MACC1 and colorectal carcinoma: Cell-free culture supernatants from SW480/vector cells, two independent SW480/MACC1 clones (#10, #43) expressing MACC1 ectopically, or SW620 cells, which express high intrinsic MACC1 levels, were added to the CRC cell line SW480, which intrinsically expresses minimal amounts of MACC1.