S1P2 antagonist JTE-013 inhibited growth of NB xenografts. A, The tumor growth curves of control and JTE-013-treated mice (n=7). B, VEGF mRNA levels in control and JTE-013-treated tumors by quantitative real-time PCR. C, Vessel density in control and JTE-013-treated tumors by PECAM-1 staining. D, Apoptotic cells in control and JTE-013-treated tumors labeled by TUNEL method. *, P < 0.05, **, P < 0.01 versus the corresponding control.