NDRG1 and colorectal carcinoma: By analyzing primary data from dataset GSE71210, in which Affymetrix HG-U133A array was used to compare the expression patterns of genes between parental DiFi CRC cells and CTX-resistant (CR) DiFi5 cells, the result showed that NDRG1 was obviously overexpressed in the CR cells (1.89-fold increase, p < 0.001) (Fig. 1A).