FMR1 and neoplasm: The Relative tumor volumes of U251 cell xenografts infected with lenti-FMRP-shRNA were reduced by 37.2% on day 9 (P<0.05), 44.2% on day 12 (P<0.05), and 36.3% on day 15 (P<0.01), as compared with uninfected xenografts (Figures 6B and 6C).