COL5A1 and gastric cancer: By comparing the expression levels of miR-137-3p (Figure 3A) and COL5A1 (Figure 3B,C) in GES-1 and four GC cell lines (AGS, HGC27, MGC803, MKN45), we obtained results consistent with the bioinformatics analyses, that is, miR-137-3p was expressed at low levels in GC, while COL5A1 was highly expressed.