UCA1 and central nervous system cancer: Moreover, the luciferase activity of Luc‐Slug‐3′UTR was increased in glioma cells cotransfected with Luc‐UCA1‐wt, Luc‐UCA1‐mut‐1 or Luc‐UCA1‐mut‐203a, rather than with Luc‐UCA1‐mut (Fig. 5D).