TGFB1 and gastric cancer: Interestingly, based on the SGO1-AS1 levels, we performed a gene set enrichment analysis (GSEA) using The Cancer Genome Atlas (TCGA: https://cancergenome.nih.gov) stomach adenocarcinoma RNA-seq dataset and demonstrated that TGFβ1 target genes were significantly enriched in GC patients with low SGO1-AS1 expression (Fig. 4f), implying a role of this lncRNA in regulating TGFβ signaling.