Nisin, a potent bacteriocin and antibacterial peptide, attenuated the proliferation of colon adenocarcinoma cells and suppressed metastatic progression by downregulating carcinoembryonic antigen (CEA), carcinoembryonic cell adhesion molecule 6 (CEAM6), MMP2F, and MMP9F genes (116). Here, CEACAM5 is linked to colon adenocarcinoma.