We predicted the possible mRNAs involved using three algorithms (miRDB, miRTarBase and TargetScan) (Figure 7C), and qRT‐PCR validation was performed for the six target genes predicted to be relatively highly expressed in DLBCL and NC, and BCL‐2 expression was significantly higher than that of matched healthy controls (Figure 7D). This evidence concerns the gene BCL2 and diffuse large B-cell lymphoma.