MMP2 and gastric neoplasm: Bigelovin, tanshinone II-A, antartina, cinobufacini, curcumin, honokiol, and peperomin E showed anti-metastatic effects via the modulation of MMP-2/9, TIMPs, and N-cadherin under various experimental models of transplanted colon/gastric tumor tissues and cytolytic T cells in blood [3,13,15,16,18,19,23].