MMP2 and cancer: gastric cancer cell (GC SGC-7901 and MGC-803) proliferation was inhibitedreduced migration and invasiveness of cancer cellslowering the level of MMP2, p-ERK1/2, NF-kB p-P65 and NF-kB P65 proteins in neoplastic cellsstunted tumor growthinhibited metastasis of gastric cancer to the liver