SEMA3E and gastric cancer: An analysis of SEMA3E expression in gastric cancer cell lines by PCR and quantitative real-time PCR showed that a majority of gastric cancer cell lines displayed low SEMA3E levels compared with HEK-293 and MCF-7 cells (Fig. 1F and 1G), two cell lines reported to express SEMA3E. Moreover, no difference was observed between gastric cancer and adjacent normal tissues with respect to PLXND1mRNA, the Sema3E-specific receptor (Fig. S2A and S2B).