KRAS and thyroid cancer: 19–22 In previous studies that were done in our lab, we found that FTS inhibits the growth of thyroid cancer cells (ARO) in vivo and in vitro and decreased K-Ras, K-Ras-GTP, p-ERK and Gal-3 levels.23 Modified citrus pectin (MCP) is a water-soluble citrus-fruit-derived polysaccharide fiber that specifically inhibits Gal-3.