A,B, The netrin-1 receptor protein (A) and mRNA (B) expression levels were analyzed by western blot and qRT-PCR, respectively. N.D. stands for “not detected.” C,D, D458 cells were transfected with control, UNC5B or neogenin siRNA. Receptor expression was measured by western blot, and MB cell invasiveness was assessed in Matrigel-coated Transwells. E,F, D458 cells were transfected with control, neogenin or netrin-1 siRNA. Receptor expression was measured by western blot, and MB cell invasiveness was assessed in Matrigel-coated Transwells. Data represent the mean ± SD (n=3), * p < 0.05.