In conclusion, this study demonstrated that insulin regulated MMP‐2 gelatinolytic activity via its “metabolic” PI3K/AKT and “mitogenic” ERK1/2 signalling pathways in immortalized human pancreatic ductal cell lines, as well as the synergistic effect of hyperinsulinemia and KRAS mutation in the early stage of pancreatic cancer. The gene discussed is MAPK3; the disease is hyperinsulinism.