Finally, in contrast to a recent report showing that miR-199a-5p, by targeting SMAD4, inhibited TGFβ-induced gastric cancer cell growth [53], we found that lung fibroblasts overexpressing miR-199a-5p have an increased SMAD4 expression (Figure S14B), suggesting thus a potential opposite function of this miRNA between epithelial and mesenchymal cells. Here, TGFB1 is linked to gastric cancer.