected into two iSGECs cell lines, iSGEC-nSS2 (FS = 0.16) and iSGEC-pSS1 (FS = 1.8), and two salivary gland cancer derived cell lines, HMC-3A and A253 (Fig. 1C–F).