NRG4 and neoplasm: Surprisingly, a negative correlation was observed between the mRNA expression levels of PDCD4 and tumor progression as shown in Figure 3F. In addition, we analyzed the expression profiles of RAB3IP, PDCD4, GOLGB1 and NRG4 in Normal and Primary tumors in the TCGA database on the UALCAN website(http://ualcan.path.uab.edu), The results showed that RAB3IP was highly expressed in tumors, and NRG4 and PDCD were downregulated in tumors.