PIK3CA and colorectal cancer: Among the many studies of efficient combined treatments in colorectal cancer cells involving TRAIL: quercetin can enhance TRAIL-mediated apoptosis in colon cancer cells by inducing the accumulation of death receptors in lipid rafts [32] and the selective BRAF V600E inhibitor PLX4720 acts synergistically with TRAIL in order to overcome oncogenic PIK3CA resistance in colon cancer cells [33].