DICER1 and gastric cancer: No difference in proliferation, migration, invasion, and apoptosis was found after trastuzumab addition in SGC7901 cells by comparing control GC cells and GC cell plus trastuzumab (Fig. 1B–I); however, this antibody decreased the proliferation capacity from 48 to 72 h (p < 0.05), migration (p < 0.05), and invasion (p < 0.05), whereas it increased the apoptosis rate (p < 0.01) of SGC7901 cell when comparing pCMV-Dicer and pCMV-Dicer plus trastuzumab GC cells (Fig. 1B–I).