PTGDR and neoplasm: Moreover, the tumor volumes in the lncRNA-KRTAP5-AS1+CLDN4 and lncRNA-TUBB2A+CLDN4 groups were larger (1.58 ± 0.21 cm3 and 1.49 ± 0.21 cm3, respectively) than in the CLDN4 group, which supported the findings of the in vitro experiments (Fig. 7c).