PECAM1 and neoplasm: The results of the PECAM-1 protein expression analysis with ELISA indicated that the measured values (MVs) and BCA correction values of PECAM-1 in the tumor xenografts of the nude mice treated with siRNACD31-RNAi-mate complexes (the siRNACD31 group) were decreased compared with the values of the tumor xenografts of the nude mice treated with saline (control group) (all P<0.01; Fig. 6).