According to the ceRNA hypothesis motioned above, we screened out 4 eligible lncRNAs (DLGAP1-AS1, PVT1, RECQL4 and HCG18) associated with downregulated miRNAs that were both significantly upregulated in GC and correlated with very poor survival (Figure 4A–4D). The gene discussed is DLGAP1; the disease is gastric cancer.