NRP1 and cancer: We measured mRNA expression of VEGFB, VEGFC, VEGFD ligands, of their receptors VEGFR1, VEGFR3 and of their coreceptors NRP1 and NRP2. Except for the expression of VEGFD, which was significantly reduced in JSRV-induced adenocarcinomas, none of the other genes were differentially expressed in cancers (Figure 3).