SPOP and gastric cancer: For instance, CSC maintenance in glioblastoma, colon cancer, gastric cancer, and prostate cancer is regulated by CD133-mediated AKT, leucine-rich G-protein-coupled receptor 5 (LGR5)-mediated Wnt/β-catenin and speckle-type POZ protein (SPOP)-mediated Nanog pathways[4-8].