Subsequently, by transplanting FMRP knockout (FMRP‐KO) and wild‐type (WT) cancer cells into immunocompetent (SCID/beige or NSG) and immunodeficient (FVB/N or Balb/c) mice, they found that FMRP‐KO has not obvious effect on tumor cell growth in vivo and mouse survival in immunodeficient mice. This evidence concerns the gene FMR1 and cancer.